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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]) { | |
872ed4c7 DS |
208 | char kbuf[PREFIX_STRLEN]; |
209 | char hbuf[PREFIX_STRLEN]; | |
210 | char ubuf[PREFIX_STRLEN]; | |
d62a17ae | 211 | |
212 | pb = p->value; | |
213 | ||
872ed4c7 DS |
214 | prefix2str(p->key, kbuf, sizeof(kbuf)); |
215 | prefix2str(&pb->hpfx, hbuf, sizeof(hbuf)); | |
216 | prefix2str(&pb->upfx, ubuf, sizeof(ubuf)); | |
d62a17ae | 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)) { | |
872ed4c7 DS |
262 | char str_onh[PREFIX_STRLEN]; |
263 | char str_nve_pfx[PREFIX_STRLEN]; | |
d62a17ae | 264 | |
872ed4c7 DS |
265 | prefix2str(&pfx_orig_nexthop, str_onh, sizeof(str_onh)); |
266 | prefix2str(&pb->hpfx, str_nve_pfx, sizeof(str_nve_pfx)); | |
d62a17ae | 267 | |
268 | vnc_zlog_debug_verbose( | |
269 | "%s: %s: FATAL: resolve_nve_nexthop list item bi nexthop %s != nve pfx %s", | |
270 | __func__, tag, str_onh, str_nve_pfx); | |
271 | assert(0); | |
272 | } | |
273 | } | |
274 | vnc_zlog_debug_verbose("%s: vnc_rhnck OK", tag); | |
65efcfce LB |
275 | } |
276 | ||
277 | #define VNC_RHNCK(n) do {char buf[BUFSIZ];sprintf(buf,"%s: %s", __func__, #n);vnc_rhnck(buf);} while (0) | |
278 | ||
279 | #else | |
280 | ||
281 | #define VNC_RHNCK(n) | |
282 | ||
283 | #endif | |
284 | ||
285 | /*********************************************************************** | |
286 | * Add/Delete Unicast Route | |
287 | ***********************************************************************/ | |
288 | ||
289 | /* | |
290 | * "Adding a Route" import process | |
291 | */ | |
292 | ||
293 | /* | |
294 | * extract and package information from the BGP unicast route. | |
295 | * Return code 0 means OK, non-0 means drop. | |
296 | * | |
297 | * If return code is 0, caller MUST release ecom | |
298 | */ | |
d62a17ae | 299 | static int process_unicast_route(struct bgp *bgp, /* in */ |
300 | afi_t afi, /* in */ | |
301 | struct prefix *prefix, /* in */ | |
302 | struct bgp_info *info, /* in */ | |
303 | struct ecommunity **ecom, /* OUT */ | |
304 | struct prefix *unicast_nexthop) /* OUT */ | |
65efcfce | 305 | { |
d62a17ae | 306 | struct rfapi_cfg *hc = bgp->rfapi_cfg; |
307 | struct peer *peer = info->peer; | |
308 | struct attr *attr = info->attr; | |
309 | struct attr hattr; | |
310 | struct route_map *rmap = NULL; | |
311 | struct prefix pfx_orig_nexthop; | |
312 | ||
313 | memset(&pfx_orig_nexthop, 0, | |
314 | sizeof(struct prefix)); /* keep valgrind happy */ | |
315 | ||
316 | /* | |
317 | * prefix list check | |
318 | */ | |
319 | if (hc->plist_redist[ZEBRA_ROUTE_BGP_DIRECT][afi]) { | |
320 | vnc_zlog_debug_verbose("%s: HC prefix list is set, checking", | |
321 | __func__); | |
322 | if (prefix_list_apply( | |
323 | hc->plist_redist[ZEBRA_ROUTE_BGP_DIRECT][afi], | |
324 | prefix) | |
325 | == PREFIX_DENY) { | |
326 | vnc_zlog_debug_verbose( | |
327 | "%s: prefix list returns DENY, blocking route", | |
328 | __func__); | |
329 | return -1; | |
330 | } | |
331 | vnc_zlog_debug_verbose( | |
332 | "%s: prefix list returns PASS, allowing route", | |
333 | __func__); | |
334 | } | |
335 | ||
336 | /* apply routemap, if any, later */ | |
337 | rmap = hc->routemap_redist[ZEBRA_ROUTE_BGP_DIRECT]; | |
338 | ||
339 | /* | |
340 | * Extract original nexthop, which we expect to be a NVE connected | |
341 | * router | |
342 | * Note that this is the nexthop before any possible application of | |
343 | * policy | |
344 | */ | |
345 | /* | |
346 | * Incoming prefix is unicast. If v6, it is in multiprotocol area, | |
347 | * but if v4 it is in attr->nexthop | |
348 | */ | |
349 | rfapiUnicastNexthop2Prefix(afi, attr, &pfx_orig_nexthop); | |
350 | ||
351 | /* | |
352 | * route map handling | |
353 | * This code is here because it allocates an interned attr which | |
354 | * must be freed before we return. It's easier to put it after | |
355 | * all of the possible returns above. | |
356 | */ | |
357 | memset(&hattr, 0, sizeof(struct attr)); | |
358 | bgp_attr_dup(&hattr, attr); /* hattr becomes a ghost attr */ | |
359 | ||
360 | if (rmap) { | |
361 | struct bgp_info info; | |
362 | route_map_result_t ret; | |
363 | ||
364 | memset(&info, 0, sizeof(info)); | |
365 | info.peer = peer; | |
366 | info.attr = &hattr; | |
367 | ret = route_map_apply(rmap, prefix, RMAP_BGP, &info); | |
368 | if (ret == RMAP_DENYMATCH) { | |
369 | bgp_attr_flush(&hattr); | |
370 | vnc_zlog_debug_verbose( | |
371 | "%s: route map \"%s\" says DENY, returning", | |
372 | __func__, rmap->name); | |
373 | return -1; | |
374 | } | |
375 | } | |
376 | ||
377 | /* | |
378 | * Get the (possibly altered by policy) unicast nexthop | |
379 | * for later lookup in the Import Table by caller | |
380 | */ | |
381 | rfapiUnicastNexthop2Prefix(afi, &hattr, unicast_nexthop); | |
382 | ||
383 | if (hattr.ecommunity) | |
384 | *ecom = ecommunity_dup(hattr.ecommunity); | |
385 | else | |
386 | *ecom = ecommunity_new(); | |
387 | ||
388 | /* | |
389 | * Done with hattr, clean up | |
390 | */ | |
391 | bgp_attr_flush(&hattr); | |
392 | ||
393 | /* | |
394 | * Add EC that carries original NH of iBGP route (2 bytes = magic | |
395 | * value indicating it came from an VNC gateway; default 5226, but | |
396 | * must be user configurable). Note that this is the nexthop before | |
397 | * any application of policy. | |
398 | */ | |
399 | { | |
400 | struct ecommunity_val vnc_gateway_magic; | |
401 | uint16_t localadmin; | |
402 | ||
403 | /* Using route origin extended community type */ | |
404 | memset(&vnc_gateway_magic, 0, sizeof(vnc_gateway_magic)); | |
405 | vnc_gateway_magic.val[0] = 0x01; | |
406 | vnc_gateway_magic.val[1] = 0x03; | |
407 | ||
408 | /* Only works for IPv4 nexthops */ | |
409 | if (prefix->family == AF_INET) { | |
410 | memcpy(vnc_gateway_magic.val + 2, | |
411 | &unicast_nexthop->u.prefix4, 4); | |
412 | } | |
413 | localadmin = htons(hc->resolve_nve_roo_local_admin); | |
414 | memcpy(vnc_gateway_magic.val + 6, (char *)&localadmin, 2); | |
415 | ||
416 | ecommunity_add_val(*ecom, &vnc_gateway_magic); | |
417 | } | |
418 | ||
419 | return 0; | |
65efcfce LB |
420 | } |
421 | ||
422 | ||
d62a17ae | 423 | static void vnc_import_bgp_add_route_mode_resolve_nve_one_bi( |
424 | struct bgp *bgp, afi_t afi, struct bgp_info *bi, /* VPN bi */ | |
425 | struct prefix_rd *prd, /* RD */ | |
426 | struct prefix *prefix, /* unicast route prefix */ | |
427 | uint32_t *local_pref, /* NULL = no local_pref */ | |
428 | uint32_t *med, /* NULL = no med */ | |
429 | struct ecommunity *ecom) /* generated ecoms */ | |
65efcfce | 430 | { |
d62a17ae | 431 | struct prefix un; |
432 | struct prefix nexthop; | |
433 | struct rfapi_ip_addr nexthop_h; | |
434 | uint32_t lifetime; | |
435 | uint32_t *plifetime; | |
436 | struct bgp_attr_encap_subtlv *encaptlvs; | |
437 | uint32_t label = 0; | |
438 | ||
439 | struct rfapi_un_option optary[3]; | |
440 | struct rfapi_un_option *opt = NULL; | |
441 | int cur_opt = 0; | |
65efcfce | 442 | |
d62a17ae | 443 | vnc_zlog_debug_verbose("%s: entry", __func__); |
444 | ||
445 | if (bi->type != ZEBRA_ROUTE_BGP && bi->type != ZEBRA_ROUTE_BGP_DIRECT) { | |
446 | ||
447 | return; | |
448 | } | |
449 | if (bi->sub_type != BGP_ROUTE_NORMAL && bi->sub_type != BGP_ROUTE_STATIC | |
450 | && bi->sub_type != BGP_ROUTE_RFP) { | |
451 | ||
452 | return; | |
453 | } | |
454 | if (CHECK_FLAG(bi->flags, BGP_INFO_REMOVED)) | |
455 | return; | |
456 | ||
457 | vncHDResolveNve.peer = bi->peer; | |
458 | if (!rfapiGetVncTunnelUnAddr(bi->attr, &un)) { | |
459 | if (rfapiQprefix2Raddr(&un, &vncHDResolveNve.un_addr)) | |
460 | return; | |
461 | } else { | |
462 | memset(&vncHDResolveNve.un_addr, 0, | |
463 | sizeof(vncHDResolveNve.un_addr)); | |
464 | } | |
465 | ||
466 | /* Use nexthop of VPN route as nexthop of constructed route */ | |
467 | rfapiNexthop2Prefix(bi->attr, &nexthop); | |
468 | rfapiQprefix2Raddr(&nexthop, &nexthop_h); | |
469 | ||
470 | if (rfapiGetVncLifetime(bi->attr, &lifetime)) { | |
471 | plifetime = NULL; | |
472 | } else { | |
473 | plifetime = &lifetime; | |
474 | } | |
475 | ||
476 | if (bi->attr) { | |
477 | encaptlvs = bi->attr->vnc_subtlvs; | |
478 | if (bi->attr->encap_tunneltype != BGP_ENCAP_TYPE_RESERVED | |
479 | && bi->attr->encap_tunneltype != BGP_ENCAP_TYPE_MPLS) { | |
480 | if (opt != NULL) | |
481 | opt->next = &optary[cur_opt]; | |
482 | opt = &optary[cur_opt++]; | |
483 | memset(opt, 0, sizeof(struct rfapi_un_option)); | |
484 | opt->type = RFAPI_UN_OPTION_TYPE_TUNNELTYPE; | |
485 | opt->v.tunnel.type = bi->attr->encap_tunneltype; | |
486 | /* TBD parse bi->attr->extra->encap_subtlvs */ | |
487 | } | |
488 | } else { | |
489 | encaptlvs = NULL; | |
490 | } | |
491 | ||
492 | struct ecommunity *new_ecom = ecommunity_dup(ecom); | |
493 | ||
494 | if (bi->attr && bi->attr->ecommunity) | |
495 | ecommunity_merge(new_ecom, bi->attr->ecommunity); | |
496 | ||
497 | if (bi->extra) | |
498 | label = decode_label(&bi->extra->label); | |
499 | ||
500 | add_vnc_route(&vncHDResolveNve, bgp, SAFI_MPLS_VPN, | |
501 | prefix, /* unicast route prefix */ | |
502 | prd, &nexthop_h, /* new nexthop */ | |
503 | local_pref, plifetime, | |
504 | (struct bgp_tea_options *)encaptlvs, /* RFP options */ | |
505 | opt, NULL, new_ecom, med, /* NULL => don't set med */ | |
506 | (label ? &label : NULL), /* NULL= default */ | |
507 | ZEBRA_ROUTE_BGP_DIRECT, BGP_ROUTE_REDISTRIBUTE, | |
508 | RFAPI_AHR_RFPOPT_IS_VNCTLV); /* flags */ | |
509 | ||
510 | ecommunity_free(&new_ecom); | |
65efcfce LB |
511 | } |
512 | ||
d62a17ae | 513 | static void vnc_import_bgp_add_route_mode_resolve_nve_one_rd( |
514 | struct prefix_rd *prd, /* RD */ | |
515 | struct bgp_table *table_rd, /* per-rd VPN route table */ | |
516 | afi_t afi, struct bgp *bgp, struct prefix *prefix, /* unicast prefix */ | |
517 | struct ecommunity *ecom, /* generated ecoms */ | |
518 | uint32_t *local_pref, /* NULL = no local_pref */ | |
519 | uint32_t *med, /* NULL = no med */ | |
520 | struct prefix *ubi_nexthop) /* unicast nexthop */ | |
65efcfce | 521 | { |
d62a17ae | 522 | struct bgp_node *bn; |
523 | struct bgp_info *bi; | |
65efcfce | 524 | |
d62a17ae | 525 | if (!table_rd) |
526 | return; | |
65efcfce | 527 | |
d62a17ae | 528 | { |
872ed4c7 | 529 | char str_nh[PREFIX_STRLEN]; |
65efcfce | 530 | |
872ed4c7 | 531 | prefix2str(ubi_nexthop, str_nh, sizeof(str_nh)); |
65efcfce | 532 | |
d62a17ae | 533 | vnc_zlog_debug_verbose("%s: ubi_nexthop=%s", __func__, str_nh); |
534 | } | |
65efcfce | 535 | |
d62a17ae | 536 | /* exact match */ |
537 | bn = bgp_node_lookup(table_rd, ubi_nexthop); | |
538 | if (!bn) { | |
539 | vnc_zlog_debug_verbose( | |
540 | "%s: no match in RD's table for ubi_nexthop", __func__); | |
541 | return; | |
542 | } | |
65efcfce | 543 | |
d62a17ae | 544 | /* Iterate over bgp_info items at this node */ |
545 | for (bi = bn->info; bi; bi = bi->next) { | |
65efcfce | 546 | |
d62a17ae | 547 | vnc_import_bgp_add_route_mode_resolve_nve_one_bi( |
548 | bgp, afi, bi, /* VPN bi */ | |
549 | prd, prefix, local_pref, med, ecom); | |
550 | } | |
65efcfce | 551 | |
d62a17ae | 552 | bgp_unlock_node(bn); |
65efcfce LB |
553 | } |
554 | ||
d62a17ae | 555 | static void vnc_import_bgp_add_route_mode_resolve_nve( |
556 | struct bgp *bgp, struct prefix *prefix, /* unicast prefix */ | |
557 | struct bgp_info *info) /* unicast info */ | |
65efcfce | 558 | { |
d62a17ae | 559 | afi_t afi = family2afi(prefix->family); |
560 | struct rfapi_cfg *hc = NULL; | |
561 | ||
562 | struct prefix pfx_unicast_nexthop = {0}; /* happy valgrind */ | |
563 | ||
564 | struct ecommunity *ecom = NULL; | |
565 | uint32_t local_pref; | |
566 | uint32_t *med = NULL; | |
567 | ||
568 | struct prefix_bag *pb; | |
569 | struct bgp_node *bnp; /* prd table node */ | |
570 | ||
571 | /*debugging */ | |
7f88f54a | 572 | if (VNC_DEBUG(VERBOSE)) { |
872ed4c7 DS |
573 | char str_pfx[PREFIX_STRLEN]; |
