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d62a17ae | 1 | /* |
65efcfce LB |
2 | * |
3 | * Copyright 2009-2016, LabN Consulting, L.L.C. | |
4 | * | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU General Public License | |
8 | * as published by the Free Software Foundation; either version 2 | |
9 | * of the License, or (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
896014f4 DL |
16 | * You should have received a copy of the GNU General Public License along |
17 | * with this program; see the file COPYING; if not, write to the Free Software | |
18 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
65efcfce LB |
19 | */ |
20 | ||
21 | /* | |
22 | * File: vnc_zebra.c | |
23 | * Purpose: Handle exchange of routes between VNC and Zebra | |
24 | */ | |
25 | ||
f8b6f499 LB |
26 | #include "lib/zebra.h" |
27 | #include "lib/prefix.h" | |
28 | #include "lib/table.h" | |
29 | #include "lib/log.h" | |
30 | #include "lib/command.h" | |
31 | #include "lib/zclient.h" | |
32 | #include "lib/stream.h" | |
33 | #include "lib/memory.h" | |
65efcfce | 34 | |
f8b6f499 LB |
35 | #include "bgpd/bgpd.h" |
36 | #include "bgpd/bgp_ecommunity.h" | |
37 | #include "bgpd/bgp_route.h" | |
38 | #include "bgpd/bgp_debug.h" | |
39 | #include "bgpd/bgp_advertise.h" | |
65efcfce | 40 | |
f8b6f499 LB |
41 | #include "bgpd/rfapi/bgp_rfapi_cfg.h" |
42 | #include "bgpd/rfapi/rfapi.h" | |
43 | #include "bgpd/rfapi/rfapi_import.h" | |
44 | #include "bgpd/rfapi/rfapi_private.h" | |
45 | #include "bgpd/rfapi/vnc_zebra.h" | |
46 | #include "bgpd/rfapi/rfapi_vty.h" | |
47 | #include "bgpd/rfapi/rfapi_backend.h" | |
a3b55c25 | 48 | #include "bgpd/rfapi/vnc_debug.h" |
65efcfce | 49 | |
d62a17ae | 50 | static struct rfapi_descriptor vncHD1VR; /* Single-VR export dummy nve descr */ |
65efcfce LB |
51 | static struct zclient *zclient_vnc = NULL; |
52 | ||
53 | /*********************************************************************** | |
54 | * REDISTRIBUTE: Zebra sends updates/withdraws to BGPD | |
55 | ***********************************************************************/ | |
56 | ||
57 | /* | |
58 | * Routes coming from zebra get added to VNC here | |
59 | */ | |
74489921 RW |
60 | static void vnc_redistribute_add(struct prefix *p, u_int32_t metric, |
61 | uint8_t type) | |
65efcfce | 62 | { |
d62a17ae | 63 | struct bgp *bgp = bgp_get_default(); |
64 | struct prefix_rd prd; | |
65 | struct rfapi_ip_addr vnaddr; | |
66 | afi_t afi; | |
67 | uint32_t local_pref = | |
68 | rfp_cost_to_localpref(metric > 255 ? 255 : metric); | |
69 | ||
70 | if (!bgp) | |
71 | return; | |
72 | ||
73 | if (!bgp->rfapi_cfg) { | |
74 | vnc_zlog_debug_verbose("%s: bgp->rfapi_cfg is NULL, skipping", | |
75 | __func__); | |
76 | return; | |
77 | } | |
78 | ||
79 | afi = family2afi(p->family); | |
80 | if (!afi) { | |
81 | vnc_zlog_debug_verbose("%s: unknown prefix address family %d", | |
82 | __func__, p->family); | |
83 | return; | |
84 | } | |
85 | ||
86 | if (!bgp->rfapi_cfg->redist[afi][type]) { | |
87 | vnc_zlog_debug_verbose( | |
88 | "%s: bgp->rfapi_cfg->redist[afi=%d][type=%d] is 0, skipping", | |
89 | __func__, afi, type); | |
90 | return; | |
91 | } | |
92 | if (!bgp->rfapi_cfg->rfg_redist) { | |
93 | vnc_zlog_debug_verbose("%s: no redist nve group, skipping", | |
94 | __func__); | |
95 | return; | |
96 | } | |
97 | ||
98 | /* | |
99 | * Assume nve group's configured VN address prefix is a host | |
100 | * route which also happens to give the NVE VN address to use | |
101 | * for redistributing into VNC. | |
102 | */ | |
103 | vnaddr.addr_family = bgp->rfapi_cfg->rfg_redist->vn_prefix.family; | |
104 | switch (bgp->rfapi_cfg->rfg_redist->vn_prefix.family) { | |
105 | case AF_INET: | |
106 | if (bgp->rfapi_cfg->rfg_redist->vn_prefix.prefixlen != 32) { | |
107 | vnc_zlog_debug_verbose( | |
108 | "%s: redist nve group VN prefix len (%d) != 32, skipping", | |
109 | __func__, | |
110 | bgp->rfapi_cfg->rfg_redist->vn_prefix | |
