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acddc0ed | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
d62a17ae | 2 | /* |
65efcfce LB |
3 | * |
4 | * Copyright 2009-2016, LabN Consulting, L.L.C. | |
5 | * | |
65efcfce LB |
6 | */ |
7 | ||
8 | /* | |
9 | * File: vnc_import_bgp.c | |
10 | * Purpose: Import routes from BGP unicast directly (not via zebra) | |
11 | */ | |
12 | ||
f8b6f499 LB |
13 | #include "lib/zebra.h" |
14 | #include "lib/prefix.h" | |
fe08ba7e | 15 | #include "lib/agg_table.h" |
f8b6f499 LB |
16 | #include "lib/vty.h" |
17 | #include "lib/log.h" | |
18 | #include "lib/memory.h" | |
19 | #include "lib/linklist.h" | |
20 | #include "lib/plist.h" | |
21 | #include "lib/routemap.h" | |
02705213 | 22 | #include "lib/lib_errors.h" |
65efcfce | 23 | |
f8b6f499 LB |
24 | #include "bgpd/bgpd.h" |
25 | #include "bgpd/bgp_ecommunity.h" | |
26 | #include "bgpd/bgp_attr.h" | |
b2f0fa55 | 27 | #include "bgpd/bgp_route.h" |
d62a17ae | 28 | #include "bgpd/bgp_mplsvpn.h" /* for RD_TYPE_IP */ |
65efcfce | 29 | |
f8b6f499 LB |
30 | #include "bgpd/rfapi/vnc_export_bgp.h" |
31 | #include "bgpd/rfapi/bgp_rfapi_cfg.h" | |
32 | #include "bgpd/rfapi/rfapi.h" | |
33 | #include "bgpd/rfapi/rfapi_import.h" | |
34 | #include "bgpd/rfapi/rfapi_private.h" | |
35 | #include "bgpd/rfapi/rfapi_monitor.h" | |
36 | #include "bgpd/rfapi/rfapi_vty.h" | |
37 | #include "bgpd/rfapi/vnc_import_bgp.h" | |
38 | #include "bgpd/rfapi/vnc_import_bgp_p.h" | |
39 | #include "bgpd/rfapi/vnc_debug.h" | |
65efcfce LB |
40 | |
41 | #define ENABLE_VNC_RHNCK | |
42 | ||
43 | #define DEBUG_RHN_LIST 0 | |
44 | ||
45 | static struct rfapi_descriptor vncHDBgpDirect; /* dummy nve descriptor */ | |
46 | static struct rfapi_descriptor vncHDResolveNve; /* dummy nve descriptor */ | |
47 | ||
48 | /* | |
49 | * For routes from another AS: | |
50 | * | |
51 | * If MED is set, | |
52 | * LOCAL_PREF = 255 - MIN(255, MED) | |
53 | * else | |
54 | * LOCAL_PREF = default_local_pref | |
55 | * | |
56 | * For routes from the same AS: | |
57 | * | |
58 | * LOCAL_PREF unchanged | |
59 | */ | |
d62a17ae | 60 | uint32_t calc_local_pref(struct attr *attr, struct peer *peer) |
65efcfce | 61 | { |
d62a17ae | 62 | uint32_t local_pref = 0; |
63 | ||
64 | if (!attr) { | |
65 | if (peer) { | |
66 | return peer->bgp->default_local_pref; | |
67 | } | |
68 | return bgp_get_default()->default_local_pref; | |
69 | } | |
70 | ||
71 | if (peer && (peer->as != peer->bgp->as)) { | |
72 | if (attr->flag & ATTR_FLAG_BIT(BGP_ATTR_MULTI_EXIT_DISC)) { | |
73 | if (attr->med > 255) { | |
74 | local_pref = 0; | |
75 | } else { | |
76 | local_pref = 255 - attr->med; | |
77 | } | |
78 | } else { | |
79 | local_pref = peer->bgp->default_local_pref; | |
80 | } | |
81 | } else { | |
82 | if (attr->flag & ATTR_FLAG_BIT(BGP_ATTR_LOCAL_PREF)) { | |
83 | local_pref = attr->local_pref; | |
84 | } else { | |
85 | if (peer && peer->bgp) { | |
86 | local_pref = peer->bgp->default_local_pref; | |
87 | } | |
88 | } | |
89 | } | |
90 | ||
91 | return local_pref; | |
65efcfce LB |
92 | } |
93 | ||
5a1ae2c2 | 94 | static int is_host_prefix(const struct prefix *p) |
65efcfce | 95 | { |
d62a17ae | 96 | switch (p->family) { |
97 | case AF_INET: | |
12256b84 | 98 | return (p->prefixlen == IPV4_MAX_BITLEN); |
d62a17ae | 99 | case AF_INET6: |
13ccce6e | 100 | return (p->prefixlen == IPV6_MAX_BITLEN); |
d62a17ae | 101 | } |
102 | return 0; | |
65efcfce LB |
103 | } |
104 | ||
105 | /*********************************************************************** | |
106 | * RHN list | |
107 | ***********************************************************************/ | |
108 | ||
d62a17ae | 109 | struct prefix_bag { |
110 | struct prefix hpfx; /* ce address = unicast nexthop */ | |
111 | struct prefix upfx; /* unicast prefix */ | |
40381db7 | 112 | struct bgp_path_info *ubpi; /* unicast route */ |
65efcfce LB |
113 | }; |
114 | ||
d7c0a89a QY |
115 | static const uint8_t maskbit[] = {0x00, 0x80, 0xc0, 0xe0, 0xf0, |
116 | 0xf8, 0xfc, 0xfe, 0xff}; | |
65efcfce | 117 | |
1a4189d4 | 118 | int vnc_prefix_cmp(const void *pfx1, const void *pfx2) |
65efcfce | 119 | { |
d62a17ae | 120 | int offset; |
121 | int shift; | |
d7c0a89a | 122 | uint8_t mask; |
d62a17ae | 123 | |
1a4189d4 DS |
124 | const struct prefix *p1 = pfx1; |
125 | const struct prefix *p2 = pfx2; | |
d62a17ae | 126 | |
127 | if (p1->family < p2->family) | |
128 | return -1; | |
129 | if (p1->family > p2->family) | |
130 | return 1; | |
131 | ||
132 | if (p1->prefixlen < p2->prefixlen) | |
133 | return -1; | |
134 | if (p1->prefixlen > p2->prefixlen) | |
135 | return 1; | |
136 | ||
137 | offset = p1->prefixlen / 8; | |
138 | shift = p1->prefixlen % 8; | |
139 | if (shift == 0 && offset) { /* catch aligned case */ | |
140 | offset--; | |
141 | shift = 8; | |
142 | } | |
143 | ||
144 | /* Set both prefix's head pointer. */ | |
d7c0a89a QY |
145 | const uint8_t *pp1 = (const uint8_t *)&p1->u.prefix; |
146 | const uint8_t *pp2 = (const uint8_t *)&p2->u.prefix; | |
d62a17ae | 147 | |
148 | while (offset--) { | |
149 | if (*pp1 < *pp2) | |
150 | return -1; | |
151 | if (*pp1 > *pp2) | |
152 | return 1; | |
153 | ++pp1; | |
154 | ++pp2; | |
155 | } | |
156 | ||
157 | mask = maskbit[shift]; | |
158 | if ((*pp1 & mask) < (*pp2 & mask)) | |
159 | return -1; | |
160 | if ((*pp1 & mask) > (*pp2 & mask)) | |
161 | return 1; | |
162 | ||
163 | return 0; | |
65efcfce LB |
164 | } |
165 | ||
d62a17ae | 166 | static void prefix_bag_free(void *pb) |
65efcfce | 167 | { |
d62a17ae | 168 | XFREE(MTYPE_RFAPI_PREFIX_BAG, pb); |
65efcfce LB |
169 | } |
170 | ||
171 | #if DEBUG_RHN_LIST | |
d62a17ae | 172 | static void print_rhn_list(const char *tag1, const char *tag2) |
65efcfce | 173 | { |
d62a17ae | 174 | struct bgp *bgp; |
175 | struct skiplist *sl; | |
176 | struct skiplistnode *p; | |
177 | struct prefix_bag *pb; | |
178 | int count = 0; | |
179 | ||
180 | bgp = bgp_get_default(); | |
181 | if (!bgp) | |
182 | return; | |
183 | ||
184 | sl = bgp->frapi->resolve_nve_nexthop; | |
185 | if (!sl) { | |
186 | vnc_zlog_debug_verbose("%s: %s: RHN List is empty", | |
187 | (tag1 ? tag1 : ""), (tag2 ? tag2 : "")); | |
188 | return; | |
189 | } | |
190 | ||
191 | vnc_zlog_debug_verbose("%s: %s: RHN list:", (tag1 ? tag1 : ""), | |
192 | (tag2 ? tag2 : "")); | |
193 | ||
194 | /* XXX uses secret knowledge of skiplist structure */ | |
195 | for (p = sl->header->forward[0]; p; p = p->forward[0]) { | |
d62a17ae | 196 | pb = p->value; |
197 | ||
d62a17ae | 198 | vnc_zlog_debug_verbose( |
2dbe669b DA |
199 | "RHN Entry %d (q=%p): kpfx=%pFX, upfx=%pFX, hpfx=%pFX, ubpi=%p", |
200 | ++count, p, p->key, &pb->upfx, &pb->hpfx, pb->ubpi); | |
d62a17ae | 201 | } |
65efcfce LB |
202 | } |
203 | #endif | |
204 | ||
205 | #ifdef ENABLE_VNC_RHNCK | |
d62a17ae | 206 | static void vnc_rhnck(char *tag) |
65efcfce | 207 | { |
d62a17ae | 208 | struct bgp *bgp; |
209 | struct skiplist *sl; | |
210 | struct skiplistnode *p; | |
211 | ||
212 | bgp = bgp_get_default(); | |
213 | if (!bgp) | |
214 | return; | |
215 | sl = bgp->rfapi->resolve_nve_nexthop; | |
216 | ||
217 | if (!sl) | |
218 | return; | |
219 | ||
220 | /* XXX uses secret knowledge of skiplist structure */ | |
221 | for (p = sl->header->forward[0]; p; p = p->forward[0]) { | |
222 | struct prefix_bag *pb; | |
223 | struct prefix *pkey; | |
224 | afi_t afi; | |
225 | struct prefix pfx_orig_nexthop; | |
226 | ||
227 | memset(&pfx_orig_nexthop, 0, | |
6006b807 | 228 | sizeof(pfx_orig_nexthop)); /* keep valgrind happy */ |
d62a17ae | 229 | |
230 | pkey = p->key; | |
231 | pb = p->value; | |
232 | ||
233 | afi = family2afi(pb->upfx.family); | |
234 | ||
40381db7 | 235 | rfapiUnicastNexthop2Prefix(afi, pb->ubpi->attr, |
d62a17ae | 236 | &pfx_orig_nexthop); |
237 | ||
40381db7 | 238 | /* pb->hpfx, pb->ubpi nexthop, pkey should all reflect the same |
d62a17ae | 239 | * pfx */ |
240 | assert(!vnc_prefix_cmp(&pb->hpfx, pkey)); | |
241 | if (vnc_prefix_cmp(&pb->hpfx, &pfx_orig_nexthop)) { | |
d62a17ae | 242 | vnc_zlog_debug_verbose( |
2dbe669b DA |
243 | "%s: %s: FATAL: resolve_nve_nexthop list item bpi nexthop %pFX != nve pfx %pFX", |
244 | __func__, tag, &pfx_orig_nexthop, &pb->hpfx); | |
d62a17ae | 245 | assert(0); |
246 | } | |
247 | } | |
248 | vnc_zlog_debug_verbose("%s: vnc_rhnck OK", tag); | |
65efcfce LB |
249 | } |
250 | ||
772270f3 QY |
251 | #define VNC_RHNCK(n) \ |
252 | do { \ | |
253 | char buf[BUFSIZ]; \ | |
254 | snprintf(buf, sizeof(buf), "%s: %s", __func__, #n); \ | |
255 | vnc_rhnck(buf); \ | |
256 | } while (0) | |
65efcfce LB |
257 | |
258 | #else | |
259 | ||
260 | #define VNC_RHNCK(n) | |
261 | ||
262 | #endif | |
263 | ||
264 | /*********************************************************************** | |
265 | * Add/Delete Unicast Route | |
266 | ***********************************************************************/ | |
267 | ||
268 | /* | |
269 | * "Adding a Route" import process | |
270 | */ | |
271 | ||
272 | /* | |
273 | * extract and package information from the BGP unicast route. | |
274 | * Return code 0 means OK, non-0 means drop. | |
275 | * | |
276 | * If return code is 0, caller MUST release ecom | |
277 | */ | |
d62a17ae | 278 | static int process_unicast_route(struct bgp *bgp, /* in */ |
279 | afi_t afi, /* in */ | |
5a1ae2c2 DS |
280 | const struct prefix *prefix, /* in */ |
281 | struct bgp_path_info *info, /* in */ | |
282 | struct ecommunity **ecom, /* OUT */ | |
d62a17ae | 283 | struct prefix *unicast_nexthop) /* OUT */ |
65efcfce | 284 | { |
d62a17ae | 285 | struct rfapi_cfg *hc = bgp->rfapi_cfg; |
286 | struct peer *peer = info->peer; | |
287 | struct attr *attr = info->attr; | |
288 | struct attr hattr; | |
289 | struct route_map *rmap = NULL; | |
290 | struct prefix pfx_orig_nexthop; | |
291 | ||
292 | memset(&pfx_orig_nexthop, 0, | |
6006b807 | 293 | sizeof(pfx_orig_nexthop)); /* keep valgrind happy */ |
d62a17ae | 294 | |
295 | /* | |
296 | * prefix list check | |
297 | */ | |
298 | if (hc->plist_redist[ZEBRA_ROUTE_BGP_DIRECT][afi]) { | |
299 | vnc_zlog_debug_verbose("%s: HC prefix list is set, checking", | |
300 | __func__); | |
301 | if (prefix_list_apply( | |
302 | hc->plist_redist[ZEBRA_ROUTE_BGP_DIRECT][afi], | |
303 | prefix) | |
304 | == PREFIX_DENY) { | |
305 | vnc_zlog_debug_verbose( | |
306 | "%s: prefix list returns DENY, blocking route", | |
307 | __func__); | |
308 | return -1; | |
309 | } | |
310 | vnc_zlog_debug_verbose( | |
311 | "%s: prefix list returns PASS, allowing route", | |
312 | __func__); | |
313 | } | |
314 | ||
315 | /* apply routemap, if any, later */ | |
316 | rmap = hc->routemap_redist[ZEBRA_ROUTE_BGP_DIRECT]; | |
317 | ||
318 | /* | |
319 | * Extract original nexthop, which we expect to be a NVE connected | |
320 | * router | |
321 | * Note that this is the nexthop before any possible application of | |
322 | * policy | |
323 | */ | |
324 | /* | |
325 | * Incoming prefix is unicast. If v6, it is in multiprotocol area, | |
326 | * but if v4 it is in attr->nexthop | |
327 | */ | |
328 | rfapiUnicastNexthop2Prefix(afi, attr, &pfx_orig_nexthop); | |
329 | ||
330 | /* | |
331 | * route map handling | |
332 | * This code is here because it allocates an interned attr which | |
333 | * must be freed before we return. It's easier to put it after | |
334 | * all of the possible returns above. | |
335 | */ | |
6006b807 | 336 | memset(&hattr, 0, sizeof(hattr)); |
6f4f49b2 QY |
337 | /* hattr becomes a ghost attr */ |
338 | hattr = *attr; | |
d62a17ae | 339 | |
340 | if (rmap) { | |
4b7e6066 | 341 | struct bgp_path_info info; |
d62a17ae | 342 | route_map_result_t ret; |
343 | ||
344 | memset(&info, 0, sizeof(info)); | |
345 | info.peer = peer; | |
346 | info.attr = &hattr; | |
1782514f | 347 | ret = route_map_apply(rmap, prefix, &info); |
d62a17ae | 348 | if (ret == RMAP_DENYMATCH) { |
349 | bgp_attr_flush(&hattr); | |
350 | vnc_zlog_debug_verbose( | |
351 | "%s: route map \"%s\" says DENY, returning", | |
352 | __func__, rmap->name); | |
353 | return -1; | |
354 | } | |
355 | } | |
356 | ||
357 | /* | |
358 | * Get the (possibly altered by policy) unicast nexthop | |
359 | * for later lookup in the Import Table by caller | |
360 | */ | |
361 | rfapiUnicastNexthop2Prefix(afi, &hattr, unicast_nexthop); | |
362 | ||
b53e67a3 DA |
363 | if (bgp_attr_get_ecommunity(&hattr)) |
364 | *ecom = ecommunity_dup(bgp_attr_get_ecommunity(&hattr)); | |
d62a17ae | 365 | else |
366 | *ecom = ecommunity_new(); | |
367 | ||
368 | /* | |
369 | * Done with hattr, clean up | |
370 | */ | |
371 | bgp_attr_flush(&hattr); | |
372 | ||
373 | /* | |
374 | * Add EC that carries original NH of iBGP route (2 bytes = magic | |
375 | * value indicating it came from an VNC gateway; default 5226, but | |
376 | * must be user configurable). Note that this is the nexthop before | |
377 | * any application of policy. | |
378 | */ | |
379 | { | |
380 | struct ecommunity_val vnc_gateway_magic; | |
381 | uint16_t localadmin; | |
382 | ||
383 | /* Using route origin extended community type */ | |
384 | memset(&vnc_gateway_magic, 0, sizeof(vnc_gateway_magic)); | |
385 | vnc_gateway_magic.val[0] = 0x01; | |
