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1 | /* | |
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 | */ | |
20 | ||
21 | /* | |
22 | * File: vnc_import_bgp.c | |
23 | * Purpose: Import routes from BGP unicast directly (not via zebra) | |
24 | */ | |
25 | ||
26 | #include "lib/zebra.h" | |
27 | #include "lib/prefix.h" | |
28 | #include "lib/agg_table.h" | |
29 | #include "lib/vty.h" | |
30 | #include "lib/log.h" | |
31 | #include "lib/memory.h" | |
32 | #include "lib/linklist.h" | |
33 | #include "lib/plist.h" | |
34 | #include "lib/routemap.h" | |
35 | #include "lib/lib_errors.h" | |
36 | ||
37 | #include "bgpd/bgpd.h" | |
38 | #include "bgpd/bgp_ecommunity.h" | |
39 | #include "bgpd/bgp_attr.h" | |
40 | #include "bgpd/bgp_route.h" | |
41 | #include "bgpd/bgp_mplsvpn.h" /* for RD_TYPE_IP */ | |
42 | ||
43 | #include "bgpd/rfapi/vnc_export_bgp.h" | |
44 | #include "bgpd/rfapi/bgp_rfapi_cfg.h" | |
45 | #include "bgpd/rfapi/rfapi.h" | |
46 | #include "bgpd/rfapi/rfapi_import.h" | |
47 | #include "bgpd/rfapi/rfapi_private.h" | |
48 | #include "bgpd/rfapi/rfapi_monitor.h" | |
49 | #include "bgpd/rfapi/rfapi_vty.h" | |
50 | #include "bgpd/rfapi/vnc_import_bgp.h" | |
51 | #include "bgpd/rfapi/vnc_import_bgp_p.h" | |
52 | #include "bgpd/rfapi/vnc_debug.h" | |
53 | ||
54 | #define ENABLE_VNC_RHNCK | |
55 | ||
56 | #define DEBUG_RHN_LIST 0 | |
57 | ||
58 | static struct rfapi_descriptor vncHDBgpDirect; /* dummy nve descriptor */ | |
59 | static struct rfapi_descriptor vncHDResolveNve; /* dummy nve descriptor */ | |
60 | ||
61 | /* | |
62 | * For routes from another AS: | |
63 | * | |
64 | * If MED is set, | |
65 | * LOCAL_PREF = 255 - MIN(255, MED) | |
66 | * else | |
67 | * LOCAL_PREF = default_local_pref | |
68 | * | |
69 | * For routes from the same AS: | |
70 | * | |
71 | * LOCAL_PREF unchanged | |
72 | */ | |
73 | uint32_t calc_local_pref(struct attr *attr, struct peer *peer) | |
74 | { | |
75 | uint32_t local_pref = 0; | |
76 | ||
77 | if (!attr) { | |
78 | if (peer) { | |
79 | return peer->bgp->default_local_pref; | |
80 | } | |
81 | return bgp_get_default()->default_local_pref; | |
82 | } | |
83 | ||
84 | if (peer && (peer->as != peer->bgp->as)) { | |
85 | if (attr->flag & ATTR_FLAG_BIT(BGP_ATTR_MULTI_EXIT_DISC)) { | |
86 | if (attr->med > 255) { | |
87 | local_pref = 0; | |
88 | } else { | |
89 | local_pref = 255 - attr->med; | |
90 | } | |
91 | } else { | |
92 | local_pref = peer->bgp->default_local_pref; | |
93 | } | |
94 | } else { | |
95 | if (attr->flag & ATTR_FLAG_BIT(BGP_ATTR_LOCAL_PREF)) { | |
96 | local_pref = attr->local_pref; | |
97 | } else { | |
98 | if (peer && peer->bgp) { | |
99 | local_pref = peer->bgp->default_local_pref; | |
100 | } | |
101 | } | |
102 | } | |
103 | ||
104 | return local_pref; | |
105 | } | |
106 | ||
107 | static int is_host_prefix(struct prefix *p) | |
108 | { | |
109 | switch (p->family) { | |
110 | case AF_INET: | |
111 | return (p->prefixlen == 32); | |
112 | case AF_INET6: | |
113 | return (p->prefixlen == 128); | |
114 | } | |
115 | return 0; | |
116 | } | |
117 | ||
118 | /*********************************************************************** | |
119 | * RHN list | |
120 | ***********************************************************************/ | |
121 | ||
122 | struct prefix_bag { | |
123 | struct prefix hpfx; /* ce address = unicast nexthop */ | |
124 | struct prefix upfx; /* unicast prefix */ | |
125 | struct bgp_info *ubi; /* unicast route */ | |
126 | }; | |
127 | ||
128 | static const uint8_t maskbit[] = {0x00, 0x80, 0xc0, 0xe0, 0xf0, | |
129 | 0xf8, 0xfc, 0xfe, 0xff}; | |
130 | ||
131 | int vnc_prefix_cmp(void *pfx1, void *pfx2) | |
132 | { | |
133 | int offset; | |
134 | int shift; | |
135 | uint8_t mask; | |
136 | ||
137 | struct prefix *p1 = pfx1; | |
138 | struct prefix *p2 = pfx2; | |
139 | ||
140 | if (p1->family < p2->family) | |
141 | return -1; | |
142 | if (p1->family > p2->family) | |
143 | return 1; | |
144 | ||
145 | if (p1->prefixlen < p2->prefixlen) | |
146 | return -1; | |
147 | if (p1->prefixlen > p2->prefixlen) | |
148 | return 1; | |
149 | ||
150 | offset = p1->prefixlen / 8; | |
151 | shift = p1->prefixlen % 8; | |
152 | if (shift == 0 && offset) { /* catch aligned case */ | |
153 | offset--; | |
154 | shift = 8; | |
155 | } | |
156 | ||
157 | /* Set both prefix's head pointer. */ | |
158 | const uint8_t *pp1 = (const uint8_t *)&p1->u.prefix; | |
159 | const uint8_t *pp2 = (const uint8_t *)&p2->u.prefix; | |
160 | ||
161 | while (offset--) { | |
162 | if (*pp1 < *pp2) | |
163 | return -1; | |
164 | if (*pp1 > *pp2) | |
165 | return 1; | |
166 | ++pp1; | |
167 | ++pp2; | |
168 | } | |
169 | ||
170 | mask = maskbit[shift]; | |
171 | if ((*pp1 & mask) < (*pp2 & mask)) | |
172 | return -1; | |
173 | if ((*pp1 & mask) > (*pp2 & mask)) | |
174 | return 1; | |
175 | ||
176 | return 0; | |
177 | } | |
178 | ||
179 | static void prefix_bag_free(void *pb) | |
180 | { | |
181 | XFREE(MTYPE_RFAPI_PREFIX_BAG, pb); | |
182 | } | |
183 | ||
184 | #if DEBUG_RHN_LIST | |
185 | static void print_rhn_list(const char *tag1, const char *tag2) | |
186 | { | |
187 | struct bgp *bgp; | |
188 | struct skiplist *sl; | |
189 | struct skiplistnode *p; | |
190 | struct prefix_bag *pb; | |
191 | int count = 0; | |
192 | ||
193 | bgp = bgp_get_default(); | |
194 | if (!bgp) | |
195 | return; | |
196 | ||
197 | sl = bgp->frapi->resolve_nve_nexthop; | |
198 | if (!sl) { | |
199 | vnc_zlog_debug_verbose("%s: %s: RHN List is empty", | |
200 | (tag1 ? tag1 : ""), (tag2 ? tag2 : "")); | |
201 | return; | |
202 | } | |
203 | ||
204 | vnc_zlog_debug_verbose("%s: %s: RHN list:", (tag1 ? tag1 : ""), | |
205 | (tag2 ? tag2 : "")); | |
206 | ||
207 | /* XXX uses secret knowledge of skiplist structure */ | |
208 | for (p = sl->header->forward[0]; p; p = p->forward[0]) { | |
209 | char kbuf[PREFIX_STRLEN]; | |
210 | char hbuf[PREFIX_STRLEN]; | |
211 | char ubuf[PREFIX_STRLEN]; | |
212 | ||
213 | pb = p->value; | |
214 | ||
215 | prefix2str(p->key, kbuf, sizeof(kbuf)); | |
216 | prefix2str(&pb->hpfx, hbuf, sizeof(hbuf)); | |
217 | prefix2str(&pb->upfx, ubuf, sizeof(ubuf)); | |
218 | ||
219 | vnc_zlog_debug_verbose( | |
220 | "RHN Entry %d (q=%p): kpfx=%s, upfx=%s, hpfx=%s, ubi=%p", | |
221 | ++count, p, kbuf, ubuf, hbuf, pb->ubi); | |
222 | } | |
223 | } | |
224 | #endif | |
225 | ||
226 | #ifdef ENABLE_VNC_RHNCK | |
227 | static void vnc_rhnck(char *tag) | |
228 | { | |
229 | struct bgp *bgp; | |
230 | struct skiplist *sl; | |
231 | struct skiplistnode *p; | |
232 | ||
233 | bgp = bgp_get_default(); | |
234 | if (!bgp) | |
235 | return; | |
236 | sl = bgp->rfapi->resolve_nve_nexthop; | |
237 | ||
238 | if (!sl) | |
239 | return; | |
240 | ||
241 | /* XXX uses secret knowledge of skiplist structure */ | |
242 | for (p = sl->header->forward[0]; p; p = p->forward[0]) { | |
243 | struct prefix_bag *pb; | |
244 | struct prefix *pkey; | |
245 | afi_t afi; | |
246 | struct prefix pfx_orig_nexthop; | |
247 | ||
248 | memset(&pfx_orig_nexthop, 0, | |
249 | sizeof(struct prefix)); /* keep valgrind happy */ | |
250 | ||
251 | pkey = p->key; | |
252 | pb = p->value; | |
253 | ||
254 | afi = family2afi(pb->upfx.family); | |
255 | ||
256 | rfapiUnicastNexthop2Prefix(afi, pb->ubi->attr, | |
257 | &pfx_orig_nexthop); | |
258 | ||
259 | /* pb->hpfx, pb->ubi nexthop, pkey should all reflect the same | |
260 | * pfx */ | |
261 | assert(!vnc_prefix_cmp(&pb->hpfx, pkey)); | |
262 | if (vnc_prefix_cmp(&pb->hpfx, &pfx_orig_nexthop)) { | |
263 | char str_onh[PREFIX_STRLEN]; | |
264 | char str_nve_pfx[PREFIX_STRLEN]; | |
265 | ||
266 | prefix2str(&pfx_orig_nexthop, str_onh, sizeof(str_onh)); | |
267 | prefix2str(&pb->hpfx, str_nve_pfx, sizeof(str_nve_pfx)); | |
268 | ||
269 | vnc_zlog_debug_verbose( | |
270 | "%s: %s: FATAL: resolve_nve_nexthop list item bi nexthop %s != nve pfx %s", | |
271 | __func__, tag, str_onh, str_nve_pfx); | |
272 | assert(0); | |
273 | } | |
274 | } | |
275 | vnc_zlog_debug_verbose("%s: vnc_rhnck OK", tag); | |
276 | } | |
277 | ||
278 | #define VNC_RHNCK(n) do {char buf[BUFSIZ];sprintf(buf,"%s: %s", __func__, #n);vnc_rhnck(buf);} while (0) | |
279 | ||
280 | #else | |
281 | ||
282 | #define VNC_RHNCK(n) | |
283 | ||
284 | #endif | |
285 | ||
286 | /*********************************************************************** | |
287 | * Add/Delete Unicast Route | |
288 | ***********************************************************************/ | |
289 | ||
290 | /* | |
291 | * "Adding a Route" import process | |
292 | */ | |
293 | ||
294 | /* | |
295 | * extract and package information from the BGP unicast route. | |
296 | * Return code 0 means OK, non-0 means drop. | |
297 | * | |
298 | * If return code is 0, caller MUST release ecom | |
299 | */ | |
300 | static int process_unicast_route(struct bgp *bgp, /* in */ | |
301 | afi_t afi, /* in */ | |
302 | struct prefix *prefix, /* in */ | |
303 | struct bgp_info *info, /* in */ | |
304 | struct ecommunity **ecom, /* OUT */ | |
305 | struct prefix *unicast_nexthop) /* OUT */ | |
306 | { | |
307 | struct rfapi_cfg *hc = bgp->rfapi_cfg; | |
308 | struct peer *peer = info->peer; | |
309 | struct attr *attr = info->attr; | |
310 | struct attr hattr; | |
311 | struct route_map *rmap = NULL; | |
312 | struct prefix pfx_orig_nexthop; | |
313 | ||
314 | memset(&pfx_orig_nexthop, 0, | |
315 | sizeof(struct prefix)); /* keep valgrind happy */ | |
316 | ||
317 | /* | |
318 | * prefix list check | |
319 | */ | |
320 | if (hc->plist_redist[ZEBRA_ROUTE_BGP_DIRECT][afi]) { | |
321 | vnc_zlog_debug_verbose("%s: HC prefix list is set, checking", | |
322 | __func__); | |
323 | if (prefix_list_apply( | |
324 | hc->plist_redist[ZEBRA_ROUTE_BGP_DIRECT][afi], | |
325 | prefix) | |
326 | == PREFIX_DENY) { | |
327 | vnc_zlog_debug_verbose( | |
328 | "%s: prefix list returns DENY, blocking route", | |
329 | __func__); | |
330 | return -1; | |
331 | } | |
332 | vnc_zlog_debug_verbose( | |
333 | "%s: prefix list returns PASS, allowing route", | |
334 | __func__); | |
335 | } | |
336 | ||
337 | /* apply routemap, if any, later */ | |
338 | rmap = hc->routemap_redist[ZEBRA_ROUTE_BGP_DIRECT]; | |
339 | ||
340 | /* | |
341 | * Extract original nexthop, which we expect to be a NVE connected | |
342 | * router | |
343 | * Note that this is the nexthop before any possible application of | |
344 | * policy | |
345 | */ | |
346 | /* | |
347 | * Incoming prefix is unicast. If v6, it is in multiprotocol area, | |
348 | * but if v4 it is in attr->nexthop | |
349 | */ | |
350 | rfapiUnicastNexthop2Prefix(afi, attr, &pfx_orig_nexthop); | |
351 | ||
352 | /* | |
353 | * route map handling | |
354 | * This code is here because it allocates an interned attr which | |
355 | * must be freed before we return. It's easier to put it after | |
356 | * all of the possible returns above. | |
357 | */ | |
358 | memset(&hattr, 0, sizeof(struct attr)); | |
359 | bgp_attr_dup(&hattr, attr); /* hattr becomes a ghost attr */ | |
360 | ||
361 | if (rmap) { | |
362 | struct bgp_info info; | |
363 | route_map_result_t ret; | |
364 | ||
365 | memset(&info, 0, sizeof(info)); | |
366 | info.peer = peer; | |
367 | info.attr = &hattr; | |
368 | ret = route_map_apply(rmap, prefix, RMAP_BGP, &info); | |
369 | if (ret == RMAP_DENYMATCH) { | |
370 | bgp_attr_flush(&hattr); | |
371 | vnc_zlog_debug_verbose( | |
372 | "%s: route map \"%s\" says DENY, returning", | |
373 | __func__, rmap->name); | |
374 | return -1; | |
375 | } | |
376 | } | |
377 | ||
378 | /* | |
379 | * Get the (possibly altered by policy) unicast nexthop | |
380 | * for later lookup in the Import Table by caller | |
381 | */ | |
382 | rfapiUnicastNexthop2Prefix(afi, &hattr, unicast_nexthop); | |
383 | ||
384 | if (hattr.ecommunity) | |
385 | *ecom = ecommunity_dup(hattr.ecommunity); | |
386 | else | |
387 | *ecom = ecommunity_new(); | |
388 | ||
389 | /* | |
390 | * Done with hattr, clean up | |
391 | */ | |
392 | bgp_attr_flush(&hattr); | |
393 | ||
394 | /* | |
395 | * Add EC that carries original NH of iBGP route (2 bytes = magic | |
396 | * value indicating it came from an VNC gateway; default 5226, but | |
397 | * must be user configurable). Note that this is the nexthop before | |
398 | * any application of policy. | |
399 | */ | |
400 | { | |
401 | struct ecommunity_val vnc_gateway_magic; | |
402 | uint16_t localadmin; | |