574 | char str_nh[PREFIX_STRLEN]; | |
d62a17ae | 575 | struct prefix nh; |
576 | ||
872ed4c7 | 577 | prefix2str(prefix, str_pfx, sizeof(str_pfx)); |
d62a17ae | 578 | |
579 | nh.prefixlen = 0; | |
580 | rfapiUnicastNexthop2Prefix(afi, info->attr, &nh); | |
581 | if (nh.prefixlen) { | |
872ed4c7 | 582 | prefix2str(&nh, str_nh, sizeof(str_nh)); |
d62a17ae | 583 | } else { |
584 | str_nh[0] = '?'; | |
585 | str_nh[1] = 0; | |
586 | } | |
587 | ||
588 | vnc_zlog_debug_verbose( | |
589 | "%s(bgp=%p, unicast prefix=%s, unicast nh=%s)", | |
590 | __func__, bgp, str_pfx, str_nh); | |
591 | } | |
592 | ||
593 | if (info->type != ZEBRA_ROUTE_BGP) { | |
594 | vnc_zlog_debug_verbose( | |
595 | "%s: unicast type %d=\"%s\" is not %d=%s, skipping", | |
596 | __func__, info->type, zebra_route_string(info->type), | |
597 | ZEBRA_ROUTE_BGP, "ZEBRA_ROUTE_BGP"); | |
598 | return; | |
599 | } | |
600 | ||
601 | /* | |
602 | * Preliminary checks | |
603 | */ | |
604 | ||
605 | if (!afi) { | |
606 | zlog_err("%s: can't get afi of prefix", __func__); | |
607 | return; | |
608 | } | |
609 | ||
610 | if (!(hc = bgp->rfapi_cfg)) { | |
611 | vnc_zlog_debug_verbose("%s: bgp->rfapi_cfg is NULL, skipping", | |
612 | __func__); | |
613 | return; | |
614 | } | |
615 | ||
616 | /* check vnc redist flag for bgp direct routes */ | |
617 | if (!bgp->rfapi_cfg->redist[afi][ZEBRA_ROUTE_BGP_DIRECT]) { | |
618 | vnc_zlog_debug_verbose( | |
619 | "%s: bgp->rfapi_cfg->redist[afi=%d][type=ZEBRA_ROUTE_BGP_DIRECT] is 0, skipping", | |
620 | __func__, afi); | |
621 | return; | |
622 | } | |
623 | ||
624 | ||
625 | if (process_unicast_route(bgp, afi, prefix, info, &ecom, | |
626 | &pfx_unicast_nexthop)) { | |
627 | ||
628 | vnc_zlog_debug_verbose( | |
629 | "%s: process_unicast_route error, skipping", __func__); | |
630 | return; | |
631 | } | |
632 | ||
633 | local_pref = calc_local_pref(info->attr, info->peer); | |
634 | if (info->attr | |
635 | && (info->attr->flag & ATTR_FLAG_BIT(BGP_ATTR_MULTI_EXIT_DISC))) { | |
636 | ||
637 | med = &info->attr->med; | |
638 | } | |
639 | ||
640 | ||
641 | /* | |
642 | * At this point, we have allocated: | |
643 | * | |
644 | * ecom ecommunity ptr, union of unicast and ROO parts (no NVE part) | |
645 | * | |
646 | * And we have set: | |
647 | * | |
648 | * pfx_unicast_nexthop nexthop of uncast route | |
649 | */ | |
650 | ||
651 | if (!bgp->rfapi->resolve_nve_nexthop) { | |
652 | bgp->rfapi->resolve_nve_nexthop = | |
653 | skiplist_new(SKIPLIST_FLAG_ALLOW_DUPLICATES, | |
654 | vnc_prefix_cmp, prefix_bag_free); | |
655 | } | |
656 | ||
657 | pb = XCALLOC(MTYPE_RFAPI_PREFIX_BAG, sizeof(struct prefix_bag)); | |
658 | pb->hpfx = pfx_unicast_nexthop; | |
659 | pb->ubi = info; | |
660 | pb->upfx = *prefix; | |
661 | ||
662 | bgp_info_lock(info); /* skiplist refers to it */ | |
663 | skiplist_insert(bgp->rfapi->resolve_nve_nexthop, &pb->hpfx, pb); | |
664 | ||
665 | /* | |
666 | * Iterate over RDs in VPN RIB. For each RD, look up unicast nexthop | |
667 | * (exact match, /32). If an exact match is found, call add_vnc_route. | |
668 | */ | |
669 | ||
670 | for (bnp = bgp_table_top(bgp->rib[afi][SAFI_MPLS_VPN]); bnp; | |
671 | bnp = bgp_route_next(bnp)) { | |
672 | ||
673 | struct bgp_table *table; | |
674 | ||
675 | table = (struct bgp_table *)(bnp->info); | |
676 | ||
677 | if (!table) | |
678 | continue; | |
679 | ||
680 | vnc_import_bgp_add_route_mode_resolve_nve_one_rd( | |
681 | (struct prefix_rd *)&bnp->p, table, afi, bgp, prefix, | |
682 | ecom, &local_pref, med, &pfx_unicast_nexthop); | |
683 | } | |
684 | ||
685 | ||
686 | if (ecom) | |
687 | ecommunity_free(&ecom); | |
688 | ||
689 | vnc_zlog_debug_verbose("%s: done", __func__); | |
65efcfce LB |
690 | } |
691 | ||
692 | ||
d62a17ae | 693 | static void vnc_import_bgp_add_route_mode_plain(struct bgp *bgp, |
694 | struct prefix *prefix, | |
695 | struct bgp_info *info) | |
65efcfce | 696 | { |
d62a17ae | 697 | afi_t afi = family2afi(prefix->family); |
698 | struct peer *peer = info->peer; | |
699 | struct attr *attr = info->attr; | |
700 | struct attr hattr; | |
701 | struct rfapi_cfg *hc = NULL; | |
702 | struct attr *iattr = NULL; | |
703 | ||
704 | struct rfapi_ip_addr vnaddr; | |
705 | struct prefix vn_pfx_space; | |
706 | struct prefix *vn_pfx = NULL; | |
707 | int ahr_flags = 0; | |
708 | struct ecommunity *ecom = NULL; | |
709 | struct prefix_rd prd; | |
710 | struct route_map *rmap = NULL; | |
711 | uint32_t local_pref; | |
712 | uint32_t *med = NULL; | |
713 | ||
714 | { | |
872ed4c7 | 715 | char buf[PREFIX_STRLEN]; |
d62a17ae | 716 | |
872ed4c7 | 717 | prefix2str(prefix, buf, sizeof(buf)); |
d62a17ae | 718 | vnc_zlog_debug_verbose("%s(prefix=%s) entry", __func__, buf); |
719 | } | |
720 | ||
721 | if (!afi) { | |
722 | zlog_err("%s: can't get afi of prefix", __func__); | |
723 | return; | |
724 | } | |
725 | ||
726 | if (!(hc = bgp->rfapi_cfg)) { | |
727 | vnc_zlog_debug_verbose("%s: bgp->rfapi_cfg is NULL, skipping", | |
728 | __func__); | |
729 | return; | |
730 | } | |
731 | ||
732 | /* check vnc redist flag for bgp direct routes */ | |
733 | if (!bgp->rfapi_cfg->redist[afi][ZEBRA_ROUTE_BGP_DIRECT]) { | |
734 | vnc_zlog_debug_verbose( | |
735 | "%s: bgp->rfapi_cfg->redist[afi=%d][type=ZEBRA_ROUTE_BGP_DIRECT] is 0, skipping", | |
736 | __func__, afi); | |
737 | return; | |
738 | } | |
739 | ||
740 | /* | |
741 | * mode "plain" specific code | |
742 | */ | |
743 | { | |
744 | vnc_zlog_debug_verbose("%s: NOT using redist RFG", __func__); | |
745 | ||
746 | /* | |
747 | * prefix list check | |
748 | */ | |
749 | if (hc->plist_redist[ZEBRA_ROUTE_BGP_DIRECT][afi]) { | |
750 | vnc_zlog_debug_verbose( | |
751 | "%s: HC prefix list is set, checking", | |
752 | __func__); | |
753 | if (prefix_list_apply( | |
754 | hc->plist_redist[ZEBRA_ROUTE_BGP_DIRECT] | |
755 | [afi], | |
756 | prefix) | |
757 | == PREFIX_DENY) { | |
758 | vnc_zlog_debug_verbose( | |
759 | "%s: prefix list returns DENY, blocking route", | |
760 | __func__); | |
761 | return; | |
762 | } | |
763 | vnc_zlog_debug_verbose( | |
764 | "%s: prefix list returns PASS, allowing route", | |
765 | __func__); | |
766 | } | |
767 | ||
768 | /* apply routemap, if any, later */ | |
769 | rmap = hc->routemap_redist[ZEBRA_ROUTE_BGP_DIRECT]; | |
770 | ||
771 | /* | |
772 | * Incoming prefix is unicast. If v6, it is in multiprotocol | |
773 | * area, | |
774 | * but if v4 it is in attr->nexthop | |
775 | */ | |
776 | rfapiUnicastNexthop2Prefix(afi, attr, &vn_pfx_space); | |
777 | vn_pfx = &vn_pfx_space; | |
778 | ||
779 | /* UN address */ | |
780 | ahr_flags |= RFAPI_AHR_NO_TUNNEL_SUBTLV; | |
781 | } | |
782 | ||
783 | if (VNC_DEBUG(IMPORT_BGP_ADD_ROUTE)) { | |
872ed4c7 | 784 | char buf[PREFIX_STRLEN]; |
d62a17ae | 785 | |
872ed4c7 | 786 | prefix2str(vn_pfx, buf, sizeof(buf)); |
d62a17ae | 787 | vnc_zlog_debug_any("%s vn_pfx=%s", __func__, buf); |
788 | } | |
789 | ||
790 | /* | |
791 | * Compute VN address | |
792 | */ | |
793 | if (rfapiQprefix2Raddr(vn_pfx, &vnaddr)) { | |
794 | vnc_zlog_debug_verbose("%s: redist VN invalid, skipping", | |
795 | __func__); | |
796 | return; | |
797 | } | |
798 | ||
799 | /* | |
800 | * route map handling | |
801 | * This code is here because it allocates an interned attr which | |
802 | * must be freed before we return. It's easier to put it after | |
803 | * all of the possible returns above. | |
804 | */ | |
805 | memset(&hattr, 0, sizeof(struct attr)); | |
806 | bgp_attr_dup(&hattr, attr); /* hattr becomes a ghost attr */ | |
807 | ||
808 | if (rmap) { | |
809 | struct bgp_info info; | |
810 | route_map_result_t ret; | |
811 | ||
812 | memset(&info, 0, sizeof(info)); | |
813 | info.peer = peer; | |
814 | info.attr = &hattr; | |
815 | ret = route_map_apply(rmap, prefix, RMAP_BGP, &info); | |
816 | if (ret == RMAP_DENYMATCH) { | |
817 | bgp_attr_flush(&hattr); | |
818 | vnc_zlog_debug_verbose( | |
819 | "%s: route map \"%s\" says DENY, returning", | |
820 | __func__, rmap->name); | |
821 | return; | |
822 | } | |
823 | } | |
824 | ||
825 | iattr = bgp_attr_intern(&hattr); | |
826 | bgp_attr_flush(&hattr); | |
827 | ||
828 | /* Now iattr is an allocated interned attr */ | |
829 | ||
830 | /* | |
831 | * Mode "plain" specific code | |
832 | * | |
833 | * Sets RD in dummy HD | |
834 | * Allocates ecom | |
835 | */ | |
836 | { | |
837 | if (vnaddr.addr_family != AF_INET) { | |
838 | vnc_zlog_debug_verbose( | |
839 | "%s: can't auto-assign RD, VN AF (%d) is not IPv4, skipping", | |
840 | __func__, vnaddr.addr_family); | |
841 | if (iattr) { | |
842 | bgp_attr_unintern(&iattr); | |
843 | } | |
844 | return; | |
845 | } | |
846 | memset(&prd, 0, sizeof(prd)); | |
847 | rfapi_set_autord_from_vn(&prd, &vnaddr); | |
848 | ||
849 | if (iattr && iattr->ecommunity) | |
850 | ecom = ecommunity_dup(iattr->ecommunity); | |
851 | } | |
852 | ||
853 | local_pref = calc_local_pref(iattr, peer); | |
854 | ||
855 | if (iattr && (iattr->flag & ATTR_FLAG_BIT(BGP_ATTR_MULTI_EXIT_DISC))) { | |
856 | med = &iattr->med; | |
857 | } | |
858 | ||
859 | if (VNC_DEBUG(IMPORT_BGP_ADD_ROUTE)) { | |
872ed4c7 | 860 | char buf[PREFIX_STRLEN]; |
d62a17ae | 861 | |
872ed4c7 | 862 | rfapiRfapiIpAddr2Str(&vnaddr, buf, sizeof(buf)); |
d62a17ae | 863 | vnc_zlog_debug_any("%s: setting vnaddr to %s", __func__, buf); |
864 | } | |
865 | ||
866 | vncHDBgpDirect.peer = peer; | |
867 | add_vnc_route(&vncHDBgpDirect, bgp, SAFI_MPLS_VPN, prefix, &prd, | |
868 | &vnaddr, &local_pref, &(bgp->rfapi_cfg->redist_lifetime), | |
869 | NULL, /* RFP options */ | |
870 | NULL, NULL, ecom, med, /* med */ | |
871 | NULL, /* label: default */ | |
872 | ZEBRA_ROUTE_BGP_DIRECT, BGP_ROUTE_REDISTRIBUTE, | |
873 | ahr_flags); | |
874 | vncHDBgpDirect.peer = NULL; | |
875 | ||
876 | if (ecom) | |
877 | ecommunity_free(&ecom); | |
65efcfce LB |
878 | } |
879 | ||
880 | static void | |
d62a17ae | 881 | vnc_import_bgp_add_route_mode_nvegroup(struct bgp *bgp, struct prefix *prefix, |
882 | struct bgp_info *info, | |
883 | struct rfapi_nve_group_cfg *rfg) | |
65efcfce | 884 | { |
d62a17ae | 885 | afi_t afi = family2afi(prefix->family); |
886 | struct peer *peer = info->peer; | |
887 | struct attr *attr = info->attr; | |
888 | struct attr hattr; | |
889 | struct rfapi_cfg *hc = NULL; | |
890 | struct attr *iattr = NULL; | |
891 | ||
892 | struct rfapi_ip_addr vnaddr; | |
893 | struct prefix *vn_pfx = NULL; | |
894 | int ahr_flags = 0; | |
895 | struct ecommunity *ecom = NULL; | |
896 | struct prefix_rd prd; | |
897 | struct route_map *rmap = NULL; | |
898 | uint32_t local_pref; | |
899 | ||
900 | { | |
872ed4c7 | 901 | char buf[PREFIX_STRLEN]; |
d62a17ae | 902 | |
872ed4c7 | 903 | prefix2str(prefix, buf, sizeof(buf)); |
d62a17ae | 904 | vnc_zlog_debug_verbose("%s(prefix=%s) entry", __func__, buf); |
905 | } | |
906 | ||
907 | assert(rfg); | |
908 | ||
909 | if (!afi) { | |
910 | zlog_err("%s: can't get afi of prefix", __func__); | |
911 | return; | |
912 | } | |
913 | ||
914 | if (!(hc = bgp->rfapi_cfg)) { | |
915 | vnc_zlog_debug_verbose("%s: bgp->rfapi_cfg is NULL, skipping", | |
916 | __func__); | |
917 | return; | |
918 | } | |
919 | ||
920 | /* check vnc redist flag for bgp direct routes */ | |
921 | if (!bgp->rfapi_cfg->redist[afi][ZEBRA_ROUTE_BGP_DIRECT]) { | |
922 | vnc_zlog_debug_verbose( | |
923 | "%s: bgp->rfapi_cfg->redist[afi=%d][type=ZEBRA_ROUTE_BGP_DIRECT] is 0, skipping", | |
924 | __func__, afi); | |
925 | return; | |
926 | } | |
927 | ||
928 | ||
929 | /* | |
930 | * RFG-specific code | |
931 | */ | |
932 | { | |
933 | ||
934 | struct rfapi_ip_prefix pfx_un; | |
935 | ||
936 | vnc_zlog_debug_verbose("%s: using redist RFG", __func__); | |
937 | ||
938 | /* | |
939 | * RFG prefix list check | |
940 | */ | |
941 | if (rfg->plist_redist[ZEBRA_ROUTE_BGP_DIRECT][afi]) { | |
942 | vnc_zlog_debug_verbose( | |
943 | "%s: RFG prefix list is set, checking", | |
944 | __func__); | |