386 | vnc_gateway_magic.val[1] = 0x03; | |
387 | ||
388 | /* Only works for IPv4 nexthops */ | |
389 | if (prefix->family == AF_INET) { | |
390 | memcpy(vnc_gateway_magic.val + 2, | |
391 | &unicast_nexthop->u.prefix4, 4); | |
392 | } | |
393 | localadmin = htons(hc->resolve_nve_roo_local_admin); | |
394 | memcpy(vnc_gateway_magic.val + 6, (char *)&localadmin, 2); | |
395 | ||
1207a5bc | 396 | ecommunity_add_val(*ecom, &vnc_gateway_magic, false, false); |
d62a17ae | 397 | } |
398 | ||
399 | return 0; | |
65efcfce LB |
400 | } |
401 | ||
402 | ||
d62a17ae | 403 | static void vnc_import_bgp_add_route_mode_resolve_nve_one_bi( |
40381db7 DS |
404 | struct bgp *bgp, afi_t afi, struct bgp_path_info *bpi, /* VPN bpi */ |
405 | struct prefix_rd *prd, /* RD */ | |
5a1ae2c2 DS |
406 | const struct prefix *prefix, /* unicast route prefix */ |
407 | uint32_t *local_pref, /* NULL = no local_pref */ | |
408 | uint32_t *med, /* NULL = no med */ | |
409 | struct ecommunity *ecom) /* generated ecoms */ | |
65efcfce | 410 | { |
d62a17ae | 411 | struct prefix un; |
412 | struct prefix nexthop; | |
413 | struct rfapi_ip_addr nexthop_h; | |
414 | uint32_t lifetime; | |
415 | uint32_t *plifetime; | |
416 | struct bgp_attr_encap_subtlv *encaptlvs; | |
417 | uint32_t label = 0; | |
418 | ||
419 | struct rfapi_un_option optary[3]; | |
420 | struct rfapi_un_option *opt = NULL; | |
421 | int cur_opt = 0; | |
65efcfce | 422 | |
d62a17ae | 423 | vnc_zlog_debug_verbose("%s: entry", __func__); |
424 | ||
40381db7 DS |
425 | if (bpi->type != ZEBRA_ROUTE_BGP |
426 | && bpi->type != ZEBRA_ROUTE_BGP_DIRECT) { | |
d62a17ae | 427 | |
428 | return; | |
429 | } | |
40381db7 DS |
430 | if (bpi->sub_type != BGP_ROUTE_NORMAL |
431 | && bpi->sub_type != BGP_ROUTE_STATIC | |
432 | && bpi->sub_type != BGP_ROUTE_RFP) { | |
d62a17ae | 433 | |
434 | return; | |
435 | } | |
40381db7 | 436 | if (CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED)) |
d62a17ae | 437 | return; |
438 | ||
40381db7 DS |
439 | vncHDResolveNve.peer = bpi->peer; |
440 | if (!rfapiGetVncTunnelUnAddr(bpi->attr, &un)) { | |
d62a17ae | 441 | if (rfapiQprefix2Raddr(&un, &vncHDResolveNve.un_addr)) |
442 | return; | |
443 | } else { | |
444 | memset(&vncHDResolveNve.un_addr, 0, | |
445 | sizeof(vncHDResolveNve.un_addr)); | |
446 | } | |
447 | ||
448 | /* Use nexthop of VPN route as nexthop of constructed route */ | |
40381db7 | 449 | rfapiNexthop2Prefix(bpi->attr, &nexthop); |
d62a17ae | 450 | rfapiQprefix2Raddr(&nexthop, &nexthop_h); |
451 | ||
40381db7 | 452 | if (rfapiGetVncLifetime(bpi->attr, &lifetime)) { |
d62a17ae | 453 | plifetime = NULL; |
454 | } else { | |
455 | plifetime = &lifetime; | |
456 | } | |
457 | ||
91ebf12c | 458 | encaptlvs = bgp_attr_get_vnc_subtlvs(bpi->attr); |
05864da7 DS |
459 | if (bpi->attr->encap_tunneltype != BGP_ENCAP_TYPE_RESERVED |
460 | && bpi->attr->encap_tunneltype != BGP_ENCAP_TYPE_MPLS) { | |
05864da7 DS |
461 | opt = &optary[cur_opt++]; |
462 | memset(opt, 0, sizeof(struct rfapi_un_option)); | |
463 | opt->type = RFAPI_UN_OPTION_TYPE_TUNNELTYPE; | |
464 | opt->v.tunnel.type = bpi->attr->encap_tunneltype; | |
465 | /* TBD parse bpi->attr->extra->encap_subtlvs */ | |
d62a17ae | 466 | } |
467 | ||
468 | struct ecommunity *new_ecom = ecommunity_dup(ecom); | |
469 | ||
b53e67a3 DA |
470 | if (bgp_attr_get_ecommunity(bpi->attr)) |
471 | ecommunity_merge(new_ecom, bgp_attr_get_ecommunity(bpi->attr)); | |
d62a17ae | 472 | |
40381db7 DS |
473 | if (bpi->extra) |
474 | label = decode_label(&bpi->extra->label[0]); | |
d62a17ae | 475 | |
476 | add_vnc_route(&vncHDResolveNve, bgp, SAFI_MPLS_VPN, | |
477 | prefix, /* unicast route prefix */ | |
478 | prd, &nexthop_h, /* new nexthop */ | |
479 | local_pref, plifetime, | |
480 | (struct bgp_tea_options *)encaptlvs, /* RFP options */ | |
481 | opt, NULL, new_ecom, med, /* NULL => don't set med */ | |
482 | (label ? &label : NULL), /* NULL= default */ | |
483 | ZEBRA_ROUTE_BGP_DIRECT, BGP_ROUTE_REDISTRIBUTE, | |
484 | RFAPI_AHR_RFPOPT_IS_VNCTLV); /* flags */ | |
485 | ||
486 | ecommunity_free(&new_ecom); | |
65efcfce LB |
487 | } |
488 | ||
d62a17ae | 489 | static void vnc_import_bgp_add_route_mode_resolve_nve_one_rd( |
5a1ae2c2 | 490 | struct prefix_rd *prd, /* RD */ |
d62a17ae | 491 | struct bgp_table *table_rd, /* per-rd VPN route table */ |
5a1ae2c2 DS |
492 | afi_t afi, struct bgp *bgp, |
493 | const struct prefix *prefix, /* unicast prefix */ | |
494 | struct ecommunity *ecom, /* generated ecoms */ | |
495 | uint32_t *local_pref, /* NULL = no local_pref */ | |
40381db7 DS |
496 | uint32_t *med, /* NULL = no med */ |
497 | struct prefix *ubpi_nexthop) /* unicast nexthop */ | |
65efcfce | 498 | { |
9bcb3eef | 499 | struct bgp_dest *bd; |
40381db7 | 500 | struct bgp_path_info *bpi; |
65efcfce | 501 | |
d62a17ae | 502 | if (!table_rd) |
503 | return; | |
65efcfce | 504 | |
2dbe669b | 505 | vnc_zlog_debug_verbose("%s: ubpi_nexthop=%pFX", __func__, ubpi_nexthop); |
65efcfce | 506 | |
d62a17ae | 507 | /* exact match */ |
9bcb3eef DS |
508 | bd = bgp_node_lookup(table_rd, ubpi_nexthop); |
509 | if (!bd) { | |
d62a17ae | 510 | vnc_zlog_debug_verbose( |
40381db7 DS |
511 | "%s: no match in RD's table for ubpi_nexthop", |
512 | __func__); | |
d62a17ae | 513 | return; |
514 | } | |
65efcfce | 515 | |
6f94b685 | 516 | /* Iterate over bgp_info items at this node */ |
9bcb3eef | 517 | for (bpi = bgp_dest_get_bgp_path_info(bd); bpi; bpi = bpi->next) { |
65efcfce | 518 | |
d62a17ae | 519 | vnc_import_bgp_add_route_mode_resolve_nve_one_bi( |
40381db7 | 520 | bgp, afi, bpi, /* VPN bpi */ |
d62a17ae | 521 | prd, prefix, local_pref, med, ecom); |
522 | } | |
65efcfce | 523 | |
9bcb3eef | 524 | bgp_dest_unlock_node(bd); |
65efcfce LB |
525 | } |
526 | ||
d62a17ae | 527 | static void vnc_import_bgp_add_route_mode_resolve_nve( |
5a1ae2c2 DS |
528 | struct bgp *bgp, const struct prefix *prefix, /* unicast prefix */ |
529 | struct bgp_path_info *info) /* unicast info */ | |
65efcfce | 530 | { |
d62a17ae | 531 | afi_t afi = family2afi(prefix->family); |
d62a17ae | 532 | |
533 | struct prefix pfx_unicast_nexthop = {0}; /* happy valgrind */ | |
534 | ||
535 | struct ecommunity *ecom = NULL; | |
536 | uint32_t local_pref; | |
537 | uint32_t *med = NULL; | |
538 | ||
539 | struct prefix_bag *pb; | |
9bcb3eef | 540 | struct bgp_dest *bdp; /* prd table node */ |
d62a17ae | 541 | |
542 | /*debugging */ | |
7f88f54a | 543 | if (VNC_DEBUG(VERBOSE)) { |
872ed4c7 | 544 | char str_nh[PREFIX_STRLEN]; |
d62a17ae | 545 | struct prefix nh; |
546 | ||
d62a17ae | 547 | nh.prefixlen = 0; |
548 | rfapiUnicastNexthop2Prefix(afi, info->attr, &nh); | |
549 | if (nh.prefixlen) { | |
872ed4c7 | 550 | prefix2str(&nh, str_nh, sizeof(str_nh)); |
d62a17ae | 551 | } else { |
552 | str_nh[0] = '?'; | |
553 | str_nh[1] = 0; | |
554 | } | |
555 | ||
556 | vnc_zlog_debug_verbose( | |
2dbe669b DA |
557 | "%s(bgp=%p, unicast prefix=%pFX, unicast nh=%s)", |
558 | __func__, bgp, prefix, str_nh); | |
d62a17ae | 559 | } |
560 | ||
561 | if (info->type != ZEBRA_ROUTE_BGP) { | |
562 | vnc_zlog_debug_verbose( | |
563 | "%s: unicast type %d=\"%s\" is not %d=%s, skipping", | |
564 | __func__, info->type, zebra_route_string(info->type), | |
565 | ZEBRA_ROUTE_BGP, "ZEBRA_ROUTE_BGP"); | |
566 | return; | |
567 | } | |
568 | ||
569 | /* | |
570 | * Preliminary checks | |
571 | */ | |
572 | ||
573 | if (!afi) { | |
450971aa | 574 | flog_err(EC_LIB_DEVELOPMENT, "%s: can't get afi of prefix", |
1c50c1c0 | 575 | __func__); |
d62a17ae | 576 | return; |
577 | } | |
578 | ||
3f54c705 | 579 | if (!(bgp->rfapi_cfg)) { |
d62a17ae | 580 | vnc_zlog_debug_verbose("%s: bgp->rfapi_cfg is NULL, skipping", |
581 | __func__); | |
582 | return; | |
583 | } | |
584 | ||
585 | /* check vnc redist flag for bgp direct routes */ | |
586 | if (!bgp->rfapi_cfg->redist[afi][ZEBRA_ROUTE_BGP_DIRECT]) { | |
587 | vnc_zlog_debug_verbose( | |
588 | "%s: bgp->rfapi_cfg->redist[afi=%d][type=ZEBRA_ROUTE_BGP_DIRECT] is 0, skipping", | |
589 | __func__, afi); | |
590 | return; | |
591 | } | |
592 | ||
593 | ||
594 | if (process_unicast_route(bgp, afi, prefix, info, &ecom, | |
595 | &pfx_unicast_nexthop)) { | |
596 | ||
597 | vnc_zlog_debug_verbose( | |
598 | "%s: process_unicast_route error, skipping", __func__); | |
599 | return; | |
600 | } | |
601 | ||
602 | local_pref = calc_local_pref(info->attr, info->peer); | |
05864da7 | 603 | if (info->attr->flag & ATTR_FLAG_BIT(BGP_ATTR_MULTI_EXIT_DISC)) |
d62a17ae | 604 | med = &info->attr->med; |
d62a17ae | 605 | |
606 | /* | |
607 | * At this point, we have allocated: | |
608 | * | |
609 | * ecom ecommunity ptr, union of unicast and ROO parts (no NVE part) | |
610 | * | |
611 | * And we have set: | |
612 | * | |
613 | * pfx_unicast_nexthop nexthop of uncast route | |
614 | */ | |
615 | ||
616 | if (!bgp->rfapi->resolve_nve_nexthop) { | |
617 | bgp->rfapi->resolve_nve_nexthop = | |
618 | skiplist_new(SKIPLIST_FLAG_ALLOW_DUPLICATES, | |
619 | vnc_prefix_cmp, prefix_bag_free); | |
620 | } | |
621 | ||
622 | pb = XCALLOC(MTYPE_RFAPI_PREFIX_BAG, sizeof(struct prefix_bag)); | |
623 | pb->hpfx = pfx_unicast_nexthop; | |
40381db7 | 624 | pb->ubpi = info; |
d62a17ae | 625 | pb->upfx = *prefix; |
626 | ||
18ee8310 | 627 | bgp_path_info_lock(info); /* skiplist refers to it */ |
d62a17ae | 628 | skiplist_insert(bgp->rfapi->resolve_nve_nexthop, &pb->hpfx, pb); |
629 | ||
630 | /* | |
631 | * Iterate over RDs in VPN RIB. For each RD, look up unicast nexthop | |
632 | * (exact match, /32). If an exact match is found, call add_vnc_route. | |
633 | */ | |
634 | ||
9bcb3eef DS |
635 | for (bdp = bgp_table_top(bgp->rib[afi][SAFI_MPLS_VPN]); bdp; |
636 | bdp = bgp_route_next(bdp)) { | |
d62a17ae | 637 | |
638 | struct bgp_table *table; | |
639 | ||
9bcb3eef | 640 | table = bgp_dest_get_bgp_table_info(bdp); |
d62a17ae | 641 | |
642 | if (!table) | |
643 | continue; | |
644 | ||
645 | vnc_import_bgp_add_route_mode_resolve_nve_one_rd( | |
9bcb3eef | 646 | (struct prefix_rd *)bgp_dest_get_prefix(bdp), table, |
b54892e0 DS |
647 | afi, bgp, prefix, ecom, &local_pref, med, |
648 | &pfx_unicast_nexthop); | |
d62a17ae | 649 | } |
650 | ||
651 | ||
652 | if (ecom) | |
653 | ecommunity_free(&ecom); | |
654 | ||
655 | vnc_zlog_debug_verbose("%s: done", __func__); | |
65efcfce LB |
656 | } |
657 | ||
658 | ||
d62a17ae | 659 | static void vnc_import_bgp_add_route_mode_plain(struct bgp *bgp, |
5a1ae2c2 | 660 | const struct prefix *prefix, |
4b7e6066 | 661 | struct bgp_path_info *info) |
65efcfce | 662 | { |
d62a17ae | 663 | afi_t afi = family2afi(prefix->family); |
664 | struct peer *peer = info->peer; | |
665 | struct attr *attr = info->attr; | |
666 | struct attr hattr; | |
3f54c705 | 667 | struct rfapi_cfg *hc = bgp->rfapi_cfg; |
d62a17ae | 668 | struct attr *iattr = NULL; |
669 | ||
670 | struct rfapi_ip_addr vnaddr; | |
671 | struct prefix vn_pfx_space; | |
672 | struct prefix *vn_pfx = NULL; | |
673 | int ahr_flags = 0; | |
674 | struct ecommunity *ecom = NULL; | |
675 | struct prefix_rd prd; | |
676 | struct route_map *rmap = NULL; | |
677 | uint32_t local_pref; | |
678 | uint32_t *med = NULL; | |
679 | ||
2dbe669b | 680 | vnc_zlog_debug_verbose("%s(prefix=%pFX) entry", __func__, prefix); |
d62a17ae | 681 | |
682 | if (!afi) { | |
450971aa | 683 | flog_err(EC_LIB_DEVELOPMENT, "%s: can't get afi of prefix", |
1c50c1c0 | 684 | __func__); |
d62a17ae | 685 | return; |
686 | } | |
687 | ||
3f54c705 | 688 | if (!hc) { |
d62a17ae | 689 | vnc_zlog_debug_verbose("%s: bgp->rfapi_cfg is NULL, skipping", |
690 | __func__); | |
691 | return; | |
692 | } | |
693 | ||
694 | /* check vnc redist flag for bgp direct routes */ | |
695 | if (!bgp->rfapi_cfg->redist[afi][ZEBRA_ROUTE_BGP_DIRECT]) { | |
696 | vnc_zlog_debug_verbose( | |
697 | "%s: bgp->rfapi_cfg->redist[afi=%d][type=ZEBRA_ROUTE_BGP_DIRECT] is 0, skipping", | |
698 | __func__, afi); | |
699 | return; | |
700 | } | |
701 | ||
702 | /* | |
703 | * mode "plain" specific code | |
704 | */ | |
705 | { | |
706 | vnc_zlog_debug_verbose("%s: NOT using redist RFG", __func__); | |
707 | ||
708 | /* | |
709 | * prefix list check | |
710 | */ | |
711 | if (hc->plist_redist[ZEBRA_ROUTE_BGP_DIRECT][afi]) { | |
712 | vnc_zlog_debug_verbose( | |
713 | "%s: HC prefix list is set, checking", | |
714 | __func__); | |
715 | if (prefix_list_apply( | |
716 | hc->plist_redist[ZEBRA_ROUTE_BGP_DIRECT] | |
717 | [afi], | |
718 | prefix) | |
719 | == PREFIX_DENY) { | |
720 | vnc_zlog_debug_verbose( | |
721 | "%s: prefix list returns DENY, blocking route", | |
722 | __func__); | |
723 | return; | |
724 | } | |
725 | vnc_zlog_debug_verbose( | |
726 | "%s: prefix list returns PASS, allowing route", | |
727 | __func__); | |
728 | } | |
729 | ||
730 | /* apply routemap, if any, later */ | |
731 | rmap = hc->routemap_redist[ZEBRA_ROUTE_BGP_DIRECT]; | |
732 | ||
733 | /* | |
734 | * Incoming prefix is unicast. If v6, it is in multiprotocol | |
735 | * area, | |
736 | * but if v4 it is in attr->nexthop | |
737 | */ | |
738 | rfapiUnicastNexthop2Prefix(afi, attr, &vn_pfx_space); | |
739 | vn_pfx = &vn_pfx_space; | |
740 | ||
741 | /* UN address */ | |
742 | ahr_flags |= RFAPI_AHR_NO_TUNNEL_SUBTLV; | |
