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d62a17ae | 1 | /* |
65efcfce LB |
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 | * | |
896014f4 DL |
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 | |
65efcfce LB |
19 | */ |
20 | ||
21 | /* | |
22 | * File: vnc_import_bgp.c | |
23 | * Purpose: Import routes from BGP unicast directly (not via zebra) | |
24 | */ | |
25 | ||
f8b6f499 LB |
26 | #include "lib/zebra.h" |
27 | #include "lib/prefix.h" | |
28 | #include "lib/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" | |
65efcfce | 35 | |
f8b6f499 LB |
36 | #include "bgpd/bgpd.h" |
37 | #include "bgpd/bgp_ecommunity.h" | |
38 | #include "bgpd/bgp_attr.h" | |
b2f0fa55 | 39 | #include "bgpd/bgp_route.h" |
d62a17ae | 40 | #include "bgpd/bgp_mplsvpn.h" /* for RD_TYPE_IP */ |
65efcfce | 41 | |
f8b6f499 LB |
42 | #include "bgpd/rfapi/vnc_export_bgp.h" |
43 | #include "bgpd/rfapi/bgp_rfapi_cfg.h" | |
44 | #include "bgpd/rfapi/rfapi.h" | |
45 | #include "bgpd/rfapi/rfapi_import.h" | |
46 | #include "bgpd/rfapi/rfapi_private.h" | |
47 | #include "bgpd/rfapi/rfapi_monitor.h" | |
48 | #include "bgpd/rfapi/rfapi_vty.h" | |
49 | #include "bgpd/rfapi/vnc_import_bgp.h" | |
50 | #include "bgpd/rfapi/vnc_import_bgp_p.h" | |
51 | #include "bgpd/rfapi/vnc_debug.h" | |
65efcfce LB |
52 | |
53 | #define ENABLE_VNC_RHNCK | |
54 | ||
55 | #define DEBUG_RHN_LIST 0 | |
56 | ||
57 | static struct rfapi_descriptor vncHDBgpDirect; /* dummy nve descriptor */ | |
58 | static struct rfapi_descriptor vncHDResolveNve; /* dummy nve descriptor */ | |
59 | ||
60 | /* | |
61 | * For routes from another AS: | |
62 | * | |
63 | * If MED is set, | |
64 | * LOCAL_PREF = 255 - MIN(255, MED) | |
65 | * else | |
66 | * LOCAL_PREF = default_local_pref | |
67 | * | |
68 | * For routes from the same AS: | |
69 | * | |
70 | * LOCAL_PREF unchanged | |
71 | */ | |
d62a17ae | 72 | uint32_t calc_local_pref(struct attr *attr, struct peer *peer) |
65efcfce | 73 | { |
d62a17ae | 74 | uint32_t local_pref = 0; |
75 | ||
76 | if (!attr) { | |
77 | if (peer) { | |
78 | return peer->bgp->default_local_pref; | |
79 | } | |
80 | return bgp_get_default()->default_local_pref; | |
81 | } | |
82 | ||
83 | if (peer && (peer->as != peer->bgp->as)) { | |
84 | if (attr->flag & ATTR_FLAG_BIT(BGP_ATTR_MULTI_EXIT_DISC)) { | |
85 | if (attr->med > 255) { | |
86 | local_pref = 0; | |
87 | } else { | |
88 | local_pref = 255 - attr->med; | |
89 | } | |
90 | } else { | |
91 | local_pref = peer->bgp->default_local_pref; | |
92 | } | |
93 | } else { | |
94 | if (attr->flag & ATTR_FLAG_BIT(BGP_ATTR_LOCAL_PREF)) { | |
95 | local_pref = attr->local_pref; | |
96 | } else { | |
97 | if (peer && peer->bgp) { | |
98 | local_pref = peer->bgp->default_local_pref; | |
99 | } | |
100 | } | |
101 | } | |
102 | ||
103 | return local_pref; | |
65efcfce LB |
104 | } |
105 | ||
d62a17ae | 106 | static int is_host_prefix(struct prefix *p) |
65efcfce | 107 | { |
d62a17ae | 108 | switch (p->family) { |
109 | case AF_INET: | |
110 | return (p->prefixlen == 32); | |
111 | case AF_INET6: | |
112 | return (p->prefixlen == 128); | |
113 | } | |
114 | return 0; | |
65efcfce LB |
115 | } |
116 | ||
117 | /*********************************************************************** | |
118 | * RHN list | |
119 | ***********************************************************************/ | |
120 | ||
d62a17ae | 121 | struct prefix_bag { |
122 | struct prefix hpfx; /* ce address = unicast nexthop */ | |
123 | struct prefix upfx; /* unicast prefix */ | |
124 | struct bgp_info *ubi; /* unicast route */ | |
65efcfce LB |
125 | }; |
126 | ||
d62a17ae | 127 | static const u_char maskbit[] = {0x00, 0x80, 0xc0, 0xe0, 0xf0, |
128 | 0xf8, 0xfc, 0xfe, 0xff}; | |
65efcfce | 129 | |
d62a17ae | 130 | int vnc_prefix_cmp(void *pfx1, void *pfx2) |
65efcfce | 131 | { |
d62a17ae | 132 | int offset; |
133 | int shift; | |
134 | u_char mask; | |
135 | ||
136 | struct prefix *p1 = pfx1; | |
137 | struct prefix *p2 = pfx2; | |
138 | ||
139 | if (p1->family < p2->family) | |
140 | return -1; | |
141 | if (p1->family > p2->family) | |
142 | return 1; | |
143 | ||
144 | if (p1->prefixlen < p2->prefixlen) | |
145 | return -1; | |
146 | if (p1->prefixlen > p2->prefixlen) | |
147 | return 1; | |
148 | ||
149 | offset = p1->prefixlen / 8; | |
150 | shift = p1->prefixlen % 8; | |
151 | if (shift == 0 && offset) { /* catch aligned case */ | |
152 | offset--; | |
153 | shift = 8; | |
154 | } | |
155 | ||
156 | /* Set both prefix's head pointer. */ | |
157 | const u_char *pp1 = (const u_char *)&p1->u.prefix; | |
158 | const u_char *pp2 = (const u_char *)&p2->u.prefix; | |
159 | ||
160 | while (offset--) { | |
161 | if (*pp1 < *pp2) | |
162 | return -1; | |
163 | if (*pp1 > *pp2) | |
164 | return 1; | |
165 | ++pp1; | |
166 | ++pp2; | |
167 | } | |
168 | ||
169 | mask = maskbit[shift]; | |
170 | if ((*pp1 & mask) < (*pp2 & mask)) | |
171 | return -1; | |
172 | if ((*pp1 & mask) > (*pp2 & mask)) | |
173 | return 1; | |
174 | ||
175 | return 0; | |
65efcfce LB |
176 | } |
177 | ||
d62a17ae | 178 | static void prefix_bag_free(void *pb) |
65efcfce | 179 | { |
d62a17ae | 180 | XFREE(MTYPE_RFAPI_PREFIX_BAG, pb); |
65efcfce LB |
181 | } |
182 | ||
183 | #if DEBUG_RHN_LIST | |
d62a17ae | 184 | static void print_rhn_list(const char *tag1, const char *tag2) |
65efcfce | 185 | { |
d62a17ae | 186 | struct bgp *bgp; |
187 | struct skiplist *sl; | |
188 | struct skiplistnode *p; | |
189 | struct prefix_bag *pb; | |
190 | int count = 0; | |
191 | ||
192 | bgp = bgp_get_default(); | |
193 | if (!bgp) | |
194 | return; | |
195 | ||
196 | sl = bgp->frapi->resolve_nve_nexthop; | |
197 | if (!sl) { | |
198 | vnc_zlog_debug_verbose("%s: %s: RHN List is empty", | |
199 | (tag1 ? tag1 : ""), (tag2 ? tag2 : "")); | |
200 | return; | |
201 | } | |
202 | ||
203 | vnc_zlog_debug_verbose("%s: %s: RHN list:", (tag1 ? tag1 : ""), | |
204 | (tag2 ? tag2 : "")); | |
205 | ||
206 | /* XXX uses secret knowledge of skiplist structure */ | |
207 | for (p = sl->header->forward[0]; p; p = p->forward[0]) { | |
208 | char kbuf[BUFSIZ]; | |
209 | char hbuf[BUFSIZ]; | |
210 | char ubuf[BUFSIZ]; | |
211 | ||
212 | pb = p->value; | |
213 | ||
214 | prefix2str(p->key, kbuf, BUFSIZ); | |
215 | prefix2str(&pb->hpfx, hbuf, BUFSIZ); | |
216 | prefix2str(&pb->upfx, ubuf, BUFSIZ); | |
217 | ||
218 | vnc_zlog_debug_verbose( | |
219 | "RHN Entry %d (q=%p): kpfx=%s, upfx=%s, hpfx=%s, ubi=%p", | |
220 | ++count, p, kbuf, ubuf, hbuf, pb->ubi); | |
221 | } | |
65efcfce LB |
222 | } |
223 | #endif | |
224 | ||
225 | #ifdef ENABLE_VNC_RHNCK | |
d62a17ae | 226 | static void vnc_rhnck(char *tag) |
65efcfce | 227 | { |
d62a17ae | 228 | struct bgp *bgp; |
229 | struct skiplist *sl; | |
230 | struct skiplistnode *p; | |
231 | ||
232 | bgp = bgp_get_default(); | |
233 | if (!bgp) | |
234 | return; | |
235 | sl = bgp->rfapi->resolve_nve_nexthop; | |
236 | ||
237 | if (!sl) | |
238 | return; | |
239 | ||
240 | /* XXX uses secret knowledge of skiplist structure */ | |
241 | for (p = sl->header->forward[0]; p; p = p->forward[0]) { | |
242 | struct prefix_bag *pb; | |
243 | struct prefix *pkey; | |
244 | afi_t afi; | |
245 | struct prefix pfx_orig_nexthop; | |
246 | ||
247 | memset(&pfx_orig_nexthop, 0, | |
248 | sizeof(struct prefix)); /* keep valgrind happy */ | |
249 | ||
250 | pkey = p->key; | |
251 | pb = p->value; | |
252 | ||
253 | afi = family2afi(pb->upfx.family); | |
254 | ||
255 | rfapiUnicastNexthop2Prefix(afi, pb->ubi->attr, | |
256 | &pfx_orig_nexthop); | |
257 | ||
258 | /* pb->hpfx, pb->ubi nexthop, pkey should all reflect the same | |
259 | * pfx */ | |
260 | assert(!vnc_prefix_cmp(&pb->hpfx, pkey)); | |
261 | if (vnc_prefix_cmp(&pb->hpfx, &pfx_orig_nexthop)) { | |
262 | char str_onh[BUFSIZ]; | |
263 | char str_nve_pfx[BUFSIZ]; | |
264 | ||
265 | prefix2str(&pfx_orig_nexthop, str_onh, BUFSIZ); | |
266 | str_onh[BUFSIZ - 1] = 0; | |
267 | ||
268 | prefix2str(&pb->hpfx, str_nve_pfx, BUFSIZ); | |
269 | str_nve_pfx[BUFSIZ - 1] = 0; | |
270 | ||
271 | vnc_zlog_debug_verbose( | |
272 | "%s: %s: FATAL: resolve_nve_nexthop list item bi nexthop %s != nve pfx %s", | |
273 | __func__, tag, str_onh, str_nve_pfx); | |
274 | assert(0); | |
275 | } | |
276 | } | |
277 | vnc_zlog_debug_verbose("%s: vnc_rhnck OK", tag); | |
65efcfce LB |
278 | } |
279 | ||
280 | #define VNC_RHNCK(n) do {char buf[BUFSIZ];sprintf(buf,"%s: %s", __func__, #n);vnc_rhnck(buf);} while (0) | |
281 | ||
282 | #else | |
283 | ||
284 | #define VNC_RHNCK(n) | |
285 | ||
286 | #endif | |
287 | ||
288 | /*********************************************************************** | |
289 | * Add/Delete Unicast Route | |
290 | ***********************************************************************/ | |
291 | ||
292 | /* | |
293 | * "Adding a Route" import process | |
294 | */ | |
295 | ||
296 | /* | |
297 | * extract and package information from the BGP unicast route. | |
298 | * Return code 0 means OK, non-0 means drop. | |
299 | * | |
300 | * If return code is 0, caller MUST release ecom | |
301 | */ | |
d62a17ae | 302 | static int process_unicast_route(struct bgp *bgp, /* in */ |
303 | afi_t afi, /* in */ | |
304 | struct prefix *prefix, /* in */ | |
305 | struct bgp_info *info, /* in */ | |
306 | struct ecommunity **ecom, /* OUT */ | |
307 | struct prefix *unicast_nexthop) /* OUT */ | |
65efcfce | 308 | { |
d62a17ae | 309 | struct rfapi_cfg *hc = bgp->rfapi_cfg; |
310 | struct peer *peer = info->peer; | |
311 | struct attr *attr = info->attr; | |
312 | struct attr hattr; | |
313 | struct route_map *rmap = NULL; | |
314 | struct prefix pfx_orig_nexthop; | |
315 | ||
316 | memset(&pfx_orig_nexthop, 0, | |
317 | sizeof(struct prefix)); /* keep valgrind happy */ | |
318 | ||
319 | /* | |
320 | * prefix list check | |
321 | */ | |
322 | if (hc->plist_redist[ZEBRA_ROUTE_BGP_DIRECT][afi]) { | |
323 | vnc_zlog_debug_verbose("%s: HC prefix list is set, checking", | |
324 | __func__); | |
325 | if (prefix_list_apply( | |
326 | hc->plist_redist[ZEBRA_ROUTE_BGP_DIRECT][afi], | |
327 | prefix) | |
328 | == PREFIX_DENY) { | |
329 | vnc_zlog_debug_verbose( | |
330 | "%s: prefix list returns DENY, blocking route", | |
331 | __func__); | |
332 | return -1; | |
333 | } | |
334 | vnc_zlog_debug_verbose( | |
335 | "%s: prefix list returns PASS, allowing route", | |
336 | __func__); | |
337 | } | |
338 | ||
339 | /* apply routemap, if any, later */ | |
340 | rmap = hc->routemap_redist[ZEBRA_ROUTE_BGP_DIRECT]; | |
341 | ||
342 | /* | |
343 | * Extract original nexthop, which we expect to be a NVE connected | |
344 | * router | |
345 | * Note that this is the nexthop before any possible application of | |
346 | * policy | |
347 | */ | |
348 | /* | |
349 | * Incoming prefix is unicast. If v6, it is in multiprotocol area, | |
350 | * but if v4 it is in attr->nexthop | |
351 | */ | |
352 | rfapiUnicastNexthop2Prefix(afi, attr, &pfx_orig_nexthop); | |
353 | ||
354 | /* | |
355 | * route map handling | |
356 | * This code is here because it allocates an interned attr which | |
357 | * must be freed before we return. It's easier to put it after | |
358 | * all of the possible returns above. | |
359 | */ | |
360 | memset(&hattr, 0, sizeof(struct attr)); | |
361 | bgp_attr_dup(&hattr, attr); /* hattr becomes a ghost attr */ | |
362 | ||
363 | if (rmap) { | |
364 | struct bgp_info info; | |
365 | route_map_result_t ret; | |
366 | ||
367 | memset(&info, 0, sizeof(info)); | |
368 | info.peer = peer; | |
369 | info.attr = &hattr; | |
370 | ret = route_map_apply(rmap, prefix, RMAP_BGP, &info); | |
371 | if (ret == RMAP_DENYMATCH) { | |
372 | bgp_attr_flush(&hattr); | |
373 | vnc_zlog_debug_verbose( | |
374 | "%s: route map \"%s\" says DENY, returning", | |
375 | __func__, rmap->name); | |
376 | return -1; | |
377 | } | |
378 | } | |
379 | ||
380 | /* | |
381 | * Get the (possibly altered by policy) unicast nexthop | |
382 | * for later lookup in the Import Table by caller | |
383 | */ | |
384 | rfapiUnicastNexthop2Prefix(afi, &hattr, unicast_nexthop); | |
385 | ||
386 | if (hattr.ecommunity) | |
387 | *ecom = ecommunity_dup(hattr.ecommunity); | |
388 | else | |
389 | *ecom = ecommunity_new(); | |
390 | ||
391 | /* | |
392 | * Done with hattr, clean up | |
393 | */ | |
394 | bgp_attr_flush(&hattr); | |
395 | ||
396 | /* | |
397 | * Add EC that carries original NH of iBGP route (2 bytes = magic | |
398 | * value indicating it came from an VNC gateway; default 5226, but | |
399 | * must be user configurable). Note that this is the nexthop before | |
400 | * any application of policy. | |
401 | */ | |
402 | { | |
403 | struct ecommunity_val vnc_gateway_magic; | |
404 | uint16_t localadmin; | |
405 | ||
406 | /* Using route origin extended community type */ | |