403 | ||
404 | /* Using route origin extended community type */ | |
405 | memset(&vnc_gateway_magic, 0, sizeof(vnc_gateway_magic)); | |
406 | vnc_gateway_magic.val[0] = 0x01; | |
407 | vnc_gateway_magic.val[1] = 0x03; | |
408 | ||
409 | /* Only works for IPv4 nexthops */ | |
410 | if (prefix->family == AF_INET) { | |
411 | memcpy(vnc_gateway_magic.val + 2, | |
412 | &unicast_nexthop->u.prefix4, 4); | |
413 | } | |
414 | localadmin = htons(hc->resolve_nve_roo_local_admin); | |
415 | memcpy(vnc_gateway_magic.val + 6, (char *)&localadmin, 2); | |
416 | ||
417 | ecommunity_add_val(*ecom, &vnc_gateway_magic); | |
418 | } | |
419 | ||
420 | return 0; | |
421 | } | |
422 | ||
423 | ||
424 | static void vnc_import_bgp_add_route_mode_resolve_nve_one_bi( | |
425 | struct bgp *bgp, afi_t afi, struct bgp_info *bi, /* VPN bi */ | |
426 | struct prefix_rd *prd, /* RD */ | |
427 | struct prefix *prefix, /* unicast route prefix */ | |
428 | uint32_t *local_pref, /* NULL = no local_pref */ | |
429 | uint32_t *med, /* NULL = no med */ | |
430 | struct ecommunity *ecom) /* generated ecoms */ | |
431 | { | |
432 | struct prefix un; | |
433 | struct prefix nexthop; | |
434 | struct rfapi_ip_addr nexthop_h; | |
435 | uint32_t lifetime; | |
436 | uint32_t *plifetime; | |
437 | struct bgp_attr_encap_subtlv *encaptlvs; | |
438 | uint32_t label = 0; | |
439 | ||
440 | struct rfapi_un_option optary[3]; | |
441 | struct rfapi_un_option *opt = NULL; | |
442 | int cur_opt = 0; | |
443 | ||
444 | vnc_zlog_debug_verbose("%s: entry", __func__); | |
445 | ||
446 | if (bi->type != ZEBRA_ROUTE_BGP && bi->type != ZEBRA_ROUTE_BGP_DIRECT) { | |
447 | ||
448 | return; | |
449 | } | |
450 | if (bi->sub_type != BGP_ROUTE_NORMAL && bi->sub_type != BGP_ROUTE_STATIC | |
451 | && bi->sub_type != BGP_ROUTE_RFP) { | |
452 | ||
453 | return; | |
454 | } | |
455 | if (CHECK_FLAG(bi->flags, BGP_INFO_REMOVED)) | |
456 | return; | |
457 | ||
458 | vncHDResolveNve.peer = bi->peer; | |
459 | if (!rfapiGetVncTunnelUnAddr(bi->attr, &un)) { | |
460 | if (rfapiQprefix2Raddr(&un, &vncHDResolveNve.un_addr)) | |
461 | return; | |
462 | } else { | |
463 | memset(&vncHDResolveNve.un_addr, 0, | |
464 | sizeof(vncHDResolveNve.un_addr)); | |
465 | } | |
466 | ||
467 | /* Use nexthop of VPN route as nexthop of constructed route */ | |
468 | rfapiNexthop2Prefix(bi->attr, &nexthop); | |
469 | rfapiQprefix2Raddr(&nexthop, &nexthop_h); | |
470 | ||
471 | if (rfapiGetVncLifetime(bi->attr, &lifetime)) { | |
472 | plifetime = NULL; | |
473 | } else { | |
474 | plifetime = &lifetime; | |
475 | } | |
476 | ||
477 | if (bi->attr) { | |
478 | encaptlvs = bi->attr->vnc_subtlvs; | |
479 | if (bi->attr->encap_tunneltype != BGP_ENCAP_TYPE_RESERVED | |
480 | && bi->attr->encap_tunneltype != BGP_ENCAP_TYPE_MPLS) { | |
481 | if (opt != NULL) | |
482 | opt->next = &optary[cur_opt]; | |
483 | opt = &optary[cur_opt++]; | |
484 | memset(opt, 0, sizeof(struct rfapi_un_option)); | |
485 | opt->type = RFAPI_UN_OPTION_TYPE_TUNNELTYPE; | |
486 | opt->v.tunnel.type = bi->attr->encap_tunneltype; | |
487 | /* TBD parse bi->attr->extra->encap_subtlvs */ | |
488 | } | |
489 | } else { | |
490 | encaptlvs = NULL; | |
491 | } | |
492 | ||
493 | struct ecommunity *new_ecom = ecommunity_dup(ecom); | |
494 | ||
495 | if (bi->attr && bi->attr->ecommunity) | |
496 | ecommunity_merge(new_ecom, bi->attr->ecommunity); | |
497 | ||
498 | if (bi->extra) | |
499 | label = decode_label(&bi->extra->label[0]); | |
500 | ||
501 | add_vnc_route(&vncHDResolveNve, bgp, SAFI_MPLS_VPN, | |
502 | prefix, /* unicast route prefix */ | |
503 | prd, &nexthop_h, /* new nexthop */ | |
504 | local_pref, plifetime, | |
505 | (struct bgp_tea_options *)encaptlvs, /* RFP options */ | |
506 | opt, NULL, new_ecom, med, /* NULL => don't set med */ | |
507 | (label ? &label : NULL), /* NULL= default */ | |
508 | ZEBRA_ROUTE_BGP_DIRECT, BGP_ROUTE_REDISTRIBUTE, | |
509 | RFAPI_AHR_RFPOPT_IS_VNCTLV); /* flags */ | |
510 | ||
511 | ecommunity_free(&new_ecom); | |
512 | } | |
513 | ||
514 | static void vnc_import_bgp_add_route_mode_resolve_nve_one_rd( | |
515 | struct prefix_rd *prd, /* RD */ | |
516 | struct bgp_table *table_rd, /* per-rd VPN route table */ | |
517 | afi_t afi, struct bgp *bgp, struct prefix *prefix, /* unicast prefix */ | |
518 | struct ecommunity *ecom, /* generated ecoms */ | |
519 | uint32_t *local_pref, /* NULL = no local_pref */ | |
520 | uint32_t *med, /* NULL = no med */ | |
521 | struct prefix *ubi_nexthop) /* unicast nexthop */ | |
522 | { | |
523 | struct bgp_node *bn; | |
524 | struct bgp_info *bi; | |
525 | ||
526 | if (!table_rd) | |
527 | return; | |
528 | ||
529 | { | |
530 | char str_nh[PREFIX_STRLEN]; | |
531 | ||
532 | prefix2str(ubi_nexthop, str_nh, sizeof(str_nh)); | |
533 | ||
534 | vnc_zlog_debug_verbose("%s: ubi_nexthop=%s", __func__, str_nh); | |
535 | } | |
536 | ||
537 | /* exact match */ | |
538 | bn = bgp_node_lookup(table_rd, ubi_nexthop); | |
539 | if (!bn) { | |
540 | vnc_zlog_debug_verbose( | |
541 | "%s: no match in RD's table for ubi_nexthop", __func__); | |
542 | return; | |
543 | } | |
544 | ||
545 | /* Iterate over bgp_info items at this node */ | |
546 | for (bi = bn->info; bi; bi = bi->next) { | |
547 | ||
548 | vnc_import_bgp_add_route_mode_resolve_nve_one_bi( | |
549 | bgp, afi, bi, /* VPN bi */ | |
550 | prd, prefix, local_pref, med, ecom); | |
551 | } | |
552 | ||
553 | bgp_unlock_node(bn); | |
554 | } | |
555 | ||
556 | static void vnc_import_bgp_add_route_mode_resolve_nve( | |
557 | struct bgp *bgp, struct prefix *prefix, /* unicast prefix */ | |
558 | struct bgp_info *info) /* unicast info */ | |
559 | { | |
560 | afi_t afi = family2afi(prefix->family); | |
561 | ||
562 | struct prefix pfx_unicast_nexthop = {0}; /* happy valgrind */ | |
563 | ||
564 | struct ecommunity *ecom = NULL; | |
565 | uint32_t local_pref; | |
566 | uint32_t *med = NULL; | |
567 | ||
568 | struct prefix_bag *pb; | |
569 | struct bgp_node *bnp; /* prd table node */ | |
570 | ||
571 | /*debugging */ | |
572 | if (VNC_DEBUG(VERBOSE)) { | |
573 | char str_pfx[PREFIX_STRLEN]; | |
574 | char str_nh[PREFIX_STRLEN]; | |
575 | struct prefix nh; | |
576 | ||
577 | prefix2str(prefix, str_pfx, sizeof(str_pfx)); | |
578 | ||
579 | nh.prefixlen = 0; | |
580 | rfapiUnicastNexthop2Prefix(afi, info->attr, &nh); | |
581 | if (nh.prefixlen) { | |
582 | prefix2str(&nh, str_nh, sizeof(str_nh)); | |
583 | } else { | |
584 | str_nh[0] = '?'; | |
585 | str_nh[1] = 0; | |
586 | } | |
587 | ||
588 | vnc_zlog_debug_verbose( | |
589 | "%s(bgp=%p, unicast prefix=%s, unicast nh=%s)", | |
590 | __func__, bgp, str_pfx, str_nh); | |
591 | } | |
592 | ||
593 | if (info->type != ZEBRA_ROUTE_BGP) { | |
594 | vnc_zlog_debug_verbose( | |
595 | "%s: unicast type %d=\"%s\" is not %d=%s, skipping", | |
596 | __func__, info->type, zebra_route_string(info->type), | |
597 | ZEBRA_ROUTE_BGP, "ZEBRA_ROUTE_BGP"); | |
598 | return; | |
599 | } | |
600 | ||
601 | /* | |
602 | * Preliminary checks | |
603 | */ | |
604 | ||
605 | if (!afi) { | |
606 | flog_err(EC_LIB_DEVELOPMENT, "%s: can't get afi of prefix", | |
607 | __func__); | |
608 | return; | |
609 | } | |
610 | ||
611 | if (!(bgp->rfapi_cfg)) { | |
612 | vnc_zlog_debug_verbose("%s: bgp->rfapi_cfg is NULL, skipping", | |
613 | __func__); | |
614 | return; | |
615 | } | |
616 | ||
617 | /* check vnc redist flag for bgp direct routes */ | |
618 | if (!bgp->rfapi_cfg->redist[afi][ZEBRA_ROUTE_BGP_DIRECT]) { | |
619 | vnc_zlog_debug_verbose( | |
620 | "%s: bgp->rfapi_cfg->redist[afi=%d][type=ZEBRA_ROUTE_BGP_DIRECT] is 0, skipping", | |
621 | __func__, afi); | |
622 | return; | |
623 | } | |
624 | ||
625 | ||
626 | if (process_unicast_route(bgp, afi, prefix, info, &ecom, | |
627 | &pfx_unicast_nexthop)) { | |
628 | ||
629 | vnc_zlog_debug_verbose( | |
630 | "%s: process_unicast_route error, skipping", __func__); | |
631 | return; | |
632 | } | |
633 | ||
634 | local_pref = calc_local_pref(info->attr, info->peer); | |
635 | if (info->attr | |
636 | && (info->attr->flag & ATTR_FLAG_BIT(BGP_ATTR_MULTI_EXIT_DISC))) { | |
637 | ||
638 | med = &info->attr->med; | |
639 | } | |
640 | ||
641 | ||
642 | /* | |
643 | * At this point, we have allocated: | |
644 | * | |
645 | * ecom ecommunity ptr, union of unicast and ROO parts (no NVE part) | |
646 | * | |
647 | * And we have set: | |
648 | * | |
649 | * pfx_unicast_nexthop nexthop of uncast route | |
650 | */ | |
651 | ||
652 | if (!bgp->rfapi->resolve_nve_nexthop) { | |
653 | bgp->rfapi->resolve_nve_nexthop = | |
654 | skiplist_new(SKIPLIST_FLAG_ALLOW_DUPLICATES, | |
655 | vnc_prefix_cmp, prefix_bag_free); | |
656 | } | |
657 | ||
658 | pb = XCALLOC(MTYPE_RFAPI_PREFIX_BAG, sizeof(struct prefix_bag)); | |
659 | pb->hpfx = pfx_unicast_nexthop; | |
660 | pb->ubi = info; | |
661 | pb->upfx = *prefix; | |
662 | ||
663 | bgp_info_lock(info); /* skiplist refers to it */ | |
664 | skiplist_insert(bgp->rfapi->resolve_nve_nexthop, &pb->hpfx, pb); | |
665 | ||
666 | /* | |
667 | * Iterate over RDs in VPN RIB. For each RD, look up unicast nexthop | |
668 | * (exact match, /32). If an exact match is found, call add_vnc_route. | |
669 | */ | |
670 | ||
671 | for (bnp = bgp_table_top(bgp->rib[afi][SAFI_MPLS_VPN]); bnp; | |
672 | bnp = bgp_route_next(bnp)) { | |
673 | ||
674 | struct bgp_table *table; | |
675 | ||
676 | table = (struct bgp_table *)(bnp->info); | |
677 | ||
678 | if (!table) | |
679 | continue; | |
680 | ||
681 | vnc_import_bgp_add_route_mode_resolve_nve_one_rd( | |
682 | (struct prefix_rd *)&bnp->p, table, afi, bgp, prefix, | |
683 | ecom, &local_pref, med, &pfx_unicast_nexthop); | |
684 | } | |
685 | ||
686 | ||
687 | if (ecom) | |
688 | ecommunity_free(&ecom); | |
689 | ||
690 | vnc_zlog_debug_verbose("%s: done", __func__); | |
691 | } | |
692 | ||
693 | ||
694 | static void vnc_import_bgp_add_route_mode_plain(struct bgp *bgp, | |
695 | struct prefix *prefix, | |
696 | struct bgp_info *info) | |
697 | { | |
698 | afi_t afi = family2afi(prefix->family); | |
699 | struct peer *peer = info->peer; | |
700 | struct attr *attr = info->attr; | |
701 | struct attr hattr; | |
702 | struct rfapi_cfg *hc = bgp->rfapi_cfg; | |
703 | struct attr *iattr = NULL; | |
704 | ||
705 | struct rfapi_ip_addr vnaddr; | |
706 | struct prefix vn_pfx_space; | |
707 | struct prefix *vn_pfx = NULL; | |
708 | int ahr_flags = 0; | |
709 | struct ecommunity *ecom = NULL; | |
710 | struct prefix_rd prd; | |
711 | struct route_map *rmap = NULL; | |
712 | uint32_t local_pref; | |
713 | uint32_t *med = NULL; | |
714 | ||
715 | { | |
716 | char buf[PREFIX_STRLEN]; | |
717 | ||
718 | prefix2str(prefix, buf, sizeof(buf)); | |
719 | vnc_zlog_debug_verbose("%s(prefix=%s) entry", __func__, buf); | |
720 | } | |
721 | ||
722 | if (!afi) { | |
723 | flog_err(EC_LIB_DEVELOPMENT, "%s: can't get afi of prefix", | |
724 | __func__); | |
725 | return; | |
726 | } | |
727 | ||
728 | if (!hc) { | |
729 | vnc_zlog_debug_verbose("%s: bgp->rfapi_cfg is NULL, skipping", | |
730 | __func__); | |
731 | return; | |
732 | } | |
733 | ||
734 | /* check vnc redist flag for bgp direct routes */ | |
735 | if (!bgp->rfapi_cfg->redist[afi][ZEBRA_ROUTE_BGP_DIRECT]) { | |
736 | vnc_zlog_debug_verbose( | |
737 | "%s: bgp->rfapi_cfg->redist[afi=%d][type=ZEBRA_ROUTE_BGP_DIRECT] is 0, skipping", | |
738 | __func__, afi); | |
739 | return; | |
740 | } | |
741 | ||
742 | /* | |
743 | * mode "plain" specific code | |
744 | */ | |
745 | { | |
746 | vnc_zlog_debug_verbose("%s: NOT using redist RFG", __func__); | |
747 | ||
748 | /* | |
749 | * prefix list check | |
750 | */ | |
751 | if (hc->plist_redist[ZEBRA_ROUTE_BGP_DIRECT][afi]) { | |
752 | vnc_zlog_debug_verbose( | |
753 | "%s: HC prefix list is set, checking", | |
754 | __func__); | |
755 | if (prefix_list_apply( | |
756 | hc->plist_redist[ZEBRA_ROUTE_BGP_DIRECT] | |
757 | [afi], | |
758 | prefix) | |
759 | == PREFIX_DENY) { | |
760 | vnc_zlog_debug_verbose( | |
761 | "%s: prefix list returns DENY, blocking route", | |
762 | __func__); | |
763 | return; | |
764 | } | |
765 | vnc_zlog_debug_verbose( | |
766 | "%s: prefix list returns PASS, allowing route", | |
767 | __func__); | |
768 | } | |
769 | ||
770 | /* apply routemap, if any, later */ | |
771 | rmap = hc->routemap_redist[ZEBRA_ROUTE_BGP_DIRECT]; | |
772 | ||
773 | /* | |
774 | * Incoming prefix is unicast. If v6, it is in multiprotocol | |