743 | } | |
744 | ||
2dbe669b DA |
745 | if (VNC_DEBUG(IMPORT_BGP_ADD_ROUTE)) |
746 | vnc_zlog_debug_any("%s vn_pfx=%pFX", __func__, vn_pfx); | |
d62a17ae | 747 | |
748 | /* | |
749 | * Compute VN address | |
750 | */ | |
751 | if (rfapiQprefix2Raddr(vn_pfx, &vnaddr)) { | |
752 | vnc_zlog_debug_verbose("%s: redist VN invalid, skipping", | |
753 | __func__); | |
754 | return; | |
755 | } | |
756 | ||
757 | /* | |
758 | * route map handling | |
759 | * This code is here because it allocates an interned attr which | |
760 | * must be freed before we return. It's easier to put it after | |
761 | * all of the possible returns above. | |
762 | */ | |
6006b807 | 763 | memset(&hattr, 0, sizeof(hattr)); |
6f4f49b2 QY |
764 | /* hattr becomes a ghost attr */ |
765 | hattr = *attr; | |
d62a17ae | 766 | |
767 | if (rmap) { | |
4b7e6066 | 768 | struct bgp_path_info info; |
d62a17ae | 769 | route_map_result_t ret; |
770 | ||
771 | memset(&info, 0, sizeof(info)); | |
772 | info.peer = peer; | |
773 | info.attr = &hattr; | |
1782514f | 774 | ret = route_map_apply(rmap, prefix, &info); |
d62a17ae | 775 | if (ret == RMAP_DENYMATCH) { |
776 | bgp_attr_flush(&hattr); | |
777 | vnc_zlog_debug_verbose( | |
778 | "%s: route map \"%s\" says DENY, returning", | |
779 | __func__, rmap->name); | |
780 | return; | |
781 | } | |
782 | } | |
783 | ||
784 | iattr = bgp_attr_intern(&hattr); | |
785 | bgp_attr_flush(&hattr); | |
786 | ||
787 | /* Now iattr is an allocated interned attr */ | |
788 | ||
789 | /* | |
790 | * Mode "plain" specific code | |
791 | * | |
792 | * Sets RD in dummy HD | |
793 | * Allocates ecom | |
794 | */ | |
795 | { | |
796 | if (vnaddr.addr_family != AF_INET) { | |
797 | vnc_zlog_debug_verbose( | |
798 | "%s: can't auto-assign RD, VN AF (%d) is not IPv4, skipping", | |
799 | __func__, vnaddr.addr_family); | |
800 | if (iattr) { | |
801 | bgp_attr_unintern(&iattr); | |
802 | } | |
803 | return; | |
804 | } | |
805 | memset(&prd, 0, sizeof(prd)); | |
806 | rfapi_set_autord_from_vn(&prd, &vnaddr); | |
807 | ||
b53e67a3 DA |
808 | if (iattr && bgp_attr_get_ecommunity(iattr)) |
809 | ecom = ecommunity_dup(bgp_attr_get_ecommunity(iattr)); | |
d62a17ae | 810 | } |
811 | ||
812 | local_pref = calc_local_pref(iattr, peer); | |
813 | ||
814 | if (iattr && (iattr->flag & ATTR_FLAG_BIT(BGP_ATTR_MULTI_EXIT_DISC))) { | |
815 | med = &iattr->med; | |
816 | } | |
817 | ||
818 | if (VNC_DEBUG(IMPORT_BGP_ADD_ROUTE)) { | |
872ed4c7 | 819 | char buf[PREFIX_STRLEN]; |
d62a17ae | 820 | |
872ed4c7 | 821 | rfapiRfapiIpAddr2Str(&vnaddr, buf, sizeof(buf)); |
d62a17ae | 822 | vnc_zlog_debug_any("%s: setting vnaddr to %s", __func__, buf); |
823 | } | |
824 | ||
825 | vncHDBgpDirect.peer = peer; | |
826 | add_vnc_route(&vncHDBgpDirect, bgp, SAFI_MPLS_VPN, prefix, &prd, | |
827 | &vnaddr, &local_pref, &(bgp->rfapi_cfg->redist_lifetime), | |
828 | NULL, /* RFP options */ | |
829 | NULL, NULL, ecom, med, /* med */ | |
830 | NULL, /* label: default */ | |
831 | ZEBRA_ROUTE_BGP_DIRECT, BGP_ROUTE_REDISTRIBUTE, | |
832 | ahr_flags); | |
833 | vncHDBgpDirect.peer = NULL; | |
834 | ||
835 | if (ecom) | |
836 | ecommunity_free(&ecom); | |
65efcfce LB |
837 | } |
838 | ||
5a1ae2c2 DS |
839 | static void vnc_import_bgp_add_route_mode_nvegroup( |
840 | struct bgp *bgp, const struct prefix *prefix, | |
841 | struct bgp_path_info *info, struct rfapi_nve_group_cfg *rfg) | |
65efcfce | 842 | { |
d62a17ae | 843 | afi_t afi = family2afi(prefix->family); |
844 | struct peer *peer = info->peer; | |
845 | struct attr *attr = info->attr; | |
846 | struct attr hattr; | |
d62a17ae | 847 | struct attr *iattr = NULL; |
848 | ||
849 | struct rfapi_ip_addr vnaddr; | |
850 | struct prefix *vn_pfx = NULL; | |
851 | int ahr_flags = 0; | |
852 | struct ecommunity *ecom = NULL; | |
853 | struct prefix_rd prd; | |
854 | struct route_map *rmap = NULL; | |
855 | uint32_t local_pref; | |
856 | ||
2dbe669b | 857 | vnc_zlog_debug_verbose("%s(prefix=%pFX) entry", __func__, prefix); |
d62a17ae | 858 | |
859 | assert(rfg); | |
860 | ||
861 | if (!afi) { | |
450971aa | 862 | flog_err(EC_LIB_DEVELOPMENT, "%s: can't get afi of prefix", |
1c50c1c0 | 863 | __func__); |
d62a17ae | 864 | return; |
865 | } | |
866 | ||
3f54c705 | 867 | if (!(bgp->rfapi_cfg)) { |
d62a17ae | 868 | vnc_zlog_debug_verbose("%s: bgp->rfapi_cfg is NULL, skipping", |
869 | __func__); | |
870 | return; | |
871 | } | |
872 | ||
873 | /* check vnc redist flag for bgp direct routes */ | |
874 | if (!bgp->rfapi_cfg->redist[afi][ZEBRA_ROUTE_BGP_DIRECT]) { | |
875 | vnc_zlog_debug_verbose( | |
876 | "%s: bgp->rfapi_cfg->redist[afi=%d][type=ZEBRA_ROUTE_BGP_DIRECT] is 0, skipping", | |
877 | __func__, afi); | |
878 | return; | |
879 | } | |
880 | ||
881 | ||
882 | /* | |
883 | * RFG-specific code | |
884 | */ | |
885 | { | |
886 | ||
887 | struct rfapi_ip_prefix pfx_un; | |
888 | ||
889 | vnc_zlog_debug_verbose("%s: using redist RFG", __func__); | |
890 | ||
891 | /* | |
892 | * RFG prefix list check | |
893 | */ | |
894 | if (rfg->plist_redist[ZEBRA_ROUTE_BGP_DIRECT][afi]) { | |
895 | vnc_zlog_debug_verbose( | |
896 | "%s: RFG prefix list is set, checking", | |
897 | __func__); | |
898 | if (prefix_list_apply( | |
899 | rfg->plist_redist[ZEBRA_ROUTE_BGP_DIRECT] | |
900 | [afi], | |
901 | prefix) | |
902 | == PREFIX_DENY) { | |
903 | vnc_zlog_debug_verbose( | |
904 | "%s: prefix list returns DENY, blocking route", | |
905 | __func__); | |
906 | return; | |
907 | } | |
908 | vnc_zlog_debug_verbose( | |
909 | "%s: prefix list returns PASS, allowing route", | |
910 | __func__); | |
911 | } | |
912 | ||
913 | /* apply routemap, if any, later */ | |
914 | rmap = rfg->routemap_redist[ZEBRA_ROUTE_BGP_DIRECT]; | |
915 | ||
916 | /* | |
917 | * export nve group's VN addr prefix must be a /32 which | |
918 | * will yield the VN addr to use | |
919 | */ | |
920 | vn_pfx = &rfg->vn_prefix; | |
921 | ||
922 | /* | |
923 | * UN Address | |
924 | */ | |
925 | if (!is_host_prefix(&rfg->un_prefix)) { | |
926 | /* NB prefixlen==0 means it has not been configured */ | |
927 | vnc_zlog_debug_verbose( | |
928 | "%s: redist RFG UN pfx not host pfx (plen=%d), skipping", | |
929 | __func__, rfg->un_prefix.prefixlen); | |
930 | return; | |
931 | } | |
932 | ||
933 | rfapiQprefix2Rprefix(&rfg->un_prefix, &pfx_un); | |
934 | ||
935 | vncHDBgpDirect.un_addr = pfx_un.prefix; | |
936 | } | |
937 | ||
2dbe669b DA |
938 | if (VNC_DEBUG(IMPORT_BGP_ADD_ROUTE)) |
939 | vnc_zlog_debug_any("%s vn_pfx=%pFX", __func__, vn_pfx); | |
d62a17ae | 940 | |
941 | /* | |
942 | * Compute VN address | |
943 | */ | |
944 | if (rfapiQprefix2Raddr(vn_pfx, &vnaddr)) { | |
945 | vnc_zlog_debug_verbose("%s: redist VN invalid, skipping", | |
946 | __func__); | |
947 | return; | |
948 | } | |
949 | ||
950 | /* | |
951 | * route map handling | |
952 | * This code is here because it allocates an interned attr which | |
953 | * must be freed before we return. It's easier to put it after | |
954 | * all of the possible returns above. | |
955 | */ | |
6006b807 | 956 | memset(&hattr, 0, sizeof(hattr)); |
6f4f49b2 QY |
957 | /* hattr becomes a ghost attr */ |
958 | hattr = *attr; | |
d62a17ae | 959 | |
960 | if (rmap) { | |
9b6d8fcf | 961 | struct bgp_path_info path; |
d62a17ae | 962 | route_map_result_t ret; |
963 | ||
9b6d8fcf DS |
964 | memset(&path, 0, sizeof(path)); |
965 | path.peer = peer; | |
966 | path.attr = &hattr; | |
1782514f | 967 | ret = route_map_apply(rmap, prefix, &path); |
d62a17ae | 968 | if (ret == RMAP_DENYMATCH) { |
969 | bgp_attr_flush(&hattr); | |
970 | vnc_zlog_debug_verbose( | |
971 | "%s: route map \"%s\" says DENY, returning", | |
972 | __func__, rmap->name); | |
973 | return; | |
974 | } | |
975 | } | |
976 | ||
977 | iattr = bgp_attr_intern(&hattr); | |
978 | bgp_attr_flush(&hattr); | |
979 | ||
980 | /* Now iattr is an allocated interned attr */ | |
981 | ||
982 | /* | |
983 | * RFG-specific code | |
984 | * | |
985 | * Sets RD in dummy HD | |
986 | * Allocates ecom | |
987 | */ | |
988 | { | |
989 | ||
990 | memset(&prd, 0, sizeof(prd)); | |
991 | prd = rfg->rd; | |
992 | prd.family = AF_UNSPEC; | |
993 | prd.prefixlen = 64; | |
994 | ||
995 | if (rfg->rd.family == AF_UNIX) { | |
996 | rfapi_set_autord_from_vn(&prd, &vnaddr); | |
997 | } | |
998 | ||
999 | if (rfg->rt_export_list) | |
1000 | ecom = ecommunity_dup( | |
1001 | bgp->rfapi_cfg->rfg_redist->rt_export_list); | |
1002 | else | |
1003 | ecom = ecommunity_new(); | |
1004 | ||
b53e67a3 DA |
1005 | if (iattr && bgp_attr_get_ecommunity(iattr)) |
1006 | ecom = ecommunity_merge(ecom, | |
1007 | bgp_attr_get_ecommunity(iattr)); | |
d62a17ae | 1008 | } |
1009 | ||
1010 | local_pref = calc_local_pref(iattr, peer); | |
1011 | ||
1012 | if (VNC_DEBUG(IMPORT_BGP_ADD_ROUTE)) { | |
1013 | char buf[BUFSIZ]; | |
1014 | ||
1015 | buf[0] = 0; | |
1016 | rfapiRfapiIpAddr2Str(&vnaddr, buf, BUFSIZ); | |
1017 | buf[BUFSIZ - 1] = 0; | |
1018 | vnc_zlog_debug_any("%s: setting vnaddr to %s", __func__, buf); | |
1019 | } | |
1020 | ||
1021 | vncHDBgpDirect.peer = peer; | |
1022 | add_vnc_route(&vncHDBgpDirect, bgp, SAFI_MPLS_VPN, prefix, &prd, | |
1023 | &vnaddr, &local_pref, &(bgp->rfapi_cfg->redist_lifetime), | |
1024 | NULL, /* RFP options */ | |
1025 | NULL, NULL, ecom, NULL, /* med */ | |
1026 | NULL, /* label: default */ | |
1027 | ZEBRA_ROUTE_BGP_DIRECT, BGP_ROUTE_REDISTRIBUTE, | |
1028 | ahr_flags); | |
1029 | vncHDBgpDirect.peer = NULL; | |
1030 | ||
1031 | if (ecom) | |
1032 | ecommunity_free(&ecom); | |
65efcfce LB |
1033 | } |
1034 | ||
d62a17ae | 1035 | static void vnc_import_bgp_del_route_mode_plain(struct bgp *bgp, |
5a1ae2c2 | 1036 | const struct prefix *prefix, |
4b7e6066 | 1037 | struct bgp_path_info *info) |
65efcfce | 1038 | { |
d62a17ae | 1039 | struct prefix_rd prd; |
1040 | afi_t afi = family2afi(prefix->family); | |
1041 | struct prefix *vn_pfx = NULL; | |
1042 | struct rfapi_ip_addr vnaddr; | |
1043 | struct prefix vn_pfx_space; | |
1044 | ||
1045 | ||
1046 | assert(afi); | |
1047 | ||
1048 | /* | |
1049 | * Compute VN address | |
1050 | */ | |
1051 | ||
05864da7 | 1052 | if (info) { |
d62a17ae | 1053 | rfapiUnicastNexthop2Prefix(afi, info->attr, &vn_pfx_space); |
1054 | } else { | |
1055 | vnc_zlog_debug_verbose("%s: no attr, can't delete route", | |
1056 | __func__); | |
1057 | return; | |
1058 | } | |
1059 | vn_pfx = &vn_pfx_space; | |
1060 | ||
1061 | vnaddr.addr_family = vn_pfx->family; | |
1062 | switch (vn_pfx->family) { | |
1063 | case AF_INET: | |
12256b84 | 1064 | if (vn_pfx->prefixlen != IPV4_MAX_BITLEN) { |
d62a17ae | 1065 | vnc_zlog_debug_verbose( |
1066 | "%s: redist VN plen (%d) != 32, skipping", | |
1067 | __func__, vn_pfx->prefixlen); | |
1068 | return; | |
1069 | } | |
1070 | vnaddr.addr.v4 = vn_pfx->u.prefix4; | |
1071 | break; | |
1072 | ||
1073 | case AF_INET6: | |
13ccce6e | 1074 | if (vn_pfx->prefixlen != IPV6_MAX_BITLEN) { |
d62a17ae | 1075 | vnc_zlog_debug_verbose( |
1076 | "%s: redist VN plen (%d) != 128, skipping", | |
1077 | __func__, vn_pfx->prefixlen); | |
1078 | return; | |
1079 | } | |
1080 | vnaddr.addr.v6 = vn_pfx->u.prefix6; | |
1081 | break; | |
1082 | ||
1083 | default: | |
1084 | vnc_zlog_debug_verbose( | |
1085 | "%s: no redist RFG VN host pfx configured, skipping", | |
1086 | __func__); | |
1087 | return; | |
1088 | } | |
1089 | ||
1090 | ||
1091 | memset(&prd, 0, sizeof(prd)); | |
1092 | if (rfapi_set_autord_from_vn(&prd, &vnaddr)) { | |
1093 | vnc_zlog_debug_verbose("%s: can't auto-assign RD, skipping", | |
1094 | __func__); | |
1095 | return; | |
1096 | } | |
1097 | ||
1098 | vncHDBgpDirect.peer = info->peer; | |
1099 | vnc_zlog_debug_verbose("%s: setting peer to %p", __func__, | |
1100 | vncHDBgpDirect.peer); | |
1101 | del_vnc_route(&vncHDBgpDirect, info->peer, bgp, SAFI_MPLS_VPN, prefix, | |
1102 | &prd, ZEBRA_ROUTE_BGP_DIRECT, BGP_ROUTE_REDISTRIBUTE, | |
1103 | NULL, 1); | |
1104 | ||
1105 | vncHDBgpDirect.peer = NULL; | |
65efcfce LB |
1106 | } |
1107 | ||
d62a17ae | 1108 | static void vnc_import_bgp_del_route_mode_nvegroup(struct bgp *bgp, |
5a1ae2c2 | 1109 | const struct prefix *prefix, |
4b7e6066 | 1110 | struct bgp_path_info *info) |
65efcfce | 1111 | { |
d62a17ae | 1112 | struct prefix_rd prd; |
1113 | afi_t afi = family2afi(prefix->family); | |
1114 | struct rfapi_nve_group_cfg *rfg = NULL; | |
1115 | struct prefix *vn_pfx = NULL; | |
1116 | struct rfapi_ip_addr vnaddr; | |
1117 | ||
1118 | ||
1119 | assert(afi); | |
1120 | ||
2ad7c8ec DS |
1121 | rfg = bgp->rfapi_cfg->rfg_redist; |
1122 | assert(rfg); | |
d62a17ae | 1123 | |
1124 | /* | |
1125 | * Compute VN address | |
1126 | */ | |
1127 | ||
1128 | /* | |
1129 | * export nve group's VN addr prefix must be a /32 which | |
1130 | * will yield the VN addr to use | |
1131 | */ | |
1132 | vn_pfx = &rfg->vn_prefix; | |
1133 | ||
1134 | ||
1135 | vnaddr.addr_family = vn_pfx->family; | |
1136 | switch (vn_pfx->family) { | |
1137 | case AF_INET: | |
12256b84 | 1138 | if (vn_pfx->prefixlen != IPV4_MAX_BITLEN) { |
d62a17ae | 1139 | vnc_zlog_debug_verbose( |
1140 | "%s: redist VN plen (%d) != 32, skipping", | |
1141 | __func__, vn_pfx->prefixlen); | |
1142 | return; | |
1143 | } | |