407 | memset(&vnc_gateway_magic, 0, sizeof(vnc_gateway_magic)); | |
408 | vnc_gateway_magic.val[0] = 0x01; | |
409 | vnc_gateway_magic.val[1] = 0x03; | |
410 | ||
411 | /* Only works for IPv4 nexthops */ | |
412 | if (prefix->family == AF_INET) { | |
413 | memcpy(vnc_gateway_magic.val + 2, | |
414 | &unicast_nexthop->u.prefix4, 4); | |
415 | } | |
416 | localadmin = htons(hc->resolve_nve_roo_local_admin); | |
417 | memcpy(vnc_gateway_magic.val + 6, (char *)&localadmin, 2); | |
418 | ||
419 | ecommunity_add_val(*ecom, &vnc_gateway_magic); | |
420 | } | |
421 | ||
422 | return 0; | |
65efcfce LB |
423 | } |
424 | ||
425 | ||
d62a17ae | 426 | static void vnc_import_bgp_add_route_mode_resolve_nve_one_bi( |
427 | struct bgp *bgp, afi_t afi, struct bgp_info *bi, /* VPN bi */ | |
428 | struct prefix_rd *prd, /* RD */ | |
429 | struct prefix *prefix, /* unicast route prefix */ | |
430 | uint32_t *local_pref, /* NULL = no local_pref */ | |
431 | uint32_t *med, /* NULL = no med */ | |
432 | struct ecommunity *ecom) /* generated ecoms */ | |
65efcfce | 433 | { |
d62a17ae | 434 | struct prefix un; |
435 | struct prefix nexthop; | |
436 | struct rfapi_ip_addr nexthop_h; | |
437 | uint32_t lifetime; | |
438 | uint32_t *plifetime; | |
439 | struct bgp_attr_encap_subtlv *encaptlvs; | |
440 | uint32_t label = 0; | |
441 | ||
442 | struct rfapi_un_option optary[3]; | |
443 | struct rfapi_un_option *opt = NULL; | |
444 | int cur_opt = 0; | |
65efcfce | 445 | |
d62a17ae | 446 | vnc_zlog_debug_verbose("%s: entry", __func__); |
447 | ||
448 | if (bi->type != ZEBRA_ROUTE_BGP && bi->type != ZEBRA_ROUTE_BGP_DIRECT) { | |
449 | ||
450 | return; | |
451 | } | |
452 | if (bi->sub_type != BGP_ROUTE_NORMAL && bi->sub_type != BGP_ROUTE_STATIC | |
453 | && bi->sub_type != BGP_ROUTE_RFP) { | |
454 | ||
455 | return; | |
456 | } | |
457 | if (CHECK_FLAG(bi->flags, BGP_INFO_REMOVED)) | |
458 | return; | |
459 | ||
460 | vncHDResolveNve.peer = bi->peer; | |
461 | if (!rfapiGetVncTunnelUnAddr(bi->attr, &un)) { | |
462 | if (rfapiQprefix2Raddr(&un, &vncHDResolveNve.un_addr)) | |
463 | return; | |
464 | } else { | |
465 | memset(&vncHDResolveNve.un_addr, 0, | |
466 | sizeof(vncHDResolveNve.un_addr)); | |
467 | } | |
468 | ||
469 | /* Use nexthop of VPN route as nexthop of constructed route */ | |
470 | rfapiNexthop2Prefix(bi->attr, &nexthop); | |
471 | rfapiQprefix2Raddr(&nexthop, &nexthop_h); | |
472 | ||
473 | if (rfapiGetVncLifetime(bi->attr, &lifetime)) { | |
474 | plifetime = NULL; | |
475 | } else { | |
476 | plifetime = &lifetime; | |
477 | } | |
478 | ||
479 | if (bi->attr) { | |
480 | encaptlvs = bi->attr->vnc_subtlvs; | |
481 | if (bi->attr->encap_tunneltype != BGP_ENCAP_TYPE_RESERVED | |
482 | && bi->attr->encap_tunneltype != BGP_ENCAP_TYPE_MPLS) { | |
483 | if (opt != NULL) | |
484 | opt->next = &optary[cur_opt]; | |
485 | opt = &optary[cur_opt++]; | |
486 | memset(opt, 0, sizeof(struct rfapi_un_option)); | |
487 | opt->type = RFAPI_UN_OPTION_TYPE_TUNNELTYPE; | |
488 | opt->v.tunnel.type = bi->attr->encap_tunneltype; | |
489 | /* TBD parse bi->attr->extra->encap_subtlvs */ | |
490 | } | |
491 | } else { | |
492 | encaptlvs = NULL; | |
493 | } | |
494 | ||
495 | struct ecommunity *new_ecom = ecommunity_dup(ecom); | |
496 | ||
497 | if (bi->attr && bi->attr->ecommunity) | |
498 | ecommunity_merge(new_ecom, bi->attr->ecommunity); | |
499 | ||
500 | if (bi->extra) | |
501 | label = decode_label(&bi->extra->label); | |
502 | ||
503 | add_vnc_route(&vncHDResolveNve, bgp, SAFI_MPLS_VPN, | |
504 | prefix, /* unicast route prefix */ | |
505 | prd, &nexthop_h, /* new nexthop */ | |
506 | local_pref, plifetime, | |
507 | (struct bgp_tea_options *)encaptlvs, /* RFP options */ | |
508 | opt, NULL, new_ecom, med, /* NULL => don't set med */ | |
509 | (label ? &label : NULL), /* NULL= default */ | |
510 | ZEBRA_ROUTE_BGP_DIRECT, BGP_ROUTE_REDISTRIBUTE, | |
511 | RFAPI_AHR_RFPOPT_IS_VNCTLV); /* flags */ | |
512 | ||
513 | ecommunity_free(&new_ecom); | |
65efcfce LB |
514 | } |
515 | ||
d62a17ae | 516 | static void vnc_import_bgp_add_route_mode_resolve_nve_one_rd( |
517 | struct prefix_rd *prd, /* RD */ | |
518 | struct bgp_table *table_rd, /* per-rd VPN route table */ | |
519 | afi_t afi, struct bgp *bgp, struct prefix *prefix, /* unicast prefix */ | |
520 | struct ecommunity *ecom, /* generated ecoms */ | |
521 | uint32_t *local_pref, /* NULL = no local_pref */ | |
522 | uint32_t *med, /* NULL = no med */ | |
523 | struct prefix *ubi_nexthop) /* unicast nexthop */ | |
65efcfce | 524 | { |
d62a17ae | 525 | struct bgp_node *bn; |
526 | struct bgp_info *bi; | |
65efcfce | 527 | |
d62a17ae | 528 | if (!table_rd) |
529 | return; | |
65efcfce | 530 | |
d62a17ae | 531 | { |
532 | char str_nh[BUFSIZ]; | |
65efcfce | 533 | |
d62a17ae | 534 | prefix2str(ubi_nexthop, str_nh, BUFSIZ); |
535 | str_nh[BUFSIZ - 1] = 0; | |
65efcfce | 536 | |
d62a17ae | 537 | vnc_zlog_debug_verbose("%s: ubi_nexthop=%s", __func__, str_nh); |
538 | } | |
65efcfce | 539 | |
d62a17ae | 540 | /* exact match */ |
541 | bn = bgp_node_lookup(table_rd, ubi_nexthop); | |
542 | if (!bn) { | |
543 | vnc_zlog_debug_verbose( | |
544 | "%s: no match in RD's table for ubi_nexthop", __func__); | |
545 | return; | |
546 | } | |
65efcfce | 547 | |
d62a17ae | 548 | /* Iterate over bgp_info items at this node */ |
549 | for (bi = bn->info; bi; bi = bi->next) { | |
65efcfce | 550 | |
d62a17ae | 551 | vnc_import_bgp_add_route_mode_resolve_nve_one_bi( |
552 | bgp, afi, bi, /* VPN bi */ | |
553 | prd, prefix, local_pref, med, ecom); | |
554 | } | |
65efcfce | 555 | |
d62a17ae | 556 | bgp_unlock_node(bn); |
65efcfce LB |
557 | } |
558 | ||
d62a17ae | 559 | static void vnc_import_bgp_add_route_mode_resolve_nve( |
560 | struct bgp *bgp, struct prefix *prefix, /* unicast prefix */ | |
561 | struct bgp_info *info) /* unicast info */ | |
65efcfce | 562 | { |
d62a17ae | 563 | afi_t afi = family2afi(prefix->family); |
564 | struct rfapi_cfg *hc = NULL; | |
565 | ||
566 | struct prefix pfx_unicast_nexthop = {0}; /* happy valgrind */ | |
567 | ||
568 | struct ecommunity *ecom = NULL; | |
569 | uint32_t local_pref; | |
570 | uint32_t *med = NULL; | |
571 | ||
572 | struct prefix_bag *pb; | |
573 | struct bgp_node *bnp; /* prd table node */ | |
574 | ||
575 | /*debugging */ | |
576 | { | |
577 | char str_pfx[BUFSIZ]; | |
578 | char str_nh[BUFSIZ]; | |
579 | struct prefix nh; | |
580 | ||
581 | prefix2str(prefix, str_pfx, BUFSIZ); | |
582 | str_pfx[BUFSIZ - 1] = 0; | |
583 | ||
584 | nh.prefixlen = 0; | |
585 | rfapiUnicastNexthop2Prefix(afi, info->attr, &nh); | |
586 | if (nh.prefixlen) { | |
587 | prefix2str(&nh, str_nh, BUFSIZ); | |
588 | str_nh[BUFSIZ - 1] = 0; | |
589 | } else { | |
590 | str_nh[0] = '?'; | |
591 | str_nh[1] = 0; | |
592 | } | |
593 | ||
594 | vnc_zlog_debug_verbose( | |
595 | "%s(bgp=%p, unicast prefix=%s, unicast nh=%s)", | |
596 | __func__, bgp, str_pfx, str_nh); | |
597 | } | |
598 | ||
599 | if (info->type != ZEBRA_ROUTE_BGP) { | |
600 | vnc_zlog_debug_verbose( | |
601 | "%s: unicast type %d=\"%s\" is not %d=%s, skipping", | |
602 | __func__, info->type, zebra_route_string(info->type), | |
603 | ZEBRA_ROUTE_BGP, "ZEBRA_ROUTE_BGP"); | |
604 | return; | |
605 | } | |
606 | ||
607 | /* | |
608 | * Preliminary checks | |
609 | */ | |
610 | ||
611 | if (!afi) { | |
612 | zlog_err("%s: can't get afi of prefix", __func__); | |
613 | return; | |
614 | } | |
615 | ||
616 | if (!(hc = bgp->rfapi_cfg)) { | |
617 | vnc_zlog_debug_verbose("%s: bgp->rfapi_cfg is NULL, skipping", | |
618 | __func__); | |
619 | return; | |
620 | } | |
621 | ||
622 | /* check vnc redist flag for bgp direct routes */ | |
623 | if (!bgp->rfapi_cfg->redist[afi][ZEBRA_ROUTE_BGP_DIRECT]) { | |
624 | vnc_zlog_debug_verbose( | |
625 | "%s: bgp->rfapi_cfg->redist[afi=%d][type=ZEBRA_ROUTE_BGP_DIRECT] is 0, skipping", | |
626 | __func__, afi); | |
627 | return; | |
628 | } | |
629 | ||
630 | ||
631 | if (process_unicast_route(bgp, afi, prefix, info, &ecom, | |
632 | &pfx_unicast_nexthop)) { | |
633 | ||
634 | vnc_zlog_debug_verbose( | |
635 | "%s: process_unicast_route error, skipping", __func__); | |
636 | return; | |
637 | } | |
638 | ||
639 | local_pref = calc_local_pref(info->attr, info->peer); | |
640 | if (info->attr | |
641 | && (info->attr->flag & ATTR_FLAG_BIT(BGP_ATTR_MULTI_EXIT_DISC))) { | |
642 | ||
643 | med = &info->attr->med; | |
644 | } | |
645 | ||
646 | ||
647 | /* | |
648 | * At this point, we have allocated: | |
649 | * | |
650 | * ecom ecommunity ptr, union of unicast and ROO parts (no NVE part) | |
651 | * | |
652 | * And we have set: | |
653 | * | |
654 | * pfx_unicast_nexthop nexthop of uncast route | |
655 | */ | |
656 | ||
657 | if (!bgp->rfapi->resolve_nve_nexthop) { | |
658 | bgp->rfapi->resolve_nve_nexthop = | |
659 | skiplist_new(SKIPLIST_FLAG_ALLOW_DUPLICATES, | |
660 | vnc_prefix_cmp, prefix_bag_free); | |
661 | } | |
662 | ||
663 | pb = XCALLOC(MTYPE_RFAPI_PREFIX_BAG, sizeof(struct prefix_bag)); | |
664 | pb->hpfx = pfx_unicast_nexthop; | |
665 | pb->ubi = info; | |
666 | pb->upfx = *prefix; | |
667 | ||
668 | bgp_info_lock(info); /* skiplist refers to it */ | |
669 | skiplist_insert(bgp->rfapi->resolve_nve_nexthop, &pb->hpfx, pb); | |
670 | ||
671 | /* | |
672 | * Iterate over RDs in VPN RIB. For each RD, look up unicast nexthop | |
673 | * (exact match, /32). If an exact match is found, call add_vnc_route. | |
674 | */ | |
675 | ||
676 | for (bnp = bgp_table_top(bgp->rib[afi][SAFI_MPLS_VPN]); bnp; | |
677 | bnp = bgp_route_next(bnp)) { | |
678 | ||
679 | struct bgp_table *table; | |
680 | ||
681 | table = (struct bgp_table *)(bnp->info); | |
682 | ||
683 | if (!table) | |
684 | continue; | |
685 | ||
686 | vnc_import_bgp_add_route_mode_resolve_nve_one_rd( | |
687 | (struct prefix_rd *)&bnp->p, table, afi, bgp, prefix, | |
688 | ecom, &local_pref, med, &pfx_unicast_nexthop); | |
689 | } | |
690 | ||
691 | ||
692 | if (ecom) | |
693 | ecommunity_free(&ecom); | |
694 | ||
695 | vnc_zlog_debug_verbose("%s: done", __func__); | |
65efcfce LB |
696 | } |
697 | ||
698 | ||
d62a17ae | 699 | static void vnc_import_bgp_add_route_mode_plain(struct bgp *bgp, |
700 | struct prefix *prefix, | |
701 | struct bgp_info *info) | |
65efcfce | 702 | { |
d62a17ae | 703 | afi_t afi = family2afi(prefix->family); |
704 | struct peer *peer = info->peer; | |
705 | struct attr *attr = info->attr; | |
706 | struct attr hattr; | |
707 | struct rfapi_cfg *hc = NULL; | |
708 | struct attr *iattr = NULL; | |
709 | ||
710 | struct rfapi_ip_addr vnaddr; | |
711 | struct prefix vn_pfx_space; | |
712 | struct prefix *vn_pfx = NULL; | |
713 | int ahr_flags = 0; | |
714 | struct ecommunity *ecom = NULL; | |
715 | struct prefix_rd prd; | |
716 | struct route_map *rmap = NULL; | |
717 | uint32_t local_pref; | |
718 | uint32_t *med = NULL; | |
719 | ||
720 | { | |
721 | char buf[BUFSIZ]; | |
722 | ||
723 | buf[0] = 0; | |
724 | prefix2str(prefix, buf, BUFSIZ); | |
725 | buf[BUFSIZ - 1] = 0; | |
726 | vnc_zlog_debug_verbose("%s(prefix=%s) entry", __func__, buf); | |
727 | } | |
728 | ||
729 | if (!afi) { | |
730 | zlog_err("%s: can't get afi of prefix", __func__); | |
731 | return; | |
732 | } | |
733 | ||
734 | if (!(hc = bgp->rfapi_cfg)) { | |
735 | vnc_zlog_debug_verbose("%s: bgp->rfapi_cfg is NULL, skipping", | |
736 | __func__); | |
737 | return; | |
738 | } | |
739 | ||
740 | /* check vnc redist flag for bgp direct routes */ | |
741 | if (!bgp->rfapi_cfg->redist[afi][ZEBRA_ROUTE_BGP_DIRECT]) { | |
742 | vnc_zlog_debug_verbose( | |
743 | "%s: bgp->rfapi_cfg->redist[afi=%d][type=ZEBRA_ROUTE_BGP_DIRECT] is 0, skipping", | |
744 | __func__, afi); | |
745 | return; | |
746 | } | |
747 | ||
748 | /* | |
749 | * mode "plain" specific code | |
750 | */ | |
751 | { | |
752 | vnc_zlog_debug_verbose("%s: NOT using redist RFG", __func__); | |
753 | ||
754 | /* | |
755 | * prefix list check | |
756 | */ | |
757 | if (hc->plist_redist[ZEBRA_ROUTE_BGP_DIRECT][afi]) { | |
758 | vnc_zlog_debug_verbose( | |
759 | "%s: HC prefix list is set, checking", | |
760 | __func__); | |
761 | if (prefix_list_apply( | |
762 | hc->plist_redist[ZEBRA_ROUTE_BGP_DIRECT] | |
763 | [afi], | |
764 | prefix) | |
765 | == PREFIX_DENY) { | |
766 | vnc_zlog_debug_verbose( | |
767 | "%s: prefix list returns DENY, blocking route", | |
768 | __func__); | |
769 | return; | |
770 | } | |
771 | vnc_zlog_debug_verbose( | |
772 | "%s: prefix list returns PASS, allowing route", | |
773 | __func__); | |
774 | } | |
775 | ||
776 | /* apply routemap, if any, later */ | |
777 | rmap = hc->routemap_redist[ZEBRA_ROUTE_BGP_DIRECT]; | |
778 | ||
779 | /* | |
780 | * Incoming prefix is unicast. If v6, it is in multiprotocol | |
781 | * area, | |
782 | * but if v4 it is in attr->nexthop | |
783 | */ | |
