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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" | |
fe08ba7e | 28 | #include "lib/agg_table.h" |
f8b6f499 LB |
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" | |
02705213 | 35 | #include "lib/lib_errors.h" |
65efcfce | 36 | |
f8b6f499 LB |
37 | #include "bgpd/bgpd.h" |
38 | #include "bgpd/bgp_ecommunity.h" | |
39 | #include "bgpd/bgp_attr.h" | |
b2f0fa55 | 40 | #include "bgpd/bgp_route.h" |
d62a17ae | 41 | #include "bgpd/bgp_mplsvpn.h" /* for RD_TYPE_IP */ |
65efcfce | 42 | |
f8b6f499 LB |
43 | #include "bgpd/rfapi/vnc_export_bgp.h" |
44 | #include "bgpd/rfapi/bgp_rfapi_cfg.h" | |
45 | #include "bgpd/rfapi/rfapi.h" | |
46 | #include "bgpd/rfapi/rfapi_import.h" | |
47 | #include "bgpd/rfapi/rfapi_private.h" | |
48 | #include "bgpd/rfapi/rfapi_monitor.h" | |
49 | #include "bgpd/rfapi/rfapi_vty.h" | |
50 | #include "bgpd/rfapi/vnc_import_bgp.h" | |
51 | #include "bgpd/rfapi/vnc_import_bgp_p.h" | |
52 | #include "bgpd/rfapi/vnc_debug.h" | |
65efcfce LB |
53 | |
54 | #define ENABLE_VNC_RHNCK | |
55 | ||
56 | #define DEBUG_RHN_LIST 0 | |
57 | ||
58 | static struct rfapi_descriptor vncHDBgpDirect; /* dummy nve descriptor */ | |
59 | static struct rfapi_descriptor vncHDResolveNve; /* dummy nve descriptor */ | |
60 | ||
61 | /* | |
62 | * For routes from another AS: | |
63 | * | |
64 | * If MED is set, | |
65 | * LOCAL_PREF = 255 - MIN(255, MED) | |
66 | * else | |
67 | * LOCAL_PREF = default_local_pref | |
68 | * | |
69 | * For routes from the same AS: | |
70 | * | |
71 | * LOCAL_PREF unchanged | |
72 | */ | |
d62a17ae | 73 | uint32_t calc_local_pref(struct attr *attr, struct peer *peer) |
65efcfce | 74 | { |
d62a17ae | 75 | uint32_t local_pref = 0; |
76 | ||
77 | if (!attr) { | |
78 | if (peer) { | |
79 | return peer->bgp->default_local_pref; | |
80 | } | |
81 | return bgp_get_default()->default_local_pref; | |
82 | } | |
83 | ||
84 | if (peer && (peer->as != peer->bgp->as)) { | |
85 | if (attr->flag & ATTR_FLAG_BIT(BGP_ATTR_MULTI_EXIT_DISC)) { | |
86 | if (attr->med > 255) { | |
87 | local_pref = 0; | |
88 | } else { | |
89 | local_pref = 255 - attr->med; | |
90 | } | |
91 | } else { | |
92 | local_pref = peer->bgp->default_local_pref; | |
93 | } | |
94 | } else { | |
95 | if (attr->flag & ATTR_FLAG_BIT(BGP_ATTR_LOCAL_PREF)) { | |
96 | local_pref = attr->local_pref; | |
97 | } else { | |
98 | if (peer && peer->bgp) { | |
99 | local_pref = peer->bgp->default_local_pref; | |
100 | } | |
101 | } | |
102 | } | |
103 | ||
104 | return local_pref; | |
65efcfce LB |
105 | } |
106 | ||
5a1ae2c2 | 107 | static int is_host_prefix(const struct prefix *p) |
65efcfce | 108 | { |
d62a17ae | 109 | switch (p->family) { |
110 | case AF_INET: | |
111 | return (p->prefixlen == 32); | |
112 | case AF_INET6: | |
113 | return (p->prefixlen == 128); | |
114 | } | |
115 | return 0; | |
65efcfce LB |
116 | } |
117 | ||
118 | /*********************************************************************** | |
119 | * RHN list | |
120 | ***********************************************************************/ | |
121 | ||
d62a17ae | 122 | struct prefix_bag { |
123 | struct prefix hpfx; /* ce address = unicast nexthop */ | |
124 | struct prefix upfx; /* unicast prefix */ | |
40381db7 | 125 | struct bgp_path_info *ubpi; /* unicast route */ |
65efcfce LB |
126 | }; |
127 | ||
d7c0a89a QY |
128 | static const uint8_t maskbit[] = {0x00, 0x80, 0xc0, 0xe0, 0xf0, |
129 | 0xf8, 0xfc, 0xfe, 0xff}; | |
65efcfce | 130 | |
1a4189d4 | 131 | int vnc_prefix_cmp(const void *pfx1, const void *pfx2) |
65efcfce | 132 | { |
d62a17ae | 133 | int offset; |
134 | int shift; | |
d7c0a89a | 135 | uint8_t mask; |
d62a17ae | 136 | |
1a4189d4 DS |
137 | const struct prefix *p1 = pfx1; |
138 | const struct prefix *p2 = pfx2; | |
d62a17ae | 139 | |
140 | if (p1->family < p2->family) | |
141 | return -1; | |
142 | if (p1->family > p2->family) | |
143 | return 1; | |
144 | ||
145 | if (p1->prefixlen < p2->prefixlen) | |
146 | return -1; | |
147 | if (p1->prefixlen > p2->prefixlen) | |
148 | return 1; | |
149 | ||
150 | offset = p1->prefixlen / 8; | |
151 | shift = p1->prefixlen % 8; | |
152 | if (shift == 0 && offset) { /* catch aligned case */ | |
153 | offset--; | |
154 | shift = 8; | |
155 | } | |
156 | ||
157 | /* Set both prefix's head pointer. */ | |
d7c0a89a QY |
158 | const uint8_t *pp1 = (const uint8_t *)&p1->u.prefix; |
159 | const uint8_t *pp2 = (const uint8_t *)&p2->u.prefix; | |
d62a17ae | 160 | |
161 | while (offset--) { | |
162 | if (*pp1 < *pp2) | |
163 | return -1; | |
164 | if (*pp1 > *pp2) | |
165 | return 1; | |
166 | ++pp1; | |
167 | ++pp2; | |
168 | } | |
169 | ||
170 | mask = maskbit[shift]; | |
171 | if ((*pp1 & mask) < (*pp2 & mask)) | |
172 | return -1; | |
173 | if ((*pp1 & mask) > (*pp2 & mask)) | |
174 | return 1; | |
175 | ||
176 | return 0; | |
65efcfce LB |
177 | } |
178 | ||
d62a17ae | 179 | static void prefix_bag_free(void *pb) |
65efcfce | 180 | { |
d62a17ae | 181 | XFREE(MTYPE_RFAPI_PREFIX_BAG, pb); |
65efcfce LB |
182 | } |
183 | ||
184 | #if DEBUG_RHN_LIST | |
d62a17ae | 185 | static void print_rhn_list(const char *tag1, const char *tag2) |
65efcfce | 186 | { |
d62a17ae | 187 | struct bgp *bgp; |
188 | struct skiplist *sl; | |
189 | struct skiplistnode *p; | |
190 | struct prefix_bag *pb; | |
191 | int count = 0; | |
192 | ||
193 | bgp = bgp_get_default(); | |
194 | if (!bgp) | |
195 | return; | |
196 | ||
197 | sl = bgp->frapi->resolve_nve_nexthop; | |
198 | if (!sl) { | |
199 | vnc_zlog_debug_verbose("%s: %s: RHN List is empty", | |
200 | (tag1 ? tag1 : ""), (tag2 ? tag2 : "")); | |
201 | return; | |
202 | } | |
203 | ||
204 | vnc_zlog_debug_verbose("%s: %s: RHN list:", (tag1 ? tag1 : ""), | |
205 | (tag2 ? tag2 : "")); | |
206 | ||
207 | /* XXX uses secret knowledge of skiplist structure */ | |
208 | for (p = sl->header->forward[0]; p; p = p->forward[0]) { | |
d62a17ae | 209 | pb = p->value; |
210 | ||
d62a17ae | 211 | vnc_zlog_debug_verbose( |
2dbe669b DA |
212 | "RHN Entry %d (q=%p): kpfx=%pFX, upfx=%pFX, hpfx=%pFX, ubpi=%p", |
213 | ++count, p, p->key, &pb->upfx, &pb->hpfx, pb->ubpi); | |
d62a17ae | 214 | } |
65efcfce LB |
215 | } |
216 | #endif | |
217 | ||
218 | #ifdef ENABLE_VNC_RHNCK | |
d62a17ae | 219 | static void vnc_rhnck(char *tag) |
65efcfce | 220 | { |
d62a17ae | 221 | struct bgp *bgp; |
222 | struct skiplist *sl; | |
223 | struct skiplistnode *p; | |
224 | ||
225 | bgp = bgp_get_default(); | |
226 | if (!bgp) | |
227 | return; | |
228 | sl = bgp->rfapi->resolve_nve_nexthop; | |
229 | ||
230 | if (!sl) | |
231 | return; | |
232 | ||
233 | /* XXX uses secret knowledge of skiplist structure */ | |
234 | for (p = sl->header->forward[0]; p; p = p->forward[0]) { | |
235 | struct prefix_bag *pb; | |
236 | struct prefix *pkey; | |
237 | afi_t afi; | |
238 | struct prefix pfx_orig_nexthop; | |
239 | ||
240 | memset(&pfx_orig_nexthop, 0, | |
241 | sizeof(struct prefix)); /* keep valgrind happy */ | |
242 | ||
243 | pkey = p->key; | |
244 | pb = p->value; | |
245 | ||
246 | afi = family2afi(pb->upfx.family); | |
247 | ||
40381db7 | 248 | rfapiUnicastNexthop2Prefix(afi, pb->ubpi->attr, |
d62a17ae | 249 | &pfx_orig_nexthop); |
250 | ||
40381db7 | 251 | /* pb->hpfx, pb->ubpi nexthop, pkey should all reflect the same |
d62a17ae | 252 | * pfx */ |
253 | assert(!vnc_prefix_cmp(&pb->hpfx, pkey)); | |
254 | if (vnc_prefix_cmp(&pb->hpfx, &pfx_orig_nexthop)) { | |
d62a17ae | 255 | vnc_zlog_debug_verbose( |
2dbe669b DA |
256 | "%s: %s: FATAL: resolve_nve_nexthop list item bpi nexthop %pFX != nve pfx %pFX", |
257 | __func__, tag, &pfx_orig_nexthop, &pb->hpfx); | |
d62a17ae | 258 | assert(0); |
259 | } | |
260 | } | |
261 | vnc_zlog_debug_verbose("%s: vnc_rhnck OK", tag); | |
65efcfce LB |
262 | } |
263 | ||
772270f3 QY |
264 | #define VNC_RHNCK(n) \ |
265 | do { \ | |
266 | char buf[BUFSIZ]; \ | |
267 | snprintf(buf, sizeof(buf), "%s: %s", __func__, #n); \ | |
268 | vnc_rhnck(buf); \ | |
269 | } while (0) | |
65efcfce LB |
270 | |
271 | #else | |
272 | ||
273 | #define VNC_RHNCK(n) | |
274 | ||
275 | #endif | |
276 | ||
277 | /*********************************************************************** | |
278 | * Add/Delete Unicast Route | |
279 | ***********************************************************************/ | |
280 | ||
281 | /* | |
282 | * "Adding a Route" import process | |
283 | */ | |
284 | ||
285 | /* | |
286 | * extract and package information from the BGP unicast route. | |
287 | * Return code 0 means OK, non-0 means drop. | |
288 | * | |
289 | * If return code is 0, caller MUST release ecom | |
290 | */ | |
d62a17ae | 291 | static int process_unicast_route(struct bgp *bgp, /* in */ |
292 | afi_t afi, /* in */ | |
5a1ae2c2 DS |
293 | const struct prefix *prefix, /* in */ |
294 | struct bgp_path_info *info, /* in */ | |
295 | struct ecommunity **ecom, /* OUT */ | |
d62a17ae | 296 | struct prefix *unicast_nexthop) /* OUT */ |
65efcfce | 297 | { |
d62a17ae | 298 | struct rfapi_cfg *hc = bgp->rfapi_cfg; |
299 | struct peer *peer = info->peer; | |
300 | struct attr *attr = info->attr; | |
301 | struct attr hattr; | |
302 | struct route_map *rmap = NULL; | |
303 | struct prefix pfx_orig_nexthop; | |
304 | ||
305 | memset(&pfx_orig_nexthop, 0, | |
306 | sizeof(struct prefix)); /* keep valgrind happy */ | |
307 | ||
308 | /* | |
309 | * prefix list check | |
310 | */ | |
311 | if (hc->plist_redist[ZEBRA_ROUTE_BGP_DIRECT][afi]) { | |
312 | vnc_zlog_debug_verbose("%s: HC prefix list is set, checking", | |
313 | __func__); | |
314 | if (prefix_list_apply( | |
315 | hc->plist_redist[ZEBRA_ROUTE_BGP_DIRECT][afi], | |
316 | prefix) | |
317 | == PREFIX_DENY) { | |
318 | vnc_zlog_debug_verbose( | |
319 | "%s: prefix list returns DENY, blocking route", | |
320 | __func__); | |
321 | return -1; | |
322 | } | |
323 | vnc_zlog_debug_verbose( | |
324 | "%s: prefix list returns PASS, allowing route", | |
325 | __func__); | |
326 | } | |
327 | ||
328 | /* apply routemap, if any, later */ | |
329 | rmap = hc->routemap_redist[ZEBRA_ROUTE_BGP_DIRECT]; | |
330 | ||
331 | /* | |
332 | * Extract original nexthop, which we expect to be a NVE connected | |
333 | * router | |
334 | * Note that this is the nexthop before any possible application of | |
335 | * policy | |
336 | */ | |
337 | /* | |
338 | * Incoming prefix is unicast. If v6, it is in multiprotocol area, | |
339 | * but if v4 it is in attr->nexthop | |
340 | */ | |
341 | rfapiUnicastNexthop2Prefix(afi, attr, &pfx_orig_nexthop); | |
342 | ||
343 | /* | |
344 | * route map handling | |
345 | * This code is here because it allocates an interned attr which | |
346 | * must be freed before we return. It's easier to put it after | |
347 | * all of the possible returns above. | |
348 | */ | |
349 | memset(&hattr, 0, sizeof(struct attr)); | |
6f4f49b2 QY |
350 | /* hattr becomes a ghost attr */ |
351 | hattr = *attr; | |
d62a17ae | 352 | |
353 | if (rmap) { | |
4b7e6066 | 354 | struct bgp_path_info info; |
d62a17ae | 355 | route_map_result_t ret; |
356 | ||
357 | memset(&info, 0, sizeof(info)); | |
358 | info.peer = peer; | |
359 | info.attr = &hattr; | |
360 | ret = route_map_apply(rmap, prefix, RMAP_BGP, &info); | |
361 | if (ret == RMAP_DENYMATCH) { | |
362 | bgp_attr_flush(&hattr); | |
363 | vnc_zlog_debug_verbose( | |
364 | "%s: route map \"%s\" says DENY, returning", | |
365 | __func__, rmap->name); | |
366 | return -1; | |
367 | } | |
368 | } | |
369 | ||
370 | /* | |
371 | * Get the (possibly altered by policy) unicast nexthop | |
372 | * for later lookup in the Import Table by caller | |
373 | */ | |
374 | rfapiUnicastNexthop2Prefix(afi, &hattr, unicast_nexthop); | |
375 | ||
376 | if (hattr.ecommunity) | |
377 | *ecom = ecommunity_dup(hattr.ecommunity); | |
378 | else | |
379 | *ecom = ecommunity_new(); | |
380 | ||
381 | /* | |
382 | * Done with hattr, clean up | |
383 | */ | |
384 | bgp_attr_flush(&hattr); | |
385 | ||
386 | /* | |
387 | * Add EC that carries original NH of iBGP route (2 bytes = magic | |
388 | * value indicating it came from an VNC gateway; default 5226, but | |
389 | * must be user configurable). Note that this is the nexthop before | |
390 | * any application of policy. | |
391 | */ | |
392 | { | |
393 | struct ecommunity_val vnc_gateway_magic; | |
394 | uint16_t localadmin; | |
395 | ||
396 | /* Using route origin extended community type */ | |
397 | memset(&vnc_gateway_magic, 0, sizeof(vnc_gateway_magic)); | |
398 | vnc_gateway_magic.val[0] = 0x01; | |
399 | vnc_gateway_magic.val[1] = 0x03; | |
400 | ||
401 | /* Only works for IPv4 nexthops */ | |
402 | if (prefix->family == AF_INET) { | |
403 | memcpy(vnc_gateway_magic.val + 2, | |
404 | &unicast_nexthop->u.prefix4, 4); | |
405 | } | |
406 | localadmin = htons(hc->resolve_nve_roo_local_admin); | |
407 | memcpy(vnc_gateway_magic.val + 6, (char *)&localadmin, 2); | |
408 | ||
1207a5bc | 409 | ecommunity_add_val(*ecom, &vnc_gateway_magic, false, false); |
d62a17ae | 410 | } |
411 | ||
412 | return 0; | |
65efcfce LB |
413 | } |