1144 | vnaddr.addr.v4 = vn_pfx->u.prefix4; | |
1145 | break; | |
1146 | ||
1147 | case AF_INET6: | |
13ccce6e | 1148 | if (vn_pfx->prefixlen != IPV6_MAX_BITLEN) { |
d62a17ae | 1149 | vnc_zlog_debug_verbose( |
1150 | "%s: redist VN plen (%d) != 128, skipping", | |
1151 | __func__, vn_pfx->prefixlen); | |
1152 | return; | |
1153 | } | |
1154 | vnaddr.addr.v6 = vn_pfx->u.prefix6; | |
1155 | break; | |
1156 | ||
1157 | default: | |
1158 | vnc_zlog_debug_verbose( | |
1159 | "%s: no redist RFG VN host pfx configured, skipping", | |
1160 | __func__); | |
1161 | return; | |
1162 | } | |
1163 | ||
1164 | memset(&prd, 0, sizeof(prd)); | |
1165 | prd = rfg->rd; | |
1166 | prd.family = AF_UNSPEC; | |
1167 | prd.prefixlen = 64; | |
1168 | ||
1169 | if (rfg->rd.family == AF_UNIX) { | |
1170 | /* means "auto" with VN addr */ | |
1171 | if (rfapi_set_autord_from_vn(&prd, &vnaddr)) { | |
1172 | vnc_zlog_debug_verbose( | |
1173 | "%s: can't auto-assign RD, skipping", __func__); | |
1174 | return; | |
1175 | } | |
1176 | } | |
1177 | ||
1178 | ||
1179 | vncHDBgpDirect.peer = info->peer; | |
1180 | vnc_zlog_debug_verbose("%s: setting peer to %p", __func__, | |
1181 | vncHDBgpDirect.peer); | |
1182 | del_vnc_route(&vncHDBgpDirect, info->peer, bgp, SAFI_MPLS_VPN, prefix, | |
1183 | &prd, ZEBRA_ROUTE_BGP_DIRECT, BGP_ROUTE_REDISTRIBUTE, | |
1184 | NULL, 1); | |
1185 | ||
1186 | vncHDBgpDirect.peer = NULL; | |
65efcfce LB |
1187 | } |
1188 | ||
d62a17ae | 1189 | static void vnc_import_bgp_del_route_mode_resolve_nve_one_bi( |
40381db7 DS |
1190 | struct bgp *bgp, afi_t afi, struct bgp_path_info *bpi, /* VPN bpi */ |
1191 | struct prefix_rd *prd, /* RD */ | |
5a1ae2c2 | 1192 | const struct prefix *prefix) /* unicast route prefix */ |
65efcfce | 1193 | { |
d62a17ae | 1194 | struct prefix un; |
1195 | ||
40381db7 DS |
1196 | if (bpi->type != ZEBRA_ROUTE_BGP |
1197 | && bpi->type != ZEBRA_ROUTE_BGP_DIRECT) { | |
65efcfce | 1198 | |
d62a17ae | 1199 | return; |
1200 | } | |
40381db7 DS |
1201 | if (bpi->sub_type != BGP_ROUTE_NORMAL |
1202 | && bpi->sub_type != BGP_ROUTE_STATIC | |
1203 | && bpi->sub_type != BGP_ROUTE_RFP) { | |
d62a17ae | 1204 | |
1205 | return; | |
1206 | } | |
40381db7 | 1207 | if (CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED)) |
d62a17ae | 1208 | return; |
1209 | ||
40381db7 DS |
1210 | vncHDResolveNve.peer = bpi->peer; |
1211 | if (!rfapiGetVncTunnelUnAddr(bpi->attr, &un)) { | |
d62a17ae | 1212 | if (rfapiQprefix2Raddr(&un, &vncHDResolveNve.un_addr)) |
1213 | return; | |
1214 | } else { | |
1215 | memset(&vncHDResolveNve.un_addr, 0, | |
1216 | sizeof(vncHDResolveNve.un_addr)); | |
1217 | } | |
1218 | ||
1219 | del_vnc_route(&vncHDResolveNve, vncHDResolveNve.peer, bgp, | |
1220 | SAFI_MPLS_VPN, prefix, /* unicast route prefix */ | |
1221 | prd, ZEBRA_ROUTE_BGP_DIRECT, BGP_ROUTE_REDISTRIBUTE, NULL, | |
1222 | 0); /* flags */ | |
65efcfce LB |
1223 | } |
1224 | ||
d62a17ae | 1225 | static void vnc_import_bgp_del_route_mode_resolve_nve_one_rd( |
1226 | struct prefix_rd *prd, | |
1227 | struct bgp_table *table_rd, /* per-rd VPN route table */ | |
5a1ae2c2 DS |
1228 | afi_t afi, struct bgp *bgp, |
1229 | const struct prefix *prefix, /* unicast prefix */ | |
1230 | const struct prefix *ubpi_nexthop) /* unicast bpi's nexthop */ | |
65efcfce | 1231 | { |
9bcb3eef | 1232 | struct bgp_dest *bd; |
40381db7 | 1233 | struct bgp_path_info *bpi; |
65efcfce | 1234 | |
d62a17ae | 1235 | if (!table_rd) |
1236 | return; | |
65efcfce | 1237 | |
2dbe669b | 1238 | vnc_zlog_debug_verbose("%s: ubpi_nexthop=%pFX", __func__, ubpi_nexthop); |
65efcfce LB |
1239 | |
1240 | ||
d62a17ae | 1241 | /* exact match */ |
9bcb3eef DS |
1242 | bd = bgp_node_lookup(table_rd, ubpi_nexthop); |
1243 | if (!bd) { | |
d62a17ae | 1244 | vnc_zlog_debug_verbose( |
40381db7 DS |
1245 | "%s: no match in RD's table for ubpi_nexthop", |
1246 | __func__); | |
d62a17ae | 1247 | return; |
1248 | } | |
65efcfce | 1249 | |
6f94b685 | 1250 | /* Iterate over bgp_info items at this node */ |
9bcb3eef | 1251 | for (bpi = bgp_dest_get_bgp_path_info(bd); bpi; bpi = bpi->next) { |
65efcfce | 1252 | |
d62a17ae | 1253 | vnc_import_bgp_del_route_mode_resolve_nve_one_bi( |
40381db7 DS |
1254 | bgp, afi, bpi, /* VPN bpi */ |
1255 | prd, /* VPN RD */ | |
1256 | prefix); /* unicast route prefix */ | |
d62a17ae | 1257 | } |
65efcfce | 1258 | |
9bcb3eef | 1259 | bgp_dest_unlock_node(bd); |
65efcfce LB |
1260 | } |
1261 | ||
4b7e6066 DS |
1262 | static void |
1263 | vnc_import_bgp_del_route_mode_resolve_nve(struct bgp *bgp, afi_t afi, | |
5a1ae2c2 | 1264 | const struct prefix *prefix, |
4b7e6066 | 1265 | struct bgp_path_info *info) |
65efcfce | 1266 | { |
d62a17ae | 1267 | struct ecommunity *ecom = NULL; |
1268 | struct prefix pfx_unicast_nexthop = {0}; /* happy valgrind */ | |
1269 | ||
1270 | // struct listnode *hnode; | |
1271 | // struct rfapi_descriptor *rfd; | |
1272 | struct prefix_bag *pb; | |
1273 | void *cursor; | |
1274 | struct skiplist *sl = bgp->rfapi->resolve_nve_nexthop; | |
1275 | int rc; | |
9bcb3eef | 1276 | struct bgp_dest *bdp; /* prd table node */ |
d62a17ae | 1277 | |
1278 | if (!sl) { | |
1279 | vnc_zlog_debug_verbose("%s: no RHN entries, skipping", | |
1280 | __func__); | |
1281 | return; | |
1282 | } | |
65efcfce | 1283 | |
d62a17ae | 1284 | if (info->type != ZEBRA_ROUTE_BGP) { |
1285 | vnc_zlog_debug_verbose( | |
1286 | "%s: unicast type %d=\"%s\" is not %d=%s, skipping", | |
1287 | __func__, info->type, zebra_route_string(info->type), | |
1288 | ZEBRA_ROUTE_BGP, "ZEBRA_ROUTE_BGP"); | |
1289 | return; | |
1290 | } | |
65efcfce | 1291 | |
d62a17ae | 1292 | if (process_unicast_route(bgp, afi, prefix, info, &ecom, |
1293 | &pfx_unicast_nexthop)) { | |
1294 | ||
1295 | vnc_zlog_debug_verbose( | |
1296 | "%s: process_unicast_route error, skipping", __func__); | |
1297 | return; | |
1298 | } | |
1299 | ||
1300 | rc = skiplist_first_value(sl, &pfx_unicast_nexthop, (void *)&pb, | |
1301 | &cursor); | |
1302 | while (!rc) { | |
40381db7 | 1303 | if (pb->ubpi == info) { |
d62a17ae | 1304 | skiplist_delete(sl, &pfx_unicast_nexthop, pb); |
18ee8310 | 1305 | bgp_path_info_unlock(info); |
d62a17ae | 1306 | break; |
1307 | } | |
1308 | rc = skiplist_next_value(sl, &pfx_unicast_nexthop, (void *)&pb, | |
1309 | &cursor); | |
1310 | } | |
1311 | ||
1312 | /* | |
1313 | * Iterate over RDs in VPN RIB. For each RD, look up unicast nexthop | |
1314 | * (exact match, /32). If an exact match is found, call add_vnc_route. | |
1315 | */ | |
1316 | ||
9bcb3eef DS |
1317 | for (bdp = bgp_table_top(bgp->rib[afi][SAFI_MPLS_VPN]); bdp; |
1318 | bdp = bgp_route_next(bdp)) { | |
d62a17ae | 1319 | |
1320 | struct bgp_table *table; | |
1321 | ||
9bcb3eef | 1322 | table = bgp_dest_get_bgp_table_info(bdp); |
d62a17ae | 1323 | |
1324 | if (!table) | |
1325 | continue; | |
1326 | ||
1327 | vnc_import_bgp_del_route_mode_resolve_nve_one_rd( | |
9bcb3eef | 1328 | (struct prefix_rd *)bgp_dest_get_prefix(bdp), table, |
b54892e0 | 1329 | afi, bgp, prefix, &pfx_unicast_nexthop); |
d62a17ae | 1330 | } |
1331 | ||
1332 | if (ecom) | |
1333 | ecommunity_free(&ecom); | |
1334 | } | |
65efcfce LB |
1335 | |
1336 | ||
1337 | /*********************************************************************** | |
1338 | * Add/Delete CE->NVE routes | |
1339 | ***********************************************************************/ | |
1340 | ||
1341 | /* | |
40381db7 | 1342 | * Should be called whan a bpi is added to VPN RIB. This function |
65efcfce LB |
1343 | * will check if it is a host route and return immediately if not. |
1344 | */ | |
d62a17ae | 1345 | void vnc_import_bgp_add_vnc_host_route_mode_resolve_nve( |
1346 | struct bgp *bgp, struct prefix_rd *prd, /* RD */ | |
1347 | struct bgp_table *table_rd, /* per-rd VPN route table */ | |
5a1ae2c2 | 1348 | const struct prefix *prefix, /* VPN prefix */ |
40381db7 | 1349 | struct bgp_path_info *bpi) /* new VPN host route */ |
65efcfce | 1350 | { |
d62a17ae | 1351 | afi_t afi = family2afi(prefix->family); |
1352 | struct skiplist *sl = NULL; | |
1353 | int rc; | |
1354 | struct prefix_bag *pb; | |
1355 | void *cursor; | |
1356 | struct rfapi_cfg *hc = NULL; | |
1357 | ||
1358 | vnc_zlog_debug_verbose("%s: entry", __func__); | |
1359 | ||
1360 | if (afi != AFI_IP && afi != AFI_IP6) { | |
1361 | vnc_zlog_debug_verbose("%s: bad afi %d, skipping", __func__, | |
1362 | afi); | |
1363 | return; | |
1364 | } | |
1365 | ||
1366 | if (!(hc = bgp->rfapi_cfg)) { | |
1367 | vnc_zlog_debug_verbose("%s: bgp->rfapi_cfg is NULL, skipping", | |
1368 | __func__); | |
1369 | return; | |
1370 | } | |
65efcfce | 1371 | |
d62a17ae | 1372 | /* check vnc redist flag for bgp direct routes */ |
1373 | if (!hc->redist[afi][ZEBRA_ROUTE_BGP_DIRECT]) { | |
1374 | vnc_zlog_debug_verbose( | |
1375 | "%s: bgp->rfapi_cfg->redist[afi=%d][type=ZEBRA_ROUTE_BGP_DIRECT] is 0, skipping", | |
1376 | __func__, afi); | |
1377 | return; | |
1378 | } | |
65efcfce | 1379 | |
d62a17ae | 1380 | if (hc->redist_mode != VNC_REDIST_MODE_RESOLVE_NVE) { |
1381 | vnc_zlog_debug_verbose("%s: not in resolve-nve mode, skipping", | |
1382 | __func__); | |
1383 | return; | |
65efcfce LB |
1384 | } |
1385 | ||
8cea9547 | 1386 | if (bgp->rfapi) |
d62a17ae | 1387 | sl = bgp->rfapi->resolve_nve_nexthop; |
1388 | ||
1389 | if (!sl) { | |
1390 | vnc_zlog_debug_verbose( | |
1391 | "%s: no resolve_nve_nexthop skiplist, skipping", | |
1392 | __func__); | |
1393 | return; | |
1394 | } | |
1395 | ||
1396 | if (!is_host_prefix(prefix)) { | |
1397 | vnc_zlog_debug_verbose("%s: not host prefix, skipping", | |
1398 | __func__); | |
1399 | return; | |
1400 | } | |
1401 | ||
1402 | rc = skiplist_first_value(sl, prefix, (void *)&pb, &cursor); | |
1403 | while (!rc) { | |
1404 | struct ecommunity *ecom; | |
1405 | struct prefix pfx_unicast_nexthop; | |
1406 | uint32_t *med = NULL; | |
1407 | uint32_t local_pref; | |
1408 | ||
1409 | memset(&pfx_unicast_nexthop, 0, | |
6006b807 | 1410 | sizeof(pfx_unicast_nexthop)); /* keep valgrind happy */ |
d62a17ae | 1411 | |
2dbe669b | 1412 | if (VNC_DEBUG(IMPORT_BGP_ADD_ROUTE)) |
d62a17ae | 1413 | vnc_zlog_debug_any( |
2dbe669b DA |
1414 | "%s: examining RHN Entry (q=%p): upfx=%pFX, hpfx=%pFX, ubpi=%p", |
1415 | __func__, cursor, &pb->upfx, &pb->hpfx, | |
1416 | pb->ubpi); | |
65efcfce | 1417 | |
40381db7 | 1418 | if (process_unicast_route(bgp, afi, &pb->upfx, pb->ubpi, &ecom, |
d62a17ae | 1419 | &pfx_unicast_nexthop)) { |
65efcfce | 1420 | |
d62a17ae | 1421 | vnc_zlog_debug_verbose( |
1422 | "%s: process_unicast_route error, skipping", | |
1423 | __func__); | |
1424 | continue; | |
1425 | } | |
40381db7 | 1426 | local_pref = calc_local_pref(pb->ubpi->attr, pb->ubpi->peer); |
65efcfce | 1427 | |
05864da7 DS |
1428 | if (pb->ubpi->attr->flag |
1429 | & ATTR_FLAG_BIT(BGP_ATTR_MULTI_EXIT_DISC)) | |
40381db7 | 1430 | med = &pb->ubpi->attr->med; |
65efcfce | 1431 | |
d62a17ae | 1432 | /* |
1433 | * Sanity check | |
1434 | */ | |
1435 | if (vnc_prefix_cmp(&pfx_unicast_nexthop, prefix)) { | |
d62a17ae | 1436 | vnc_zlog_debug_verbose( |
2dbe669b DA |
1437 | "%s: FATAL: resolve_nve_nexthop list item bpi nexthop %pFX != nve pfx %pFX", |
1438 | __func__, &pfx_unicast_nexthop, prefix); | |
d62a17ae | 1439 | assert(0); |
1440 | } | |
1441 | ||
1442 | vnc_import_bgp_add_route_mode_resolve_nve_one_bi( | |
40381db7 | 1443 | bgp, afi, bpi, /* VPN bpi */ |
d62a17ae | 1444 | prd, &pb->upfx, /* unicast prefix */ |
1445 | &local_pref, med, ecom); | |
1446 | ||
1447 | if (ecom) | |
1448 | ecommunity_free(&ecom); | |
65efcfce LB |
1449 | |
1450 | #if DEBUG_RHN_LIST | |
d62a17ae | 1451 | /* debug */ |
1452 | { | |
d62a17ae | 1453 | vnc_zlog_debug_verbose( |
2dbe669b DA |
1454 | "%s: advancing past RHN Entry (q=%p): with prefix %pFX", |
1455 | __func__, cursor, prefix); | |
d62a17ae | 1456 | print_rhn_list(__func__, NULL); /* debug */ |
1457 | } | |
65efcfce | 1458 | #endif |
d62a17ae | 1459 | rc = skiplist_next_value(sl, prefix, (void *)&pb, &cursor); |
1460 | } | |
1461 | vnc_zlog_debug_verbose("%s: done", __func__); | |
65efcfce LB |
1462 | } |
1463 | ||
1464 | ||
d62a17ae | 1465 | void vnc_import_bgp_del_vnc_host_route_mode_resolve_nve( |
1466 | struct bgp *bgp, struct prefix_rd *prd, /* RD */ | |
1467 | struct bgp_table *table_rd, /* per-rd VPN route table */ | |
5a1ae2c2 | 1468 | const struct prefix *prefix, /* VPN prefix */ |
40381db7 | 1469 | struct bgp_path_info *bpi) /* old VPN host route */ |
65efcfce | 1470 | { |
d62a17ae | 1471 | afi_t afi = family2afi(prefix->family); |
1472 | struct skiplist *sl = NULL; | |
1473 | struct prefix_bag *pb; | |
1474 | void *cursor; | |
1475 | struct rfapi_cfg *hc = NULL; | |
1476 | int rc; | |
1477 | ||
2dbe669b DA |
1478 | vnc_zlog_debug_verbose("%s(bgp=%p, nve prefix=%pFX)", __func__, bgp, |
1479 | prefix); | |
d62a17ae | 1480 | |
1481 | if (afi != AFI_IP && afi != AFI_IP6) | |
1482 | return; | |
1483 | ||
1484 | if (!(hc = bgp->rfapi_cfg)) { | |
1485 | vnc_zlog_debug_verbose("%s: bgp->rfapi_cfg is NULL, skipping", | |
1486 | __func__); | |
1487 | return; | |
1488 | } | |
1489 | ||
1490 | /* check vnc redist flag for bgp direct routes */ | |
