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718e3744 | 1 | /* zebra client |
896014f4 DL |
2 | * Copyright (C) 1997, 98, 99 Kunihiro Ishiguro |
3 | * | |
4 | * This file is part of GNU Zebra. | |
5 | * | |
6 | * GNU Zebra is free software; you can redistribute it and/or modify it | |
7 | * under the terms of the GNU General Public License as published by the | |
8 | * Free Software Foundation; either version 2, or (at your option) any | |
9 | * later version. | |
10 | * | |
11 | * GNU Zebra is distributed in the hope that it will be useful, but | |
12 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | * General Public License for more details. | |
15 | * | |
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 | |
19 | */ | |
718e3744 | 20 | |
21 | #include <zebra.h> | |
22 | ||
23 | #include "command.h" | |
24 | #include "stream.h" | |
25 | #include "network.h" | |
26 | #include "prefix.h" | |
27 | #include "log.h" | |
28 | #include "sockunion.h" | |
29 | #include "zclient.h" | |
30 | #include "routemap.h" | |
31 | #include "thread.h" | |
3f9c7369 | 32 | #include "queue.h" |
6e919709 | 33 | #include "memory.h" |
856ca177 | 34 | #include "lib/json.h" |
2376c3f2 | 35 | #include "lib/bfd.h" |
039f3a34 | 36 | #include "filter.h" |
cd1964ff | 37 | #include "mpls.h" |
128ea8ab | 38 | #include "vxlan.h" |
718e3744 | 39 | |
40 | #include "bgpd/bgpd.h" | |
41 | #include "bgpd/bgp_route.h" | |
42 | #include "bgpd/bgp_attr.h" | |
43 | #include "bgpd/bgp_nexthop.h" | |
44 | #include "bgpd/bgp_zebra.h" | |
45 | #include "bgpd/bgp_fsm.h" | |
a39275d7 | 46 | #include "bgpd/bgp_debug.h" |
8196f13d | 47 | #include "bgpd/bgp_mpath.h" |
fb018d25 | 48 | #include "bgpd/bgp_nexthop.h" |
ffd0c037 | 49 | #include "bgpd/bgp_nht.h" |
8c4f6381 | 50 | #include "bgpd/bgp_bfd.h" |
cd1964ff | 51 | #include "bgpd/bgp_label.h" |
65efcfce | 52 | #if ENABLE_BGP_VNC |
d62a17ae | 53 | #include "bgpd/rfapi/rfapi_backend.h" |
54 | #include "bgpd/rfapi/vnc_export_bgp.h" | |
65efcfce | 55 | #endif |
128ea8ab | 56 | #include "bgpd/bgp_evpn.h" |
6b0655a2 | 57 | |
718e3744 | 58 | /* All information about zebra. */ |
228da428 | 59 | struct zclient *zclient = NULL; |
718e3744 | 60 | |
8196f13d JB |
61 | /* Growable buffer for nexthops sent to zebra */ |
62 | struct stream *bgp_nexthop_buf = NULL; | |
431aa9f9 | 63 | struct stream *bgp_ifindices_buf = NULL; |
cd1964ff | 64 | struct stream *bgp_label_buf = NULL; |
8196f13d | 65 | |
73ac8160 DS |
66 | /* These array buffers are used in making a copy of the attributes for |
67 | route-map apply. Arrays are being used here to minimize mallocs and | |
68 | frees for the temporary copy of the attributes. | |
69 | Given the zapi api expects the nexthop buffer to contain pointer to | |
70 | pointers for nexthops, we couldnt have used a single nexthop variable | |
71 | on the stack, hence we had two options: | |
72 | 1. maintain a linked-list and free it after zapi_*_route call | |
73 | 2. use an array to avoid number of mallocs. | |
74 | Number of supported next-hops are finite, use of arrays should be ok. */ | |
5b964da3 | 75 | struct attr attr_cp[MULTIPATH_NUM]; |
37fe7731 | 76 | unsigned int attr_index = 0; |
73ac8160 DS |
77 | |
78 | /* Once per address-family initialization of the attribute array */ | |
d62a17ae | 79 | #define BGP_INFO_ATTR_BUF_INIT() \ |