414 | ||
415 | ||
d62a17ae | 416 | static void vnc_import_bgp_add_route_mode_resolve_nve_one_bi( |
40381db7 DS |
417 | struct bgp *bgp, afi_t afi, struct bgp_path_info *bpi, /* VPN bpi */ |
418 | struct prefix_rd *prd, /* RD */ | |
5a1ae2c2 DS |
419 | const struct prefix *prefix, /* unicast route prefix */ |
420 | uint32_t *local_pref, /* NULL = no local_pref */ | |
421 | uint32_t *med, /* NULL = no med */ | |
422 | struct ecommunity *ecom) /* generated ecoms */ | |
65efcfce | 423 | { |
d62a17ae | 424 | struct prefix un; |
425 | struct prefix nexthop; | |
426 | struct rfapi_ip_addr nexthop_h; | |
427 | uint32_t lifetime; | |
428 | uint32_t *plifetime; | |
429 | struct bgp_attr_encap_subtlv *encaptlvs; | |
430 | uint32_t label = 0; | |
431 | ||
432 | struct rfapi_un_option optary[3]; | |
433 | struct rfapi_un_option *opt = NULL; | |
434 | int cur_opt = 0; | |
65efcfce | 435 | |
d62a17ae | 436 | vnc_zlog_debug_verbose("%s: entry", __func__); |
437 | ||
40381db7 DS |
438 | if (bpi->type != ZEBRA_ROUTE_BGP |
439 | && bpi->type != ZEBRA_ROUTE_BGP_DIRECT) { | |
d62a17ae | 440 | |
441 | return; | |
442 | } | |
40381db7 DS |
443 | if (bpi->sub_type != BGP_ROUTE_NORMAL |
444 | && bpi->sub_type != BGP_ROUTE_STATIC | |
445 | && bpi->sub_type != BGP_ROUTE_RFP) { | |
d62a17ae | 446 | |
447 | return; | |
448 | } | |
40381db7 | 449 | if (CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED)) |
d62a17ae | 450 | return; |
451 | ||
40381db7 DS |
452 | vncHDResolveNve.peer = bpi->peer; |
453 | if (!rfapiGetVncTunnelUnAddr(bpi->attr, &un)) { | |
d62a17ae | 454 | if (rfapiQprefix2Raddr(&un, &vncHDResolveNve.un_addr)) |
455 | return; | |
456 | } else { | |
457 | memset(&vncHDResolveNve.un_addr, 0, | |
458 | sizeof(vncHDResolveNve.un_addr)); | |
459 | } | |
460 | ||
461 | /* Use nexthop of VPN route as nexthop of constructed route */ | |
40381db7 | 462 | rfapiNexthop2Prefix(bpi->attr, &nexthop); |
d62a17ae | 463 | rfapiQprefix2Raddr(&nexthop, &nexthop_h); |
464 | ||
40381db7 | 465 | if (rfapiGetVncLifetime(bpi->attr, &lifetime)) { |
d62a17ae | 466 | plifetime = NULL; |
467 | } else { | |
468 | plifetime = &lifetime; | |
469 | } | |
470 | ||
05864da7 DS |
471 | encaptlvs = bpi->attr->vnc_subtlvs; |
472 | if (bpi->attr->encap_tunneltype != BGP_ENCAP_TYPE_RESERVED | |
473 | && bpi->attr->encap_tunneltype != BGP_ENCAP_TYPE_MPLS) { | |
05864da7 DS |
474 | opt = &optary[cur_opt++]; |
475 | memset(opt, 0, sizeof(struct rfapi_un_option)); | |
476 | opt->type = RFAPI_UN_OPTION_TYPE_TUNNELTYPE; | |
477 | opt->v.tunnel.type = bpi->attr->encap_tunneltype; | |
478 | /* TBD parse bpi->attr->extra->encap_subtlvs */ | |
d62a17ae | 479 | } |
480 | ||
481 | struct ecommunity *new_ecom = ecommunity_dup(ecom); | |
482 | ||
05864da7 | 483 | if (bpi->attr->ecommunity) |
40381db7 | 484 | ecommunity_merge(new_ecom, bpi->attr->ecommunity); |
d62a17ae | 485 | |
40381db7 DS |
486 | if (bpi->extra) |
487 | label = decode_label(&bpi->extra->label[0]); | |
d62a17ae | 488 | |
489 | add_vnc_route(&vncHDResolveNve, bgp, SAFI_MPLS_VPN, | |
490 | prefix, /* unicast route prefix */ | |
491 | prd, &nexthop_h, /* new nexthop */ | |
492 | local_pref, plifetime, | |
493 | (struct bgp_tea_options *)encaptlvs, /* RFP options */ | |
494 | opt, NULL, new_ecom, med, /* NULL => don't set med */ | |
495 | (label ? &label : NULL), /* NULL= default */ | |
496 | ZEBRA_ROUTE_BGP_DIRECT, BGP_ROUTE_REDISTRIBUTE, | |
497 | RFAPI_AHR_RFPOPT_IS_VNCTLV); /* flags */ | |
498 | ||
499 | ecommunity_free(&new_ecom); | |
65efcfce LB |
500 | } |
501 | ||
d62a17ae | 502 | static void vnc_import_bgp_add_route_mode_resolve_nve_one_rd( |
5a1ae2c2 | 503 | struct prefix_rd *prd, /* RD */ |
d62a17ae | 504 | struct bgp_table *table_rd, /* per-rd VPN route table */ |
5a1ae2c2 DS |
505 | afi_t afi, struct bgp *bgp, |
506 | const struct prefix *prefix, /* unicast prefix */ | |
507 | struct ecommunity *ecom, /* generated ecoms */ | |
508 | uint32_t *local_pref, /* NULL = no local_pref */ | |
40381db7 DS |
509 | uint32_t *med, /* NULL = no med */ |
510 | struct prefix *ubpi_nexthop) /* unicast nexthop */ | |
65efcfce | 511 | { |
9bcb3eef | 512 | struct bgp_dest *bd; |
40381db7 | 513 | struct bgp_path_info *bpi; |
65efcfce | 514 | |
d62a17ae | 515 | if (!table_rd) |
516 | return; | |
65efcfce | 517 | |
2dbe669b | 518 | vnc_zlog_debug_verbose("%s: ubpi_nexthop=%pFX", __func__, ubpi_nexthop); |
65efcfce | 519 | |
d62a17ae | 520 | /* exact match */ |
9bcb3eef DS |
521 | bd = bgp_node_lookup(table_rd, ubpi_nexthop); |
522 | if (!bd) { | |
d62a17ae | 523 | vnc_zlog_debug_verbose( |
40381db7 DS |
524 | "%s: no match in RD's table for ubpi_nexthop", |
525 | __func__); | |
d62a17ae | 526 | return; |
527 | } | |
65efcfce | 528 | |
6f94b685 | 529 | /* Iterate over bgp_info items at this node */ |
9bcb3eef | 530 | for (bpi = bgp_dest_get_bgp_path_info(bd); bpi; bpi = bpi->next) { |
65efcfce | 531 | |
d62a17ae | 532 | vnc_import_bgp_add_route_mode_resolve_nve_one_bi( |
40381db7 | 533 | bgp, afi, bpi, /* VPN bpi */ |
d62a17ae | 534 | prd, prefix, local_pref, med, ecom); |
535 | } | |
65efcfce | 536 | |
9bcb3eef | 537 | bgp_dest_unlock_node(bd); |
65efcfce LB |
538 | } |
539 | ||
d62a17ae | 540 | static void vnc_import_bgp_add_route_mode_resolve_nve( |
5a1ae2c2 DS |
541 | struct bgp *bgp, const struct prefix *prefix, /* unicast prefix */ |
542 | struct bgp_path_info *info) /* unicast info */ | |
65efcfce | 543 | { |
d62a17ae | 544 | afi_t afi = family2afi(prefix->family); |
d62a17ae | 545 | |
546 | struct prefix pfx_unicast_nexthop = {0}; /* happy valgrind */ | |
547 | ||
548 | struct ecommunity *ecom = NULL; | |
549 | uint32_t local_pref; | |
550 | uint32_t *med = NULL; | |
551 | ||
552 | struct prefix_bag *pb; | |
9bcb3eef | 553 | struct bgp_dest *bdp; /* prd table node */ |
d62a17ae | 554 | |
555 | /*debugging */ | |
7f88f54a | 556 | if (VNC_DEBUG(VERBOSE)) { |
872ed4c7 | 557 | char str_nh[PREFIX_STRLEN]; |
d62a17ae | 558 | struct prefix nh; |
559 | ||
d62a17ae | 560 | nh.prefixlen = 0; |
561 | rfapiUnicastNexthop2Prefix(afi, info->attr, &nh); | |
562 | if (nh.prefixlen) { | |
872ed4c7 | 563 | prefix2str(&nh, str_nh, sizeof(str_nh)); |
d62a17ae | 564 | } else { |
565 | str_nh[0] = '?'; | |
566 | str_nh[1] = 0; | |
567 | } | |
568 | ||
569 | vnc_zlog_debug_verbose( | |
2dbe669b DA |
570 | "%s(bgp=%p, unicast prefix=%pFX, unicast nh=%s)", |
571 | __func__, bgp, prefix, str_nh); | |
d62a17ae | 572 | } |
573 | ||
574 | if (info->type != ZEBRA_ROUTE_BGP) { | |
575 | vnc_zlog_debug_verbose( | |
576 | "%s: unicast type %d=\"%s\" is not %d=%s, skipping", | |
577 | __func__, info->type, zebra_route_string(info->type), | |
578 | ZEBRA_ROUTE_BGP, "ZEBRA_ROUTE_BGP"); | |
579 | return; | |
580 | } | |
581 | ||
582 | /* | |
583 | * Preliminary checks | |
584 | */ | |
585 | ||
586 | if (!afi) { | |
450971aa | 587 | flog_err(EC_LIB_DEVELOPMENT, "%s: can't get afi of prefix", |
1c50c1c0 | 588 | __func__); |
d62a17ae | 589 | return; |
590 | } | |
591 | ||
3f54c705 | 592 | if (!(bgp->rfapi_cfg)) { |
d62a17ae | 593 | vnc_zlog_debug_verbose("%s: bgp->rfapi_cfg is NULL, skipping", |
594 | __func__); | |
595 | return; | |
596 | } | |
597 | ||
598 | /* check vnc redist flag for bgp direct routes */ | |
599 | if (!bgp->rfapi_cfg->redist[afi][ZEBRA_ROUTE_BGP_DIRECT]) { | |
600 | vnc_zlog_debug_verbose( | |
601 | "%s: bgp->rfapi_cfg->redist[afi=%d][type=ZEBRA_ROUTE_BGP_DIRECT] is 0, skipping", | |
602 | __func__, afi); | |
603 | return; | |
604 | } | |
605 | ||
606 | ||
607 | if (process_unicast_route(bgp, afi, prefix, info, &ecom, | |
608 | &pfx_unicast_nexthop)) { | |
609 | ||
610 | vnc_zlog_debug_verbose( | |
611 | "%s: process_unicast_route error, skipping", __func__); | |
612 | return; | |
613 | } | |
614 | ||
615 | local_pref = calc_local_pref(info->attr, info->peer); | |
05864da7 | 616 | if (info->attr->flag & ATTR_FLAG_BIT(BGP_ATTR_MULTI_EXIT_DISC)) |
d62a17ae | 617 | med = &info->attr->med; |
d62a17ae | 618 | |
619 | /* | |
620 | * At this point, we have allocated: | |
621 | * | |
622 | * ecom ecommunity ptr, union of unicast and ROO parts (no NVE part) | |
623 | * | |
624 | * And we have set: | |
625 | * | |
626 | * pfx_unicast_nexthop nexthop of uncast route | |
627 | */ | |
628 | ||
629 | if (!bgp->rfapi->resolve_nve_nexthop) { | |
630 | bgp->rfapi->resolve_nve_nexthop = | |
631 | skiplist_new(SKIPLIST_FLAG_ALLOW_DUPLICATES, | |
632 | vnc_prefix_cmp, prefix_bag_free); | |
633 | } | |
634 | ||
635 | pb = XCALLOC(MTYPE_RFAPI_PREFIX_BAG, sizeof(struct prefix_bag)); | |
636 | pb->hpfx = pfx_unicast_nexthop; | |
40381db7 | 637 | pb->ubpi = info; |
d62a17ae | 638 | pb->upfx = *prefix; |
639 | ||
18ee8310 | 640 | bgp_path_info_lock(info); /* skiplist refers to it */ |
d62a17ae | 641 | skiplist_insert(bgp->rfapi->resolve_nve_nexthop, &pb->hpfx, pb); |
642 | ||
643 | /* | |
644 | * Iterate over RDs in VPN RIB. For each RD, look up unicast nexthop | |
645 | * (exact match, /32). If an exact match is found, call add_vnc_route. | |
646 | */ | |
647 | ||
9bcb3eef DS |
648 | for (bdp = bgp_table_top(bgp->rib[afi][SAFI_MPLS_VPN]); bdp; |
649 | bdp = bgp_route_next(bdp)) { | |
d62a17ae | 650 | |
651 | struct bgp_table *table; | |
652 | ||
9bcb3eef | 653 | table = bgp_dest_get_bgp_table_info(bdp); |
d62a17ae | 654 | |
655 | if (!table) | |
656 | continue; | |
657 | ||
658 | vnc_import_bgp_add_route_mode_resolve_nve_one_rd( | |
9bcb3eef | 659 | (struct prefix_rd *)bgp_dest_get_prefix(bdp), table, |
b54892e0 DS |
660 | afi, bgp, prefix, ecom, &local_pref, med, |
661 | &pfx_unicast_nexthop); | |
d62a17ae | 662 | } |
663 | ||
664 | ||
665 | if (ecom) | |
666 | ecommunity_free(&ecom); | |
667 | ||
668 | vnc_zlog_debug_verbose("%s: done", __func__); | |
65efcfce LB |
669 | } |
670 | ||
671 | ||
d62a17ae | 672 | static void vnc_import_bgp_add_route_mode_plain(struct bgp *bgp, |
5a1ae2c2 | 673 | const struct prefix *prefix, |
4b7e6066 | 674 | struct bgp_path_info *info) |
65efcfce | 675 | { |
d62a17ae | 676 | afi_t afi = family2afi(prefix->family); |
677 | struct peer *peer = info->peer; | |
678 | struct attr *attr = info->attr; | |
679 | struct attr hattr; | |
3f54c705 | 680 | struct rfapi_cfg *hc = bgp->rfapi_cfg; |
d62a17ae | 681 | struct attr *iattr = NULL; |
682 | ||
683 | struct rfapi_ip_addr vnaddr; | |
684 | struct prefix vn_pfx_space; | |
685 | struct prefix *vn_pfx = NULL; | |
686 | int ahr_flags = 0; | |
687 | struct ecommunity *ecom = NULL; | |
688 | struct prefix_rd prd; | |
689 | struct route_map *rmap = NULL; | |
690 | uint32_t local_pref; | |
691 | uint32_t *med = NULL; | |
692 | ||
2dbe669b | 693 | vnc_zlog_debug_verbose("%s(prefix=%pFX) entry", __func__, prefix); |
d62a17ae | 694 | |
695 | if (!afi) { | |
450971aa | 696 | flog_err(EC_LIB_DEVELOPMENT, "%s: can't get afi of prefix", |
1c50c1c0 | 697 | __func__); |
d62a17ae | 698 | return; |
699 | } | |
700 | ||
3f54c705 | 701 | if (!hc) { |
d62a17ae | 702 | vnc_zlog_debug_verbose("%s: bgp->rfapi_cfg is NULL, skipping", |
703 | __func__); | |
704 | return; | |
705 | } | |
706 | ||
707 | /* check vnc redist flag for bgp direct routes */ | |
708 | if (!bgp->rfapi_cfg->redist[afi][ZEBRA_ROUTE_BGP_DIRECT]) { | |
709 | vnc_zlog_debug_verbose( | |
710 | "%s: bgp->rfapi_cfg->redist[afi=%d][type=ZEBRA_ROUTE_BGP_DIRECT] is 0, skipping", | |
711 | __func__, afi); | |
712 | return; | |
713 | } | |
714 | ||
715 | /* | |
716 | * mode "plain" specific code | |
717 | */ | |
718 | { | |
719 | vnc_zlog_debug_verbose("%s: NOT using redist RFG", __func__); | |
720 | ||
721 | /* | |
722 | * prefix list check | |
723 | */ | |
724 | if (hc->plist_redist[ZEBRA_ROUTE_BGP_DIRECT][afi]) { | |
725 | vnc_zlog_debug_verbose( | |
726 | "%s: HC prefix list is set, checking", | |
727 | __func__); | |
728 | if (prefix_list_apply( | |
729 | hc->plist_redist[ZEBRA_ROUTE_BGP_DIRECT] | |
730 | [afi], | |
731 | prefix) | |
732 | == PREFIX_DENY) { | |
733 | vnc_zlog_debug_verbose( | |
734 | "%s: prefix list returns DENY, blocking route", | |
735 | __func__); | |
736 | return; | |
737 | } | |
738 | vnc_zlog_debug_verbose( | |
739 | "%s: prefix list returns PASS, allowing route", | |
740 | __func__); | |
741 | } | |
742 | ||
743 | /* apply routemap, if any, later */ | |
744 | rmap = hc->routemap_redist[ZEBRA_ROUTE_BGP_DIRECT]; | |
745 | ||
746 | /* | |
747 | * Incoming prefix is unicast. If v6, it is in multiprotocol | |
748 | * area, | |
749 | * but if v4 it is in attr->nexthop | |
750 | */ | |
751 | rfapiUnicastNexthop2Prefix(afi, attr, &vn_pfx_space); | |
752 | vn_pfx = &vn_pfx_space; | |
753 | ||
754 | /* UN address */ | |
755 | ahr_flags |= RFAPI_AHR_NO_TUNNEL_SUBTLV; | |
756 | } | |
757 | ||
2dbe669b DA |
758 | if (VNC_DEBUG(IMPORT_BGP_ADD_ROUTE)) |
759 | vnc_zlog_debug_any("%s vn_pfx=%pFX", __func__, vn_pfx); | |
d62a17ae | 760 | |
761 | /* | |
762 | * Compute VN address | |
763 | */ | |
764 | if (rfapiQprefix2Raddr(vn_pfx, &vnaddr)) { | |
765 | vnc_zlog_debug_verbose("%s: redist VN invalid, skipping", | |
766 | __func__); | |
767 | return; | |
768 | } | |
769 | ||
770 | /* | |