775 | * area, | |
776 | * but if v4 it is in attr->nexthop | |
777 | */ | |
778 | rfapiUnicastNexthop2Prefix(afi, attr, &vn_pfx_space); | |
779 | vn_pfx = &vn_pfx_space; | |
780 | ||
781 | /* UN address */ | |
782 | ahr_flags |= RFAPI_AHR_NO_TUNNEL_SUBTLV; | |
783 | } | |
784 | ||
785 | if (VNC_DEBUG(IMPORT_BGP_ADD_ROUTE)) { | |
786 | char buf[PREFIX_STRLEN]; | |
787 | ||
788 | prefix2str(vn_pfx, buf, sizeof(buf)); | |
789 | vnc_zlog_debug_any("%s vn_pfx=%s", __func__, buf); | |
790 | } | |
791 | ||
792 | /* | |
793 | * Compute VN address | |
794 | */ | |
795 | if (rfapiQprefix2Raddr(vn_pfx, &vnaddr)) { | |
796 | vnc_zlog_debug_verbose("%s: redist VN invalid, skipping", | |
797 | __func__); | |
798 | return; | |
799 | } | |
800 | ||
801 | /* | |
802 | * route map handling | |
803 | * This code is here because it allocates an interned attr which | |
804 | * must be freed before we return. It's easier to put it after | |
805 | * all of the possible returns above. | |
806 | */ | |
807 | memset(&hattr, 0, sizeof(struct attr)); | |
808 | bgp_attr_dup(&hattr, attr); /* hattr becomes a ghost attr */ | |
809 | ||
810 | if (rmap) { | |
811 | struct bgp_info info; | |
812 | route_map_result_t ret; | |
813 | ||
814 | memset(&info, 0, sizeof(info)); | |
815 | info.peer = peer; | |
816 | info.attr = &hattr; | |
817 | ret = route_map_apply(rmap, prefix, RMAP_BGP, &info); | |
818 | if (ret == RMAP_DENYMATCH) { | |
819 | bgp_attr_flush(&hattr); | |
820 | vnc_zlog_debug_verbose( | |
821 | "%s: route map \"%s\" says DENY, returning", | |
822 | __func__, rmap->name); | |
823 | return; | |
824 | } | |
825 | } | |
826 | ||
827 | iattr = bgp_attr_intern(&hattr); | |
828 | bgp_attr_flush(&hattr); | |
829 | ||
830 | /* Now iattr is an allocated interned attr */ | |
831 | ||
832 | /* | |
833 | * Mode "plain" specific code | |
834 | * | |
835 | * Sets RD in dummy HD | |
836 | * Allocates ecom | |
837 | */ | |
838 | { | |
839 | if (vnaddr.addr_family != AF_INET) { | |
840 | vnc_zlog_debug_verbose( | |
841 | "%s: can't auto-assign RD, VN AF (%d) is not IPv4, skipping", | |
842 | __func__, vnaddr.addr_family); | |
843 | if (iattr) { | |
844 | bgp_attr_unintern(&iattr); | |
845 | } | |
846 | return; | |
847 | } | |
848 | memset(&prd, 0, sizeof(prd)); | |
849 | rfapi_set_autord_from_vn(&prd, &vnaddr); | |
850 | ||
851 | if (iattr && iattr->ecommunity) | |
852 | ecom = ecommunity_dup(iattr->ecommunity); | |
853 | } | |
854 | ||
855 | local_pref = calc_local_pref(iattr, peer); | |
856 | ||
857 | if (iattr && (iattr->flag & ATTR_FLAG_BIT(BGP_ATTR_MULTI_EXIT_DISC))) { | |
858 | med = &iattr->med; | |
859 | } | |
860 | ||
861 | if (VNC_DEBUG(IMPORT_BGP_ADD_ROUTE)) { | |
862 | char buf[PREFIX_STRLEN]; | |
863 | ||
864 | rfapiRfapiIpAddr2Str(&vnaddr, buf, sizeof(buf)); | |
865 | vnc_zlog_debug_any("%s: setting vnaddr to %s", __func__, buf); | |
866 | } | |
867 | ||
868 | vncHDBgpDirect.peer = peer; | |
869 | add_vnc_route(&vncHDBgpDirect, bgp, SAFI_MPLS_VPN, prefix, &prd, | |
870 | &vnaddr, &local_pref, &(bgp->rfapi_cfg->redist_lifetime), | |
871 | NULL, /* RFP options */ | |
872 | NULL, NULL, ecom, med, /* med */ | |
873 | NULL, /* label: default */ | |
874 | ZEBRA_ROUTE_BGP_DIRECT, BGP_ROUTE_REDISTRIBUTE, | |
875 | ahr_flags); | |
876 | vncHDBgpDirect.peer = NULL; | |
877 | ||
878 | if (ecom) | |
879 | ecommunity_free(&ecom); | |
880 | } | |
881 | ||
882 | static void | |
883 | vnc_import_bgp_add_route_mode_nvegroup(struct bgp *bgp, struct prefix *prefix, | |
884 | struct bgp_info *info, | |
885 | struct rfapi_nve_group_cfg *rfg) | |
886 | { | |
887 | afi_t afi = family2afi(prefix->family); | |
888 | struct peer *peer = info->peer; | |
889 | struct attr *attr = info->attr; | |
890 | struct attr hattr; | |
891 | struct attr *iattr = NULL; | |
892 | ||
893 | struct rfapi_ip_addr vnaddr; | |
894 | struct prefix *vn_pfx = NULL; | |
895 | int ahr_flags = 0; | |
896 | struct ecommunity *ecom = NULL; | |
897 | struct prefix_rd prd; | |
898 | struct route_map *rmap = NULL; | |
899 | uint32_t local_pref; | |
900 | ||
901 | { | |
902 | char buf[PREFIX_STRLEN]; | |
903 | ||
904 | prefix2str(prefix, buf, sizeof(buf)); | |
905 | vnc_zlog_debug_verbose("%s(prefix=%s) entry", __func__, buf); | |
906 | } | |
907 | ||
908 | assert(rfg); | |
909 | ||
910 | if (!afi) { | |
911 | flog_err(EC_LIB_DEVELOPMENT, "%s: can't get afi of prefix", | |
912 | __func__); | |
913 | return; | |
914 | } | |
915 | ||
916 | if (!(bgp->rfapi_cfg)) { | |
917 | vnc_zlog_debug_verbose("%s: bgp->rfapi_cfg is NULL, skipping", | |
918 | __func__); | |
919 | return; | |
920 | } | |
921 | ||
922 | /* check vnc redist flag for bgp direct routes */ | |
923 | if (!bgp->rfapi_cfg->redist[afi][ZEBRA_ROUTE_BGP_DIRECT]) { | |
924 | vnc_zlog_debug_verbose( | |
925 | "%s: bgp->rfapi_cfg->redist[afi=%d][type=ZEBRA_ROUTE_BGP_DIRECT] is 0, skipping", | |
926 | __func__, afi); | |
927 | return; | |
928 | } | |
929 | ||
930 | ||
931 | /* | |
932 | * RFG-specific code | |
933 | */ | |
934 | { | |
935 | ||
936 | struct rfapi_ip_prefix pfx_un; | |
937 | ||
938 | vnc_zlog_debug_verbose("%s: using redist RFG", __func__); | |
939 | ||
940 | /* | |
941 | * RFG prefix list check | |
942 | */ | |
943 | if (rfg->plist_redist[ZEBRA_ROUTE_BGP_DIRECT][afi]) { | |
944 | vnc_zlog_debug_verbose( | |
945 | "%s: RFG prefix list is set, checking", | |
946 | __func__); | |
947 | if (prefix_list_apply( | |
948 | rfg->plist_redist[ZEBRA_ROUTE_BGP_DIRECT] | |
949 | [afi], | |
950 | prefix) | |
951 | == PREFIX_DENY) { | |
952 | vnc_zlog_debug_verbose( | |
953 | "%s: prefix list returns DENY, blocking route", | |
954 | __func__); | |
955 | return; | |
956 | } | |
957 | vnc_zlog_debug_verbose( | |
958 | "%s: prefix list returns PASS, allowing route", | |
959 | __func__); | |
960 | } | |
961 | ||
962 | /* apply routemap, if any, later */ | |
963 | rmap = rfg->routemap_redist[ZEBRA_ROUTE_BGP_DIRECT]; | |
964 | ||
965 | /* | |
966 | * export nve group's VN addr prefix must be a /32 which | |
967 | * will yield the VN addr to use | |
968 | */ | |
969 | vn_pfx = &rfg->vn_prefix; | |
970 | ||
971 | /* | |
972 | * UN Address | |
973 | */ | |
974 | if (!is_host_prefix(&rfg->un_prefix)) { | |
975 | /* NB prefixlen==0 means it has not been configured */ | |
976 | vnc_zlog_debug_verbose( | |
977 | "%s: redist RFG UN pfx not host pfx (plen=%d), skipping", | |
978 | __func__, rfg->un_prefix.prefixlen); | |
979 | return; | |
980 | } | |
981 | ||
982 | rfapiQprefix2Rprefix(&rfg->un_prefix, &pfx_un); | |
983 | ||
984 | vncHDBgpDirect.un_addr = pfx_un.prefix; | |
985 | } | |
986 | ||
987 | if (VNC_DEBUG(IMPORT_BGP_ADD_ROUTE)) { | |
988 | char buf[PREFIX_STRLEN]; | |
989 | ||
990 | prefix2str(vn_pfx, buf, sizeof(buf)); | |
991 | vnc_zlog_debug_any("%s vn_pfx=%s", __func__, buf); | |
992 | } | |
993 | ||
994 | /* | |
995 | * Compute VN address | |
996 | */ | |
997 | if (rfapiQprefix2Raddr(vn_pfx, &vnaddr)) { | |
998 | vnc_zlog_debug_verbose("%s: redist VN invalid, skipping", | |
999 | __func__); | |
1000 | return; | |
1001 | } | |
1002 | ||
1003 | /* | |
1004 | * route map handling | |
1005 | * This code is here because it allocates an interned attr which | |
1006 | * must be freed before we return. It's easier to put it after | |
1007 | * all of the possible returns above. | |
1008 | */ | |
1009 | memset(&hattr, 0, sizeof(struct attr)); | |
1010 | bgp_attr_dup(&hattr, attr); /* hattr becomes a ghost attr */ | |
1011 | ||
1012 | if (rmap) { | |
1013 | struct bgp_info binfo; | |
1014 | route_map_result_t ret; | |
1015 | ||
1016 | memset(&binfo, 0, sizeof(binfo)); | |
1017 | binfo.peer = peer; | |
1018 | binfo.attr = &hattr; | |
1019 | ret = route_map_apply(rmap, prefix, RMAP_BGP, &binfo); | |
1020 | if (ret == RMAP_DENYMATCH) { | |
1021 | bgp_attr_flush(&hattr); | |
1022 | vnc_zlog_debug_verbose( | |
1023 | "%s: route map \"%s\" says DENY, returning", | |
1024 | __func__, rmap->name); | |
1025 | return; | |
1026 | } | |
1027 | } | |
1028 | ||
1029 | iattr = bgp_attr_intern(&hattr); | |
1030 | bgp_attr_flush(&hattr); | |
1031 | ||
1032 | /* Now iattr is an allocated interned attr */ | |
1033 | ||
1034 | /* | |
1035 | * RFG-specific code | |
1036 | * | |
1037 | * Sets RD in dummy HD | |
1038 | * Allocates ecom | |
1039 | */ | |
1040 | { | |
1041 | ||
1042 | memset(&prd, 0, sizeof(prd)); | |
1043 | prd = rfg->rd; | |
1044 | prd.family = AF_UNSPEC; | |
1045 | prd.prefixlen = 64; | |
1046 | ||
1047 | if (rfg->rd.family == AF_UNIX) { | |
1048 | rfapi_set_autord_from_vn(&prd, &vnaddr); | |
1049 | } | |
1050 | ||
1051 | if (rfg->rt_export_list) | |
1052 | ecom = ecommunity_dup( | |
1053 | bgp->rfapi_cfg->rfg_redist->rt_export_list); | |
1054 | else | |
1055 | ecom = ecommunity_new(); | |
1056 | ||
1057 | if (iattr && iattr->ecommunity) | |
1058 | ecom = ecommunity_merge(ecom, iattr->ecommunity); | |
1059 | } | |
1060 | ||
1061 | local_pref = calc_local_pref(iattr, peer); | |
1062 | ||
1063 | if (VNC_DEBUG(IMPORT_BGP_ADD_ROUTE)) { | |
1064 | char buf[BUFSIZ]; | |
1065 | ||
1066 | buf[0] = 0; | |
1067 | rfapiRfapiIpAddr2Str(&vnaddr, buf, BUFSIZ); | |
1068 | buf[BUFSIZ - 1] = 0; | |
1069 | vnc_zlog_debug_any("%s: setting vnaddr to %s", __func__, buf); | |
1070 | } | |
1071 | ||
1072 | vncHDBgpDirect.peer = peer; | |
1073 | add_vnc_route(&vncHDBgpDirect, bgp, SAFI_MPLS_VPN, prefix, &prd, | |
1074 | &vnaddr, &local_pref, &(bgp->rfapi_cfg->redist_lifetime), | |
1075 | NULL, /* RFP options */ | |
1076 | NULL, NULL, ecom, NULL, /* med */ | |
1077 | NULL, /* label: default */ | |
1078 | ZEBRA_ROUTE_BGP_DIRECT, BGP_ROUTE_REDISTRIBUTE, | |
1079 | ahr_flags); | |
1080 | vncHDBgpDirect.peer = NULL; | |
1081 | ||
1082 | if (ecom) | |
1083 | ecommunity_free(&ecom); | |
1084 | } | |
1085 | ||
1086 | static void vnc_import_bgp_del_route_mode_plain(struct bgp *bgp, | |
1087 | struct prefix *prefix, | |
1088 | struct bgp_info *info) | |
1089 | { | |
1090 | struct prefix_rd prd; | |
1091 | afi_t afi = family2afi(prefix->family); | |
1092 | struct prefix *vn_pfx = NULL; | |
1093 | struct rfapi_ip_addr vnaddr; | |
1094 | struct prefix vn_pfx_space; | |
1095 | ||
1096 | ||
1097 | assert(afi); | |
1098 | ||
1099 | /* | |
1100 | * Compute VN address | |
1101 | */ | |
1102 | ||
1103 | if (info && info->attr) { | |
1104 | rfapiUnicastNexthop2Prefix(afi, info->attr, &vn_pfx_space); | |
1105 | } else { | |
1106 | vnc_zlog_debug_verbose("%s: no attr, can't delete route", | |
1107 | __func__); | |
1108 | return; | |
1109 | } | |
1110 | vn_pfx = &vn_pfx_space; | |
1111 | ||
1112 | vnaddr.addr_family = vn_pfx->family; | |
1113 | switch (vn_pfx->family) { | |
1114 | case AF_INET: | |
1115 | if (vn_pfx->prefixlen != 32) { | |
1116 | vnc_zlog_debug_verbose( | |
1117 | "%s: redist VN plen (%d) != 32, skipping", | |
1118 | __func__, vn_pfx->prefixlen); | |
1119 | return; | |
1120 | } | |
1121 | vnaddr.addr.v4 = vn_pfx->u.prefix4; | |
1122 | break; | |
1123 | ||
1124 | case AF_INET6: | |
1125 | if (vn_pfx->prefixlen != 128) { | |
1126 | vnc_zlog_debug_verbose( | |
1127 | "%s: redist VN plen (%d) != 128, skipping", | |
1128 | __func__, vn_pfx->prefixlen); | |
1129 | return; | |
1130 | } | |
1131 | vnaddr.addr.v6 = vn_pfx->u.prefix6; | |
1132 | break; | |
1133 | ||
1134 | default: | |
1135 | vnc_zlog_debug_verbose( | |
1136 | "%s: no redist RFG VN host pfx configured, skipping", | |
1137 | __func__); | |
1138 | return; | |
1139 | } | |
1140 | ||
1141 | ||
1142 | memset(&prd, 0, sizeof(prd)); | |
1143 | if (rfapi_set_autord_from_vn(&prd, &vnaddr)) { | |
1144 | vnc_zlog_debug_verbose("%s: can't auto-assign RD, skipping", | |
1145 | __func__); | |
1146 | return; | |
1147 | } | |
1148 | ||
1149 | vncHDBgpDirect.peer = info->peer; | |
1150 | vnc_zlog_debug_verbose("%s: setting peer to %p", __func__, | |
1151 | vncHDBgpDirect.peer); | |
1152 | del_vnc_route(&vncHDBgpDirect, info->peer, bgp, SAFI_MPLS_VPN, prefix, | |
1153 | &prd, ZEBRA_ROUTE_BGP_DIRECT, BGP_ROUTE_REDISTRIBUTE, | |
1154 | NULL, 1); | |
1155 | ||
1156 | vncHDBgpDirect.peer = NULL; | |
1157 | } | |
1158 | ||
1159 | static void vnc_import_bgp_del_route_mode_nvegroup(struct bgp *bgp, | |
1160 | struct prefix *prefix, | |
1161 | struct bgp_info *info) | |
1162 | { | |
1163 | struct prefix_rd prd; | |
1164 | afi_t afi = family2afi(prefix->family); | |
1165 | struct rfapi_nve_group_cfg *rfg = NULL; | |