111 | .prefixlen); | |
112 | return; | |
113 | } | |
114 | vnaddr.addr.v4 = | |
115 | bgp->rfapi_cfg->rfg_redist->vn_prefix.u.prefix4; | |
116 | break; | |
117 | case AF_INET6: | |
118 | if (bgp->rfapi_cfg->rfg_redist->vn_prefix.prefixlen != 128) { | |
119 | vnc_zlog_debug_verbose( | |
120 | "%s: redist nve group VN prefix len (%d) != 128, skipping", | |
121 | __func__, | |
122 | bgp->rfapi_cfg->rfg_redist->vn_prefix | |
123 | .prefixlen); | |
124 | return; | |
125 | } | |
126 | vnaddr.addr.v6 = | |
127 | bgp->rfapi_cfg->rfg_redist->vn_prefix.u.prefix6; | |
128 | break; | |
129 | default: | |
130 | vnc_zlog_debug_verbose( | |
131 | "%s: no redist nve group VN host prefix configured, skipping", | |
132 | __func__); | |
133 | return; | |
134 | } | |
135 | ||
136 | /* | |
137 | * Assume nve group's configured UN address prefix is a host | |
138 | * route which also happens to give the NVE UN address to use | |
139 | * for redistributing into VNC. | |
140 | */ | |
141 | ||
142 | /* | |
143 | * Set UN address in dummy nve descriptor so add_vnc_route | |
144 | * can use it in VNC tunnel SubTLV | |
145 | */ | |
146 | { | |
147 | struct rfapi_ip_prefix pfx_un; | |
148 | ||
149 | rfapiQprefix2Rprefix(&bgp->rfapi_cfg->rfg_redist->un_prefix, | |
150 | &pfx_un); | |
151 | ||
152 | switch (pfx_un.prefix.addr_family) { | |
153 | case AF_INET: | |
154 | if (pfx_un.length != 32) { | |
155 | vnc_zlog_debug_verbose( | |
156 | "%s: redist nve group UN prefix len (%d) != 32, skipping", | |
157 | __func__, pfx_un.length); | |
158 | return; | |
159 | } | |
160 | break; | |
161 | case AF_INET6: | |
162 | if (pfx_un.length != 128) { | |
163 | vnc_zlog_debug_verbose( | |
164 | "%s: redist nve group UN prefix len (%d) != 128, skipping", | |
165 | __func__, pfx_un.length); | |
166 | return; | |
167 | } | |
168 | break; | |
169 | default: | |
170 | vnc_zlog_debug_verbose( | |
171 | "%s: no redist nve group UN host prefix configured, skipping", | |
172 | __func__); | |
173 | return; | |
174 | } | |
175 | ||
176 | vncHD1VR.un_addr = pfx_un.prefix; | |
177 | ||
178 | if (!vncHD1VR.peer) { | |
179 | /* | |
180 | * Same setup as in rfapi_open() | |
181 | */ | |
182 | vncHD1VR.peer = peer_new(bgp); | |
183 | vncHD1VR.peer->status = | |
184 | Established; /* keep bgp core happy */ | |
185 | bgp_sync_delete(vncHD1VR.peer); /* don't need these */ | |
424ab01d QY |
186 | |
187 | // since this peer is not on the I/O thread, this lock | |
188 | // is not strictly | |
189 | // necessary, but serves as a reminder to those who may | |
190 | // meddle... | |
191 | pthread_mutex_lock(&vncHD1VR.peer->io_mtx); | |
192 | { | |
193 | // we don't need any I/O related facilities | |
194 | if (vncHD1VR.peer->ibuf) | |
195 | stream_fifo_free(vncHD1VR.peer->ibuf); | |
196 | if (vncHD1VR.peer->obuf) | |
197 | stream_fifo_free(vncHD1VR.peer->obuf); | |
198 | ||
199 | if (vncHD1VR.peer->ibuf_work) | |
200 | stream_free(vncHD1VR.peer->ibuf_work); | |
201 | if (vncHD1VR.peer->obuf_work) | |
202 | stream_free(vncHD1VR.peer->obuf_work); | |
203 | ||
d62a17ae | 204 | vncHD1VR.peer->ibuf = NULL; |
d62a17ae | 205 | vncHD1VR.peer->obuf = NULL; |
424ab01d QY |
206 | vncHD1VR.peer->obuf_work = NULL; |
207 | vncHD1VR.peer->ibuf_work = NULL; | |
d62a17ae | 208 | } |
424ab01d QY |
209 | pthread_mutex_unlock(&vncHD1VR.peer->io_mtx); |
210 | ||
d62a17ae | 211 | /* base code assumes have valid host pointer */ |
212 | vncHD1VR.peer->host = | |
213 | XSTRDUP(MTYPE_BGP_PEER_HOST, ".zebra."); | |
214 | ||
215 | /* Mark peer as belonging to HD */ | |
216 | SET_FLAG(vncHD1VR.peer->flags, PEER_FLAG_IS_RFAPI_HD); | |
217 | } | |
218 | } | |
219 | ||
220 | memset(&prd, 0, sizeof(prd)); | |
221 | prd = bgp->rfapi_cfg->rfg_redist->rd; | |
222 | prd.family = AF_UNSPEC; | |
223 | prd.prefixlen = 64; | |
224 | ||
225 | add_vnc_route(&vncHD1VR, /* cookie + UN addr */ | |
226 | bgp, SAFI_MPLS_VPN, p, &prd, &vnaddr, &local_pref, | |
227 | &(bgp->rfapi_cfg->redist_lifetime), | |