945 | if (prefix_list_apply( | |
946 | rfg->plist_redist[ZEBRA_ROUTE_BGP_DIRECT] | |
947 | [afi], | |
948 | prefix) | |
949 | == PREFIX_DENY) { | |
950 | vnc_zlog_debug_verbose( | |
951 | "%s: prefix list returns DENY, blocking route", | |
952 | __func__); | |
953 | return; | |
954 | } | |
955 | vnc_zlog_debug_verbose( | |
956 | "%s: prefix list returns PASS, allowing route", | |
957 | __func__); | |
958 | } | |
959 | ||
960 | /* apply routemap, if any, later */ | |
961 | rmap = rfg->routemap_redist[ZEBRA_ROUTE_BGP_DIRECT]; | |
962 | ||
963 | /* | |
964 | * export nve group's VN addr prefix must be a /32 which | |
965 | * will yield the VN addr to use | |
966 | */ | |
967 | vn_pfx = &rfg->vn_prefix; | |
968 | ||
969 | /* | |
970 | * UN Address | |
971 | */ | |
972 | if (!is_host_prefix(&rfg->un_prefix)) { | |
973 | /* NB prefixlen==0 means it has not been configured */ | |
974 | vnc_zlog_debug_verbose( | |
975 | "%s: redist RFG UN pfx not host pfx (plen=%d), skipping", | |
976 | __func__, rfg->un_prefix.prefixlen); | |
977 | return; | |
978 | } | |
979 | ||
980 | rfapiQprefix2Rprefix(&rfg->un_prefix, &pfx_un); | |
981 | ||
982 | vncHDBgpDirect.un_addr = pfx_un.prefix; | |
983 | } | |
984 | ||
985 | if (VNC_DEBUG(IMPORT_BGP_ADD_ROUTE)) { | |
872ed4c7 | 986 | char buf[PREFIX_STRLEN]; |
d62a17ae | 987 | |
872ed4c7 | 988 | prefix2str(vn_pfx, buf, sizeof(buf)); |
d62a17ae | 989 | vnc_zlog_debug_any("%s vn_pfx=%s", __func__, buf); |
990 | } | |
991 | ||
992 | /* | |
993 | * Compute VN address | |
994 | */ | |
995 | if (rfapiQprefix2Raddr(vn_pfx, &vnaddr)) { | |
996 | vnc_zlog_debug_verbose("%s: redist VN invalid, skipping", | |
997 | __func__); | |
998 | return; | |
999 | } | |
1000 | ||
1001 | /* | |
1002 | * route map handling | |
1003 | * This code is here because it allocates an interned attr which | |
1004 | * must be freed before we return. It's easier to put it after | |
1005 | * all of the possible returns above. | |
1006 | */ | |
1007 | memset(&hattr, 0, sizeof(struct attr)); | |
1008 | bgp_attr_dup(&hattr, attr); /* hattr becomes a ghost attr */ | |
1009 | ||
1010 | if (rmap) { | |
1011 | struct bgp_info info; | |
1012 | route_map_result_t ret; | |
1013 | ||
1014 | memset(&info, 0, sizeof(info)); | |
1015 | info.peer = peer; | |
1016 | info.attr = &hattr; | |
1017 | ret = route_map_apply(rmap, prefix, RMAP_BGP, &info); | |
1018 | if (ret == RMAP_DENYMATCH) { | |
1019 | bgp_attr_flush(&hattr); | |
1020 | vnc_zlog_debug_verbose( | |
1021 | "%s: route map \"%s\" says DENY, returning", | |
1022 | __func__, rmap->name); | |
1023 | return; | |
1024 | } | |
1025 | } | |
1026 | ||
1027 | iattr = bgp_attr_intern(&hattr); | |
1028 | bgp_attr_flush(&hattr); | |
1029 | ||
1030 | /* Now iattr is an allocated interned attr */ | |
1031 | ||
1032 | /* | |
1033 | * RFG-specific code | |
1034 | * | |
1035 | * Sets RD in dummy HD | |
1036 | * Allocates ecom | |
1037 | */ | |
1038 | { | |
1039 | ||
1040 | memset(&prd, 0, sizeof(prd)); | |
1041 | prd = rfg->rd; | |
1042 | prd.family = AF_UNSPEC; | |
1043 | prd.prefixlen = 64; | |
1044 | ||
1045 | if (rfg->rd.family == AF_UNIX) { | |
1046 | rfapi_set_autord_from_vn(&prd, &vnaddr); | |
1047 | } | |
1048 | ||
1049 | if (rfg->rt_export_list) | |
1050 | ecom = ecommunity_dup( | |
1051 | bgp->rfapi_cfg->rfg_redist->rt_export_list); | |
1052 | else | |
1053 | ecom = ecommunity_new(); | |
1054 | ||
1055 | if (iattr && iattr->ecommunity) | |
1056 | ecom = ecommunity_merge(ecom, iattr->ecommunity); | |
1057 | } | |
1058 | ||
1059 | local_pref = calc_local_pref(iattr, peer); | |
1060 | ||
1061 | if (VNC_DEBUG(IMPORT_BGP_ADD_ROUTE)) { | |
1062 | char buf[BUFSIZ]; | |
1063 | ||
1064 | buf[0] = 0; | |
1065 | rfapiRfapiIpAddr2Str(&vnaddr, buf, BUFSIZ); | |
1066 | buf[BUFSIZ - 1] = 0; | |
1067 | vnc_zlog_debug_any("%s: setting vnaddr to %s", __func__, buf); | |
1068 | } | |
1069 | ||
1070 | vncHDBgpDirect.peer = peer; | |
1071 | add_vnc_route(&vncHDBgpDirect, bgp, SAFI_MPLS_VPN, prefix, &prd, | |
1072 | &vnaddr, &local_pref, &(bgp->rfapi_cfg->redist_lifetime), | |
1073 | NULL, /* RFP options */ | |
1074 | NULL, NULL, ecom, NULL, /* med */ | |
1075 | NULL, /* label: default */ | |
1076 | ZEBRA_ROUTE_BGP_DIRECT, BGP_ROUTE_REDISTRIBUTE, | |
1077 | ahr_flags); | |
1078 | vncHDBgpDirect.peer = NULL; | |
1079 | ||
1080 | if (ecom) | |
1081 | ecommunity_free(&ecom); | |
65efcfce LB |
1082 | } |
1083 | ||
d62a17ae | 1084 | static void vnc_import_bgp_del_route_mode_plain(struct bgp *bgp, |
1085 | struct prefix *prefix, | |
1086 | struct bgp_info *info) | |
65efcfce | 1087 | { |
d62a17ae | 1088 | struct prefix_rd prd; |
1089 | afi_t afi = family2afi(prefix->family); | |
1090 | struct prefix *vn_pfx = NULL; | |
1091 | struct rfapi_ip_addr vnaddr; | |
1092 | struct prefix vn_pfx_space; | |
1093 | ||
1094 | ||
1095 | assert(afi); | |
1096 | ||
1097 | /* | |
1098 | * Compute VN address | |
1099 | */ | |
1100 | ||
1101 | if (info && info->attr) { | |
1102 | rfapiUnicastNexthop2Prefix(afi, info->attr, &vn_pfx_space); | |
1103 | } else { | |
1104 | vnc_zlog_debug_verbose("%s: no attr, can't delete route", | |
1105 | __func__); | |
1106 | return; | |
1107 | } | |
1108 | vn_pfx = &vn_pfx_space; | |
1109 | ||
1110 | vnaddr.addr_family = vn_pfx->family; | |
1111 | switch (vn_pfx->family) { | |
1112 | case AF_INET: | |
1113 | if (vn_pfx->prefixlen != 32) { | |
1114 | vnc_zlog_debug_verbose( | |
1115 | "%s: redist VN plen (%d) != 32, skipping", | |
1116 | __func__, vn_pfx->prefixlen); | |
1117 | return; | |
1118 | } | |
1119 | vnaddr.addr.v4 = vn_pfx->u.prefix4; | |
1120 | break; | |
1121 | ||
1122 | case AF_INET6: | |
1123 | if (vn_pfx->prefixlen != 128) { | |
1124 | vnc_zlog_debug_verbose( | |
1125 | "%s: redist VN plen (%d) != 128, skipping", | |
1126 | __func__, vn_pfx->prefixlen); | |
1127 | return; | |
1128 | } | |
1129 | vnaddr.addr.v6 = vn_pfx->u.prefix6; | |
1130 | break; | |
1131 | ||
1132 | default: | |
1133 | vnc_zlog_debug_verbose( | |
1134 | "%s: no redist RFG VN host pfx configured, skipping", | |
1135 | __func__); | |
1136 | return; | |
1137 | } | |
1138 | ||
1139 | ||
1140 | memset(&prd, 0, sizeof(prd)); | |
1141 | if (rfapi_set_autord_from_vn(&prd, &vnaddr)) { | |
1142 | vnc_zlog_debug_verbose("%s: can't auto-assign RD, skipping", | |
1143 | __func__); | |
1144 | return; | |
1145 | } | |
1146 | ||
1147 | vncHDBgpDirect.peer = info->peer; | |
1148 | vnc_zlog_debug_verbose("%s: setting peer to %p", __func__, | |
1149 | vncHDBgpDirect.peer); | |
1150 | del_vnc_route(&vncHDBgpDirect, info->peer, bgp, SAFI_MPLS_VPN, prefix, | |
1151 | &prd, ZEBRA_ROUTE_BGP_DIRECT, BGP_ROUTE_REDISTRIBUTE, | |
1152 | NULL, 1); | |
1153 | ||
1154 | vncHDBgpDirect.peer = NULL; | |
65efcfce LB |
1155 | } |
1156 | ||
d62a17ae | 1157 | static void vnc_import_bgp_del_route_mode_nvegroup(struct bgp *bgp, |
1158 | struct prefix *prefix, | |
1159 | struct bgp_info *info) | |
65efcfce | 1160 | { |
d62a17ae | 1161 | struct prefix_rd prd; |
1162 | afi_t afi = family2afi(prefix->family); | |
1163 | struct rfapi_nve_group_cfg *rfg = NULL; | |
1164 | struct prefix *vn_pfx = NULL; | |
1165 | struct rfapi_ip_addr vnaddr; | |
1166 | ||
1167 | ||
1168 | assert(afi); | |
1169 | ||
2ad7c8ec DS |
1170 | rfg = bgp->rfapi_cfg->rfg_redist; |
1171 | assert(rfg); | |
d62a17ae | 1172 | |
1173 | /* | |
1174 | * Compute VN address | |
1175 | */ | |
1176 | ||
1177 | /* | |
1178 | * export nve group's VN addr prefix must be a /32 which | |
1179 | * will yield the VN addr to use | |
1180 | */ | |
1181 | vn_pfx = &rfg->vn_prefix; | |
1182 | ||
1183 | ||
1184 | vnaddr.addr_family = vn_pfx->family; | |
1185 | switch (vn_pfx->family) { | |
1186 | case AF_INET: | |
1187 | if (vn_pfx->prefixlen != 32) { | |
1188 | vnc_zlog_debug_verbose( | |
1189 | "%s: redist VN plen (%d) != 32, skipping", | |
1190 | __func__, vn_pfx->prefixlen); | |
1191 | return; | |
1192 | } | |
1193 | vnaddr.addr.v4 = vn_pfx->u.prefix4; | |
1194 | break; | |
1195 | ||
1196 | case AF_INET6: | |
1197 | if (vn_pfx->prefixlen != 128) { | |
1198 | vnc_zlog_debug_verbose( | |
1199 | "%s: redist VN plen (%d) != 128, skipping", | |
1200 | __func__, vn_pfx->prefixlen); | |
1201 | return; | |
1202 | } | |
1203 | vnaddr.addr.v6 = vn_pfx->u.prefix6; | |
1204 | break; | |
1205 | ||
1206 | default: | |
1207 | vnc_zlog_debug_verbose( | |
1208 | "%s: no redist RFG VN host pfx configured, skipping", | |
1209 | __func__); | |
1210 | return; | |
1211 | } | |
1212 | ||
1213 | memset(&prd, 0, sizeof(prd)); | |
1214 | prd = rfg->rd; | |
1215 | prd.family = AF_UNSPEC; | |
1216 | prd.prefixlen = 64; | |
1217 | ||
1218 | if (rfg->rd.family == AF_UNIX) { | |
1219 | /* means "auto" with VN addr */ | |
1220 | if (rfapi_set_autord_from_vn(&prd, &vnaddr)) { | |
1221 | vnc_zlog_debug_verbose( | |
1222 | "%s: can't auto-assign RD, skipping", __func__); | |
1223 | return; | |
1224 | } | |
1225 | } | |
1226 | ||
1227 | ||
1228 | vncHDBgpDirect.peer = info->peer; | |
1229 | vnc_zlog_debug_verbose("%s: setting peer to %p", __func__, | |
1230 | vncHDBgpDirect.peer); | |
1231 | del_vnc_route(&vncHDBgpDirect, info->peer, bgp, SAFI_MPLS_VPN, prefix, | |
1232 | &prd, ZEBRA_ROUTE_BGP_DIRECT, BGP_ROUTE_REDISTRIBUTE, | |
1233 | NULL, 1); | |
1234 | ||
1235 | vncHDBgpDirect.peer = NULL; | |
65efcfce LB |
1236 | } |
1237 | ||
d62a17ae | 1238 | static void vnc_import_bgp_del_route_mode_resolve_nve_one_bi( |
1239 | struct bgp *bgp, afi_t afi, struct bgp_info *bi, /* VPN bi */ | |
1240 | struct prefix_rd *prd, /* RD */ | |
1241 | struct prefix *prefix) /* unicast route prefix */ | |
65efcfce | 1242 | { |
d62a17ae | 1243 | struct prefix un; |
1244 | ||
1245 | if (bi->type != ZEBRA_ROUTE_BGP && bi->type != ZEBRA_ROUTE_BGP_DIRECT) { | |
65efcfce | 1246 | |
d62a17ae | 1247 | return; |
1248 | } | |
1249 | if (bi->sub_type != BGP_ROUTE_NORMAL && bi->sub_type != BGP_ROUTE_STATIC | |
1250 | && bi->sub_type != BGP_ROUTE_RFP) { | |
1251 | ||
1252 | return; | |
1253 | } | |
1254 | if (CHECK_FLAG(bi->flags, BGP_INFO_REMOVED)) | |
1255 | return; | |
1256 | ||
1257 | vncHDResolveNve.peer = bi->peer; | |
1258 | if (!rfapiGetVncTunnelUnAddr(bi->attr, &un)) { | |
1259 | if (rfapiQprefix2Raddr(&un, &vncHDResolveNve.un_addr)) | |
1260 | return; | |
1261 | } else { | |
1262 | memset(&vncHDResolveNve.un_addr, 0, | |
1263 | sizeof(vncHDResolveNve.un_addr)); | |
1264 | } | |
1265 | ||
1266 | del_vnc_route(&vncHDResolveNve, vncHDResolveNve.peer, bgp, | |
1267 | SAFI_MPLS_VPN, prefix, /* unicast route prefix */ | |
1268 | prd, ZEBRA_ROUTE_BGP_DIRECT, BGP_ROUTE_REDISTRIBUTE, NULL, | |
1269 | 0); /* flags */ | |
65efcfce LB |
1270 | } |
1271 | ||
d62a17ae | 1272 | static void vnc_import_bgp_del_route_mode_resolve_nve_one_rd( |
1273 | struct prefix_rd *prd, | |
1274 | struct bgp_table *table_rd, /* per-rd VPN route table */ | |
1275 | afi_t afi, struct bgp *bgp, struct prefix *prefix, /* unicast prefix */ | |
1276 | struct prefix *ubi_nexthop) /* unicast bi's nexthop */ | |
65efcfce | 1277 | { |
d62a17ae | 1278 | struct bgp_node *bn; |
1279 | struct bgp_info *bi; | |
65efcfce | 1280 | |
d62a17ae | 1281 | if (!table_rd) |
1282 | return; | |
65efcfce | 1283 | |
d62a17ae | 1284 | { |
872ed4c7 | 1285 | char str_nh[PREFIX_STRLEN]; |
65efcfce | 1286 | |
872ed4c7 | 1287 | prefix2str(ubi_nexthop, str_nh, sizeof(str_nh)); |
d62a17ae | 1288 | vnc_zlog_debug_verbose("%s: ubi_nexthop=%s", __func__, str_nh); |
1289 | } | |
65efcfce LB |
1290 | |
1291 | ||
d62a17ae | 1292 | /* exact match */ |
1293 | bn = bgp_node_lookup(table_rd, ubi_nexthop); | |
1294 | if (!bn) { | |
1295 | vnc_zlog_debug_verbose( | |
1296 | "%s: no match in RD's table for ubi_nexthop", __func__); | |
1297 | return; | |
1298 | } | |
65efcfce | 1299 | |
d62a17ae | 1300 | /* Iterate over bgp_info items at this node */ |
1301 | for (bi = bn->info; bi; bi = bi->next) { | |
65efcfce | 1302 | |
d62a17ae | 1303 | vnc_import_bgp_del_route_mode_resolve_nve_one_bi( |