80 | do { \ | |
81 | memset(attr_cp, 0, MULTIPATH_NUM * sizeof(struct attr)); \ | |
82 | attr_index = 0; \ | |
83 | } while (0) | |
84 | ||
85 | #define BGP_INFO_ATTR_BUF_COPY(info_src, info_dst) \ | |
86 | do { \ | |
87 | *info_dst = *info_src; \ | |
88 | assert(attr_index != multipath_num); \ | |
89 | bgp_attr_dup(&attr_cp[attr_index], info_src->attr); \ | |
90 | bgp_attr_deep_dup(&attr_cp[attr_index], info_src->attr); \ | |
91 | info_dst->attr = &attr_cp[attr_index]; \ | |
92 | attr_index++; \ | |
93 | } while (0) | |
94 | ||
95 | #define BGP_INFO_ATTR_BUF_FREE(info) \ | |
96 | do { \ | |
97 | bgp_attr_deep_free(info->attr); \ | |
98 | } while (0) | |
73ac8160 | 99 | |
ad4cbda1 | 100 | |
101 | /* Can we install into zebra? */ | |
d62a17ae | 102 | static inline int bgp_install_info_to_zebra(struct bgp *bgp) |
ad4cbda1 | 103 | { |
d62a17ae | 104 | if (zclient->sock <= 0) |
105 | return 0; | |
ad4cbda1 | 106 | |
d62a17ae | 107 | if (!IS_BGP_INST_KNOWN_TO_ZEBRA(bgp)) |
108 | return 0; | |
ad4cbda1 | 109 | |
d62a17ae | 110 | return 1; |
ad4cbda1 | 111 | } |
112 | ||
afbb1c59 LB |
113 | int zclient_num_connects; |
114 | ||
18a6dce6 | 115 | /* Router-id update message from zebra. */ |
d62a17ae | 116 | static int bgp_router_id_update(int command, struct zclient *zclient, |
117 | zebra_size_t length, vrf_id_t vrf_id) | |
718e3744 | 118 | { |
d62a17ae | 119 | struct prefix router_id; |
718e3744 | 120 | |
d62a17ae | 121 | zebra_router_id_update_read(zclient->ibuf, &router_id); |
a39275d7 | 122 | |
d62a17ae | 123 | if (BGP_DEBUG(zebra, ZEBRA)) { |
124 | char buf[PREFIX2STR_BUFFER]; | |
125 | prefix2str(&router_id, buf, sizeof(buf)); | |
126 | zlog_debug("Rx Router Id update VRF %u Id %s", vrf_id, buf); | |
127 | } | |
a39275d7 | 128 | |
d62a17ae | 129 | bgp_router_id_zebra_bump(vrf_id, &router_id); |
130 | return 0; | |
718e3744 | 131 | } |
132 | ||
fb018d25 | 133 | /* Nexthop update message from zebra. */ |
d62a17ae | 134 | static int bgp_read_nexthop_update(int command, struct zclient *zclient, |
135 | zebra_size_t length, vrf_id_t vrf_id) | |
fb018d25 | 136 | { |
d62a17ae | 137 | bgp_parse_nexthop_update(command, vrf_id); |
138 | return 0; | |
078430f6 DS |
139 | } |
140 | ||
d62a17ae | 141 | static int bgp_read_import_check_update(int command, struct zclient *zclient, |
142 | zebra_size_t length, vrf_id_t vrf_id) | |
078430f6 | 143 | { |
d62a17ae | 144 | bgp_parse_nexthop_update(command, vrf_id); |
145 | return 0; | |
fb018d25 DS |
146 | } |
147 | ||
4a04e5f7 | 148 | /* Set or clear interface on which unnumbered neighbor is configured. This |
149 | * would in turn cause BGP to initiate or turn off IPv6 RAs on this | |
150 | * interface. | |
151 | */ | |
d62a17ae | 152 | static void bgp_update_interface_nbrs(struct bgp *bgp, struct interface *ifp, |
153 | struct interface *upd_ifp) | |
4a04e5f7 | 154 | { |
d62a17ae | 155 | struct listnode *node, *nnode; |
156 | struct peer *peer; | |
157 | ||
158 | for (ALL_LIST_ELEMENTS(bgp->peer, node, nnode, peer)) { | |
159 | if (peer->conf_if && (strcmp(peer->conf_if, ifp->name) == 0)) { | |
160 | if (upd_ifp) { | |
161 | peer->ifp = upd_ifp; | |
162 | bgp_zebra_initiate_radv(bgp, peer); | |
163 | } else { | |
164 | bgp_zebra_terminate_radv(bgp, peer); | |
165 | peer->ifp = upd_ifp; | |
166 | } | |
167 | } | |