228 | NULL, /* RFP options */ | |
229 | NULL, /* struct rfapi_un_option */ | |
230 | NULL, /* struct rfapi_vn_option */ | |
231 | bgp->rfapi_cfg->rfg_redist->rt_export_list, NULL, | |
232 | NULL, /* label: default */ | |
233 | type, BGP_ROUTE_REDISTRIBUTE, 0); /* flags */ | |
65efcfce LB |
234 | } |
235 | ||
236 | /* | |
237 | * Route deletions from zebra propagate to VNC here | |
238 | */ | |
d62a17ae | 239 | static void vnc_redistribute_delete(struct prefix *p, uint8_t type) |
65efcfce | 240 | { |
d62a17ae | 241 | struct bgp *bgp = bgp_get_default(); |
242 | struct prefix_rd prd; | |
243 | afi_t afi; | |
244 | ||
245 | if (!bgp) | |
246 | return; | |
247 | ||
248 | if (!bgp->rfapi_cfg) { | |
249 | vnc_zlog_debug_verbose("%s: bgp->rfapi_cfg is NULL, skipping", | |
250 | __func__); | |
251 | return; | |
252 | } | |
253 | afi = family2afi(p->family); | |
254 | if (!afi) { | |
255 | vnc_zlog_debug_verbose("%s: unknown prefix address family %d", | |
256 | __func__, p->family); | |
257 | return; | |
258 | } | |
259 | if (!bgp->rfapi_cfg->redist[afi][type]) { | |
260 | vnc_zlog_debug_verbose( | |
261 | "%s: bgp->rfapi_cfg->redist[afi=%d][type=%d] is 0, skipping", | |
262 | __func__, afi, type); | |
263 | return; | |
264 | } | |
265 | if (!bgp->rfapi_cfg->rfg_redist) { | |
266 | vnc_zlog_debug_verbose("%s: no redist nve group, skipping", | |
267 | __func__); | |
268 | return; | |
269 | } | |
270 | ||
271 | memset(&prd, 0, sizeof(prd)); | |
272 | prd = bgp->rfapi_cfg->rfg_redist->rd; | |
273 | prd.family = AF_UNSPEC; | |
274 | prd.prefixlen = 64; | |
275 | ||
276 | del_vnc_route(&vncHD1VR, /* use dummy ptr as cookie */ | |
277 | vncHD1VR.peer, bgp, SAFI_MPLS_VPN, p, &prd, type, | |
278 | BGP_ROUTE_REDISTRIBUTE, NULL, 0); | |
65efcfce LB |
279 | } |
280 | ||
281 | /* | |
282 | * Flush all redistributed routes of type <type> | |
283 | */ | |
d62a17ae | 284 | static void vnc_redistribute_withdraw(struct bgp *bgp, afi_t afi, uint8_t type) |
65efcfce | 285 | { |
d62a17ae | 286 | struct prefix_rd prd; |
287 | struct bgp_table *table; | |
288 | struct bgp_node *prn; | |
289 | struct bgp_node *rn; | |
290 | ||
291 | vnc_zlog_debug_verbose("%s: entry", __func__); | |
292 | ||
293 | if (!bgp) | |
294 | return; | |
295 | if (!bgp->rfapi_cfg) { | |
296 | vnc_zlog_debug_verbose("%s: bgp->rfapi_cfg is NULL, skipping", | |
297 | __func__); | |
298 | return; | |
299 | } | |
300 | ||
301 | /* | |
302 | * Loop over all the RDs | |
303 | */ | |
304 | for (prn = bgp_table_top(bgp->rib[afi][SAFI_MPLS_VPN]); prn; | |
305 | prn = bgp_route_next(prn)) { | |
306 | memset(&prd, 0, sizeof(prd)); | |
307 | prd.family = AF_UNSPEC; | |
308 | prd.prefixlen = 64; | |
309 | memcpy(prd.val, prn->p.u.val, 8); | |
310 | ||
311 | /* This is the per-RD table of prefixes */ | |
312 | table = prn->info; | |
313 | ||
314 | for (rn = bgp_table_top(table); rn; rn = bgp_route_next(rn)) { | |
315 | ||
316 | struct bgp_info *ri; | |
317 | ||
318 | for (ri = rn->info; ri; ri = ri->next) { | |
319 | if (ri->type | |
320 | == type) { /* has matching redist type */ | |
321 | break; | |
322 | } | |
323 | } | |
324 | if (ri) { | |
325 | del_vnc_route( | |
326 | &vncHD1VR, /* use dummy ptr as cookie */ | |
327 | vncHD1VR.peer, bgp, SAFI_MPLS_VPN, | |
328 | &(rn->p), &prd, type, | |
329 | BGP_ROUTE_REDISTRIBUTE, NULL, 0); | |
330 | } | |
331 | } | |
332 | } | |
333 | vnc_zlog_debug_verbose("%s: return", __func__); | |
65efcfce LB |
334 | } |
335 | ||
336 | /* | |
337 | * Zebra route add and delete treatment. | |
338 | * | |
339 | * Assumes 1 nexthop | |
340 | */ | |
74489921 RW |
341 | static int vnc_zebra_read_route(int command, struct zclient *zclient, |
342 | zebra_size_t length, vrf_id_t vrf_id) | |
65efcfce | 343 | { |
74489921 RW |
344 | struct zapi_route api; |
345 | int add; | |
d62a17ae | 346 | |
74489921 RW |
347 | if (zapi_route_decode(zclient->ibuf, &api) < 0) |
348 | return -1; | |
65efcfce | 349 | |
74489921 RW |