771 | * route map handling | |
772 | * This code is here because it allocates an interned attr which | |
773 | * must be freed before we return. It's easier to put it after | |
774 | * all of the possible returns above. | |
775 | */ | |
776 | memset(&hattr, 0, sizeof(struct attr)); | |
6f4f49b2 QY |
777 | /* hattr becomes a ghost attr */ |
778 | hattr = *attr; | |
d62a17ae | 779 | |
780 | if (rmap) { | |
4b7e6066 | 781 | struct bgp_path_info info; |
d62a17ae | 782 | route_map_result_t ret; |
783 | ||
784 | memset(&info, 0, sizeof(info)); | |
785 | info.peer = peer; | |
786 | info.attr = &hattr; | |
787 | ret = route_map_apply(rmap, prefix, RMAP_BGP, &info); | |
788 | if (ret == RMAP_DENYMATCH) { | |
789 | bgp_attr_flush(&hattr); | |
790 | vnc_zlog_debug_verbose( | |
791 | "%s: route map \"%s\" says DENY, returning", | |
792 | __func__, rmap->name); | |
793 | return; | |
794 | } | |
795 | } | |
796 | ||
797 | iattr = bgp_attr_intern(&hattr); | |
798 | bgp_attr_flush(&hattr); | |
799 | ||
800 | /* Now iattr is an allocated interned attr */ | |
801 | ||
802 | /* | |
803 | * Mode "plain" specific code | |
804 | * | |
805 | * Sets RD in dummy HD | |
806 | * Allocates ecom | |
807 | */ | |
808 | { | |
809 | if (vnaddr.addr_family != AF_INET) { | |
810 | vnc_zlog_debug_verbose( | |
811 | "%s: can't auto-assign RD, VN AF (%d) is not IPv4, skipping", | |
812 | __func__, vnaddr.addr_family); | |
813 | if (iattr) { | |
814 | bgp_attr_unintern(&iattr); | |
815 | } | |
816 | return; | |
817 | } | |
818 | memset(&prd, 0, sizeof(prd)); | |
819 | rfapi_set_autord_from_vn(&prd, &vnaddr); | |
820 | ||
821 | if (iattr && iattr->ecommunity) | |
822 | ecom = ecommunity_dup(iattr->ecommunity); | |
823 | } | |
824 | ||
825 | local_pref = calc_local_pref(iattr, peer); | |
826 | ||
827 | if (iattr && (iattr->flag & ATTR_FLAG_BIT(BGP_ATTR_MULTI_EXIT_DISC))) { | |
828 | med = &iattr->med; | |
829 | } | |
830 | ||
831 | if (VNC_DEBUG(IMPORT_BGP_ADD_ROUTE)) { | |
872ed4c7 | 832 | char buf[PREFIX_STRLEN]; |
d62a17ae | 833 | |
872ed4c7 | 834 | rfapiRfapiIpAddr2Str(&vnaddr, buf, sizeof(buf)); |
d62a17ae | 835 | vnc_zlog_debug_any("%s: setting vnaddr to %s", __func__, buf); |
836 | } | |
837 | ||
838 | vncHDBgpDirect.peer = peer; | |
839 | add_vnc_route(&vncHDBgpDirect, bgp, SAFI_MPLS_VPN, prefix, &prd, | |
840 | &vnaddr, &local_pref, &(bgp->rfapi_cfg->redist_lifetime), | |
841 | NULL, /* RFP options */ | |
842 | NULL, NULL, ecom, med, /* med */ | |
843 | NULL, /* label: default */ | |
844 | ZEBRA_ROUTE_BGP_DIRECT, BGP_ROUTE_REDISTRIBUTE, | |
845 | ahr_flags); | |
846 | vncHDBgpDirect.peer = NULL; | |
847 | ||
848 | if (ecom) | |
849 | ecommunity_free(&ecom); | |
65efcfce LB |
850 | } |
851 | ||
5a1ae2c2 DS |
852 | static void vnc_import_bgp_add_route_mode_nvegroup( |
853 | struct bgp *bgp, const struct prefix *prefix, | |
854 | struct bgp_path_info *info, struct rfapi_nve_group_cfg *rfg) | |
65efcfce | 855 | { |
d62a17ae | 856 | afi_t afi = family2afi(prefix->family); |
857 | struct peer *peer = info->peer; | |
858 | struct attr *attr = info->attr; | |
859 | struct attr hattr; | |
d62a17ae | 860 | struct attr *iattr = NULL; |
861 | ||
862 | struct rfapi_ip_addr vnaddr; | |
863 | struct prefix *vn_pfx = NULL; | |
864 | int ahr_flags = 0; | |
865 | struct ecommunity *ecom = NULL; | |
866 | struct prefix_rd prd; | |
867 | struct route_map *rmap = NULL; | |
868 | uint32_t local_pref; | |
869 | ||
2dbe669b | 870 | vnc_zlog_debug_verbose("%s(prefix=%pFX) entry", __func__, prefix); |
d62a17ae | 871 | |
872 | assert(rfg); | |
873 | ||
874 | if (!afi) { | |
450971aa | 875 | flog_err(EC_LIB_DEVELOPMENT, "%s: can't get afi of prefix", |
1c50c1c0 | 876 | __func__); |
d62a17ae | 877 | return; |
878 | } | |
879 | ||
3f54c705 | 880 | if (!(bgp->rfapi_cfg)) { |
d62a17ae | 881 | vnc_zlog_debug_verbose("%s: bgp->rfapi_cfg is NULL, skipping", |
882 | __func__); | |
883 | return; | |
884 | } | |
885 | ||
886 | /* check vnc redist flag for bgp direct routes */ | |
887 | if (!bgp->rfapi_cfg->redist[afi][ZEBRA_ROUTE_BGP_DIRECT]) { | |
888 | vnc_zlog_debug_verbose( | |
889 | "%s: bgp->rfapi_cfg->redist[afi=%d][type=ZEBRA_ROUTE_BGP_DIRECT] is 0, skipping", | |
890 | __func__, afi); | |
891 | return; | |
892 | } | |
893 | ||
894 | ||
895 | /* | |
896 | * RFG-specific code | |
897 | */ | |
898 | { | |
899 | ||
900 | struct rfapi_ip_prefix pfx_un; | |
901 | ||
902 | vnc_zlog_debug_verbose("%s: using redist RFG", __func__); | |
903 | ||
904 | /* | |
905 | * RFG prefix list check | |
906 | */ | |
907 | if (rfg->plist_redist[ZEBRA_ROUTE_BGP_DIRECT][afi]) { | |
908 | vnc_zlog_debug_verbose( | |
909 | "%s: RFG prefix list is set, checking", | |
910 | __func__); | |
911 | if (prefix_list_apply( | |
912 | rfg->plist_redist[ZEBRA_ROUTE_BGP_DIRECT] | |
913 | [afi], | |
914 | prefix) | |
915 | == PREFIX_DENY) { | |
916 | vnc_zlog_debug_verbose( | |
917 | "%s: prefix list returns DENY, blocking route", | |
918 | __func__); | |
919 | return; | |
920 | } | |
921 | vnc_zlog_debug_verbose( | |
922 | "%s: prefix list returns PASS, allowing route", | |
923 | __func__); | |
924 | } | |
925 | ||
926 | /* apply routemap, if any, later */ | |
927 | rmap = rfg->routemap_redist[ZEBRA_ROUTE_BGP_DIRECT]; | |
928 | ||
929 | /* | |
930 | * export nve group's VN addr prefix must be a /32 which | |
931 | * will yield the VN addr to use | |
932 | */ | |
933 | vn_pfx = &rfg->vn_prefix; | |
934 | ||
935 | /* | |
936 | * UN Address | |
937 | */ | |
938 | if (!is_host_prefix(&rfg->un_prefix)) { | |
939 | /* NB prefixlen==0 means it has not been configured */ | |
940 | vnc_zlog_debug_verbose( | |
941 | "%s: redist RFG UN pfx not host pfx (plen=%d), skipping", | |
942 | __func__, rfg->un_prefix.prefixlen); | |
943 | return; | |
944 | } | |
945 | ||
946 | rfapiQprefix2Rprefix(&rfg->un_prefix, &pfx_un); | |
947 | ||
948 | vncHDBgpDirect.un_addr = pfx_un.prefix; | |
949 | } | |
950 | ||
2dbe669b DA |
951 | if (VNC_DEBUG(IMPORT_BGP_ADD_ROUTE)) |
952 | vnc_zlog_debug_any("%s vn_pfx=%pFX", __func__, vn_pfx); | |
d62a17ae | 953 | |
954 | /* | |
955 | * Compute VN address | |
956 | */ | |
957 | if (rfapiQprefix2Raddr(vn_pfx, &vnaddr)) { | |
958 | vnc_zlog_debug_verbose("%s: redist VN invalid, skipping", | |
959 | __func__); | |
960 | return; | |
961 | } | |
962 | ||
963 | /* | |
964 | * route map handling | |
965 | * This code is here because it allocates an interned attr which | |
966 | * must be freed before we return. It's easier to put it after | |
967 | * all of the possible returns above. | |
968 | */ | |
969 | memset(&hattr, 0, sizeof(struct attr)); | |
6f4f49b2 QY |
970 | /* hattr becomes a ghost attr */ |
971 | hattr = *attr; | |
d62a17ae | 972 | |
973 | if (rmap) { | |
9b6d8fcf | 974 | struct bgp_path_info path; |
d62a17ae | 975 | route_map_result_t ret; |
976 | ||
9b6d8fcf DS |
977 | memset(&path, 0, sizeof(path)); |
978 | path.peer = peer; | |
979 | path.attr = &hattr; | |
980 | ret = route_map_apply(rmap, prefix, RMAP_BGP, &path); | |
d62a17ae | 981 | if (ret == RMAP_DENYMATCH) { |
982 | bgp_attr_flush(&hattr); | |
983 | vnc_zlog_debug_verbose( | |
984 | "%s: route map \"%s\" says DENY, returning", | |
985 | __func__, rmap->name); | |
986 | return; | |
987 | } | |
988 | } | |
989 | ||
990 | iattr = bgp_attr_intern(&hattr); | |
991 | bgp_attr_flush(&hattr); | |
992 | ||
993 | /* Now iattr is an allocated interned attr */ | |
994 | ||
995 | /* | |
996 | * RFG-specific code | |
997 | * | |
998 | * Sets RD in dummy HD | |
999 | * Allocates ecom | |
1000 | */ | |
1001 | { | |
1002 | ||
1003 | memset(&prd, 0, sizeof(prd)); | |
1004 | prd = rfg->rd; | |
1005 | prd.family = AF_UNSPEC; | |
1006 | prd.prefixlen = 64; | |
1007 | ||
1008 | if (rfg->rd.family == AF_UNIX) { | |
1009 | rfapi_set_autord_from_vn(&prd, &vnaddr); | |
1010 | } | |
1011 | ||
1012 | if (rfg->rt_export_list) | |
1013 | ecom = ecommunity_dup( | |
1014 | bgp->rfapi_cfg->rfg_redist->rt_export_list); | |
1015 | else | |
1016 | ecom = ecommunity_new(); | |
1017 | ||
1018 | if (iattr && iattr->ecommunity) | |
1019 | ecom = ecommunity_merge(ecom, iattr->ecommunity); | |
1020 | } | |
1021 | ||
1022 | local_pref = calc_local_pref(iattr, peer); | |
1023 | ||
1024 | if (VNC_DEBUG(IMPORT_BGP_ADD_ROUTE)) { | |
1025 | char buf[BUFSIZ]; | |
1026 | ||
1027 | buf[0] = 0; | |
1028 | rfapiRfapiIpAddr2Str(&vnaddr, buf, BUFSIZ); | |
1029 | buf[BUFSIZ - 1] = 0; | |
1030 | vnc_zlog_debug_any("%s: setting vnaddr to %s", __func__, buf); | |
1031 | } | |
1032 | ||
1033 | vncHDBgpDirect.peer = peer; | |
1034 | add_vnc_route(&vncHDBgpDirect, bgp, SAFI_MPLS_VPN, prefix, &prd, | |
1035 | &vnaddr, &local_pref, &(bgp->rfapi_cfg->redist_lifetime), | |
1036 | NULL, /* RFP options */ | |
1037 | NULL, NULL, ecom, NULL, /* med */ | |
1038 | NULL, /* label: default */ | |
1039 | ZEBRA_ROUTE_BGP_DIRECT, BGP_ROUTE_REDISTRIBUTE, | |
1040 | ahr_flags); | |
1041 | vncHDBgpDirect.peer = NULL; | |
1042 | ||
1043 | if (ecom) | |
1044 | ecommunity_free(&ecom); | |
65efcfce LB |
1045 | } |
1046 | ||
d62a17ae | 1047 | static void vnc_import_bgp_del_route_mode_plain(struct bgp *bgp, |
5a1ae2c2 | 1048 | const struct prefix *prefix, |
4b7e6066 | 1049 | struct bgp_path_info *info) |
65efcfce | 1050 | { |
d62a17ae | 1051 | struct prefix_rd prd; |
1052 | afi_t afi = family2afi(prefix->family); | |
1053 | struct prefix *vn_pfx = NULL; | |
1054 | struct rfapi_ip_addr vnaddr; | |
1055 | struct prefix vn_pfx_space; | |
1056 | ||
1057 | ||
1058 | assert(afi); | |
1059 | ||
1060 | /* | |
1061 | * Compute VN address | |
1062 | */ | |
1063 | ||
05864da7 | 1064 | if (info) { |
d62a17ae | 1065 | rfapiUnicastNexthop2Prefix(afi, info->attr, &vn_pfx_space); |
1066 | } else { | |
1067 | vnc_zlog_debug_verbose("%s: no attr, can't delete route", | |
1068 | __func__); | |
1069 | return; | |
1070 | } | |
1071 | vn_pfx = &vn_pfx_space; | |
1072 | ||
1073 | vnaddr.addr_family = vn_pfx->family; | |
1074 | switch (vn_pfx->family) { | |
1075 | case AF_INET: | |
1076 | if (vn_pfx->prefixlen != 32) { | |
1077 | vnc_zlog_debug_verbose( | |
1078 | "%s: redist VN plen (%d) != 32, skipping", | |
1079 | __func__, vn_pfx->prefixlen); | |
1080 | return; | |
1081 | } | |
1082 | vnaddr.addr.v4 = vn_pfx->u.prefix4; | |
1083 | break; | |
1084 | ||
1085 | case AF_INET6: | |
1086 | if (vn_pfx->prefixlen != 128) { | |
1087 | vnc_zlog_debug_verbose( | |
1088 | "%s: redist VN plen (%d) != 128, skipping", | |
1089 | __func__, vn_pfx->prefixlen); | |
1090 | return; | |
1091 | } | |
1092 | vnaddr.addr.v6 = vn_pfx->u.prefix6; | |
1093 | break; | |
1094 | ||
1095 | default: | |
1096 | vnc_zlog_debug_verbose( | |
1097 | "%s: no redist RFG VN host pfx configured, skipping", | |
1098 | __func__); | |
1099 | return; | |
1100 | } | |
1101 | ||
1102 | ||
1103 | memset(&prd, 0, sizeof(prd)); | |
1104 | if (rfapi_set_autord_from_vn(&prd, &vnaddr)) { | |
1105 | vnc_zlog_debug_verbose("%s: can't auto-assign RD, skipping", | |
1106 | __func__); | |
1107 | return; | |
1108 | } | |
1109 | ||
1110 | vncHDBgpDirect.peer = info->peer; | |
1111 | vnc_zlog_debug_verbose("%s: setting peer to %p", __func__, | |
1112 | vncHDBgpDirect.peer); | |
1113 | del_vnc_route(&vncHDBgpDirect, info->peer, bgp, SAFI_MPLS_VPN, prefix, | |
1114 | &prd, ZEBRA_ROUTE_BGP_DIRECT, BGP_ROUTE_REDISTRIBUTE, | |
1115 | NULL, 1); | |
1116 | ||
1117 | vncHDBgpDirect.peer = NULL; | |
65efcfce LB |
1118 | } |
1119 | ||
d62a17ae | 1120 | static void vnc_import_bgp_del_route_mode_nvegroup(struct bgp *bgp, |
5a1ae2c2 | 1121 | const struct prefix *prefix, |
4b7e6066 | 1122 | struct bgp_path_info *info) |
65efcfce | 1123 | { |
d62a17ae | 1124 | struct prefix_rd prd; |
1125 | afi_t afi = family2afi(prefix->family); | |
1126 | struct rfapi_nve_group_cfg *rfg = NULL; | |
1127 | struct prefix *vn_pfx = NULL; | |
1128 | struct rfapi_ip_addr vnaddr; | |
1129 | ||
1130 | ||
1131 | assert(afi); | |
1132 | ||
2ad7c8ec DS |
1133 | rfg = bgp->rfapi_cfg->rfg_redist; |
1134 | assert(rfg); | |
d62a17ae | 1135 | |
1136 | /* | |
1137 | * Compute VN address | |
1138 | */ | |
1139 | ||
1140 | /* | |
1141 | * export nve group's VN addr prefix must be a /32 which | |
1142 | * will yield the VN addr to use | |
1143 | */ | |
1144 | vn_pfx = &rfg->vn_prefix; | |
1145 | ||
1146 | ||
1147 | vnaddr.addr_family = vn_pfx->family; | |
1148 | switch (vn_pfx->family) { | |
1149 | case AF_INET: | |
1150 | if (vn_pfx->prefixlen != 32) { | |
1151 | vnc_zlog_debug_verbose( | |
1152 | "%s: redist VN plen (%d) != 32, skipping", | |
1153 | __func__, vn_pfx->prefixlen); | |
1154 | return; | |
1155 | } | |
1156 | vnaddr.addr.v4 = vn_pfx->u.prefix4; | |
1157 | break; | |
1158 | ||
1159 | case AF_INET6: | |
1160 | if (vn_pfx->prefixlen != 128) { | |
1161 | vnc_zlog_debug_verbose( | |
1162 | "%s: redist VN plen (%d) != 128, skipping", | |
1163 | __func__, vn_pfx->prefixlen); | |
1164 | return; | |
1165 | } | |
1166 | vnaddr.addr.v6 = vn_pfx->u.prefix6; | |
1167 | break; | |
1168 | ||
1169 | default: | |
1170 | vnc_zlog_debug_verbose( | |
1171 | "%s: no redist RFG VN host pfx configured, skipping", | |