784 | rfapiUnicastNexthop2Prefix(afi, attr, &vn_pfx_space); | |
785 | vn_pfx = &vn_pfx_space; | |
786 | ||
787 | /* UN address */ | |
788 | ahr_flags |= RFAPI_AHR_NO_TUNNEL_SUBTLV; | |
789 | } | |
790 | ||
791 | if (VNC_DEBUG(IMPORT_BGP_ADD_ROUTE)) { | |
792 | char buf[BUFSIZ]; | |
793 | ||
794 | buf[0] = 0; | |
795 | prefix2str(vn_pfx, buf, BUFSIZ); | |
796 | buf[BUFSIZ - 1] = 0; | |
797 | vnc_zlog_debug_any("%s vn_pfx=%s", __func__, buf); | |
798 | } | |
799 | ||
800 | /* | |
801 | * Compute VN address | |
802 | */ | |
803 | if (rfapiQprefix2Raddr(vn_pfx, &vnaddr)) { | |
804 | vnc_zlog_debug_verbose("%s: redist VN invalid, skipping", | |
805 | __func__); | |
806 | return; | |
807 | } | |
808 | ||
809 | /* | |
810 | * route map handling | |
811 | * This code is here because it allocates an interned attr which | |
812 | * must be freed before we return. It's easier to put it after | |
813 | * all of the possible returns above. | |
814 | */ | |
815 | memset(&hattr, 0, sizeof(struct attr)); | |
816 | bgp_attr_dup(&hattr, attr); /* hattr becomes a ghost attr */ | |
817 | ||
818 | if (rmap) { | |
819 | struct bgp_info info; | |
820 | route_map_result_t ret; | |
821 | ||
822 | memset(&info, 0, sizeof(info)); | |
823 | info.peer = peer; | |
824 | info.attr = &hattr; | |
825 | ret = route_map_apply(rmap, prefix, RMAP_BGP, &info); | |
826 | if (ret == RMAP_DENYMATCH) { | |
827 | bgp_attr_flush(&hattr); | |
828 | vnc_zlog_debug_verbose( | |
829 | "%s: route map \"%s\" says DENY, returning", | |
830 | __func__, rmap->name); | |
831 | return; | |
832 | } | |
833 | } | |
834 | ||
835 | iattr = bgp_attr_intern(&hattr); | |
836 | bgp_attr_flush(&hattr); | |
837 | ||
838 | /* Now iattr is an allocated interned attr */ | |
839 | ||
840 | /* | |
841 | * Mode "plain" specific code | |
842 | * | |
843 | * Sets RD in dummy HD | |
844 | * Allocates ecom | |
845 | */ | |
846 | { | |
847 | if (vnaddr.addr_family != AF_INET) { | |
848 | vnc_zlog_debug_verbose( | |
849 | "%s: can't auto-assign RD, VN AF (%d) is not IPv4, skipping", | |
850 | __func__, vnaddr.addr_family); | |
851 | if (iattr) { | |
852 | bgp_attr_unintern(&iattr); | |
853 | } | |
854 | return; | |
855 | } | |
856 | memset(&prd, 0, sizeof(prd)); | |
857 | rfapi_set_autord_from_vn(&prd, &vnaddr); | |
858 | ||
859 | if (iattr && iattr->ecommunity) | |
860 | ecom = ecommunity_dup(iattr->ecommunity); | |
861 | } | |
862 | ||
863 | local_pref = calc_local_pref(iattr, peer); | |
864 | ||
865 | if (iattr && (iattr->flag & ATTR_FLAG_BIT(BGP_ATTR_MULTI_EXIT_DISC))) { | |
866 | med = &iattr->med; | |
867 | } | |
868 | ||
869 | if (VNC_DEBUG(IMPORT_BGP_ADD_ROUTE)) { | |
870 | char buf[BUFSIZ]; | |
871 | ||
872 | buf[0] = 0; | |
873 | rfapiRfapiIpAddr2Str(&vnaddr, buf, BUFSIZ); | |
874 | buf[BUFSIZ - 1] = 0; | |
875 | vnc_zlog_debug_any("%s: setting vnaddr to %s", __func__, buf); | |
876 | } | |
877 | ||
878 | vncHDBgpDirect.peer = peer; | |
879 | add_vnc_route(&vncHDBgpDirect, bgp, SAFI_MPLS_VPN, prefix, &prd, | |
880 | &vnaddr, &local_pref, &(bgp->rfapi_cfg->redist_lifetime), | |
881 | NULL, /* RFP options */ | |
882 | NULL, NULL, ecom, med, /* med */ | |
883 | NULL, /* label: default */ | |
884 | ZEBRA_ROUTE_BGP_DIRECT, BGP_ROUTE_REDISTRIBUTE, | |
885 | ahr_flags); | |
886 | vncHDBgpDirect.peer = NULL; | |
887 | ||
888 | if (ecom) | |
889 | ecommunity_free(&ecom); | |
65efcfce LB |
890 | } |
891 | ||
892 | static void | |
d62a17ae | 893 | vnc_import_bgp_add_route_mode_nvegroup(struct bgp *bgp, struct prefix *prefix, |
894 | struct bgp_info *info, | |
895 | struct rfapi_nve_group_cfg *rfg) | |
65efcfce | 896 | { |
d62a17ae | 897 | afi_t afi = family2afi(prefix->family); |
898 | struct peer *peer = info->peer; | |
899 | struct attr *attr = info->attr; | |
900 | struct attr hattr; | |
901 | struct rfapi_cfg *hc = NULL; | |
902 | struct attr *iattr = NULL; | |
903 | ||
904 | struct rfapi_ip_addr vnaddr; | |
905 | struct prefix *vn_pfx = NULL; | |
906 | int ahr_flags = 0; | |
907 | struct ecommunity *ecom = NULL; | |
908 | struct prefix_rd prd; | |
909 | struct route_map *rmap = NULL; | |
910 | uint32_t local_pref; | |
911 | ||
912 | { | |
913 | char buf[BUFSIZ]; | |
914 | ||
915 | buf[0] = 0; | |
916 | prefix2str(prefix, buf, BUFSIZ); | |
917 | buf[BUFSIZ - 1] = 0; | |
918 | vnc_zlog_debug_verbose("%s(prefix=%s) entry", __func__, buf); | |
919 | } | |
920 | ||
921 | assert(rfg); | |
922 | ||
923 | if (!afi) { | |
924 | zlog_err("%s: can't get afi of prefix", __func__); | |
925 | return; | |
926 | } | |
927 | ||
928 | if (!(hc = bgp->rfapi_cfg)) { | |
929 | vnc_zlog_debug_verbose("%s: bgp->rfapi_cfg is NULL, skipping", | |
930 | __func__); | |
931 | return; | |
932 | } | |
933 | ||
934 | /* check vnc redist flag for bgp direct routes */ | |
935 | if (!bgp->rfapi_cfg->redist[afi][ZEBRA_ROUTE_BGP_DIRECT]) { | |
936 | vnc_zlog_debug_verbose( | |
937 | "%s: bgp->rfapi_cfg->redist[afi=%d][type=ZEBRA_ROUTE_BGP_DIRECT] is 0, skipping", | |
938 | __func__, afi); | |
939 | return; | |
940 | } | |
941 | ||
942 | ||
943 | /* | |
944 | * RFG-specific code | |
945 | */ | |
946 | { | |
947 | ||
948 | struct rfapi_ip_prefix pfx_un; | |
949 | ||
950 | vnc_zlog_debug_verbose("%s: using redist RFG", __func__); | |
951 | ||
952 | /* | |
953 | * RFG prefix list check | |
954 | */ | |
955 | if (rfg->plist_redist[ZEBRA_ROUTE_BGP_DIRECT][afi]) { | |
956 | vnc_zlog_debug_verbose( | |
957 | "%s: RFG prefix list is set, checking", | |
958 | __func__); | |
959 | if (prefix_list_apply( | |
960 | rfg->plist_redist[ZEBRA_ROUTE_BGP_DIRECT] | |
961 | [afi], | |
962 | prefix) | |
963 | == PREFIX_DENY) { | |
964 | vnc_zlog_debug_verbose( | |
965 | "%s: prefix list returns DENY, blocking route", | |
966 | __func__); | |
967 | return; | |
968 | } | |
969 | vnc_zlog_debug_verbose( | |
970 | "%s: prefix list returns PASS, allowing route", | |
971 | __func__); | |
972 | } | |
973 | ||
974 | /* apply routemap, if any, later */ | |
975 | rmap = rfg->routemap_redist[ZEBRA_ROUTE_BGP_DIRECT]; | |
976 | ||
977 | /* | |
978 | * export nve group's VN addr prefix must be a /32 which | |
979 | * will yield the VN addr to use | |
980 | */ | |
981 | vn_pfx = &rfg->vn_prefix; | |
982 | ||
983 | /* | |
984 | * UN Address | |
985 | */ | |
986 | if (!is_host_prefix(&rfg->un_prefix)) { | |
987 | /* NB prefixlen==0 means it has not been configured */ | |
988 | vnc_zlog_debug_verbose( | |
989 | "%s: redist RFG UN pfx not host pfx (plen=%d), skipping", | |
990 | __func__, rfg->un_prefix.prefixlen); | |
991 | return; | |
992 | } | |
993 | ||
994 | rfapiQprefix2Rprefix(&rfg->un_prefix, &pfx_un); | |
995 | ||
996 | vncHDBgpDirect.un_addr = pfx_un.prefix; | |
997 | } | |
998 | ||
999 | if (VNC_DEBUG(IMPORT_BGP_ADD_ROUTE)) { | |
1000 | char buf[BUFSIZ]; | |
1001 | ||
1002 | buf[0] = 0; | |
1003 | prefix2str(vn_pfx, buf, BUFSIZ); | |
1004 | buf[BUFSIZ - 1] = 0; | |
1005 | vnc_zlog_debug_any("%s vn_pfx=%s", __func__, buf); | |
1006 | } | |
1007 | ||
1008 | /* | |
1009 | * Compute VN address | |
1010 | */ | |
1011 | if (rfapiQprefix2Raddr(vn_pfx, &vnaddr)) { | |
1012 | vnc_zlog_debug_verbose("%s: redist VN invalid, skipping", | |
1013 | __func__); | |
1014 | return; | |
1015 | } | |
1016 | ||
1017 | /* | |
1018 | * route map handling | |
1019 | * This code is here because it allocates an interned attr which | |
1020 | * must be freed before we return. It's easier to put it after | |
1021 | * all of the possible returns above. | |
1022 | */ | |
1023 | memset(&hattr, 0, sizeof(struct attr)); | |
1024 | bgp_attr_dup(&hattr, attr); /* hattr becomes a ghost attr */ | |
1025 | ||
1026 | if (rmap) { | |
1027 | struct bgp_info info; | |
1028 | route_map_result_t ret; | |
1029 | ||
1030 | memset(&info, 0, sizeof(info)); | |
1031 | info.peer = peer; | |
1032 | info.attr = &hattr; | |
1033 | ret = route_map_apply(rmap, prefix, RMAP_BGP, &info); | |
1034 | if (ret == RMAP_DENYMATCH) { | |
1035 | bgp_attr_flush(&hattr); | |
1036 | vnc_zlog_debug_verbose( | |
1037 | "%s: route map \"%s\" says DENY, returning", | |
1038 | __func__, rmap->name); | |
1039 | return; | |
1040 | } | |
1041 | } | |
1042 | ||
1043 | iattr = bgp_attr_intern(&hattr); | |
1044 | bgp_attr_flush(&hattr); | |
1045 | ||
1046 | /* Now iattr is an allocated interned attr */ | |
1047 | ||
1048 | /* | |
1049 | * RFG-specific code | |
1050 | * | |
1051 | * Sets RD in dummy HD | |
1052 | * Allocates ecom | |
1053 | */ | |
1054 | { | |
1055 | ||
1056 | memset(&prd, 0, sizeof(prd)); | |
1057 | prd = rfg->rd; | |
1058 | prd.family = AF_UNSPEC; | |
1059 | prd.prefixlen = 64; | |
1060 | ||
1061 | if (rfg->rd.family == AF_UNIX) { | |
1062 | rfapi_set_autord_from_vn(&prd, &vnaddr); | |
1063 | } | |
1064 | ||
1065 | if (rfg->rt_export_list) | |
1066 | ecom = ecommunity_dup( | |
1067 | bgp->rfapi_cfg->rfg_redist->rt_export_list); | |
1068 | else | |
1069 | ecom = ecommunity_new(); | |
1070 | ||
1071 | if (iattr && iattr->ecommunity) | |
1072 | ecom = ecommunity_merge(ecom, iattr->ecommunity); | |
1073 | } | |
1074 | ||
1075 | local_pref = calc_local_pref(iattr, peer); | |
1076 | ||
1077 | if (VNC_DEBUG(IMPORT_BGP_ADD_ROUTE)) { | |
1078 | char buf[BUFSIZ]; | |
1079 | ||
1080 | buf[0] = 0; | |
1081 | rfapiRfapiIpAddr2Str(&vnaddr, buf, BUFSIZ); | |
1082 | buf[BUFSIZ - 1] = 0; | |
1083 | vnc_zlog_debug_any("%s: setting vnaddr to %s", __func__, buf); | |
1084 | } | |
1085 | ||
1086 | vncHDBgpDirect.peer = peer; | |
1087 | add_vnc_route(&vncHDBgpDirect, bgp, SAFI_MPLS_VPN, prefix, &prd, | |
1088 | &vnaddr, &local_pref, &(bgp->rfapi_cfg->redist_lifetime), | |
1089 | NULL, /* RFP options */ | |
1090 | NULL, NULL, ecom, NULL, /* med */ | |
1091 | NULL, /* label: default */ | |
1092 | ZEBRA_ROUTE_BGP_DIRECT, BGP_ROUTE_REDISTRIBUTE, | |
1093 | ahr_flags); | |
1094 | vncHDBgpDirect.peer = NULL; | |
1095 | ||
1096 | if (ecom) | |
1097 | ecommunity_free(&ecom); | |
65efcfce LB |
1098 | } |
1099 | ||
d62a17ae | 1100 | static void vnc_import_bgp_del_route_mode_plain(struct bgp *bgp, |
1101 | struct prefix *prefix, | |
1102 | struct bgp_info *info) | |
65efcfce | 1103 | { |
d62a17ae | 1104 | struct prefix_rd prd; |
1105 | afi_t afi = family2afi(prefix->family); | |
1106 | struct prefix *vn_pfx = NULL; | |
1107 | struct rfapi_ip_addr vnaddr; | |
1108 | struct prefix vn_pfx_space; | |
1109 | ||
1110 | ||
1111 | assert(afi); | |
1112 | ||
1113 | /* | |
1114 | * Compute VN address | |
1115 | */ | |
1116 | ||
1117 | if (info && info->attr) { | |
1118 | rfapiUnicastNexthop2Prefix(afi, info->attr, &vn_pfx_space); | |
1119 | } else { | |
1120 | vnc_zlog_debug_verbose("%s: no attr, can't delete route", | |
1121 | __func__); | |
1122 | return; | |
1123 | } | |
1124 | vn_pfx = &vn_pfx_space; | |
1125 | ||
1126 | vnaddr.addr_family = vn_pfx->family; | |
1127 | switch (vn_pfx->family) { | |
1128 | case AF_INET: | |
1129 | if (vn_pfx->prefixlen != 32) { | |
1130 | vnc_zlog_debug_verbose( | |
1131 | "%s: redist VN plen (%d) != 32, skipping", | |
1132 | __func__, vn_pfx->prefixlen); | |
1133 | return; | |
1134 | } | |
1135 | vnaddr.addr.v4 = vn_pfx->u.prefix4; | |
1136 | break; | |
1137 | ||
1138 | case AF_INET6: | |
1139 | if (vn_pfx->prefixlen != 128) { | |
1140 | vnc_zlog_debug_verbose( | |
1141 | "%s: redist VN plen (%d) != 128, skipping", | |
1142 | __func__, vn_pfx->prefixlen); | |
1143 | return; | |
1144 | } | |
1145 | vnaddr.addr.v6 = vn_pfx->u.prefix6; | |
1146 | break; | |
1147 | ||
1148 | default: | |
1149 | vnc_zlog_debug_verbose( | |
1150 | "%s: no redist RFG VN host pfx configured, skipping", | |
1151 | __func__); | |
1152 | return; | |
1153 | } | |
1154 | ||
1155 | ||
1156 | memset(&prd, 0, sizeof(prd)); | |
1157 | if (rfapi_set_autord_from_vn(&prd, &vnaddr)) { | |
1158 | vnc_zlog_debug_verbose("%s: can't auto-assign RD, skipping", | |
1159 | __func__); | |
1160 | return; | |
1161 | } | |
1162 | ||
1163 | vncHDBgpDirect.peer = info->peer; | |
1164 | vnc_zlog_debug_verbose("%s: setting peer to %p", __func__, | |
1165 | vncHDBgpDirect.peer); | |
1166 | del_vnc_route(&vncHDBgpDirect, info->peer, bgp, SAFI_MPLS_VPN, prefix, | |
1167 | &prd, ZEBRA_ROUTE_BGP_DIRECT, BGP_ROUTE_REDISTRIBUTE, | |
1168 | NULL, 1); | |
1169 | ||
1170 | vncHDBgpDirect.peer = NULL; | |
65efcfce LB |
1171 | } |
1172 | ||
d62a17ae | 1173 | static void vnc_import_bgp_del_route_mode_nvegroup(struct bgp *bgp, |
1174 | struct prefix *prefix, | |
1175 | struct bgp_info *info) | |
65efcfce | 1176 | { |
d62a17ae | 1177 | struct prefix_rd prd; |
1178 | afi_t afi = family2afi(prefix->family); | |
1179 | struct rfapi_nve_group_cfg *rfg = NULL; | |
1180 | struct prefix *vn_pfx = NULL; | |
1181 | struct rfapi_ip_addr vnaddr; | |
1182 | ||
1183 | ||
1184 | assert(afi); | |
1185 | ||
1186 | assert((rfg = bgp->rfapi_cfg->rfg_redist)); | |
1187 | ||
1188 | /* | |
1189 | * Compute VN address | |