168 | } | |
4a04e5f7 | 169 | } |
170 | ||
d62a17ae | 171 | static int bgp_read_fec_update(int command, struct zclient *zclient, |
172 | zebra_size_t length) | |
cd1964ff | 173 | { |
d62a17ae | 174 | bgp_parse_fec_update(); |
175 | return 0; | |
cd1964ff DS |
176 | } |
177 | ||
d62a17ae | 178 | static void bgp_start_interface_nbrs(struct bgp *bgp, struct interface *ifp) |
a80beece | 179 | { |
d62a17ae | 180 | struct listnode *node, *nnode; |
181 | struct peer *peer; | |
182 | ||
183 | for (ALL_LIST_ELEMENTS(bgp->peer, node, nnode, peer)) { | |
184 | if (peer->conf_if && (strcmp(peer->conf_if, ifp->name) == 0) | |
185 | && peer->status != Established) { | |
186 | if (peer_active(peer)) | |
187 | BGP_EVENT_ADD(peer, BGP_Stop); | |
188 | BGP_EVENT_ADD(peer, BGP_Start); | |
189 | } | |
190 | } | |
a80beece DS |
191 | } |
192 | ||
d62a17ae | 193 | static void bgp_nbr_connected_add(struct bgp *bgp, struct nbr_connected *ifc) |
a197c47c | 194 | { |
d62a17ae | 195 | struct listnode *node; |
196 | struct connected *connected; | |
197 | struct interface *ifp; | |
198 | struct prefix *p; | |
199 | ||
200 | /* Kick-off the FSM for any relevant peers only if there is a | |
201 | * valid local address on the interface. | |
202 | */ | |
203 | ifp = ifc->ifp; | |
204 | for (ALL_LIST_ELEMENTS_RO(ifp->connected, node, connected)) { | |
205 | p = connected->address; | |
206 | if (p->family == AF_INET6 | |
207 | && IN6_IS_ADDR_LINKLOCAL(&p->u.prefix6)) | |
208 | break; | |
209 | } | |
210 | if (!connected) | |
211 | return; | |
212 | ||
213 | bgp_start_interface_nbrs(bgp, ifp); | |
a197c47c DS |
214 | } |
215 | ||
d62a17ae | 216 | static void bgp_nbr_connected_delete(struct bgp *bgp, struct nbr_connected *ifc, |
217 | int del) | |
a80beece | 218 | { |
d62a17ae | 219 | struct listnode *node, *nnode; |
220 | struct peer *peer; | |
221 | struct interface *ifp; | |
222 | ||
223 | for (ALL_LIST_ELEMENTS(bgp->peer, node, nnode, peer)) { | |
224 | if (peer->conf_if | |
225 | && (strcmp(peer->conf_if, ifc->ifp->name) == 0)) { | |
226 | peer->last_reset = PEER_DOWN_NBR_ADDR_DEL; | |
227 | BGP_EVENT_ADD(peer, BGP_Stop); | |
228 | } | |
229 | } | |
230 | /* Free neighbor also, if we're asked to. */ | |
231 | if (del) { | |
232 | ifp = ifc->ifp; | |
233 | listnode_delete(ifp->nbr_connected, ifc); | |
234 | nbr_connected_free(ifc); | |
235 | } | |
a80beece DS |
236 | } |
237 | ||
718e3744 | 238 | /* Inteface addition message from zebra. */ |
d62a17ae | 239 | static int bgp_interface_add(int command, struct zclient *zclient, |
240 | zebra_size_t length, vrf_id_t vrf_id) | |
718e3744 | 241 | { |
d62a17ae | 242 | struct interface *ifp; |
243 | struct bgp *bgp; | |
718e3744 | 244 | |
d62a17ae | 245 | ifp = zebra_interface_add_read(zclient->ibuf, vrf_id); |
246 | if (!ifp) // unexpected | |
247 | return 0; | |
718e3744 | 248 | |
d62a17ae | 249 | if (BGP_DEBUG(zebra, ZEBRA) && ifp) |
250 | zlog_debug("Rx Intf add VRF %u IF %s", vrf_id, ifp->name); | |
a39275d7 | 251 | |
d62a17ae | 252 | bgp = bgp_lookup_by_vrf_id(vrf_id); |
253 | if (!bgp) | |
254 | return 0; | |
4a04e5f7 | 255 | |
d62a17ae | 256 | bgp_update_interface_nbrs(bgp, ifp, ifp); |
257 | return 0; | |
718e3744 | 258 | } |
259 | ||
d62a17ae | 260 | static int bgp_interface_delete(int command, struct zclient *zclient, |