1166 | struct prefix *vn_pfx = NULL; | |
1167 | struct rfapi_ip_addr vnaddr; | |
1168 | ||
1169 | ||
1170 | assert(afi); | |
1171 | ||
1172 | rfg = bgp->rfapi_cfg->rfg_redist; | |
1173 | assert(rfg); | |
1174 | ||
1175 | /* | |
1176 | * Compute VN address | |
1177 | */ | |
1178 | ||
1179 | /* | |
1180 | * export nve group's VN addr prefix must be a /32 which | |
1181 | * will yield the VN addr to use | |
1182 | */ | |
1183 | vn_pfx = &rfg->vn_prefix; | |
1184 | ||
1185 | ||
1186 | vnaddr.addr_family = vn_pfx->family; | |
1187 | switch (vn_pfx->family) { | |
1188 | case AF_INET: | |
1189 | if (vn_pfx->prefixlen != 32) { | |
1190 | vnc_zlog_debug_verbose( | |
1191 | "%s: redist VN plen (%d) != 32, skipping", | |
1192 | __func__, vn_pfx->prefixlen); | |
1193 | return; | |
1194 | } | |
1195 | vnaddr.addr.v4 = vn_pfx->u.prefix4; | |
1196 | break; | |
1197 | ||
1198 | case AF_INET6: | |
1199 | if (vn_pfx->prefixlen != 128) { | |
1200 | vnc_zlog_debug_verbose( | |
1201 | "%s: redist VN plen (%d) != 128, skipping", | |
1202 | __func__, vn_pfx->prefixlen); | |
1203 | return; | |
1204 | } | |
1205 | vnaddr.addr.v6 = vn_pfx->u.prefix6; | |
1206 | break; | |
1207 | ||
1208 | default: | |
1209 | vnc_zlog_debug_verbose( | |
1210 | "%s: no redist RFG VN host pfx configured, skipping", | |
1211 | __func__); | |
1212 | return; | |
1213 | } | |
1214 | ||
1215 | memset(&prd, 0, sizeof(prd)); | |
1216 | prd = rfg->rd; | |
1217 | prd.family = AF_UNSPEC; | |
1218 | prd.prefixlen = 64; | |
1219 | ||
1220 | if (rfg->rd.family == AF_UNIX) { | |
1221 | /* means "auto" with VN addr */ | |
1222 | if (rfapi_set_autord_from_vn(&prd, &vnaddr)) { | |
1223 | vnc_zlog_debug_verbose( | |
1224 | "%s: can't auto-assign RD, skipping", __func__); | |
1225 | return; | |
1226 | } | |
1227 | } | |
1228 | ||
1229 | ||
1230 | vncHDBgpDirect.peer = info->peer; | |
1231 | vnc_zlog_debug_verbose("%s: setting peer to %p", __func__, | |
1232 | vncHDBgpDirect.peer); | |
1233 | del_vnc_route(&vncHDBgpDirect, info->peer, bgp, SAFI_MPLS_VPN, prefix, | |
1234 | &prd, ZEBRA_ROUTE_BGP_DIRECT, BGP_ROUTE_REDISTRIBUTE, | |
1235 | NULL, 1); | |
1236 | ||
1237 | vncHDBgpDirect.peer = NULL; | |
1238 | } | |
1239 | ||
1240 | static void vnc_import_bgp_del_route_mode_resolve_nve_one_bi( | |
1241 | struct bgp *bgp, afi_t afi, struct bgp_info *bi, /* VPN bi */ | |
1242 | struct prefix_rd *prd, /* RD */ | |
1243 | struct prefix *prefix) /* unicast route prefix */ | |
1244 | { | |
1245 | struct prefix un; | |
1246 | ||
1247 | if (bi->type != ZEBRA_ROUTE_BGP && bi->type != ZEBRA_ROUTE_BGP_DIRECT) { | |
1248 | ||
1249 | return; | |
1250 | } | |
1251 | if (bi->sub_type != BGP_ROUTE_NORMAL && bi->sub_type != BGP_ROUTE_STATIC | |
1252 | && bi->sub_type != BGP_ROUTE_RFP) { | |
1253 | ||
1254 | return; | |
1255 | } | |
1256 | if (CHECK_FLAG(bi->flags, BGP_INFO_REMOVED)) | |
1257 | return; | |
1258 | ||
1259 | vncHDResolveNve.peer = bi->peer; | |
1260 | if (!rfapiGetVncTunnelUnAddr(bi->attr, &un)) { | |
1261 | if (rfapiQprefix2Raddr(&un, &vncHDResolveNve.un_addr)) | |
1262 | return; | |
1263 | } else { | |
1264 | memset(&vncHDResolveNve.un_addr, 0, | |
1265 | sizeof(vncHDResolveNve.un_addr)); | |
1266 | } | |
1267 | ||
1268 | del_vnc_route(&vncHDResolveNve, vncHDResolveNve.peer, bgp, | |
1269 | SAFI_MPLS_VPN, prefix, /* unicast route prefix */ | |
1270 | prd, ZEBRA_ROUTE_BGP_DIRECT, BGP_ROUTE_REDISTRIBUTE, NULL, | |
1271 | 0); /* flags */ | |
1272 | } | |
1273 | ||
1274 | static void vnc_import_bgp_del_route_mode_resolve_nve_one_rd( | |
1275 | struct prefix_rd *prd, | |
1276 | struct bgp_table *table_rd, /* per-rd VPN route table */ | |
1277 | afi_t afi, struct bgp *bgp, struct prefix *prefix, /* unicast prefix */ | |
1278 | struct prefix *ubi_nexthop) /* unicast bi's nexthop */ | |
1279 | { | |
1280 | struct bgp_node *bn; | |
1281 | struct bgp_info *bi; | |
1282 | ||
1283 | if (!table_rd) | |
1284 | return; | |
1285 | ||
1286 | { | |
1287 | char str_nh[PREFIX_STRLEN]; | |
1288 | ||
1289 | prefix2str(ubi_nexthop, str_nh, sizeof(str_nh)); | |
1290 | vnc_zlog_debug_verbose("%s: ubi_nexthop=%s", __func__, str_nh); | |
1291 | } | |
1292 | ||
1293 | ||
1294 | /* exact match */ | |
1295 | bn = bgp_node_lookup(table_rd, ubi_nexthop); | |
1296 | if (!bn) { | |
1297 | vnc_zlog_debug_verbose( | |
1298 | "%s: no match in RD's table for ubi_nexthop", __func__); | |
1299 | return; | |
1300 | } | |
1301 | ||
1302 | /* Iterate over bgp_info items at this node */ | |
1303 | for (bi = bn->info; bi; bi = bi->next) { | |
1304 | ||
1305 | vnc_import_bgp_del_route_mode_resolve_nve_one_bi( | |
1306 | bgp, afi, bi, /* VPN bi */ | |
1307 | prd, /* VPN RD */ | |
1308 | prefix); /* unicast route prefix */ | |
1309 | } | |
1310 | ||
1311 | bgp_unlock_node(bn); | |
1312 | } | |
1313 | ||
1314 | static void vnc_import_bgp_del_route_mode_resolve_nve(struct bgp *bgp, | |
1315 | afi_t afi, | |
1316 | struct prefix *prefix, | |
1317 | struct bgp_info *info) | |
1318 | { | |
1319 | struct ecommunity *ecom = NULL; | |
1320 | struct prefix pfx_unicast_nexthop = {0}; /* happy valgrind */ | |
1321 | ||
1322 | // struct listnode *hnode; | |
1323 | // struct rfapi_descriptor *rfd; | |
1324 | struct prefix_bag *pb; | |
1325 | void *cursor; | |
1326 | struct skiplist *sl = bgp->rfapi->resolve_nve_nexthop; | |
1327 | int rc; | |
1328 | struct bgp_node *bnp; /* prd table node */ | |
1329 | ||
1330 | if (!sl) { | |
1331 | vnc_zlog_debug_verbose("%s: no RHN entries, skipping", | |
1332 | __func__); | |
1333 | return; | |
1334 | } | |
1335 | ||
1336 | if (info->type != ZEBRA_ROUTE_BGP) { | |
1337 | vnc_zlog_debug_verbose( | |
1338 | "%s: unicast type %d=\"%s\" is not %d=%s, skipping", | |
1339 | __func__, info->type, zebra_route_string(info->type), | |
1340 | ZEBRA_ROUTE_BGP, "ZEBRA_ROUTE_BGP"); | |
1341 | return; | |
1342 | } | |
1343 | ||
1344 | if (process_unicast_route(bgp, afi, prefix, info, &ecom, | |
1345 | &pfx_unicast_nexthop)) { | |
1346 | ||
1347 | vnc_zlog_debug_verbose( | |
1348 | "%s: process_unicast_route error, skipping", __func__); | |
1349 | return; | |
1350 | } | |
1351 | ||
1352 | rc = skiplist_first_value(sl, &pfx_unicast_nexthop, (void *)&pb, | |
1353 | &cursor); | |
1354 | while (!rc) { | |
1355 | if (pb->ubi == info) { | |
1356 | skiplist_delete(sl, &pfx_unicast_nexthop, pb); | |
1357 | bgp_info_unlock(info); | |
1358 | break; | |
1359 | } | |
1360 | rc = skiplist_next_value(sl, &pfx_unicast_nexthop, (void *)&pb, | |
1361 | &cursor); | |
1362 | } | |
1363 | ||
1364 | /* | |
1365 | * Iterate over RDs in VPN RIB. For each RD, look up unicast nexthop | |
1366 | * (exact match, /32). If an exact match is found, call add_vnc_route. | |
1367 | */ | |
1368 | ||
1369 | for (bnp = bgp_table_top(bgp->rib[afi][SAFI_MPLS_VPN]); bnp; | |
1370 | bnp = bgp_route_next(bnp)) { | |
1371 | ||
1372 | struct bgp_table *table; | |
1373 | ||
1374 | table = (struct bgp_table *)(bnp->info); | |
1375 | ||
1376 | if (!table) | |
1377 | continue; | |
1378 | ||
1379 | vnc_import_bgp_del_route_mode_resolve_nve_one_rd( | |
1380 | (struct prefix_rd *)&bnp->p, table, afi, bgp, prefix, | |
1381 | &pfx_unicast_nexthop); /* TBD how is this set? */ | |
1382 | } | |
1383 | ||
1384 | if (ecom) | |
1385 | ecommunity_free(&ecom); | |
1386 | } | |
1387 | ||
1388 | ||
1389 | /*********************************************************************** | |
1390 | * Add/Delete CE->NVE routes | |
1391 | ***********************************************************************/ | |
1392 | ||
1393 | /* | |
1394 | * Should be called whan a bi is added to VPN RIB. This function | |
1395 | * will check if it is a host route and return immediately if not. | |
1396 | */ | |
1397 | void vnc_import_bgp_add_vnc_host_route_mode_resolve_nve( | |
1398 | struct bgp *bgp, struct prefix_rd *prd, /* RD */ | |
1399 | struct bgp_table *table_rd, /* per-rd VPN route table */ | |
1400 | struct prefix *prefix, /* VPN prefix */ | |
1401 | struct bgp_info *bi) /* new VPN host route */ | |
1402 | { | |
1403 | afi_t afi = family2afi(prefix->family); | |
1404 | struct skiplist *sl = NULL; | |
1405 | int rc; | |
1406 | struct prefix_bag *pb; | |
1407 | void *cursor; | |
1408 | struct rfapi_cfg *hc = NULL; | |
1409 | ||
1410 | vnc_zlog_debug_verbose("%s: entry", __func__); | |
1411 | ||
1412 | if (afi != AFI_IP && afi != AFI_IP6) { | |
1413 | vnc_zlog_debug_verbose("%s: bad afi %d, skipping", __func__, | |
1414 | afi); | |
1415 | return; | |
1416 | } | |
1417 | ||
1418 | if (!(hc = bgp->rfapi_cfg)) { | |
1419 | vnc_zlog_debug_verbose("%s: bgp->rfapi_cfg is NULL, skipping", | |
1420 | __func__); | |
1421 | return; | |
1422 | } | |
1423 | ||
1424 | /* check vnc redist flag for bgp direct routes */ | |
1425 | if (!hc->redist[afi][ZEBRA_ROUTE_BGP_DIRECT]) { | |
1426 | vnc_zlog_debug_verbose( | |
1427 | "%s: bgp->rfapi_cfg->redist[afi=%d][type=ZEBRA_ROUTE_BGP_DIRECT] is 0, skipping", | |
1428 | __func__, afi); | |
1429 | return; | |
1430 | } | |
1431 | ||
1432 | if (hc->redist_mode != VNC_REDIST_MODE_RESOLVE_NVE) { | |
1433 | vnc_zlog_debug_verbose("%s: not in resolve-nve mode, skipping", | |
1434 | __func__); | |
1435 | return; | |
1436 | } | |
1437 | ||
1438 | if (bgp->rfapi) | |
1439 | sl = bgp->rfapi->resolve_nve_nexthop; | |
1440 | ||
1441 | if (!sl) { | |
1442 | vnc_zlog_debug_verbose( | |
1443 | "%s: no resolve_nve_nexthop skiplist, skipping", | |
1444 | __func__); | |
1445 | return; | |
1446 | } | |
1447 | ||
1448 | if (!is_host_prefix(prefix)) { | |
1449 | vnc_zlog_debug_verbose("%s: not host prefix, skipping", | |
1450 | __func__); | |
1451 | return; | |
1452 | } | |
1453 | ||
1454 | rc = skiplist_first_value(sl, prefix, (void *)&pb, &cursor); | |
1455 | while (!rc) { | |
1456 | struct ecommunity *ecom; | |
1457 | struct prefix pfx_unicast_nexthop; | |
1458 | uint32_t *med = NULL; | |
1459 | uint32_t local_pref; | |
1460 | ||
1461 | memset(&pfx_unicast_nexthop, 0, | |
1462 | sizeof(struct prefix)); /* keep valgrind happy */ | |
1463 | ||
1464 | if (VNC_DEBUG(IMPORT_BGP_ADD_ROUTE)) { | |
1465 | char hbuf[PREFIX_STRLEN]; | |
1466 | char ubuf[PREFIX_STRLEN]; | |
1467 | ||
1468 | prefix2str(&pb->hpfx, hbuf, sizeof(hbuf)); | |
1469 | prefix2str(&pb->upfx, ubuf, sizeof(ubuf)); | |
1470 | ||
1471 | vnc_zlog_debug_any( | |
1472 | "%s: examining RHN Entry (q=%p): upfx=%s, hpfx=%s, ubi=%p", | |
1473 | __func__, cursor, ubuf, hbuf, pb->ubi); | |
1474 | } | |
1475 | ||
1476 | if (process_unicast_route(bgp, afi, &pb->upfx, pb->ubi, &ecom, | |
1477 | &pfx_unicast_nexthop)) { | |
1478 | ||
1479 | vnc_zlog_debug_verbose( | |
1480 | "%s: process_unicast_route error, skipping", | |
1481 | __func__); | |
1482 | continue; | |
1483 | } | |
1484 | local_pref = calc_local_pref(pb->ubi->attr, pb->ubi->peer); | |
1485 | ||
1486 | if (pb->ubi->attr | |
1487 | && (pb->ubi->attr->flag | |
1488 | & ATTR_FLAG_BIT(BGP_ATTR_MULTI_EXIT_DISC))) { | |
1489 | ||
1490 | med = &pb->ubi->attr->med; | |
1491 | } | |
1492 | ||
1493 | /* | |
1494 | * Sanity check | |
1495 | */ | |
1496 | if (vnc_prefix_cmp(&pfx_unicast_nexthop, prefix)) { | |
1497 | char str_unh[PREFIX_STRLEN]; | |
1498 | char str_nve_pfx[PREFIX_STRLEN]; | |
1499 | ||
1500 | prefix2str(&pfx_unicast_nexthop, str_unh, | |
1501 | sizeof(str_unh)); | |
1502 | prefix2str(prefix, str_nve_pfx, sizeof(str_nve_pfx)); | |
1503 | ||
1504 | vnc_zlog_debug_verbose( | |
1505 | "%s: FATAL: resolve_nve_nexthop list item bi nexthop %s != nve pfx %s", | |
1506 | __func__, str_unh, str_nve_pfx); | |
1507 | assert(0); | |
1508 | } | |
1509 | ||
1510 | vnc_import_bgp_add_route_mode_resolve_nve_one_bi( | |
1511 | bgp, afi, bi, /* VPN bi */ | |
1512 | prd, &pb->upfx, /* unicast prefix */ | |
1513 | &local_pref, med, ecom); | |
1514 | ||
1515 | if (ecom) | |
1516 | ecommunity_free(&ecom); | |
1517 | ||
1518 | #if DEBUG_RHN_LIST | |
1519 | /* debug */ | |
1520 | { | |
1521 | char pbuf[PREFIX_STRLEN]; | |
1522 | ||
1523 | prefix2str(prefix, pbuf, sizeof(pbuf)); | |
1524 | ||
1525 | vnc_zlog_debug_verbose( | |
1526 | "%s: advancing past RHN Entry (q=%p): with prefix %s", | |
1527 | __func__, cursor, pbuf); | |
1528 | print_rhn_list(__func__, NULL); /* debug */ | |
1529 | } | |
1530 | #endif | |
1531 | rc = skiplist_next_value(sl, prefix, (void *)&pb, &cursor); | |
1532 | } | |
1533 | vnc_zlog_debug_verbose("%s: done", __func__); | |
1534 | } | |
1535 | ||
1536 | ||