1190 | */ | |
1191 | ||
1192 | /* | |
1193 | * export nve group's VN addr prefix must be a /32 which | |
1194 | * will yield the VN addr to use | |
1195 | */ | |
1196 | vn_pfx = &rfg->vn_prefix; | |
1197 | ||
1198 | ||
1199 | vnaddr.addr_family = vn_pfx->family; | |
1200 | switch (vn_pfx->family) { | |
1201 | case AF_INET: | |
1202 | if (vn_pfx->prefixlen != 32) { | |
1203 | vnc_zlog_debug_verbose( | |
1204 | "%s: redist VN plen (%d) != 32, skipping", | |
1205 | __func__, vn_pfx->prefixlen); | |
1206 | return; | |
1207 | } | |
1208 | vnaddr.addr.v4 = vn_pfx->u.prefix4; | |
1209 | break; | |
1210 | ||
1211 | case AF_INET6: | |
1212 | if (vn_pfx->prefixlen != 128) { | |
1213 | vnc_zlog_debug_verbose( | |
1214 | "%s: redist VN plen (%d) != 128, skipping", | |
1215 | __func__, vn_pfx->prefixlen); | |
1216 | return; | |
1217 | } | |
1218 | vnaddr.addr.v6 = vn_pfx->u.prefix6; | |
1219 | break; | |
1220 | ||
1221 | default: | |
1222 | vnc_zlog_debug_verbose( | |
1223 | "%s: no redist RFG VN host pfx configured, skipping", | |
1224 | __func__); | |
1225 | return; | |
1226 | } | |
1227 | ||
1228 | memset(&prd, 0, sizeof(prd)); | |
1229 | prd = rfg->rd; | |
1230 | prd.family = AF_UNSPEC; | |
1231 | prd.prefixlen = 64; | |
1232 | ||
1233 | if (rfg->rd.family == AF_UNIX) { | |
1234 | /* means "auto" with VN addr */ | |
1235 | if (rfapi_set_autord_from_vn(&prd, &vnaddr)) { | |
1236 | vnc_zlog_debug_verbose( | |
1237 | "%s: can't auto-assign RD, skipping", __func__); | |
1238 | return; | |
1239 | } | |
1240 | } | |
1241 | ||
1242 | ||
1243 | vncHDBgpDirect.peer = info->peer; | |
1244 | vnc_zlog_debug_verbose("%s: setting peer to %p", __func__, | |
1245 | vncHDBgpDirect.peer); | |
1246 | del_vnc_route(&vncHDBgpDirect, info->peer, bgp, SAFI_MPLS_VPN, prefix, | |
1247 | &prd, ZEBRA_ROUTE_BGP_DIRECT, BGP_ROUTE_REDISTRIBUTE, | |
1248 | NULL, 1); | |
1249 | ||
1250 | vncHDBgpDirect.peer = NULL; | |
65efcfce LB |
1251 | } |
1252 | ||
d62a17ae | 1253 | static void vnc_import_bgp_del_route_mode_resolve_nve_one_bi( |
1254 | struct bgp *bgp, afi_t afi, struct bgp_info *bi, /* VPN bi */ | |
1255 | struct prefix_rd *prd, /* RD */ | |
1256 | struct prefix *prefix) /* unicast route prefix */ | |
65efcfce | 1257 | { |
d62a17ae | 1258 | struct prefix un; |
1259 | ||
1260 | if (bi->type != ZEBRA_ROUTE_BGP && bi->type != ZEBRA_ROUTE_BGP_DIRECT) { | |
65efcfce | 1261 | |
d62a17ae | 1262 | return; |
1263 | } | |
1264 | if (bi->sub_type != BGP_ROUTE_NORMAL && bi->sub_type != BGP_ROUTE_STATIC | |
1265 | && bi->sub_type != BGP_ROUTE_RFP) { | |
1266 | ||
1267 | return; | |
1268 | } | |
1269 | if (CHECK_FLAG(bi->flags, BGP_INFO_REMOVED)) | |
1270 | return; | |
1271 | ||
1272 | vncHDResolveNve.peer = bi->peer; | |
1273 | if (!rfapiGetVncTunnelUnAddr(bi->attr, &un)) { | |
1274 | if (rfapiQprefix2Raddr(&un, &vncHDResolveNve.un_addr)) | |
1275 | return; | |
1276 | } else { | |
1277 | memset(&vncHDResolveNve.un_addr, 0, | |
1278 | sizeof(vncHDResolveNve.un_addr)); | |
1279 | } | |
1280 | ||
1281 | del_vnc_route(&vncHDResolveNve, vncHDResolveNve.peer, bgp, | |
1282 | SAFI_MPLS_VPN, prefix, /* unicast route prefix */ | |
1283 | prd, ZEBRA_ROUTE_BGP_DIRECT, BGP_ROUTE_REDISTRIBUTE, NULL, | |
1284 | 0); /* flags */ | |
65efcfce LB |
1285 | } |
1286 | ||
d62a17ae | 1287 | static void vnc_import_bgp_del_route_mode_resolve_nve_one_rd( |
1288 | struct prefix_rd *prd, | |
1289 | struct bgp_table *table_rd, /* per-rd VPN route table */ | |
1290 | afi_t afi, struct bgp *bgp, struct prefix *prefix, /* unicast prefix */ | |
1291 | struct prefix *ubi_nexthop) /* unicast bi's nexthop */ | |
65efcfce | 1292 | { |
d62a17ae | 1293 | struct bgp_node *bn; |
1294 | struct bgp_info *bi; | |
65efcfce | 1295 | |
d62a17ae | 1296 | if (!table_rd) |
1297 | return; | |
65efcfce | 1298 | |
d62a17ae | 1299 | { |
1300 | char str_nh[BUFSIZ]; | |
65efcfce | 1301 | |
d62a17ae | 1302 | prefix2str(ubi_nexthop, str_nh, BUFSIZ); |
1303 | str_nh[BUFSIZ - 1] = 0; | |
65efcfce | 1304 | |
d62a17ae | 1305 | vnc_zlog_debug_verbose("%s: ubi_nexthop=%s", __func__, str_nh); |
1306 | } | |
65efcfce LB |
1307 | |
1308 | ||
d62a17ae | 1309 | /* exact match */ |
1310 | bn = bgp_node_lookup(table_rd, ubi_nexthop); | |
1311 | if (!bn) { | |
1312 | vnc_zlog_debug_verbose( | |
1313 | "%s: no match in RD's table for ubi_nexthop", __func__); | |
1314 | return; | |
1315 | } | |
65efcfce | 1316 | |
d62a17ae | 1317 | /* Iterate over bgp_info items at this node */ |
1318 | for (bi = bn->info; bi; bi = bi->next) { | |
65efcfce | 1319 | |
d62a17ae | 1320 | vnc_import_bgp_del_route_mode_resolve_nve_one_bi( |
1321 | bgp, afi, bi, /* VPN bi */ | |
1322 | prd, /* VPN RD */ | |
1323 | prefix); /* unicast route prefix */ | |
1324 | } | |
65efcfce | 1325 | |
d62a17ae | 1326 | bgp_unlock_node(bn); |
65efcfce LB |
1327 | } |
1328 | ||
d62a17ae | 1329 | static void vnc_import_bgp_del_route_mode_resolve_nve(struct bgp *bgp, |
1330 | afi_t afi, | |
1331 | struct prefix *prefix, | |
1332 | struct bgp_info *info) | |
65efcfce | 1333 | { |
d62a17ae | 1334 | struct ecommunity *ecom = NULL; |
1335 | struct prefix pfx_unicast_nexthop = {0}; /* happy valgrind */ | |
1336 | ||
1337 | // struct listnode *hnode; | |
1338 | // struct rfapi_descriptor *rfd; | |
1339 | struct prefix_bag *pb; | |
1340 | void *cursor; | |
1341 | struct skiplist *sl = bgp->rfapi->resolve_nve_nexthop; | |
1342 | int rc; | |
1343 | struct bgp_node *bnp; /* prd table node */ | |
1344 | ||
1345 | if (!sl) { | |
1346 | vnc_zlog_debug_verbose("%s: no RHN entries, skipping", | |
1347 | __func__); | |
1348 | return; | |
1349 | } | |
65efcfce | 1350 | |
d62a17ae | 1351 | if (info->type != ZEBRA_ROUTE_BGP) { |
1352 | vnc_zlog_debug_verbose( | |
1353 | "%s: unicast type %d=\"%s\" is not %d=%s, skipping", | |
1354 | __func__, info->type, zebra_route_string(info->type), | |
1355 | ZEBRA_ROUTE_BGP, "ZEBRA_ROUTE_BGP"); | |
1356 | return; | |
1357 | } | |
65efcfce | 1358 | |
d62a17ae | 1359 | if (process_unicast_route(bgp, afi, prefix, info, &ecom, |
1360 | &pfx_unicast_nexthop)) { | |
1361 | ||
1362 | vnc_zlog_debug_verbose( | |
1363 | "%s: process_unicast_route error, skipping", __func__); | |
1364 | return; | |
1365 | } | |
1366 | ||
1367 | rc = skiplist_first_value(sl, &pfx_unicast_nexthop, (void *)&pb, | |
1368 | &cursor); | |
1369 | while (!rc) { | |
1370 | if (pb->ubi == info) { | |
1371 | skiplist_delete(sl, &pfx_unicast_nexthop, pb); | |
1372 | bgp_info_unlock(info); | |
1373 | break; | |
1374 | } | |
1375 | rc = skiplist_next_value(sl, &pfx_unicast_nexthop, (void *)&pb, | |
1376 | &cursor); | |
1377 | } | |
1378 | ||
1379 | /* | |
1380 | * Iterate over RDs in VPN RIB. For each RD, look up unicast nexthop | |
1381 | * (exact match, /32). If an exact match is found, call add_vnc_route. | |
1382 | */ | |
1383 | ||
1384 | for (bnp = bgp_table_top(bgp->rib[afi][SAFI_MPLS_VPN]); bnp; | |
1385 | bnp = bgp_route_next(bnp)) { | |
1386 | ||
1387 | struct bgp_table *table; | |
1388 | ||
1389 | table = (struct bgp_table *)(bnp->info); | |
1390 | ||
1391 | if (!table) | |
1392 | continue; | |
1393 | ||
1394 | vnc_import_bgp_del_route_mode_resolve_nve_one_rd( | |
1395 | (struct prefix_rd *)&bnp->p, table, afi, bgp, prefix, | |
1396 | &pfx_unicast_nexthop); /* TBD how is this set? */ | |
1397 | } | |
1398 | ||
1399 | if (ecom) | |
1400 | ecommunity_free(&ecom); | |
1401 | } | |
65efcfce LB |
1402 | |
1403 | ||
1404 | /*********************************************************************** | |
1405 | * Add/Delete CE->NVE routes | |
1406 | ***********************************************************************/ | |
1407 | ||
1408 | /* | |
1409 | * Should be called whan a bi is added to VPN RIB. This function | |
1410 | * will check if it is a host route and return immediately if not. | |
1411 | */ | |
d62a17ae | 1412 | void vnc_import_bgp_add_vnc_host_route_mode_resolve_nve( |
1413 | struct bgp *bgp, struct prefix_rd *prd, /* RD */ | |
1414 | struct bgp_table *table_rd, /* per-rd VPN route table */ | |
1415 | struct prefix *prefix, /* VPN prefix */ | |
1416 | struct bgp_info *bi) /* new VPN host route */ | |
65efcfce | 1417 | { |
d62a17ae | 1418 | afi_t afi = family2afi(prefix->family); |
1419 | struct skiplist *sl = NULL; | |
1420 | int rc; | |
1421 | struct prefix_bag *pb; | |
1422 | void *cursor; | |
1423 | struct rfapi_cfg *hc = NULL; | |
1424 | ||
1425 | vnc_zlog_debug_verbose("%s: entry", __func__); | |
1426 | ||
1427 | if (afi != AFI_IP && afi != AFI_IP6) { | |
1428 | vnc_zlog_debug_verbose("%s: bad afi %d, skipping", __func__, | |
1429 | afi); | |
1430 | return; | |
1431 | } | |
1432 | ||
1433 | if (!(hc = bgp->rfapi_cfg)) { | |
1434 | vnc_zlog_debug_verbose("%s: bgp->rfapi_cfg is NULL, skipping", | |
1435 | __func__); | |
1436 | return; | |
1437 | } | |
65efcfce | 1438 | |
d62a17ae | 1439 | /* check vnc redist flag for bgp direct routes */ |
1440 | if (!hc->redist[afi][ZEBRA_ROUTE_BGP_DIRECT]) { | |
1441 | vnc_zlog_debug_verbose( | |
1442 | "%s: bgp->rfapi_cfg->redist[afi=%d][type=ZEBRA_ROUTE_BGP_DIRECT] is 0, skipping", | |
1443 | __func__, afi); | |
1444 | return; | |
1445 | } | |
65efcfce | 1446 | |
d62a17ae | 1447 | if (hc->redist_mode != VNC_REDIST_MODE_RESOLVE_NVE) { |
1448 | vnc_zlog_debug_verbose("%s: not in resolve-nve mode, skipping", | |
1449 | __func__); | |
1450 | return; | |
65efcfce LB |
1451 | } |
1452 | ||
d62a17ae | 1453 | if (bgp && bgp->rfapi) |
1454 | sl = bgp->rfapi->resolve_nve_nexthop; | |
1455 | ||
1456 | if (!sl) { | |
1457 | vnc_zlog_debug_verbose( | |
1458 | "%s: no resolve_nve_nexthop skiplist, skipping", | |
1459 | __func__); | |
1460 | return; | |
1461 | } | |
1462 | ||
1463 | if (!is_host_prefix(prefix)) { | |
1464 | vnc_zlog_debug_verbose("%s: not host prefix, skipping", | |
1465 | __func__); | |
1466 | return; | |
1467 | } | |
1468 | ||
1469 | rc = skiplist_first_value(sl, prefix, (void *)&pb, &cursor); | |
1470 | while (!rc) { | |
1471 | struct ecommunity *ecom; | |
1472 | struct prefix pfx_unicast_nexthop; | |
1473 | uint32_t *med = NULL; | |
1474 | uint32_t local_pref; | |
1475 | ||
1476 | memset(&pfx_unicast_nexthop, 0, | |
1477 | sizeof(struct prefix)); /* keep valgrind happy */ | |
1478 | ||
1479 | if (VNC_DEBUG(IMPORT_BGP_ADD_ROUTE)) { | |
1480 | char hbuf[BUFSIZ]; | |
1481 | char ubuf[BUFSIZ]; | |
65efcfce | 1482 | |
d62a17ae | 1483 | prefix2str(&pb->hpfx, hbuf, BUFSIZ); |
1484 | prefix2str(&pb->upfx, ubuf, BUFSIZ); | |
65efcfce | 1485 | |
d62a17ae | 1486 | vnc_zlog_debug_any( |
1487 | "%s: examining RHN Entry (q=%p): upfx=%s, hpfx=%s, ubi=%p", | |
1488 | __func__, cursor, ubuf, hbuf, pb->ubi); | |
1489 | } | |
65efcfce | 1490 | |
d62a17ae | 1491 | if (process_unicast_route(bgp, afi, &pb->upfx, pb->ubi, &ecom, |
1492 | &pfx_unicast_nexthop)) { | |
65efcfce | 1493 | |
d62a17ae | 1494 | vnc_zlog_debug_verbose( |
1495 | "%s: process_unicast_route error, skipping", | |
1496 | __func__); | |
1497 | continue; | |
1498 | } | |
1499 | local_pref = calc_local_pref(pb->ubi->attr, pb->ubi->peer); | |
65efcfce | 1500 | |
d62a17ae | 1501 | if (pb->ubi->attr |
1502 | && (pb->ubi->attr->flag | |
1503 | & ATTR_FLAG_BIT(BGP_ATTR_MULTI_EXIT_DISC))) { | |
65efcfce | 1504 | |
d62a17ae | 1505 | med = &pb->ubi->attr->med; |
1506 | } | |
65efcfce | 1507 | |
d62a17ae | 1508 | /* |
1509 | * Sanity check | |
1510 | */ | |
1511 | if (vnc_prefix_cmp(&pfx_unicast_nexthop, prefix)) { | |
1512 | char str_unh[BUFSIZ]; | |
1513 | char str_nve_pfx[BUFSIZ]; | |
65efcfce | 1514 | |
d62a17ae | 1515 | prefix2str(&pfx_unicast_nexthop, str_unh, BUFSIZ); |
1516 | str_unh[BUFSIZ - 1] = 0; | |
65efcfce | 1517 | |
d62a17ae | 1518 | prefix2str(prefix, str_nve_pfx, BUFSIZ); |
1519 | str_nve_pfx[BUFSIZ - 1] = 0; | |
1520 | ||
1521 | vnc_zlog_debug_verbose( | |
1522 | "%s: FATAL: resolve_nve_nexthop list item bi nexthop %s != nve pfx %s", | |
1523 | __func__, str_unh, str_nve_pfx); | |
1524 | assert(0); | |
1525 | } | |
1526 | ||
1527 | vnc_import_bgp_add_route_mode_resolve_nve_one_bi( | |
1528 | bgp, afi, bi, /* VPN bi */ | |
1529 | prd, &pb->upfx, /* unicast prefix */ | |
1530 | &local_pref, med, ecom); | |
1531 | ||
1532 | if (ecom) | |
1533 | ecommunity_free(&ecom); | |
65efcfce LB |
1534 | |
1535 | #if DEBUG_RHN_LIST | |
d62a17ae | 1536 | /* debug */ |
1537 | { | |
1538 | char pbuf[BUFSIZ]; | |
65efcfce | 1539 | |
d62a17ae | 1540 | prefix2str(prefix, pbuf, BUFSIZ); |
65efcfce | 1541 | |
d62a17ae | 1542 | vnc_zlog_debug_verbose( |
1543 | "%s: advancing past RHN Entry (q=%p): with prefix %s", | |
1544 | __func__, cursor, pbuf); | |
1545 | print_rhn_list(__func__, NULL); /* debug */ | |
1546 | } | |
65efcfce | 1547 | #endif |
d62a17ae | 1548 | rc = skiplist_next_value(sl, prefix, (void *)&pb, &cursor); |
1549 | } | |
1550 | vnc_zlog_debug_verbose("%s: done", __func__); | |