261 | zebra_size_t length, vrf_id_t vrf_id) | |
718e3744 | 262 | { |
d62a17ae | 263 | struct stream *s; |
264 | struct interface *ifp; | |
265 | struct bgp *bgp; | |
718e3744 | 266 | |
d62a17ae | 267 | s = zclient->ibuf; |
268 | ifp = zebra_interface_state_read(s, vrf_id); | |
269 | if (!ifp) /* This may happen if we've just unregistered for a VRF. */ | |
270 | return 0; | |
a4499b83 | 271 | |
d62a17ae | 272 | if (BGP_DEBUG(zebra, ZEBRA)) |
273 | zlog_debug("Rx Intf del VRF %u IF %s", vrf_id, ifp->name); | |
a39275d7 | 274 | |
d62a17ae | 275 | bgp = bgp_lookup_by_vrf_id(vrf_id); |
276 | if (!bgp) | |
277 | return 0; | |
4a04e5f7 | 278 | |
d62a17ae | 279 | bgp_update_interface_nbrs(bgp, ifp, NULL); |
64745052 DS |
280 | |
281 | ifp->ifindex = IFINDEX_DELETED; | |
d62a17ae | 282 | return 0; |
718e3744 | 283 | } |
284 | ||
d62a17ae | 285 | static int bgp_interface_up(int command, struct zclient *zclient, |
286 | zebra_size_t length, vrf_id_t vrf_id) | |
718e3744 | 287 | { |
d62a17ae | 288 | struct stream *s; |
289 | struct interface *ifp; | |
290 | struct connected *c; | |
291 | struct nbr_connected *nc; | |
292 | struct listnode *node, *nnode; | |
293 | struct bgp *bgp; | |
6aeb9e78 | 294 | |
d62a17ae | 295 | s = zclient->ibuf; |
296 | ifp = zebra_interface_state_read(s, vrf_id); | |
718e3744 | 297 | |
d62a17ae | 298 | if (!ifp) |
299 | return 0; | |
718e3744 | 300 | |
d62a17ae | 301 | if (BGP_DEBUG(zebra, ZEBRA)) |
302 | zlog_debug("Rx Intf up VRF %u IF %s", vrf_id, ifp->name); | |
ad4cbda1 | 303 | |
d62a17ae | 304 | bgp = bgp_lookup_by_vrf_id(vrf_id); |
305 | if (!bgp) | |
306 | return 0; | |
a39275d7 | 307 | |
d62a17ae | 308 | for (ALL_LIST_ELEMENTS(ifp->connected, node, nnode, c)) |
309 | bgp_connected_add(bgp, c); | |
718e3744 | 310 | |
d62a17ae | 311 | for (ALL_LIST_ELEMENTS(ifp->nbr_connected, node, nnode, nc)) |
312 | bgp_nbr_connected_add(bgp, nc); | |
a80beece | 313 | |
d62a17ae | 314 | return 0; |
718e3744 | 315 | } |
316 | ||
d62a17ae | 317 | static int bgp_interface_down(int command, struct zclient *zclient, |
318 | zebra_size_t length, vrf_id_t vrf_id) | |
718e3744 | 319 | { |
d62a17ae | 320 | struct stream *s; |
321 | struct interface *ifp; | |
322 | struct connected *c; | |
323 | struct nbr_connected *nc; | |
324 | struct listnode *node, *nnode; | |
325 | struct bgp *bgp; | |
6aeb9e78 | 326 | |
d62a17ae | 327 | s = zclient->ibuf; |
328 | ifp = zebra_interface_state_read(s, vrf_id); | |
329 | if (!ifp) | |
330 | return 0; | |
718e3744 | 331 | |
d62a17ae | 332 | if (BGP_DEBUG(zebra, ZEBRA)) |
333 | zlog_debug("Rx Intf down VRF %u IF %s", vrf_id, ifp->name); | |
ad4cbda1 | 334 | |
d62a17ae | 335 | bgp = bgp_lookup_by_vrf_id(vrf_id); |
336 | if (!bgp) | |
337 | return 0; | |
a39275d7 | 338 | |
d62a17ae | 339 | for (ALL_LIST_ELEMENTS(ifp->connected, node, nnode, c)) |
340 | bgp_connected_delete(bgp, c); | |
718e3744 | 341 | |
d62a17ae | 342 | for (ALL_LIST_ELEMENTS(ifp->nbr_connected, node, nnode, nc)) |
343 | bgp_nbr_connected_delete(bgp, nc, 1); | |
a80beece | 344 | |
d62a17ae | 345 | /* Fast external-failover */ |
346 | { | |
347 | struct peer *peer; | |
718e3744 | 348 | |
d62a17ae | 349 | if (CHECK_FLAG(bgp->flags, BGP_FLAG_NO_FAST_EXT_FAILOVER)) |
350 | return 0; | |
718e3744 | 351 | |
d62a17ae | 352 | for (ALL_LIST_ELEMENTS(bgp->peer, node, nnode, peer)) { |