1491 | if (!hc->redist[afi][ZEBRA_ROUTE_BGP_DIRECT]) { | |
1492 | vnc_zlog_debug_verbose( | |
1493 | "%s: bgp->rfapi_cfg->redist[afi=%d][type=ZEBRA_ROUTE_BGP_DIRECT] is 0, skipping", | |
1494 | __func__, afi); | |
1495 | return; | |
1496 | } | |
1497 | ||
1498 | if (hc->redist_mode != VNC_REDIST_MODE_RESOLVE_NVE) { | |
1499 | vnc_zlog_debug_verbose("%s: not in resolve-nve mode, skipping", | |
1500 | __func__); | |
1501 | return; | |
1502 | } | |
1503 | ||
8cea9547 | 1504 | if (bgp->rfapi) |
d62a17ae | 1505 | sl = bgp->rfapi->resolve_nve_nexthop; |
1506 | ||
1507 | if (!sl) { | |
1508 | vnc_zlog_debug_verbose("%s: no RHN entries, skipping", | |
1509 | __func__); | |
1510 | return; | |
1511 | } | |
1512 | ||
1513 | if (!is_host_prefix(prefix)) { | |
1514 | vnc_zlog_debug_verbose("%s: not host route, skip", __func__); | |
1515 | return; | |
1516 | } | |
1517 | ||
1518 | /* | |
1519 | * Find all entries with key == CE in the RHN list | |
1520 | */ | |
1521 | rc = skiplist_first_value(sl, prefix, (void *)&pb, &cursor); | |
1522 | while (!rc) { | |
1523 | ||
1524 | struct ecommunity *ecom; | |
1525 | struct prefix pfx_unicast_nexthop; | |
1526 | ||
1527 | memset(&pfx_unicast_nexthop, 0, | |
6006b807 | 1528 | sizeof(pfx_unicast_nexthop)); /* keep valgrind happy */ |
d62a17ae | 1529 | |
40381db7 | 1530 | if (process_unicast_route(bgp, afi, &pb->upfx, pb->ubpi, &ecom, |
d62a17ae | 1531 | &pfx_unicast_nexthop)) { |
1532 | ||
1533 | vnc_zlog_debug_verbose( | |
1534 | "%s: process_unicast_route error, skipping", | |
1535 | __func__); | |
1536 | continue; | |
1537 | } | |
1538 | ||
1539 | /* | |
1540 | * Sanity check | |
1541 | */ | |
1542 | if (vnc_prefix_cmp(&pfx_unicast_nexthop, prefix)) { | |
d62a17ae | 1543 | vnc_zlog_debug_verbose( |
2dbe669b DA |
1544 | "%s: FATAL: resolve_nve_nexthop list item bpi nexthop %pFX != nve pfx %pFX", |
1545 | __func__, &pfx_unicast_nexthop, prefix); | |
d62a17ae | 1546 | assert(0); |
1547 | } | |
1548 | ||
1549 | vnc_import_bgp_del_route_mode_resolve_nve_one_bi( | |
40381db7 | 1550 | bgp, afi, bpi, prd, &pb->upfx); |
d62a17ae | 1551 | |
1552 | if (ecom) | |
1553 | ecommunity_free(&ecom); | |
1554 | ||
1555 | rc = skiplist_next_value(sl, prefix, (void *)&pb, &cursor); | |
1556 | } | |
65efcfce LB |
1557 | } |
1558 | ||
1559 | ||
1560 | /*********************************************************************** | |
1561 | * Exterior Routes | |
1562 | ***********************************************************************/ | |
1563 | ||
1564 | #define DEBUG_IS_USABLE_INTERIOR 1 | |
1565 | ||
40381db7 | 1566 | static int is_usable_interior_route(struct bgp_path_info *bpi_interior) |
65efcfce | 1567 | { |
40381db7 | 1568 | if (!VALID_INTERIOR_TYPE(bpi_interior->type)) { |
65efcfce | 1569 | #if DEBUG_IS_USABLE_INTERIOR |
d62a17ae | 1570 | vnc_zlog_debug_verbose( |
1571 | "%s: NO: type %d is not valid interior type", __func__, | |
40381db7 | 1572 | bpi_interior->type); |
65efcfce | 1573 | #endif |
d62a17ae | 1574 | return 0; |
1575 | } | |
40381db7 | 1576 | if (!CHECK_FLAG(bpi_interior->flags, BGP_PATH_VALID)) { |
65efcfce | 1577 | #if DEBUG_IS_USABLE_INTERIOR |
1defdda8 | 1578 | vnc_zlog_debug_verbose("%s: NO: BGP_PATH_VALID not set", |
d62a17ae | 1579 | __func__); |
65efcfce | 1580 | #endif |
d62a17ae | 1581 | return 0; |
1582 | } | |
1583 | return 1; | |
65efcfce LB |
1584 | } |
1585 | ||
1586 | /* | |
1587 | * There should be only one of these per prefix at a time. | |
1588 | * This should be called as a result of selection operation | |
1589 | * | |
1590 | * NB should be called espacially for bgp instances that are named, | |
1591 | * because the exterior routes will always come from one of those. | |
1592 | * We filter here on the instance name to make sure we get only the | |
1593 | * right routes. | |
1594 | */ | |
d62a17ae | 1595 | static void vnc_import_bgp_exterior_add_route_it( |
1596 | struct bgp *bgp, /* exterior instance, we hope */ | |
5a1ae2c2 DS |
1597 | const struct prefix *prefix, /* unicast prefix */ |
1598 | struct bgp_path_info *info, /* unicast info */ | |
d62a17ae | 1599 | struct rfapi_import_table *it_only) /* NULL, or limit to this IT */ |
65efcfce | 1600 | { |
d62a17ae | 1601 | struct rfapi *h; |
1602 | struct rfapi_cfg *hc; | |
1603 | struct prefix pfx_orig_nexthop; | |
1604 | struct rfapi_import_table *it; | |
1605 | struct bgp *bgp_default = bgp_get_default(); | |
1606 | afi_t afi = family2afi(prefix->family); | |
1607 | ||
1608 | if (!bgp_default) | |
1609 | return; | |
1610 | ||
1611 | h = bgp_default->rfapi; | |
1612 | hc = bgp_default->rfapi_cfg; | |
1613 | ||
1614 | vnc_zlog_debug_verbose("%s: entry with it=%p", __func__, it_only); | |
1615 | ||
1616 | if (!h || !hc) { | |
1617 | vnc_zlog_debug_verbose( | |
1618 | "%s: rfapi or rfapi_cfg not instantiated, skipping", | |
1619 | __func__); | |
1620 | return; | |
1621 | } | |
1622 | if (!hc->redist_bgp_exterior_view) { | |
1623 | vnc_zlog_debug_verbose("%s: exterior view not set, skipping", | |
1624 | __func__); | |
1625 | return; | |
1626 | } | |
1627 | if (bgp != hc->redist_bgp_exterior_view) { | |
1628 | vnc_zlog_debug_verbose( | |
1629 | "%s: bgp %p != hc->redist_bgp_exterior_view %p, skipping", | |
1630 | __func__, bgp, hc->redist_bgp_exterior_view); | |
1631 | return; | |
1632 | } | |
1633 | ||
1634 | if (!hc->redist[afi][ZEBRA_ROUTE_BGP_DIRECT_EXT]) { | |
1635 | vnc_zlog_debug_verbose( | |
1636 | "%s: redist of exterior routes not enabled, skipping", | |
1637 | __func__); | |
1638 | return; | |
1639 | } | |
1640 | ||
d62a17ae | 1641 | /* |
1642 | * Extract nexthop from exterior route | |
1643 | * | |
1644 | * Incoming prefix is unicast. If v6, it is in multiprotocol area, | |
1645 | * but if v4 it is in attr->nexthop | |
1646 | */ | |
1647 | rfapiUnicastNexthop2Prefix(afi, info->attr, &pfx_orig_nexthop); | |
1648 | ||
1649 | for (it = h->imports; it; it = it->next) { | |
fe08ba7e DS |
1650 | struct agg_table *table; |
1651 | struct agg_node *rn; | |
1652 | struct agg_node *par; | |
40381db7 | 1653 | struct bgp_path_info *bpi_interior; |
d62a17ae | 1654 | int have_usable_route; |
1655 | ||
1656 | vnc_zlog_debug_verbose("%s: doing it %p", __func__, it); | |
1657 | ||
1658 | if (it_only && (it_only != it)) { | |
1659 | vnc_zlog_debug_verbose("%s: doesn't match it_only %p", | |
1660 | __func__, it_only); | |
1661 | continue; | |
1662 | } | |
1663 | ||
1664 | table = it->imported_vpn[afi]; | |
1665 | ||
fe08ba7e | 1666 | for (rn = agg_node_match(table, &pfx_orig_nexthop), |
d62a17ae | 1667 | have_usable_route = 0; |
1668 | (!have_usable_route) && rn;) { | |
1669 | ||
1670 | vnc_zlog_debug_verbose("%s: it %p trying rn %p", | |
1671 | __func__, it, rn); | |
1672 | ||
40381db7 DS |
1673 | for (bpi_interior = rn->info; bpi_interior; |
1674 | bpi_interior = bpi_interior->next) { | |
d62a17ae | 1675 | struct prefix_rd *prd; |
1676 | struct attr new_attr; | |
d7c0a89a | 1677 | uint32_t label = 0; |
d62a17ae | 1678 | |
40381db7 | 1679 | if (!is_usable_interior_route(bpi_interior)) |
d62a17ae | 1680 | continue; |
1681 | ||
1682 | vnc_zlog_debug_verbose( | |
40381db7 DS |
1683 | "%s: usable: bpi_interior %p", __func__, |
1684 | bpi_interior); | |
d62a17ae | 1685 | |
1686 | /* | |
1687 | * have a legitimate route to exterior's nexthop | |
1688 | * via NVE. | |
1689 | * | |
1690 | * Import unicast route to the import table | |
1691 | */ | |
1692 | have_usable_route = 1; | |
1693 | ||
40381db7 DS |
1694 | if (bpi_interior->extra) { |
1695 | prd = &bpi_interior->extra->vnc.import | |
d62a17ae | 1696 | .rd; |
1697 | label = decode_label( | |
40381db7 | 1698 | &bpi_interior->extra->label[0]); |
d62a17ae | 1699 | } else |
1700 | prd = NULL; | |
1701 | ||
1702 | /* use local_pref from unicast route */ | |
6006b807 | 1703 | memset(&new_attr, 0, sizeof(new_attr)); |
6f4f49b2 | 1704 | new_attr = *bpi_interior->attr; |
d62a17ae | 1705 | if (info->attr->flag |
1706 | & ATTR_FLAG_BIT(BGP_ATTR_LOCAL_PREF)) { | |
1707 | new_attr.local_pref = | |
1708 | info->attr->local_pref; | |
1709 | new_attr.flag |= ATTR_FLAG_BIT( | |
1710 | BGP_ATTR_LOCAL_PREF); | |
1711 | } | |
1712 | ||
1713 | rfapiBgpInfoFilteredImportVPN( | |
1714 | it, FIF_ACTION_UPDATE, | |
40381db7 | 1715 | bpi_interior->peer, NULL, /* rfd */ |
d62a17ae | 1716 | prefix, NULL, afi, prd, &new_attr, |
1717 | ZEBRA_ROUTE_BGP_DIRECT_EXT, | |
1718 | BGP_ROUTE_REDISTRIBUTE, &label); | |
1719 | } | |
1720 | ||
1721 | if (have_usable_route) { | |
1722 | /* | |
1723 | * Make monitor | |
1724 | * | |
1725 | * TBD factor this out into its own function | |
1726 | */ | |
1727 | struct prefix *pfx_mon = prefix_new(); | |
1728 | if (!RFAPI_MONITOR_EXTERIOR(rn)->source) { | |
1729 | RFAPI_MONITOR_EXTERIOR(rn)->source = | |
1730 | skiplist_new( | |
1731 | 0, NULL, | |
63265b5c | 1732 | prefix_free_lists); |
fe08ba7e | 1733 | agg_lock_node(rn); /* for skiplist */ |
d62a17ae | 1734 | } |
fe08ba7e | 1735 | agg_lock_node(rn); /* for skiplist entry */ |
d62a17ae | 1736 | prefix_copy(pfx_mon, prefix); |
1737 | if (!skiplist_insert( | |
1738 | RFAPI_MONITOR_EXTERIOR(rn)->source, | |
1739 | info, pfx_mon)) { | |
1740 | ||
18ee8310 | 1741 | bgp_path_info_lock(info); |
d62a17ae | 1742 | } |
1743 | } | |
fe08ba7e | 1744 | par = agg_node_parent(rn); |
d62a17ae | 1745 | if (par) |
fe08ba7e DS |
1746 | agg_lock_node(par); |
1747 | agg_unlock_node(rn); | |
d62a17ae | 1748 | rn = par; |
1749 | } | |
1750 | if (rn) | |
fe08ba7e | 1751 | agg_unlock_node(rn); |
d62a17ae | 1752 | |
1753 | if (!have_usable_route) { | |
1754 | struct prefix *pfx_mon = prefix_new(); | |
1755 | prefix_copy(pfx_mon, prefix); | |
1756 | if (!skiplist_insert(it->monitor_exterior_orphans, info, | |
1757 | pfx_mon)) { | |
1758 | ||
18ee8310 | 1759 | bgp_path_info_lock(info); |
d62a17ae | 1760 | } |
1761 | } | |
1762 | } | |
65efcfce LB |
1763 | } |
1764 | ||
d62a17ae | 1765 | void vnc_import_bgp_exterior_add_route( |
5a1ae2c2 DS |
1766 | struct bgp *bgp, /* exterior instance, we hope */ |
1767 | const struct prefix *prefix, /* unicast prefix */ | |
1768 | struct bgp_path_info *info) /* unicast info */ | |
65efcfce | 1769 | { |
d62a17ae | 1770 | vnc_import_bgp_exterior_add_route_it(bgp, prefix, info, NULL); |
65efcfce LB |
1771 | } |
1772 | ||
1773 | /* | |
1774 | * There should be only one of these per prefix at a time. | |
1775 | * This should probably be called as a result of selection operation. | |
1776 | * | |
1777 | * NB should be called espacially for bgp instances that are named, | |
1778 | * because the exterior routes will always come from one of those. | |
1779 | * We filter here on the instance name to make sure we get only the | |
1780 | * right routes. | |
1781 | */ | |
d62a17ae | 1782 | void vnc_import_bgp_exterior_del_route( |
5a1ae2c2 DS |
1783 | struct bgp *bgp, const struct prefix *prefix, /* unicast prefix */ |
1784 | struct bgp_path_info *info) /* unicast info */ | |
65efcfce | 1785 | { |
d62a17ae | 1786 | struct rfapi *h; |
1787 | struct rfapi_cfg *hc; | |
1788 | struct rfapi_import_table *it; | |
1789 | struct prefix pfx_orig_nexthop; | |
1790 | afi_t afi = family2afi(prefix->family); | |
1791 | struct bgp *bgp_default = bgp_get_default(); | |
1792 | ||
1793 | if (!bgp_default) | |
1794 | return; | |
1795 | ||
1796 | memset(&pfx_orig_nexthop, 0, | |
6006b807 | 1797 | sizeof(pfx_orig_nexthop)); /* keep valgrind happy */ |
d62a17ae | 1798 | |
1799 | h = bgp_default->rfapi; | |
1800 | hc = bgp_default->rfapi_cfg; | |
1801 | ||
1802 | if (!h || !hc) { | |
1803 | vnc_zlog_debug_verbose( | |
1804 | "%s: rfapi or rfapi_cfg not instantiated, skipping", | |
1805 | __func__); | |
1806 | return; | |
1807 | } | |
1808 | if (!hc->redist_bgp_exterior_view) { | |
1809 | vnc_zlog_debug_verbose("%s: exterior view not set, skipping", | |
1810 | __func__); | |
1811 | return; | |
1812 | } | |
1813 | if (bgp != hc->redist_bgp_exterior_view) { | |
1814 | vnc_zlog_debug_verbose( | |
1815 | "%s: bgp %p != hc->redist_bgp_exterior_view %p, skipping", | |
1816 | __func__, bgp, hc->redist_bgp_exterior_view); | |
1817 | return; | |
1818 | } | |
1819 | if (!hc->redist[afi][ZEBRA_ROUTE_BGP_DIRECT_EXT]) { | |
1820 | vnc_zlog_debug_verbose( | |
1821 | "%s: redist of exterior routes no enabled, skipping", | |
1822 | __func__); | |
1823 | return; | |
1824 | } | |
1825 | ||
d62a17ae | 1826 | /* |
1827 | * Extract nexthop from exterior route | |
1828 | * | |
1829 | * Incoming prefix is unicast. If v6, it is in multiprotocol area, | |
1830 | * but if v4 it is in attr->nexthop | |
1831 | */ | |
1832 | rfapiUnicastNexthop2Prefix(afi, info->attr, &pfx_orig_nexthop); | |
1833 | ||
1834 | for (it = h->imports; it; it = it->next) { | |
fe08ba7e DS |
1835 | struct agg_table *table; |
1836 | struct agg_node *rn; | |
1837 | struct agg_node *par; | |
40381db7 | 1838 | struct bgp_path_info *bpi_interior; |
d62a17ae | 1839 | int have_usable_route; |
1840 | ||
1841 | table = it->imported_vpn[afi]; | |
1842 | ||
fe08ba7e | 1843 | for (rn = agg_node_match(table, &pfx_orig_nexthop), |
d62a17ae | 1844 | have_usable_route = 0; |
1845 | (!have_usable_route) && rn;) { | |
1846 | ||
40381db7 DS |
1847 | for (bpi_interior = rn->info; bpi_interior; |
1848 | bpi_interior = bpi_interior->next) { | |