65efcfce LB |
1551 | } |
1552 | ||
1553 | ||
d62a17ae | 1554 | void vnc_import_bgp_del_vnc_host_route_mode_resolve_nve( |
1555 | struct bgp *bgp, struct prefix_rd *prd, /* RD */ | |
1556 | struct bgp_table *table_rd, /* per-rd VPN route table */ | |
1557 | struct prefix *prefix, /* VPN prefix */ | |
1558 | struct bgp_info *bi) /* old VPN host route */ | |
65efcfce | 1559 | { |
d62a17ae | 1560 | afi_t afi = family2afi(prefix->family); |
1561 | struct skiplist *sl = NULL; | |
1562 | struct prefix_bag *pb; | |
1563 | void *cursor; | |
1564 | struct rfapi_cfg *hc = NULL; | |
1565 | int rc; | |
1566 | ||
1567 | { | |
1568 | char str_pfx[BUFSIZ]; | |
1569 | ||
1570 | prefix2str(prefix, str_pfx, BUFSIZ); | |
1571 | str_pfx[BUFSIZ - 1] = 0; | |
1572 | ||
1573 | vnc_zlog_debug_verbose("%s(bgp=%p, nve prefix=%s)", __func__, | |
1574 | bgp, str_pfx); | |
1575 | } | |
1576 | ||
1577 | if (afi != AFI_IP && afi != AFI_IP6) | |
1578 | return; | |
1579 | ||
1580 | if (!(hc = bgp->rfapi_cfg)) { | |
1581 | vnc_zlog_debug_verbose("%s: bgp->rfapi_cfg is NULL, skipping", | |
1582 | __func__); | |
1583 | return; | |
1584 | } | |
1585 | ||
1586 | /* check vnc redist flag for bgp direct routes */ | |
1587 | if (!hc->redist[afi][ZEBRA_ROUTE_BGP_DIRECT]) { | |
1588 | vnc_zlog_debug_verbose( | |
1589 | "%s: bgp->rfapi_cfg->redist[afi=%d][type=ZEBRA_ROUTE_BGP_DIRECT] is 0, skipping", | |
1590 | __func__, afi); | |
1591 | return; | |
1592 | } | |
1593 | ||
1594 | if (hc->redist_mode != VNC_REDIST_MODE_RESOLVE_NVE) { | |
1595 | vnc_zlog_debug_verbose("%s: not in resolve-nve mode, skipping", | |
1596 | __func__); | |
1597 | return; | |
1598 | } | |
1599 | ||
1600 | if (bgp && bgp->rfapi) | |
1601 | sl = bgp->rfapi->resolve_nve_nexthop; | |
1602 | ||
1603 | if (!sl) { | |
1604 | vnc_zlog_debug_verbose("%s: no RHN entries, skipping", | |
1605 | __func__); | |
1606 | return; | |
1607 | } | |
1608 | ||
1609 | if (!is_host_prefix(prefix)) { | |
1610 | vnc_zlog_debug_verbose("%s: not host route, skip", __func__); | |
1611 | return; | |
1612 | } | |
1613 | ||
1614 | /* | |
1615 | * Find all entries with key == CE in the RHN list | |
1616 | */ | |
1617 | rc = skiplist_first_value(sl, prefix, (void *)&pb, &cursor); | |
1618 | while (!rc) { | |
1619 | ||
1620 | struct ecommunity *ecom; | |
1621 | struct prefix pfx_unicast_nexthop; | |
1622 | ||
1623 | memset(&pfx_unicast_nexthop, 0, | |
1624 | sizeof(struct prefix)); /* keep valgrind happy */ | |
1625 | ||
1626 | if (process_unicast_route(bgp, afi, &pb->upfx, pb->ubi, &ecom, | |
1627 | &pfx_unicast_nexthop)) { | |
1628 | ||
1629 | vnc_zlog_debug_verbose( | |
1630 | "%s: process_unicast_route error, skipping", | |
1631 | __func__); | |
1632 | continue; | |
1633 | } | |
1634 | ||
1635 | /* | |
1636 | * Sanity check | |
1637 | */ | |
1638 | if (vnc_prefix_cmp(&pfx_unicast_nexthop, prefix)) { | |
1639 | char str_unh[BUFSIZ]; | |
1640 | char str_nve_pfx[BUFSIZ]; | |
1641 | ||
1642 | prefix2str(&pfx_unicast_nexthop, str_unh, BUFSIZ); | |
1643 | str_unh[BUFSIZ - 1] = 0; | |
1644 | ||
1645 | prefix2str(prefix, str_nve_pfx, BUFSIZ); | |
1646 | str_nve_pfx[BUFSIZ - 1] = 0; | |
1647 | ||
1648 | vnc_zlog_debug_verbose( | |
1649 | "%s: FATAL: resolve_nve_nexthop list item bi nexthop %s != nve pfx %s", | |
1650 | __func__, str_unh, str_nve_pfx); | |
1651 | assert(0); | |
1652 | } | |
1653 | ||
1654 | vnc_import_bgp_del_route_mode_resolve_nve_one_bi( | |
1655 | bgp, afi, bi, prd, &pb->upfx); | |
1656 | ||
1657 | if (ecom) | |
1658 | ecommunity_free(&ecom); | |
1659 | ||
1660 | rc = skiplist_next_value(sl, prefix, (void *)&pb, &cursor); | |
1661 | } | |
65efcfce LB |
1662 | } |
1663 | ||
1664 | ||
1665 | /*********************************************************************** | |
1666 | * Exterior Routes | |
1667 | ***********************************************************************/ | |
1668 | ||
1669 | #define DEBUG_IS_USABLE_INTERIOR 1 | |
1670 | ||
d62a17ae | 1671 | static int is_usable_interior_route(struct bgp_info *bi_interior) |
65efcfce | 1672 | { |
d62a17ae | 1673 | if (!VALID_INTERIOR_TYPE(bi_interior->type)) { |
65efcfce | 1674 | #if DEBUG_IS_USABLE_INTERIOR |
d62a17ae | 1675 | vnc_zlog_debug_verbose( |
1676 | "%s: NO: type %d is not valid interior type", __func__, | |
1677 | bi_interior->type); | |
65efcfce | 1678 | #endif |
d62a17ae | 1679 | return 0; |
1680 | } | |
1681 | if (!CHECK_FLAG(bi_interior->flags, BGP_INFO_VALID)) { | |
65efcfce | 1682 | #if DEBUG_IS_USABLE_INTERIOR |
d62a17ae | 1683 | vnc_zlog_debug_verbose("%s: NO: BGP_INFO_VALID not set", |
1684 | __func__); | |
65efcfce | 1685 | #endif |
d62a17ae | 1686 | return 0; |
1687 | } | |
1688 | return 1; | |
65efcfce LB |
1689 | } |
1690 | ||
1691 | /* | |
1692 | * There should be only one of these per prefix at a time. | |
1693 | * This should be called as a result of selection operation | |
1694 | * | |
1695 | * NB should be called espacially for bgp instances that are named, | |
1696 | * because the exterior routes will always come from one of those. | |
1697 | * We filter here on the instance name to make sure we get only the | |
1698 | * right routes. | |
1699 | */ | |
d62a17ae | 1700 | static void vnc_import_bgp_exterior_add_route_it( |
1701 | struct bgp *bgp, /* exterior instance, we hope */ | |
1702 | struct prefix *prefix, /* unicast prefix */ | |
1703 | struct bgp_info *info, /* unicast info */ | |
1704 | struct rfapi_import_table *it_only) /* NULL, or limit to this IT */ | |
65efcfce | 1705 | { |
d62a17ae | 1706 | struct rfapi *h; |
1707 | struct rfapi_cfg *hc; | |
1708 | struct prefix pfx_orig_nexthop; | |
1709 | struct rfapi_import_table *it; | |
1710 | struct bgp *bgp_default = bgp_get_default(); | |
1711 | afi_t afi = family2afi(prefix->family); | |
1712 | ||
1713 | if (!bgp_default) | |
1714 | return; | |
1715 | ||
1716 | h = bgp_default->rfapi; | |
1717 | hc = bgp_default->rfapi_cfg; | |
1718 | ||
1719 | vnc_zlog_debug_verbose("%s: entry with it=%p", __func__, it_only); | |
1720 | ||
1721 | if (!h || !hc) { | |
1722 | vnc_zlog_debug_verbose( | |
1723 | "%s: rfapi or rfapi_cfg not instantiated, skipping", | |
1724 | __func__); | |
1725 | return; | |
1726 | } | |
1727 | if (!hc->redist_bgp_exterior_view) { | |
1728 | vnc_zlog_debug_verbose("%s: exterior view not set, skipping", | |
1729 | __func__); | |
1730 | return; | |
1731 | } | |
1732 | if (bgp != hc->redist_bgp_exterior_view) { | |
1733 | vnc_zlog_debug_verbose( | |
1734 | "%s: bgp %p != hc->redist_bgp_exterior_view %p, skipping", | |
1735 | __func__, bgp, hc->redist_bgp_exterior_view); | |
1736 | return; | |
1737 | } | |
1738 | ||
1739 | if (!hc->redist[afi][ZEBRA_ROUTE_BGP_DIRECT_EXT]) { | |
1740 | vnc_zlog_debug_verbose( | |
1741 | "%s: redist of exterior routes not enabled, skipping", | |
1742 | __func__); | |
1743 | return; | |
1744 | } | |
1745 | ||
1746 | if (!info->attr) { | |
1747 | vnc_zlog_debug_verbose("%s: no info, skipping", __func__); | |
1748 | return; | |
1749 | } | |
1750 | ||
1751 | /* | |
1752 | * Extract nexthop from exterior route | |
1753 | * | |
1754 | * Incoming prefix is unicast. If v6, it is in multiprotocol area, | |
1755 | * but if v4 it is in attr->nexthop | |
1756 | */ | |
1757 | rfapiUnicastNexthop2Prefix(afi, info->attr, &pfx_orig_nexthop); | |
1758 | ||
1759 | for (it = h->imports; it; it = it->next) { | |
1760 | struct route_table *table; | |
1761 | struct route_node *rn; | |
1762 | struct route_node *par; | |
1763 | struct bgp_info *bi_interior; | |
1764 | int have_usable_route; | |
1765 | ||
1766 | vnc_zlog_debug_verbose("%s: doing it %p", __func__, it); | |
1767 | ||
1768 | if (it_only && (it_only != it)) { | |
1769 | vnc_zlog_debug_verbose("%s: doesn't match it_only %p", | |
1770 | __func__, it_only); | |
1771 | continue; | |
1772 | } | |
1773 | ||
1774 | table = it->imported_vpn[afi]; | |
1775 | ||
1776 | for (rn = route_node_match(table, &pfx_orig_nexthop), | |
1777 | have_usable_route = 0; | |
1778 | (!have_usable_route) && rn;) { | |
1779 | ||
1780 | vnc_zlog_debug_verbose("%s: it %p trying rn %p", | |
1781 | __func__, it, rn); | |
1782 | ||
1783 | for (bi_interior = rn->info; bi_interior; | |
1784 | bi_interior = bi_interior->next) { | |
1785 | struct prefix_rd *prd; | |
1786 | struct attr new_attr; | |
1787 | u_int32_t label = 0; | |
1788 | ||
1789 | if (!is_usable_interior_route(bi_interior)) | |
1790 | continue; | |
1791 | ||
1792 | vnc_zlog_debug_verbose( | |
1793 | "%s: usable: bi_interior %p", __func__, | |
1794 | bi_interior); | |
1795 | ||
1796 | /* | |
1797 | * have a legitimate route to exterior's nexthop | |
1798 | * via NVE. | |
1799 | * | |
1800 | * Import unicast route to the import table | |
1801 | */ | |
1802 | have_usable_route = 1; | |
1803 | ||
1804 | if (bi_interior->extra) { | |
1805 | prd = &bi_interior->extra->vnc.import | |
1806 | .rd; | |
1807 | label = decode_label( | |
1808 | &bi_interior->extra->label); | |
1809 | } else | |
1810 | prd = NULL; | |
1811 | ||
1812 | /* use local_pref from unicast route */ | |
1813 | memset(&new_attr, 0, sizeof(struct attr)); | |
1814 | bgp_attr_dup(&new_attr, bi_interior->attr); | |
1815 | if (info->attr->flag | |
1816 | & ATTR_FLAG_BIT(BGP_ATTR_LOCAL_PREF)) { | |
1817 | new_attr.local_pref = | |
1818 | info->attr->local_pref; | |
1819 | new_attr.flag |= ATTR_FLAG_BIT( | |
1820 | BGP_ATTR_LOCAL_PREF); | |
1821 | } | |
1822 | ||
1823 | rfapiBgpInfoFilteredImportVPN( | |
1824 | it, FIF_ACTION_UPDATE, | |
1825 | bi_interior->peer, NULL, /* rfd */ | |
1826 | prefix, NULL, afi, prd, &new_attr, | |
1827 | ZEBRA_ROUTE_BGP_DIRECT_EXT, | |
1828 | BGP_ROUTE_REDISTRIBUTE, &label); | |
1829 | } | |
1830 | ||
1831 | if (have_usable_route) { | |
1832 | /* | |
1833 | * Make monitor | |
1834 | * | |
1835 | * TBD factor this out into its own function | |
1836 | */ | |
1837 | struct prefix *pfx_mon = prefix_new(); | |
1838 | if (!RFAPI_MONITOR_EXTERIOR(rn)->source) { | |
1839 | RFAPI_MONITOR_EXTERIOR(rn)->source = | |
1840 | skiplist_new( | |
1841 | 0, NULL, | |
1842 | (void (*)(void *)) | |
1843 | prefix_free); | |
1844 | route_lock_node(rn); /* for skiplist */ | |
1845 | } | |
1846 | route_lock_node(rn); /* for skiplist entry */ | |
1847 | prefix_copy(pfx_mon, prefix); | |
1848 | if (!skiplist_insert( | |
1849 | RFAPI_MONITOR_EXTERIOR(rn)->source, | |
1850 | info, pfx_mon)) { | |
1851 | ||
1852 | bgp_info_lock(info); | |
1853 | } | |
1854 | } | |
1855 | par = rn->parent; | |
1856 | if (par) | |
1857 | route_lock_node(par); | |
1858 | route_unlock_node(rn); | |
1859 | rn = par; | |
1860 | } | |
1861 | if (rn) | |
1862 | route_unlock_node(rn); | |
1863 | ||
1864 | if (!have_usable_route) { | |
1865 | struct prefix *pfx_mon = prefix_new(); | |
1866 | prefix_copy(pfx_mon, prefix); | |
1867 | if (!skiplist_insert(it->monitor_exterior_orphans, info, | |
1868 | pfx_mon)) { | |
1869 | ||
1870 | bgp_info_lock(info); | |
1871 | } | |
1872 | } | |
1873 | } | |
65efcfce LB |
1874 | } |
1875 | ||
d62a17ae | 1876 | void vnc_import_bgp_exterior_add_route( |
1877 | struct bgp *bgp, /* exterior instance, we hope */ | |
1878 | struct prefix *prefix, /* unicast prefix */ | |
1879 | struct bgp_info *info) /* unicast info */ | |
65efcfce | 1880 | { |
d62a17ae | 1881 | vnc_import_bgp_exterior_add_route_it(bgp, prefix, info, NULL); |
65efcfce LB |
1882 | } |
1883 | ||
1884 | /* | |
1885 | * There should be only one of these per prefix at a time. | |
1886 | * This should probably be called as a result of selection operation. | |
1887 | * | |
1888 | * NB should be called espacially for bgp instances that are named, | |
1889 | * because the exterior routes will always come from one of those. | |
1890 | * We filter here on the instance name to make sure we get only the | |
1891 | * right routes. | |
1892 | */ | |
d62a17ae | 1893 | void vnc_import_bgp_exterior_del_route( |
1894 | struct bgp *bgp, struct prefix *prefix, /* unicast prefix */ | |
1895 | struct bgp_info *info) /* unicast info */ | |
65efcfce | 1896 | { |
d62a17ae | 1897 | struct rfapi *h; |
1898 | struct rfapi_cfg *hc; | |
1899 | struct rfapi_import_table *it; | |
1900 | struct prefix pfx_orig_nexthop; | |
1901 | afi_t afi = family2afi(prefix->family); | |
1902 | struct bgp *bgp_default = bgp_get_default(); | |
1903 | ||
1904 | if (!bgp_default) | |
1905 | return; | |
1906 | ||
1907 | memset(&pfx_orig_nexthop, 0, | |
1908 | sizeof(struct prefix)); /* keep valgrind happy */ | |
1909 | ||
1910 | h = bgp_default->rfapi; | |
1911 | hc = bgp_default->rfapi_cfg; | |
1912 | ||
1913 | if (!h || !hc) { | |
1914 | vnc_zlog_debug_verbose( | |
1915 | "%s: rfapi or rfapi_cfg not instantiated, skipping", | |
1916 | __func__); | |
1917 | return; | |
1918 | } | |
1919 | if (!hc->redist_bgp_exterior_view) { | |
1920 | vnc_zlog_debug_verbose("%s: exterior view not set, skipping", | |