8c4f6381 | 353 | #if defined(HAVE_CUMULUS) |
d62a17ae | 354 | /* Take down directly connected EBGP peers as well as |
355 | * 1-hop BFD | |
356 | * tracked (directly connected) IBGP peers. | |
357 | */ | |
358 | if ((peer->ttl != 1) && (peer->gtsm_hops != 1) | |
359 | && (!peer->bfd_info | |
360 | || bgp_bfd_is_peer_multihop(peer))) | |
8c4f6381 | 361 | #else |
d62a17ae | 362 | /* Take down directly connected EBGP peers */ |
363 | if ((peer->ttl != 1) && (peer->gtsm_hops != 1)) | |
8c4f6381 | 364 | #endif |
d62a17ae | 365 | continue; |
718e3744 | 366 | |
d62a17ae | 367 | if (ifp == peer->nexthop.ifp) { |
368 | BGP_EVENT_ADD(peer, BGP_Stop); | |
369 | peer->last_reset = PEER_DOWN_IF_DOWN; | |
370 | } | |
371 | } | |
372 | } | |
718e3744 | 373 | |
d62a17ae | 374 | return 0; |
718e3744 | 375 | } |
376 | ||
d62a17ae | 377 | static int bgp_interface_address_add(int command, struct zclient *zclient, |
378 | zebra_size_t length, vrf_id_t vrf_id) | |
718e3744 | 379 | { |
d62a17ae | 380 | struct connected *ifc; |
381 | ||
382 | ifc = zebra_interface_address_read(command, zclient->ibuf, vrf_id); | |
383 | ||
384 | if (ifc == NULL) | |
385 | return 0; | |
386 | ||
387 | if (bgp_debug_zebra(ifc->address)) { | |
388 | char buf[PREFIX2STR_BUFFER]; | |
389 | prefix2str(ifc->address, buf, sizeof(buf)); | |
390 | zlog_debug("Rx Intf address add VRF %u IF %s addr %s", vrf_id, | |
391 | ifc->ifp->name, buf); | |
392 | } | |
393 | ||
394 | if (if_is_operative(ifc->ifp)) { | |
395 | struct bgp *bgp; | |
396 | ||
397 | bgp = bgp_lookup_by_vrf_id(vrf_id); | |
398 | if (!bgp) | |
399 | return 0; | |
400 | ||
401 | bgp_connected_add(bgp, ifc); | |
402 | /* If we have learnt of any neighbors on this interface, | |
403 | * check to kick off any BGP interface-based neighbors, | |
404 | * but only if this is a link-local address. | |
405 | */ | |
406 | if (IN6_IS_ADDR_LINKLOCAL(&ifc->address->u.prefix6) | |
407 | && !list_isempty(ifc->ifp->nbr_connected)) | |
408 | bgp_start_interface_nbrs(bgp, ifc->ifp); | |
409 | } | |
410 | ||
411 | return 0; | |
718e3744 | 412 | } |
413 | ||
d62a17ae | 414 | static int bgp_interface_address_delete(int command, struct zclient *zclient, |
415 | zebra_size_t length, vrf_id_t vrf_id) | |
718e3744 | 416 | { |
d62a17ae | 417 | struct connected *ifc; |
418 | struct bgp *bgp; | |
6aeb9e78 | 419 | |
d62a17ae | 420 | ifc = zebra_interface_address_read(command, zclient->ibuf, vrf_id); |
718e3744 | 421 | |
d62a17ae | 422 | if (ifc == NULL) |
423 | return 0; | |
718e3744 | 424 | |
d62a17ae | 425 | if (bgp_debug_zebra(ifc->address)) { |
426 | char buf[PREFIX2STR_BUFFER]; | |
427 | prefix2str(ifc->address, buf, sizeof(buf)); | |
428 | zlog_debug("Rx Intf address del VRF %u IF %s addr %s", vrf_id, | |
429 | ifc->ifp->name, buf); | |
430 | } | |
a39275d7 | 431 | |
d62a17ae | 432 | if (if_is_operative(ifc->ifp)) { |
433 | bgp = bgp_lookup_by_vrf_id(vrf_id); | |
434 | if (bgp) | |
435 | bgp_connected_delete(bgp, ifc); | |
436 | } | |
718e3744 | 437 | |
d62a17ae | 438 | connected_free(ifc); |
718e3744 | 439 | |
d62a17ae | 440 | return 0; |
718e3744 | 441 | } |
442 | ||
d62a17ae | 443 | static int bgp_interface_nbr_address_add(int command, struct zclient *zclient, |
444 | zebra_size_t length, vrf_id_t vrf_id) | |
a80beece | 445 | { |
d62a17ae | 446 | struct nbr_connected *ifc = NULL; |