1172 | __func__); | |
1173 | return; | |
1174 | } | |
1175 | ||
1176 | memset(&prd, 0, sizeof(prd)); | |
1177 | prd = rfg->rd; | |
1178 | prd.family = AF_UNSPEC; | |
1179 | prd.prefixlen = 64; | |
1180 | ||
1181 | if (rfg->rd.family == AF_UNIX) { | |
1182 | /* means "auto" with VN addr */ | |
1183 | if (rfapi_set_autord_from_vn(&prd, &vnaddr)) { | |
1184 | vnc_zlog_debug_verbose( | |
1185 | "%s: can't auto-assign RD, skipping", __func__); | |
1186 | return; | |
1187 | } | |
1188 | } | |
1189 | ||
1190 | ||
1191 | vncHDBgpDirect.peer = info->peer; | |
1192 | vnc_zlog_debug_verbose("%s: setting peer to %p", __func__, | |
1193 | vncHDBgpDirect.peer); | |
1194 | del_vnc_route(&vncHDBgpDirect, info->peer, bgp, SAFI_MPLS_VPN, prefix, | |
1195 | &prd, ZEBRA_ROUTE_BGP_DIRECT, BGP_ROUTE_REDISTRIBUTE, | |
1196 | NULL, 1); | |
1197 | ||
1198 | vncHDBgpDirect.peer = NULL; | |
65efcfce LB |
1199 | } |
1200 | ||
d62a17ae | 1201 | static void vnc_import_bgp_del_route_mode_resolve_nve_one_bi( |
40381db7 DS |
1202 | struct bgp *bgp, afi_t afi, struct bgp_path_info *bpi, /* VPN bpi */ |
1203 | struct prefix_rd *prd, /* RD */ | |
5a1ae2c2 | 1204 | const struct prefix *prefix) /* unicast route prefix */ |
65efcfce | 1205 | { |
d62a17ae | 1206 | struct prefix un; |
1207 | ||
40381db7 DS |
1208 | if (bpi->type != ZEBRA_ROUTE_BGP |
1209 | && bpi->type != ZEBRA_ROUTE_BGP_DIRECT) { | |
65efcfce | 1210 | |
d62a17ae | 1211 | return; |
1212 | } | |
40381db7 DS |
1213 | if (bpi->sub_type != BGP_ROUTE_NORMAL |
1214 | && bpi->sub_type != BGP_ROUTE_STATIC | |
1215 | && bpi->sub_type != BGP_ROUTE_RFP) { | |
d62a17ae | 1216 | |
1217 | return; | |
1218 | } | |
40381db7 | 1219 | if (CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED)) |
d62a17ae | 1220 | return; |
1221 | ||
40381db7 DS |
1222 | vncHDResolveNve.peer = bpi->peer; |
1223 | if (!rfapiGetVncTunnelUnAddr(bpi->attr, &un)) { | |
d62a17ae | 1224 | if (rfapiQprefix2Raddr(&un, &vncHDResolveNve.un_addr)) |
1225 | return; | |
1226 | } else { | |
1227 | memset(&vncHDResolveNve.un_addr, 0, | |
1228 | sizeof(vncHDResolveNve.un_addr)); | |
1229 | } | |
1230 | ||
1231 | del_vnc_route(&vncHDResolveNve, vncHDResolveNve.peer, bgp, | |
1232 | SAFI_MPLS_VPN, prefix, /* unicast route prefix */ | |
1233 | prd, ZEBRA_ROUTE_BGP_DIRECT, BGP_ROUTE_REDISTRIBUTE, NULL, | |
1234 | 0); /* flags */ | |
65efcfce LB |
1235 | } |
1236 | ||
d62a17ae | 1237 | static void vnc_import_bgp_del_route_mode_resolve_nve_one_rd( |
1238 | struct prefix_rd *prd, | |
1239 | struct bgp_table *table_rd, /* per-rd VPN route table */ | |
5a1ae2c2 DS |
1240 | afi_t afi, struct bgp *bgp, |
1241 | const struct prefix *prefix, /* unicast prefix */ | |
1242 | const struct prefix *ubpi_nexthop) /* unicast bpi's nexthop */ | |
65efcfce | 1243 | { |
9bcb3eef | 1244 | struct bgp_dest *bd; |
40381db7 | 1245 | struct bgp_path_info *bpi; |
65efcfce | 1246 | |
d62a17ae | 1247 | if (!table_rd) |
1248 | return; | |
65efcfce | 1249 | |
2dbe669b | 1250 | vnc_zlog_debug_verbose("%s: ubpi_nexthop=%pFX", __func__, ubpi_nexthop); |
65efcfce LB |
1251 | |
1252 | ||
d62a17ae | 1253 | /* exact match */ |
9bcb3eef DS |
1254 | bd = bgp_node_lookup(table_rd, ubpi_nexthop); |
1255 | if (!bd) { | |
d62a17ae | 1256 | vnc_zlog_debug_verbose( |
40381db7 DS |
1257 | "%s: no match in RD's table for ubpi_nexthop", |
1258 | __func__); | |
d62a17ae | 1259 | return; |
1260 | } | |
65efcfce | 1261 | |
6f94b685 | 1262 | /* Iterate over bgp_info items at this node */ |
9bcb3eef | 1263 | for (bpi = bgp_dest_get_bgp_path_info(bd); bpi; bpi = bpi->next) { |
65efcfce | 1264 | |
d62a17ae | 1265 | vnc_import_bgp_del_route_mode_resolve_nve_one_bi( |
40381db7 DS |
1266 | bgp, afi, bpi, /* VPN bpi */ |
1267 | prd, /* VPN RD */ | |
1268 | prefix); /* unicast route prefix */ | |
d62a17ae | 1269 | } |
65efcfce | 1270 | |
9bcb3eef | 1271 | bgp_dest_unlock_node(bd); |
65efcfce LB |
1272 | } |
1273 | ||
4b7e6066 DS |
1274 | static void |
1275 | vnc_import_bgp_del_route_mode_resolve_nve(struct bgp *bgp, afi_t afi, | |
5a1ae2c2 | 1276 | const struct prefix *prefix, |
4b7e6066 | 1277 | struct bgp_path_info *info) |
65efcfce | 1278 | { |
d62a17ae | 1279 | struct ecommunity *ecom = NULL; |
1280 | struct prefix pfx_unicast_nexthop = {0}; /* happy valgrind */ | |
1281 | ||
1282 | // struct listnode *hnode; | |
1283 | // struct rfapi_descriptor *rfd; | |
1284 | struct prefix_bag *pb; | |
1285 | void *cursor; | |
1286 | struct skiplist *sl = bgp->rfapi->resolve_nve_nexthop; | |
1287 | int rc; | |
9bcb3eef | 1288 | struct bgp_dest *bdp; /* prd table node */ |
d62a17ae | 1289 | |
1290 | if (!sl) { | |
1291 | vnc_zlog_debug_verbose("%s: no RHN entries, skipping", | |
1292 | __func__); | |
1293 | return; | |
1294 | } | |
65efcfce | 1295 | |
d62a17ae | 1296 | if (info->type != ZEBRA_ROUTE_BGP) { |
1297 | vnc_zlog_debug_verbose( | |
1298 | "%s: unicast type %d=\"%s\" is not %d=%s, skipping", | |
1299 | __func__, info->type, zebra_route_string(info->type), | |
1300 | ZEBRA_ROUTE_BGP, "ZEBRA_ROUTE_BGP"); | |
1301 | return; | |
1302 | } | |
65efcfce | 1303 | |
d62a17ae | 1304 | if (process_unicast_route(bgp, afi, prefix, info, &ecom, |
1305 | &pfx_unicast_nexthop)) { | |
1306 | ||
1307 | vnc_zlog_debug_verbose( | |
1308 | "%s: process_unicast_route error, skipping", __func__); | |
1309 | return; | |
1310 | } | |
1311 | ||
1312 | rc = skiplist_first_value(sl, &pfx_unicast_nexthop, (void *)&pb, | |
1313 | &cursor); | |
1314 | while (!rc) { | |
40381db7 | 1315 | if (pb->ubpi == info) { |
d62a17ae | 1316 | skiplist_delete(sl, &pfx_unicast_nexthop, pb); |
18ee8310 | 1317 | bgp_path_info_unlock(info); |
d62a17ae | 1318 | break; |
1319 | } | |
1320 | rc = skiplist_next_value(sl, &pfx_unicast_nexthop, (void *)&pb, | |
1321 | &cursor); | |
1322 | } | |
1323 | ||
1324 | /* | |
1325 | * Iterate over RDs in VPN RIB. For each RD, look up unicast nexthop | |
1326 | * (exact match, /32). If an exact match is found, call add_vnc_route. | |
1327 | */ | |
1328 | ||
9bcb3eef DS |
1329 | for (bdp = bgp_table_top(bgp->rib[afi][SAFI_MPLS_VPN]); bdp; |
1330 | bdp = bgp_route_next(bdp)) { | |
d62a17ae | 1331 | |
1332 | struct bgp_table *table; | |
1333 | ||
9bcb3eef | 1334 | table = bgp_dest_get_bgp_table_info(bdp); |
d62a17ae | 1335 | |
1336 | if (!table) | |
1337 | continue; | |
1338 | ||
1339 | vnc_import_bgp_del_route_mode_resolve_nve_one_rd( | |
9bcb3eef | 1340 | (struct prefix_rd *)bgp_dest_get_prefix(bdp), table, |
b54892e0 | 1341 | afi, bgp, prefix, &pfx_unicast_nexthop); |
d62a17ae | 1342 | } |
1343 | ||
1344 | if (ecom) | |
1345 | ecommunity_free(&ecom); | |
1346 | } | |
65efcfce LB |
1347 | |
1348 | ||
1349 | /*********************************************************************** | |
1350 | * Add/Delete CE->NVE routes | |
1351 | ***********************************************************************/ | |
1352 | ||
1353 | /* | |
40381db7 | 1354 | * Should be called whan a bpi is added to VPN RIB. This function |
65efcfce LB |
1355 | * will check if it is a host route and return immediately if not. |
1356 | */ | |
d62a17ae | 1357 | void vnc_import_bgp_add_vnc_host_route_mode_resolve_nve( |
1358 | struct bgp *bgp, struct prefix_rd *prd, /* RD */ | |
1359 | struct bgp_table *table_rd, /* per-rd VPN route table */ | |
5a1ae2c2 | 1360 | const struct prefix *prefix, /* VPN prefix */ |
40381db7 | 1361 | struct bgp_path_info *bpi) /* new VPN host route */ |
65efcfce | 1362 | { |
d62a17ae | 1363 | afi_t afi = family2afi(prefix->family); |
1364 | struct skiplist *sl = NULL; | |
1365 | int rc; | |
1366 | struct prefix_bag *pb; | |
1367 | void *cursor; | |
1368 | struct rfapi_cfg *hc = NULL; | |
1369 | ||
1370 | vnc_zlog_debug_verbose("%s: entry", __func__); | |
1371 | ||
1372 | if (afi != AFI_IP && afi != AFI_IP6) { | |
1373 | vnc_zlog_debug_verbose("%s: bad afi %d, skipping", __func__, | |
1374 | afi); | |
1375 | return; | |
1376 | } | |
1377 | ||
1378 | if (!(hc = bgp->rfapi_cfg)) { | |
1379 | vnc_zlog_debug_verbose("%s: bgp->rfapi_cfg is NULL, skipping", | |
1380 | __func__); | |
1381 | return; | |
1382 | } | |
65efcfce | 1383 | |
d62a17ae | 1384 | /* check vnc redist flag for bgp direct routes */ |
1385 | if (!hc->redist[afi][ZEBRA_ROUTE_BGP_DIRECT]) { | |
1386 | vnc_zlog_debug_verbose( | |
1387 | "%s: bgp->rfapi_cfg->redist[afi=%d][type=ZEBRA_ROUTE_BGP_DIRECT] is 0, skipping", | |
1388 | __func__, afi); | |
1389 | return; | |
1390 | } | |
65efcfce | 1391 | |
d62a17ae | 1392 | if (hc->redist_mode != VNC_REDIST_MODE_RESOLVE_NVE) { |
1393 | vnc_zlog_debug_verbose("%s: not in resolve-nve mode, skipping", | |
1394 | __func__); | |
1395 | return; | |
65efcfce LB |
1396 | } |
1397 | ||
8cea9547 | 1398 | if (bgp->rfapi) |
d62a17ae | 1399 | sl = bgp->rfapi->resolve_nve_nexthop; |
1400 | ||
1401 | if (!sl) { | |
1402 | vnc_zlog_debug_verbose( | |
1403 | "%s: no resolve_nve_nexthop skiplist, skipping", | |
1404 | __func__); | |
1405 | return; | |
1406 | } | |
1407 | ||
1408 | if (!is_host_prefix(prefix)) { | |
1409 | vnc_zlog_debug_verbose("%s: not host prefix, skipping", | |
1410 | __func__); | |
1411 | return; | |
1412 | } | |
1413 | ||
1414 | rc = skiplist_first_value(sl, prefix, (void *)&pb, &cursor); | |
1415 | while (!rc) { | |
1416 | struct ecommunity *ecom; | |
1417 | struct prefix pfx_unicast_nexthop; | |
1418 | uint32_t *med = NULL; | |
1419 | uint32_t local_pref; | |
1420 | ||
1421 | memset(&pfx_unicast_nexthop, 0, | |
1422 | sizeof(struct prefix)); /* keep valgrind happy */ | |
1423 | ||
2dbe669b | 1424 | if (VNC_DEBUG(IMPORT_BGP_ADD_ROUTE)) |
d62a17ae | 1425 | vnc_zlog_debug_any( |
2dbe669b DA |
1426 | "%s: examining RHN Entry (q=%p): upfx=%pFX, hpfx=%pFX, ubpi=%p", |
1427 | __func__, cursor, &pb->upfx, &pb->hpfx, | |
1428 | pb->ubpi); | |
65efcfce | 1429 | |
40381db7 | 1430 | if (process_unicast_route(bgp, afi, &pb->upfx, pb->ubpi, &ecom, |
d62a17ae | 1431 | &pfx_unicast_nexthop)) { |
65efcfce | 1432 | |
d62a17ae | 1433 | vnc_zlog_debug_verbose( |
1434 | "%s: process_unicast_route error, skipping", | |
1435 | __func__); | |
1436 | continue; | |
1437 | } | |
40381db7 | 1438 | local_pref = calc_local_pref(pb->ubpi->attr, pb->ubpi->peer); |
65efcfce | 1439 | |
05864da7 DS |
1440 | if (pb->ubpi->attr->flag |
1441 | & ATTR_FLAG_BIT(BGP_ATTR_MULTI_EXIT_DISC)) | |
40381db7 | 1442 | med = &pb->ubpi->attr->med; |
65efcfce | 1443 | |
d62a17ae | 1444 | /* |
1445 | * Sanity check | |
1446 | */ | |
1447 | if (vnc_prefix_cmp(&pfx_unicast_nexthop, prefix)) { | |
d62a17ae | 1448 | vnc_zlog_debug_verbose( |
2dbe669b DA |
1449 | "%s: FATAL: resolve_nve_nexthop list item bpi nexthop %pFX != nve pfx %pFX", |
1450 | __func__, &pfx_unicast_nexthop, prefix); | |
d62a17ae | 1451 | assert(0); |
1452 | } | |
1453 | ||
1454 | vnc_import_bgp_add_route_mode_resolve_nve_one_bi( | |
40381db7 | 1455 | bgp, afi, bpi, /* VPN bpi */ |
d62a17ae | 1456 | prd, &pb->upfx, /* unicast prefix */ |
1457 | &local_pref, med, ecom); | |
1458 | ||
1459 | if (ecom) | |
1460 | ecommunity_free(&ecom); | |
65efcfce LB |
1461 | |
1462 | #if DEBUG_RHN_LIST | |
d62a17ae | 1463 | /* debug */ |
1464 | { | |
d62a17ae | 1465 | vnc_zlog_debug_verbose( |
2dbe669b DA |
1466 | "%s: advancing past RHN Entry (q=%p): with prefix %pFX", |
1467 | __func__, cursor, prefix); | |
d62a17ae | 1468 | print_rhn_list(__func__, NULL); /* debug */ |
1469 | } | |
65efcfce | 1470 | #endif |
d62a17ae | 1471 | rc = skiplist_next_value(sl, prefix, (void *)&pb, &cursor); |
1472 | } | |
1473 | vnc_zlog_debug_verbose("%s: done", __func__); | |
65efcfce LB |
1474 | } |
1475 | ||
1476 | ||
d62a17ae | 1477 | void vnc_import_bgp_del_vnc_host_route_mode_resolve_nve( |
1478 | struct bgp *bgp, struct prefix_rd *prd, /* RD */ | |
1479 | struct bgp_table *table_rd, /* per-rd VPN route table */ | |
5a1ae2c2 | 1480 | const struct prefix *prefix, /* VPN prefix */ |
40381db7 | 1481 | struct bgp_path_info *bpi) /* old VPN host route */ |
65efcfce | 1482 | { |
d62a17ae | 1483 | afi_t afi = family2afi(prefix->family); |
1484 | struct skiplist *sl = NULL; | |
1485 | struct prefix_bag *pb; | |
1486 | void *cursor; | |
1487 | struct rfapi_cfg *hc = NULL; | |
1488 | int rc; | |
1489 | ||
2dbe669b DA |
1490 | vnc_zlog_debug_verbose("%s(bgp=%p, nve prefix=%pFX)", __func__, bgp, |
1491 | prefix); | |
d62a17ae | 1492 | |
1493 | if (afi != AFI_IP && afi != AFI_IP6) | |
1494 | return; | |
1495 | ||
1496 | if (!(hc = bgp->rfapi_cfg)) { | |
1497 | vnc_zlog_debug_verbose("%s: bgp->rfapi_cfg is NULL, skipping", | |
1498 | __func__); | |
1499 | return; | |
1500 | } | |
1501 | ||
1502 | /* check vnc redist flag for bgp direct routes */ | |
1503 | if (!hc->redist[afi][ZEBRA_ROUTE_BGP_DIRECT]) { | |
1504 | vnc_zlog_debug_verbose( | |
1505 | "%s: bgp->rfapi_cfg->redist[afi=%d][type=ZEBRA_ROUTE_BGP_DIRECT] is 0, skipping", | |
1506 | __func__, afi); | |
1507 | return; | |
1508 | } | |
1509 | ||
1510 | if (hc->redist_mode != VNC_REDIST_MODE_RESOLVE_NVE) { | |
1511 | vnc_zlog_debug_verbose("%s: not in resolve-nve mode, skipping", | |
1512 | __func__); | |
1513 | return; | |
1514 | } | |
1515 | ||