1537 | void vnc_import_bgp_del_vnc_host_route_mode_resolve_nve( | |
1538 | struct bgp *bgp, struct prefix_rd *prd, /* RD */ | |
1539 | struct bgp_table *table_rd, /* per-rd VPN route table */ | |
1540 | struct prefix *prefix, /* VPN prefix */ | |
1541 | struct bgp_info *bi) /* old VPN host route */ | |
1542 | { | |
1543 | afi_t afi = family2afi(prefix->family); | |
1544 | struct skiplist *sl = NULL; | |
1545 | struct prefix_bag *pb; | |
1546 | void *cursor; | |
1547 | struct rfapi_cfg *hc = NULL; | |
1548 | int rc; | |
1549 | ||
1550 | { | |
1551 | char str_pfx[PREFIX_STRLEN]; | |
1552 | ||
1553 | prefix2str(prefix, str_pfx, sizeof(str_pfx)); | |
1554 | ||
1555 | vnc_zlog_debug_verbose("%s(bgp=%p, nve prefix=%s)", __func__, | |
1556 | bgp, str_pfx); | |
1557 | } | |
1558 | ||
1559 | if (afi != AFI_IP && afi != AFI_IP6) | |
1560 | return; | |
1561 | ||
1562 | if (!(hc = bgp->rfapi_cfg)) { | |
1563 | vnc_zlog_debug_verbose("%s: bgp->rfapi_cfg is NULL, skipping", | |
1564 | __func__); | |
1565 | return; | |
1566 | } | |
1567 | ||
1568 | /* check vnc redist flag for bgp direct routes */ | |
1569 | if (!hc->redist[afi][ZEBRA_ROUTE_BGP_DIRECT]) { | |
1570 | vnc_zlog_debug_verbose( | |
1571 | "%s: bgp->rfapi_cfg->redist[afi=%d][type=ZEBRA_ROUTE_BGP_DIRECT] is 0, skipping", | |
1572 | __func__, afi); | |
1573 | return; | |
1574 | } | |
1575 | ||
1576 | if (hc->redist_mode != VNC_REDIST_MODE_RESOLVE_NVE) { | |
1577 | vnc_zlog_debug_verbose("%s: not in resolve-nve mode, skipping", | |
1578 | __func__); | |
1579 | return; | |
1580 | } | |
1581 | ||
1582 | if (bgp->rfapi) | |
1583 | sl = bgp->rfapi->resolve_nve_nexthop; | |
1584 | ||
1585 | if (!sl) { | |
1586 | vnc_zlog_debug_verbose("%s: no RHN entries, skipping", | |
1587 | __func__); | |
1588 | return; | |
1589 | } | |
1590 | ||
1591 | if (!is_host_prefix(prefix)) { | |
1592 | vnc_zlog_debug_verbose("%s: not host route, skip", __func__); | |
1593 | return; | |
1594 | } | |
1595 | ||
1596 | /* | |
1597 | * Find all entries with key == CE in the RHN list | |
1598 | */ | |
1599 | rc = skiplist_first_value(sl, prefix, (void *)&pb, &cursor); | |
1600 | while (!rc) { | |
1601 | ||
1602 | struct ecommunity *ecom; | |
1603 | struct prefix pfx_unicast_nexthop; | |
1604 | ||
1605 | memset(&pfx_unicast_nexthop, 0, | |
1606 | sizeof(struct prefix)); /* keep valgrind happy */ | |
1607 | ||
1608 | if (process_unicast_route(bgp, afi, &pb->upfx, pb->ubi, &ecom, | |
1609 | &pfx_unicast_nexthop)) { | |
1610 | ||
1611 | vnc_zlog_debug_verbose( | |
1612 | "%s: process_unicast_route error, skipping", | |
1613 | __func__); | |
1614 | continue; | |
1615 | } | |
1616 | ||
1617 | /* | |
1618 | * Sanity check | |
1619 | */ | |
1620 | if (vnc_prefix_cmp(&pfx_unicast_nexthop, prefix)) { | |
1621 | char str_unh[PREFIX_STRLEN]; | |
1622 | char str_nve_pfx[PREFIX_STRLEN]; | |
1623 | ||
1624 | prefix2str(&pfx_unicast_nexthop, str_unh, | |
1625 | sizeof(str_unh)); | |
1626 | prefix2str(prefix, str_nve_pfx, sizeof(str_nve_pfx)); | |
1627 | ||
1628 | vnc_zlog_debug_verbose( | |
1629 | "%s: FATAL: resolve_nve_nexthop list item bi nexthop %s != nve pfx %s", | |
1630 | __func__, str_unh, str_nve_pfx); | |
1631 | assert(0); | |
1632 | } | |
1633 | ||
1634 | vnc_import_bgp_del_route_mode_resolve_nve_one_bi( | |
1635 | bgp, afi, bi, prd, &pb->upfx); | |
1636 | ||
1637 | if (ecom) | |
1638 | ecommunity_free(&ecom); | |
1639 | ||
1640 | rc = skiplist_next_value(sl, prefix, (void *)&pb, &cursor); | |
1641 | } | |
1642 | } | |
1643 | ||
1644 | ||
1645 | /*********************************************************************** | |
1646 | * Exterior Routes | |
1647 | ***********************************************************************/ | |
1648 | ||
1649 | #define DEBUG_IS_USABLE_INTERIOR 1 | |
1650 | ||
1651 | static int is_usable_interior_route(struct bgp_info *bi_interior) | |
1652 | { | |
1653 | if (!VALID_INTERIOR_TYPE(bi_interior->type)) { | |
1654 | #if DEBUG_IS_USABLE_INTERIOR | |
1655 | vnc_zlog_debug_verbose( | |
1656 | "%s: NO: type %d is not valid interior type", __func__, | |
1657 | bi_interior->type); | |
1658 | #endif | |
1659 | return 0; | |
1660 | } | |
1661 | if (!CHECK_FLAG(bi_interior->flags, BGP_INFO_VALID)) { | |
1662 | #if DEBUG_IS_USABLE_INTERIOR | |
1663 | vnc_zlog_debug_verbose("%s: NO: BGP_INFO_VALID not set", | |
1664 | __func__); | |
1665 | #endif | |
1666 | return 0; | |
1667 | } | |
1668 | return 1; | |
1669 | } | |
1670 | ||
1671 | /* | |
1672 | * There should be only one of these per prefix at a time. | |
1673 | * This should be called as a result of selection operation | |
1674 | * | |
1675 | * NB should be called espacially for bgp instances that are named, | |
1676 | * because the exterior routes will always come from one of those. | |
1677 | * We filter here on the instance name to make sure we get only the | |
1678 | * right routes. | |
1679 | */ | |
1680 | static void vnc_import_bgp_exterior_add_route_it( | |
1681 | struct bgp *bgp, /* exterior instance, we hope */ | |
1682 | struct prefix *prefix, /* unicast prefix */ | |
1683 | struct bgp_info *info, /* unicast info */ | |
1684 | struct rfapi_import_table *it_only) /* NULL, or limit to this IT */ | |
1685 | { | |
1686 | struct rfapi *h; | |
1687 | struct rfapi_cfg *hc; | |
1688 | struct prefix pfx_orig_nexthop; | |
1689 | struct rfapi_import_table *it; | |
1690 | struct bgp *bgp_default = bgp_get_default(); | |
1691 | afi_t afi = family2afi(prefix->family); | |
1692 | ||
1693 | if (!bgp_default) | |
1694 | return; | |
1695 | ||
1696 | h = bgp_default->rfapi; | |
1697 | hc = bgp_default->rfapi_cfg; | |
1698 | ||
1699 | vnc_zlog_debug_verbose("%s: entry with it=%p", __func__, it_only); | |
1700 | ||
1701 | if (!h || !hc) { | |
1702 | vnc_zlog_debug_verbose( | |
1703 | "%s: rfapi or rfapi_cfg not instantiated, skipping", | |
1704 | __func__); | |
1705 | return; | |
1706 | } | |
1707 | if (!hc->redist_bgp_exterior_view) { | |
1708 | vnc_zlog_debug_verbose("%s: exterior view not set, skipping", | |
1709 | __func__); | |
1710 | return; | |
1711 | } | |
1712 | if (bgp != hc->redist_bgp_exterior_view) { | |
1713 | vnc_zlog_debug_verbose( | |
1714 | "%s: bgp %p != hc->redist_bgp_exterior_view %p, skipping", | |
1715 | __func__, bgp, hc->redist_bgp_exterior_view); | |
1716 | return; | |
1717 | } | |
1718 | ||
1719 | if (!hc->redist[afi][ZEBRA_ROUTE_BGP_DIRECT_EXT]) { | |
1720 | vnc_zlog_debug_verbose( | |
1721 | "%s: redist of exterior routes not enabled, skipping", | |
1722 | __func__); | |
1723 | return; | |
1724 | } | |
1725 | ||
1726 | if (!info->attr) { | |
1727 | vnc_zlog_debug_verbose("%s: no info, skipping", __func__); | |
1728 | return; | |
1729 | } | |
1730 | ||
1731 | /* | |
1732 | * Extract nexthop from exterior route | |
1733 | * | |
1734 | * Incoming prefix is unicast. If v6, it is in multiprotocol area, | |
1735 | * but if v4 it is in attr->nexthop | |
1736 | */ | |
1737 | rfapiUnicastNexthop2Prefix(afi, info->attr, &pfx_orig_nexthop); | |
1738 | ||
1739 | for (it = h->imports; it; it = it->next) { | |
1740 | struct agg_table *table; | |
1741 | struct agg_node *rn; | |
1742 | struct agg_node *par; | |
1743 | struct bgp_info *bi_interior; | |
1744 | int have_usable_route; | |
1745 | ||
1746 | vnc_zlog_debug_verbose("%s: doing it %p", __func__, it); | |
1747 | ||
1748 | if (it_only && (it_only != it)) { | |
1749 | vnc_zlog_debug_verbose("%s: doesn't match it_only %p", | |
1750 | __func__, it_only); | |
1751 | continue; | |
1752 | } | |
1753 | ||
1754 | table = it->imported_vpn[afi]; | |
1755 | ||
1756 | for (rn = agg_node_match(table, &pfx_orig_nexthop), | |
1757 | have_usable_route = 0; | |
1758 | (!have_usable_route) && rn;) { | |
1759 | ||
1760 | vnc_zlog_debug_verbose("%s: it %p trying rn %p", | |
1761 | __func__, it, rn); | |
1762 | ||
1763 | for (bi_interior = rn->info; bi_interior; | |
1764 | bi_interior = bi_interior->next) { | |
1765 | struct prefix_rd *prd; | |
1766 | struct attr new_attr; | |
1767 | uint32_t label = 0; | |
1768 | ||
1769 | if (!is_usable_interior_route(bi_interior)) | |
1770 | continue; | |
1771 | ||
1772 | vnc_zlog_debug_verbose( | |
1773 | "%s: usable: bi_interior %p", __func__, | |
1774 | bi_interior); | |
1775 | ||
1776 | /* | |
1777 | * have a legitimate route to exterior's nexthop | |
1778 | * via NVE. | |
1779 | * | |
1780 | * Import unicast route to the import table | |
1781 | */ | |
1782 | have_usable_route = 1; | |
1783 | ||
1784 | if (bi_interior->extra) { | |
1785 | prd = &bi_interior->extra->vnc.import | |
1786 | .rd; | |
1787 | label = decode_label( | |
1788 | &bi_interior->extra->label[0]); | |
1789 | } else | |
1790 | prd = NULL; | |
1791 | ||
1792 | /* use local_pref from unicast route */ | |
1793 | memset(&new_attr, 0, sizeof(struct attr)); | |
1794 | bgp_attr_dup(&new_attr, bi_interior->attr); | |
1795 | if (info->attr->flag | |
1796 | & ATTR_FLAG_BIT(BGP_ATTR_LOCAL_PREF)) { | |
1797 | new_attr.local_pref = | |
1798 | info->attr->local_pref; | |
1799 | new_attr.flag |= ATTR_FLAG_BIT( | |
1800 | BGP_ATTR_LOCAL_PREF); | |
1801 | } | |
1802 | ||
1803 | rfapiBgpInfoFilteredImportVPN( | |
1804 | it, FIF_ACTION_UPDATE, | |
1805 | bi_interior->peer, NULL, /* rfd */ | |
1806 | prefix, NULL, afi, prd, &new_attr, | |
1807 | ZEBRA_ROUTE_BGP_DIRECT_EXT, | |
1808 | BGP_ROUTE_REDISTRIBUTE, &label); | |
1809 | } | |
1810 | ||
1811 | if (have_usable_route) { | |
1812 | /* | |
1813 | * Make monitor | |
1814 | * | |
1815 | * TBD factor this out into its own function | |
1816 | */ | |
1817 | struct prefix *pfx_mon = prefix_new(); | |
1818 | if (!RFAPI_MONITOR_EXTERIOR(rn)->source) { | |
1819 | RFAPI_MONITOR_EXTERIOR(rn)->source = | |
1820 | skiplist_new( | |
1821 | 0, NULL, | |
1822 | (void (*)(void *)) | |
1823 | prefix_free); | |
1824 | agg_lock_node(rn); /* for skiplist */ | |
1825 | } | |
1826 | agg_lock_node(rn); /* for skiplist entry */ | |
1827 | prefix_copy(pfx_mon, prefix); | |
1828 | if (!skiplist_insert( | |
1829 | RFAPI_MONITOR_EXTERIOR(rn)->source, | |
1830 | info, pfx_mon)) { | |
1831 | ||
1832 | bgp_info_lock(info); | |
1833 | } | |
1834 | } | |
1835 | par = agg_node_parent(rn); | |
1836 | if (par) | |
1837 | agg_lock_node(par); | |
1838 | agg_unlock_node(rn); | |
1839 | rn = par; | |
1840 | } | |
1841 | if (rn) | |
1842 | agg_unlock_node(rn); | |
1843 | ||
1844 | if (!have_usable_route) { | |
1845 | struct prefix *pfx_mon = prefix_new(); | |
1846 | prefix_copy(pfx_mon, prefix); | |
1847 | if (!skiplist_insert(it->monitor_exterior_orphans, info, | |
1848 | pfx_mon)) { | |
1849 | ||
1850 | bgp_info_lock(info); | |
1851 | } | |
1852 | } | |
1853 | } | |
1854 | } | |
1855 | ||
1856 | void vnc_import_bgp_exterior_add_route( | |
1857 | struct bgp *bgp, /* exterior instance, we hope */ | |
1858 | struct prefix *prefix, /* unicast prefix */ | |
1859 | struct bgp_info *info) /* unicast info */ | |
1860 | { | |
1861 | vnc_import_bgp_exterior_add_route_it(bgp, prefix, info, NULL); | |
1862 | } | |
1863 | ||
1864 | /* | |
1865 | * There should be only one of these per prefix at a time. | |
1866 | * This should probably be called as a result of selection operation. | |
1867 | * | |
1868 | * NB should be called espacially for bgp instances that are named, | |
1869 | * because the exterior routes will always come from one of those. | |
1870 | * We filter here on the instance name to make sure we get only the | |
1871 | * right routes. | |
1872 | */ | |
1873 | void vnc_import_bgp_exterior_del_route( | |
1874 | struct bgp *bgp, struct prefix *prefix, /* unicast prefix */ | |
1875 | struct bgp_info *info) /* unicast info */ | |
1876 | { | |
1877 | struct rfapi *h; | |
1878 | struct rfapi_cfg *hc; | |
1879 | struct rfapi_import_table *it; | |
1880 | struct prefix pfx_orig_nexthop; | |
1881 | afi_t afi = family2afi(prefix->family); | |
1882 | struct bgp *bgp_default = bgp_get_default(); | |
1883 | ||
1884 | if (!bgp_default) | |
1885 | return; | |
1886 | ||
1887 | memset(&pfx_orig_nexthop, 0, | |
1888 | sizeof(struct prefix)); /* keep valgrind happy */ | |
1889 | ||
1890 | h = bgp_default->rfapi; | |
1891 | hc = bgp_default->rfapi_cfg; | |
1892 | ||
1893 | if (!h || !hc) { | |
1894 | vnc_zlog_debug_verbose( | |
1895 | "%s: rfapi or rfapi_cfg not instantiated, skipping", | |
1896 | __func__); | |
1897 | return; | |
1898 | } | |
1899 | if (!hc->redist_bgp_exterior_view) { | |