447 | struct bgp *bgp; | |
448 | ||
449 | ifc = zebra_interface_nbr_address_read(command, zclient->ibuf, vrf_id); | |
450 | ||
451 | if (ifc == NULL) | |
452 | return 0; | |
453 | ||
454 | if (bgp_debug_zebra(ifc->address)) { | |
455 | char buf[PREFIX2STR_BUFFER]; | |
456 | prefix2str(ifc->address, buf, sizeof(buf)); | |
457 | zlog_debug("Rx Intf neighbor add VRF %u IF %s addr %s", vrf_id, | |
458 | ifc->ifp->name, buf); | |
459 | } | |
460 | ||
461 | if (if_is_operative(ifc->ifp)) { | |
462 | bgp = bgp_lookup_by_vrf_id(vrf_id); | |
463 | if (bgp) | |
464 | bgp_nbr_connected_add(bgp, ifc); | |
465 | } | |
466 | ||
467 | return 0; | |
a80beece DS |
468 | } |
469 | ||
d62a17ae | 470 | static int bgp_interface_nbr_address_delete(int command, |
471 | struct zclient *zclient, | |
472 | zebra_size_t length, | |
473 | vrf_id_t vrf_id) | |
a80beece | 474 | { |
d62a17ae | 475 | struct nbr_connected *ifc = NULL; |
476 | struct bgp *bgp; | |
6aeb9e78 | 477 | |
d62a17ae | 478 | ifc = zebra_interface_nbr_address_read(command, zclient->ibuf, vrf_id); |
a80beece | 479 | |
d62a17ae | 480 | if (ifc == NULL) |
481 | return 0; | |
a80beece | 482 | |
d62a17ae | 483 | if (bgp_debug_zebra(ifc->address)) { |
484 | char buf[PREFIX2STR_BUFFER]; | |
485 | prefix2str(ifc->address, buf, sizeof(buf)); | |
486 | zlog_debug("Rx Intf neighbor del VRF %u IF %s addr %s", vrf_id, | |
487 | ifc->ifp->name, buf); | |
488 | } | |
a80beece | 489 | |
d62a17ae | 490 | if (if_is_operative(ifc->ifp)) { |
491 | bgp = bgp_lookup_by_vrf_id(vrf_id); | |
492 | if (bgp) | |
493 | bgp_nbr_connected_delete(bgp, ifc, 0); | |
494 | } | |
a80beece | 495 | |
d62a17ae | 496 | nbr_connected_free(ifc); |
a80beece | 497 | |
d62a17ae | 498 | return 0; |
a80beece DS |
499 | } |
500 | ||
bfcd43b2 | 501 | /* VRF update for an interface. */ |
d62a17ae | 502 | static int bgp_interface_vrf_update(int command, struct zclient *zclient, |
503 | zebra_size_t length, vrf_id_t vrf_id) | |
bfcd43b2 | 504 | { |
d62a17ae | 505 | struct interface *ifp; |
506 | vrf_id_t new_vrf_id; | |
507 | struct connected *c; | |
508 | struct nbr_connected *nc; | |
509 | struct listnode *node, *nnode; | |
510 | struct bgp *bgp; | |
bfcd43b2 | 511 | |
d62a17ae | 512 | ifp = zebra_interface_vrf_update_read(zclient->ibuf, vrf_id, |
513 | &new_vrf_id); | |
514 | if (!ifp) | |
515 | return 0; | |
bfcd43b2 | 516 | |
d62a17ae | 517 | if (BGP_DEBUG(zebra, ZEBRA) && ifp) |
518 | zlog_debug("Rx Intf VRF change VRF %u IF %s NewVRF %u", vrf_id, | |
519 | ifp->name, new_vrf_id); | |
bfcd43b2 | 520 | |
d62a17ae | 521 | bgp = bgp_lookup_by_vrf_id(vrf_id); |
522 | if (!bgp) | |
523 | return 0; | |
bfcd43b2 | 524 | |
d62a17ae | 525 | for (ALL_LIST_ELEMENTS(ifp->connected, node, nnode, c)) |
526 | bgp_connected_delete(bgp, c); | |
bfcd43b2 | 527 | |
d62a17ae | 528 | for (ALL_LIST_ELEMENTS(ifp->nbr_connected, node, nnode, nc)) |
529 | bgp_nbr_connected_delete(bgp, nc, 1); | |
bfcd43b2 | 530 | |
d62a17ae | 531 | /* Fast external-failover */ |
532 | { | |
533 | struct peer *peer; | |
bfcd43b2 | 534 | |
d62a17ae | 535 | if (CHECK_FLAG(bgp->flags, BGP_FLAG_NO_FAST_EXT_FAILOVER)) |
536 | return 0; | |
bfcd43b2 | 537 | |
d62a17ae | 538 | for (ALL_LIST_ELEMENTS(bgp->peer, node, nnode, peer)) { |
539 | if ((peer->ttl != 1) && (peer->gtsm_hops != 1)) | |