1304 | bgp, afi, bi, /* VPN bi */ | |
1305 | prd, /* VPN RD */ | |
1306 | prefix); /* unicast route prefix */ | |
1307 | } | |
65efcfce | 1308 | |
d62a17ae | 1309 | bgp_unlock_node(bn); |
65efcfce LB |
1310 | } |
1311 | ||
d62a17ae | 1312 | static void vnc_import_bgp_del_route_mode_resolve_nve(struct bgp *bgp, |
1313 | afi_t afi, | |
1314 | struct prefix *prefix, | |
1315 | struct bgp_info *info) | |
65efcfce | 1316 | { |
d62a17ae | 1317 | struct ecommunity *ecom = NULL; |
1318 | struct prefix pfx_unicast_nexthop = {0}; /* happy valgrind */ | |
1319 | ||
1320 | // struct listnode *hnode; | |
1321 | // struct rfapi_descriptor *rfd; | |
1322 | struct prefix_bag *pb; | |
1323 | void *cursor; | |
1324 | struct skiplist *sl = bgp->rfapi->resolve_nve_nexthop; | |
1325 | int rc; | |
1326 | struct bgp_node *bnp; /* prd table node */ | |
1327 | ||
1328 | if (!sl) { | |
1329 | vnc_zlog_debug_verbose("%s: no RHN entries, skipping", | |
1330 | __func__); | |
1331 | return; | |
1332 | } | |
65efcfce | 1333 | |
d62a17ae | 1334 | if (info->type != ZEBRA_ROUTE_BGP) { |
1335 | vnc_zlog_debug_verbose( | |
1336 | "%s: unicast type %d=\"%s\" is not %d=%s, skipping", | |
1337 | __func__, info->type, zebra_route_string(info->type), | |
1338 | ZEBRA_ROUTE_BGP, "ZEBRA_ROUTE_BGP"); | |
1339 | return; | |
1340 | } | |
65efcfce | 1341 | |
d62a17ae | 1342 | if (process_unicast_route(bgp, afi, prefix, info, &ecom, |
1343 | &pfx_unicast_nexthop)) { | |
1344 | ||
1345 | vnc_zlog_debug_verbose( | |
1346 | "%s: process_unicast_route error, skipping", __func__); | |
1347 | return; | |
1348 | } | |
1349 | ||
1350 | rc = skiplist_first_value(sl, &pfx_unicast_nexthop, (void *)&pb, | |
1351 | &cursor); | |
1352 | while (!rc) { | |
1353 | if (pb->ubi == info) { | |
1354 | skiplist_delete(sl, &pfx_unicast_nexthop, pb); | |
1355 | bgp_info_unlock(info); | |
1356 | break; | |
1357 | } | |
1358 | rc = skiplist_next_value(sl, &pfx_unicast_nexthop, (void *)&pb, | |
1359 | &cursor); | |
1360 | } | |
1361 | ||
1362 | /* | |
1363 | * Iterate over RDs in VPN RIB. For each RD, look up unicast nexthop | |
1364 | * (exact match, /32). If an exact match is found, call add_vnc_route. | |
1365 | */ | |
1366 | ||
1367 | for (bnp = bgp_table_top(bgp->rib[afi][SAFI_MPLS_VPN]); bnp; | |
1368 | bnp = bgp_route_next(bnp)) { | |
1369 | ||
1370 | struct bgp_table *table; | |
1371 | ||
1372 | table = (struct bgp_table *)(bnp->info); | |
1373 | ||
1374 | if (!table) | |
1375 | continue; | |
1376 | ||
1377 | vnc_import_bgp_del_route_mode_resolve_nve_one_rd( | |
1378 | (struct prefix_rd *)&bnp->p, table, afi, bgp, prefix, | |
1379 | &pfx_unicast_nexthop); /* TBD how is this set? */ | |
1380 | } | |
1381 | ||
1382 | if (ecom) | |
1383 | ecommunity_free(&ecom); | |
1384 | } | |
65efcfce LB |
1385 | |
1386 | ||
1387 | /*********************************************************************** | |
1388 | * Add/Delete CE->NVE routes | |
1389 | ***********************************************************************/ | |
1390 | ||
1391 | /* | |
1392 | * Should be called whan a bi is added to VPN RIB. This function | |
1393 | * will check if it is a host route and return immediately if not. | |
1394 | */ | |
d62a17ae | 1395 | void vnc_import_bgp_add_vnc_host_route_mode_resolve_nve( |
1396 | struct bgp *bgp, struct prefix_rd *prd, /* RD */ | |
1397 | struct bgp_table *table_rd, /* per-rd VPN route table */ | |
1398 | struct prefix *prefix, /* VPN prefix */ | |
1399 | struct bgp_info *bi) /* new VPN host route */ | |
65efcfce | 1400 | { |
d62a17ae | 1401 | afi_t afi = family2afi(prefix->family); |
1402 | struct skiplist *sl = NULL; | |
1403 | int rc; | |
1404 | struct prefix_bag *pb; | |
1405 | void *cursor; | |
1406 | struct rfapi_cfg *hc = NULL; | |
1407 | ||
1408 | vnc_zlog_debug_verbose("%s: entry", __func__); | |
1409 | ||
1410 | if (afi != AFI_IP && afi != AFI_IP6) { | |
1411 | vnc_zlog_debug_verbose("%s: bad afi %d, skipping", __func__, | |
1412 | afi); | |
1413 | return; | |
1414 | } | |
1415 | ||
1416 | if (!(hc = bgp->rfapi_cfg)) { | |
1417 | vnc_zlog_debug_verbose("%s: bgp->rfapi_cfg is NULL, skipping", | |
1418 | __func__); | |
1419 | return; | |
1420 | } | |
65efcfce | 1421 | |
d62a17ae | 1422 | /* check vnc redist flag for bgp direct routes */ |
1423 | if (!hc->redist[afi][ZEBRA_ROUTE_BGP_DIRECT]) { | |
1424 | vnc_zlog_debug_verbose( | |
1425 | "%s: bgp->rfapi_cfg->redist[afi=%d][type=ZEBRA_ROUTE_BGP_DIRECT] is 0, skipping", | |
1426 | __func__, afi); | |
1427 | return; | |
1428 | } | |
65efcfce | 1429 | |
d62a17ae | 1430 | if (hc->redist_mode != VNC_REDIST_MODE_RESOLVE_NVE) { |
1431 | vnc_zlog_debug_verbose("%s: not in resolve-nve mode, skipping", | |
1432 | __func__); | |
1433 | return; | |
65efcfce LB |
1434 | } |
1435 | ||
8cea9547 | 1436 | if (bgp->rfapi) |
d62a17ae | 1437 | sl = bgp->rfapi->resolve_nve_nexthop; |
1438 | ||
1439 | if (!sl) { | |
1440 | vnc_zlog_debug_verbose( | |
1441 | "%s: no resolve_nve_nexthop skiplist, skipping", | |
1442 | __func__); | |
1443 | return; | |
1444 | } | |
1445 | ||
1446 | if (!is_host_prefix(prefix)) { | |
1447 | vnc_zlog_debug_verbose("%s: not host prefix, skipping", | |
1448 | __func__); | |
1449 | return; | |
1450 | } | |
1451 | ||
1452 | rc = skiplist_first_value(sl, prefix, (void *)&pb, &cursor); | |
1453 | while (!rc) { | |
1454 | struct ecommunity *ecom; | |
1455 | struct prefix pfx_unicast_nexthop; | |
1456 | uint32_t *med = NULL; | |
1457 | uint32_t local_pref; | |
1458 | ||
1459 | memset(&pfx_unicast_nexthop, 0, | |
1460 | sizeof(struct prefix)); /* keep valgrind happy */ | |
1461 | ||
1462 | if (VNC_DEBUG(IMPORT_BGP_ADD_ROUTE)) { | |
872ed4c7 DS |
1463 | char hbuf[PREFIX_STRLEN]; |
1464 | char ubuf[PREFIX_STRLEN]; | |
65efcfce | 1465 | |
872ed4c7 DS |
1466 | prefix2str(&pb->hpfx, hbuf, sizeof(hbuf)); |
1467 | prefix2str(&pb->upfx, ubuf, sizeof(ubuf)); | |
65efcfce | 1468 | |
d62a17ae | 1469 | vnc_zlog_debug_any( |
1470 | "%s: examining RHN Entry (q=%p): upfx=%s, hpfx=%s, ubi=%p", | |
1471 | __func__, cursor, ubuf, hbuf, pb->ubi); | |
1472 | } | |
65efcfce | 1473 | |
d62a17ae | 1474 | if (process_unicast_route(bgp, afi, &pb->upfx, pb->ubi, &ecom, |
1475 | &pfx_unicast_nexthop)) { | |
65efcfce | 1476 | |
d62a17ae | 1477 | vnc_zlog_debug_verbose( |
1478 | "%s: process_unicast_route error, skipping", | |
1479 | __func__); | |
1480 | continue; | |
1481 | } | |
1482 | local_pref = calc_local_pref(pb->ubi->attr, pb->ubi->peer); | |
65efcfce | 1483 | |
d62a17ae | 1484 | if (pb->ubi->attr |
1485 | && (pb->ubi->attr->flag | |
1486 | & ATTR_FLAG_BIT(BGP_ATTR_MULTI_EXIT_DISC))) { | |
65efcfce | 1487 | |
d62a17ae | 1488 | med = &pb->ubi->attr->med; |
1489 | } | |
65efcfce | 1490 | |
d62a17ae | 1491 | /* |
1492 | * Sanity check | |
1493 | */ | |
1494 | if (vnc_prefix_cmp(&pfx_unicast_nexthop, prefix)) { | |
872ed4c7 DS |
1495 | char str_unh[PREFIX_STRLEN]; |
1496 | char str_nve_pfx[PREFIX_STRLEN]; | |
65efcfce | 1497 | |
872ed4c7 DS |
1498 | prefix2str(&pfx_unicast_nexthop, str_unh, |
1499 | sizeof(str_unh)); | |
1500 | prefix2str(prefix, str_nve_pfx, sizeof(str_nve_pfx)); | |
d62a17ae | 1501 | |
1502 | vnc_zlog_debug_verbose( | |
1503 | "%s: FATAL: resolve_nve_nexthop list item bi nexthop %s != nve pfx %s", | |
1504 | __func__, str_unh, str_nve_pfx); | |
1505 | assert(0); | |
1506 | } | |
1507 | ||
1508 | vnc_import_bgp_add_route_mode_resolve_nve_one_bi( | |
1509 | bgp, afi, bi, /* VPN bi */ | |
1510 | prd, &pb->upfx, /* unicast prefix */ | |
1511 | &local_pref, med, ecom); | |
1512 | ||
1513 | if (ecom) | |
1514 | ecommunity_free(&ecom); | |
65efcfce LB |
1515 | |
1516 | #if DEBUG_RHN_LIST | |
d62a17ae | 1517 | /* debug */ |
1518 | { | |
872ed4c7 | 1519 | char pbuf[PREFIX_STRLEN]; |
65efcfce | 1520 | |
872ed4c7 | 1521 | prefix2str(prefix, pbuf, sizeof(pbuf)); |
65efcfce | 1522 | |
d62a17ae | 1523 | vnc_zlog_debug_verbose( |
1524 | "%s: advancing past RHN Entry (q=%p): with prefix %s", | |
1525 | __func__, cursor, pbuf); | |
1526 | print_rhn_list(__func__, NULL); /* debug */ | |
1527 | } | |
65efcfce | 1528 | #endif |
d62a17ae | 1529 | rc = skiplist_next_value(sl, prefix, (void *)&pb, &cursor); |
1530 | } | |
1531 | vnc_zlog_debug_verbose("%s: done", __func__); | |
65efcfce LB |
1532 | } |
1533 | ||
1534 | ||
d62a17ae | 1535 | void vnc_import_bgp_del_vnc_host_route_mode_resolve_nve( |
1536 | struct bgp *bgp, struct prefix_rd *prd, /* RD */ | |
1537 | struct bgp_table *table_rd, /* per-rd VPN route table */ | |
1538 | struct prefix *prefix, /* VPN prefix */ | |
1539 | struct bgp_info *bi) /* old VPN host route */ | |
65efcfce | 1540 | { |
d62a17ae | 1541 | afi_t afi = family2afi(prefix->family); |
1542 | struct skiplist *sl = NULL; | |
1543 | struct prefix_bag *pb; | |
1544 | void *cursor; | |
1545 | struct rfapi_cfg *hc = NULL; | |
1546 | int rc; | |
1547 | ||
1548 | { | |
872ed4c7 | 1549 | char str_pfx[PREFIX_STRLEN]; |
d62a17ae | 1550 | |
872ed4c7 | 1551 | prefix2str(prefix, str_pfx, sizeof(str_pfx)); |
d62a17ae | 1552 | |
1553 | vnc_zlog_debug_verbose("%s(bgp=%p, nve prefix=%s)", __func__, | |
1554 | bgp, str_pfx); | |
1555 | } | |
1556 | ||
1557 | if (afi != AFI_IP && afi != AFI_IP6) | |
1558 | return; | |
1559 | ||
1560 | if (!(hc = bgp->rfapi_cfg)) { | |
1561 | vnc_zlog_debug_verbose("%s: bgp->rfapi_cfg is NULL, skipping", | |
1562 | __func__); | |
1563 | return; | |
1564 | } | |
1565 | ||
1566 | /* check vnc redist flag for bgp direct routes */ | |
1567 | if (!hc->redist[afi][ZEBRA_ROUTE_BGP_DIRECT]) { | |
1568 | vnc_zlog_debug_verbose( | |
1569 | "%s: bgp->rfapi_cfg->redist[afi=%d][type=ZEBRA_ROUTE_BGP_DIRECT] is 0, skipping", | |
1570 | __func__, afi); | |
1571 | return; | |
1572 | } | |
1573 | ||
1574 | if (hc->redist_mode != VNC_REDIST_MODE_RESOLVE_NVE) { | |
1575 | vnc_zlog_debug_verbose("%s: not in resolve-nve mode, skipping", | |
1576 | __func__); | |
1577 | return; | |
1578 | } | |
1579 | ||
8cea9547 | 1580 | if (bgp->rfapi) |
d62a17ae | 1581 | sl = bgp->rfapi->resolve_nve_nexthop; |
1582 | ||
1583 | if (!sl) { | |
1584 | vnc_zlog_debug_verbose("%s: no RHN entries, skipping", | |
1585 | __func__); | |
1586 | return; | |
1587 | } | |
1588 | ||
1589 | if (!is_host_prefix(prefix)) { | |
1590 | vnc_zlog_debug_verbose("%s: not host route, skip", __func__); | |
1591 | return; | |
1592 | } | |
1593 | ||
1594 | /* | |
1595 | * Find all entries with key == CE in the RHN list | |
1596 | */ | |
1597 | rc = skiplist_first_value(sl, prefix, (void *)&pb, &cursor); | |
1598 | while (!rc) { | |
1599 | ||
1600 | struct ecommunity *ecom; | |
1601 | struct prefix pfx_unicast_nexthop; | |
1602 | ||
1603 | memset(&pfx_unicast_nexthop, 0, | |
1604 | sizeof(struct prefix)); /* keep valgrind happy */ | |
1605 | ||
1606 | if (process_unicast_route(bgp, afi, &pb->upfx, pb->ubi, &ecom, | |
1607 | &pfx_unicast_nexthop)) { | |
1608 | ||
1609 | vnc_zlog_debug_verbose( | |
1610 | "%s: process_unicast_route error, skipping", | |
1611 | __func__); | |
1612 | continue; | |
1613 | } | |
1614 | ||
1615 | /* | |
1616 | * Sanity check | |
1617 | */ | |
1618 | if (vnc_prefix_cmp(&pfx_unicast_nexthop, prefix)) { | |
872ed4c7 DS |
1619 | char str_unh[PREFIX_STRLEN]; |
1620 | char str_nve_pfx[PREFIX_STRLEN]; | |
d62a17ae | 1621 | |
872ed4c7 DS |
1622 | prefix2str(&pfx_unicast_nexthop, str_unh, |
1623 | sizeof(str_unh)); | |
1624 | prefix2str(prefix, str_nve_pfx, sizeof(str_nve_pfx)); | |
d62a17ae | 1625 | |
1626 | vnc_zlog_debug_verbose( | |
1627 | "%s: FATAL: resolve_nve_nexthop list item bi nexthop %s != nve pfx %s", | |
1628 | __func__, str_unh, str_nve_pfx); | |
1629 | assert(0); | |
1630 | } | |
1631 | ||
1632 | vnc_import_bgp_del_route_mode_resolve_nve_one_bi( | |
1633 | bgp, afi, bi, prd, &pb->upfx); | |
1634 | ||
1635 | if (ecom) | |
1636 | ecommunity_free(&ecom); | |
1637 | ||
1638 | rc = skiplist_next_value(sl, prefix, (void *)&pb, &cursor); | |
1639 | } | |
65efcfce LB |
1640 | } |
1641 | ||