d62a17ae | 1849 | struct prefix_rd *prd; |
d7c0a89a | 1850 | uint32_t label = 0; |
d62a17ae | 1851 | |
40381db7 | 1852 | if (!is_usable_interior_route(bpi_interior)) |
d62a17ae | 1853 | continue; |
1854 | ||
1855 | /* | |
1856 | * have a legitimate route to exterior's nexthop | |
1857 | * via NVE. | |
1858 | * | |
1859 | * Import unicast route to the import table | |
1860 | */ | |
1861 | have_usable_route = 1; | |
1862 | ||
40381db7 DS |
1863 | if (bpi_interior->extra) { |
1864 | prd = &bpi_interior->extra->vnc.import | |
d62a17ae | 1865 | .rd; |
1866 | label = decode_label( | |
40381db7 | 1867 | &bpi_interior->extra->label[0]); |
d62a17ae | 1868 | } else |
1869 | prd = NULL; | |
1870 | ||
1871 | rfapiBgpInfoFilteredImportVPN( | |
40381db7 | 1872 | it, FIF_ACTION_KILL, bpi_interior->peer, |
d62a17ae | 1873 | NULL, /* rfd */ |
1874 | prefix, NULL, afi, prd, | |
40381db7 | 1875 | bpi_interior->attr, |
d62a17ae | 1876 | ZEBRA_ROUTE_BGP_DIRECT_EXT, |
1877 | BGP_ROUTE_REDISTRIBUTE, &label); | |
1878 | ||
1879 | /* | |
1880 | * Delete monitor | |
1881 | * | |
1882 | * TBD factor this out into its own function | |
1883 | */ | |
1884 | { | |
1885 | if (RFAPI_MONITOR_EXTERIOR(rn) | |
1886 | ->source) { | |
1887 | if (!skiplist_delete( | |
1888 | RFAPI_MONITOR_EXTERIOR( | |
1889 | rn) | |
1890 | ->source, | |
1891 | info, NULL)) { | |
1892 | ||
18ee8310 DS |
1893 | bgp_path_info_unlock( |
1894 | info); | |
fe08ba7e | 1895 | agg_unlock_node( |
d62a17ae | 1896 | rn); /* sl entry |
fe08ba7e | 1897 | */ |
d62a17ae | 1898 | } |
1899 | if (skiplist_empty( | |
1900 | RFAPI_MONITOR_EXTERIOR( | |
1901 | rn) | |
1902 | ->source)) { | |
1903 | skiplist_free( | |
1904 | RFAPI_MONITOR_EXTERIOR( | |
1905 | rn) | |
1906 | ->source); | |
1907 | RFAPI_MONITOR_EXTERIOR( | |
1908 | rn) | |
1909 | ->source = NULL; | |
fe08ba7e | 1910 | agg_unlock_node( |
d62a17ae | 1911 | rn); /* skiplist |
1912 | itself | |
1913 | */ | |
1914 | } | |
1915 | } | |
1916 | } | |
1917 | } | |
fe08ba7e | 1918 | par = agg_node_parent(rn); |
d62a17ae | 1919 | if (par) |
fe08ba7e DS |
1920 | agg_lock_node(par); |
1921 | agg_unlock_node(rn); | |
d62a17ae | 1922 | rn = par; |
1923 | } | |
1924 | if (rn) | |
fe08ba7e | 1925 | agg_unlock_node(rn); |
d62a17ae | 1926 | |
1927 | if (!have_usable_route) { | |
1928 | if (!skiplist_delete(it->monitor_exterior_orphans, info, | |
1929 | NULL)) { | |
1930 | ||
18ee8310 | 1931 | bgp_path_info_unlock(info); |
d62a17ae | 1932 | } |
1933 | } | |
1934 | } | |
65efcfce LB |
1935 | } |
1936 | ||
1937 | /* | |
1938 | * This function should be called after a new interior VPN route | |
1939 | * has been added to an import_table. | |
1940 | * | |
1941 | * NB should also be called whenever an existing vpn interior route | |
1942 | * becomes valid (e.g., valid_interior_count is inremented) | |
1943 | */ | |
d62a17ae | 1944 | void vnc_import_bgp_exterior_add_route_interior( |
1945 | struct bgp *bgp, struct rfapi_import_table *it, | |
40381db7 DS |
1946 | struct agg_node *rn_interior, /* VPN IT node */ |
1947 | struct bgp_path_info *bpi_interior) /* VPN IT route */ | |
65efcfce | 1948 | { |
26a3ffd6 DS |
1949 | const struct prefix *p = agg_node_get_prefix(rn_interior); |
1950 | afi_t afi = family2afi(p->family); | |
fe08ba7e | 1951 | struct agg_node *par; |
40381db7 | 1952 | struct bgp_path_info *bpi_exterior; |
d62a17ae | 1953 | struct prefix *pfx_exterior; /* exterior pfx */ |
1954 | void *cursor; | |
1955 | int rc; | |
1956 | struct list *list_adopted; | |
1957 | ||
1958 | vnc_zlog_debug_verbose("%s: entry", __func__); | |
1959 | ||
40381db7 | 1960 | if (!is_usable_interior_route(bpi_interior)) { |
d62a17ae | 1961 | vnc_zlog_debug_verbose( |
1962 | "%s: not usable interior route, skipping", __func__); | |
1963 | return; | |
1964 | } | |
1965 | ||
1966 | if (!bgp->rfapi_cfg->redist[afi][ZEBRA_ROUTE_BGP_DIRECT_EXT]) { | |
1967 | vnc_zlog_debug_verbose( | |
1968 | "%s: redist of exterior routes no enabled, skipping", | |
1969 | __func__); | |
1970 | return; | |
1971 | } | |
1972 | ||
1973 | if (it == bgp->rfapi->it_ce) { | |
1974 | vnc_zlog_debug_verbose("%s: import table is it_ce, skipping", | |
1975 | __func__); | |
1976 | return; | |
1977 | } | |
1978 | ||
1979 | /*debugging */ | |
26a3ffd6 DS |
1980 | vnc_zlog_debug_verbose("%s: interior prefix=%pRN, bpi type=%d", |
1981 | __func__, rn_interior, bpi_interior->type); | |
d62a17ae | 1982 | |
1983 | if (RFAPI_HAS_MONITOR_EXTERIOR(rn_interior)) { | |
1984 | ||
1985 | int count = 0; /* debugging */ | |
1986 | ||
1987 | vnc_zlog_debug_verbose( | |
1988 | "%s: has exterior monitor; ext src: %p", __func__, | |
1989 | RFAPI_MONITOR_EXTERIOR(rn_interior)->source); | |
1990 | ||
1991 | /* | |
1992 | * There is a monitor here already. Therefore, we do not need | |
1993 | * to do any pulldown. Just construct exterior routes based | |
1994 | * on the new interior route. | |
1995 | */ | |
1996 | cursor = NULL; | |
1997 | for (rc = skiplist_next( | |
1998 | RFAPI_MONITOR_EXTERIOR(rn_interior)->source, | |
40381db7 | 1999 | (void **)&bpi_exterior, (void **)&pfx_exterior, |
d62a17ae | 2000 | &cursor); |
2001 | !rc; rc = skiplist_next( | |
2002 | RFAPI_MONITOR_EXTERIOR(rn_interior)->source, | |
40381db7 DS |
2003 | (void **)&bpi_exterior, |
2004 | (void **)&pfx_exterior, &cursor)) { | |
d62a17ae | 2005 | |
2006 | struct prefix_rd *prd; | |
2007 | struct attr new_attr; | |
d7c0a89a | 2008 | uint32_t label = 0; |
d62a17ae | 2009 | |
2010 | ||
2011 | ++count; /* debugging */ | |
2012 | ||
40381db7 | 2013 | assert(bpi_exterior); |
d62a17ae | 2014 | assert(pfx_exterior); |
2015 | ||
40381db7 DS |
2016 | if (bpi_interior->extra) { |
2017 | prd = &bpi_interior->extra->vnc.import.rd; | |
d62a17ae | 2018 | label = decode_label( |
40381db7 | 2019 | &bpi_interior->extra->label[0]); |
d62a17ae | 2020 | } else |
2021 | prd = NULL; | |
2022 | ||
2023 | /* use local_pref from unicast route */ | |
2024 | memset(&new_attr, 0, sizeof(struct attr)); | |
6f4f49b2 | 2025 | new_attr = *bpi_interior->attr; |
40381db7 DS |
2026 | if (bpi_exterior |
2027 | && (bpi_exterior->attr->flag | |
d62a17ae | 2028 | & ATTR_FLAG_BIT(BGP_ATTR_LOCAL_PREF))) { |
2029 | new_attr.local_pref = | |
40381db7 | 2030 | bpi_exterior->attr->local_pref; |
d62a17ae | 2031 | new_attr.flag |= |
2032 | ATTR_FLAG_BIT(BGP_ATTR_LOCAL_PREF); | |
2033 | } | |
2034 | ||
2035 | rfapiBgpInfoFilteredImportVPN( | |
40381db7 | 2036 | it, FIF_ACTION_UPDATE, bpi_interior->peer, |
d62a17ae | 2037 | NULL, /* rfd */ |
2038 | pfx_exterior, NULL, afi, prd, &new_attr, | |
2039 | ZEBRA_ROUTE_BGP_DIRECT_EXT, | |
2040 | BGP_ROUTE_REDISTRIBUTE, &label); | |
2041 | } | |
2042 | vnc_zlog_debug_verbose( | |
2043 | "%s: finished constructing exteriors based on existing monitors", | |
2044 | __func__); | |
2045 | return; | |
2046 | } | |
2047 | ||
2048 | vnc_zlog_debug_verbose("%s: no exterior monitor", __func__); | |
2049 | ||
2050 | /* | |
2051 | * No monitor at this node. Is this the first valid interior | |
2052 | * route at this node? | |
2053 | */ | |
2054 | if (RFAPI_MONITOR_EXTERIOR(rn_interior)->valid_interior_count > 1) { | |
2055 | vnc_zlog_debug_verbose( | |
2056 | "%s: new interior route not first valid one, skipping pulldown", | |
2057 | __func__); | |
2058 | return; | |
2059 | } | |
2060 | ||
2061 | /* | |
2062 | * Look up the tree for possible pulldown candidates. | |
2063 | * Find nearest parent with an exterior route monitor | |
2064 | */ | |
fe08ba7e DS |
2065 | for (par = agg_node_parent(rn_interior); par; |
2066 | par = agg_node_parent(par)) { | |
d62a17ae | 2067 | if (RFAPI_HAS_MONITOR_EXTERIOR(par)) |
2068 | break; | |
2069 | } | |
2070 | ||
2071 | if (par) { | |
2072 | ||
2073 | vnc_zlog_debug_verbose( | |
2074 | "%s: checking parent %p for possible pulldowns", | |
2075 | __func__, par); | |
2076 | ||
2077 | /* check monitors at par for possible pulldown */ | |
2078 | cursor = NULL; | |
2079 | for (rc = skiplist_next(RFAPI_MONITOR_EXTERIOR(par)->source, | |
40381db7 | 2080 | (void **)&bpi_exterior, |
d62a17ae | 2081 | (void **)&pfx_exterior, &cursor); |
2082 | !rc; | |
2083 | rc = skiplist_next(RFAPI_MONITOR_EXTERIOR(par)->source, | |
40381db7 | 2084 | (void **)&bpi_exterior, |
d62a17ae | 2085 | (void **)&pfx_exterior, &cursor)) { |
2086 | ||
2087 | struct prefix pfx_nexthop; | |
2088 | ||
2089 | memset(&pfx_nexthop, 0, | |
2090 | sizeof(struct prefix)); /* keep valgrind happy */ | |
2091 | ||
2092 | /* check original nexthop for prefix match */ | |
40381db7 | 2093 | rfapiUnicastNexthop2Prefix(afi, bpi_exterior->attr, |
d62a17ae | 2094 | &pfx_nexthop); |
2095 | ||
26a3ffd6 | 2096 | if (prefix_match(p, &pfx_nexthop)) { |
d62a17ae | 2097 | |
40381db7 | 2098 | struct bgp_path_info *bpi; |
d62a17ae | 2099 | struct prefix_rd *prd; |
2100 | struct attr new_attr; | |
d7c0a89a | 2101 | uint32_t label = 0; |
d62a17ae | 2102 | |
2103 | /* do pull-down */ | |
2104 | ||
2105 | /* | |
2106 | * add monitor to longer prefix | |
2107 | */ | |
2108 | struct prefix *pfx_mon = prefix_new(); | |
2109 | prefix_copy(pfx_mon, pfx_exterior); | |
2110 | if (!RFAPI_MONITOR_EXTERIOR(rn_interior) | |
2111 | ->source) { | |
2112 | RFAPI_MONITOR_EXTERIOR(rn_interior) | |
2113 | ->source = skiplist_new( | |
63265b5c | 2114 | 0, NULL, prefix_free_lists); |
fe08ba7e | 2115 | agg_lock_node(rn_interior); |
d62a17ae | 2116 | } |
2117 | skiplist_insert( | |
2118 | RFAPI_MONITOR_EXTERIOR(rn_interior) | |
2119 | ->source, | |
40381db7 | 2120 | bpi_exterior, pfx_mon); |
fe08ba7e | 2121 | agg_lock_node(rn_interior); |
d62a17ae | 2122 | |
2123 | /* | |
2124 | * Delete constructed exterior routes based on | |
2125 | * parent routes. | |
2126 | */ | |
40381db7 | 2127 | for (bpi = par->info; bpi; bpi = bpi->next) { |
d62a17ae | 2128 | |
40381db7 DS |
2129 | if (bpi->extra) { |
2130 | prd = &bpi->extra->vnc.import | |
2131 | .rd; | |
d62a17ae | 2132 | label = decode_label( |
40381db7 | 2133 | &bpi->extra->label[0]); |
d62a17ae | 2134 | } else |
2135 | prd = NULL; | |
2136 | ||
2137 | rfapiBgpInfoFilteredImportVPN( | |
40381db7 | 2138 | it, FIF_ACTION_KILL, bpi->peer, |
d62a17ae | 2139 | NULL, /* rfd */ |
2140 | pfx_exterior, NULL, afi, prd, | |
40381db7 | 2141 | bpi->attr, |
d62a17ae | 2142 | ZEBRA_ROUTE_BGP_DIRECT_EXT, |
2143 | BGP_ROUTE_REDISTRIBUTE, &label); | |
2144 | } | |
2145 | ||
2146 | ||
2147 | /* | |
2148 | * Add constructed exterior routes based on | |
2149 | * the new interior route at longer prefix. | |
2150 | */ | |
40381db7 DS |
2151 | if (bpi_interior->extra) { |
2152 | prd = &bpi_interior->extra->vnc.import | |
d62a17ae | 2153 | .rd; |
2154 | label = decode_label( | |
40381db7 | 2155 | &bpi_interior->extra->label[0]); |
d62a17ae | 2156 | } else |
2157 | prd = NULL; | |
2158 | ||
2159 | /* use local_pref from unicast route */ | |
2160 | memset(&new_attr, 0, sizeof(struct attr)); | |
6f4f49b2 | 2161 | new_attr = *bpi_interior->attr; |
40381db7 DS |
2162 | if (bpi_exterior |
2163 | && (bpi_exterior->attr->flag | |
d62a17ae | 2164 | & ATTR_FLAG_BIT(BGP_ATTR_LOCAL_PREF))) { |
2165 | new_attr.local_pref = | |
40381db7 | 2166 | bpi_exterior->attr->local_pref; |
d62a17ae | 2167 | new_attr.flag |= ATTR_FLAG_BIT( |
2168 | BGP_ATTR_LOCAL_PREF); | |
2169 | } | |
2170 | ||
2171 | rfapiBgpInfoFilteredImportVPN( | |
2172 | it, FIF_ACTION_UPDATE, | |
40381db7 | 2173 | bpi_interior->peer, NULL, /* rfd */ |
d62a17ae | 2174 | pfx_exterior, NULL, afi, prd, &new_attr, |
2175 | ZEBRA_ROUTE_BGP_DIRECT_EXT, | |
2176 | BGP_ROUTE_REDISTRIBUTE, &label); | |
2177 | } | |
2178 | } | |
2179 | ||
2180 | /* | |
2181 | * The only monitors at rn_interior are the ones we added just | |
2182 | * above, so we can use the rn_interior list to identify which | |
2183 | * monitors to delete from the parent. | |
2184 | */ | |
2185 | cursor = NULL; | |
2186 | for (rc = skiplist_next( | |
2187 | RFAPI_MONITOR_EXTERIOR(rn_interior)->source, | |
40381db7 | 2188 | (void **)&bpi_exterior, NULL, &cursor); |
d62a17ae | 2189 | !rc; rc = skiplist_next( |
2190 | RFAPI_MONITOR_EXTERIOR(rn_interior)->source, | |
40381db7 | 2191 | (void **)&bpi_exterior, NULL, &cursor)) { |
d62a17ae | 2192 | |
2193 | ||
2194 | skiplist_delete(RFAPI_MONITOR_EXTERIOR(par)->source, | |
40381db7 | 2195 | bpi_exterior, NULL); |
fe08ba7e | 2196 | agg_unlock_node(par); /* sl entry */ |
d62a17ae | 2197 | } |
2198 | if (skiplist_empty(RFAPI_MONITOR_EXTERIOR(par)->source)) { | |
2199 | skiplist_free(RFAPI_MONITOR_EXTERIOR(par)->source); | |
2200 | RFAPI_MONITOR_EXTERIOR(par)->source = NULL; | |
fe08ba7e | 2201 | agg_unlock_node(par); /* sl itself */ |
d62a17ae | 2202 | } |
2203 | } | |
2204 | ||
2205 | vnc_zlog_debug_verbose("%s: checking orphans", __func__); | |
2206 | ||
2207 | /* | |
2208 | * See if any orphans can be pulled down to the current node | |
2209 | */ | |
2210 | cursor = NULL; | |
2211 | list_adopted = NULL; | |
2212 | for (rc = skiplist_next(it->monitor_exterior_orphans, | |
40381db7 | 2213 | (void **)&bpi_exterior, (void **)&pfx_exterior, |
d62a17ae | 2214 | &cursor); |
2215 | !rc; rc = skiplist_next(it->monitor_exterior_orphans, | |
40381db7 | 2216 | (void **)&bpi_exterior, |
d62a17ae | 2217 | (void **)&pfx_exterior, &cursor)) { |