8cea9547 | 1516 | if (bgp->rfapi) |
d62a17ae | 1517 | sl = bgp->rfapi->resolve_nve_nexthop; |
1518 | ||
1519 | if (!sl) { | |
1520 | vnc_zlog_debug_verbose("%s: no RHN entries, skipping", | |
1521 | __func__); | |
1522 | return; | |
1523 | } | |
1524 | ||
1525 | if (!is_host_prefix(prefix)) { | |
1526 | vnc_zlog_debug_verbose("%s: not host route, skip", __func__); | |
1527 | return; | |
1528 | } | |
1529 | ||
1530 | /* | |
1531 | * Find all entries with key == CE in the RHN list | |
1532 | */ | |
1533 | rc = skiplist_first_value(sl, prefix, (void *)&pb, &cursor); | |
1534 | while (!rc) { | |
1535 | ||
1536 | struct ecommunity *ecom; | |
1537 | struct prefix pfx_unicast_nexthop; | |
1538 | ||
1539 | memset(&pfx_unicast_nexthop, 0, | |
1540 | sizeof(struct prefix)); /* keep valgrind happy */ | |
1541 | ||
40381db7 | 1542 | if (process_unicast_route(bgp, afi, &pb->upfx, pb->ubpi, &ecom, |
d62a17ae | 1543 | &pfx_unicast_nexthop)) { |
1544 | ||
1545 | vnc_zlog_debug_verbose( | |
1546 | "%s: process_unicast_route error, skipping", | |
1547 | __func__); | |
1548 | continue; | |
1549 | } | |
1550 | ||
1551 | /* | |
1552 | * Sanity check | |
1553 | */ | |
1554 | if (vnc_prefix_cmp(&pfx_unicast_nexthop, prefix)) { | |
d62a17ae | 1555 | vnc_zlog_debug_verbose( |
2dbe669b DA |
1556 | "%s: FATAL: resolve_nve_nexthop list item bpi nexthop %pFX != nve pfx %pFX", |
1557 | __func__, &pfx_unicast_nexthop, prefix); | |
d62a17ae | 1558 | assert(0); |
1559 | } | |
1560 | ||
1561 | vnc_import_bgp_del_route_mode_resolve_nve_one_bi( | |
40381db7 | 1562 | bgp, afi, bpi, prd, &pb->upfx); |
d62a17ae | 1563 | |
1564 | if (ecom) | |
1565 | ecommunity_free(&ecom); | |
1566 | ||
1567 | rc = skiplist_next_value(sl, prefix, (void *)&pb, &cursor); | |
1568 | } | |
65efcfce LB |
1569 | } |
1570 | ||
1571 | ||
1572 | /*********************************************************************** | |
1573 | * Exterior Routes | |
1574 | ***********************************************************************/ | |
1575 | ||
1576 | #define DEBUG_IS_USABLE_INTERIOR 1 | |
1577 | ||
40381db7 | 1578 | static int is_usable_interior_route(struct bgp_path_info *bpi_interior) |
65efcfce | 1579 | { |
40381db7 | 1580 | if (!VALID_INTERIOR_TYPE(bpi_interior->type)) { |
65efcfce | 1581 | #if DEBUG_IS_USABLE_INTERIOR |
d62a17ae | 1582 | vnc_zlog_debug_verbose( |
1583 | "%s: NO: type %d is not valid interior type", __func__, | |
40381db7 | 1584 | bpi_interior->type); |
65efcfce | 1585 | #endif |
d62a17ae | 1586 | return 0; |
1587 | } | |
40381db7 | 1588 | if (!CHECK_FLAG(bpi_interior->flags, BGP_PATH_VALID)) { |
65efcfce | 1589 | #if DEBUG_IS_USABLE_INTERIOR |
1defdda8 | 1590 | vnc_zlog_debug_verbose("%s: NO: BGP_PATH_VALID not set", |
d62a17ae | 1591 | __func__); |
65efcfce | 1592 | #endif |
d62a17ae | 1593 | return 0; |
1594 | } | |
1595 | return 1; | |
65efcfce LB |
1596 | } |
1597 | ||
1598 | /* | |
1599 | * There should be only one of these per prefix at a time. | |
1600 | * This should be called as a result of selection operation | |
1601 | * | |
1602 | * NB should be called espacially for bgp instances that are named, | |
1603 | * because the exterior routes will always come from one of those. | |
1604 | * We filter here on the instance name to make sure we get only the | |
1605 | * right routes. | |
1606 | */ | |
d62a17ae | 1607 | static void vnc_import_bgp_exterior_add_route_it( |
1608 | struct bgp *bgp, /* exterior instance, we hope */ | |
5a1ae2c2 DS |
1609 | const struct prefix *prefix, /* unicast prefix */ |
1610 | struct bgp_path_info *info, /* unicast info */ | |
d62a17ae | 1611 | struct rfapi_import_table *it_only) /* NULL, or limit to this IT */ |
65efcfce | 1612 | { |
d62a17ae | 1613 | struct rfapi *h; |
1614 | struct rfapi_cfg *hc; | |
1615 | struct prefix pfx_orig_nexthop; | |
1616 | struct rfapi_import_table *it; | |
1617 | struct bgp *bgp_default = bgp_get_default(); | |
1618 | afi_t afi = family2afi(prefix->family); | |
1619 | ||
1620 | if (!bgp_default) | |
1621 | return; | |
1622 | ||
1623 | h = bgp_default->rfapi; | |
1624 | hc = bgp_default->rfapi_cfg; | |
1625 | ||
1626 | vnc_zlog_debug_verbose("%s: entry with it=%p", __func__, it_only); | |
1627 | ||
1628 | if (!h || !hc) { | |
1629 | vnc_zlog_debug_verbose( | |
1630 | "%s: rfapi or rfapi_cfg not instantiated, skipping", | |
1631 | __func__); | |
1632 | return; | |
1633 | } | |
1634 | if (!hc->redist_bgp_exterior_view) { | |
1635 | vnc_zlog_debug_verbose("%s: exterior view not set, skipping", | |
1636 | __func__); | |
1637 | return; | |
1638 | } | |
1639 | if (bgp != hc->redist_bgp_exterior_view) { | |
1640 | vnc_zlog_debug_verbose( | |
1641 | "%s: bgp %p != hc->redist_bgp_exterior_view %p, skipping", | |
1642 | __func__, bgp, hc->redist_bgp_exterior_view); | |
1643 | return; | |
1644 | } | |
1645 | ||
1646 | if (!hc->redist[afi][ZEBRA_ROUTE_BGP_DIRECT_EXT]) { | |
1647 | vnc_zlog_debug_verbose( | |
1648 | "%s: redist of exterior routes not enabled, skipping", | |
1649 | __func__); | |
1650 | return; | |
1651 | } | |
1652 | ||
d62a17ae | 1653 | /* |
1654 | * Extract nexthop from exterior route | |
1655 | * | |
1656 | * Incoming prefix is unicast. If v6, it is in multiprotocol area, | |
1657 | * but if v4 it is in attr->nexthop | |
1658 | */ | |
1659 | rfapiUnicastNexthop2Prefix(afi, info->attr, &pfx_orig_nexthop); | |
1660 | ||
1661 | for (it = h->imports; it; it = it->next) { | |
fe08ba7e DS |
1662 | struct agg_table *table; |
1663 | struct agg_node *rn; | |
1664 | struct agg_node *par; | |
40381db7 | 1665 | struct bgp_path_info *bpi_interior; |
d62a17ae | 1666 | int have_usable_route; |
1667 | ||
1668 | vnc_zlog_debug_verbose("%s: doing it %p", __func__, it); | |
1669 | ||
1670 | if (it_only && (it_only != it)) { | |
1671 | vnc_zlog_debug_verbose("%s: doesn't match it_only %p", | |
1672 | __func__, it_only); | |
1673 | continue; | |
1674 | } | |
1675 | ||
1676 | table = it->imported_vpn[afi]; | |
1677 | ||
fe08ba7e | 1678 | for (rn = agg_node_match(table, &pfx_orig_nexthop), |
d62a17ae | 1679 | have_usable_route = 0; |
1680 | (!have_usable_route) && rn;) { | |
1681 | ||
1682 | vnc_zlog_debug_verbose("%s: it %p trying rn %p", | |
1683 | __func__, it, rn); | |
1684 | ||
40381db7 DS |
1685 | for (bpi_interior = rn->info; bpi_interior; |
1686 | bpi_interior = bpi_interior->next) { | |
d62a17ae | 1687 | struct prefix_rd *prd; |
1688 | struct attr new_attr; | |
d7c0a89a | 1689 | uint32_t label = 0; |
d62a17ae | 1690 | |
40381db7 | 1691 | if (!is_usable_interior_route(bpi_interior)) |
d62a17ae | 1692 | continue; |
1693 | ||
1694 | vnc_zlog_debug_verbose( | |
40381db7 DS |
1695 | "%s: usable: bpi_interior %p", __func__, |
1696 | bpi_interior); | |
d62a17ae | 1697 | |
1698 | /* | |
1699 | * have a legitimate route to exterior's nexthop | |
1700 | * via NVE. | |
1701 | * | |
1702 | * Import unicast route to the import table | |
1703 | */ | |
1704 | have_usable_route = 1; | |
1705 | ||
40381db7 DS |
1706 | if (bpi_interior->extra) { |
1707 | prd = &bpi_interior->extra->vnc.import | |
d62a17ae | 1708 | .rd; |
1709 | label = decode_label( | |
40381db7 | 1710 | &bpi_interior->extra->label[0]); |
d62a17ae | 1711 | } else |
1712 | prd = NULL; | |
1713 | ||
1714 | /* use local_pref from unicast route */ | |
1715 | memset(&new_attr, 0, sizeof(struct attr)); | |
6f4f49b2 | 1716 | new_attr = *bpi_interior->attr; |
d62a17ae | 1717 | if (info->attr->flag |
1718 | & ATTR_FLAG_BIT(BGP_ATTR_LOCAL_PREF)) { | |
1719 | new_attr.local_pref = | |
1720 | info->attr->local_pref; | |
1721 | new_attr.flag |= ATTR_FLAG_BIT( | |
1722 | BGP_ATTR_LOCAL_PREF); | |
1723 | } | |
1724 | ||
1725 | rfapiBgpInfoFilteredImportVPN( | |
1726 | it, FIF_ACTION_UPDATE, | |
40381db7 | 1727 | bpi_interior->peer, NULL, /* rfd */ |
d62a17ae | 1728 | prefix, NULL, afi, prd, &new_attr, |
1729 | ZEBRA_ROUTE_BGP_DIRECT_EXT, | |
1730 | BGP_ROUTE_REDISTRIBUTE, &label); | |
1731 | } | |
1732 | ||
1733 | if (have_usable_route) { | |
1734 | /* | |
1735 | * Make monitor | |
1736 | * | |
1737 | * TBD factor this out into its own function | |
1738 | */ | |
1739 | struct prefix *pfx_mon = prefix_new(); | |
1740 | if (!RFAPI_MONITOR_EXTERIOR(rn)->source) { | |
1741 | RFAPI_MONITOR_EXTERIOR(rn)->source = | |
1742 | skiplist_new( | |
1743 | 0, NULL, | |
63265b5c | 1744 | prefix_free_lists); |
fe08ba7e | 1745 | agg_lock_node(rn); /* for skiplist */ |
d62a17ae | 1746 | } |
fe08ba7e | 1747 | agg_lock_node(rn); /* for skiplist entry */ |
d62a17ae | 1748 | prefix_copy(pfx_mon, prefix); |
1749 | if (!skiplist_insert( | |
1750 | RFAPI_MONITOR_EXTERIOR(rn)->source, | |
1751 | info, pfx_mon)) { | |
1752 | ||
18ee8310 | 1753 | bgp_path_info_lock(info); |
d62a17ae | 1754 | } |
1755 | } | |
fe08ba7e | 1756 | par = agg_node_parent(rn); |
d62a17ae | 1757 | if (par) |
fe08ba7e DS |
1758 | agg_lock_node(par); |
1759 | agg_unlock_node(rn); | |
d62a17ae | 1760 | rn = par; |
1761 | } | |
1762 | if (rn) | |
fe08ba7e | 1763 | agg_unlock_node(rn); |
d62a17ae | 1764 | |
1765 | if (!have_usable_route) { | |
1766 | struct prefix *pfx_mon = prefix_new(); | |
1767 | prefix_copy(pfx_mon, prefix); | |
1768 | if (!skiplist_insert(it->monitor_exterior_orphans, info, | |
1769 | pfx_mon)) { | |
1770 | ||
18ee8310 | 1771 | bgp_path_info_lock(info); |
d62a17ae | 1772 | } |
1773 | } | |
1774 | } | |
65efcfce LB |
1775 | } |
1776 | ||
d62a17ae | 1777 | void vnc_import_bgp_exterior_add_route( |
5a1ae2c2 DS |
1778 | struct bgp *bgp, /* exterior instance, we hope */ |
1779 | const struct prefix *prefix, /* unicast prefix */ | |
1780 | struct bgp_path_info *info) /* unicast info */ | |
65efcfce | 1781 | { |
d62a17ae | 1782 | vnc_import_bgp_exterior_add_route_it(bgp, prefix, info, NULL); |
65efcfce LB |
1783 | } |
1784 | ||
1785 | /* | |
1786 | * There should be only one of these per prefix at a time. | |
1787 | * This should probably be called as a result of selection operation. | |
1788 | * | |
1789 | * NB should be called espacially for bgp instances that are named, | |
1790 | * because the exterior routes will always come from one of those. | |
1791 | * We filter here on the instance name to make sure we get only the | |
1792 | * right routes. | |
1793 | */ | |
d62a17ae | 1794 | void vnc_import_bgp_exterior_del_route( |
5a1ae2c2 DS |
1795 | struct bgp *bgp, const struct prefix *prefix, /* unicast prefix */ |
1796 | struct bgp_path_info *info) /* unicast info */ | |
65efcfce | 1797 | { |
d62a17ae | 1798 | struct rfapi *h; |
1799 | struct rfapi_cfg *hc; | |
1800 | struct rfapi_import_table *it; | |
1801 | struct prefix pfx_orig_nexthop; | |
1802 | afi_t afi = family2afi(prefix->family); | |
1803 | struct bgp *bgp_default = bgp_get_default(); | |
1804 | ||
1805 | if (!bgp_default) | |
1806 | return; | |
1807 | ||
1808 | memset(&pfx_orig_nexthop, 0, | |
1809 | sizeof(struct prefix)); /* keep valgrind happy */ | |
1810 | ||
1811 | h = bgp_default->rfapi; | |
1812 | hc = bgp_default->rfapi_cfg; | |
1813 | ||
1814 | if (!h || !hc) { | |
1815 | vnc_zlog_debug_verbose( | |
1816 | "%s: rfapi or rfapi_cfg not instantiated, skipping", | |
1817 | __func__); | |
1818 | return; | |
1819 | } | |
1820 | if (!hc->redist_bgp_exterior_view) { | |
1821 | vnc_zlog_debug_verbose("%s: exterior view not set, skipping", | |
1822 | __func__); | |
1823 | return; | |
1824 | } | |
1825 | if (bgp != hc->redist_bgp_exterior_view) { | |
1826 | vnc_zlog_debug_verbose( | |
1827 | "%s: bgp %p != hc->redist_bgp_exterior_view %p, skipping", | |
1828 | __func__, bgp, hc->redist_bgp_exterior_view); | |
1829 | return; | |
1830 | } | |
1831 | if (!hc->redist[afi][ZEBRA_ROUTE_BGP_DIRECT_EXT]) { | |
1832 | vnc_zlog_debug_verbose( | |
1833 | "%s: redist of exterior routes no enabled, skipping", | |
1834 | __func__); | |
1835 | return; | |
1836 | } | |
1837 | ||
d62a17ae | 1838 | /* |
1839 | * Extract nexthop from exterior route | |
1840 | * | |
1841 | * Incoming prefix is unicast. If v6, it is in multiprotocol area, | |
1842 | * but if v4 it is in attr->nexthop | |
1843 | */ | |
1844 | rfapiUnicastNexthop2Prefix(afi, info->attr, &pfx_orig_nexthop); | |
1845 | ||
1846 | for (it = h->imports; it; it = it->next) { | |
fe08ba7e DS |
1847 | struct agg_table *table; |
1848 | struct agg_node *rn; | |
1849 | struct agg_node *par; | |
40381db7 | 1850 | struct bgp_path_info *bpi_interior; |
d62a17ae | 1851 | int have_usable_route; |
1852 | ||
1853 | table = it->imported_vpn[afi]; | |
1854 | ||
fe08ba7e | 1855 | for (rn = agg_node_match(table, &pfx_orig_nexthop), |
d62a17ae | 1856 | have_usable_route = 0; |
1857 | (!have_usable_route) && rn;) { | |
1858 | ||
40381db7 DS |
1859 | for (bpi_interior = rn->info; bpi_interior; |
1860 | bpi_interior = bpi_interior->next) { | |
d62a17ae | 1861 | struct prefix_rd *prd; |
d7c0a89a | 1862 | uint32_t label = 0; |
d62a17ae | 1863 | |
40381db7 | 1864 | if (!is_usable_interior_route(bpi_interior)) |
d62a17ae | 1865 | continue; |
1866 | ||
1867 | /* | |
1868 | * have a legitimate route to exterior's nexthop | |
1869 | * via NVE. | |
1870 | * | |
1871 | * Import unicast route to the import table | |