1900 | vnc_zlog_debug_verbose("%s: exterior view not set, skipping", | |
1901 | __func__); | |
1902 | return; | |
1903 | } | |
1904 | if (bgp != hc->redist_bgp_exterior_view) { | |
1905 | vnc_zlog_debug_verbose( | |
1906 | "%s: bgp %p != hc->redist_bgp_exterior_view %p, skipping", | |
1907 | __func__, bgp, hc->redist_bgp_exterior_view); | |
1908 | return; | |
1909 | } | |
1910 | if (!hc->redist[afi][ZEBRA_ROUTE_BGP_DIRECT_EXT]) { | |
1911 | vnc_zlog_debug_verbose( | |
1912 | "%s: redist of exterior routes no enabled, skipping", | |
1913 | __func__); | |
1914 | return; | |
1915 | } | |
1916 | ||
1917 | if (!info->attr) { | |
1918 | vnc_zlog_debug_verbose("%s: no info, skipping", __func__); | |
1919 | return; | |
1920 | } | |
1921 | ||
1922 | /* | |
1923 | * Extract nexthop from exterior route | |
1924 | * | |
1925 | * Incoming prefix is unicast. If v6, it is in multiprotocol area, | |
1926 | * but if v4 it is in attr->nexthop | |
1927 | */ | |
1928 | rfapiUnicastNexthop2Prefix(afi, info->attr, &pfx_orig_nexthop); | |
1929 | ||
1930 | for (it = h->imports; it; it = it->next) { | |
1931 | struct agg_table *table; | |
1932 | struct agg_node *rn; | |
1933 | struct agg_node *par; | |
1934 | struct bgp_info *bi_interior; | |
1935 | int have_usable_route; | |
1936 | ||
1937 | table = it->imported_vpn[afi]; | |
1938 | ||
1939 | for (rn = agg_node_match(table, &pfx_orig_nexthop), | |
1940 | have_usable_route = 0; | |
1941 | (!have_usable_route) && rn;) { | |
1942 | ||
1943 | for (bi_interior = rn->info; bi_interior; | |
1944 | bi_interior = bi_interior->next) { | |
1945 | struct prefix_rd *prd; | |
1946 | uint32_t label = 0; | |
1947 | ||
1948 | if (!is_usable_interior_route(bi_interior)) | |
1949 | continue; | |
1950 | ||
1951 | /* | |
1952 | * have a legitimate route to exterior's nexthop | |
1953 | * via NVE. | |
1954 | * | |
1955 | * Import unicast route to the import table | |
1956 | */ | |
1957 | have_usable_route = 1; | |
1958 | ||
1959 | if (bi_interior->extra) { | |
1960 | prd = &bi_interior->extra->vnc.import | |
1961 | .rd; | |
1962 | label = decode_label( | |
1963 | &bi_interior->extra->label[0]); | |
1964 | } else | |
1965 | prd = NULL; | |
1966 | ||
1967 | rfapiBgpInfoFilteredImportVPN( | |
1968 | it, FIF_ACTION_KILL, bi_interior->peer, | |
1969 | NULL, /* rfd */ | |
1970 | prefix, NULL, afi, prd, | |
1971 | bi_interior->attr, | |
1972 | ZEBRA_ROUTE_BGP_DIRECT_EXT, | |
1973 | BGP_ROUTE_REDISTRIBUTE, &label); | |
1974 | ||
1975 | /* | |
1976 | * Delete monitor | |
1977 | * | |
1978 | * TBD factor this out into its own function | |
1979 | */ | |
1980 | { | |
1981 | if (RFAPI_MONITOR_EXTERIOR(rn) | |
1982 | ->source) { | |
1983 | if (!skiplist_delete( | |
1984 | RFAPI_MONITOR_EXTERIOR( | |
1985 | rn) | |
1986 | ->source, | |
1987 | info, NULL)) { | |
1988 | ||
1989 | bgp_info_unlock(info); | |
1990 | agg_unlock_node( | |
1991 | rn); /* sl entry | |
1992 | */ | |
1993 | } | |
1994 | if (skiplist_empty( | |
1995 | RFAPI_MONITOR_EXTERIOR( | |
1996 | rn) | |
1997 | ->source)) { | |
1998 | skiplist_free( | |
1999 | RFAPI_MONITOR_EXTERIOR( | |
2000 | rn) | |
2001 | ->source); | |
2002 | RFAPI_MONITOR_EXTERIOR( | |
2003 | rn) | |
2004 | ->source = NULL; | |
2005 | agg_unlock_node( | |
2006 | rn); /* skiplist | |
2007 | itself | |
2008 | */ | |
2009 | } | |
2010 | } | |
2011 | } | |
2012 | } | |
2013 | par = agg_node_parent(rn); | |
2014 | if (par) | |
2015 | agg_lock_node(par); | |
2016 | agg_unlock_node(rn); | |
2017 | rn = par; | |
2018 | } | |
2019 | if (rn) | |
2020 | agg_unlock_node(rn); | |
2021 | ||
2022 | if (!have_usable_route) { | |
2023 | if (!skiplist_delete(it->monitor_exterior_orphans, info, | |
2024 | NULL)) { | |
2025 | ||
2026 | bgp_info_unlock(info); | |
2027 | } | |
2028 | } | |
2029 | } | |
2030 | } | |
2031 | ||
2032 | /* | |
2033 | * This function should be called after a new interior VPN route | |
2034 | * has been added to an import_table. | |
2035 | * | |
2036 | * NB should also be called whenever an existing vpn interior route | |
2037 | * becomes valid (e.g., valid_interior_count is inremented) | |
2038 | */ | |
2039 | void vnc_import_bgp_exterior_add_route_interior( | |
2040 | struct bgp *bgp, struct rfapi_import_table *it, | |
2041 | struct agg_node *rn_interior, /* VPN IT node */ | |
2042 | struct bgp_info *bi_interior) /* VPN IT route */ | |
2043 | { | |
2044 | afi_t afi = family2afi(rn_interior->p.family); | |
2045 | struct agg_node *par; | |
2046 | struct bgp_info *bi_exterior; | |
2047 | struct prefix *pfx_exterior; /* exterior pfx */ | |
2048 | void *cursor; | |
2049 | int rc; | |
2050 | struct list *list_adopted; | |
2051 | ||
2052 | vnc_zlog_debug_verbose("%s: entry", __func__); | |
2053 | ||
2054 | if (!is_usable_interior_route(bi_interior)) { | |
2055 | vnc_zlog_debug_verbose( | |
2056 | "%s: not usable interior route, skipping", __func__); | |
2057 | return; | |
2058 | } | |
2059 | ||
2060 | if (!bgp->rfapi_cfg->redist[afi][ZEBRA_ROUTE_BGP_DIRECT_EXT]) { | |
2061 | vnc_zlog_debug_verbose( | |
2062 | "%s: redist of exterior routes no enabled, skipping", | |
2063 | __func__); | |
2064 | return; | |
2065 | } | |
2066 | ||
2067 | if (it == bgp->rfapi->it_ce) { | |
2068 | vnc_zlog_debug_verbose("%s: import table is it_ce, skipping", | |
2069 | __func__); | |
2070 | return; | |
2071 | } | |
2072 | ||
2073 | /*debugging */ | |
2074 | { | |
2075 | char str_pfx[PREFIX_STRLEN]; | |
2076 | ||
2077 | prefix2str(&rn_interior->p, str_pfx, sizeof(str_pfx)); | |
2078 | vnc_zlog_debug_verbose("%s: interior prefix=%s, bi type=%d", | |
2079 | __func__, str_pfx, bi_interior->type); | |
2080 | } | |
2081 | ||
2082 | if (RFAPI_HAS_MONITOR_EXTERIOR(rn_interior)) { | |
2083 | ||
2084 | int count = 0; /* debugging */ | |
2085 | ||
2086 | vnc_zlog_debug_verbose( | |
2087 | "%s: has exterior monitor; ext src: %p", __func__, | |
2088 | RFAPI_MONITOR_EXTERIOR(rn_interior)->source); | |
2089 | ||
2090 | /* | |
2091 | * There is a monitor here already. Therefore, we do not need | |
2092 | * to do any pulldown. Just construct exterior routes based | |
2093 | * on the new interior route. | |
2094 | */ | |
2095 | cursor = NULL; | |
2096 | for (rc = skiplist_next( | |
2097 | RFAPI_MONITOR_EXTERIOR(rn_interior)->source, | |
2098 | (void **)&bi_exterior, (void **)&pfx_exterior, | |
2099 | &cursor); | |
2100 | !rc; rc = skiplist_next( | |
2101 | RFAPI_MONITOR_EXTERIOR(rn_interior)->source, | |
2102 | (void **)&bi_exterior, (void **)&pfx_exterior, | |
2103 | &cursor)) { | |
2104 | ||
2105 | struct prefix_rd *prd; | |
2106 | struct attr new_attr; | |
2107 | uint32_t label = 0; | |
2108 | ||
2109 | ||
2110 | ++count; /* debugging */ | |
2111 | ||
2112 | assert(bi_exterior); | |
2113 | assert(pfx_exterior); | |
2114 | ||
2115 | if (bi_interior->extra) { | |
2116 | prd = &bi_interior->extra->vnc.import.rd; | |
2117 | label = decode_label( | |
2118 | &bi_interior->extra->label[0]); | |
2119 | } else | |
2120 | prd = NULL; | |
2121 | ||
2122 | /* use local_pref from unicast route */ | |
2123 | memset(&new_attr, 0, sizeof(struct attr)); | |
2124 | bgp_attr_dup(&new_attr, bi_interior->attr); | |
2125 | if (bi_exterior | |
2126 | && (bi_exterior->attr->flag | |
2127 | & ATTR_FLAG_BIT(BGP_ATTR_LOCAL_PREF))) { | |
2128 | new_attr.local_pref = | |
2129 | bi_exterior->attr->local_pref; | |
2130 | new_attr.flag |= | |
2131 | ATTR_FLAG_BIT(BGP_ATTR_LOCAL_PREF); | |
2132 | } | |
2133 | ||
2134 | rfapiBgpInfoFilteredImportVPN( | |
2135 | it, FIF_ACTION_UPDATE, bi_interior->peer, | |
2136 | NULL, /* rfd */ | |
2137 | pfx_exterior, NULL, afi, prd, &new_attr, | |
2138 | ZEBRA_ROUTE_BGP_DIRECT_EXT, | |
2139 | BGP_ROUTE_REDISTRIBUTE, &label); | |
2140 | } | |
2141 | vnc_zlog_debug_verbose( | |
2142 | "%s: finished constructing exteriors based on existing monitors", | |
2143 | __func__); | |
2144 | return; | |
2145 | } | |
2146 | ||
2147 | vnc_zlog_debug_verbose("%s: no exterior monitor", __func__); | |
2148 | ||
2149 | /* | |
2150 | * No monitor at this node. Is this the first valid interior | |
2151 | * route at this node? | |
2152 | */ | |
2153 | if (RFAPI_MONITOR_EXTERIOR(rn_interior)->valid_interior_count > 1) { | |
2154 | vnc_zlog_debug_verbose( | |
2155 | "%s: new interior route not first valid one, skipping pulldown", | |
2156 | __func__); | |
2157 | return; | |
2158 | } | |
2159 | ||
2160 | /* | |
2161 | * Look up the tree for possible pulldown candidates. | |
2162 | * Find nearest parent with an exterior route monitor | |
2163 | */ | |
2164 | for (par = agg_node_parent(rn_interior); par; | |
2165 | par = agg_node_parent(par)) { | |
2166 | if (RFAPI_HAS_MONITOR_EXTERIOR(par)) | |
2167 | break; | |
2168 | } | |
2169 | ||
2170 | if (par) { | |
2171 | ||
2172 | vnc_zlog_debug_verbose( | |
2173 | "%s: checking parent %p for possible pulldowns", | |
2174 | __func__, par); | |
2175 | ||
2176 | /* check monitors at par for possible pulldown */ | |
2177 | cursor = NULL; | |
2178 | for (rc = skiplist_next(RFAPI_MONITOR_EXTERIOR(par)->source, | |
2179 | (void **)&bi_exterior, | |
2180 | (void **)&pfx_exterior, &cursor); | |
2181 | !rc; | |
2182 | rc = skiplist_next(RFAPI_MONITOR_EXTERIOR(par)->source, | |
2183 | (void **)&bi_exterior, | |
2184 | (void **)&pfx_exterior, &cursor)) { | |
2185 | ||
2186 | struct prefix pfx_nexthop; | |
2187 | ||
2188 | memset(&pfx_nexthop, 0, | |
2189 | sizeof(struct prefix)); /* keep valgrind happy */ | |
2190 | ||
2191 | /* check original nexthop for prefix match */ | |
2192 | rfapiUnicastNexthop2Prefix(afi, bi_exterior->attr, | |
2193 | &pfx_nexthop); | |
2194 | ||
2195 | if (prefix_match(&rn_interior->p, &pfx_nexthop)) { | |
2196 | ||
2197 | struct bgp_info *bi; | |
2198 | struct prefix_rd *prd; | |
2199 | struct attr new_attr; | |
2200 | uint32_t label = 0; | |
2201 | ||
2202 | /* do pull-down */ | |
2203 | ||
2204 | /* | |
2205 | * add monitor to longer prefix | |
2206 | */ | |
2207 | struct prefix *pfx_mon = prefix_new(); | |
2208 | prefix_copy(pfx_mon, pfx_exterior); | |
2209 | if (!RFAPI_MONITOR_EXTERIOR(rn_interior) | |
2210 | ->source) { | |
2211 | RFAPI_MONITOR_EXTERIOR(rn_interior) | |
2212 | ->source = skiplist_new( | |
2213 | 0, NULL, | |
2214 | (void (*)(void *))prefix_free); | |
2215 | agg_lock_node(rn_interior); | |
2216 | } | |
2217 | skiplist_insert( | |
2218 | RFAPI_MONITOR_EXTERIOR(rn_interior) | |
2219 | ->source, | |
2220 | bi_exterior, pfx_mon); | |
2221 | agg_lock_node(rn_interior); | |
2222 | ||
2223 | /* | |
2224 | * Delete constructed exterior routes based on | |
2225 | * parent routes. | |
2226 | */ | |
2227 | for (bi = par->info; bi; bi = bi->next) { | |
2228 | ||
2229 | if (bi->extra) { | |
2230 | prd = &bi->extra->vnc.import.rd; | |
2231 | label = decode_label( | |
2232 | &bi->extra->label[0]); | |
2233 | } else | |
2234 | prd = NULL; | |
2235 | ||
2236 | rfapiBgpInfoFilteredImportVPN( | |
2237 | it, FIF_ACTION_KILL, bi->peer, | |
2238 | NULL, /* rfd */ | |
2239 | pfx_exterior, NULL, afi, prd, | |
2240 | bi->attr, | |
2241 | ZEBRA_ROUTE_BGP_DIRECT_EXT, | |
2242 | BGP_ROUTE_REDISTRIBUTE, &label); | |
2243 | } | |
2244 | ||
2245 | ||
2246 | /* | |
2247 | * Add constructed exterior routes based on | |
2248 | * the new interior route at longer prefix. | |
2249 | */ | |
2250 | if (bi_interior->extra) { | |
2251 | prd = &bi_interior->extra->vnc.import | |
2252 | .rd; | |
2253 | label = decode_label( | |
2254 | &bi_interior->extra->label[0]); | |
2255 | } else | |
2256 | prd = NULL; | |
2257 | ||
2258 | /* use local_pref from unicast route */ | |
2259 | memset(&new_attr, 0, sizeof(struct attr)); | |
2260 | bgp_attr_dup(&new_attr, bi_interior->attr); | |
2261 | if (bi_exterior | |
2262 | && (bi_exterior->attr->flag | |
2263 | & ATTR_FLAG_BIT(BGP_ATTR_LOCAL_PREF))) { | |
2264 | new_attr.local_pref = | |
2265 | bi_exterior->attr->local_pref; | |
2266 | new_attr.flag |= ATTR_FLAG_BIT( | |
2267 | BGP_ATTR_LOCAL_PREF); | |
2268 | } | |
2269 | ||
2270 | rfapiBgpInfoFilteredImportVPN( | |
2271 | it, FIF_ACTION_UPDATE, | |
2272 | bi_interior->peer, NULL, /* rfd */ | |
2273 | pfx_exterior, NULL, afi, prd, &new_attr, | |
2274 | ZEBRA_ROUTE_BGP_DIRECT_EXT, | |
2275 | BGP_ROUTE_REDISTRIBUTE, &label); | |
2276 | } | |
2277 | } | |
2278 | ||
2279 | /* | |
2280 | * The only monitors at rn_interior are the ones we added just | |
2281 | * above, so we can use the rn_interior list to identify which | |
2282 | * monitors to delete from the parent. | |