350 | /* we completely ignore srcdest routes for now. */ |
351 | if (CHECK_FLAG(api.message, ZAPI_MESSAGE_SRCPFX)) | |
d62a17ae | 352 | return 0; |
353 | ||
74489921 RW |
354 | add = (command == ZEBRA_REDISTRIBUTE_ROUTE_ADD); |
355 | if (add) | |
356 | vnc_redistribute_add(&api.prefix, api.metric, api.type); | |
d62a17ae | 357 | else |
74489921 | 358 | vnc_redistribute_delete(&api.prefix, api.type); |
d62a17ae | 359 | |
74489921 RW |
360 | if (BGP_DEBUG(zebra, ZEBRA)) { |
361 | char buf[PREFIX_STRLEN]; | |
d62a17ae | 362 | |
74489921 RW |
363 | prefix2str(&api.prefix, buf, sizeof(buf)); |
364 | vnc_zlog_debug_verbose( | |
365 | "%s: Zebra rcvd: route delete %s %s metric %u", | |
366 | __func__, zebra_route_string(api.type), buf, | |
367 | api.metric); | |
d62a17ae | 368 | } |
369 | ||
370 | return 0; | |
65efcfce LB |
371 | } |
372 | ||
373 | /*********************************************************************** | |
374 | * vnc_bgp_zebra_*: VNC sends updates/withdraws to Zebra | |
375 | ***********************************************************************/ | |
376 | ||
377 | /* | |
378 | * low-level message builder | |
379 | */ | |
a74e593b RW |
380 | static void vnc_zebra_route_msg(struct prefix *p, unsigned int nhp_count, |
381 | void *nhp_ary, int add) /* 1 = add, 0 = del */ | |
65efcfce | 382 | { |
2ad4f093 RW |
383 | struct zapi_route api; |
384 | struct zapi_nexthop *api_nh; | |
385 | int i; | |
386 | ||
d62a17ae | 387 | if (!nhp_count) { |
388 | vnc_zlog_debug_verbose("%s: empty nexthop list, skipping", | |
389 | __func__); | |
390 | return; | |
391 | } | |
392 | ||
2ad4f093 RW |
393 | memset(&api, 0, sizeof(api)); |
394 | api.vrf_id = VRF_DEFAULT; | |
395 | api.type = ZEBRA_ROUTE_VNC; | |
396 | api.safi = SAFI_UNICAST; | |
397 | api.prefix = *p; | |
398 | ||
399 | /* Nexthops */ | |
400 | SET_FLAG(api.message, ZAPI_MESSAGE_NEXTHOP); | |
a74e593b RW |
401 | api.nexthop_num = MIN(nhp_count, multipath_num); |
402 | for (i = 0; i < api.nexthop_num; i++) { | |
2ad4f093 RW |
403 | struct in_addr *nhp_ary4; |
404 | struct in6_addr *nhp_ary6; | |
405 | ||
406 | api_nh = &api.nexthops[i]; | |
407 | switch (p->family) { | |
408 | case AF_INET: | |
409 | nhp_ary4 = nhp_ary; | |
9913029c RW |
410 | memcpy(&api_nh->gate.ipv4, &nhp_ary4[i], |
411 | sizeof(api_nh->gate.ipv4)); | |
412 | api_nh->type = NEXTHOP_TYPE_IPV4; | |
2ad4f093 RW |
413 | break; |
414 | case AF_INET6: | |
415 | nhp_ary6 = nhp_ary; | |
9913029c RW |
416 | memcpy(&api_nh->gate.ipv6, &nhp_ary6[i], |
417 | sizeof(api_nh->gate.ipv6)); | |
418 | api_nh->type = NEXTHOP_TYPE_IPV6; | |
2ad4f093 | 419 | break; |
9913029c | 420 | } |
2ad4f093 | 421 | } |
9913029c | 422 | |
2ad4f093 RW |
423 | if (BGP_DEBUG(zebra, ZEBRA)) { |
424 | char buf[PREFIX_STRLEN]; | |
d62a17ae | 425 | |
2ad4f093 | 426 | prefix2str(&api.prefix, buf, sizeof(buf)); |
d62a17ae | 427 | vnc_zlog_debug_verbose( |
2ad4f093 RW |
428 | "%s: Zebra send: route %s %s, nhp_count=%d", __func__, |
429 | (add ? "add" : "del"), buf, nhp_count); | |
d62a17ae | 430 | } |
2ad4f093 RW |
431 | |
432 | zclient_route_send((add ? ZEBRA_ROUTE_ADD : ZEBRA_ROUTE_DELETE), | |
433 | zclient_vnc, &api); | |
65efcfce LB |
434 | } |
435 | ||
436 | ||
437 | static void | |
a74e593b RW |
438 | nve_list_to_nh_array(u_char family, struct list *nve_list, |
439 | unsigned int *nh_count_ret, | |
d62a17ae | 440 | void **nh_ary_ret, /* returned address array */ |
441 | void **nhp_ary_ret) /* returned pointer array */ | |
65efcfce | 442 | { |
d62a17ae | 443 | int nve_count = listcount(nve_list); |
65efcfce | 444 | |
d62a17ae | 445 | *nh_count_ret = 0; |
446 | *nh_ary_ret = NULL; | |
447 | *nhp_ary_ret = NULL; | |
65efcfce | 448 | |
d62a17ae | 449 | if (!nve_count) { |
450 | vnc_zlog_debug_verbose("%s: empty nve_list, skipping", | |
451 | __func__); | |
452 | return; | |
453 | } | |
65efcfce | 454 | |
d62a17ae | 455 | if (family == AF_INET) { |
456 | struct listnode *ln; | |
457 | struct in_addr *iap; | |