1642 | ||
1643 | /*********************************************************************** | |
1644 | * Exterior Routes | |
1645 | ***********************************************************************/ | |
1646 | ||
1647 | #define DEBUG_IS_USABLE_INTERIOR 1 | |
1648 | ||
d62a17ae | 1649 | static int is_usable_interior_route(struct bgp_info *bi_interior) |
65efcfce | 1650 | { |
d62a17ae | 1651 | if (!VALID_INTERIOR_TYPE(bi_interior->type)) { |
65efcfce | 1652 | #if DEBUG_IS_USABLE_INTERIOR |
d62a17ae | 1653 | vnc_zlog_debug_verbose( |
1654 | "%s: NO: type %d is not valid interior type", __func__, | |
1655 | bi_interior->type); | |
65efcfce | 1656 | #endif |
d62a17ae | 1657 | return 0; |
1658 | } | |
1659 | if (!CHECK_FLAG(bi_interior->flags, BGP_INFO_VALID)) { | |
65efcfce | 1660 | #if DEBUG_IS_USABLE_INTERIOR |
d62a17ae | 1661 | vnc_zlog_debug_verbose("%s: NO: BGP_INFO_VALID not set", |
1662 | __func__); | |
65efcfce | 1663 | #endif |
d62a17ae | 1664 | return 0; |
1665 | } | |
1666 | return 1; | |
65efcfce LB |
1667 | } |
1668 | ||
1669 | /* | |
1670 | * There should be only one of these per prefix at a time. | |
1671 | * This should be called as a result of selection operation | |
1672 | * | |
1673 | * NB should be called espacially for bgp instances that are named, | |
1674 | * because the exterior routes will always come from one of those. | |
1675 | * We filter here on the instance name to make sure we get only the | |
1676 | * right routes. | |
1677 | */ | |
d62a17ae | 1678 | static void vnc_import_bgp_exterior_add_route_it( |
1679 | struct bgp *bgp, /* exterior instance, we hope */ | |
1680 | struct prefix *prefix, /* unicast prefix */ | |
1681 | struct bgp_info *info, /* unicast info */ | |
1682 | struct rfapi_import_table *it_only) /* NULL, or limit to this IT */ | |
65efcfce | 1683 | { |
d62a17ae | 1684 | struct rfapi *h; |
1685 | struct rfapi_cfg *hc; | |
1686 | struct prefix pfx_orig_nexthop; | |
1687 | struct rfapi_import_table *it; | |
1688 | struct bgp *bgp_default = bgp_get_default(); | |
1689 | afi_t afi = family2afi(prefix->family); | |
1690 | ||
1691 | if (!bgp_default) | |
1692 | return; | |
1693 | ||
1694 | h = bgp_default->rfapi; | |
1695 | hc = bgp_default->rfapi_cfg; | |
1696 | ||
1697 | vnc_zlog_debug_verbose("%s: entry with it=%p", __func__, it_only); | |
1698 | ||
1699 | if (!h || !hc) { | |
1700 | vnc_zlog_debug_verbose( | |
1701 | "%s: rfapi or rfapi_cfg not instantiated, skipping", | |
1702 | __func__); | |
1703 | return; | |
1704 | } | |
1705 | if (!hc->redist_bgp_exterior_view) { | |
1706 | vnc_zlog_debug_verbose("%s: exterior view not set, skipping", | |
1707 | __func__); | |
1708 | return; | |
1709 | } | |
1710 | if (bgp != hc->redist_bgp_exterior_view) { | |
1711 | vnc_zlog_debug_verbose( | |
1712 | "%s: bgp %p != hc->redist_bgp_exterior_view %p, skipping", | |
1713 | __func__, bgp, hc->redist_bgp_exterior_view); | |
1714 | return; | |
1715 | } | |
1716 | ||
1717 | if (!hc->redist[afi][ZEBRA_ROUTE_BGP_DIRECT_EXT]) { | |
1718 | vnc_zlog_debug_verbose( | |
1719 | "%s: redist of exterior routes not enabled, skipping", | |
1720 | __func__); | |
1721 | return; | |
1722 | } | |
1723 | ||
1724 | if (!info->attr) { | |
1725 | vnc_zlog_debug_verbose("%s: no info, skipping", __func__); | |
1726 | return; | |
1727 | } | |
1728 | ||
1729 | /* | |
1730 | * Extract nexthop from exterior route | |
1731 | * | |
1732 | * Incoming prefix is unicast. If v6, it is in multiprotocol area, | |
1733 | * but if v4 it is in attr->nexthop | |
1734 | */ | |
1735 | rfapiUnicastNexthop2Prefix(afi, info->attr, &pfx_orig_nexthop); | |
1736 | ||
1737 | for (it = h->imports; it; it = it->next) { | |
1738 | struct route_table *table; | |
1739 | struct route_node *rn; | |
1740 | struct route_node *par; | |
1741 | struct bgp_info *bi_interior; | |
1742 | int have_usable_route; | |
1743 | ||
1744 | vnc_zlog_debug_verbose("%s: doing it %p", __func__, it); | |
1745 | ||
1746 | if (it_only && (it_only != it)) { | |
1747 | vnc_zlog_debug_verbose("%s: doesn't match it_only %p", | |
1748 | __func__, it_only); | |
1749 | continue; | |
1750 | } | |
1751 | ||
1752 | table = it->imported_vpn[afi]; | |
1753 | ||
1754 | for (rn = route_node_match(table, &pfx_orig_nexthop), | |
1755 | have_usable_route = 0; | |
1756 | (!have_usable_route) && rn;) { | |
1757 | ||
1758 | vnc_zlog_debug_verbose("%s: it %p trying rn %p", | |
1759 | __func__, it, rn); | |
1760 | ||
1761 | for (bi_interior = rn->info; bi_interior; | |
1762 | bi_interior = bi_interior->next) { | |
1763 | struct prefix_rd *prd; | |
1764 | struct attr new_attr; | |
1765 | u_int32_t label = 0; | |
1766 | ||
1767 | if (!is_usable_interior_route(bi_interior)) | |
1768 | continue; | |
1769 | ||
1770 | vnc_zlog_debug_verbose( | |
1771 | "%s: usable: bi_interior %p", __func__, | |
1772 | bi_interior); | |
1773 | ||
1774 | /* | |
1775 | * have a legitimate route to exterior's nexthop | |
1776 | * via NVE. | |
1777 | * | |
1778 | * Import unicast route to the import table | |
1779 | */ | |
1780 | have_usable_route = 1; | |
1781 | ||
1782 | if (bi_interior->extra) { | |
1783 | prd = &bi_interior->extra->vnc.import | |
1784 | .rd; | |
1785 | label = decode_label( | |
1786 | &bi_interior->extra->label); | |
1787 | } else | |
1788 | prd = NULL; | |
1789 | ||
1790 | /* use local_pref from unicast route */ | |
1791 | memset(&new_attr, 0, sizeof(struct attr)); | |
1792 | bgp_attr_dup(&new_attr, bi_interior->attr); | |
1793 | if (info->attr->flag | |
1794 | & ATTR_FLAG_BIT(BGP_ATTR_LOCAL_PREF)) { | |
1795 | new_attr.local_pref = | |
1796 | info->attr->local_pref; | |
1797 | new_attr.flag |= ATTR_FLAG_BIT( | |
1798 | BGP_ATTR_LOCAL_PREF); | |
1799 | } | |
1800 | ||
1801 | rfapiBgpInfoFilteredImportVPN( | |
1802 | it, FIF_ACTION_UPDATE, | |
1803 | bi_interior->peer, NULL, /* rfd */ | |
1804 | prefix, NULL, afi, prd, &new_attr, | |
1805 | ZEBRA_ROUTE_BGP_DIRECT_EXT, | |
1806 | BGP_ROUTE_REDISTRIBUTE, &label); | |
1807 | } | |
1808 | ||
1809 | if (have_usable_route) { | |
1810 | /* | |
1811 | * Make monitor | |
1812 | * | |
1813 | * TBD factor this out into its own function | |
1814 | */ | |
1815 | struct prefix *pfx_mon = prefix_new(); | |
1816 | if (!RFAPI_MONITOR_EXTERIOR(rn)->source) { | |
1817 | RFAPI_MONITOR_EXTERIOR(rn)->source = | |
1818 | skiplist_new( | |
1819 | 0, NULL, | |
1820 | (void (*)(void *)) | |
1821 | prefix_free); | |
1822 | route_lock_node(rn); /* for skiplist */ | |
1823 | } | |
1824 | route_lock_node(rn); /* for skiplist entry */ | |
1825 | prefix_copy(pfx_mon, prefix); | |
1826 | if (!skiplist_insert( | |
1827 | RFAPI_MONITOR_EXTERIOR(rn)->source, | |
1828 | info, pfx_mon)) { | |
1829 | ||
1830 | bgp_info_lock(info); | |
1831 | } | |
1832 | } | |
1833 | par = rn->parent; | |
1834 | if (par) | |
1835 | route_lock_node(par); | |
1836 | route_unlock_node(rn); | |
1837 | rn = par; | |
1838 | } | |
1839 | if (rn) | |
1840 | route_unlock_node(rn); | |
1841 | ||
1842 | if (!have_usable_route) { | |
1843 | struct prefix *pfx_mon = prefix_new(); | |
1844 | prefix_copy(pfx_mon, prefix); | |
1845 | if (!skiplist_insert(it->monitor_exterior_orphans, info, | |
1846 | pfx_mon)) { | |
1847 | ||
1848 | bgp_info_lock(info); | |
1849 | } | |
1850 | } | |
1851 | } | |
65efcfce LB |
1852 | } |
1853 | ||
d62a17ae | 1854 | void vnc_import_bgp_exterior_add_route( |
1855 | struct bgp *bgp, /* exterior instance, we hope */ | |
1856 | struct prefix *prefix, /* unicast prefix */ | |
1857 | struct bgp_info *info) /* unicast info */ | |
65efcfce | 1858 | { |
d62a17ae | 1859 | vnc_import_bgp_exterior_add_route_it(bgp, prefix, info, NULL); |
65efcfce LB |
1860 | } |
1861 | ||
1862 | /* | |
1863 | * There should be only one of these per prefix at a time. | |
1864 | * This should probably be called as a result of selection operation. | |
1865 | * | |
1866 | * NB should be called espacially for bgp instances that are named, | |
1867 | * because the exterior routes will always come from one of those. | |
1868 | * We filter here on the instance name to make sure we get only the | |
1869 | * right routes. | |
1870 | */ | |
d62a17ae | 1871 | void vnc_import_bgp_exterior_del_route( |
1872 | struct bgp *bgp, struct prefix *prefix, /* unicast prefix */ | |
1873 | struct bgp_info *info) /* unicast info */ | |
65efcfce | 1874 | { |
d62a17ae | 1875 | struct rfapi *h; |
1876 | struct rfapi_cfg *hc; | |
1877 | struct rfapi_import_table *it; | |
1878 | struct prefix pfx_orig_nexthop; | |
1879 | afi_t afi = family2afi(prefix->family); | |
1880 | struct bgp *bgp_default = bgp_get_default(); | |
1881 | ||
1882 | if (!bgp_default) | |
1883 | return; | |
1884 | ||
1885 | memset(&pfx_orig_nexthop, 0, | |
1886 | sizeof(struct prefix)); /* keep valgrind happy */ | |
1887 | ||
1888 | h = bgp_default->rfapi; | |
1889 | hc = bgp_default->rfapi_cfg; | |
1890 | ||
1891 | if (!h || !hc) { | |
1892 | vnc_zlog_debug_verbose( | |
1893 | "%s: rfapi or rfapi_cfg not instantiated, skipping", | |
1894 | __func__); | |
1895 | return; | |
1896 | } | |
1897 | if (!hc->redist_bgp_exterior_view) { | |
1898 | vnc_zlog_debug_verbose("%s: exterior view not set, skipping", | |
1899 | __func__); | |
1900 | return; | |
1901 | } | |
1902 | if (bgp != hc->redist_bgp_exterior_view) { | |
1903 | vnc_zlog_debug_verbose( | |
1904 | "%s: bgp %p != hc->redist_bgp_exterior_view %p, skipping", | |
1905 | __func__, bgp, hc->redist_bgp_exterior_view); | |
1906 | return; | |
1907 | } | |
1908 | if (!hc->redist[afi][ZEBRA_ROUTE_BGP_DIRECT_EXT]) { | |
1909 | vnc_zlog_debug_verbose( | |
1910 | "%s: redist of exterior routes no enabled, skipping", | |
1911 | __func__); | |
1912 | return; | |
1913 | } | |
1914 | ||
1915 | if (!info->attr) { | |
1916 | vnc_zlog_debug_verbose("%s: no info, skipping", __func__); | |
1917 | return; | |
1918 | } | |
1919 | ||
1920 | /* | |
1921 | * Extract nexthop from exterior route | |
1922 | * | |
1923 | * Incoming prefix is unicast. If v6, it is in multiprotocol area, | |
1924 | * but if v4 it is in attr->nexthop | |
1925 | */ | |
1926 | rfapiUnicastNexthop2Prefix(afi, info->attr, &pfx_orig_nexthop); | |
1927 | ||
1928 | for (it = h->imports; it; it = it->next) { | |
1929 | struct route_table *table; | |
1930 | struct route_node *rn; | |
1931 | struct route_node *par; | |
1932 | struct bgp_info *bi_interior; | |
1933 | int have_usable_route; | |
1934 | ||
1935 | table = it->imported_vpn[afi]; | |
1936 | ||
1937 | for (rn = route_node_match(table, &pfx_orig_nexthop), | |
1938 | have_usable_route = 0; | |
1939 | (!have_usable_route) && rn;) { | |
1940 | ||
1941 | for (bi_interior = rn->info; bi_interior; | |
1942 | bi_interior = bi_interior->next) { | |
1943 | struct prefix_rd *prd; | |
1944 | u_int32_t label = 0; | |
1945 | ||
1946 | if (!is_usable_interior_route(bi_interior)) | |
1947 | continue; | |
1948 | ||
1949 | /* | |
1950 | * have a legitimate route to exterior's nexthop | |
1951 | * via NVE. | |
1952 | * | |
1953 | * Import unicast route to the import table | |
1954 | */ | |
1955 | have_usable_route = 1; | |
1956 | ||
1957 | if (bi_interior->extra) { | |
1958 | prd = &bi_interior->extra->vnc.import | |
1959 | .rd; | |
1960 | label = decode_label( | |
1961 | &bi_interior->extra->label); | |
1962 | } else | |
1963 | prd = NULL; | |
1964 | ||
1965 | rfapiBgpInfoFilteredImportVPN( | |
1966 | it, FIF_ACTION_KILL, bi_interior->peer, | |
1967 | NULL, /* rfd */ | |
1968 | prefix, NULL, afi, prd, | |
1969 | bi_interior->attr, | |
1970 | ZEBRA_ROUTE_BGP_DIRECT_EXT, | |
1971 | BGP_ROUTE_REDISTRIBUTE, &label); | |
1972 | ||
1973 | /* | |
1974 | * Delete monitor | |
1975 | * | |
1976 | * TBD factor this out into its own function | |
1977 | */ | |
1978 | { | |
1979 | if (RFAPI_MONITOR_EXTERIOR(rn) | |
1980 | ->source) { | |
1981 | if (!skiplist_delete( | |
1982 | RFAPI_MONITOR_EXTERIOR( | |
1983 | rn) | |
1984 | ->source, | |
1985 | info, NULL)) { | |
1986 | ||
1987 | bgp_info_unlock(info); | |