540 | continue; | |
bfcd43b2 | 541 | |
d62a17ae | 542 | if (ifp == peer->nexthop.ifp) |
543 | BGP_EVENT_ADD(peer, BGP_Stop); | |
544 | } | |
545 | } | |
bfcd43b2 | 546 | |
d62a17ae | 547 | if_update_to_new_vrf(ifp, new_vrf_id); |
bfcd43b2 | 548 | |
d62a17ae | 549 | bgp = bgp_lookup_by_vrf_id(new_vrf_id); |
550 | if (!bgp) | |
551 | return 0; | |
bfcd43b2 | 552 | |
d62a17ae | 553 | for (ALL_LIST_ELEMENTS(ifp->connected, node, nnode, c)) |
554 | bgp_connected_add(bgp, c); | |
bfcd43b2 | 555 | |
d62a17ae | 556 | for (ALL_LIST_ELEMENTS(ifp->nbr_connected, node, nnode, nc)) |
557 | bgp_nbr_connected_add(bgp, nc); | |
558 | return 0; | |
bfcd43b2 | 559 | } |
560 | ||
718e3744 | 561 | /* Zebra route add and delete treatment. */ |
d62a17ae | 562 | static int zebra_read_ipv4(int command, struct zclient *zclient, |
563 | zebra_size_t length, vrf_id_t vrf_id) | |
718e3744 | 564 | { |
d62a17ae | 565 | struct stream *s; |
566 | struct zapi_ipv4 api; | |
567 | struct in_addr nexthop; | |
568 | struct prefix_ipv4 p; | |
569 | unsigned int ifindex; | |
570 | int i; | |
571 | struct bgp *bgp; | |
572 | ||
573 | bgp = bgp_lookup_by_vrf_id(vrf_id); | |
574 | if (!bgp) | |
575 | return 0; | |
576 | ||
577 | s = zclient->ibuf; | |
578 | nexthop.s_addr = 0; | |
579 | ||
580 | /* Type, flags, message. */ | |
581 | api.type = stream_getc(s); | |
582 | api.instance = stream_getw(s); | |
583 | api.flags = stream_getl(s); | |
584 | api.message = stream_getc(s); | |
585 | ||
586 | /* IPv4 prefix. */ | |
587 | memset(&p, 0, sizeof(struct prefix_ipv4)); | |
588 | p.family = AF_INET; | |
589 | p.prefixlen = MIN(IPV4_MAX_PREFIXLEN, stream_getc(s)); | |
590 | stream_get(&p.prefix, s, PSIZE(p.prefixlen)); | |
591 | ||
592 | /* Nexthop, ifindex, distance, metric. */ | |
593 | if (CHECK_FLAG(api.message, ZAPI_MESSAGE_NEXTHOP)) { | |
594 | api.nexthop_num = stream_getc(s); | |
595 | nexthop.s_addr = stream_get_ipv4(s); | |
a39275d7 | 596 | } |
d289687f | 597 | |
d62a17ae | 598 | if (CHECK_FLAG(api.message, ZAPI_MESSAGE_IFINDEX)) { |
599 | api.ifindex_num = stream_getc(s); | |
600 | ifindex = stream_getl(s); /* ifindex, unused */ | |
601 | } else { | |
602 | ifindex = 0; | |
603 | } | |
604 | ||
605 | if (CHECK_FLAG(api.message, ZAPI_MESSAGE_DISTANCE)) | |
606 | api.distance = stream_getc(s); | |
607 | ||
608 | if (CHECK_FLAG(api.message, ZAPI_MESSAGE_METRIC)) | |
609 | api.metric = stream_getl(s); | |
610 | else | |
611 | api.metric = 0; | |
612 | ||
613 | if (CHECK_FLAG(api.message, ZAPI_MESSAGE_TAG)) | |
614 | api.tag = stream_getl(s); | |
615 | else | |
616 | api.tag = 0; | |
617 | ||
618 | if (command == ZEBRA_REDISTRIBUTE_IPV4_ADD) { | |
619 | if (bgp_debug_zebra((struct prefix *)&p)) { | |
620 | char buf[2][INET_ADDRSTRLEN]; | |
621 | zlog_debug( | |
622 | "Rx IPv4 route add VRF %u %s[%d] %s/%d nexthop %s metric %u tag %" ROUTE_TAG_PRI, | |
623 | vrf_id, zebra_route_string(api.type), | |
9d303b37 DL |
624 | api.instance, inet_ntop(AF_INET, &p.prefix, |
625 | buf[0], sizeof(buf[0])), | |
626 | p.prefixlen, inet_ntop(AF_INET, &nexthop, | |
627 | buf[1], sizeof(buf[1])), | |
d62a17ae | 628 | api.metric, api.tag); |
629 | } | |
630 | ||
631 | /* | |
632 | * The ADD message is actually an UPDATE and there is no | |
633 | * explicit DEL | |
634 | * for a prior redistributed route, if any. So, perform an | |