458 | struct in_addr **v; | |
65efcfce | 459 | |
d62a17ae | 460 | /* |
461 | * Array of nexthop addresses | |
462 | */ | |
463 | *nh_ary_ret = | |
464 | XCALLOC(MTYPE_TMP, nve_count * sizeof(struct in_addr)); | |
65efcfce | 465 | |
d62a17ae | 466 | /* |
467 | * Array of pointers to nexthop addresses | |
468 | */ | |
469 | *nhp_ary_ret = XCALLOC(MTYPE_TMP, | |
470 | nve_count * sizeof(struct in_addr *)); | |
471 | iap = *nh_ary_ret; | |
472 | v = *nhp_ary_ret; | |
65efcfce | 473 | |
d62a17ae | 474 | for (ln = listhead(nve_list); ln; ln = listnextnode(ln)) { |
65efcfce | 475 | |
d62a17ae | 476 | struct rfapi_descriptor *irfd; |
477 | struct prefix nhp; | |
65efcfce | 478 | |
d62a17ae | 479 | irfd = listgetdata(ln); |
65efcfce | 480 | |
d62a17ae | 481 | if (rfapiRaddr2Qprefix(&irfd->vn_addr, &nhp)) |
482 | continue; | |
65efcfce | 483 | |
d62a17ae | 484 | *iap = nhp.u.prefix4; |
485 | *v = iap; | |
486 | vnc_zlog_debug_verbose( | |
487 | "%s: ipadr: (%p)<-0x%x, ptr: (%p)<-%p", | |
488 | __func__, iap, nhp.u.prefix4.s_addr, v, iap); | |
65efcfce | 489 | |
d62a17ae | 490 | ++iap; |
491 | ++v; | |
492 | ++*nh_count_ret; | |
493 | } | |
65efcfce | 494 | |
d62a17ae | 495 | } else if (family == AF_INET6) { |
65efcfce | 496 | |
d62a17ae | 497 | struct listnode *ln; |
65efcfce | 498 | |
d62a17ae | 499 | *nh_ary_ret = |
500 | XCALLOC(MTYPE_TMP, nve_count * sizeof(struct in6_addr)); | |
65efcfce | 501 | |
d62a17ae | 502 | *nhp_ary_ret = XCALLOC(MTYPE_TMP, |
503 | nve_count * sizeof(struct in6_addr *)); | |
65efcfce | 504 | |
d62a17ae | 505 | for (ln = listhead(nve_list); ln; ln = listnextnode(ln)) { |
65efcfce | 506 | |
d62a17ae | 507 | struct rfapi_descriptor *irfd; |
508 | struct in6_addr *iap = *nh_ary_ret; | |
509 | struct in6_addr **v = *nhp_ary_ret; | |
510 | struct prefix nhp; | |
65efcfce | 511 | |
d62a17ae | 512 | irfd = listgetdata(ln); |
65efcfce | 513 | |
d62a17ae | 514 | if (rfapiRaddr2Qprefix(&irfd->vn_addr, &nhp)) |
515 | continue; | |
65efcfce | 516 | |
d62a17ae | 517 | *iap = nhp.u.prefix6; |
518 | *v = iap; | |
65efcfce | 519 | |
d62a17ae | 520 | ++iap; |
521 | ++v; | |
522 | ++*nh_count_ret; | |
523 | } | |
524 | } | |
65efcfce LB |
525 | } |
526 | ||
d62a17ae | 527 | static void import_table_to_nve_list_zebra(struct bgp *bgp, |
528 | struct rfapi_import_table *it, | |
529 | struct list **nves, uint8_t family) | |
65efcfce | 530 | { |
d62a17ae | 531 | struct listnode *node; |
532 | struct rfapi_rfg_name *rfgn; | |
533 | ||
534 | /* | |
535 | * Loop over the list of NVE-Groups configured for | |
536 | * exporting to direct-bgp. | |
537 | * | |
538 | * Build a list of NVEs that use this import table | |
539 | */ | |
540 | *nves = NULL; | |
541 | for (ALL_LIST_ELEMENTS_RO(bgp->rfapi_cfg->rfg_export_zebra_l, node, | |
542 | rfgn)) { | |
543 | ||
544 | /* | |
545 | * If this NVE-Group's import table matches the current one | |
546 | */ | |
547 | if (rfgn->rfg && rfgn->rfg->nves | |
548 | && rfgn->rfg->rfapi_import_table == it) { | |
549 | ||
550 | nve_group_to_nve_list(rfgn->rfg, nves, family); | |
551 | } | |
552 | } | |
65efcfce LB |
553 | } |
554 | ||
d62a17ae | 555 | static void vnc_zebra_add_del_prefix(struct bgp *bgp, |
556 | struct rfapi_import_table *import_table, | |
557 | struct route_node *rn, | |
558 | int add) /* !0 = add, 0 = del */ | |
65efcfce | 559 | { |
d62a17ae | 560 | struct list *nves; |
561 | ||
a74e593b | 562 | unsigned int nexthop_count = 0; |
d62a17ae | 563 | void *nh_ary = NULL; |
564 | void *nhp_ary = NULL; | |
565 | ||
566 | vnc_zlog_debug_verbose("%s: entry, add=%d", __func__, add); | |
567 | ||
568 | if (zclient_vnc->sock < 0) | |
569 | return; | |
570 | ||
571 | if (rn->p.family != AF_INET && rn->p.family != AF_INET6) { | |
572 | zlog_err("%s: invalid route node addr family", __func__); | |
573 | return; | |
574 | } | |
575 | ||
576 | if (!zclient_vnc->redist[family2afi(rn->p.family)][ZEBRA_ROUTE_VNC]) | |
577 | return; | |
578 | ||