2283 | */ | |
2284 | cursor = NULL; | |
2285 | for (rc = skiplist_next( | |
2286 | RFAPI_MONITOR_EXTERIOR(rn_interior)->source, | |
2287 | (void **)&bi_exterior, NULL, &cursor); | |
2288 | !rc; rc = skiplist_next( | |
2289 | RFAPI_MONITOR_EXTERIOR(rn_interior)->source, | |
2290 | (void **)&bi_exterior, NULL, &cursor)) { | |
2291 | ||
2292 | ||
2293 | skiplist_delete(RFAPI_MONITOR_EXTERIOR(par)->source, | |
2294 | bi_exterior, NULL); | |
2295 | agg_unlock_node(par); /* sl entry */ | |
2296 | } | |
2297 | if (skiplist_empty(RFAPI_MONITOR_EXTERIOR(par)->source)) { | |
2298 | skiplist_free(RFAPI_MONITOR_EXTERIOR(par)->source); | |
2299 | RFAPI_MONITOR_EXTERIOR(par)->source = NULL; | |
2300 | agg_unlock_node(par); /* sl itself */ | |
2301 | } | |
2302 | } | |
2303 | ||
2304 | vnc_zlog_debug_verbose("%s: checking orphans", __func__); | |
2305 | ||
2306 | /* | |
2307 | * See if any orphans can be pulled down to the current node | |
2308 | */ | |
2309 | cursor = NULL; | |
2310 | list_adopted = NULL; | |
2311 | for (rc = skiplist_next(it->monitor_exterior_orphans, | |
2312 | (void **)&bi_exterior, (void **)&pfx_exterior, | |
2313 | &cursor); | |
2314 | !rc; rc = skiplist_next(it->monitor_exterior_orphans, | |
2315 | (void **)&bi_exterior, | |
2316 | (void **)&pfx_exterior, &cursor)) { | |
2317 | ||
2318 | struct prefix pfx_nexthop; | |
2319 | char buf[PREFIX_STRLEN]; | |
2320 | afi_t afi_exterior = family2afi(pfx_exterior->family); | |
2321 | ||
2322 | prefix2str(pfx_exterior, buf, sizeof(buf)); | |
2323 | vnc_zlog_debug_verbose( | |
2324 | "%s: checking exterior orphan at prefix %s", __func__, | |
2325 | buf); | |
2326 | ||
2327 | if (afi_exterior != afi) { | |
2328 | vnc_zlog_debug_verbose( | |
2329 | "%s: exterior orphan afi %d != interior afi %d, skip", | |
2330 | __func__, afi_exterior, afi); | |
2331 | continue; | |
2332 | } | |
2333 | ||
2334 | /* check original nexthop for prefix match */ | |
2335 | rfapiUnicastNexthop2Prefix(afi, bi_exterior->attr, | |
2336 | &pfx_nexthop); | |
2337 | ||
2338 | if (prefix_match(&rn_interior->p, &pfx_nexthop)) { | |
2339 | ||
2340 | struct prefix_rd *prd; | |
2341 | struct attr new_attr; | |
2342 | uint32_t label = 0; | |
2343 | ||
2344 | /* do pull-down */ | |
2345 | ||
2346 | /* | |
2347 | * add monitor to longer prefix | |
2348 | */ | |
2349 | ||
2350 | struct prefix *pfx_mon = prefix_new(); | |
2351 | prefix_copy(pfx_mon, pfx_exterior); | |
2352 | if (!RFAPI_MONITOR_EXTERIOR(rn_interior)->source) { | |
2353 | RFAPI_MONITOR_EXTERIOR(rn_interior)->source = | |
2354 | skiplist_new( | |
2355 | 0, NULL, | |
2356 | (void (*)(void *))prefix_free); | |
2357 | agg_lock_node(rn_interior); /* sl */ | |
2358 | } | |
2359 | skiplist_insert( | |
2360 | RFAPI_MONITOR_EXTERIOR(rn_interior)->source, | |
2361 | bi_exterior, pfx_mon); | |
2362 | agg_lock_node(rn_interior); /* sl entry */ | |
2363 | if (!list_adopted) { | |
2364 | list_adopted = list_new(); | |
2365 | } | |
2366 | listnode_add(list_adopted, bi_exterior); | |
2367 | ||
2368 | /* | |
2369 | * Add constructed exterior routes based on the | |
2370 | * new interior route at the longer prefix. | |
2371 | */ | |
2372 | if (bi_interior->extra) { | |
2373 | prd = &bi_interior->extra->vnc.import.rd; | |
2374 | label = decode_label( | |
2375 | &bi_interior->extra->label[0]); | |
2376 | } else | |
2377 | prd = NULL; | |
2378 | ||
2379 | /* use local_pref from unicast route */ | |
2380 | memset(&new_attr, 0, sizeof(struct attr)); | |
2381 | bgp_attr_dup(&new_attr, bi_interior->attr); | |
2382 | if (bi_exterior | |
2383 | && (bi_exterior->attr->flag | |
2384 | & ATTR_FLAG_BIT(BGP_ATTR_LOCAL_PREF))) { | |
2385 | new_attr.local_pref = | |
2386 | bi_exterior->attr->local_pref; | |
2387 | new_attr.flag |= | |
2388 | ATTR_FLAG_BIT(BGP_ATTR_LOCAL_PREF); | |
2389 | } | |
2390 | ||
2391 | rfapiBgpInfoFilteredImportVPN( | |
2392 | it, FIF_ACTION_UPDATE, bi_interior->peer, | |
2393 | NULL, /* rfd */ | |
2394 | pfx_exterior, NULL, afi, prd, &new_attr, | |
2395 | ZEBRA_ROUTE_BGP_DIRECT_EXT, | |
2396 | BGP_ROUTE_REDISTRIBUTE, &label); | |
2397 | } | |
2398 | } | |
2399 | if (list_adopted) { | |
2400 | struct listnode *node; | |
2401 | struct agg_node *an_bi_exterior; | |
2402 | ||
2403 | for (ALL_LIST_ELEMENTS_RO(list_adopted, node, an_bi_exterior)) { | |
2404 | skiplist_delete(it->monitor_exterior_orphans, | |
2405 | an_bi_exterior, NULL); | |
2406 | } | |
2407 | list_delete(&list_adopted); | |
2408 | } | |
2409 | } | |
2410 | ||
2411 | /* | |
2412 | * This function should be called after an interior VPN route | |
2413 | * has been deleted from an import_table. | |
2414 | * bi_interior must still be valid, but it must already be detached | |
2415 | * from its route node and the route node's valid_interior_count | |
2416 | * must already be decremented. | |
2417 | * | |
2418 | * NB should also be called whenever an existing vpn interior route | |
2419 | * becomes invalid (e.g., valid_interior_count is decremented) | |
2420 | */ | |
2421 | void vnc_import_bgp_exterior_del_route_interior( | |
2422 | struct bgp *bgp, struct rfapi_import_table *it, | |
2423 | struct agg_node *rn_interior, /* VPN IT node */ | |
2424 | struct bgp_info *bi_interior) /* VPN IT route */ | |
2425 | { | |
2426 | afi_t afi = family2afi(rn_interior->p.family); | |
2427 | struct agg_node *par; | |
2428 | struct bgp_info *bi_exterior; | |
2429 | struct prefix *pfx_exterior; /* exterior pfx */ | |
2430 | void *cursor; | |
2431 | int rc; | |
2432 | ||
2433 | if (!VALID_INTERIOR_TYPE(bi_interior->type)) { | |
2434 | vnc_zlog_debug_verbose( | |
2435 | "%s: type %d not valid interior type, skipping", | |
2436 | __func__, bi_interior->type); | |
2437 | return; | |
2438 | } | |
2439 | ||
2440 | if (!bgp->rfapi_cfg->redist[afi][ZEBRA_ROUTE_BGP_DIRECT_EXT]) { | |
2441 | vnc_zlog_debug_verbose( | |
2442 | "%s: redist of exterior routes no enabled, skipping", | |
2443 | __func__); | |
2444 | return; | |
2445 | } | |
2446 | ||
2447 | if (it == bgp->rfapi->it_ce) { | |
2448 | vnc_zlog_debug_verbose("%s: it is it_ce, skipping", __func__); | |
2449 | return; | |
2450 | } | |
2451 | ||
2452 | /* If no exterior routes depend on this prefix, nothing to do */ | |
2453 | if (!RFAPI_HAS_MONITOR_EXTERIOR(rn_interior)) { | |
2454 | vnc_zlog_debug_verbose("%s: no exterior monitor, skipping", | |
2455 | __func__); | |
2456 | return; | |
2457 | } | |
2458 | ||
2459 | /*debugging */ | |
2460 | { | |
2461 | char str_pfx[PREFIX_STRLEN]; | |
2462 | ||
2463 | prefix2str(&rn_interior->p, str_pfx, sizeof(str_pfx)); | |
2464 | ||
2465 | vnc_zlog_debug_verbose("%s: interior prefix=%s, bi type=%d", | |
2466 | __func__, str_pfx, bi_interior->type); | |
2467 | } | |
2468 | ||
2469 | /* | |
2470 | * Remove constructed routes based on the deleted interior route | |
2471 | */ | |
2472 | cursor = NULL; | |
2473 | for (rc = skiplist_next(RFAPI_MONITOR_EXTERIOR(rn_interior)->source, | |
2474 | (void **)&bi_exterior, (void **)&pfx_exterior, | |
2475 | &cursor); | |
2476 | !rc; | |
2477 | rc = skiplist_next(RFAPI_MONITOR_EXTERIOR(rn_interior)->source, | |
2478 | (void **)&bi_exterior, (void **)&pfx_exterior, | |
2479 | &cursor)) { | |
2480 | ||
2481 | struct prefix_rd *prd; | |
2482 | uint32_t label = 0; | |
2483 | ||
2484 | if (bi_interior->extra) { | |
2485 | prd = &bi_interior->extra->vnc.import.rd; | |
2486 | label = decode_label(&bi_interior->extra->label[0]); | |
2487 | } else | |
2488 | prd = NULL; | |
2489 | ||
2490 | rfapiBgpInfoFilteredImportVPN( | |
2491 | it, FIF_ACTION_KILL, bi_interior->peer, NULL, /* rfd */ | |
2492 | pfx_exterior, NULL, afi, prd, bi_interior->attr, | |
2493 | ZEBRA_ROUTE_BGP_DIRECT_EXT, BGP_ROUTE_REDISTRIBUTE, | |
2494 | &label); | |
2495 | } | |
2496 | ||
2497 | /* | |
2498 | * If there are no remaining valid interior routes at this prefix, | |
2499 | * we need to look up the tree for a possible node to move monitors to | |
2500 | */ | |
2501 | if (RFAPI_MONITOR_EXTERIOR(rn_interior)->valid_interior_count) { | |
2502 | vnc_zlog_debug_verbose( | |
2503 | "%s: interior routes still present, skipping", | |
2504 | __func__); | |
2505 | return; | |
2506 | } | |
2507 | ||
2508 | /* | |
2509 | * Find nearest parent with at least one valid interior route | |
2510 | * If none is found, par will end up NULL, and we will move | |
2511 | * the monitors to the orphan list for this import table | |
2512 | */ | |
2513 | for (par = agg_node_parent(rn_interior); par; | |
2514 | par = agg_node_parent(par)) { | |
2515 | if (RFAPI_MONITOR_EXTERIOR(par)->valid_interior_count) | |
2516 | break; | |
2517 | } | |
2518 | ||
2519 | vnc_zlog_debug_verbose("%s: par=%p, ext src: %p", __func__, par, | |
2520 | RFAPI_MONITOR_EXTERIOR(rn_interior)->source); | |
2521 | ||
2522 | /* move all monitors */ | |
2523 | /* | |
2524 | * We will use and delete every element of the source skiplist | |
2525 | */ | |
2526 | while (!skiplist_first(RFAPI_MONITOR_EXTERIOR(rn_interior)->source, | |
2527 | (void **)&bi_exterior, (void **)&pfx_exterior)) { | |
2528 | ||
2529 | struct prefix *pfx_mon = prefix_new(); | |
2530 | ||
2531 | prefix_copy(pfx_mon, pfx_exterior); | |
2532 | ||
2533 | if (par) { | |
2534 | ||
2535 | struct bgp_info *bi; | |
2536 | ||
2537 | /* | |
2538 | * Add monitor to parent node | |
2539 | */ | |
2540 | if (!RFAPI_MONITOR_EXTERIOR(par)->source) { | |
2541 | RFAPI_MONITOR_EXTERIOR(par)->source = | |
2542 | skiplist_new( | |
2543 | 0, NULL, | |
2544 | (void (*)(void *))prefix_free); | |
2545 | agg_lock_node(par); /* sl */ | |
2546 | } | |
2547 | skiplist_insert(RFAPI_MONITOR_EXTERIOR(par)->source, | |
2548 | bi_exterior, pfx_mon); | |
2549 | agg_lock_node(par); /* sl entry */ | |
2550 | ||
2551 | /* Add constructed exterior routes based on parent */ | |
2552 | for (bi = par->info; bi; bi = bi->next) { | |
2553 | ||
2554 | struct prefix_rd *prd; | |
2555 | struct attr new_attr; | |
2556 | uint32_t label = 0; | |
2557 | ||
2558 | if (bi->type == ZEBRA_ROUTE_BGP_DIRECT_EXT) | |
2559 | continue; | |
2560 | ||
2561 | if (bi->extra) { | |
2562 | prd = &bi->extra->vnc.import.rd; | |
2563 | label = decode_label( | |
2564 | &bi->extra->label[0]); | |
2565 | } else | |
2566 | prd = NULL; | |
2567 | ||
2568 | /* use local_pref from unicast route */ | |
2569 | memset(&new_attr, 0, sizeof(struct attr)); | |
2570 | bgp_attr_dup(&new_attr, bi->attr); | |
2571 | if (bi_exterior | |
2572 | && (bi_exterior->attr->flag | |
2573 | & ATTR_FLAG_BIT(BGP_ATTR_LOCAL_PREF))) { | |
2574 | new_attr.local_pref = | |
2575 | bi_exterior->attr->local_pref; | |
2576 | new_attr.flag |= ATTR_FLAG_BIT( | |
2577 | BGP_ATTR_LOCAL_PREF); | |
2578 | } | |
2579 | ||
2580 | rfapiBgpInfoFilteredImportVPN( | |
2581 | it, FIF_ACTION_UPDATE, bi->peer, | |
2582 | NULL, /* rfd */ | |
2583 | pfx_exterior, NULL, afi, prd, &new_attr, | |
2584 | ZEBRA_ROUTE_BGP_DIRECT_EXT, | |
2585 | BGP_ROUTE_REDISTRIBUTE, &label); | |
2586 | } | |
2587 | ||
2588 | } else { | |
2589 | ||
2590 | /* | |
2591 | * No interior route for exterior's nexthop. Save | |
2592 | * monitor | |
2593 | * in orphan list to await future route. | |
2594 | */ | |
2595 | skiplist_insert(it->monitor_exterior_orphans, | |
2596 | bi_exterior, pfx_mon); | |
2597 | } | |
2598 | ||
2599 | skiplist_delete_first( | |
2600 | RFAPI_MONITOR_EXTERIOR(rn_interior)->source); | |
2601 | agg_unlock_node(rn_interior); /* sl entry */ | |
2602 | } | |
2603 | if (skiplist_empty(RFAPI_MONITOR_EXTERIOR(rn_interior)->source)) { | |
2604 | skiplist_free(RFAPI_MONITOR_EXTERIOR(rn_interior)->source); | |
2605 | RFAPI_MONITOR_EXTERIOR(rn_interior)->source = NULL; | |
2606 | agg_unlock_node(rn_interior); /* sl itself */ | |
2607 | } | |
2608 | } | |
2609 | ||
2610 | /*********************************************************************** | |
2611 | * Generic add/delete unicast routes | |
2612 | ***********************************************************************/ | |
2613 | ||
2614 | void vnc_import_bgp_add_route(struct bgp *bgp, struct prefix *prefix, | |
2615 | struct bgp_info *info) | |
2616 | { | |
2617 | afi_t afi = family2afi(prefix->family); | |
2618 | ||
2619 | if (VNC_DEBUG(VERBOSE)) { | |
2620 | struct prefix pfx_nexthop; | |
2621 | char buf[PREFIX_STRLEN]; | |
2622 | char buf_nh[PREFIX_STRLEN]; | |
2623 | ||
2624 | prefix2str(prefix, buf, sizeof(buf)); | |
2625 | rfapiUnicastNexthop2Prefix(afi, info->attr, &pfx_nexthop); | |