2218 | ||
2219 | struct prefix pfx_nexthop; | |
d62a17ae | 2220 | afi_t afi_exterior = family2afi(pfx_exterior->family); |
2221 | ||
d62a17ae | 2222 | vnc_zlog_debug_verbose( |
2dbe669b DA |
2223 | "%s: checking exterior orphan at prefix %pFX", __func__, |
2224 | pfx_exterior); | |
d62a17ae | 2225 | |
2226 | if (afi_exterior != afi) { | |
2227 | vnc_zlog_debug_verbose( | |
2228 | "%s: exterior orphan afi %d != interior afi %d, skip", | |
2229 | __func__, afi_exterior, afi); | |
2230 | continue; | |
2231 | } | |
2232 | ||
2233 | /* check original nexthop for prefix match */ | |
40381db7 | 2234 | rfapiUnicastNexthop2Prefix(afi, bpi_exterior->attr, |
d62a17ae | 2235 | &pfx_nexthop); |
2236 | ||
26a3ffd6 | 2237 | if (prefix_match(p, &pfx_nexthop)) { |
d62a17ae | 2238 | |
2239 | struct prefix_rd *prd; | |
2240 | struct attr new_attr; | |
d7c0a89a | 2241 | uint32_t label = 0; |
d62a17ae | 2242 | |
2243 | /* do pull-down */ | |
2244 | ||
2245 | /* | |
2246 | * add monitor to longer prefix | |
2247 | */ | |
2248 | ||
2249 | struct prefix *pfx_mon = prefix_new(); | |
2250 | prefix_copy(pfx_mon, pfx_exterior); | |
2251 | if (!RFAPI_MONITOR_EXTERIOR(rn_interior)->source) { | |
2252 | RFAPI_MONITOR_EXTERIOR(rn_interior)->source = | |
2253 | skiplist_new( | |
63265b5c | 2254 | 0, NULL, prefix_free_lists); |
fe08ba7e | 2255 | agg_lock_node(rn_interior); /* sl */ |
d62a17ae | 2256 | } |
2257 | skiplist_insert( | |
2258 | RFAPI_MONITOR_EXTERIOR(rn_interior)->source, | |
40381db7 | 2259 | bpi_exterior, pfx_mon); |
fe08ba7e | 2260 | agg_lock_node(rn_interior); /* sl entry */ |
d62a17ae | 2261 | if (!list_adopted) { |
2262 | list_adopted = list_new(); | |
2263 | } | |
40381db7 | 2264 | listnode_add(list_adopted, bpi_exterior); |
d62a17ae | 2265 | |
2266 | /* | |
2267 | * Add constructed exterior routes based on the | |
2268 | * new interior route at the longer prefix. | |
2269 | */ | |
40381db7 DS |
2270 | if (bpi_interior->extra) { |
2271 | prd = &bpi_interior->extra->vnc.import.rd; | |
d62a17ae | 2272 | label = decode_label( |
40381db7 | 2273 | &bpi_interior->extra->label[0]); |
d62a17ae | 2274 | } else |
2275 | prd = NULL; | |
2276 | ||
2277 | /* use local_pref from unicast route */ | |
2278 | memset(&new_attr, 0, sizeof(struct attr)); | |
6f4f49b2 | 2279 | new_attr = *bpi_interior->attr; |
40381db7 DS |
2280 | if (bpi_exterior |
2281 | && (bpi_exterior->attr->flag | |
d62a17ae | 2282 | & ATTR_FLAG_BIT(BGP_ATTR_LOCAL_PREF))) { |
2283 | new_attr.local_pref = | |
40381db7 | 2284 | bpi_exterior->attr->local_pref; |
d62a17ae | 2285 | new_attr.flag |= |
2286 | ATTR_FLAG_BIT(BGP_ATTR_LOCAL_PREF); | |
2287 | } | |
2288 | ||
2289 | rfapiBgpInfoFilteredImportVPN( | |
40381db7 | 2290 | it, FIF_ACTION_UPDATE, bpi_interior->peer, |
d62a17ae | 2291 | NULL, /* rfd */ |
2292 | pfx_exterior, NULL, afi, prd, &new_attr, | |
2293 | ZEBRA_ROUTE_BGP_DIRECT_EXT, | |
2294 | BGP_ROUTE_REDISTRIBUTE, &label); | |
2295 | } | |
2296 | } | |
2297 | if (list_adopted) { | |
2298 | struct listnode *node; | |
40381db7 | 2299 | struct agg_node *an_bpi_exterior; |
d62a17ae | 2300 | |
40381db7 DS |
2301 | for (ALL_LIST_ELEMENTS_RO(list_adopted, node, |
2302 | an_bpi_exterior)) { | |
d62a17ae | 2303 | skiplist_delete(it->monitor_exterior_orphans, |
40381db7 | 2304 | an_bpi_exterior, NULL); |
d62a17ae | 2305 | } |
6a154c88 | 2306 | list_delete(&list_adopted); |
d62a17ae | 2307 | } |
65efcfce LB |
2308 | } |
2309 | ||
2310 | /* | |
2311 | * This function should be called after an interior VPN route | |
2312 | * has been deleted from an import_table. | |
40381db7 | 2313 | * bpi_interior must still be valid, but it must already be detached |
65efcfce LB |
2314 | * from its route node and the route node's valid_interior_count |
2315 | * must already be decremented. | |
2316 | * | |
2317 | * NB should also be called whenever an existing vpn interior route | |
2318 | * becomes invalid (e.g., valid_interior_count is decremented) | |
2319 | */ | |
d62a17ae | 2320 | void vnc_import_bgp_exterior_del_route_interior( |
2321 | struct bgp *bgp, struct rfapi_import_table *it, | |
40381db7 DS |
2322 | struct agg_node *rn_interior, /* VPN IT node */ |
2323 | struct bgp_path_info *bpi_interior) /* VPN IT route */ | |
65efcfce | 2324 | { |
26a3ffd6 DS |
2325 | const struct prefix *p = agg_node_get_prefix(rn_interior); |
2326 | afi_t afi = family2afi(p->family); | |
fe08ba7e | 2327 | struct agg_node *par; |
40381db7 | 2328 | struct bgp_path_info *bpi_exterior; |
d62a17ae | 2329 | struct prefix *pfx_exterior; /* exterior pfx */ |
2330 | void *cursor; | |
2331 | int rc; | |
2332 | ||
40381db7 | 2333 | if (!VALID_INTERIOR_TYPE(bpi_interior->type)) { |
d62a17ae | 2334 | vnc_zlog_debug_verbose( |
2335 | "%s: type %d not valid interior type, skipping", | |
40381db7 | 2336 | __func__, bpi_interior->type); |
d62a17ae | 2337 | return; |
2338 | } | |
2339 | ||
2340 | if (!bgp->rfapi_cfg->redist[afi][ZEBRA_ROUTE_BGP_DIRECT_EXT]) { | |
2341 | vnc_zlog_debug_verbose( | |
2342 | "%s: redist of exterior routes no enabled, skipping", | |
2343 | __func__); | |
2344 | return; | |
2345 | } | |
2346 | ||
2347 | if (it == bgp->rfapi->it_ce) { | |
2348 | vnc_zlog_debug_verbose("%s: it is it_ce, skipping", __func__); | |
2349 | return; | |
2350 | } | |
2351 | ||
2352 | /* If no exterior routes depend on this prefix, nothing to do */ | |
2353 | if (!RFAPI_HAS_MONITOR_EXTERIOR(rn_interior)) { | |
2354 | vnc_zlog_debug_verbose("%s: no exterior monitor, skipping", | |
2355 | __func__); | |
2356 | return; | |
2357 | } | |
2358 | ||
2359 | /*debugging */ | |
26a3ffd6 DS |
2360 | vnc_zlog_debug_verbose("%s: interior prefix=%pRN, bpi type=%d", |
2361 | __func__, rn_interior, bpi_interior->type); | |
d62a17ae | 2362 | |
2363 | /* | |
2364 | * Remove constructed routes based on the deleted interior route | |
2365 | */ | |
2366 | cursor = NULL; | |
2367 | for (rc = skiplist_next(RFAPI_MONITOR_EXTERIOR(rn_interior)->source, | |
40381db7 | 2368 | (void **)&bpi_exterior, (void **)&pfx_exterior, |
d62a17ae | 2369 | &cursor); |
2370 | !rc; | |
2371 | rc = skiplist_next(RFAPI_MONITOR_EXTERIOR(rn_interior)->source, | |
40381db7 | 2372 | (void **)&bpi_exterior, (void **)&pfx_exterior, |
d62a17ae | 2373 | &cursor)) { |
2374 | ||
2375 | struct prefix_rd *prd; | |
d7c0a89a | 2376 | uint32_t label = 0; |
d62a17ae | 2377 | |
40381db7 DS |
2378 | if (bpi_interior->extra) { |
2379 | prd = &bpi_interior->extra->vnc.import.rd; | |
2380 | label = decode_label(&bpi_interior->extra->label[0]); | |
d62a17ae | 2381 | } else |
2382 | prd = NULL; | |
2383 | ||
2384 | rfapiBgpInfoFilteredImportVPN( | |
40381db7 DS |
2385 | it, FIF_ACTION_KILL, bpi_interior->peer, NULL, /* rfd */ |
2386 | pfx_exterior, NULL, afi, prd, bpi_interior->attr, | |
d62a17ae | 2387 | ZEBRA_ROUTE_BGP_DIRECT_EXT, BGP_ROUTE_REDISTRIBUTE, |
2388 | &label); | |
2389 | } | |
2390 | ||
2391 | /* | |
2392 | * If there are no remaining valid interior routes at this prefix, | |
2393 | * we need to look up the tree for a possible node to move monitors to | |
2394 | */ | |
2395 | if (RFAPI_MONITOR_EXTERIOR(rn_interior)->valid_interior_count) { | |
2396 | vnc_zlog_debug_verbose( | |
2397 | "%s: interior routes still present, skipping", | |
2398 | __func__); | |
2399 | return; | |
2400 | } | |
65efcfce | 2401 | |
d62a17ae | 2402 | /* |
2403 | * Find nearest parent with at least one valid interior route | |
2404 | * If none is found, par will end up NULL, and we will move | |
2405 | * the monitors to the orphan list for this import table | |
2406 | */ | |
fe08ba7e DS |
2407 | for (par = agg_node_parent(rn_interior); par; |
2408 | par = agg_node_parent(par)) { | |
d62a17ae | 2409 | if (RFAPI_MONITOR_EXTERIOR(par)->valid_interior_count) |
2410 | break; | |
2411 | } | |
2412 | ||
2413 | vnc_zlog_debug_verbose("%s: par=%p, ext src: %p", __func__, par, | |
2414 | RFAPI_MONITOR_EXTERIOR(rn_interior)->source); | |
2415 | ||
2416 | /* move all monitors */ | |
2417 | /* | |
2418 | * We will use and delete every element of the source skiplist | |
2419 | */ | |
2420 | while (!skiplist_first(RFAPI_MONITOR_EXTERIOR(rn_interior)->source, | |
40381db7 DS |
2421 | (void **)&bpi_exterior, |
2422 | (void **)&pfx_exterior)) { | |
d62a17ae | 2423 | |
2424 | struct prefix *pfx_mon = prefix_new(); | |
2425 | ||
2426 | prefix_copy(pfx_mon, pfx_exterior); | |
2427 | ||
2428 | if (par) { | |
2429 | ||
40381db7 | 2430 | struct bgp_path_info *bpi; |
d62a17ae | 2431 | |
2432 | /* | |
2433 | * Add monitor to parent node | |
2434 | */ | |
2435 | if (!RFAPI_MONITOR_EXTERIOR(par)->source) { | |
2436 | RFAPI_MONITOR_EXTERIOR(par)->source = | |
2437 | skiplist_new( | |
63265b5c | 2438 | 0, NULL, prefix_free_lists); |
fe08ba7e | 2439 | agg_lock_node(par); /* sl */ |
d62a17ae | 2440 | } |
2441 | skiplist_insert(RFAPI_MONITOR_EXTERIOR(par)->source, | |
40381db7 | 2442 | bpi_exterior, pfx_mon); |
fe08ba7e | 2443 | agg_lock_node(par); /* sl entry */ |
d62a17ae | 2444 | |
2445 | /* Add constructed exterior routes based on parent */ | |
40381db7 | 2446 | for (bpi = par->info; bpi; bpi = bpi->next) { |
d62a17ae | 2447 | |
2448 | struct prefix_rd *prd; | |
2449 | struct attr new_attr; | |
d7c0a89a | 2450 | uint32_t label = 0; |
d62a17ae | 2451 | |
40381db7 | 2452 | if (bpi->type == ZEBRA_ROUTE_BGP_DIRECT_EXT) |
d62a17ae | 2453 | continue; |
2454 | ||
40381db7 DS |
2455 | if (bpi->extra) { |
2456 | prd = &bpi->extra->vnc.import.rd; | |
317f1fe0 | 2457 | label = decode_label( |
40381db7 | 2458 | &bpi->extra->label[0]); |
d62a17ae | 2459 | } else |
2460 | prd = NULL; | |
2461 | ||
2462 | /* use local_pref from unicast route */ | |
6006b807 | 2463 | memset(&new_attr, 0, sizeof(new_attr)); |
6f4f49b2 | 2464 | new_attr = *bpi->attr; |
40381db7 DS |
2465 | if (bpi_exterior |
2466 | && (bpi_exterior->attr->flag | |
d62a17ae | 2467 | & ATTR_FLAG_BIT(BGP_ATTR_LOCAL_PREF))) { |
2468 | new_attr.local_pref = | |
40381db7 | 2469 | bpi_exterior->attr->local_pref; |
d62a17ae | 2470 | new_attr.flag |= ATTR_FLAG_BIT( |
2471 | BGP_ATTR_LOCAL_PREF); | |
2472 | } | |
2473 | ||
2474 | rfapiBgpInfoFilteredImportVPN( | |
40381db7 | 2475 | it, FIF_ACTION_UPDATE, bpi->peer, |
d62a17ae | 2476 | NULL, /* rfd */ |
2477 | pfx_exterior, NULL, afi, prd, &new_attr, | |
2478 | ZEBRA_ROUTE_BGP_DIRECT_EXT, | |
2479 | BGP_ROUTE_REDISTRIBUTE, &label); | |
2480 | } | |
2481 | ||
2482 | } else { | |
2483 | ||
2484 | /* | |
2485 | * No interior route for exterior's nexthop. Save | |
2486 | * monitor | |
2487 | * in orphan list to await future route. | |
2488 | */ | |
2489 | skiplist_insert(it->monitor_exterior_orphans, | |
40381db7 | 2490 | bpi_exterior, pfx_mon); |
d62a17ae | 2491 | } |
2492 | ||
2493 | skiplist_delete_first( | |
2494 | RFAPI_MONITOR_EXTERIOR(rn_interior)->source); | |
fe08ba7e | 2495 | agg_unlock_node(rn_interior); /* sl entry */ |
d62a17ae | 2496 | } |
2497 | if (skiplist_empty(RFAPI_MONITOR_EXTERIOR(rn_interior)->source)) { | |
2498 | skiplist_free(RFAPI_MONITOR_EXTERIOR(rn_interior)->source); | |
2499 | RFAPI_MONITOR_EXTERIOR(rn_interior)->source = NULL; | |
fe08ba7e | 2500 | agg_unlock_node(rn_interior); /* sl itself */ |
d62a17ae | 2501 | } |
65efcfce LB |
2502 | } |
2503 | ||
2504 | /*********************************************************************** | |
2505 | * Generic add/delete unicast routes | |
2506 | ***********************************************************************/ | |
2507 | ||
5a1ae2c2 | 2508 | void vnc_import_bgp_add_route(struct bgp *bgp, const struct prefix *prefix, |
4b7e6066 | 2509 | struct bgp_path_info *info) |
65efcfce | 2510 | { |
d62a17ae | 2511 | afi_t afi = family2afi(prefix->family); |
65efcfce | 2512 | |
7f88f54a | 2513 | if (VNC_DEBUG(VERBOSE)) { |
d62a17ae | 2514 | struct prefix pfx_nexthop; |
65efcfce | 2515 | |
d62a17ae | 2516 | rfapiUnicastNexthop2Prefix(afi, info->attr, &pfx_nexthop); |
2dbe669b DA |
2517 | vnc_zlog_debug_verbose("%s: pfx %pFX, nh %pFX", __func__, |
2518 | prefix, &pfx_nexthop); | |
d62a17ae | 2519 | } |
65efcfce | 2520 | #if DEBUG_RHN_LIST |
d62a17ae | 2521 | print_rhn_list(__func__, "ENTER "); |
65efcfce | 2522 | #endif |
d62a17ae | 2523 | VNC_RHNCK(enter); |
2524 | ||
2525 | if (!afi) { | |
450971aa | 2526 | flog_err(EC_LIB_DEVELOPMENT, "%s: can't get afi of prefix", |
1c50c1c0 | 2527 | __func__); |
d62a17ae | 2528 | return; |
2529 | } | |
2530 | ||
2531 | if (!bgp->rfapi_cfg) { | |
2532 | vnc_zlog_debug_verbose("%s: bgp->rfapi_cfg is NULL, skipping", | |
2533 | __func__); | |
2534 | return; | |
2535 | } | |
2536 | ||
2537 | /* check vnc redist flag for bgp direct routes */ | |
2538 | if (!bgp->rfapi_cfg->redist[afi][ZEBRA_ROUTE_BGP_DIRECT]) { | |
2539 | vnc_zlog_debug_verbose( | |
2540 | "%s: bgp->rfapi_cfg->redist[afi=%d][type=%d=ZEBRA_ROUTE_BGP_DIRECT] is 0, skipping", | |
2541 | __func__, afi, ZEBRA_ROUTE_BGP_DIRECT); | |
2542 | return; | |
2543 | } | |
2544 | ||
2545 | switch (bgp->rfapi_cfg->redist_mode) { | |
2546 | case VNC_REDIST_MODE_PLAIN: | |
2547 | vnc_import_bgp_add_route_mode_plain(bgp, prefix, info); | |
2548 | break; | |
2549 | ||
2550 | case VNC_REDIST_MODE_RFG: | |
2551 | if (bgp->rfapi_cfg->rfg_redist) | |
2552 | vnc_import_bgp_add_route_mode_nvegroup( | |