579 | if (!bgp->rfapi_cfg) { | |
580 | vnc_zlog_debug_verbose("%s: bgp->rfapi_cfg is NULL, skipping", | |
581 | __func__); | |
582 | return; | |
583 | } | |
584 | if (!listcount(bgp->rfapi_cfg->rfg_export_zebra_l)) { | |
585 | vnc_zlog_debug_verbose( | |
586 | "%s: no zebra export nve group, skipping", __func__); | |
587 | return; | |
588 | } | |
589 | ||
590 | import_table_to_nve_list_zebra(bgp, import_table, &nves, rn->p.family); | |
591 | ||
592 | if (nves) { | |
593 | nve_list_to_nh_array(rn->p.family, nves, &nexthop_count, | |
594 | &nh_ary, &nhp_ary); | |
595 | ||
affe9e99 | 596 | list_delete_and_null(&nves); |
d62a17ae | 597 | |
598 | if (nexthop_count) | |
599 | vnc_zebra_route_msg(&rn->p, nexthop_count, nhp_ary, | |
600 | add); | |
601 | } | |
602 | ||
603 | if (nhp_ary) | |
604 | XFREE(MTYPE_TMP, nhp_ary); | |
605 | if (nh_ary) | |
606 | XFREE(MTYPE_TMP, nh_ary); | |
65efcfce LB |
607 | } |
608 | ||
d62a17ae | 609 | void vnc_zebra_add_prefix(struct bgp *bgp, |
610 | struct rfapi_import_table *import_table, | |
611 | struct route_node *rn) | |
65efcfce | 612 | { |
d62a17ae | 613 | vnc_zebra_add_del_prefix(bgp, import_table, rn, 1); |
65efcfce LB |
614 | } |
615 | ||
d62a17ae | 616 | void vnc_zebra_del_prefix(struct bgp *bgp, |
617 | struct rfapi_import_table *import_table, | |
618 | struct route_node *rn) | |
65efcfce | 619 | { |
d62a17ae | 620 | vnc_zebra_add_del_prefix(bgp, import_table, rn, 0); |
65efcfce LB |
621 | } |
622 | ||
623 | ||
d62a17ae | 624 | static void vnc_zebra_add_del_nve(struct bgp *bgp, struct rfapi_descriptor *rfd, |
625 | int add) /* 0 = del, !0 = add */ | |
65efcfce | 626 | { |
d62a17ae | 627 | struct listnode *node; |
628 | struct rfapi_rfg_name *rfgn; | |
629 | struct rfapi_nve_group_cfg *rfg = rfd->rfg; | |
630 | afi_t afi = family2afi(rfd->vn_addr.addr_family); | |
631 | struct prefix nhp; | |
632 | // struct prefix *nhpp; | |
633 | void *pAddr; | |
634 | ||
635 | vnc_zlog_debug_verbose("%s: entry, add=%d", __func__, add); | |
636 | ||
637 | if (zclient_vnc->sock < 0) | |
638 | return; | |
639 | ||
640 | if (!zclient_vnc->redist[afi][ZEBRA_ROUTE_VNC]) | |
641 | return; | |
642 | ||
643 | if (afi != AFI_IP && afi != AFI_IP6) { | |
644 | zlog_err("%s: invalid vn addr family", __func__); | |
645 | return; | |
646 | } | |
647 | ||
648 | if (!bgp) | |
649 | return; | |
650 | if (!bgp->rfapi_cfg) { | |
651 | vnc_zlog_debug_verbose("%s: bgp->rfapi_cfg is NULL, skipping", | |
652 | __func__); | |
653 | return; | |
654 | } | |
655 | ||
656 | if (rfapiRaddr2Qprefix(&rfd->vn_addr, &nhp)) { | |
657 | vnc_zlog_debug_verbose("%s: can't convert vn address, skipping", | |
658 | __func__); | |
659 | return; | |
660 | } | |
661 | ||
662 | pAddr = &nhp.u.prefix4; | |
663 | ||
664 | /* | |
665 | * Loop over the list of NVE-Groups configured for | |
666 | * exporting to zebra and see if this new NVE's | |
667 | * group is among them. | |
668 | */ | |
669 | for (ALL_LIST_ELEMENTS_RO(bgp->rfapi_cfg->rfg_export_zebra_l, node, | |
670 | rfgn)) { | |
671 | ||
672 | /* | |
673 | * Yes, this NVE's group is configured for export to zebra | |
674 | */ | |
675 | if (rfgn->rfg == rfg) { | |
676 | ||
677 | struct route_table *rt = NULL; | |
678 | struct route_node *rn; | |
679 | struct rfapi_import_table *import_table; | |
680 | import_table = rfg->rfapi_import_table; | |
681 | ||
682 | vnc_zlog_debug_verbose( | |
683 | "%s: this nve's group is in zebra export list", | |
684 | __func__); | |
685 | ||
686 | rt = import_table->imported_vpn[afi]; | |
687 | ||
688 | /* | |
689 | * Walk the NVE-Group's VNC Import table | |
690 | */ | |
691 | for (rn = route_top(rt); rn; rn = route_next(rn)) { | |
692 | ||
693 | if (rn->info) { | |
694 | ||
695 | vnc_zlog_debug_verbose( | |
696 | "%s: sending %s", __func__, | |
697 | (add ? "add" : "del")); | |
698 | vnc_zebra_route_msg(&rn->p, 1, &pAddr, | |
699 | add); | |
700 | } | |
701 | } | |
702 | } | |
703 | } | |
65efcfce LB |
704 | } |
705 | ||