1988 | route_unlock_node( | |
1989 | rn); /* sl entry | |
9d303b37 | 1990 | */ |
d62a17ae | 1991 | } |
1992 | if (skiplist_empty( | |
1993 | RFAPI_MONITOR_EXTERIOR( | |
1994 | rn) | |
1995 | ->source)) { | |
1996 | skiplist_free( | |
1997 | RFAPI_MONITOR_EXTERIOR( | |
1998 | rn) | |
1999 | ->source); | |
2000 | RFAPI_MONITOR_EXTERIOR( | |
2001 | rn) | |
2002 | ->source = NULL; | |
2003 | route_unlock_node( | |
2004 | rn); /* skiplist | |
2005 | itself | |
2006 | */ | |
2007 | } | |
2008 | } | |
2009 | } | |
2010 | } | |
2011 | par = rn->parent; | |
2012 | if (par) | |
2013 | route_lock_node(par); | |
2014 | route_unlock_node(rn); | |
2015 | rn = par; | |
2016 | } | |
2017 | if (rn) | |
2018 | route_unlock_node(rn); | |
2019 | ||
2020 | if (!have_usable_route) { | |
2021 | if (!skiplist_delete(it->monitor_exterior_orphans, info, | |
2022 | NULL)) { | |
2023 | ||
2024 | bgp_info_unlock(info); | |
2025 | } | |
2026 | } | |
2027 | } | |
65efcfce LB |
2028 | } |
2029 | ||
2030 | /* | |
2031 | * This function should be called after a new interior VPN route | |
2032 | * has been added to an import_table. | |
2033 | * | |
2034 | * NB should also be called whenever an existing vpn interior route | |
2035 | * becomes valid (e.g., valid_interior_count is inremented) | |
2036 | */ | |
d62a17ae | 2037 | void vnc_import_bgp_exterior_add_route_interior( |
2038 | struct bgp *bgp, struct rfapi_import_table *it, | |
2039 | struct route_node *rn_interior, /* VPN IT node */ | |
2040 | struct bgp_info *bi_interior) /* VPN IT route */ | |
65efcfce | 2041 | { |
d62a17ae | 2042 | afi_t afi = family2afi(rn_interior->p.family); |
2043 | struct route_node *par; | |
2044 | struct bgp_info *bi_exterior; | |
2045 | struct prefix *pfx_exterior; /* exterior pfx */ | |
2046 | void *cursor; | |
2047 | int rc; | |
2048 | struct list *list_adopted; | |
2049 | ||
2050 | vnc_zlog_debug_verbose("%s: entry", __func__); | |
2051 | ||
2052 | if (!is_usable_interior_route(bi_interior)) { | |
2053 | vnc_zlog_debug_verbose( | |
2054 | "%s: not usable interior route, skipping", __func__); | |
2055 | return; | |
2056 | } | |
2057 | ||
2058 | if (!bgp->rfapi_cfg->redist[afi][ZEBRA_ROUTE_BGP_DIRECT_EXT]) { | |
2059 | vnc_zlog_debug_verbose( | |
2060 | "%s: redist of exterior routes no enabled, skipping", | |
2061 | __func__); | |
2062 | return; | |
2063 | } | |
2064 | ||
2065 | if (it == bgp->rfapi->it_ce) { | |
2066 | vnc_zlog_debug_verbose("%s: import table is it_ce, skipping", | |
2067 | __func__); | |
2068 | return; | |
2069 | } | |
2070 | ||
2071 | /*debugging */ | |
2072 | { | |
872ed4c7 | 2073 | char str_pfx[PREFIX_STRLEN]; |
d62a17ae | 2074 | |
872ed4c7 | 2075 | prefix2str(&rn_interior->p, str_pfx, sizeof(str_pfx)); |
d62a17ae | 2076 | vnc_zlog_debug_verbose("%s: interior prefix=%s, bi type=%d", |
2077 | __func__, str_pfx, bi_interior->type); | |
2078 | } | |
2079 | ||
2080 | if (RFAPI_HAS_MONITOR_EXTERIOR(rn_interior)) { | |
2081 | ||
2082 | int count = 0; /* debugging */ | |
2083 | ||
2084 | vnc_zlog_debug_verbose( | |
2085 | "%s: has exterior monitor; ext src: %p", __func__, | |
2086 | RFAPI_MONITOR_EXTERIOR(rn_interior)->source); | |
2087 | ||
2088 | /* | |
2089 | * There is a monitor here already. Therefore, we do not need | |
2090 | * to do any pulldown. Just construct exterior routes based | |
2091 | * on the new interior route. | |
2092 | */ | |
2093 | cursor = NULL; | |
2094 | for (rc = skiplist_next( | |
2095 | RFAPI_MONITOR_EXTERIOR(rn_interior)->source, | |
2096 | (void **)&bi_exterior, (void **)&pfx_exterior, | |
2097 | &cursor); | |
2098 | !rc; rc = skiplist_next( | |
2099 | RFAPI_MONITOR_EXTERIOR(rn_interior)->source, | |
2100 | (void **)&bi_exterior, (void **)&pfx_exterior, | |
2101 | &cursor)) { | |
2102 | ||
2103 | struct prefix_rd *prd; | |
2104 | struct attr new_attr; | |
2105 | u_int32_t label = 0; | |
2106 | ||
2107 | ||
2108 | ++count; /* debugging */ | |
2109 | ||
2110 | assert(bi_exterior); | |
2111 | assert(pfx_exterior); | |
2112 | ||
2113 | if (bi_interior->extra) { | |
2114 | prd = &bi_interior->extra->vnc.import.rd; | |
2115 | label = decode_label( | |
2116 | &bi_interior->extra->label); | |
2117 | } else | |
2118 | prd = NULL; | |
2119 | ||
2120 | /* use local_pref from unicast route */ | |
2121 | memset(&new_attr, 0, sizeof(struct attr)); | |
2122 | bgp_attr_dup(&new_attr, bi_interior->attr); | |
2123 | if (bi_exterior | |
2124 | && (bi_exterior->attr->flag | |
2125 | & ATTR_FLAG_BIT(BGP_ATTR_LOCAL_PREF))) { | |
2126 | new_attr.local_pref = | |
2127 | bi_exterior->attr->local_pref; | |
2128 | new_attr.flag |= | |
2129 | ATTR_FLAG_BIT(BGP_ATTR_LOCAL_PREF); | |
2130 | } | |
2131 | ||
2132 | rfapiBgpInfoFilteredImportVPN( | |
2133 | it, FIF_ACTION_UPDATE, bi_interior->peer, | |
2134 | NULL, /* rfd */ | |
2135 | pfx_exterior, NULL, afi, prd, &new_attr, | |
2136 | ZEBRA_ROUTE_BGP_DIRECT_EXT, | |
2137 | BGP_ROUTE_REDISTRIBUTE, &label); | |
2138 | } | |
2139 | vnc_zlog_debug_verbose( | |
2140 | "%s: finished constructing exteriors based on existing monitors", | |
2141 | __func__); | |
2142 | return; | |
2143 | } | |
2144 | ||
2145 | vnc_zlog_debug_verbose("%s: no exterior monitor", __func__); | |
2146 | ||
2147 | /* | |
2148 | * No monitor at this node. Is this the first valid interior | |
2149 | * route at this node? | |
2150 | */ | |
2151 | if (RFAPI_MONITOR_EXTERIOR(rn_interior)->valid_interior_count > 1) { | |
2152 | vnc_zlog_debug_verbose( | |
2153 | "%s: new interior route not first valid one, skipping pulldown", | |
2154 | __func__); | |
2155 | return; | |
2156 | } | |
2157 | ||
2158 | /* | |
2159 | * Look up the tree for possible pulldown candidates. | |
2160 | * Find nearest parent with an exterior route monitor | |
2161 | */ | |
2162 | for (par = rn_interior->parent; par; par = par->parent) { | |
2163 | if (RFAPI_HAS_MONITOR_EXTERIOR(par)) | |
2164 | break; | |
2165 | } | |
2166 | ||
2167 | if (par) { | |
2168 | ||
2169 | vnc_zlog_debug_verbose( | |
2170 | "%s: checking parent %p for possible pulldowns", | |
2171 | __func__, par); | |
2172 | ||
2173 | /* check monitors at par for possible pulldown */ | |
2174 | cursor = NULL; | |
2175 | for (rc = skiplist_next(RFAPI_MONITOR_EXTERIOR(par)->source, | |
2176 | (void **)&bi_exterior, | |
2177 | (void **)&pfx_exterior, &cursor); | |
2178 | !rc; | |
2179 | rc = skiplist_next(RFAPI_MONITOR_EXTERIOR(par)->source, | |
2180 | (void **)&bi_exterior, | |
2181 | (void **)&pfx_exterior, &cursor)) { | |
2182 | ||
2183 | struct prefix pfx_nexthop; | |
2184 | ||
2185 | memset(&pfx_nexthop, 0, | |
2186 | sizeof(struct prefix)); /* keep valgrind happy */ | |
2187 | ||
2188 | /* check original nexthop for prefix match */ | |
2189 | rfapiUnicastNexthop2Prefix(afi, bi_exterior->attr, | |
2190 | &pfx_nexthop); | |
2191 | ||
2192 | if (prefix_match(&rn_interior->p, &pfx_nexthop)) { | |
2193 | ||
2194 | struct bgp_info *bi; | |
2195 | struct prefix_rd *prd; | |
2196 | struct attr new_attr; | |
2197 | u_int32_t label = 0; | |
2198 | ||
2199 | /* do pull-down */ | |
2200 | ||
2201 | /* | |
2202 | * add monitor to longer prefix | |
2203 | */ | |
2204 | struct prefix *pfx_mon = prefix_new(); | |
2205 | prefix_copy(pfx_mon, pfx_exterior); | |
2206 | if (!RFAPI_MONITOR_EXTERIOR(rn_interior) | |
2207 | ->source) { | |
2208 | RFAPI_MONITOR_EXTERIOR(rn_interior) | |
2209 | ->source = skiplist_new( | |
2210 | 0, NULL, | |
2211 | (void (*)(void *))prefix_free); | |
2212 | route_lock_node(rn_interior); | |
2213 | } | |
2214 | skiplist_insert( | |
2215 | RFAPI_MONITOR_EXTERIOR(rn_interior) | |
2216 | ->source, | |
2217 | bi_exterior, pfx_mon); | |
2218 | route_lock_node(rn_interior); | |
2219 | ||
2220 | /* | |
2221 | * Delete constructed exterior routes based on | |
2222 | * parent routes. | |
2223 | */ | |
2224 | for (bi = par->info; bi; bi = bi->next) { | |
2225 | ||
2226 | if (bi->extra) { | |
2227 | prd = &bi->extra->vnc.import.rd; | |
2228 | label = decode_label( | |
2229 | &bi->extra->label); | |
2230 | } else | |
2231 | prd = NULL; | |
2232 | ||
2233 | rfapiBgpInfoFilteredImportVPN( | |
2234 | it, FIF_ACTION_KILL, bi->peer, | |
2235 | NULL, /* rfd */ | |
2236 | pfx_exterior, NULL, afi, prd, | |
2237 | bi->attr, | |
2238 | ZEBRA_ROUTE_BGP_DIRECT_EXT, | |
2239 | BGP_ROUTE_REDISTRIBUTE, &label); | |
2240 | } | |
2241 | ||
2242 | ||
2243 | /* | |
2244 | * Add constructed exterior routes based on | |
2245 | * the new interior route at longer prefix. | |
2246 | */ | |
2247 | if (bi_interior->extra) { | |
2248 | prd = &bi_interior->extra->vnc.import | |
2249 | .rd; | |
2250 | label = decode_label( | |
2251 | &bi_interior->extra->label); | |
2252 | } else | |
2253 | prd = NULL; | |
2254 | ||
2255 | /* use local_pref from unicast route */ | |
2256 | memset(&new_attr, 0, sizeof(struct attr)); | |
2257 | bgp_attr_dup(&new_attr, bi_interior->attr); | |
2258 | if (bi_exterior | |
2259 | && (bi_exterior->attr->flag | |
2260 | & ATTR_FLAG_BIT(BGP_ATTR_LOCAL_PREF))) { | |
2261 | new_attr.local_pref = | |
2262 | bi_exterior->attr->local_pref; | |
2263 | new_attr.flag |= ATTR_FLAG_BIT( | |
2264 | BGP_ATTR_LOCAL_PREF); | |
2265 | } | |
2266 | ||
2267 | rfapiBgpInfoFilteredImportVPN( | |
2268 | it, FIF_ACTION_UPDATE, | |
2269 | bi_interior->peer, NULL, /* rfd */ | |
2270 | pfx_exterior, NULL, afi, prd, &new_attr, | |
2271 | ZEBRA_ROUTE_BGP_DIRECT_EXT, | |
2272 | BGP_ROUTE_REDISTRIBUTE, &label); | |
2273 | } | |
2274 | } | |
2275 | ||
2276 | /* | |
2277 | * The only monitors at rn_interior are the ones we added just | |
2278 | * above, so we can use the rn_interior list to identify which | |
2279 | * monitors to delete from the parent. | |
2280 | */ | |
2281 | cursor = NULL; | |
2282 | for (rc = skiplist_next( | |
2283 | RFAPI_MONITOR_EXTERIOR(rn_interior)->source, | |
2284 | (void **)&bi_exterior, NULL, &cursor); | |
2285 | !rc; rc = skiplist_next( | |
2286 | RFAPI_MONITOR_EXTERIOR(rn_interior)->source, | |
2287 | (void **)&bi_exterior, NULL, &cursor)) { | |
2288 | ||
2289 | ||
2290 | skiplist_delete(RFAPI_MONITOR_EXTERIOR(par)->source, | |
2291 | bi_exterior, NULL); | |
2292 | route_unlock_node(par); /* sl entry */ | |
2293 | } | |
2294 | if (skiplist_empty(RFAPI_MONITOR_EXTERIOR(par)->source)) { | |
2295 | skiplist_free(RFAPI_MONITOR_EXTERIOR(par)->source); | |
2296 | RFAPI_MONITOR_EXTERIOR(par)->source = NULL; | |
2297 | route_unlock_node(par); /* sl itself */ | |
2298 | } | |
2299 | } | |
2300 | ||
2301 | vnc_zlog_debug_verbose("%s: checking orphans", __func__); | |
2302 | ||
2303 | /* | |
2304 | * See if any orphans can be pulled down to the current node | |
2305 | */ | |
2306 | cursor = NULL; | |
2307 | list_adopted = NULL; | |
2308 | for (rc = skiplist_next(it->monitor_exterior_orphans, | |
2309 | (void **)&bi_exterior, (void **)&pfx_exterior, | |
2310 | &cursor); | |
2311 | !rc; rc = skiplist_next(it->monitor_exterior_orphans, | |
2312 | (void **)&bi_exterior, | |
2313 | (void **)&pfx_exterior, &cursor)) { | |
2314 | ||
2315 | struct prefix pfx_nexthop; | |
872ed4c7 | 2316 | char buf[PREFIX_STRLEN]; |
d62a17ae | 2317 | afi_t afi_exterior = family2afi(pfx_exterior->family); |
2318 | ||
2319 | prefix2str(pfx_exterior, buf, sizeof(buf)); | |
d62a17ae | 2320 | vnc_zlog_debug_verbose( |
2321 | "%s: checking exterior orphan at prefix %s", __func__, | |
2322 | buf); | |
2323 | ||
2324 | if (afi_exterior != afi) { | |
2325 | vnc_zlog_debug_verbose( | |
2326 | "%s: exterior orphan afi %d != interior afi %d, skip", | |
2327 | __func__, afi_exterior, afi); | |
2328 | continue; | |
2329 | } | |
2330 | ||
2331 | /* check original nexthop for prefix match */ | |
2332 | rfapiUnicastNexthop2Prefix(afi, bi_exterior->attr, | |
2333 | &pfx_nexthop); | |
2334 | ||
2335 | if (prefix_match(&rn_interior->p, &pfx_nexthop)) { | |
2336 | ||
2337 | struct prefix_rd *prd; | |
2338 | struct attr new_attr; | |
2339 | u_int32_t label = 0; | |
2340 | ||
2341 | /* do pull-down */ | |