2553 | bgp, prefix, info, bgp->rfapi_cfg->rfg_redist); | |
2554 | else | |
2555 | vnc_zlog_debug_verbose("%s: mode RFG but no redist RFG", | |
2556 | __func__); | |
2557 | break; | |
2558 | ||
2559 | case VNC_REDIST_MODE_RESOLVE_NVE: | |
2560 | vnc_import_bgp_add_route_mode_resolve_nve(bgp, prefix, info); | |
2561 | break; | |
2562 | } | |
65efcfce | 2563 | #if DEBUG_RHN_LIST |
d62a17ae | 2564 | print_rhn_list(__func__, "LEAVE "); |
65efcfce | 2565 | #endif |
d62a17ae | 2566 | VNC_RHNCK(leave); |
65efcfce LB |
2567 | } |
2568 | ||
2569 | /* | |
2570 | * "Withdrawing a Route" import process | |
2571 | */ | |
5a1ae2c2 | 2572 | void vnc_import_bgp_del_route(struct bgp *bgp, const struct prefix *prefix, |
4b7e6066 | 2573 | struct bgp_path_info *info) /* unicast info */ |
65efcfce | 2574 | { |
d62a17ae | 2575 | afi_t afi = family2afi(prefix->family); |
65efcfce | 2576 | |
d62a17ae | 2577 | assert(afi); |
65efcfce | 2578 | |
d62a17ae | 2579 | { |
2580 | struct prefix pfx_nexthop; | |
65efcfce | 2581 | |
d62a17ae | 2582 | rfapiUnicastNexthop2Prefix(afi, info->attr, &pfx_nexthop); |
2dbe669b DA |
2583 | vnc_zlog_debug_verbose("%s: pfx %pFX, nh %pFX", __func__, |
2584 | prefix, &pfx_nexthop); | |
d62a17ae | 2585 | } |
65efcfce | 2586 | #if DEBUG_RHN_LIST |
d62a17ae | 2587 | print_rhn_list(__func__, "ENTER "); |
65efcfce | 2588 | #endif |
d62a17ae | 2589 | VNC_RHNCK(enter); |
2590 | ||
2591 | if (!bgp->rfapi_cfg) { | |
2592 | vnc_zlog_debug_verbose("%s: bgp->rfapi_cfg is NULL, skipping", | |
2593 | __func__); | |
2594 | return; | |
2595 | } | |
2596 | ||
2597 | /* check bgp redist flag for vnc direct ("vpn") routes */ | |
2598 | if (!bgp->rfapi_cfg->redist[afi][ZEBRA_ROUTE_BGP_DIRECT]) { | |
2599 | vnc_zlog_debug_verbose( | |
2600 | "%s: bgp redistribution of afi=%d VNC direct routes is off", | |
2601 | __func__, afi); | |
2602 | return; | |
2603 | } | |
2604 | ||
2605 | switch (bgp->rfapi_cfg->redist_mode) { | |
2606 | case VNC_REDIST_MODE_PLAIN: | |
2607 | vnc_import_bgp_del_route_mode_plain(bgp, prefix, info); | |
2608 | break; | |
2609 | ||
2610 | case VNC_REDIST_MODE_RFG: | |
2611 | if (bgp->rfapi_cfg->rfg_redist) | |
2612 | vnc_import_bgp_del_route_mode_nvegroup(bgp, prefix, | |
2613 | info); | |
2614 | else | |
2615 | vnc_zlog_debug_verbose("%s: mode RFG but no redist RFG", | |
2616 | __func__); | |
2617 | break; | |
2618 | ||
2619 | case VNC_REDIST_MODE_RESOLVE_NVE: | |
2620 | vnc_import_bgp_del_route_mode_resolve_nve(bgp, afi, prefix, | |
2621 | info); | |
2622 | break; | |
2623 | } | |
65efcfce | 2624 | #if DEBUG_RHN_LIST |
d62a17ae | 2625 | print_rhn_list(__func__, "LEAVE "); |
65efcfce | 2626 | #endif |
d62a17ae | 2627 | VNC_RHNCK(leave); |
65efcfce LB |
2628 | } |
2629 | ||
2630 | ||
2631 | /*********************************************************************** | |
2632 | * Enable/Disable | |
2633 | ***********************************************************************/ | |
2634 | ||
d62a17ae | 2635 | void vnc_import_bgp_redist_enable(struct bgp *bgp, afi_t afi) |
65efcfce | 2636 | { |
d62a17ae | 2637 | /* iterate over bgp unicast v4 and v6 routes, call |
2638 | * vnc_import_bgp_add_route */ | |
65efcfce | 2639 | |
9bcb3eef | 2640 | struct bgp_dest *dest; |
65efcfce | 2641 | |
d62a17ae | 2642 | vnc_zlog_debug_verbose("%s: entry, afi=%d", __func__, afi); |
65efcfce | 2643 | |
d62a17ae | 2644 | if (bgp->rfapi_cfg->redist[afi][ZEBRA_ROUTE_BGP_DIRECT]) { |
2645 | vnc_zlog_debug_verbose( | |
2646 | "%s: already enabled for afi %d, skipping", __func__, | |
2647 | afi); | |
2648 | return; | |
2649 | } | |
2650 | bgp->rfapi_cfg->redist[afi][ZEBRA_ROUTE_BGP_DIRECT] = 1; | |
65efcfce | 2651 | |
9bcb3eef DS |
2652 | for (dest = bgp_table_top(bgp->rib[afi][SAFI_UNICAST]); dest; |
2653 | dest = bgp_route_next(dest)) { | |
65efcfce | 2654 | |
40381db7 | 2655 | struct bgp_path_info *bpi; |
65efcfce | 2656 | |
9bcb3eef | 2657 | for (bpi = bgp_dest_get_bgp_path_info(dest); bpi; |
6f94b685 | 2658 | bpi = bpi->next) { |
65efcfce | 2659 | |
40381db7 | 2660 | if (CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED)) |
d62a17ae | 2661 | continue; |
65efcfce | 2662 | |
9bcb3eef | 2663 | vnc_import_bgp_add_route(bgp, bgp_dest_get_prefix(dest), |
b54892e0 | 2664 | bpi); |
d62a17ae | 2665 | } |
2666 | } | |
2667 | vnc_zlog_debug_verbose( | |
2668 | "%s: set redist[afi=%d][type=%d=ZEBRA_ROUTE_BGP_DIRECT] return", | |
2669 | __func__, afi, ZEBRA_ROUTE_BGP_DIRECT); | |
65efcfce LB |
2670 | } |
2671 | ||
d62a17ae | 2672 | void vnc_import_bgp_exterior_redist_enable(struct bgp *bgp, afi_t afi) |
65efcfce | 2673 | { |
d62a17ae | 2674 | struct bgp *bgp_exterior; |
9bcb3eef | 2675 | struct bgp_dest *dest; |
65efcfce | 2676 | |
d62a17ae | 2677 | bgp_exterior = bgp->rfapi_cfg->redist_bgp_exterior_view; |
65efcfce | 2678 | |
d62a17ae | 2679 | if (bgp->rfapi_cfg->redist[afi][ZEBRA_ROUTE_BGP_DIRECT_EXT]) { |
2680 | vnc_zlog_debug_verbose( | |
2681 | "%s: already enabled for afi %d, skipping", __func__, | |
2682 | afi); | |
2683 | return; | |
2684 | } | |
2685 | bgp->rfapi_cfg->redist[afi][ZEBRA_ROUTE_BGP_DIRECT_EXT] = 1; | |
65efcfce | 2686 | |
d62a17ae | 2687 | if (!bgp_exterior) { |
2688 | vnc_zlog_debug_verbose( | |
2689 | "%s: no exterior view set yet, no routes to import yet", | |
2690 | __func__); | |
2691 | return; | |
2692 | } | |
65efcfce | 2693 | |
9bcb3eef DS |
2694 | for (dest = bgp_table_top(bgp_exterior->rib[afi][SAFI_UNICAST]); dest; |
2695 | dest = bgp_route_next(dest)) { | |
65efcfce | 2696 | |
40381db7 | 2697 | struct bgp_path_info *bpi; |
65efcfce | 2698 | |
9bcb3eef | 2699 | for (bpi = bgp_dest_get_bgp_path_info(dest); bpi; |
6f94b685 | 2700 | bpi = bpi->next) { |
65efcfce | 2701 | |
40381db7 | 2702 | if (CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED)) |
d62a17ae | 2703 | continue; |
65efcfce | 2704 | |
b54892e0 | 2705 | vnc_import_bgp_exterior_add_route( |
9bcb3eef | 2706 | bgp_exterior, bgp_dest_get_prefix(dest), bpi); |
d62a17ae | 2707 | } |
2708 | } | |
2709 | vnc_zlog_debug_verbose( | |
2710 | "%s: set redist[afi=%d][type=%d=ZEBRA_ROUTE_BGP_DIRECT] return", | |
2711 | __func__, afi, ZEBRA_ROUTE_BGP_DIRECT); | |
65efcfce LB |
2712 | } |
2713 | ||
2714 | /* | |
2715 | * This function is for populating a newly-created Import Table | |
2716 | */ | |
d62a17ae | 2717 | void vnc_import_bgp_exterior_redist_enable_it( |
2718 | struct bgp *bgp, afi_t afi, struct rfapi_import_table *it_only) | |
65efcfce | 2719 | { |
d62a17ae | 2720 | struct bgp *bgp_exterior; |
9bcb3eef | 2721 | struct bgp_dest *dest; |
65efcfce | 2722 | |
d62a17ae | 2723 | vnc_zlog_debug_verbose("%s: entry", __func__); |
65efcfce | 2724 | |
d62a17ae | 2725 | bgp_exterior = bgp->rfapi_cfg->redist_bgp_exterior_view; |
65efcfce | 2726 | |
d62a17ae | 2727 | if (!bgp->rfapi_cfg->redist[afi][ZEBRA_ROUTE_BGP_DIRECT_EXT]) { |
2728 | vnc_zlog_debug_verbose("%s: not enabled for afi %d, skipping", | |
2729 | __func__, afi); | |
2730 | return; | |
2731 | } | |
65efcfce | 2732 | |
d62a17ae | 2733 | if (!bgp_exterior) { |
2734 | vnc_zlog_debug_verbose( | |
2735 | "%s: no exterior view set yet, no routes to import yet", | |
2736 | __func__); | |
2737 | return; | |
2738 | } | |
65efcfce | 2739 | |
9bcb3eef DS |
2740 | for (dest = bgp_table_top(bgp_exterior->rib[afi][SAFI_UNICAST]); dest; |
2741 | dest = bgp_route_next(dest)) { | |
65efcfce | 2742 | |
40381db7 | 2743 | struct bgp_path_info *bpi; |
65efcfce | 2744 | |
9bcb3eef | 2745 | for (bpi = bgp_dest_get_bgp_path_info(dest); bpi; |
6f94b685 | 2746 | bpi = bpi->next) { |
65efcfce | 2747 | |
40381db7 | 2748 | if (CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED)) |
d62a17ae | 2749 | continue; |
65efcfce | 2750 | |
d62a17ae | 2751 | vnc_import_bgp_exterior_add_route_it( |
9bcb3eef | 2752 | bgp_exterior, bgp_dest_get_prefix(dest), bpi, |
b54892e0 | 2753 | it_only); |
d62a17ae | 2754 | } |
2755 | } | |
65efcfce LB |
2756 | } |
2757 | ||
2758 | ||
d62a17ae | 2759 | void vnc_import_bgp_redist_disable(struct bgp *bgp, afi_t afi) |
65efcfce | 2760 | { |
d62a17ae | 2761 | /* |
2762 | * iterate over vpn routes, find routes of type ZEBRA_ROUTE_BGP_DIRECT, | |
2763 | * delete (call timer expire immediately) | |
2764 | */ | |
9bcb3eef DS |
2765 | struct bgp_dest *dest1; |
2766 | struct bgp_dest *dest2; | |
d62a17ae | 2767 | |
2768 | vnc_zlog_debug_verbose("%s: entry", __func__); | |
2769 | ||
2770 | if (!bgp->rfapi_cfg->redist[afi][ZEBRA_ROUTE_BGP_DIRECT]) { | |
2771 | vnc_zlog_debug_verbose( | |
2772 | "%s: already disabled for afi %d, skipping", __func__, | |
2773 | afi); | |
2774 | return; | |
2775 | } | |
2776 | ||
2777 | /* | |
2778 | * Two-level table for SAFI_MPLS_VPN | |
2779 | * Be careful when changing the things we iterate over | |
2780 | */ | |
9bcb3eef DS |
2781 | for (dest1 = bgp_table_top(bgp->rib[afi][SAFI_MPLS_VPN]); dest1; |
2782 | dest1 = bgp_route_next(dest1)) { | |
2783 | const struct prefix *dest1_p; | |
d62a17ae | 2784 | |
9bcb3eef | 2785 | if (!bgp_dest_has_bgp_path_info_data(dest1)) |
52a44d64 | 2786 | continue; |
d62a17ae | 2787 | |
9bcb3eef DS |
2788 | dest1_p = bgp_dest_get_prefix(dest1); |
2789 | for (dest2 = bgp_table_top(bgp_dest_get_bgp_table_info(dest1)); | |
2790 | dest2; dest2 = bgp_route_next(dest2)) { | |
2791 | const struct prefix *dest2_p = | |
2792 | bgp_dest_get_prefix(dest2); | |
52a44d64 DS |
2793 | struct bgp_path_info *bpi; |
2794 | struct bgp_path_info *nextbpi; | |
d62a17ae | 2795 | |
9bcb3eef | 2796 | for (bpi = bgp_dest_get_bgp_path_info(dest2); bpi; |
52a44d64 | 2797 | bpi = nextbpi) { |
d62a17ae | 2798 | |
52a44d64 | 2799 | nextbpi = bpi->next; |
b575a12c | 2800 | |
52a44d64 DS |
2801 | if (bpi->type != ZEBRA_ROUTE_BGP_DIRECT) |
2802 | continue; | |
d62a17ae | 2803 | |
52a44d64 DS |
2804 | struct rfapi_descriptor *rfd; |
2805 | vncHDBgpDirect.peer = bpi->peer; | |
d62a17ae | 2806 | |
52a44d64 | 2807 | assert(bpi->extra); |
d62a17ae | 2808 | |
52a44d64 | 2809 | rfd = bpi->extra->vnc.export.rfapi_handle; |
d62a17ae | 2810 | |
52a44d64 DS |
2811 | vnc_zlog_debug_verbose( |
2812 | "%s: deleting bpi=%p, bpi->peer=%p, bpi->type=%d, bpi->sub_type=%d, bpi->extra->vnc.export.rfapi_handle=%p [passing rfd=%p]", | |
2813 | __func__, bpi, bpi->peer, bpi->type, | |
2814 | bpi->sub_type, | |
2815 | (bpi->extra ? bpi->extra->vnc.export | |
2816 | .rfapi_handle | |
2817 | : NULL), | |
2818 | rfd); | |
2819 | ||
2820 | del_vnc_route(rfd, bpi->peer, bgp, | |
9bcb3eef DS |
2821 | SAFI_MPLS_VPN, dest2_p, |
2822 | (struct prefix_rd *)dest1_p, | |
52a44d64 DS |
2823 | bpi->type, bpi->sub_type, NULL, |
2824 | 1); /* kill */ | |
2825 | ||
2826 | vncHDBgpDirect.peer = NULL; | |
d62a17ae | 2827 | } |
2828 | } | |
2829 | } | |
2830 | /* Clear RHN list */ | |
2831 | if (bgp->rfapi->resolve_nve_nexthop) { | |
2832 | struct prefix_bag *pb; | |
4b7e6066 | 2833 | struct bgp_path_info *info; |
d62a17ae | 2834 | while (!skiplist_first(bgp->rfapi->resolve_nve_nexthop, NULL, |
2835 | (void *)&pb)) { | |
40381db7 | 2836 | info = pb->ubpi; |
d62a17ae | 2837 | skiplist_delete_first(bgp->rfapi->resolve_nve_nexthop); |
18ee8310 | 2838 | bgp_path_info_unlock(info); |
d62a17ae | 2839 | } |
2840 | } | |
2841 | ||
2842 | bgp->rfapi_cfg->redist[afi][ZEBRA_ROUTE_BGP_DIRECT] = 0; | |
2843 | vnc_zlog_debug_verbose("%s: return", __func__); | |
65efcfce LB |
2844 | } |
2845 | ||
2846 | ||
d62a17ae | 2847 | void vnc_import_bgp_exterior_redist_disable(struct bgp *bgp, afi_t afi) |
65efcfce | 2848 | { |
d62a17ae | 2849 | struct rfapi_cfg *hc = bgp->rfapi_cfg; |
2850 | struct bgp *bgp_exterior = hc->redist_bgp_exterior_view; | |
65efcfce | 2851 | |
d62a17ae | 2852 | vnc_zlog_debug_verbose("%s: entry", __func__); |
65efcfce | 2853 | |
d62a17ae | 2854 | if (!hc->redist[afi][ZEBRA_ROUTE_BGP_DIRECT_EXT]) { |
2855 | vnc_zlog_debug_verbose( | |
2856 | "%s: already disabled for afi %d, skipping", __func__, | |
2857 | afi); | |
2858 | return; | |
2859 | } | |
65efcfce | 2860 | |
d62a17ae | 2861 | if (!bgp_exterior) { |
2862 | vnc_zlog_debug_verbose( | |
2863 | "%s: bgp exterior view not defined, skipping", | |
2864 | __func__); | |
2865 | return; | |
2866 | } | |
65efcfce LB |
2867 | |
2868 | ||
d62a17ae | 2869 | { |
9bcb3eef DS |
2870 | struct bgp_dest *dest; |
2871 | for (dest = bgp_table_top(bgp_exterior->rib[afi][SAFI_UNICAST]); | |
2872 | dest; dest = bgp_route_next(dest)) { | |
65efcfce | 2873 | |
40381db7 | 2874 | struct bgp_path_info *bpi; |
65efcfce | 2875 | |
9bcb3eef | 2876 | for (bpi = bgp_dest_get_bgp_path_info(dest); bpi; |
6f94b685 | 2877 | bpi = bpi->next) { |
65efcfce | 2878 | |
40381db7 | 2879 | if (CHECK_FLAG(bpi->flags, BGP_PATH_REMOVED)) |
d62a17ae | 2880 | continue; |
65efcfce | 2881 | |
b54892e0 | 2882 | vnc_import_bgp_exterior_del_route( |
9bcb3eef | 2883 | bgp_exterior, bgp_dest_get_prefix(dest), |
b54892e0 | 2884 | bpi); |
d62a17ae | 2885 | } |
2886 | } | |
65efcfce | 2887 | #if DEBUG_RHN_LIST |
d62a17ae | 2888 | print_rhn_list(__func__, NULL); |
65efcfce | 2889 | #endif |
d62a17ae | 2890 | } |
65efcfce | 2891 | |
d62a17ae | 2892 | bgp->rfapi_cfg->redist[afi][ZEBRA_ROUTE_BGP_DIRECT_EXT] = 0; |
2893 | vnc_zlog_debug_verbose("%s: return", __func__); | |
65efcfce | 2894 | } |