d62a17ae | 706 | void vnc_zebra_add_nve(struct bgp *bgp, struct rfapi_descriptor *rfd) |
65efcfce | 707 | { |
d62a17ae | 708 | vnc_zebra_add_del_nve(bgp, rfd, 1); |
65efcfce LB |
709 | } |
710 | ||
d62a17ae | 711 | void vnc_zebra_del_nve(struct bgp *bgp, struct rfapi_descriptor *rfd) |
65efcfce | 712 | { |
d62a17ae | 713 | vnc_zebra_add_del_nve(bgp, rfd, 0); |
65efcfce LB |
714 | } |
715 | ||
d62a17ae | 716 | static void vnc_zebra_add_del_group_afi(struct bgp *bgp, |
717 | struct rfapi_nve_group_cfg *rfg, | |
718 | afi_t afi, int add) | |
65efcfce | 719 | { |
d62a17ae | 720 | struct route_table *rt = NULL; |
721 | struct route_node *rn; | |
722 | struct rfapi_import_table *import_table; | |
723 | uint8_t family = afi2family(afi); | |
724 | ||
725 | struct list *nves = NULL; | |
a74e593b | 726 | unsigned int nexthop_count = 0; |
d62a17ae | 727 | void *nh_ary = NULL; |
728 | void *nhp_ary = NULL; | |
729 | ||
730 | vnc_zlog_debug_verbose("%s: entry", __func__); | |
731 | import_table = rfg->rfapi_import_table; | |
732 | if (!import_table) { | |
733 | vnc_zlog_debug_verbose( | |
734 | "%s: import table not defined, returning", __func__); | |
735 | return; | |
736 | } | |
737 | ||
738 | if (afi == AFI_IP || afi == AFI_IP6) { | |
739 | rt = import_table->imported_vpn[afi]; | |
740 | } else { | |
741 | zlog_err("%s: bad afi %d", __func__, afi); | |
742 | return; | |
743 | } | |
744 | ||
745 | if (!family) { | |
746 | zlog_err("%s: computed bad family: %d", __func__, family); | |
747 | return; | |
748 | } | |
749 | ||
750 | if (!rfg->nves) { | |
751 | /* avoid segfault below if list doesn't exist */ | |
752 | vnc_zlog_debug_verbose("%s: no NVEs in this group", __func__); | |
753 | return; | |
754 | } | |
755 | ||
756 | nve_group_to_nve_list(rfg, &nves, family); | |
757 | if (nves) { | |
758 | vnc_zlog_debug_verbose("%s: have nves", __func__); | |
759 | nve_list_to_nh_array(family, nves, &nexthop_count, &nh_ary, | |
760 | &nhp_ary); | |
761 | ||
762 | vnc_zlog_debug_verbose("%s: family: %d, nve count: %d", | |
763 | __func__, family, nexthop_count); | |
764 | ||
affe9e99 | 765 | list_delete_and_null(&nves); |
d62a17ae | 766 | |
767 | if (nexthop_count) { | |
768 | /* | |
769 | * Walk the NVE-Group's VNC Import table | |
770 | */ | |
771 | for (rn = route_top(rt); rn; rn = route_next(rn)) { | |
772 | if (rn->info) { | |
773 | vnc_zebra_route_msg(&rn->p, | |
774 | nexthop_count, | |
775 | nhp_ary, add); | |
776 | } | |
777 | } | |
778 | } | |
779 | if (nhp_ary) | |
780 | XFREE(MTYPE_TMP, nhp_ary); | |
781 | if (nh_ary) | |
782 | XFREE(MTYPE_TMP, nh_ary); | |
783 | } | |
65efcfce LB |
784 | } |
785 | ||
d62a17ae | 786 | void vnc_zebra_add_group(struct bgp *bgp, struct rfapi_nve_group_cfg *rfg) |
65efcfce | 787 | { |
d62a17ae | 788 | vnc_zebra_add_del_group_afi(bgp, rfg, AFI_IP, 1); |
789 | vnc_zebra_add_del_group_afi(bgp, rfg, AFI_IP6, 1); | |
65efcfce LB |
790 | } |
791 | ||
d62a17ae | 792 | void vnc_zebra_del_group(struct bgp *bgp, struct rfapi_nve_group_cfg *rfg) |
65efcfce | 793 | { |
d62a17ae | 794 | vnc_zlog_debug_verbose("%s: entry", __func__); |
795 | vnc_zebra_add_del_group_afi(bgp, rfg, AFI_IP, 0); | |
796 | vnc_zebra_add_del_group_afi(bgp, rfg, AFI_IP6, 0); | |
65efcfce LB |
797 | } |
798 | ||
d62a17ae | 799 | void vnc_zebra_reexport_group_afi(struct bgp *bgp, |
800 | struct rfapi_nve_group_cfg *rfg, afi_t afi) | |
65efcfce | 801 | { |
d62a17ae | 802 | struct listnode *node; |
803 | struct rfapi_rfg_name *rfgn; | |
804 | ||
805 | for (ALL_LIST_ELEMENTS_RO(bgp->rfapi_cfg->rfg_export_zebra_l, node, | |
806 | rfgn)) { | |
807 | ||
808 | if (rfgn->rfg == rfg) { | |
809 | vnc_zebra_add_del_group_afi(bgp, rfg, afi, 0); | |
810 | vnc_zebra_add_del_group_afi(bgp, rfg, afi, 1); | |
811 | break; | |
812 | } | |
813 | } | |
65efcfce LB |
814 | } |
815 | ||
816 | ||
817 | /*********************************************************************** | |
818 | * CONTROL INTERFACE | |