1921 | __func__); | |
1922 | return; | |
1923 | } | |
1924 | if (bgp != hc->redist_bgp_exterior_view) { | |
1925 | vnc_zlog_debug_verbose( | |
1926 | "%s: bgp %p != hc->redist_bgp_exterior_view %p, skipping", | |
1927 | __func__, bgp, hc->redist_bgp_exterior_view); | |
1928 | return; | |
1929 | } | |
1930 | if (!hc->redist[afi][ZEBRA_ROUTE_BGP_DIRECT_EXT]) { | |
1931 | vnc_zlog_debug_verbose( | |
1932 | "%s: redist of exterior routes no enabled, skipping", | |
1933 | __func__); | |
1934 | return; | |
1935 | } | |
1936 | ||
1937 | if (!info->attr) { | |
1938 | vnc_zlog_debug_verbose("%s: no info, skipping", __func__); | |
1939 | return; | |
1940 | } | |
1941 | ||
1942 | /* | |
1943 | * Extract nexthop from exterior route | |
1944 | * | |
1945 | * Incoming prefix is unicast. If v6, it is in multiprotocol area, | |
1946 | * but if v4 it is in attr->nexthop | |
1947 | */ | |
1948 | rfapiUnicastNexthop2Prefix(afi, info->attr, &pfx_orig_nexthop); | |
1949 | ||
1950 | for (it = h->imports; it; it = it->next) { | |
1951 | struct route_table *table; | |
1952 | struct route_node *rn; | |
1953 | struct route_node *par; | |
1954 | struct bgp_info *bi_interior; | |
1955 | int have_usable_route; | |
1956 | ||
1957 | table = it->imported_vpn[afi]; | |
1958 | ||
1959 | for (rn = route_node_match(table, &pfx_orig_nexthop), | |
1960 | have_usable_route = 0; | |
1961 | (!have_usable_route) && rn;) { | |
1962 | ||
1963 | for (bi_interior = rn->info; bi_interior; | |
1964 | bi_interior = bi_interior->next) { | |
1965 | struct prefix_rd *prd; | |
1966 | u_int32_t label = 0; | |
1967 | ||
1968 | if (!is_usable_interior_route(bi_interior)) | |
1969 | continue; | |
1970 | ||
1971 | /* | |
1972 | * have a legitimate route to exterior's nexthop | |
1973 | * via NVE. | |
1974 | * | |
1975 | * Import unicast route to the import table | |
1976 | */ | |
1977 | have_usable_route = 1; | |
1978 | ||
1979 | if (bi_interior->extra) { | |
1980 | prd = &bi_interior->extra->vnc.import | |
1981 | .rd; | |
1982 | label = decode_label( | |
1983 | &bi_interior->extra->label); | |
1984 | } else | |
1985 | prd = NULL; | |
1986 | ||
1987 | rfapiBgpInfoFilteredImportVPN( | |
1988 | it, FIF_ACTION_KILL, bi_interior->peer, | |
1989 | NULL, /* rfd */ | |
1990 | prefix, NULL, afi, prd, | |
1991 | bi_interior->attr, | |
1992 | ZEBRA_ROUTE_BGP_DIRECT_EXT, | |
1993 | BGP_ROUTE_REDISTRIBUTE, &label); | |
1994 | ||
1995 | /* | |
1996 | * Delete monitor | |
1997 | * | |
1998 | * TBD factor this out into its own function | |
1999 | */ | |
2000 | { | |
2001 | if (RFAPI_MONITOR_EXTERIOR(rn) | |
2002 | ->source) { | |
2003 | if (!skiplist_delete( | |
2004 | RFAPI_MONITOR_EXTERIOR( | |
2005 | rn) | |
2006 | ->source, | |
2007 | info, NULL)) { | |
2008 | ||
2009 | bgp_info_unlock(info); | |
2010 | route_unlock_node( | |
2011 | rn); /* sl entry | |
9d303b37 | 2012 | */ |
d62a17ae | 2013 | } |
2014 | if (skiplist_empty( | |
2015 | RFAPI_MONITOR_EXTERIOR( | |
2016 | rn) | |
2017 | ->source)) { | |
2018 | skiplist_free( | |
2019 | RFAPI_MONITOR_EXTERIOR( | |
2020 | rn) | |
2021 | ->source); | |
2022 | RFAPI_MONITOR_EXTERIOR( | |
2023 | rn) | |
2024 | ->source = NULL; | |
2025 | route_unlock_node( | |
2026 | rn); /* skiplist | |
2027 | itself | |
2028 | */ | |
2029 | } | |
2030 | } | |
2031 | } | |
2032 | } | |
2033 | par = rn->parent; | |
2034 | if (par) | |
2035 | route_lock_node(par); | |
2036 | route_unlock_node(rn); | |
2037 | rn = par; | |
2038 | } | |
2039 | if (rn) | |
2040 | route_unlock_node(rn); | |
2041 | ||
2042 | if (!have_usable_route) { | |
2043 | if (!skiplist_delete(it->monitor_exterior_orphans, info, | |
2044 | NULL)) { | |
2045 | ||
2046 | bgp_info_unlock(info); | |
2047 | } | |
2048 | } | |
2049 | } | |
65efcfce LB |
2050 | } |
2051 | ||
2052 | /* | |
2053 | * This function should be called after a new interior VPN route | |
2054 | * has been added to an import_table. | |
2055 | * | |
2056 | * NB should also be called whenever an existing vpn interior route | |
2057 | * becomes valid (e.g., valid_interior_count is inremented) | |
2058 | */ | |
d62a17ae | 2059 | void vnc_import_bgp_exterior_add_route_interior( |
2060 | struct bgp *bgp, struct rfapi_import_table *it, | |
2061 | struct route_node *rn_interior, /* VPN IT node */ | |
2062 | struct bgp_info *bi_interior) /* VPN IT route */ | |
65efcfce | 2063 | { |
d62a17ae | 2064 | afi_t afi = family2afi(rn_interior->p.family); |
2065 | struct route_node *par; | |
2066 | struct bgp_info *bi_exterior; | |
2067 | struct prefix *pfx_exterior; /* exterior pfx */ | |
2068 | void *cursor; | |
2069 | int rc; | |
2070 | struct list *list_adopted; | |
2071 | ||
2072 | vnc_zlog_debug_verbose("%s: entry", __func__); | |
2073 | ||
2074 | if (!is_usable_interior_route(bi_interior)) { | |
2075 | vnc_zlog_debug_verbose( | |
2076 | "%s: not usable interior route, skipping", __func__); | |
2077 | return; | |
2078 | } | |
2079 | ||
2080 | if (!bgp->rfapi_cfg->redist[afi][ZEBRA_ROUTE_BGP_DIRECT_EXT]) { | |
2081 | vnc_zlog_debug_verbose( | |
2082 | "%s: redist of exterior routes no enabled, skipping", | |
2083 | __func__); | |
2084 | return; | |
2085 | } | |
2086 | ||
2087 | if (it == bgp->rfapi->it_ce) { | |
2088 | vnc_zlog_debug_verbose("%s: import table is it_ce, skipping", | |
2089 | __func__); | |
2090 | return; | |
2091 | } | |
2092 | ||
2093 | /*debugging */ | |
2094 | { | |
2095 | char str_pfx[BUFSIZ]; | |
2096 | ||
2097 | prefix2str(&rn_interior->p, str_pfx, BUFSIZ); | |
2098 | str_pfx[BUFSIZ - 1] = 0; | |
2099 | ||
2100 | vnc_zlog_debug_verbose("%s: interior prefix=%s, bi type=%d", | |
2101 | __func__, str_pfx, bi_interior->type); | |
2102 | } | |
2103 | ||
2104 | if (RFAPI_HAS_MONITOR_EXTERIOR(rn_interior)) { | |
2105 | ||
2106 | int count = 0; /* debugging */ | |
2107 | ||
2108 | vnc_zlog_debug_verbose( | |
2109 | "%s: has exterior monitor; ext src: %p", __func__, | |
2110 | RFAPI_MONITOR_EXTERIOR(rn_interior)->source); | |
2111 | ||
2112 | /* | |
2113 | * There is a monitor here already. Therefore, we do not need | |
2114 | * to do any pulldown. Just construct exterior routes based | |
2115 | * on the new interior route. | |
2116 | */ | |
2117 | cursor = NULL; | |
2118 | for (rc = skiplist_next( | |
2119 | RFAPI_MONITOR_EXTERIOR(rn_interior)->source, | |
2120 | (void **)&bi_exterior, (void **)&pfx_exterior, | |
2121 | &cursor); | |
2122 | !rc; rc = skiplist_next( | |
2123 | RFAPI_MONITOR_EXTERIOR(rn_interior)->source, | |
2124 | (void **)&bi_exterior, (void **)&pfx_exterior, | |
2125 | &cursor)) { | |
2126 | ||
2127 | struct prefix_rd *prd; | |
2128 | struct attr new_attr; | |
2129 | u_int32_t label = 0; | |
2130 | ||
2131 | ||
2132 | ++count; /* debugging */ | |
2133 | ||
2134 | assert(bi_exterior); | |
2135 | assert(pfx_exterior); | |
2136 | ||
2137 | if (bi_interior->extra) { | |
2138 | prd = &bi_interior->extra->vnc.import.rd; | |
2139 | label = decode_label( | |
2140 | &bi_interior->extra->label); | |
2141 | } else | |
2142 | prd = NULL; | |
2143 | ||
2144 | /* use local_pref from unicast route */ | |
2145 | memset(&new_attr, 0, sizeof(struct attr)); | |
2146 | bgp_attr_dup(&new_attr, bi_interior->attr); | |
2147 | if (bi_exterior | |
2148 | && (bi_exterior->attr->flag | |
2149 | & ATTR_FLAG_BIT(BGP_ATTR_LOCAL_PREF))) { | |
2150 | new_attr.local_pref = | |
2151 | bi_exterior->attr->local_pref; | |
2152 | new_attr.flag |= | |
2153 | ATTR_FLAG_BIT(BGP_ATTR_LOCAL_PREF); | |
2154 | } | |
2155 | ||
2156 | rfapiBgpInfoFilteredImportVPN( | |
2157 | it, FIF_ACTION_UPDATE, bi_interior->peer, | |
2158 | NULL, /* rfd */ | |
2159 | pfx_exterior, NULL, afi, prd, &new_attr, | |
2160 | ZEBRA_ROUTE_BGP_DIRECT_EXT, | |
2161 | BGP_ROUTE_REDISTRIBUTE, &label); | |
2162 | } | |
2163 | vnc_zlog_debug_verbose( | |
2164 | "%s: finished constructing exteriors based on existing monitors", | |
2165 | __func__); | |
2166 | return; | |
2167 | } | |
2168 | ||
2169 | vnc_zlog_debug_verbose("%s: no exterior monitor", __func__); | |
2170 | ||
2171 | /* | |
2172 | * No monitor at this node. Is this the first valid interior | |
2173 | * route at this node? | |
2174 | */ | |
2175 | if (RFAPI_MONITOR_EXTERIOR(rn_interior)->valid_interior_count > 1) { | |
2176 | vnc_zlog_debug_verbose( | |
2177 | "%s: new interior route not first valid one, skipping pulldown", | |
2178 | __func__); | |
2179 | return; | |
2180 | } | |
2181 | ||
2182 | /* | |
2183 | * Look up the tree for possible pulldown candidates. | |
2184 | * Find nearest parent with an exterior route monitor | |
2185 | */ | |
2186 | for (par = rn_interior->parent; par; par = par->parent) { | |
2187 | if (RFAPI_HAS_MONITOR_EXTERIOR(par)) | |
2188 | break; | |
2189 | } | |
2190 | ||
2191 | if (par) { | |
2192 | ||
2193 | vnc_zlog_debug_verbose( | |
2194 | "%s: checking parent %p for possible pulldowns", | |
2195 | __func__, par); | |
2196 | ||
2197 | /* check monitors at par for possible pulldown */ | |
2198 | cursor = NULL; | |
2199 | for (rc = skiplist_next(RFAPI_MONITOR_EXTERIOR(par)->source, | |
2200 | (void **)&bi_exterior, | |
2201 | (void **)&pfx_exterior, &cursor); | |
2202 | !rc; | |
2203 | rc = skiplist_next(RFAPI_MONITOR_EXTERIOR(par)->source, | |
2204 | (void **)&bi_exterior, | |
2205 | (void **)&pfx_exterior, &cursor)) { | |
2206 | ||
2207 | struct prefix pfx_nexthop; | |
2208 | ||
2209 | memset(&pfx_nexthop, 0, | |
2210 | sizeof(struct prefix)); /* keep valgrind happy */ | |
2211 | ||
2212 | /* check original nexthop for prefix match */ | |
2213 | rfapiUnicastNexthop2Prefix(afi, bi_exterior->attr, | |
2214 | &pfx_nexthop); | |
2215 | ||
2216 | if (prefix_match(&rn_interior->p, &pfx_nexthop)) { | |
2217 | ||
2218 | struct bgp_info *bi; | |
2219 | struct prefix_rd *prd; | |
2220 | struct attr new_attr; | |
2221 | u_int32_t label = 0; | |
2222 | ||
2223 | /* do pull-down */ | |
2224 | ||
2225 | /* | |
2226 | * add monitor to longer prefix | |
2227 | */ | |
2228 | struct prefix *pfx_mon = prefix_new(); | |
2229 | prefix_copy(pfx_mon, pfx_exterior); | |
2230 | if (!RFAPI_MONITOR_EXTERIOR(rn_interior) | |
2231 | ->source) { | |
2232 | RFAPI_MONITOR_EXTERIOR(rn_interior) | |
2233 | ->source = skiplist_new( | |
2234 | 0, NULL, | |
2235 | (void (*)(void *))prefix_free); | |
2236 | route_lock_node(rn_interior); | |
2237 | } | |
2238 | skiplist_insert( | |
2239 | RFAPI_MONITOR_EXTERIOR(rn_interior) | |
2240 | ->source, | |
2241 | bi_exterior, pfx_mon); | |
2242 | route_lock_node(rn_interior); | |
2243 | ||
2244 | /* | |
2245 | * Delete constructed exterior routes based on | |
2246 | * parent routes. | |
2247 | */ | |
2248 | for (bi = par->info; bi; bi = bi->next) { | |
2249 | ||
2250 | if (bi->extra) { | |
2251 | prd = &bi->extra->vnc.import.rd; | |
2252 | label = decode_label( | |
2253 | &bi->extra->label); | |
2254 | } else | |
2255 | prd = NULL; | |
2256 | ||
2257 | rfapiBgpInfoFilteredImportVPN( | |
2258 | it, FIF_ACTION_KILL, bi->peer, | |
2259 | NULL, /* rfd */ | |
2260 | pfx_exterior, NULL, afi, prd, | |
2261 | bi->attr, | |
2262 | ZEBRA_ROUTE_BGP_DIRECT_EXT, | |
2263 | BGP_ROUTE_REDISTRIBUTE, &label); | |
2264 | } | |
2265 | ||
2266 | ||
2267 | /* | |
2268 | * Add constructed exterior routes based on | |
2269 | * the new interior route at longer prefix. | |
2270 | */ | |
2271 | if (bi_interior->extra) { | |
2272 | prd = &bi_interior->extra->vnc.import | |
2273 | .rd; | |
2274 | label = decode_label( | |
2275 | &bi_interior->extra->label); | |
2276 | } else | |
2277 | prd = NULL; | |
2278 | ||
2279 | /* use local_pref from unicast route */ | |
2280 | memset(&new_attr, 0, sizeof(struct attr)); | |
2281 | bgp_attr_dup(&new_attr, bi_interior->attr); | |
2282 | if (bi_exterior | |
2283 | && (bi_exterior->attr->flag | |
2284 | & ATTR_FLAG_BIT(BGP_ATTR_LOCAL_PREF))) { | |
2285 | new_attr.local_pref = | |
2286 | bi_exterior->attr->local_pref; | |
2287 | new_attr.flag |= ATTR_FLAG_BIT( | |
2288 | BGP_ATTR_LOCAL_PREF); | |
2289 | } | |
2290 | ||
2291 | rfapiBgpInfoFilteredImportVPN( | |
2292 | it, FIF_ACTION_UPDATE, | |
2293 | bi_interior->peer, NULL, /* rfd */ | |
2294 | pfx_exterior, NULL, afi, prd, &new_attr, | |
2295 | ZEBRA_ROUTE_BGP_DIRECT_EXT, | |
2296 | BGP_ROUTE_REDISTRIBUTE, &label); | |
2297 | } | |
2298 | } | |
2299 | ||
2300 | /* | |
2301 | * The only monitors at rn_interior are the ones we added just | |
2302 | * above, so we can use the rn_interior list to identify which | |
2303 | * monitors to delete from the parent. | |
2304 | */ | |
2305 | cursor = NULL; | |
2306 | for (rc = skiplist_next( | |
2307 | RFAPI_MONITOR_EXTERIOR(rn_interior)->source, | |
2308 | (void **)&bi_exterior, NULL, &cursor); | |
2309 | !rc; rc = skiplist_next( | |
2310 | RFAPI_MONITOR_EXTERIOR(rn_interior)->source, | |
2311 | (void **)&bi_exterior, NULL, &cursor)) { | |
2312 | ||
2313 | ||