1872 | */ | |
1873 | have_usable_route = 1; | |
1874 | ||
40381db7 DS |
1875 | if (bpi_interior->extra) { |
1876 | prd = &bpi_interior->extra->vnc.import | |
d62a17ae | 1877 | .rd; |
1878 | label = decode_label( | |
40381db7 | 1879 | &bpi_interior->extra->label[0]); |
d62a17ae | 1880 | } else |
1881 | prd = NULL; | |
1882 | ||
1883 | rfapiBgpInfoFilteredImportVPN( | |
40381db7 | 1884 | it, FIF_ACTION_KILL, bpi_interior->peer, |
d62a17ae | 1885 | NULL, /* rfd */ |
1886 | prefix, NULL, afi, prd, | |
40381db7 | 1887 | bpi_interior->attr, |
d62a17ae | 1888 | ZEBRA_ROUTE_BGP_DIRECT_EXT, |
1889 | BGP_ROUTE_REDISTRIBUTE, &label); | |
1890 | ||
1891 | /* | |
1892 | * Delete monitor | |
1893 | * | |
1894 | * TBD factor this out into its own function | |
1895 | */ | |
1896 | { | |
1897 | if (RFAPI_MONITOR_EXTERIOR(rn) | |
1898 | ->source) { | |
1899 | if (!skiplist_delete( | |
1900 | RFAPI_MONITOR_EXTERIOR( | |
1901 | rn) | |
1902 | ->source, | |
1903 | info, NULL)) { | |
1904 | ||
18ee8310 DS |
1905 | bgp_path_info_unlock( |
1906 | info); | |
fe08ba7e | 1907 | agg_unlock_node( |
d62a17ae | 1908 | rn); /* sl entry |
fe08ba7e | 1909 | */ |
d62a17ae | 1910 | } |
1911 | if (skiplist_empty( | |
1912 | RFAPI_MONITOR_EXTERIOR( | |
1913 | rn) | |
1914 | ->source)) { | |
1915 | skiplist_free( | |
1916 | RFAPI_MONITOR_EXTERIOR( | |
1917 | rn) | |
1918 | ->source); | |
1919 | RFAPI_MONITOR_EXTERIOR( | |
1920 | rn) | |
1921 | ->source = NULL; | |
fe08ba7e | 1922 | agg_unlock_node( |
d62a17ae | 1923 | rn); /* skiplist |
1924 | itself | |
1925 | */ | |
1926 | } | |
1927 | } | |
1928 | } | |
1929 | } | |
fe08ba7e | 1930 | par = agg_node_parent(rn); |
d62a17ae | 1931 | if (par) |
fe08ba7e DS |
1932 | agg_lock_node(par); |
1933 | agg_unlock_node(rn); | |
d62a17ae | 1934 | rn = par; |
1935 | } | |
1936 | if (rn) | |
fe08ba7e | 1937 | agg_unlock_node(rn); |
d62a17ae | 1938 | |
1939 | if (!have_usable_route) { | |
1940 | if (!skiplist_delete(it->monitor_exterior_orphans, info, | |
1941 | NULL)) { | |
1942 | ||
18ee8310 | 1943 | bgp_path_info_unlock(info); |
d62a17ae | 1944 | } |
1945 | } | |
1946 | } | |
65efcfce LB |
1947 | } |
1948 | ||
1949 | /* | |
1950 | * This function should be called after a new interior VPN route | |
1951 | * has been added to an import_table. | |
1952 | * | |
1953 | * NB should also be called whenever an existing vpn interior route | |
1954 | * becomes valid (e.g., valid_interior_count is inremented) | |
1955 | */ | |
d62a17ae | 1956 | void vnc_import_bgp_exterior_add_route_interior( |
1957 | struct bgp *bgp, struct rfapi_import_table *it, | |
40381db7 DS |
1958 | struct agg_node *rn_interior, /* VPN IT node */ |
1959 | struct bgp_path_info *bpi_interior) /* VPN IT route */ | |
65efcfce | 1960 | { |
26a3ffd6 DS |
1961 | const struct prefix *p = agg_node_get_prefix(rn_interior); |
1962 | afi_t afi = family2afi(p->family); | |
fe08ba7e | 1963 | struct agg_node *par; |
40381db7 | 1964 | struct bgp_path_info *bpi_exterior; |
d62a17ae | 1965 | struct prefix *pfx_exterior; /* exterior pfx */ |
1966 | void *cursor; | |
1967 | int rc; | |
1968 | struct list *list_adopted; | |
1969 | ||
1970 | vnc_zlog_debug_verbose("%s: entry", __func__); | |
1971 | ||
40381db7 | 1972 | if (!is_usable_interior_route(bpi_interior)) { |
d62a17ae | 1973 | vnc_zlog_debug_verbose( |
1974 | "%s: not usable interior route, skipping", __func__); | |
1975 | return; | |
1976 | } | |
1977 | ||
1978 | if (!bgp->rfapi_cfg->redist[afi][ZEBRA_ROUTE_BGP_DIRECT_EXT]) { | |
1979 | vnc_zlog_debug_verbose( | |
1980 | "%s: redist of exterior routes no enabled, skipping", | |
1981 | __func__); | |
1982 | return; | |
1983 | } | |
1984 | ||
1985 | if (it == bgp->rfapi->it_ce) { | |
1986 | vnc_zlog_debug_verbose("%s: import table is it_ce, skipping", | |
1987 | __func__); | |
1988 | return; | |
1989 | } | |
1990 | ||
1991 | /*debugging */ | |
26a3ffd6 DS |
1992 | vnc_zlog_debug_verbose("%s: interior prefix=%pRN, bpi type=%d", |
1993 | __func__, rn_interior, bpi_interior->type); | |
d62a17ae | 1994 | |
1995 | if (RFAPI_HAS_MONITOR_EXTERIOR(rn_interior)) { | |
1996 | ||
1997 | int count = 0; /* debugging */ | |
1998 | ||
1999 | vnc_zlog_debug_verbose( | |
2000 | "%s: has exterior monitor; ext src: %p", __func__, | |
2001 | RFAPI_MONITOR_EXTERIOR(rn_interior)->source); | |
2002 | ||
2003 | /* | |
2004 | * There is a monitor here already. Therefore, we do not need | |
2005 | * to do any pulldown. Just construct exterior routes based | |
2006 | * on the new interior route. | |
2007 | */ | |
2008 | cursor = NULL; | |
2009 | for (rc = skiplist_next( | |
2010 | RFAPI_MONITOR_EXTERIOR(rn_interior)->source, | |
40381db7 | 2011 | (void **)&bpi_exterior, (void **)&pfx_exterior, |
d62a17ae | 2012 | &cursor); |
2013 | !rc; rc = skiplist_next( | |
2014 | RFAPI_MONITOR_EXTERIOR(rn_interior)->source, | |
40381db7 DS |
2015 | (void **)&bpi_exterior, |
2016 | (void **)&pfx_exterior, &cursor)) { | |
d62a17ae | 2017 | |
2018 | struct prefix_rd *prd; | |
2019 | struct attr new_attr; | |
d7c0a89a | 2020 | uint32_t label = 0; |
d62a17ae | 2021 | |
2022 | ||
2023 | ++count; /* debugging */ | |
2024 | ||
40381db7 | 2025 | assert(bpi_exterior); |
d62a17ae | 2026 | assert(pfx_exterior); |
2027 | ||
40381db7 DS |
2028 | if (bpi_interior->extra) { |
2029 | prd = &bpi_interior->extra->vnc.import.rd; | |
d62a17ae | 2030 | label = decode_label( |
40381db7 | 2031 | &bpi_interior->extra->label[0]); |
d62a17ae | 2032 | } else |
2033 | prd = NULL; | |
2034 | ||
2035 | /* use local_pref from unicast route */ | |
2036 | memset(&new_attr, 0, sizeof(struct attr)); | |
6f4f49b2 | 2037 | new_attr = *bpi_interior->attr; |
40381db7 DS |
2038 | if (bpi_exterior |
2039 | && (bpi_exterior->attr->flag | |
d62a17ae | 2040 | & ATTR_FLAG_BIT(BGP_ATTR_LOCAL_PREF))) { |
2041 | new_attr.local_pref = | |
40381db7 | 2042 | bpi_exterior->attr->local_pref; |
d62a17ae | 2043 | new_attr.flag |= |
2044 | ATTR_FLAG_BIT(BGP_ATTR_LOCAL_PREF); | |
2045 | } | |
2046 | ||
2047 | rfapiBgpInfoFilteredImportVPN( | |
40381db7 | 2048 | it, FIF_ACTION_UPDATE, bpi_interior->peer, |
d62a17ae | 2049 | NULL, /* rfd */ |
2050 | pfx_exterior, NULL, afi, prd, &new_attr, | |
2051 | ZEBRA_ROUTE_BGP_DIRECT_EXT, | |
2052 | BGP_ROUTE_REDISTRIBUTE, &label); | |
2053 | } | |
2054 | vnc_zlog_debug_verbose( | |
2055 | "%s: finished constructing exteriors based on existing monitors", | |
2056 | __func__); | |
2057 | return; | |
2058 | } | |
2059 | ||
2060 | vnc_zlog_debug_verbose("%s: no exterior monitor", __func__); | |
2061 | ||
2062 | /* | |
2063 | * No monitor at this node. Is this the first valid interior | |
2064 | * route at this node? | |
2065 | */ | |
2066 | if (RFAPI_MONITOR_EXTERIOR(rn_interior)->valid_interior_count > 1) { | |
2067 | vnc_zlog_debug_verbose( | |
2068 | "%s: new interior route not first valid one, skipping pulldown", | |
2069 | __func__); | |
2070 | return; | |
2071 | } | |
2072 | ||
2073 | /* | |
2074 | * Look up the tree for possible pulldown candidates. | |
2075 | * Find nearest parent with an exterior route monitor | |
2076 | */ | |
fe08ba7e DS |
2077 | for (par = agg_node_parent(rn_interior); par; |
2078 | par = agg_node_parent(par)) { | |
d62a17ae | 2079 | if (RFAPI_HAS_MONITOR_EXTERIOR(par)) |
2080 | break; | |
2081 | } | |
2082 | ||
2083 | if (par) { | |
2084 | ||
2085 | vnc_zlog_debug_verbose( | |
2086 | "%s: checking parent %p for possible pulldowns", | |
2087 | __func__, par); | |
2088 | ||
2089 | /* check monitors at par for possible pulldown */ | |
2090 | cursor = NULL; | |
2091 | for (rc = skiplist_next(RFAPI_MONITOR_EXTERIOR(par)->source, | |
40381db7 | 2092 | (void **)&bpi_exterior, |
d62a17ae | 2093 | (void **)&pfx_exterior, &cursor); |
2094 | !rc; | |
2095 | rc = skiplist_next(RFAPI_MONITOR_EXTERIOR(par)->source, | |
40381db7 | 2096 | (void **)&bpi_exterior, |
d62a17ae | 2097 | (void **)&pfx_exterior, &cursor)) { |
2098 | ||
2099 | struct prefix pfx_nexthop; | |
2100 | ||
2101 | memset(&pfx_nexthop, 0, | |
2102 | sizeof(struct prefix)); /* keep valgrind happy */ | |
2103 | ||
2104 | /* check original nexthop for prefix match */ | |
40381db7 | 2105 | rfapiUnicastNexthop2Prefix(afi, bpi_exterior->attr, |
d62a17ae | 2106 | &pfx_nexthop); |
2107 | ||
26a3ffd6 | 2108 | if (prefix_match(p, &pfx_nexthop)) { |
d62a17ae | 2109 | |
40381db7 | 2110 | struct bgp_path_info *bpi; |
d62a17ae | 2111 | struct prefix_rd *prd; |
2112 | struct attr new_attr; | |
d7c0a89a | 2113 | uint32_t label = 0; |
d62a17ae | 2114 | |
2115 | /* do pull-down */ | |
2116 | ||
2117 | /* | |
2118 | * add monitor to longer prefix | |
2119 | */ | |
2120 | struct prefix *pfx_mon = prefix_new(); | |
2121 | prefix_copy(pfx_mon, pfx_exterior); | |
2122 | if (!RFAPI_MONITOR_EXTERIOR(rn_interior) | |
2123 | ->source) { | |
2124 | RFAPI_MONITOR_EXTERIOR(rn_interior) | |
2125 | ->source = skiplist_new( | |
63265b5c | 2126 | 0, NULL, prefix_free_lists); |
fe08ba7e | 2127 | agg_lock_node(rn_interior); |
d62a17ae | 2128 | } |
2129 | skiplist_insert( | |
2130 | RFAPI_MONITOR_EXTERIOR(rn_interior) | |
2131 | ->source, | |
40381db7 | 2132 | bpi_exterior, pfx_mon); |
fe08ba7e | 2133 | agg_lock_node(rn_interior); |
d62a17ae | 2134 | |
2135 | /* | |
2136 | * Delete constructed exterior routes based on | |
2137 | * parent routes. | |
2138 | */ | |
40381db7 | 2139 | for (bpi = par->info; bpi; bpi = bpi->next) { |
d62a17ae | 2140 | |
40381db7 DS |
2141 | if (bpi->extra) { |
2142 | prd = &bpi->extra->vnc.import | |
2143 | .rd; | |
d62a17ae | 2144 | label = decode_label( |
40381db7 | 2145 | &bpi->extra->label[0]); |
d62a17ae | 2146 | } else |
2147 | prd = NULL; | |
2148 | ||
2149 | rfapiBgpInfoFilteredImportVPN( | |
40381db7 | 2150 | it, FIF_ACTION_KILL, bpi->peer, |
d62a17ae | 2151 | NULL, /* rfd */ |
2152 | pfx_exterior, NULL, afi, prd, | |
40381db7 | 2153 | bpi->attr, |
d62a17ae | 2154 | ZEBRA_ROUTE_BGP_DIRECT_EXT, |
2155 | BGP_ROUTE_REDISTRIBUTE, &label); | |
2156 | } | |
2157 | ||
2158 | ||
2159 | /* | |
2160 | * Add constructed exterior routes based on | |
2161 | * the new interior route at longer prefix. | |
2162 | */ | |
40381db7 DS |
2163 | if (bpi_interior->extra) { |
2164 | prd = &bpi_interior->extra->vnc.import | |
d62a17ae | 2165 | .rd; |
2166 | label = decode_label( | |
40381db7 | 2167 | &bpi_interior->extra->label[0]); |
d62a17ae | 2168 | } else |
2169 | prd = NULL; | |
2170 | ||
2171 | /* use local_pref from unicast route */ | |
2172 | memset(&new_attr, 0, sizeof(struct attr)); | |
6f4f49b2 | 2173 | new_attr = *bpi_interior->attr; |
40381db7 DS |
2174 | if (bpi_exterior |
2175 | && (bpi_exterior->attr->flag | |
d62a17ae | 2176 | & ATTR_FLAG_BIT(BGP_ATTR_LOCAL_PREF))) { |
2177 | new_attr.local_pref = | |
40381db7 | 2178 | bpi_exterior->attr->local_pref; |
d62a17ae | 2179 | new_attr.flag |= ATTR_FLAG_BIT( |
2180 | BGP_ATTR_LOCAL_PREF); | |
2181 | } | |
2182 | ||
2183 | rfapiBgpInfoFilteredImportVPN( | |
2184 | it, FIF_ACTION_UPDATE, | |
40381db7 | 2185 | bpi_interior->peer, NULL, /* rfd */ |
d62a17ae | 2186 | pfx_exterior, NULL, afi, prd, &new_attr, |
2187 | ZEBRA_ROUTE_BGP_DIRECT_EXT, | |
2188 | BGP_ROUTE_REDISTRIBUTE, &label); | |
2189 | } | |
2190 | } | |
2191 | ||
2192 | /* | |
2193 | * The only monitors at rn_interior are the ones we added just | |
2194 | * above, so we can use the rn_interior list to identify which | |
2195 | * monitors to delete from the parent. | |
2196 | */ | |
2197 | cursor = NULL; | |
2198 | for (rc = skiplist_next( | |
2199 | RFAPI_MONITOR_EXTERIOR(rn_interior)->source, | |
40381db7 | 2200 | (void **)&bpi_exterior, NULL, &cursor); |
d62a17ae | 2201 | !rc; rc = skiplist_next( |
2202 | RFAPI_MONITOR_EXTERIOR(rn_interior)->source, | |
40381db7 | 2203 | (void **)&bpi_exterior, NULL, &cursor)) { |
d62a17ae | 2204 | |
2205 | ||
2206 | skiplist_delete(RFAPI_MONITOR_EXTERIOR(par)->source, | |
40381db7 | 2207 | bpi_exterior, NULL); |
fe08ba7e | 2208 | agg_unlock_node(par); /* sl entry */ |
d62a17ae | 2209 | } |
2210 | if (skiplist_empty(RFAPI_MONITOR_EXTERIOR(par)->source)) { | |
2211 | skiplist_free(RFAPI_MONITOR_EXTERIOR(par)->source); | |
2212 | RFAPI_MONITOR_EXTERIOR(par)->source = NULL; | |
fe08ba7e | 2213 | agg_unlock_node(par); /* sl itself */ |
d62a17ae | 2214 | } |
2215 | } | |
2216 | ||
2217 | vnc_zlog_debug_verbose("%s: checking orphans", __func__); | |
2218 | ||
2219 | /* | |
2220 | * See if any orphans can be pulled down to the current node | |
2221 | */ | |
2222 | cursor = NULL; | |
2223 | list_adopted = NULL; | |
2224 | for (rc = skiplist_next(it->monitor_exterior_orphans, | |
40381db7 | 2225 | (void **)&bpi_exterior, (void **)&pfx_exterior, |
d62a17ae | 2226 | &cursor); |
2227 | !rc; rc = skiplist_next(it->monitor_exterior_orphans, | |
40381db7 | 2228 | (void **)&bpi_exterior, |
d62a17ae | 2229 | (void **)&pfx_exterior, &cursor)) { |
2230 | ||
2231 | struct prefix pfx_nexthop; | |
d62a17ae | 2232 | afi_t afi_exterior = family2afi(pfx_exterior->family); |
2233 | ||
d62a17ae | 2234 | vnc_zlog_debug_verbose( |
2dbe669b DA |
2235 | "%s: checking exterior orphan at prefix %pFX", __func__, |