2342 | ||
2343 | /* | |
2344 | * add monitor to longer prefix | |
2345 | */ | |
2346 | ||
2347 | struct prefix *pfx_mon = prefix_new(); | |
2348 | prefix_copy(pfx_mon, pfx_exterior); | |
2349 | if (!RFAPI_MONITOR_EXTERIOR(rn_interior)->source) { | |
2350 | RFAPI_MONITOR_EXTERIOR(rn_interior)->source = | |
2351 | skiplist_new( | |
2352 | 0, NULL, | |
2353 | (void (*)(void *))prefix_free); | |
2354 | route_lock_node(rn_interior); /* sl */ | |
2355 | } | |
2356 | skiplist_insert( | |
2357 | RFAPI_MONITOR_EXTERIOR(rn_interior)->source, | |
2358 | bi_exterior, pfx_mon); | |
2359 | route_lock_node(rn_interior); /* sl entry */ | |
2360 | if (!list_adopted) { | |
2361 | list_adopted = list_new(); | |
2362 | } | |
2363 | listnode_add(list_adopted, bi_exterior); | |
2364 | ||
2365 | /* | |
2366 | * Add constructed exterior routes based on the | |
2367 | * new interior route at the longer prefix. | |
2368 | */ | |
2369 | if (bi_interior->extra) { | |
2370 | prd = &bi_interior->extra->vnc.import.rd; | |
2371 | label = decode_label( | |
2372 | &bi_interior->extra->label); | |
2373 | } else | |
2374 | prd = NULL; | |
2375 | ||
2376 | /* use local_pref from unicast route */ | |
2377 | memset(&new_attr, 0, sizeof(struct attr)); | |
2378 | bgp_attr_dup(&new_attr, bi_interior->attr); | |
2379 | if (bi_exterior | |
2380 | && (bi_exterior->attr->flag | |
2381 | & ATTR_FLAG_BIT(BGP_ATTR_LOCAL_PREF))) { | |
2382 | new_attr.local_pref = | |
2383 | bi_exterior->attr->local_pref; | |
2384 | new_attr.flag |= | |
2385 | ATTR_FLAG_BIT(BGP_ATTR_LOCAL_PREF); | |
2386 | } | |
2387 | ||
2388 | rfapiBgpInfoFilteredImportVPN( | |
2389 | it, FIF_ACTION_UPDATE, bi_interior->peer, | |
2390 | NULL, /* rfd */ | |
2391 | pfx_exterior, NULL, afi, prd, &new_attr, | |
2392 | ZEBRA_ROUTE_BGP_DIRECT_EXT, | |
2393 | BGP_ROUTE_REDISTRIBUTE, &label); | |
2394 | } | |
2395 | } | |
2396 | if (list_adopted) { | |
2397 | struct listnode *node; | |
2398 | struct route_node *bi_exterior; | |
2399 | ||
2400 | for (ALL_LIST_ELEMENTS_RO(list_adopted, node, bi_exterior)) { | |
2401 | skiplist_delete(it->monitor_exterior_orphans, | |
2402 | bi_exterior, NULL); | |
2403 | } | |
affe9e99 | 2404 | list_delete_and_null(&list_adopted); |
d62a17ae | 2405 | } |
65efcfce LB |
2406 | } |
2407 | ||
2408 | /* | |
2409 | * This function should be called after an interior VPN route | |
2410 | * has been deleted from an import_table. | |
2411 | * bi_interior must still be valid, but it must already be detached | |
2412 | * from its route node and the route node's valid_interior_count | |
2413 | * must already be decremented. | |
2414 | * | |
2415 | * NB should also be called whenever an existing vpn interior route | |
2416 | * becomes invalid (e.g., valid_interior_count is decremented) | |
2417 | */ | |
d62a17ae | 2418 | void vnc_import_bgp_exterior_del_route_interior( |
2419 | struct bgp *bgp, struct rfapi_import_table *it, | |
2420 | struct route_node *rn_interior, /* VPN IT node */ | |
2421 | struct bgp_info *bi_interior) /* VPN IT route */ | |
65efcfce | 2422 | { |
d62a17ae | 2423 | afi_t afi = family2afi(rn_interior->p.family); |
2424 | struct route_node *par; | |
2425 | struct bgp_info *bi_exterior; | |
2426 | struct prefix *pfx_exterior; /* exterior pfx */ | |
2427 | void *cursor; | |
2428 | int rc; | |
2429 | ||
2430 | if (!VALID_INTERIOR_TYPE(bi_interior->type)) { | |
2431 | vnc_zlog_debug_verbose( | |
2432 | "%s: type %d not valid interior type, skipping", | |
2433 | __func__, bi_interior->type); | |
2434 | return; | |
2435 | } | |
2436 | ||
2437 | if (!bgp->rfapi_cfg->redist[afi][ZEBRA_ROUTE_BGP_DIRECT_EXT]) { | |
2438 | vnc_zlog_debug_verbose( | |
2439 | "%s: redist of exterior routes no enabled, skipping", | |
2440 | __func__); | |
2441 | return; | |
2442 | } | |
2443 | ||
2444 | if (it == bgp->rfapi->it_ce) { | |
2445 | vnc_zlog_debug_verbose("%s: it is it_ce, skipping", __func__); | |
2446 | return; | |
2447 | } | |
2448 | ||
2449 | /* If no exterior routes depend on this prefix, nothing to do */ | |
2450 | if (!RFAPI_HAS_MONITOR_EXTERIOR(rn_interior)) { | |
2451 | vnc_zlog_debug_verbose("%s: no exterior monitor, skipping", | |
2452 | __func__); | |
2453 | return; | |
2454 | } | |
2455 | ||
2456 | /*debugging */ | |
2457 | { | |
872ed4c7 | 2458 | char str_pfx[PREFIX_STRLEN]; |
d62a17ae | 2459 | |
872ed4c7 | 2460 | prefix2str(&rn_interior->p, str_pfx, sizeof(str_pfx)); |
d62a17ae | 2461 | |
2462 | vnc_zlog_debug_verbose("%s: interior prefix=%s, bi type=%d", | |
2463 | __func__, str_pfx, bi_interior->type); | |
2464 | } | |
2465 | ||
2466 | /* | |
2467 | * Remove constructed routes based on the deleted interior route | |
2468 | */ | |
2469 | cursor = NULL; | |
2470 | for (rc = skiplist_next(RFAPI_MONITOR_EXTERIOR(rn_interior)->source, | |
2471 | (void **)&bi_exterior, (void **)&pfx_exterior, | |
2472 | &cursor); | |
2473 | !rc; | |
2474 | rc = skiplist_next(RFAPI_MONITOR_EXTERIOR(rn_interior)->source, | |
2475 | (void **)&bi_exterior, (void **)&pfx_exterior, | |
2476 | &cursor)) { | |
2477 | ||
2478 | struct prefix_rd *prd; | |
2479 | u_int32_t label = 0; | |
2480 | ||
2481 | if (bi_interior->extra) { | |
2482 | prd = &bi_interior->extra->vnc.import.rd; | |
2483 | label = decode_label(&bi_interior->extra->label); | |
2484 | } else | |
2485 | prd = NULL; | |
2486 | ||
2487 | rfapiBgpInfoFilteredImportVPN( | |
2488 | it, FIF_ACTION_KILL, bi_interior->peer, NULL, /* rfd */ | |
2489 | pfx_exterior, NULL, afi, prd, bi_interior->attr, | |
2490 | ZEBRA_ROUTE_BGP_DIRECT_EXT, BGP_ROUTE_REDISTRIBUTE, | |
2491 | &label); | |
2492 | } | |
2493 | ||
2494 | /* | |
2495 | * If there are no remaining valid interior routes at this prefix, | |
2496 | * we need to look up the tree for a possible node to move monitors to | |
2497 | */ | |
2498 | if (RFAPI_MONITOR_EXTERIOR(rn_interior)->valid_interior_count) { | |
2499 | vnc_zlog_debug_verbose( | |
2500 | "%s: interior routes still present, skipping", | |
2501 | __func__); | |
2502 | return; | |
2503 | } | |
65efcfce | 2504 | |
d62a17ae | 2505 | /* |
2506 | * Find nearest parent with at least one valid interior route | |
2507 | * If none is found, par will end up NULL, and we will move | |
2508 | * the monitors to the orphan list for this import table | |
2509 | */ | |
2510 | for (par = rn_interior->parent; par; par = par->parent) { | |
2511 | if (RFAPI_MONITOR_EXTERIOR(par)->valid_interior_count) | |
2512 | break; | |
2513 | } | |
2514 | ||
2515 | vnc_zlog_debug_verbose("%s: par=%p, ext src: %p", __func__, par, | |
2516 | RFAPI_MONITOR_EXTERIOR(rn_interior)->source); | |
2517 | ||
2518 | /* move all monitors */ | |
2519 | /* | |
2520 | * We will use and delete every element of the source skiplist | |
2521 | */ | |
2522 | while (!skiplist_first(RFAPI_MONITOR_EXTERIOR(rn_interior)->source, | |
2523 | (void **)&bi_exterior, (void **)&pfx_exterior)) { | |
2524 | ||
2525 | struct prefix *pfx_mon = prefix_new(); | |
2526 | ||
2527 | prefix_copy(pfx_mon, pfx_exterior); | |
2528 | ||
2529 | if (par) { | |
2530 | ||
2531 | struct bgp_info *bi; | |
2532 | ||
2533 | /* | |
2534 | * Add monitor to parent node | |
2535 | */ | |
2536 | if (!RFAPI_MONITOR_EXTERIOR(par)->source) { | |
2537 | RFAPI_MONITOR_EXTERIOR(par)->source = | |
2538 | skiplist_new( | |
2539 | 0, NULL, | |
2540 | (void (*)(void *))prefix_free); | |
2541 | route_lock_node(par); /* sl */ | |
2542 | } | |
2543 | skiplist_insert(RFAPI_MONITOR_EXTERIOR(par)->source, | |
2544 | bi_exterior, pfx_mon); | |
2545 | route_lock_node(par); /* sl entry */ | |
2546 | ||
2547 | /* Add constructed exterior routes based on parent */ | |
2548 | for (bi = par->info; bi; bi = bi->next) { | |
2549 | ||
2550 | struct prefix_rd *prd; | |
2551 | struct attr new_attr; | |
2552 | u_int32_t label = 0; | |
2553 | ||
2554 | if (bi->type == ZEBRA_ROUTE_BGP_DIRECT_EXT) | |
2555 | continue; | |
2556 | ||
2557 | if (bi->extra) { | |
2558 | prd = &bi->extra->vnc.import.rd; | |
2559 | label = decode_label(&bi->extra->label); | |
2560 | } else | |
2561 | prd = NULL; | |
2562 | ||
2563 | /* use local_pref from unicast route */ | |
2564 | memset(&new_attr, 0, sizeof(struct attr)); | |
2565 | bgp_attr_dup(&new_attr, bi->attr); | |
2566 | if (bi_exterior | |
2567 | && (bi_exterior->attr->flag | |
2568 | & ATTR_FLAG_BIT(BGP_ATTR_LOCAL_PREF))) { | |
2569 | new_attr.local_pref = | |
2570 | bi_exterior->attr->local_pref; | |
2571 | new_attr.flag |= ATTR_FLAG_BIT( | |
2572 | BGP_ATTR_LOCAL_PREF); | |
2573 | } | |
2574 | ||
2575 | rfapiBgpInfoFilteredImportVPN( | |
2576 | it, FIF_ACTION_UPDATE, bi->peer, | |
2577 | NULL, /* rfd */ | |
2578 | pfx_exterior, NULL, afi, prd, &new_attr, | |
2579 | ZEBRA_ROUTE_BGP_DIRECT_EXT, | |
2580 | BGP_ROUTE_REDISTRIBUTE, &label); | |
2581 | } | |
2582 | ||
2583 | } else { | |
2584 | ||
2585 | /* | |
2586 | * No interior route for exterior's nexthop. Save | |
2587 | * monitor | |
2588 | * in orphan list to await future route. | |
2589 | */ | |
2590 | skiplist_insert(it->monitor_exterior_orphans, | |
2591 | bi_exterior, pfx_mon); | |
2592 | } | |
2593 | ||
2594 | skiplist_delete_first( | |
2595 | RFAPI_MONITOR_EXTERIOR(rn_interior)->source); | |
2596 | route_unlock_node(rn_interior); /* sl entry */ | |
2597 | } | |
2598 | if (skiplist_empty(RFAPI_MONITOR_EXTERIOR(rn_interior)->source)) { | |
2599 | skiplist_free(RFAPI_MONITOR_EXTERIOR(rn_interior)->source); | |
2600 | RFAPI_MONITOR_EXTERIOR(rn_interior)->source = NULL; | |
2601 | route_unlock_node(rn_interior); /* sl itself */ | |
2602 | } | |
65efcfce LB |
2603 | } |
2604 | ||
2605 | /*********************************************************************** | |
2606 | * Generic add/delete unicast routes | |
2607 | ***********************************************************************/ | |
2608 | ||
d62a17ae | 2609 | void vnc_import_bgp_add_route(struct bgp *bgp, struct prefix *prefix, |
2610 | struct bgp_info *info) | |
65efcfce | 2611 | { |
d62a17ae | 2612 | afi_t afi = family2afi(prefix->family); |
65efcfce | 2613 | |
7f88f54a | 2614 | if (VNC_DEBUG(VERBOSE)) { |
d62a17ae | 2615 | struct prefix pfx_nexthop; |
872ed4c7 DS |
2616 | char buf[PREFIX_STRLEN]; |
2617 | char buf_nh[PREFIX_STRLEN]; | |
65efcfce | 2618 | |
872ed4c7 | 2619 | prefix2str(prefix, buf, sizeof(buf)); |
d62a17ae | 2620 | rfapiUnicastNexthop2Prefix(afi, info->attr, &pfx_nexthop); |
872ed4c7 | 2621 | prefix2str(&pfx_nexthop, buf_nh, sizeof(buf_nh)); |
65efcfce | 2622 | |
d62a17ae | 2623 | vnc_zlog_debug_verbose("%s: pfx %s, nh %s", __func__, buf, |
2624 | buf_nh); | |
2625 | } | |
65efcfce | 2626 | #if DEBUG_RHN_LIST |
d62a17ae | 2627 | print_rhn_list(__func__, "ENTER "); |
65efcfce | 2628 | #endif |
d62a17ae | 2629 | VNC_RHNCK(enter); |
2630 | ||
2631 | if (!afi) { | |
2632 | zlog_err("%s: can't get afi of prefix", __func__); | |
2633 | return; | |
2634 | } | |
2635 | ||
2636 | if (!bgp->rfapi_cfg) { | |
2637 | vnc_zlog_debug_verbose("%s: bgp->rfapi_cfg is NULL, skipping", | |
2638 | __func__); | |
2639 | return; | |
2640 | } | |
2641 | ||
2642 | /* check vnc redist flag for bgp direct routes */ | |
2643 | if (!bgp->rfapi_cfg->redist[afi][ZEBRA_ROUTE_BGP_DIRECT]) { | |
2644 | vnc_zlog_debug_verbose( | |
2645 | "%s: bgp->rfapi_cfg->redist[afi=%d][type=%d=ZEBRA_ROUTE_BGP_DIRECT] is 0, skipping", | |
2646 | __func__, afi, ZEBRA_ROUTE_BGP_DIRECT); | |
2647 | return; | |
2648 | } | |
2649 | ||
2650 | switch (bgp->rfapi_cfg->redist_mode) { | |
2651 | case VNC_REDIST_MODE_PLAIN: | |
2652 | vnc_import_bgp_add_route_mode_plain(bgp, prefix, info); | |
2653 | break; | |
2654 | ||
2655 | case VNC_REDIST_MODE_RFG: | |
2656 | if (bgp->rfapi_cfg->rfg_redist) | |
2657 | vnc_import_bgp_add_route_mode_nvegroup( | |
2658 | bgp, prefix, info, bgp->rfapi_cfg->rfg_redist); | |
2659 | else | |
2660 | vnc_zlog_debug_verbose("%s: mode RFG but no redist RFG", | |
2661 | __func__); | |
2662 | break; | |
2663 | ||
2664 | case VNC_REDIST_MODE_RESOLVE_NVE: | |