2314 | skiplist_delete(RFAPI_MONITOR_EXTERIOR(par)->source, | |
2315 | bi_exterior, NULL); | |
2316 | route_unlock_node(par); /* sl entry */ | |
2317 | } | |
2318 | if (skiplist_empty(RFAPI_MONITOR_EXTERIOR(par)->source)) { | |
2319 | skiplist_free(RFAPI_MONITOR_EXTERIOR(par)->source); | |
2320 | RFAPI_MONITOR_EXTERIOR(par)->source = NULL; | |
2321 | route_unlock_node(par); /* sl itself */ | |
2322 | } | |
2323 | } | |
2324 | ||
2325 | vnc_zlog_debug_verbose("%s: checking orphans", __func__); | |
2326 | ||
2327 | /* | |
2328 | * See if any orphans can be pulled down to the current node | |
2329 | */ | |
2330 | cursor = NULL; | |
2331 | list_adopted = NULL; | |
2332 | for (rc = skiplist_next(it->monitor_exterior_orphans, | |
2333 | (void **)&bi_exterior, (void **)&pfx_exterior, | |
2334 | &cursor); | |
2335 | !rc; rc = skiplist_next(it->monitor_exterior_orphans, | |
2336 | (void **)&bi_exterior, | |
2337 | (void **)&pfx_exterior, &cursor)) { | |
2338 | ||
2339 | struct prefix pfx_nexthop; | |
2340 | char buf[BUFSIZ]; | |
2341 | afi_t afi_exterior = family2afi(pfx_exterior->family); | |
2342 | ||
2343 | prefix2str(pfx_exterior, buf, sizeof(buf)); | |
2344 | buf[sizeof(buf) - 1] = 0; | |
2345 | vnc_zlog_debug_verbose( | |
2346 | "%s: checking exterior orphan at prefix %s", __func__, | |
2347 | buf); | |
2348 | ||
2349 | if (afi_exterior != afi) { | |
2350 | vnc_zlog_debug_verbose( | |
2351 | "%s: exterior orphan afi %d != interior afi %d, skip", | |
2352 | __func__, afi_exterior, afi); | |
2353 | continue; | |
2354 | } | |
2355 | ||
2356 | /* check original nexthop for prefix match */ | |
2357 | rfapiUnicastNexthop2Prefix(afi, bi_exterior->attr, | |
2358 | &pfx_nexthop); | |
2359 | ||
2360 | if (prefix_match(&rn_interior->p, &pfx_nexthop)) { | |
2361 | ||
2362 | struct prefix_rd *prd; | |
2363 | struct attr new_attr; | |
2364 | u_int32_t label = 0; | |
2365 | ||
2366 | /* do pull-down */ | |
2367 | ||
2368 | /* | |
2369 | * add monitor to longer prefix | |
2370 | */ | |
2371 | ||
2372 | struct prefix *pfx_mon = prefix_new(); | |
2373 | prefix_copy(pfx_mon, pfx_exterior); | |
2374 | if (!RFAPI_MONITOR_EXTERIOR(rn_interior)->source) { | |
2375 | RFAPI_MONITOR_EXTERIOR(rn_interior)->source = | |
2376 | skiplist_new( | |
2377 | 0, NULL, | |
2378 | (void (*)(void *))prefix_free); | |
2379 | route_lock_node(rn_interior); /* sl */ | |
2380 | } | |
2381 | skiplist_insert( | |
2382 | RFAPI_MONITOR_EXTERIOR(rn_interior)->source, | |
2383 | bi_exterior, pfx_mon); | |
2384 | route_lock_node(rn_interior); /* sl entry */ | |
2385 | if (!list_adopted) { | |
2386 | list_adopted = list_new(); | |
2387 | } | |
2388 | listnode_add(list_adopted, bi_exterior); | |
2389 | ||
2390 | /* | |
2391 | * Add constructed exterior routes based on the | |
2392 | * new interior route at the longer prefix. | |
2393 | */ | |
2394 | if (bi_interior->extra) { | |
2395 | prd = &bi_interior->extra->vnc.import.rd; | |
2396 | label = decode_label( | |
2397 | &bi_interior->extra->label); | |
2398 | } else | |
2399 | prd = NULL; | |
2400 | ||
2401 | /* use local_pref from unicast route */ | |
2402 | memset(&new_attr, 0, sizeof(struct attr)); | |
2403 | bgp_attr_dup(&new_attr, bi_interior->attr); | |
2404 | if (bi_exterior | |
2405 | && (bi_exterior->attr->flag | |
2406 | & ATTR_FLAG_BIT(BGP_ATTR_LOCAL_PREF))) { | |
2407 | new_attr.local_pref = | |
2408 | bi_exterior->attr->local_pref; | |
2409 | new_attr.flag |= | |
2410 | ATTR_FLAG_BIT(BGP_ATTR_LOCAL_PREF); | |
2411 | } | |
2412 | ||
2413 | rfapiBgpInfoFilteredImportVPN( | |
2414 | it, FIF_ACTION_UPDATE, bi_interior->peer, | |
2415 | NULL, /* rfd */ | |
2416 | pfx_exterior, NULL, afi, prd, &new_attr, | |
2417 | ZEBRA_ROUTE_BGP_DIRECT_EXT, | |
2418 | BGP_ROUTE_REDISTRIBUTE, &label); | |
2419 | } | |
2420 | } | |
2421 | if (list_adopted) { | |
2422 | struct listnode *node; | |
2423 | struct route_node *bi_exterior; | |
2424 | ||
2425 | for (ALL_LIST_ELEMENTS_RO(list_adopted, node, bi_exterior)) { | |
2426 | skiplist_delete(it->monitor_exterior_orphans, | |
2427 | bi_exterior, NULL); | |
2428 | } | |
affe9e99 | 2429 | list_delete_and_null(&list_adopted); |
d62a17ae | 2430 | } |
65efcfce LB |
2431 | } |
2432 | ||
2433 | /* | |
2434 | * This function should be called after an interior VPN route | |
2435 | * has been deleted from an import_table. | |
2436 | * bi_interior must still be valid, but it must already be detached | |
2437 | * from its route node and the route node's valid_interior_count | |
2438 | * must already be decremented. | |
2439 | * | |
2440 | * NB should also be called whenever an existing vpn interior route | |
2441 | * becomes invalid (e.g., valid_interior_count is decremented) | |
2442 | */ | |
d62a17ae | 2443 | void vnc_import_bgp_exterior_del_route_interior( |
2444 | struct bgp *bgp, struct rfapi_import_table *it, | |
2445 | struct route_node *rn_interior, /* VPN IT node */ | |
2446 | struct bgp_info *bi_interior) /* VPN IT route */ | |
65efcfce | 2447 | { |
d62a17ae | 2448 | afi_t afi = family2afi(rn_interior->p.family); |
2449 | struct route_node *par; | |
2450 | struct bgp_info *bi_exterior; | |
2451 | struct prefix *pfx_exterior; /* exterior pfx */ | |
2452 | void *cursor; | |
2453 | int rc; | |
2454 | ||
2455 | if (!VALID_INTERIOR_TYPE(bi_interior->type)) { | |
2456 | vnc_zlog_debug_verbose( | |
2457 | "%s: type %d not valid interior type, skipping", | |
2458 | __func__, bi_interior->type); | |
2459 | return; | |
2460 | } | |
2461 | ||
2462 | if (!bgp->rfapi_cfg->redist[afi][ZEBRA_ROUTE_BGP_DIRECT_EXT]) { | |
2463 | vnc_zlog_debug_verbose( | |
2464 | "%s: redist of exterior routes no enabled, skipping", | |
2465 | __func__); | |
2466 | return; | |
2467 | } | |
2468 | ||
2469 | if (it == bgp->rfapi->it_ce) { | |
2470 | vnc_zlog_debug_verbose("%s: it is it_ce, skipping", __func__); | |
2471 | return; | |
2472 | } | |
2473 | ||
2474 | /* If no exterior routes depend on this prefix, nothing to do */ | |
2475 | if (!RFAPI_HAS_MONITOR_EXTERIOR(rn_interior)) { | |
2476 | vnc_zlog_debug_verbose("%s: no exterior monitor, skipping", | |
2477 | __func__); | |
2478 | return; | |
2479 | } | |
2480 | ||
2481 | /*debugging */ | |
2482 | { | |
2483 | char str_pfx[BUFSIZ]; | |
2484 | ||
2485 | prefix2str(&rn_interior->p, str_pfx, BUFSIZ); | |
2486 | str_pfx[BUFSIZ - 1] = 0; | |
2487 | ||
2488 | vnc_zlog_debug_verbose("%s: interior prefix=%s, bi type=%d", | |
2489 | __func__, str_pfx, bi_interior->type); | |
2490 | } | |
2491 | ||
2492 | /* | |
2493 | * Remove constructed routes based on the deleted interior route | |
2494 | */ | |
2495 | cursor = NULL; | |
2496 | for (rc = skiplist_next(RFAPI_MONITOR_EXTERIOR(rn_interior)->source, | |
2497 | (void **)&bi_exterior, (void **)&pfx_exterior, | |
2498 | &cursor); | |
2499 | !rc; | |
2500 | rc = skiplist_next(RFAPI_MONITOR_EXTERIOR(rn_interior)->source, | |
2501 | (void **)&bi_exterior, (void **)&pfx_exterior, | |
2502 | &cursor)) { | |
2503 | ||
2504 | struct prefix_rd *prd; | |
2505 | u_int32_t label = 0; | |
2506 | ||
2507 | if (bi_interior->extra) { | |
2508 | prd = &bi_interior->extra->vnc.import.rd; | |
2509 | label = decode_label(&bi_interior->extra->label); | |
2510 | } else | |
2511 | prd = NULL; | |
2512 | ||
2513 | rfapiBgpInfoFilteredImportVPN( | |
2514 | it, FIF_ACTION_KILL, bi_interior->peer, NULL, /* rfd */ | |
2515 | pfx_exterior, NULL, afi, prd, bi_interior->attr, | |
2516 | ZEBRA_ROUTE_BGP_DIRECT_EXT, BGP_ROUTE_REDISTRIBUTE, | |
2517 | &label); | |
2518 | } | |
2519 | ||
2520 | /* | |
2521 | * If there are no remaining valid interior routes at this prefix, | |
2522 | * we need to look up the tree for a possible node to move monitors to | |
2523 | */ | |
2524 | if (RFAPI_MONITOR_EXTERIOR(rn_interior)->valid_interior_count) { | |
2525 | vnc_zlog_debug_verbose( | |
2526 | "%s: interior routes still present, skipping", | |
2527 | __func__); | |
2528 | return; | |
2529 | } | |
65efcfce | 2530 | |
d62a17ae | 2531 | /* |
2532 | * Find nearest parent with at least one valid interior route | |
2533 | * If none is found, par will end up NULL, and we will move | |
2534 | * the monitors to the orphan list for this import table | |
2535 | */ | |
2536 | for (par = rn_interior->parent; par; par = par->parent) { | |
2537 | if (RFAPI_MONITOR_EXTERIOR(par)->valid_interior_count) | |
2538 | break; | |
2539 | } | |
2540 | ||
2541 | vnc_zlog_debug_verbose("%s: par=%p, ext src: %p", __func__, par, | |
2542 | RFAPI_MONITOR_EXTERIOR(rn_interior)->source); | |
2543 | ||
2544 | /* move all monitors */ | |
2545 | /* | |
2546 | * We will use and delete every element of the source skiplist | |
2547 | */ | |
2548 | while (!skiplist_first(RFAPI_MONITOR_EXTERIOR(rn_interior)->source, | |
2549 | (void **)&bi_exterior, (void **)&pfx_exterior)) { | |
2550 | ||
2551 | struct prefix *pfx_mon = prefix_new(); | |
2552 | ||
2553 | prefix_copy(pfx_mon, pfx_exterior); | |
2554 | ||
2555 | if (par) { | |
2556 | ||
2557 | struct bgp_info *bi; | |
2558 | ||
2559 | /* | |
2560 | * Add monitor to parent node | |
2561 | */ | |
2562 | if (!RFAPI_MONITOR_EXTERIOR(par)->source) { | |
2563 | RFAPI_MONITOR_EXTERIOR(par)->source = | |
2564 | skiplist_new( | |
2565 | 0, NULL, | |
2566 | (void (*)(void *))prefix_free); | |
2567 | route_lock_node(par); /* sl */ | |
2568 | } | |
2569 | skiplist_insert(RFAPI_MONITOR_EXTERIOR(par)->source, | |
2570 | bi_exterior, pfx_mon); | |
2571 | route_lock_node(par); /* sl entry */ | |
2572 | ||
2573 | /* Add constructed exterior routes based on parent */ | |
2574 | for (bi = par->info; bi; bi = bi->next) { | |
2575 | ||
2576 | struct prefix_rd *prd; | |
2577 | struct attr new_attr; | |
2578 | u_int32_t label = 0; | |
2579 | ||
2580 | if (bi->type == ZEBRA_ROUTE_BGP_DIRECT_EXT) | |
2581 | continue; | |
2582 | ||
2583 | if (bi->extra) { | |
2584 | prd = &bi->extra->vnc.import.rd; | |
2585 | label = decode_label(&bi->extra->label); | |
2586 | } else | |
2587 | prd = NULL; | |
2588 | ||
2589 | /* use local_pref from unicast route */ | |
2590 | memset(&new_attr, 0, sizeof(struct attr)); | |
2591 | bgp_attr_dup(&new_attr, bi->attr); | |
2592 | if (bi_exterior | |
2593 | && (bi_exterior->attr->flag | |
2594 | & ATTR_FLAG_BIT(BGP_ATTR_LOCAL_PREF))) { | |
2595 | new_attr.local_pref = | |
2596 | bi_exterior->attr->local_pref; | |
2597 | new_attr.flag |= ATTR_FLAG_BIT( | |
2598 | BGP_ATTR_LOCAL_PREF); | |
2599 | } | |
2600 | ||
2601 | rfapiBgpInfoFilteredImportVPN( | |
2602 | it, FIF_ACTION_UPDATE, bi->peer, | |
2603 | NULL, /* rfd */ | |
2604 | pfx_exterior, NULL, afi, prd, &new_attr, | |
2605 | ZEBRA_ROUTE_BGP_DIRECT_EXT, | |
2606 | BGP_ROUTE_REDISTRIBUTE, &label); | |
2607 | } | |
2608 | ||
2609 | } else { | |
2610 | ||
2611 | /* | |
2612 | * No interior route for exterior's nexthop. Save | |
2613 | * monitor | |
2614 | * in orphan list to await future route. | |
2615 | */ | |
2616 | skiplist_insert(it->monitor_exterior_orphans, | |
2617 | bi_exterior, pfx_mon); | |
2618 | } | |
2619 | ||
2620 | skiplist_delete_first( | |
2621 | RFAPI_MONITOR_EXTERIOR(rn_interior)->source); | |
2622 | route_unlock_node(rn_interior); /* sl entry */ | |
2623 | } | |
2624 | if (skiplist_empty(RFAPI_MONITOR_EXTERIOR(rn_interior)->source)) { | |
2625 | skiplist_free(RFAPI_MONITOR_EXTERIOR(rn_interior)->source); | |
2626 | RFAPI_MONITOR_EXTERIOR(rn_interior)->source = NULL; | |
2627 | route_unlock_node(rn_interior); /* sl itself */ | |
2628 | } | |
65efcfce LB |
2629 | } |
2630 | ||
2631 | /*********************************************************************** | |
2632 | * Generic add/delete unicast routes | |
2633 | ***********************************************************************/ | |
2634 | ||
d62a17ae | 2635 | void vnc_import_bgp_add_route(struct bgp *bgp, struct prefix *prefix, |
2636 | struct bgp_info *info) | |
65efcfce | 2637 | { |
d62a17ae | 2638 | afi_t afi = family2afi(prefix->family); |
65efcfce | 2639 | |
d62a17ae | 2640 | { |
2641 | struct prefix pfx_nexthop; | |
2642 | char buf[BUFSIZ]; | |
2643 | char buf_nh[BUFSIZ]; | |
65efcfce | 2644 | |
d62a17ae | 2645 | prefix2str(prefix, buf, BUFSIZ); |
2646 | rfapiUnicastNexthop2Prefix(afi, info->attr, &pfx_nexthop); | |
2647 | prefix2str(&pfx_nexthop, buf_nh, BUFSIZ); | |
65efcfce | 2648 | |
d62a17ae | 2649 | vnc_zlog_debug_verbose("%s: pfx %s, nh %s", __func__, buf, |
2650 | buf_nh); | |
2651 | } | |
65efcfce | 2652 | #if DEBUG_RHN_LIST |
d62a17ae | 2653 | print_rhn_list(__func__, "ENTER "); |
65efcfce | 2654 | #endif |
d62a17ae | 2655 | VNC_RHNCK(enter); |
2656 | ||
2657 | if (!afi) { | |
2658 | zlog_err("%s: can't get afi of prefix", __func__); | |
2659 | return; | |
2660 | } | |
2661 | ||
2662 | if (!bgp->rfapi_cfg) { | |
2663 | vnc_zlog_debug_verbose("%s: bgp->rfapi_cfg is NULL, skipping", | |
2664 | __func__); | |