2236 | pfx_exterior); | |
d62a17ae | 2237 | |
2238 | if (afi_exterior != afi) { | |
2239 | vnc_zlog_debug_verbose( | |
2240 | "%s: exterior orphan afi %d != interior afi %d, skip", | |
2241 | __func__, afi_exterior, afi); | |
2242 | continue; | |
2243 | } | |
2244 | ||
2245 | /* check original nexthop for prefix match */ | |
40381db7 | 2246 | rfapiUnicastNexthop2Prefix(afi, bpi_exterior->attr, |
d62a17ae | 2247 | &pfx_nexthop); |
2248 | ||
26a3ffd6 | 2249 | if (prefix_match(p, &pfx_nexthop)) { |
d62a17ae | 2250 | |
2251 | struct prefix_rd *prd; | |
2252 | struct attr new_attr; | |
d7c0a89a | 2253 | uint32_t label = 0; |
d62a17ae | 2254 | |
2255 | /* do pull-down */ | |
2256 | ||
2257 | /* | |
2258 | * add monitor to longer prefix | |
2259 | */ | |
2260 | ||
2261 | struct prefix *pfx_mon = prefix_new(); | |
2262 | prefix_copy(pfx_mon, pfx_exterior); | |
2263 | if (!RFAPI_MONITOR_EXTERIOR(rn_interior)->source) { | |
2264 | RFAPI_MONITOR_EXTERIOR(rn_interior)->source = | |
2265 | skiplist_new( | |
63265b5c | 2266 | 0, NULL, prefix_free_lists); |
fe08ba7e | 2267 | agg_lock_node(rn_interior); /* sl */ |
d62a17ae | 2268 | } |
2269 | skiplist_insert( | |
2270 | RFAPI_MONITOR_EXTERIOR(rn_interior)->source, | |
40381db7 | 2271 | bpi_exterior, pfx_mon); |
fe08ba7e | 2272 | agg_lock_node(rn_interior); /* sl entry */ |
d62a17ae | 2273 | if (!list_adopted) { |
2274 | list_adopted = list_new(); | |
2275 | } | |
40381db7 | 2276 | listnode_add(list_adopted, bpi_exterior); |
d62a17ae | 2277 | |
2278 | /* | |
2279 | * Add constructed exterior routes based on the | |
2280 | * new interior route at the longer prefix. | |
2281 | */ | |
40381db7 DS |
2282 | if (bpi_interior->extra) { |
2283 | prd = &bpi_interior->extra->vnc.import.rd; | |
d62a17ae | 2284 | label = decode_label( |
40381db7 | 2285 | &bpi_interior->extra->label[0]); |
d62a17ae | 2286 | } else |
2287 | prd = NULL; | |
2288 | ||
2289 | /* use local_pref from unicast route */ | |
2290 | memset(&new_attr, 0, sizeof(struct attr)); | |
6f4f49b2 | 2291 | new_attr = *bpi_interior->attr; |
40381db7 DS |
2292 | if (bpi_exterior |
2293 | && (bpi_exterior->attr->flag | |
d62a17ae | 2294 | & ATTR_FLAG_BIT(BGP_ATTR_LOCAL_PREF))) { |
2295 | new_attr.local_pref = | |
40381db7 | 2296 | bpi_exterior->attr->local_pref; |
d62a17ae | 2297 | new_attr.flag |= |
2298 | ATTR_FLAG_BIT(BGP_ATTR_LOCAL_PREF); | |
2299 | } | |
2300 | ||
2301 | rfapiBgpInfoFilteredImportVPN( | |
40381db7 | 2302 | it, FIF_ACTION_UPDATE, bpi_interior->peer, |
d62a17ae | 2303 | NULL, /* rfd */ |
2304 | pfx_exterior, NULL, afi, prd, &new_attr, | |
2305 | ZEBRA_ROUTE_BGP_DIRECT_EXT, | |
2306 | BGP_ROUTE_REDISTRIBUTE, &label); | |
2307 | } | |
2308 | } | |
2309 | if (list_adopted) { | |
2310 | struct listnode *node; | |
40381db7 | 2311 | struct agg_node *an_bpi_exterior; |
d62a17ae | 2312 | |
40381db7 DS |
2313 | for (ALL_LIST_ELEMENTS_RO(list_adopted, node, |
2314 | an_bpi_exterior)) { | |
d62a17ae | 2315 | skiplist_delete(it->monitor_exterior_orphans, |
40381db7 | 2316 | an_bpi_exterior, NULL); |
d62a17ae | 2317 | } |
6a154c88 | 2318 | list_delete(&list_adopted); |
d62a17ae | 2319 | } |
65efcfce LB |
2320 | } |
2321 | ||
2322 | /* | |
2323 | * This function should be called after an interior VPN route | |
2324 | * has been deleted from an import_table. | |
40381db7 | 2325 | * bpi_interior must still be valid, but it must already be detached |
65efcfce LB |
2326 | * from its route node and the route node's valid_interior_count |
2327 | * must already be decremented. | |
2328 | * | |
2329 | * NB should also be called whenever an existing vpn interior route | |
2330 | * becomes invalid (e.g., valid_interior_count is decremented) | |
2331 | */ | |
d62a17ae | 2332 | void vnc_import_bgp_exterior_del_route_interior( |
2333 | struct bgp *bgp, struct rfapi_import_table *it, | |
40381db7 DS |
2334 | struct agg_node *rn_interior, /* VPN IT node */ |
2335 | struct bgp_path_info *bpi_interior) /* VPN IT route */ | |
65efcfce | 2336 | { |
26a3ffd6 DS |
2337 | const struct prefix *p = agg_node_get_prefix(rn_interior); |
2338 | afi_t afi = family2afi(p->family); | |
fe08ba7e | 2339 | struct agg_node *par; |
40381db7 | 2340 | struct bgp_path_info *bpi_exterior; |
d62a17ae | 2341 | struct prefix *pfx_exterior; /* exterior pfx */ |
2342 | void *cursor; | |
2343 | int rc; | |
2344 | ||
40381db7 | 2345 | if (!VALID_INTERIOR_TYPE(bpi_interior->type)) { |
d62a17ae | 2346 | vnc_zlog_debug_verbose( |
2347 | "%s: type %d not valid interior type, skipping", | |
40381db7 | 2348 | __func__, bpi_interior->type); |
d62a17ae | 2349 | return; |
2350 | } | |
2351 | ||
2352 | if (!bgp->rfapi_cfg->redist[afi][ZEBRA_ROUTE_BGP_DIRECT_EXT]) { | |
2353 | vnc_zlog_debug_verbose( | |
2354 | "%s: redist of exterior routes no enabled, skipping", | |
2355 | __func__); | |
2356 | return; | |
2357 | } | |
2358 | ||
2359 | if (it == bgp->rfapi->it_ce) { | |
2360 | vnc_zlog_debug_verbose("%s: it is it_ce, skipping", __func__); | |
2361 | return; | |
2362 | } | |
2363 | ||
2364 | /* If no exterior routes depend on this prefix, nothing to do */ | |
2365 | if (!RFAPI_HAS_MONITOR_EXTERIOR(rn_interior)) { | |
2366 | vnc_zlog_debug_verbose("%s: no exterior monitor, skipping", | |
2367 | __func__); | |
2368 | return; | |
2369 | } | |
2370 | ||
2371 | /*debugging */ | |
26a3ffd6 DS |
2372 | vnc_zlog_debug_verbose("%s: interior prefix=%pRN, bpi type=%d", |
2373 | __func__, rn_interior, bpi_interior->type); | |
d62a17ae | 2374 | |
2375 | /* | |
2376 | * Remove constructed routes based on the deleted interior route | |
2377 | */ | |
2378 | cursor = NULL; | |
2379 | for (rc = skiplist_next(RFAPI_MONITOR_EXTERIOR(rn_interior)->source, | |
40381db7 | 2380 | (void **)&bpi_exterior, (void **)&pfx_exterior, |
d62a17ae | 2381 | &cursor); |
2382 | !rc; | |
2383 | rc = skiplist_next(RFAPI_MONITOR_EXTERIOR(rn_interior)->source, | |
40381db7 | 2384 | (void **)&bpi_exterior, (void **)&pfx_exterior, |
d62a17ae | 2385 | &cursor)) { |
2386 | ||
2387 | struct prefix_rd *prd; | |
d7c0a89a | 2388 | uint32_t label = 0; |
d62a17ae | 2389 | |
40381db7 DS |
2390 | if (bpi_interior->extra) { |
2391 | prd = &bpi_interior->extra->vnc.import.rd; | |
2392 | label = decode_label(&bpi_interior->extra->label[0]); | |
d62a17ae | 2393 | } else |
2394 | prd = NULL; | |
2395 | ||
2396 | rfapiBgpInfoFilteredImportVPN( | |
40381db7 DS |
2397 | it, FIF_ACTION_KILL, bpi_interior->peer, NULL, /* rfd */ |
2398 | pfx_exterior, NULL, afi, prd, bpi_interior->attr, | |
d62a17ae | 2399 | ZEBRA_ROUTE_BGP_DIRECT_EXT, BGP_ROUTE_REDISTRIBUTE, |
2400 | &label); | |
2401 | } | |
2402 | ||
2403 | /* | |
2404 | * If there are no remaining valid interior routes at this prefix, | |
2405 | * we need to look up the tree for a possible node to move monitors to | |
2406 | */ | |
2407 | if (RFAPI_MONITOR_EXTERIOR(rn_interior)->valid_interior_count) { | |
2408 | vnc_zlog_debug_verbose( | |
2409 | "%s: interior routes still present, skipping", | |
2410 | __func__); | |
2411 | return; | |
2412 | } | |
65efcfce | 2413 | |
d62a17ae | 2414 | /* |
2415 | * Find nearest parent with at least one valid interior route | |
2416 | * If none is found, par will end up NULL, and we will move | |
2417 | * the monitors to the orphan list for this import table | |
2418 | */ | |
fe08ba7e DS |
2419 | for (par = agg_node_parent(rn_interior); par; |
2420 | par = agg_node_parent(par)) { | |
d62a17ae | 2421 | if (RFAPI_MONITOR_EXTERIOR(par)->valid_interior_count) |
2422 | break; | |
2423 | } | |
2424 | ||
2425 | vnc_zlog_debug_verbose("%s: par=%p, ext src: %p", __func__, par, | |
2426 | RFAPI_MONITOR_EXTERIOR(rn_interior)->source); | |
2427 | ||
2428 | /* move all monitors */ | |
2429 | /* | |
2430 | * We will use and delete every element of the source skiplist | |
2431 | */ | |
2432 | while (!skiplist_first(RFAPI_MONITOR_EXTERIOR(rn_interior)->source, | |
40381db7 DS |
2433 | (void **)&bpi_exterior, |
2434 | (void **)&pfx_exterior)) { | |
d62a17ae | 2435 | |
2436 | struct prefix *pfx_mon = prefix_new(); | |
2437 | ||
2438 | prefix_copy(pfx_mon, pfx_exterior); | |
2439 | ||
2440 | if (par) { | |
2441 | ||
40381db7 | 2442 | struct bgp_path_info *bpi; |
d62a17ae | 2443 | |
2444 | /* | |
2445 | * Add monitor to parent node | |
2446 | */ | |
2447 | if (!RFAPI_MONITOR_EXTERIOR(par)->source) { | |
2448 | RFAPI_MONITOR_EXTERIOR(par)->source = | |
2449 | skiplist_new( | |
63265b5c | 2450 | 0, NULL, prefix_free_lists); |
fe08ba7e | 2451 | agg_lock_node(par); /* sl */ |
d62a17ae | 2452 | } |
2453 | skiplist_insert(RFAPI_MONITOR_EXTERIOR(par)->source, | |
40381db7 | 2454 | bpi_exterior, pfx_mon); |
fe08ba7e | 2455 | agg_lock_node(par); /* sl entry */ |
d62a17ae | 2456 | |
2457 | /* Add constructed exterior routes based on parent */ | |
40381db7 | 2458 | for (bpi = par->info; bpi; bpi = bpi->next) { |
d62a17ae | 2459 | |
2460 | struct prefix_rd *prd; | |
2461 | struct attr new_attr; | |
d7c0a89a | 2462 | uint32_t label = 0; |
d62a17ae | 2463 | |
40381db7 | 2464 | if (bpi->type == ZEBRA_ROUTE_BGP_DIRECT_EXT) |
d62a17ae | 2465 | continue; |
2466 | ||
40381db7 DS |
2467 | if (bpi->extra) { |
2468 | prd = &bpi->extra->vnc.import.rd; | |
317f1fe0 | 2469 | label = decode_label( |
40381db7 | 2470 | &bpi->extra->label[0]); |
d62a17ae | 2471 | } else |
2472 | prd = NULL; | |
2473 | ||
2474 | /* use local_pref from unicast route */ | |
2475 | memset(&new_attr, 0, sizeof(struct attr)); | |
6f4f49b2 | 2476 | new_attr = *bpi->attr; |
40381db7 DS |
2477 | if (bpi_exterior |
2478 | && (bpi_exterior->attr->flag | |
d62a17ae | 2479 | & ATTR_FLAG_BIT(BGP_ATTR_LOCAL_PREF))) { |
2480 | new_attr.local_pref = | |
40381db7 | 2481 | bpi_exterior->attr->local_pref; |
d62a17ae | 2482 | new_attr.flag |= ATTR_FLAG_BIT( |
2483 | BGP_ATTR_LOCAL_PREF); | |
2484 | } | |
2485 | ||
2486 | rfapiBgpInfoFilteredImportVPN( | |
40381db7 | 2487 | it, FIF_ACTION_UPDATE, bpi->peer, |
d62a17ae | 2488 | NULL, /* rfd */ |
2489 | pfx_exterior, NULL, afi, prd, &new_attr, | |
2490 | ZEBRA_ROUTE_BGP_DIRECT_EXT, | |
2491 | BGP_ROUTE_REDISTRIBUTE, &label); | |
2492 | } | |
2493 | ||
2494 | } else { | |
2495 | ||
2496 | /* | |
2497 | * No interior route for exterior's nexthop. Save | |
2498 | * monitor | |
2499 | * in orphan list to await future route. | |
2500 | */ | |
2501 | skiplist_insert(it->monitor_exterior_orphans, | |
40381db7 | 2502 | bpi_exterior, pfx_mon); |
d62a17ae | 2503 | } |
2504 | ||
2505 | skiplist_delete_first( | |
2506 | RFAPI_MONITOR_EXTERIOR(rn_interior)->source); | |
fe08ba7e | 2507 | agg_unlock_node(rn_interior); /* sl entry */ |
d62a17ae | 2508 | } |
2509 | if (skiplist_empty(RFAPI_MONITOR_EXTERIOR(rn_interior)->source)) { | |
2510 | skiplist_free(RFAPI_MONITOR_EXTERIOR(rn_interior)->source); | |
2511 | RFAPI_MONITOR_EXTERIOR(rn_interior)->source = NULL; | |
fe08ba7e | 2512 | agg_unlock_node(rn_interior); /* sl itself */ |
d62a17ae | 2513 | } |
65efcfce LB |
2514 | } |
2515 | ||
2516 | /*********************************************************************** | |
2517 | * Generic add/delete unicast routes | |
2518 | ***********************************************************************/ | |
2519 | ||
5a1ae2c2 | 2520 | void vnc_import_bgp_add_route(struct bgp *bgp, const struct prefix *prefix, |
4b7e6066 | 2521 | struct bgp_path_info *info) |
65efcfce | 2522 | { |
d62a17ae | 2523 | afi_t afi = family2afi(prefix->family); |
65efcfce | 2524 | |
7f88f54a | 2525 | if (VNC_DEBUG(VERBOSE)) { |
d62a17ae | 2526 | struct prefix pfx_nexthop; |
65efcfce | 2527 | |
d62a17ae | 2528 | rfapiUnicastNexthop2Prefix(afi, info->attr, &pfx_nexthop); |
2dbe669b DA |
2529 | vnc_zlog_debug_verbose("%s: pfx %pFX, nh %pFX", __func__, |
2530 | prefix, &pfx_nexthop); | |
d62a17ae | 2531 | } |
65efcfce | 2532 | #if DEBUG_RHN_LIST |
d62a17ae | 2533 | print_rhn_list(__func__, "ENTER "); |
65efcfce | 2534 | #endif |
d62a17ae | 2535 | VNC_RHNCK(enter); |
2536 | ||
2537 | if (!afi) { | |
450971aa | 2538 | flog_err(EC_LIB_DEVELOPMENT, "%s: can't get afi of prefix", |
1c50c1c0 | 2539 | __func__); |
d62a17ae | 2540 | return; |
2541 | } | |
2542 | ||
2543 | if (!bgp->rfapi_cfg) { | |
2544 | vnc_zlog_debug_verbose("%s: bgp->rfapi_cfg is NULL, skipping", | |
2545 | __func__); | |
2546 | return; | |
2547 | } | |
2548 | ||
2549 | /* check vnc redist flag for bgp direct routes */ | |
2550 | if (!bgp->rfapi_cfg->redist[afi][ZEBRA_ROUTE_BGP_DIRECT]) { | |
2551 | vnc_zlog_debug_verbose( | |
2552 | "%s: bgp->rfapi_cfg->redist[afi=%d][type=%d=ZEBRA_ROUTE_BGP_DIRECT] is 0, skipping", | |
2553 | __func__, afi, ZEBRA_ROUTE_BGP_DIRECT); | |
2554 | return; | |
2555 | } | |
2556 | ||
2557 | switch (bgp->rfapi_cfg->redist_mode) { | |
2558 | case VNC_REDIST_MODE_PLAIN: | |
2559 | vnc_import_bgp_add_route_mode_plain(bgp, prefix, info); | |
2560 | break; | |
2561 | ||
2562 | case VNC_REDIST_MODE_RFG: | |
2563 | if (bgp->rfapi_cfg->rfg_redist) | |
2564 | vnc_import_bgp_add_route_mode_nvegroup( | |
2565 | bgp, prefix, info, bgp->rfapi_cfg->rfg_redist); | |
2566 | else | |
2567 | vnc_zlog_debug_verbose("%s: mode RFG but no redist RFG", | |