2626 | prefix2str(&pfx_nexthop, buf_nh, sizeof(buf_nh)); | |
2627 | ||
2628 | vnc_zlog_debug_verbose("%s: pfx %s, nh %s", __func__, buf, | |
2629 | buf_nh); | |
2630 | } | |
2631 | #if DEBUG_RHN_LIST | |
2632 | print_rhn_list(__func__, "ENTER "); | |
2633 | #endif | |
2634 | VNC_RHNCK(enter); | |
2635 | ||
2636 | if (!afi) { | |
2637 | flog_err(EC_LIB_DEVELOPMENT, "%s: can't get afi of prefix", | |
2638 | __func__); | |
2639 | return; | |
2640 | } | |
2641 | ||
2642 | if (!bgp->rfapi_cfg) { | |
2643 | vnc_zlog_debug_verbose("%s: bgp->rfapi_cfg is NULL, skipping", | |
2644 | __func__); | |
2645 | return; | |
2646 | } | |
2647 | ||
2648 | /* check vnc redist flag for bgp direct routes */ | |
2649 | if (!bgp->rfapi_cfg->redist[afi][ZEBRA_ROUTE_BGP_DIRECT]) { | |
2650 | vnc_zlog_debug_verbose( | |
2651 | "%s: bgp->rfapi_cfg->redist[afi=%d][type=%d=ZEBRA_ROUTE_BGP_DIRECT] is 0, skipping", | |
2652 | __func__, afi, ZEBRA_ROUTE_BGP_DIRECT); | |
2653 | return; | |
2654 | } | |
2655 | ||
2656 | switch (bgp->rfapi_cfg->redist_mode) { | |
2657 | case VNC_REDIST_MODE_PLAIN: | |
2658 | vnc_import_bgp_add_route_mode_plain(bgp, prefix, info); | |
2659 | break; | |
2660 | ||
2661 | case VNC_REDIST_MODE_RFG: | |
2662 | if (bgp->rfapi_cfg->rfg_redist) | |
2663 | vnc_import_bgp_add_route_mode_nvegroup( | |
2664 | bgp, prefix, info, bgp->rfapi_cfg->rfg_redist); | |
2665 | else | |
2666 | vnc_zlog_debug_verbose("%s: mode RFG but no redist RFG", | |
2667 | __func__); | |
2668 | break; | |
2669 | ||
2670 | case VNC_REDIST_MODE_RESOLVE_NVE: | |
2671 | vnc_import_bgp_add_route_mode_resolve_nve(bgp, prefix, info); | |
2672 | break; | |
2673 | } | |
2674 | #if DEBUG_RHN_LIST | |
2675 | print_rhn_list(__func__, "LEAVE "); | |
2676 | #endif | |
2677 | VNC_RHNCK(leave); | |
2678 | } | |
2679 | ||
2680 | /* | |
2681 | * "Withdrawing a Route" import process | |
2682 | */ | |
2683 | void vnc_import_bgp_del_route(struct bgp *bgp, struct prefix *prefix, | |
2684 | struct bgp_info *info) /* unicast info */ | |
2685 | { | |
2686 | afi_t afi = family2afi(prefix->family); | |
2687 | ||
2688 | assert(afi); | |
2689 | ||
2690 | { | |
2691 | struct prefix pfx_nexthop; | |
2692 | char buf[PREFIX_STRLEN]; | |
2693 | char buf_nh[PREFIX_STRLEN]; | |
2694 | ||
2695 | prefix2str(prefix, buf, sizeof(buf)); | |
2696 | rfapiUnicastNexthop2Prefix(afi, info->attr, &pfx_nexthop); | |
2697 | prefix2str(&pfx_nexthop, buf_nh, sizeof(buf_nh)); | |
2698 | ||
2699 | vnc_zlog_debug_verbose("%s: pfx %s, nh %s", __func__, buf, | |
2700 | buf_nh); | |
2701 | } | |
2702 | #if DEBUG_RHN_LIST | |
2703 | print_rhn_list(__func__, "ENTER "); | |
2704 | #endif | |
2705 | VNC_RHNCK(enter); | |
2706 | ||
2707 | if (!bgp->rfapi_cfg) { | |
2708 | vnc_zlog_debug_verbose("%s: bgp->rfapi_cfg is NULL, skipping", | |
2709 | __func__); | |
2710 | return; | |
2711 | } | |
2712 | ||
2713 | /* check bgp redist flag for vnc direct ("vpn") routes */ | |
2714 | if (!bgp->rfapi_cfg->redist[afi][ZEBRA_ROUTE_BGP_DIRECT]) { | |
2715 | vnc_zlog_debug_verbose( | |
2716 | "%s: bgp redistribution of afi=%d VNC direct routes is off", | |
2717 | __func__, afi); | |
2718 | return; | |
2719 | } | |
2720 | ||
2721 | switch (bgp->rfapi_cfg->redist_mode) { | |
2722 | case VNC_REDIST_MODE_PLAIN: | |
2723 | vnc_import_bgp_del_route_mode_plain(bgp, prefix, info); | |
2724 | break; | |
2725 | ||
2726 | case VNC_REDIST_MODE_RFG: | |
2727 | if (bgp->rfapi_cfg->rfg_redist) | |
2728 | vnc_import_bgp_del_route_mode_nvegroup(bgp, prefix, | |
2729 | info); | |
2730 | else | |
2731 | vnc_zlog_debug_verbose("%s: mode RFG but no redist RFG", | |
2732 | __func__); | |
2733 | break; | |
2734 | ||
2735 | case VNC_REDIST_MODE_RESOLVE_NVE: | |
2736 | vnc_import_bgp_del_route_mode_resolve_nve(bgp, afi, prefix, | |
2737 | info); | |
2738 | break; | |
2739 | } | |
2740 | #if DEBUG_RHN_LIST | |
2741 | print_rhn_list(__func__, "LEAVE "); | |
2742 | #endif | |
2743 | VNC_RHNCK(leave); | |
2744 | } | |
2745 | ||
2746 | ||
2747 | /*********************************************************************** | |
2748 | * Enable/Disable | |
2749 | ***********************************************************************/ | |
2750 | ||
2751 | void vnc_import_bgp_redist_enable(struct bgp *bgp, afi_t afi) | |
2752 | { | |
2753 | /* iterate over bgp unicast v4 and v6 routes, call | |
2754 | * vnc_import_bgp_add_route */ | |
2755 | ||
2756 | struct bgp_node *rn; | |
2757 | ||
2758 | vnc_zlog_debug_verbose("%s: entry, afi=%d", __func__, afi); | |
2759 | ||
2760 | if (bgp->rfapi_cfg->redist[afi][ZEBRA_ROUTE_BGP_DIRECT]) { | |
2761 | vnc_zlog_debug_verbose( | |
2762 | "%s: already enabled for afi %d, skipping", __func__, | |
2763 | afi); | |
2764 | return; | |
2765 | } | |
2766 | bgp->rfapi_cfg->redist[afi][ZEBRA_ROUTE_BGP_DIRECT] = 1; | |
2767 | ||
2768 | for (rn = bgp_table_top(bgp->rib[afi][SAFI_UNICAST]); rn; | |
2769 | rn = bgp_route_next(rn)) { | |
2770 | ||
2771 | struct bgp_info *bi; | |
2772 | ||
2773 | for (bi = rn->info; bi; bi = bi->next) { | |
2774 | ||
2775 | if (CHECK_FLAG(bi->flags, BGP_INFO_REMOVED)) | |
2776 | continue; | |
2777 | ||
2778 | vnc_import_bgp_add_route(bgp, &rn->p, bi); | |
2779 | } | |
2780 | } | |
2781 | vnc_zlog_debug_verbose( | |
2782 | "%s: set redist[afi=%d][type=%d=ZEBRA_ROUTE_BGP_DIRECT] return", | |
2783 | __func__, afi, ZEBRA_ROUTE_BGP_DIRECT); | |
2784 | } | |
2785 | ||
2786 | void vnc_import_bgp_exterior_redist_enable(struct bgp *bgp, afi_t afi) | |
2787 | { | |
2788 | struct bgp *bgp_exterior; | |
2789 | struct bgp_node *rn; | |
2790 | ||
2791 | bgp_exterior = bgp->rfapi_cfg->redist_bgp_exterior_view; | |
2792 | ||
2793 | if (bgp->rfapi_cfg->redist[afi][ZEBRA_ROUTE_BGP_DIRECT_EXT]) { | |
2794 | vnc_zlog_debug_verbose( | |
2795 | "%s: already enabled for afi %d, skipping", __func__, | |
2796 | afi); | |
2797 | return; | |
2798 | } | |
2799 | bgp->rfapi_cfg->redist[afi][ZEBRA_ROUTE_BGP_DIRECT_EXT] = 1; | |
2800 | ||
2801 | if (!bgp_exterior) { | |
2802 | vnc_zlog_debug_verbose( | |
2803 | "%s: no exterior view set yet, no routes to import yet", | |
2804 | __func__); | |
2805 | return; | |
2806 | } | |
2807 | ||
2808 | for (rn = bgp_table_top(bgp_exterior->rib[afi][SAFI_UNICAST]); rn; | |
2809 | rn = bgp_route_next(rn)) { | |
2810 | ||
2811 | struct bgp_info *bi; | |
2812 | ||
2813 | for (bi = rn->info; bi; bi = bi->next) { | |
2814 | ||
2815 | if (CHECK_FLAG(bi->flags, BGP_INFO_REMOVED)) | |
2816 | continue; | |
2817 | ||
2818 | vnc_import_bgp_exterior_add_route(bgp_exterior, &rn->p, | |
2819 | bi); | |
2820 | } | |
2821 | } | |
2822 | vnc_zlog_debug_verbose( | |
2823 | "%s: set redist[afi=%d][type=%d=ZEBRA_ROUTE_BGP_DIRECT] return", | |
2824 | __func__, afi, ZEBRA_ROUTE_BGP_DIRECT); | |
2825 | } | |
2826 | ||
2827 | /* | |
2828 | * This function is for populating a newly-created Import Table | |
2829 | */ | |
2830 | void vnc_import_bgp_exterior_redist_enable_it( | |
2831 | struct bgp *bgp, afi_t afi, struct rfapi_import_table *it_only) | |
2832 | { | |
2833 | struct bgp *bgp_exterior; | |
2834 | struct bgp_node *rn; | |
2835 | ||
2836 | vnc_zlog_debug_verbose("%s: entry", __func__); | |
2837 | ||
2838 | bgp_exterior = bgp->rfapi_cfg->redist_bgp_exterior_view; | |
2839 | ||
2840 | if (!bgp->rfapi_cfg->redist[afi][ZEBRA_ROUTE_BGP_DIRECT_EXT]) { | |
2841 | vnc_zlog_debug_verbose("%s: not enabled for afi %d, skipping", | |
2842 | __func__, afi); | |
2843 | return; | |
2844 | } | |
2845 | ||
2846 | if (!bgp_exterior) { | |
2847 | vnc_zlog_debug_verbose( | |
2848 | "%s: no exterior view set yet, no routes to import yet", | |
2849 | __func__); | |
2850 | return; | |
2851 | } | |
2852 | ||
2853 | for (rn = bgp_table_top(bgp_exterior->rib[afi][SAFI_UNICAST]); rn; | |
2854 | rn = bgp_route_next(rn)) { | |
2855 | ||
2856 | struct bgp_info *bi; | |
2857 | ||
2858 | for (bi = rn->info; bi; bi = bi->next) { | |
2859 | ||
2860 | if (CHECK_FLAG(bi->flags, BGP_INFO_REMOVED)) | |
2861 | continue; | |
2862 | ||
2863 | vnc_import_bgp_exterior_add_route_it( | |
2864 | bgp_exterior, &rn->p, bi, it_only); | |
2865 | } | |
2866 | } | |
2867 | } | |
2868 | ||
2869 | ||
2870 | void vnc_import_bgp_redist_disable(struct bgp *bgp, afi_t afi) | |
2871 | { | |
2872 | /* | |
2873 | * iterate over vpn routes, find routes of type ZEBRA_ROUTE_BGP_DIRECT, | |
2874 | * delete (call timer expire immediately) | |
2875 | */ | |
2876 | struct bgp_node *rn1; | |
2877 | struct bgp_node *rn2; | |
2878 | ||
2879 | vnc_zlog_debug_verbose("%s: entry", __func__); | |
2880 | ||
2881 | if (!bgp->rfapi_cfg->redist[afi][ZEBRA_ROUTE_BGP_DIRECT]) { | |
2882 | vnc_zlog_debug_verbose( | |
2883 | "%s: already disabled for afi %d, skipping", __func__, | |
2884 | afi); | |
2885 | return; | |
2886 | } | |
2887 | ||
2888 | /* | |
2889 | * Two-level table for SAFI_MPLS_VPN | |
2890 | * Be careful when changing the things we iterate over | |
2891 | */ | |
2892 | for (rn1 = bgp_table_top(bgp->rib[afi][SAFI_MPLS_VPN]); rn1; | |
2893 | rn1 = bgp_route_next(rn1)) { | |
2894 | ||
2895 | if (rn1->info) { | |
2896 | for (rn2 = bgp_table_top(rn1->info); rn2; | |
2897 | rn2 = bgp_route_next(rn2)) { | |
2898 | ||
2899 | struct bgp_info *bi; | |
2900 | struct bgp_info *nextbi; | |
2901 | ||
2902 | for (bi = rn2->info; bi; bi = nextbi) { | |
2903 | ||
2904 | nextbi = bi->next; | |
2905 | ||
2906 | if (bi->type | |
2907 | == ZEBRA_ROUTE_BGP_DIRECT) { | |
2908 | ||
2909 | struct rfapi_descriptor *rfd; | |
2910 | vncHDBgpDirect.peer = bi->peer; | |
2911 | ||
2912 | assert(bi->extra); | |
2913 | ||
2914 | rfd = bi->extra->vnc.export | |
2915 | .rfapi_handle; | |
2916 | ||
2917 | vnc_zlog_debug_verbose( | |
2918 | "%s: deleting bi=%p, bi->peer=%p, bi->type=%d, bi->sub_type=%d, bi->extra->vnc.export.rfapi_handle=%p [passing rfd=%p]", | |
2919 | __func__, bi, bi->peer, | |
2920 | bi->type, bi->sub_type, | |
2921 | (bi->extra | |
2922 | ? bi->extra | |
2923 | ->vnc | |
2924 | .export | |
2925 | .rfapi_handle | |
2926 | : NULL), | |
2927 | rfd); | |
2928 | ||
2929 | ||
2930 | del_vnc_route( | |
2931 | rfd, bi->peer, bgp, | |
2932 | SAFI_MPLS_VPN, &rn2->p, | |
2933 | (struct prefix_rd *)&rn1 | |
2934 | ->p, | |
2935 | bi->type, bi->sub_type, | |
2936 | NULL, 1); /* kill */ | |
2937 | ||
2938 | vncHDBgpDirect.peer = NULL; | |
2939 | } | |
2940 | } | |
2941 | } | |
2942 | } | |
2943 | } | |
2944 | /* Clear RHN list */ | |
2945 | if (bgp->rfapi->resolve_nve_nexthop) { | |
2946 | struct prefix_bag *pb; | |
2947 | struct bgp_info *info; | |
2948 | while (!skiplist_first(bgp->rfapi->resolve_nve_nexthop, NULL, | |
2949 | (void *)&pb)) { | |
2950 | info = pb->ubi; | |
2951 | skiplist_delete_first(bgp->rfapi->resolve_nve_nexthop); | |
2952 | bgp_info_unlock(info); | |
2953 | } | |
2954 | } | |
2955 | ||
2956 | bgp->rfapi_cfg->redist[afi][ZEBRA_ROUTE_BGP_DIRECT] = 0; | |
2957 | vnc_zlog_debug_verbose("%s: return", __func__); | |
2958 | } | |
2959 | ||
2960 | ||
2961 | void vnc_import_bgp_exterior_redist_disable(struct bgp *bgp, afi_t afi) | |
2962 | { | |
2963 | struct rfapi_cfg *hc = bgp->rfapi_cfg; | |
2964 | struct bgp *bgp_exterior = hc->redist_bgp_exterior_view; | |
2965 | ||
2966 | vnc_zlog_debug_verbose("%s: entry", __func__); | |
2967 | ||
2968 | if (!hc->redist[afi][ZEBRA_ROUTE_BGP_DIRECT_EXT]) { | |
2969 | vnc_zlog_debug_verbose( | |
2970 | "%s: already disabled for afi %d, skipping", __func__, | |
2971 | afi); | |
2972 | return; | |
2973 | } | |
2974 | ||
2975 | if (!bgp_exterior) { | |
2976 | vnc_zlog_debug_verbose( | |
2977 | "%s: bgp exterior view not defined, skipping", | |
2978 | __func__); | |
2979 | return; | |
2980 | } | |
2981 | ||
2982 | ||
2983 | { | |
2984 | struct bgp_node *rn; | |
2985 | for (rn = bgp_table_top(bgp_exterior->rib[afi][SAFI_UNICAST]); | |
2986 | rn; rn = bgp_route_next(rn)) { | |
2987 | ||
2988 | struct bgp_info *bi; | |
2989 | ||
2990 | for (bi = rn->info; bi; bi = bi->next) { | |
2991 | ||
2992 | if (CHECK_FLAG(bi->flags, BGP_INFO_REMOVED)) | |
2993 | continue; | |
2994 | ||
2995 | vnc_import_bgp_exterior_del_route(bgp_exterior, | |
2996 | &rn->p, bi); | |
2997 | } | |
2998 | } | |
2999 | #if DEBUG_RHN_LIST | |
3000 | print_rhn_list(__func__, NULL); | |
3001 | #endif | |
3002 | } | |
3003 | ||
3004 | bgp->rfapi_cfg->redist[afi][ZEBRA_ROUTE_BGP_DIRECT_EXT] = 0; | |
3005 | vnc_zlog_debug_verbose("%s: return", __func__); | |
3006 | } |