2665 | return; | |
2666 | } | |
2667 | ||
2668 | /* check vnc redist flag for bgp direct routes */ | |
2669 | if (!bgp->rfapi_cfg->redist[afi][ZEBRA_ROUTE_BGP_DIRECT]) { | |
2670 | vnc_zlog_debug_verbose( | |
2671 | "%s: bgp->rfapi_cfg->redist[afi=%d][type=%d=ZEBRA_ROUTE_BGP_DIRECT] is 0, skipping", | |
2672 | __func__, afi, ZEBRA_ROUTE_BGP_DIRECT); | |
2673 | return; | |
2674 | } | |
2675 | ||
2676 | switch (bgp->rfapi_cfg->redist_mode) { | |
2677 | case VNC_REDIST_MODE_PLAIN: | |
2678 | vnc_import_bgp_add_route_mode_plain(bgp, prefix, info); | |
2679 | break; | |
2680 | ||
2681 | case VNC_REDIST_MODE_RFG: | |
2682 | if (bgp->rfapi_cfg->rfg_redist) | |
2683 | vnc_import_bgp_add_route_mode_nvegroup( | |
2684 | bgp, prefix, info, bgp->rfapi_cfg->rfg_redist); | |
2685 | else | |
2686 | vnc_zlog_debug_verbose("%s: mode RFG but no redist RFG", | |
2687 | __func__); | |
2688 | break; | |
2689 | ||
2690 | case VNC_REDIST_MODE_RESOLVE_NVE: | |
2691 | vnc_import_bgp_add_route_mode_resolve_nve(bgp, prefix, info); | |
2692 | break; | |
2693 | } | |
65efcfce | 2694 | #if DEBUG_RHN_LIST |
d62a17ae | 2695 | print_rhn_list(__func__, "LEAVE "); |
65efcfce | 2696 | #endif |
d62a17ae | 2697 | VNC_RHNCK(leave); |
65efcfce LB |
2698 | } |
2699 | ||
2700 | /* | |
2701 | * "Withdrawing a Route" import process | |
2702 | */ | |
d62a17ae | 2703 | void vnc_import_bgp_del_route(struct bgp *bgp, struct prefix *prefix, |
2704 | struct bgp_info *info) /* unicast info */ | |
65efcfce | 2705 | { |
d62a17ae | 2706 | afi_t afi = family2afi(prefix->family); |
65efcfce | 2707 | |
d62a17ae | 2708 | assert(afi); |
65efcfce | 2709 | |
d62a17ae | 2710 | { |
2711 | struct prefix pfx_nexthop; | |
2712 | char buf[BUFSIZ]; | |
2713 | char buf_nh[BUFSIZ]; | |
65efcfce | 2714 | |
d62a17ae | 2715 | prefix2str(prefix, buf, BUFSIZ); |
2716 | rfapiUnicastNexthop2Prefix(afi, info->attr, &pfx_nexthop); | |
2717 | prefix2str(&pfx_nexthop, buf_nh, BUFSIZ); | |
65efcfce | 2718 | |
d62a17ae | 2719 | vnc_zlog_debug_verbose("%s: pfx %s, nh %s", __func__, buf, |
2720 | buf_nh); | |
2721 | } | |
65efcfce | 2722 | #if DEBUG_RHN_LIST |
d62a17ae | 2723 | print_rhn_list(__func__, "ENTER "); |
65efcfce | 2724 | #endif |
d62a17ae | 2725 | VNC_RHNCK(enter); |
2726 | ||
2727 | if (!bgp->rfapi_cfg) { | |
2728 | vnc_zlog_debug_verbose("%s: bgp->rfapi_cfg is NULL, skipping", | |
2729 | __func__); | |
2730 | return; | |
2731 | } | |
2732 | ||
2733 | /* check bgp redist flag for vnc direct ("vpn") routes */ | |
2734 | if (!bgp->rfapi_cfg->redist[afi][ZEBRA_ROUTE_BGP_DIRECT]) { | |
2735 | vnc_zlog_debug_verbose( | |
2736 | "%s: bgp redistribution of afi=%d VNC direct routes is off", | |
2737 | __func__, afi); | |
2738 | return; | |
2739 | } | |
2740 | ||
2741 | switch (bgp->rfapi_cfg->redist_mode) { | |
2742 | case VNC_REDIST_MODE_PLAIN: | |
2743 | vnc_import_bgp_del_route_mode_plain(bgp, prefix, info); | |
2744 | break; | |
2745 | ||
2746 | case VNC_REDIST_MODE_RFG: | |
2747 | if (bgp->rfapi_cfg->rfg_redist) | |
2748 | vnc_import_bgp_del_route_mode_nvegroup(bgp, prefix, | |
2749 | info); | |
2750 | else | |
2751 | vnc_zlog_debug_verbose("%s: mode RFG but no redist RFG", | |
2752 | __func__); | |
2753 | break; | |
2754 | ||
2755 | case VNC_REDIST_MODE_RESOLVE_NVE: | |
2756 | vnc_import_bgp_del_route_mode_resolve_nve(bgp, afi, prefix, | |
2757 | info); | |
2758 | break; | |
2759 | } | |
65efcfce | 2760 | #if DEBUG_RHN_LIST |
d62a17ae | 2761 | print_rhn_list(__func__, "LEAVE "); |
65efcfce | 2762 | #endif |
d62a17ae | 2763 | VNC_RHNCK(leave); |
65efcfce LB |
2764 | } |
2765 | ||
2766 | ||
2767 | /*********************************************************************** | |
2768 | * Enable/Disable | |
2769 | ***********************************************************************/ | |
2770 | ||
d62a17ae | 2771 | void vnc_import_bgp_redist_enable(struct bgp *bgp, afi_t afi) |
65efcfce | 2772 | { |
d62a17ae | 2773 | /* iterate over bgp unicast v4 and v6 routes, call |
2774 | * vnc_import_bgp_add_route */ | |
65efcfce | 2775 | |
d62a17ae | 2776 | struct bgp_node *rn; |
65efcfce | 2777 | |
d62a17ae | 2778 | vnc_zlog_debug_verbose("%s: entry, afi=%d", __func__, afi); |
65efcfce | 2779 | |
d62a17ae | 2780 | if (bgp->rfapi_cfg->redist[afi][ZEBRA_ROUTE_BGP_DIRECT]) { |
2781 | vnc_zlog_debug_verbose( | |
2782 | "%s: already enabled for afi %d, skipping", __func__, | |
2783 | afi); | |
2784 | return; | |
2785 | } | |
2786 | bgp->rfapi_cfg->redist[afi][ZEBRA_ROUTE_BGP_DIRECT] = 1; | |
65efcfce | 2787 | |
d62a17ae | 2788 | for (rn = bgp_table_top(bgp->rib[afi][SAFI_UNICAST]); rn; |
2789 | rn = bgp_route_next(rn)) { | |
65efcfce | 2790 | |
d62a17ae | 2791 | struct bgp_info *bi; |
65efcfce | 2792 | |
d62a17ae | 2793 | for (bi = rn->info; bi; bi = bi->next) { |
65efcfce | 2794 | |
d62a17ae | 2795 | if (CHECK_FLAG(bi->flags, BGP_INFO_REMOVED)) |
2796 | continue; | |
65efcfce | 2797 | |
d62a17ae | 2798 | vnc_import_bgp_add_route(bgp, &rn->p, bi); |
2799 | } | |
2800 | } | |
2801 | vnc_zlog_debug_verbose( | |
2802 | "%s: set redist[afi=%d][type=%d=ZEBRA_ROUTE_BGP_DIRECT] return", | |
2803 | __func__, afi, ZEBRA_ROUTE_BGP_DIRECT); | |
65efcfce LB |
2804 | } |
2805 | ||
d62a17ae | 2806 | void vnc_import_bgp_exterior_redist_enable(struct bgp *bgp, afi_t afi) |
65efcfce | 2807 | { |
d62a17ae | 2808 | struct bgp *bgp_exterior; |
2809 | struct bgp_node *rn; | |
65efcfce | 2810 | |
d62a17ae | 2811 | bgp_exterior = bgp->rfapi_cfg->redist_bgp_exterior_view; |
65efcfce | 2812 | |
d62a17ae | 2813 | if (bgp->rfapi_cfg->redist[afi][ZEBRA_ROUTE_BGP_DIRECT_EXT]) { |
2814 | vnc_zlog_debug_verbose( | |
2815 | "%s: already enabled for afi %d, skipping", __func__, | |
2816 | afi); | |
2817 | return; | |
2818 | } | |
2819 | bgp->rfapi_cfg->redist[afi][ZEBRA_ROUTE_BGP_DIRECT_EXT] = 1; | |
65efcfce | 2820 | |
d62a17ae | 2821 | if (!bgp_exterior) { |
2822 | vnc_zlog_debug_verbose( | |
2823 | "%s: no exterior view set yet, no routes to import yet", | |
2824 | __func__); | |
2825 | return; | |
2826 | } | |
65efcfce | 2827 | |
d62a17ae | 2828 | for (rn = bgp_table_top(bgp_exterior->rib[afi][SAFI_UNICAST]); rn; |
2829 | rn = bgp_route_next(rn)) { | |
65efcfce | 2830 | |
d62a17ae | 2831 | struct bgp_info *bi; |
65efcfce | 2832 | |
d62a17ae | 2833 | for (bi = rn->info; bi; bi = bi->next) { |
65efcfce | 2834 | |
d62a17ae | 2835 | if (CHECK_FLAG(bi->flags, BGP_INFO_REMOVED)) |
2836 | continue; | |
65efcfce | 2837 | |
d62a17ae | 2838 | vnc_import_bgp_exterior_add_route(bgp_exterior, &rn->p, |
2839 | bi); | |
2840 | } | |
2841 | } | |
2842 | vnc_zlog_debug_verbose( | |
2843 | "%s: set redist[afi=%d][type=%d=ZEBRA_ROUTE_BGP_DIRECT] return", | |
2844 | __func__, afi, ZEBRA_ROUTE_BGP_DIRECT); | |
65efcfce LB |
2845 | } |
2846 | ||
2847 | /* | |
2848 | * This function is for populating a newly-created Import Table | |
2849 | */ | |
d62a17ae | 2850 | void vnc_import_bgp_exterior_redist_enable_it( |
2851 | struct bgp *bgp, afi_t afi, struct rfapi_import_table *it_only) | |
65efcfce | 2852 | { |
d62a17ae | 2853 | struct bgp *bgp_exterior; |
2854 | struct bgp_node *rn; | |
65efcfce | 2855 | |
d62a17ae | 2856 | vnc_zlog_debug_verbose("%s: entry", __func__); |
65efcfce | 2857 | |
d62a17ae | 2858 | bgp_exterior = bgp->rfapi_cfg->redist_bgp_exterior_view; |
65efcfce | 2859 | |
d62a17ae | 2860 | if (!bgp->rfapi_cfg->redist[afi][ZEBRA_ROUTE_BGP_DIRECT_EXT]) { |
2861 | vnc_zlog_debug_verbose("%s: not enabled for afi %d, skipping", | |
2862 | __func__, afi); | |
2863 | return; | |
2864 | } | |
65efcfce | 2865 | |
d62a17ae | 2866 | if (!bgp_exterior) { |
2867 | vnc_zlog_debug_verbose( | |
2868 | "%s: no exterior view set yet, no routes to import yet", | |
2869 | __func__); | |
2870 | return; | |
2871 | } | |
65efcfce | 2872 | |
d62a17ae | 2873 | for (rn = bgp_table_top(bgp_exterior->rib[afi][SAFI_UNICAST]); rn; |
2874 | rn = bgp_route_next(rn)) { | |
65efcfce | 2875 | |
d62a17ae | 2876 | struct bgp_info *bi; |
65efcfce | 2877 | |
d62a17ae | 2878 | for (bi = rn->info; bi; bi = bi->next) { |
65efcfce | 2879 | |
d62a17ae | 2880 | if (CHECK_FLAG(bi->flags, BGP_INFO_REMOVED)) |
2881 | continue; | |
65efcfce | 2882 | |
d62a17ae | 2883 | vnc_import_bgp_exterior_add_route_it( |
2884 | bgp_exterior, &rn->p, bi, it_only); | |
2885 | } | |
2886 | } | |
65efcfce LB |
2887 | } |
2888 | ||
2889 | ||
d62a17ae | 2890 | void vnc_import_bgp_redist_disable(struct bgp *bgp, afi_t afi) |
65efcfce | 2891 | { |
d62a17ae | 2892 | /* |
2893 | * iterate over vpn routes, find routes of type ZEBRA_ROUTE_BGP_DIRECT, | |
2894 | * delete (call timer expire immediately) | |
2895 | */ | |
2896 | struct bgp_node *rn1; | |
2897 | struct bgp_node *rn2; | |
2898 | ||
2899 | vnc_zlog_debug_verbose("%s: entry", __func__); | |
2900 | ||
2901 | if (!bgp->rfapi_cfg->redist[afi][ZEBRA_ROUTE_BGP_DIRECT]) { | |
2902 | vnc_zlog_debug_verbose( | |
2903 | "%s: already disabled for afi %d, skipping", __func__, | |
2904 | afi); | |
2905 | return; | |
2906 | } | |
2907 | ||
2908 | /* | |
2909 | * Two-level table for SAFI_MPLS_VPN | |
2910 | * Be careful when changing the things we iterate over | |
2911 | */ | |
2912 | for (rn1 = bgp_table_top(bgp->rib[afi][SAFI_MPLS_VPN]); rn1; | |
2913 | rn1 = bgp_route_next(rn1)) { | |
2914 | ||
2915 | if (rn1->info) { | |
2916 | for (rn2 = bgp_table_top(rn1->info); rn2; | |
2917 | rn2 = bgp_route_next(rn2)) { | |
2918 | ||
2919 | struct bgp_info *bi; | |
2920 | struct bgp_info *nextbi; | |
2921 | ||
2922 | for (bi = rn2->info; bi; bi = nextbi) { | |
2923 | ||
2924 | nextbi = bi->next; | |
2925 | ||
2926 | if (bi->type | |
2927 | == ZEBRA_ROUTE_BGP_DIRECT) { | |
2928 | ||
2929 | struct rfapi_descriptor *rfd; | |
2930 | vncHDBgpDirect.peer = bi->peer; | |
2931 | ||
2932 | rfd = bi->extra->vnc.export | |
2933 | .rfapi_handle; | |
2934 | ||
2935 | vnc_zlog_debug_verbose( | |
2936 | "%s: deleting bi=%p, bi->peer=%p, bi->type=%d, bi->sub_type=%d, bi->extra->vnc.export.rfapi_handle=%p [passing rfd=%p]", | |
2937 | __func__, bi, bi->peer, | |
2938 | bi->type, bi->sub_type, | |
2939 | (bi->extra | |
2940 | ? bi->extra | |
2941 | ->vnc | |
2942 | .export | |
2943 | .rfapi_handle | |
2944 | : NULL), | |
2945 | rfd); | |
2946 | ||
2947 | ||
2948 | del_vnc_route( | |
2949 | rfd, bi->peer, bgp, | |
2950 | SAFI_MPLS_VPN, &rn2->p, | |
2951 | (struct prefix_rd *)&rn1 | |
2952 | ->p, | |
2953 | bi->type, bi->sub_type, | |
2954 | NULL, 1); /* kill */ | |
2955 | ||
2956 | vncHDBgpDirect.peer = NULL; | |
2957 | } | |
2958 | } | |
2959 | } | |
2960 | } | |
2961 | } | |
2962 | /* Clear RHN list */ | |
2963 | if (bgp->rfapi->resolve_nve_nexthop) { | |
2964 | struct prefix_bag *pb; | |
2965 | struct bgp_info *info; | |
2966 | while (!skiplist_first(bgp->rfapi->resolve_nve_nexthop, NULL, | |
2967 | (void *)&pb)) { | |
2968 | info = pb->ubi; | |
2969 | skiplist_delete_first(bgp->rfapi->resolve_nve_nexthop); | |
2970 | bgp_info_unlock(info); | |
2971 | } | |
2972 | } | |
2973 | ||
2974 | bgp->rfapi_cfg->redist[afi][ZEBRA_ROUTE_BGP_DIRECT] = 0; | |
2975 | vnc_zlog_debug_verbose("%s: return", __func__); | |
65efcfce LB |
2976 | } |
2977 | ||
2978 | ||
d62a17ae | 2979 | void vnc_import_bgp_exterior_redist_disable(struct bgp *bgp, afi_t afi) |
65efcfce | 2980 | { |
d62a17ae | 2981 | struct rfapi_cfg *hc = bgp->rfapi_cfg; |
2982 | struct bgp *bgp_exterior = hc->redist_bgp_exterior_view; | |
65efcfce | 2983 | |
d62a17ae | 2984 | vnc_zlog_debug_verbose("%s: entry", __func__); |
65efcfce | 2985 | |
d62a17ae | 2986 | if (!hc->redist[afi][ZEBRA_ROUTE_BGP_DIRECT_EXT]) { |
2987 | vnc_zlog_debug_verbose( | |
2988 | "%s: already disabled for afi %d, skipping", __func__, | |
2989 | afi); | |
2990 | return; | |
2991 | } | |
65efcfce | 2992 | |
d62a17ae | 2993 | if (!bgp_exterior) { |
2994 | vnc_zlog_debug_verbose( | |
2995 | "%s: bgp exterior view not defined, skipping", | |
2996 | __func__); | |
2997 | return; | |
2998 | } | |
65efcfce LB |
2999 | |
3000 | ||
d62a17ae | 3001 | { |
3002 | struct bgp_node *rn; | |
3003 | for (rn = bgp_table_top(bgp_exterior->rib[afi][SAFI_UNICAST]); | |
3004 | rn; rn = bgp_route_next(rn)) { | |
65efcfce | 3005 | |
d62a17ae | 3006 | struct bgp_info *bi; |
65efcfce | 3007 | |
d62a17ae | 3008 | for (bi = rn->info; bi; bi = bi->next) { |
65efcfce | 3009 | |
d62a17ae | 3010 | if (CHECK_FLAG(bi->flags, BGP_INFO_REMOVED)) |
3011 | continue; | |
65efcfce | 3012 | |
d62a17ae | 3013 | vnc_import_bgp_exterior_del_route(bgp_exterior, |
3014 | &rn->p, bi); | |
3015 | } | |
3016 | } | |
65efcfce | 3017 | #if DEBUG_RHN_LIST |
d62a17ae | 3018 | print_rhn_list(__func__, NULL); |
65efcfce | 3019 | #endif |
d62a17ae | 3020 | } |
65efcfce | 3021 | |
d62a17ae | 3022 | bgp->rfapi_cfg->redist[afi][ZEBRA_ROUTE_BGP_DIRECT_EXT] = 0; |
3023 | vnc_zlog_debug_verbose("%s: return", __func__); | |
65efcfce | 3024 | } |