2568 | __func__); | |
2569 | break; | |
2570 | ||
2571 | case VNC_REDIST_MODE_RESOLVE_NVE: | |
2572 | vnc_import_bgp_add_route_mode_resolve_nve(bgp, prefix, info); | |
2573 | break; | |
2574 | } | |
65efcfce | 2575 | #if DEBUG_RHN_LIST |
d62a17ae | 2576 | print_rhn_list(__func__, "LEAVE "); |
65efcfce | 2577 | #endif |
d62a17ae | 2578 | VNC_RHNCK(leave); |
65efcfce LB |
2579 | } |
2580 | ||
2581 | /* | |
2582 | * "Withdrawing a Route" import process | |
2583 | */ | |
5a1ae2c2 | 2584 | void vnc_import_bgp_del_route(struct bgp *bgp, const struct prefix *prefix, |
4b7e6066 | 2585 | struct bgp_path_info *info) /* unicast info */ |
65efcfce | 2586 | { |
d62a17ae | 2587 | afi_t afi = family2afi(prefix->family); |
65efcfce | 2588 | |
d62a17ae | 2589 | assert(afi); |
65efcfce | 2590 | |
d62a17ae | 2591 | { |
2592 | struct prefix pfx_nexthop; | |
65efcfce | 2593 | |
d62a17ae | 2594 | rfapiUnicastNexthop2Prefix(afi, info->attr, &pfx_nexthop); |
2dbe669b DA |
2595 | vnc_zlog_debug_verbose("%s: pfx %pFX, nh %pFX", __func__, |
2596 | prefix, &pfx_nexthop); | |
d62a17ae | 2597 | } |
65efcfce | 2598 | #if DEBUG_RHN_LIST |
d62a17ae | 2599 | print_rhn_list(__func__, "ENTER "); |
65efcfce | 2600 | #endif |
d62a17ae | 2601 | VNC_RHNCK(enter); |
2602 | ||
2603 | if (!bgp->rfapi_cfg) { | |
2604 | vnc_zlog_debug_verbose("%s: bgp->rfapi_cfg is NULL, skipping", | |
2605 | __func__); | |
2606 | return; | |
2607 | } | |
2608 | ||
2609 | /* check bgp redist flag for vnc direct ("vpn") routes */ | |
2610 | if (!bgp->rfapi_cfg->redist[afi][ZEBRA_ROUTE_BGP_DIRECT]) { | |
2611 | vnc_zlog_debug_verbose( | |
2612 | "%s: bgp redistribution of afi=%d VNC direct routes is off", | |
2613 | __func__, afi); | |
2614 | return; | |
2615 | } | |
2616 | ||
2617 | switch (bgp->rfapi_cfg->redist_mode) { | |
2618 | case VNC_REDIST_MODE_PLAIN: | |
2619 | vnc_import_bgp_del_route_mode_plain(bgp, prefix, info); | |
2620 | break; | |
2621 | ||
2622 | case VNC_REDIST_MODE_RFG: | |
2623 | if (bgp->rfapi_cfg->rfg_redist) | |
2624 | vnc_import_bgp_del_route_mode_nvegroup(bgp, prefix, | |
2625 | info); | |
2626 | else | |
2627 | vnc_zlog_debug_verbose("%s: mode RFG but no redist RFG", | |
2628 | __func__); | |
2629 | break; | |
2630 | ||
2631 | case VNC_REDIST_MODE_RESOLVE_NVE: | |
2632 | vnc_import_bgp_del_route_mode_resolve_nve(bgp, afi, prefix, | |
2633 | info); | |
2634 | break; | |
2635 | } | |
65efcfce | 2636 | #if DEBUG_RHN_LIST |
d62a17ae | 2637 | print_rhn_list(__func__, "LEAVE "); |
65efcfce | 2638 | #endif |
d62a17ae | 2639 | VNC_RHNCK(leave); |
65efcfce LB |
2640 | } |
2641 | ||
2642 | ||
2643 | /*********************************************************************** | |
2644 | * Enable/Disable | |
2645 | ***********************************************************************/ | |
2646 | ||
d62a17ae | 2647 | void vnc_import_bgp_redist_enable(struct bgp *bgp, afi_t afi) |
65efcfce | 2648 | { |
d62a17ae | 2649 | /* iterate over bgp unicast v4 and v6 routes, call |
2650 | * vnc_import_bgp_add_route */ | |
65efcfce | 2651 | |
9bcb3eef | 2652 | struct bgp_dest *dest; |
65efcfce | 2653 | |
d62a17ae | 2654 | vnc_zlog_debug_verbose("%s: entry, afi=%d", __func__, afi); |
65efcfce | 2655 | |
d62a17ae | 2656 | if (bgp->rfapi_cfg->redist[afi][ZEBRA_ROUTE_BGP_DIRECT]) { |
2657 | vnc_zlog_debug_verbose( | |
2658 | "%s: already enabled for afi %d, skipping", __func__, | |
2659 | afi); | |
2660 | return; | |
2661 | } | |
2662 | bgp->rfapi_cfg->redist[afi][ZEBRA_ROUTE_BGP_DIRECT] = 1; | |
65efcfce | 2663 | |
9bcb3eef DS |
2664 | for (dest = bgp_table_top(bgp->rib[afi][SAFI_UNICAST]); dest; |
2665 | dest = bgp_route_next(dest)) { | |
65efcfce | 2666 | |
40381db7 | 2667 | struct bgp_path_info *bpi; |
65efcfce | 2668 | |
9bcb3eef | 2669 | for (bpi = bgp_dest_get_bgp_path_info(dest); bpi; |
6f94b685 | 2670 | bpi = bpi->next) { |
65efcfce | 2671 | |
40381db7 | 2672 | if (CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED)) |
d62a17ae | 2673 | continue; |
65efcfce | 2674 | |
9bcb3eef | 2675 | vnc_import_bgp_add_route(bgp, bgp_dest_get_prefix(dest), |
b54892e0 | 2676 | bpi); |
d62a17ae | 2677 | } |
2678 | } | |
2679 | vnc_zlog_debug_verbose( | |
2680 | "%s: set redist[afi=%d][type=%d=ZEBRA_ROUTE_BGP_DIRECT] return", | |
2681 | __func__, afi, ZEBRA_ROUTE_BGP_DIRECT); | |
65efcfce LB |
2682 | } |
2683 | ||
d62a17ae | 2684 | void vnc_import_bgp_exterior_redist_enable(struct bgp *bgp, afi_t afi) |
65efcfce | 2685 | { |
d62a17ae | 2686 | struct bgp *bgp_exterior; |
9bcb3eef | 2687 | struct bgp_dest *dest; |
65efcfce | 2688 | |
d62a17ae | 2689 | bgp_exterior = bgp->rfapi_cfg->redist_bgp_exterior_view; |
65efcfce | 2690 | |
d62a17ae | 2691 | if (bgp->rfapi_cfg->redist[afi][ZEBRA_ROUTE_BGP_DIRECT_EXT]) { |
2692 | vnc_zlog_debug_verbose( | |
2693 | "%s: already enabled for afi %d, skipping", __func__, | |
2694 | afi); | |
2695 | return; | |
2696 | } | |
2697 | bgp->rfapi_cfg->redist[afi][ZEBRA_ROUTE_BGP_DIRECT_EXT] = 1; | |
65efcfce | 2698 | |
d62a17ae | 2699 | if (!bgp_exterior) { |
2700 | vnc_zlog_debug_verbose( | |
2701 | "%s: no exterior view set yet, no routes to import yet", | |
2702 | __func__); | |
2703 | return; | |
2704 | } | |
65efcfce | 2705 | |
9bcb3eef DS |
2706 | for (dest = bgp_table_top(bgp_exterior->rib[afi][SAFI_UNICAST]); dest; |
2707 | dest = bgp_route_next(dest)) { | |
65efcfce | 2708 | |
40381db7 | 2709 | struct bgp_path_info *bpi; |
65efcfce | 2710 | |
9bcb3eef | 2711 | for (bpi = bgp_dest_get_bgp_path_info(dest); bpi; |
6f94b685 | 2712 | bpi = bpi->next) { |
65efcfce | 2713 | |
40381db7 | 2714 | if (CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED)) |
d62a17ae | 2715 | continue; |
65efcfce | 2716 | |
b54892e0 | 2717 | vnc_import_bgp_exterior_add_route( |
9bcb3eef | 2718 | bgp_exterior, bgp_dest_get_prefix(dest), bpi); |
d62a17ae | 2719 | } |
2720 | } | |
2721 | vnc_zlog_debug_verbose( | |
2722 | "%s: set redist[afi=%d][type=%d=ZEBRA_ROUTE_BGP_DIRECT] return", | |
2723 | __func__, afi, ZEBRA_ROUTE_BGP_DIRECT); | |
65efcfce LB |
2724 | } |
2725 | ||
2726 | /* | |
2727 | * This function is for populating a newly-created Import Table | |
2728 | */ | |
d62a17ae | 2729 | void vnc_import_bgp_exterior_redist_enable_it( |
2730 | struct bgp *bgp, afi_t afi, struct rfapi_import_table *it_only) | |
65efcfce | 2731 | { |
d62a17ae | 2732 | struct bgp *bgp_exterior; |
9bcb3eef | 2733 | struct bgp_dest *dest; |
65efcfce | 2734 | |
d62a17ae | 2735 | vnc_zlog_debug_verbose("%s: entry", __func__); |
65efcfce | 2736 | |
d62a17ae | 2737 | bgp_exterior = bgp->rfapi_cfg->redist_bgp_exterior_view; |
65efcfce | 2738 | |
d62a17ae | 2739 | if (!bgp->rfapi_cfg->redist[afi][ZEBRA_ROUTE_BGP_DIRECT_EXT]) { |
2740 | vnc_zlog_debug_verbose("%s: not enabled for afi %d, skipping", | |
2741 | __func__, afi); | |
2742 | return; | |
2743 | } | |
65efcfce | 2744 | |
d62a17ae | 2745 | if (!bgp_exterior) { |
2746 | vnc_zlog_debug_verbose( | |
2747 | "%s: no exterior view set yet, no routes to import yet", | |
2748 | __func__); | |
2749 | return; | |
2750 | } | |
65efcfce | 2751 | |
9bcb3eef DS |
2752 | for (dest = bgp_table_top(bgp_exterior->rib[afi][SAFI_UNICAST]); dest; |
2753 | dest = bgp_route_next(dest)) { | |
65efcfce | 2754 | |
40381db7 | 2755 | struct bgp_path_info *bpi; |
65efcfce | 2756 | |
9bcb3eef | 2757 | for (bpi = bgp_dest_get_bgp_path_info(dest); bpi; |
6f94b685 | 2758 | bpi = bpi->next) { |
65efcfce | 2759 | |
40381db7 | 2760 | if (CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED)) |
d62a17ae | 2761 | continue; |
65efcfce | 2762 | |
d62a17ae | 2763 | vnc_import_bgp_exterior_add_route_it( |
9bcb3eef | 2764 | bgp_exterior, bgp_dest_get_prefix(dest), bpi, |
b54892e0 | 2765 | it_only); |
d62a17ae | 2766 | } |
2767 | } | |
65efcfce LB |
2768 | } |
2769 | ||
2770 | ||
d62a17ae | 2771 | void vnc_import_bgp_redist_disable(struct bgp *bgp, afi_t afi) |
65efcfce | 2772 | { |
d62a17ae | 2773 | /* |
2774 | * iterate over vpn routes, find routes of type ZEBRA_ROUTE_BGP_DIRECT, | |
2775 | * delete (call timer expire immediately) | |
2776 | */ | |
9bcb3eef DS |
2777 | struct bgp_dest *dest1; |
2778 | struct bgp_dest *dest2; | |
d62a17ae | 2779 | |
2780 | vnc_zlog_debug_verbose("%s: entry", __func__); | |
2781 | ||
2782 | if (!bgp->rfapi_cfg->redist[afi][ZEBRA_ROUTE_BGP_DIRECT]) { | |
2783 | vnc_zlog_debug_verbose( | |
2784 | "%s: already disabled for afi %d, skipping", __func__, | |
2785 | afi); | |
2786 | return; | |
2787 | } | |
2788 | ||
2789 | /* | |
2790 | * Two-level table for SAFI_MPLS_VPN | |
2791 | * Be careful when changing the things we iterate over | |
2792 | */ | |
9bcb3eef DS |
2793 | for (dest1 = bgp_table_top(bgp->rib[afi][SAFI_MPLS_VPN]); dest1; |
2794 | dest1 = bgp_route_next(dest1)) { | |
2795 | const struct prefix *dest1_p; | |
d62a17ae | 2796 | |
9bcb3eef | 2797 | if (!bgp_dest_has_bgp_path_info_data(dest1)) |
52a44d64 | 2798 | continue; |
d62a17ae | 2799 | |
9bcb3eef DS |
2800 | dest1_p = bgp_dest_get_prefix(dest1); |
2801 | for (dest2 = bgp_table_top(bgp_dest_get_bgp_table_info(dest1)); | |
2802 | dest2; dest2 = bgp_route_next(dest2)) { | |
2803 | const struct prefix *dest2_p = | |
2804 | bgp_dest_get_prefix(dest2); | |
52a44d64 DS |
2805 | struct bgp_path_info *bpi; |
2806 | struct bgp_path_info *nextbpi; | |
d62a17ae | 2807 | |
9bcb3eef | 2808 | for (bpi = bgp_dest_get_bgp_path_info(dest2); bpi; |
52a44d64 | 2809 | bpi = nextbpi) { |
d62a17ae | 2810 | |
52a44d64 | 2811 | nextbpi = bpi->next; |
b575a12c | 2812 | |
52a44d64 DS |
2813 | if (bpi->type != ZEBRA_ROUTE_BGP_DIRECT) |
2814 | continue; | |
d62a17ae | 2815 | |
52a44d64 DS |
2816 | struct rfapi_descriptor *rfd; |
2817 | vncHDBgpDirect.peer = bpi->peer; | |
d62a17ae | 2818 | |
52a44d64 | 2819 | assert(bpi->extra); |
d62a17ae | 2820 | |
52a44d64 | 2821 | rfd = bpi->extra->vnc.export.rfapi_handle; |
d62a17ae | 2822 | |
52a44d64 DS |
2823 | vnc_zlog_debug_verbose( |
2824 | "%s: deleting bpi=%p, bpi->peer=%p, bpi->type=%d, bpi->sub_type=%d, bpi->extra->vnc.export.rfapi_handle=%p [passing rfd=%p]", | |
2825 | __func__, bpi, bpi->peer, bpi->type, | |
2826 | bpi->sub_type, | |
2827 | (bpi->extra ? bpi->extra->vnc.export | |
2828 | .rfapi_handle | |
2829 | : NULL), | |
2830 | rfd); | |
2831 | ||
2832 | del_vnc_route(rfd, bpi->peer, bgp, | |
9bcb3eef DS |
2833 | SAFI_MPLS_VPN, dest2_p, |
2834 | (struct prefix_rd *)dest1_p, | |
52a44d64 DS |
2835 | bpi->type, bpi->sub_type, NULL, |
2836 | 1); /* kill */ | |
2837 | ||
2838 | vncHDBgpDirect.peer = NULL; | |
d62a17ae | 2839 | } |
2840 | } | |
2841 | } | |
2842 | /* Clear RHN list */ | |
2843 | if (bgp->rfapi->resolve_nve_nexthop) { | |
2844 | struct prefix_bag *pb; | |
4b7e6066 | 2845 | struct bgp_path_info *info; |
d62a17ae | 2846 | while (!skiplist_first(bgp->rfapi->resolve_nve_nexthop, NULL, |
2847 | (void *)&pb)) { | |
40381db7 | 2848 | info = pb->ubpi; |
d62a17ae | 2849 | skiplist_delete_first(bgp->rfapi->resolve_nve_nexthop); |
18ee8310 | 2850 | bgp_path_info_unlock(info); |
d62a17ae | 2851 | } |
2852 | } | |
2853 | ||
2854 | bgp->rfapi_cfg->redist[afi][ZEBRA_ROUTE_BGP_DIRECT] = 0; | |
2855 | vnc_zlog_debug_verbose("%s: return", __func__); | |
65efcfce LB |
2856 | } |
2857 | ||
2858 | ||
d62a17ae | 2859 | void vnc_import_bgp_exterior_redist_disable(struct bgp *bgp, afi_t afi) |
65efcfce | 2860 | { |
d62a17ae | 2861 | struct rfapi_cfg *hc = bgp->rfapi_cfg; |
2862 | struct bgp *bgp_exterior = hc->redist_bgp_exterior_view; | |
65efcfce | 2863 | |
d62a17ae | 2864 | vnc_zlog_debug_verbose("%s: entry", __func__); |
65efcfce | 2865 | |
d62a17ae | 2866 | if (!hc->redist[afi][ZEBRA_ROUTE_BGP_DIRECT_EXT]) { |
2867 | vnc_zlog_debug_verbose( | |
2868 | "%s: already disabled for afi %d, skipping", __func__, | |
2869 | afi); | |
2870 | return; | |
2871 | } | |
65efcfce | 2872 | |
d62a17ae | 2873 | if (!bgp_exterior) { |
2874 | vnc_zlog_debug_verbose( | |
2875 | "%s: bgp exterior view not defined, skipping", | |
2876 | __func__); | |
2877 | return; | |
2878 | } | |
65efcfce LB |
2879 | |
2880 | ||
d62a17ae | 2881 | { |
9bcb3eef DS |
2882 | struct bgp_dest *dest; |
2883 | for (dest = bgp_table_top(bgp_exterior->rib[afi][SAFI_UNICAST]); | |
2884 | dest; dest = bgp_route_next(dest)) { | |
65efcfce | 2885 | |
40381db7 | 2886 | struct bgp_path_info *bpi; |
65efcfce | 2887 | |
9bcb3eef | 2888 | for (bpi = bgp_dest_get_bgp_path_info(dest); bpi; |
6f94b685 | 2889 | bpi = bpi->next) { |
65efcfce | 2890 | |
40381db7 | 2891 | if (CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED)) |
d62a17ae | 2892 | continue; |
65efcfce | 2893 | |
b54892e0 | 2894 | vnc_import_bgp_exterior_del_route( |
9bcb3eef | 2895 | bgp_exterior, bgp_dest_get_prefix(dest), |
b54892e0 | 2896 | bpi); |
d62a17ae | 2897 | } |
2898 | } | |
65efcfce | 2899 | #if DEBUG_RHN_LIST |
d62a17ae | 2900 | print_rhn_list(__func__, NULL); |
65efcfce | 2901 | #endif |
d62a17ae | 2902 | } |
65efcfce | 2903 | |
d62a17ae | 2904 | bgp->rfapi_cfg->redist[afi][ZEBRA_ROUTE_BGP_DIRECT_EXT] = 0; |
2905 | vnc_zlog_debug_verbose("%s: return", __func__); | |
65efcfce | 2906 | } |