819 | ***********************************************************************/ | |
820 | ||
821 | ||
822 | /* Other routes redistribution into BGP. */ | |
d62a17ae | 823 | int vnc_redistribute_set(struct bgp *bgp, afi_t afi, int type) |
65efcfce | 824 | { |
d62a17ae | 825 | if (!bgp->rfapi_cfg) { |
826 | return CMD_WARNING_CONFIG_FAILED; | |
827 | } | |
65efcfce | 828 | |
d62a17ae | 829 | /* Set flag to BGP instance. */ |
830 | bgp->rfapi_cfg->redist[afi][type] = 1; | |
65efcfce | 831 | |
d62a17ae | 832 | // bgp->redist[afi][type] = 1; |
65efcfce | 833 | |
d62a17ae | 834 | /* Return if already redistribute flag is set. */ |
835 | if (zclient_vnc->redist[afi][type]) | |
836 | return CMD_WARNING_CONFIG_FAILED; | |
65efcfce | 837 | |
d62a17ae | 838 | vrf_bitmap_set(zclient_vnc->redist[afi][type], VRF_DEFAULT); |
65efcfce | 839 | |
d62a17ae | 840 | // zclient_vnc->redist[afi][type] = 1; |
65efcfce | 841 | |
d62a17ae | 842 | /* Return if zebra connection is not established. */ |
843 | if (zclient_vnc->sock < 0) | |
844 | return CMD_WARNING_CONFIG_FAILED; | |
65efcfce | 845 | |
d62a17ae | 846 | if (BGP_DEBUG(zebra, ZEBRA)) |
847 | vnc_zlog_debug_verbose("Zebra send: redistribute add %s", | |
848 | zebra_route_string(type)); | |
65efcfce | 849 | |
d62a17ae | 850 | /* Send distribute add message to zebra. */ |
851 | zebra_redistribute_send(ZEBRA_REDISTRIBUTE_ADD, zclient_vnc, afi, type, | |
852 | 0, VRF_DEFAULT); | |
65efcfce | 853 | |
d62a17ae | 854 | return CMD_SUCCESS; |
65efcfce LB |
855 | } |
856 | ||
857 | /* Unset redistribution. */ | |
d62a17ae | 858 | int vnc_redistribute_unset(struct bgp *bgp, afi_t afi, int type) |
65efcfce | 859 | { |
d62a17ae | 860 | vnc_zlog_debug_verbose("%s: type=%d entry", __func__, type); |
861 | ||
862 | if (!bgp->rfapi_cfg) { | |
863 | vnc_zlog_debug_verbose("%s: return (no rfapi_cfg)", __func__); | |
864 | return CMD_WARNING_CONFIG_FAILED; | |
865 | } | |
866 | ||
867 | /* Unset flag from BGP instance. */ | |
868 | bgp->rfapi_cfg->redist[afi][type] = 0; | |
869 | ||
870 | /* Return if zebra connection is disabled. */ | |
871 | if (!zclient_vnc->redist[afi][type]) | |
872 | return CMD_WARNING_CONFIG_FAILED; | |
873 | zclient_vnc->redist[afi][type] = 0; | |
874 | ||
875 | if (bgp->rfapi_cfg->redist[AFI_IP][type] == 0 | |
876 | && bgp->rfapi_cfg->redist[AFI_IP6][type] == 0 | |
877 | && zclient_vnc->sock >= 0) { | |
878 | /* Send distribute delete message to zebra. */ | |
879 | if (BGP_DEBUG(zebra, ZEBRA)) | |
880 | vnc_zlog_debug_verbose( | |
881 | "Zebra send: redistribute delete %s", | |
882 | zebra_route_string(type)); | |
883 | zebra_redistribute_send(ZEBRA_REDISTRIBUTE_DELETE, zclient_vnc, | |
884 | afi, type, 0, VRF_DEFAULT); | |
885 | } | |
886 | ||
887 | /* Withdraw redistributed routes from current BGP's routing table. */ | |
888 | vnc_redistribute_withdraw(bgp, afi, type); | |
889 | ||
890 | vnc_zlog_debug_verbose("%s: return", __func__); | |
891 | ||
892 | return CMD_SUCCESS; | |
65efcfce LB |
893 | } |
894 | ||
342213ea | 895 | extern struct zebra_privs_t bgpd_privs; |
65efcfce LB |
896 | |
897 | /* | |
898 | * Modeled after bgp_zebra.c'bgp_zebra_init() | |
899 | * Charriere asks, "Is it possible to carry two?" | |
900 | */ | |
d62a17ae | 901 | void vnc_zebra_init(struct thread_master *master) |
65efcfce | 902 | { |
d62a17ae | 903 | /* Set default values. */ |
e1a1880d | 904 | zclient_vnc = zclient_new_notify(master, &zclient_options_default); |
342213ea | 905 | zclient_init(zclient_vnc, ZEBRA_ROUTE_VNC, 0, &bgpd_privs); |
d62a17ae | 906 | |
74489921 RW |
907 | zclient_vnc->redistribute_route_add = vnc_zebra_read_route; |
908 | zclient_vnc->redistribute_route_del = vnc_zebra_read_route; | |
65efcfce LB |
909 | } |
910 | ||
d62a17ae | 911 | void vnc_zebra_destroy(void) |
65efcfce | 912 | { |
d62a17ae | 913 | if (zclient_vnc == NULL) |
914 | return; | |
915 | zclient_stop(zclient_vnc); | |
916 | zclient_free(zclient_vnc); | |
917 | zclient_vnc = NULL; | |
65efcfce | 918 | } |