2665 | vnc_import_bgp_add_route_mode_resolve_nve(bgp, prefix, info); | |
2666 | break; | |
2667 | } | |
65efcfce | 2668 | #if DEBUG_RHN_LIST |
d62a17ae | 2669 | print_rhn_list(__func__, "LEAVE "); |
65efcfce | 2670 | #endif |
d62a17ae | 2671 | VNC_RHNCK(leave); |
65efcfce LB |
2672 | } |
2673 | ||
2674 | /* | |
2675 | * "Withdrawing a Route" import process | |
2676 | */ | |
d62a17ae | 2677 | void vnc_import_bgp_del_route(struct bgp *bgp, struct prefix *prefix, |
2678 | struct bgp_info *info) /* unicast info */ | |
65efcfce | 2679 | { |
d62a17ae | 2680 | afi_t afi = family2afi(prefix->family); |
65efcfce | 2681 | |
d62a17ae | 2682 | assert(afi); |
65efcfce | 2683 | |
d62a17ae | 2684 | { |
2685 | struct prefix pfx_nexthop; | |
872ed4c7 DS |
2686 | char buf[PREFIX_STRLEN]; |
2687 | char buf_nh[PREFIX_STRLEN]; | |
65efcfce | 2688 | |
872ed4c7 | 2689 | prefix2str(prefix, buf, sizeof(buf)); |
d62a17ae | 2690 | rfapiUnicastNexthop2Prefix(afi, info->attr, &pfx_nexthop); |
872ed4c7 | 2691 | prefix2str(&pfx_nexthop, buf_nh, sizeof(buf_nh)); |
65efcfce | 2692 | |
d62a17ae | 2693 | vnc_zlog_debug_verbose("%s: pfx %s, nh %s", __func__, buf, |
2694 | buf_nh); | |
2695 | } | |
65efcfce | 2696 | #if DEBUG_RHN_LIST |
d62a17ae | 2697 | print_rhn_list(__func__, "ENTER "); |
65efcfce | 2698 | #endif |
d62a17ae | 2699 | VNC_RHNCK(enter); |
2700 | ||
2701 | if (!bgp->rfapi_cfg) { | |
2702 | vnc_zlog_debug_verbose("%s: bgp->rfapi_cfg is NULL, skipping", | |
2703 | __func__); | |
2704 | return; | |
2705 | } | |
2706 | ||
2707 | /* check bgp redist flag for vnc direct ("vpn") routes */ | |
2708 | if (!bgp->rfapi_cfg->redist[afi][ZEBRA_ROUTE_BGP_DIRECT]) { | |
2709 | vnc_zlog_debug_verbose( | |
2710 | "%s: bgp redistribution of afi=%d VNC direct routes is off", | |
2711 | __func__, afi); | |
2712 | return; | |
2713 | } | |
2714 | ||
2715 | switch (bgp->rfapi_cfg->redist_mode) { | |
2716 | case VNC_REDIST_MODE_PLAIN: | |
2717 | vnc_import_bgp_del_route_mode_plain(bgp, prefix, info); | |
2718 | break; | |
2719 | ||
2720 | case VNC_REDIST_MODE_RFG: | |
2721 | if (bgp->rfapi_cfg->rfg_redist) | |
2722 | vnc_import_bgp_del_route_mode_nvegroup(bgp, prefix, | |
2723 | info); | |
2724 | else | |
2725 | vnc_zlog_debug_verbose("%s: mode RFG but no redist RFG", | |
2726 | __func__); | |
2727 | break; | |
2728 | ||
2729 | case VNC_REDIST_MODE_RESOLVE_NVE: | |
2730 | vnc_import_bgp_del_route_mode_resolve_nve(bgp, afi, prefix, | |
2731 | info); | |
2732 | break; | |
2733 | } | |
65efcfce | 2734 | #if DEBUG_RHN_LIST |
d62a17ae | 2735 | print_rhn_list(__func__, "LEAVE "); |
65efcfce | 2736 | #endif |
d62a17ae | 2737 | VNC_RHNCK(leave); |
65efcfce LB |
2738 | } |
2739 | ||
2740 | ||
2741 | /*********************************************************************** | |
2742 | * Enable/Disable | |
2743 | ***********************************************************************/ | |
2744 | ||
d62a17ae | 2745 | void vnc_import_bgp_redist_enable(struct bgp *bgp, afi_t afi) |
65efcfce | 2746 | { |
d62a17ae | 2747 | /* iterate over bgp unicast v4 and v6 routes, call |
2748 | * vnc_import_bgp_add_route */ | |
65efcfce | 2749 | |
d62a17ae | 2750 | struct bgp_node *rn; |
65efcfce | 2751 | |
d62a17ae | 2752 | vnc_zlog_debug_verbose("%s: entry, afi=%d", __func__, afi); |
65efcfce | 2753 | |
d62a17ae | 2754 | if (bgp->rfapi_cfg->redist[afi][ZEBRA_ROUTE_BGP_DIRECT]) { |
2755 | vnc_zlog_debug_verbose( | |
2756 | "%s: already enabled for afi %d, skipping", __func__, | |
2757 | afi); | |
2758 | return; | |
2759 | } | |
2760 | bgp->rfapi_cfg->redist[afi][ZEBRA_ROUTE_BGP_DIRECT] = 1; | |
65efcfce | 2761 | |
d62a17ae | 2762 | for (rn = bgp_table_top(bgp->rib[afi][SAFI_UNICAST]); rn; |
2763 | rn = bgp_route_next(rn)) { | |
65efcfce | 2764 | |
d62a17ae | 2765 | struct bgp_info *bi; |
65efcfce | 2766 | |
d62a17ae | 2767 | for (bi = rn->info; bi; bi = bi->next) { |
65efcfce | 2768 | |
d62a17ae | 2769 | if (CHECK_FLAG(bi->flags, BGP_INFO_REMOVED)) |
2770 | continue; | |
65efcfce | 2771 | |
d62a17ae | 2772 | vnc_import_bgp_add_route(bgp, &rn->p, bi); |
2773 | } | |
2774 | } | |
2775 | vnc_zlog_debug_verbose( | |
2776 | "%s: set redist[afi=%d][type=%d=ZEBRA_ROUTE_BGP_DIRECT] return", | |
2777 | __func__, afi, ZEBRA_ROUTE_BGP_DIRECT); | |
65efcfce LB |
2778 | } |
2779 | ||
d62a17ae | 2780 | void vnc_import_bgp_exterior_redist_enable(struct bgp *bgp, afi_t afi) |
65efcfce | 2781 | { |
d62a17ae | 2782 | struct bgp *bgp_exterior; |
2783 | struct bgp_node *rn; | |
65efcfce | 2784 | |
d62a17ae | 2785 | bgp_exterior = bgp->rfapi_cfg->redist_bgp_exterior_view; |
65efcfce | 2786 | |
d62a17ae | 2787 | if (bgp->rfapi_cfg->redist[afi][ZEBRA_ROUTE_BGP_DIRECT_EXT]) { |
2788 | vnc_zlog_debug_verbose( | |
2789 | "%s: already enabled for afi %d, skipping", __func__, | |
2790 | afi); | |
2791 | return; | |
2792 | } | |
2793 | bgp->rfapi_cfg->redist[afi][ZEBRA_ROUTE_BGP_DIRECT_EXT] = 1; | |
65efcfce | 2794 | |
d62a17ae | 2795 | if (!bgp_exterior) { |
2796 | vnc_zlog_debug_verbose( | |
2797 | "%s: no exterior view set yet, no routes to import yet", | |
2798 | __func__); | |
2799 | return; | |
2800 | } | |
65efcfce | 2801 | |
d62a17ae | 2802 | for (rn = bgp_table_top(bgp_exterior->rib[afi][SAFI_UNICAST]); rn; |
2803 | rn = bgp_route_next(rn)) { | |
65efcfce | 2804 | |
d62a17ae | 2805 | struct bgp_info *bi; |
65efcfce | 2806 | |
d62a17ae | 2807 | for (bi = rn->info; bi; bi = bi->next) { |
65efcfce | 2808 | |
d62a17ae | 2809 | if (CHECK_FLAG(bi->flags, BGP_INFO_REMOVED)) |
2810 | continue; | |
65efcfce | 2811 | |
d62a17ae | 2812 | vnc_import_bgp_exterior_add_route(bgp_exterior, &rn->p, |
2813 | bi); | |
2814 | } | |
2815 | } | |
2816 | vnc_zlog_debug_verbose( | |
2817 | "%s: set redist[afi=%d][type=%d=ZEBRA_ROUTE_BGP_DIRECT] return", | |
2818 | __func__, afi, ZEBRA_ROUTE_BGP_DIRECT); | |
65efcfce LB |
2819 | } |
2820 | ||
2821 | /* | |
2822 | * This function is for populating a newly-created Import Table | |
2823 | */ | |
d62a17ae | 2824 | void vnc_import_bgp_exterior_redist_enable_it( |
2825 | struct bgp *bgp, afi_t afi, struct rfapi_import_table *it_only) | |
65efcfce | 2826 | { |
d62a17ae | 2827 | struct bgp *bgp_exterior; |
2828 | struct bgp_node *rn; | |
65efcfce | 2829 | |
d62a17ae | 2830 | vnc_zlog_debug_verbose("%s: entry", __func__); |
65efcfce | 2831 | |
d62a17ae | 2832 | bgp_exterior = bgp->rfapi_cfg->redist_bgp_exterior_view; |
65efcfce | 2833 | |
d62a17ae | 2834 | if (!bgp->rfapi_cfg->redist[afi][ZEBRA_ROUTE_BGP_DIRECT_EXT]) { |
2835 | vnc_zlog_debug_verbose("%s: not enabled for afi %d, skipping", | |
2836 | __func__, afi); | |
2837 | return; | |
2838 | } | |
65efcfce | 2839 | |
d62a17ae | 2840 | if (!bgp_exterior) { |
2841 | vnc_zlog_debug_verbose( | |
2842 | "%s: no exterior view set yet, no routes to import yet", | |
2843 | __func__); | |
2844 | return; | |
2845 | } | |
65efcfce | 2846 | |
d62a17ae | 2847 | for (rn = bgp_table_top(bgp_exterior->rib[afi][SAFI_UNICAST]); rn; |
2848 | rn = bgp_route_next(rn)) { | |
65efcfce | 2849 | |
d62a17ae | 2850 | struct bgp_info *bi; |
65efcfce | 2851 | |
d62a17ae | 2852 | for (bi = rn->info; bi; bi = bi->next) { |
65efcfce | 2853 | |
d62a17ae | 2854 | if (CHECK_FLAG(bi->flags, BGP_INFO_REMOVED)) |
2855 | continue; | |
65efcfce | 2856 | |
d62a17ae | 2857 | vnc_import_bgp_exterior_add_route_it( |
2858 | bgp_exterior, &rn->p, bi, it_only); | |
2859 | } | |
2860 | } | |
65efcfce LB |
2861 | } |
2862 | ||
2863 | ||
d62a17ae | 2864 | void vnc_import_bgp_redist_disable(struct bgp *bgp, afi_t afi) |
65efcfce | 2865 | { |
d62a17ae | 2866 | /* |
2867 | * iterate over vpn routes, find routes of type ZEBRA_ROUTE_BGP_DIRECT, | |
2868 | * delete (call timer expire immediately) | |
2869 | */ | |
2870 | struct bgp_node *rn1; | |
2871 | struct bgp_node *rn2; | |
2872 | ||
2873 | vnc_zlog_debug_verbose("%s: entry", __func__); | |
2874 | ||
2875 | if (!bgp->rfapi_cfg->redist[afi][ZEBRA_ROUTE_BGP_DIRECT]) { | |
2876 | vnc_zlog_debug_verbose( | |
2877 | "%s: already disabled for afi %d, skipping", __func__, | |
2878 | afi); | |
2879 | return; | |
2880 | } | |
2881 | ||
2882 | /* | |
2883 | * Two-level table for SAFI_MPLS_VPN | |
2884 | * Be careful when changing the things we iterate over | |
2885 | */ | |
2886 | for (rn1 = bgp_table_top(bgp->rib[afi][SAFI_MPLS_VPN]); rn1; | |
2887 | rn1 = bgp_route_next(rn1)) { | |
2888 | ||
2889 | if (rn1->info) { | |
2890 | for (rn2 = bgp_table_top(rn1->info); rn2; | |
2891 | rn2 = bgp_route_next(rn2)) { | |
2892 | ||
2893 | struct bgp_info *bi; | |
2894 | struct bgp_info *nextbi; | |
2895 | ||
2896 | for (bi = rn2->info; bi; bi = nextbi) { | |
2897 | ||
2898 | nextbi = bi->next; | |
2899 | ||
2900 | if (bi->type | |
2901 | == ZEBRA_ROUTE_BGP_DIRECT) { | |
2902 | ||
2903 | struct rfapi_descriptor *rfd; | |
2904 | vncHDBgpDirect.peer = bi->peer; | |
2905 | ||
2906 | rfd = bi->extra->vnc.export | |
2907 | .rfapi_handle; | |
2908 | ||
2909 | vnc_zlog_debug_verbose( | |
2910 | "%s: deleting bi=%p, bi->peer=%p, bi->type=%d, bi->sub_type=%d, bi->extra->vnc.export.rfapi_handle=%p [passing rfd=%p]", | |
2911 | __func__, bi, bi->peer, | |
2912 | bi->type, bi->sub_type, | |
2913 | (bi->extra | |
2914 | ? bi->extra | |
2915 | ->vnc | |
2916 | .export | |
2917 | .rfapi_handle | |
2918 | : NULL), | |
2919 | rfd); | |
2920 | ||
2921 | ||
2922 | del_vnc_route( | |
2923 | rfd, bi->peer, bgp, | |
2924 | SAFI_MPLS_VPN, &rn2->p, | |
2925 | (struct prefix_rd *)&rn1 | |
2926 | ->p, | |
2927 | bi->type, bi->sub_type, | |
2928 | NULL, 1); /* kill */ | |
2929 | ||
2930 | vncHDBgpDirect.peer = NULL; | |
2931 | } | |
2932 | } | |
2933 | } | |
2934 | } | |
2935 | } | |
2936 | /* Clear RHN list */ | |
2937 | if (bgp->rfapi->resolve_nve_nexthop) { | |
2938 | struct prefix_bag *pb; | |
2939 | struct bgp_info *info; | |
2940 | while (!skiplist_first(bgp->rfapi->resolve_nve_nexthop, NULL, | |
2941 | (void *)&pb)) { | |
2942 | info = pb->ubi; | |
2943 | skiplist_delete_first(bgp->rfapi->resolve_nve_nexthop); | |
2944 | bgp_info_unlock(info); | |
2945 | } | |
2946 | } | |
2947 | ||
2948 | bgp->rfapi_cfg->redist[afi][ZEBRA_ROUTE_BGP_DIRECT] = 0; | |
2949 | vnc_zlog_debug_verbose("%s: return", __func__); | |
65efcfce LB |
2950 | } |
2951 | ||
2952 | ||
d62a17ae | 2953 | void vnc_import_bgp_exterior_redist_disable(struct bgp *bgp, afi_t afi) |
65efcfce | 2954 | { |
d62a17ae | 2955 | struct rfapi_cfg *hc = bgp->rfapi_cfg; |
2956 | struct bgp *bgp_exterior = hc->redist_bgp_exterior_view; | |
65efcfce | 2957 | |
d62a17ae | 2958 | vnc_zlog_debug_verbose("%s: entry", __func__); |
65efcfce | 2959 | |
d62a17ae | 2960 | if (!hc->redist[afi][ZEBRA_ROUTE_BGP_DIRECT_EXT]) { |
2961 | vnc_zlog_debug_verbose( | |
2962 | "%s: already disabled for afi %d, skipping", __func__, | |
2963 | afi); | |
2964 | return; | |
2965 | } | |
65efcfce | 2966 | |
d62a17ae | 2967 | if (!bgp_exterior) { |
2968 | vnc_zlog_debug_verbose( | |
2969 | "%s: bgp exterior view not defined, skipping", | |
2970 | __func__); | |
2971 | return; | |
2972 | } | |
65efcfce LB |
2973 | |
2974 | ||
d62a17ae | 2975 | { |
2976 | struct bgp_node *rn; | |
2977 | for (rn = bgp_table_top(bgp_exterior->rib[afi][SAFI_UNICAST]); | |
2978 | rn; rn = bgp_route_next(rn)) { | |
65efcfce | 2979 | |
d62a17ae | 2980 | struct bgp_info *bi; |
65efcfce | 2981 | |
d62a17ae | 2982 | for (bi = rn->info; bi; bi = bi->next) { |
65efcfce | 2983 | |
d62a17ae | 2984 | if (CHECK_FLAG(bi->flags, BGP_INFO_REMOVED)) |
2985 | continue; | |
65efcfce | 2986 | |
d62a17ae | 2987 | vnc_import_bgp_exterior_del_route(bgp_exterior, |
2988 | &rn->p, bi); | |
2989 | } | |
2990 | } | |
65efcfce | 2991 | #if DEBUG_RHN_LIST |
d62a17ae | 2992 | print_rhn_list(__func__, NULL); |
65efcfce | 2993 | #endif |
d62a17ae | 2994 | } |
65efcfce | 2995 | |
d62a17ae | 2996 | bgp->rfapi_cfg->redist[afi][ZEBRA_ROUTE_BGP_DIRECT_EXT] = 0; |
2997 | vnc_zlog_debug_verbose("%s: return", __func__); | |
65efcfce | 2998 | } |