635 | * implicit | |
636 | * DEL processing for the same redistributed route from any | |
637 | * other | |
638 | * source type. | |
639 | */ | |
640 | for (i = 0; i < ZEBRA_ROUTE_MAX; i++) { | |
641 | if (i != api.type) | |
642 | bgp_redistribute_delete(bgp, | |
643 | (struct prefix *)&p, i, | |
644 | api.instance); | |
645 | } | |
646 | ||
647 | /* Now perform the add/update. */ | |
648 | bgp_redistribute_add(bgp, (struct prefix *)&p, &nexthop, NULL, | |
649 | ifindex, api.metric, api.type, | |
650 | api.instance, api.tag); | |
651 | } else if (command == ZEBRA_REDISTRIBUTE_IPV4_DEL) { | |
652 | if (bgp_debug_zebra((struct prefix *)&p)) { | |
653 | char buf[2][INET_ADDRSTRLEN]; | |
654 | zlog_debug( | |
655 | "Rx IPv4 route delete VRF %u %s[%d] %s/%d " | |
656 | "nexthop %s metric %u tag %" ROUTE_TAG_PRI, | |
657 | vrf_id, zebra_route_string(api.type), | |
9d303b37 DL |
658 | api.instance, inet_ntop(AF_INET, &p.prefix, |
659 | buf[0], sizeof(buf[0])), | |
660 | p.prefixlen, inet_ntop(AF_INET, &nexthop, | |
661 | buf[1], sizeof(buf[1])), | |
d62a17ae | 662 | api.metric, api.tag); |
663 | } | |
664 | bgp_redistribute_delete(bgp, (struct prefix *)&p, api.type, | |
665 | api.instance); | |
a39275d7 | 666 | } |
718e3744 | 667 | |
d62a17ae | 668 | return 0; |
718e3744 | 669 | } |
670 | ||
718e3744 | 671 | /* Zebra route add and delete treatment. */ |
d62a17ae | 672 | static int zebra_read_ipv6(int command, struct zclient *zclient, |
673 | zebra_size_t length, vrf_id_t vrf_id) | |
718e3744 | 674 | { |
d62a17ae | 675 | struct stream *s; |
676 | struct zapi_ipv6 api; | |
677 | struct in6_addr nexthop; | |
678 | struct prefix_ipv6 p, src_p; | |
679 | unsigned int ifindex; | |
680 | int i; | |
681 | struct bgp *bgp; | |
682 | ||
683 | bgp = bgp_lookup_by_vrf_id(vrf_id); | |
684 | if (!bgp) | |
685 | return 0; | |
686 | ||
687 | s = zclient->ibuf; | |
688 | memset(&nexthop, 0, sizeof(struct in6_addr)); | |
689 | ||
690 | /* Type, flags, message. */ | |
691 | api.type = stream_getc(s); | |
692 | api.instance = stream_getw(s); | |
693 | api.flags = stream_getl(s); | |
694 | api.message = stream_getc(s); | |
695 | ||
696 | /* IPv6 prefix. */ | |
697 | memset(&p, 0, sizeof(struct prefix_ipv6)); | |
698 | p.family = AF_INET6; | |
699 | p.prefixlen = MIN(IPV6_MAX_PREFIXLEN, stream_getc(s)); | |
700 | stream_get(&p.prefix, s, PSIZE(p.prefixlen)); | |
701 | ||
702 | memset(&src_p, 0, sizeof(struct prefix_ipv6)); | |
703 | src_p.family = AF_INET6; | |
704 | if (CHECK_FLAG(api.message, ZAPI_MESSAGE_SRCPFX)) { | |
705 | src_p.prefixlen = stream_getc(s); | |
706 | stream_get(&src_p.prefix, s, PSIZE(src_p.prefixlen)); | |
a39275d7 | 707 | } |
d289687f | 708 | |
d62a17ae | 709 | if (src_p.prefixlen) |
710 | /* we completely ignore srcdest routes for now. */ | |
711 | return 0; | |
712 | ||
713 | /* Nexthop, ifindex, distance, metric. */ | |
714 | if (CHECK_FLAG(api.message, ZAPI_MESSAGE_NEXTHOP)) { | |
715 | api.nexthop_num = stream_getc(s); | |
716 | stream_get(&nexthop, s, 16); | |
717 | } | |
718 | ||
719 | if (CHECK_FLAG(api.message, ZAPI_MESSAGE_IFINDEX)) { | |
720 | api.ifindex_num = stream_getc(s); | |
721 | ifindex = stream_getl(s); /* ifindex, unused */ | |
722 | } else { | |
723 | ifindex = 0; | |
a39275d7 | 724 | } |
d62a17ae | 725 | |
726 | if (CHECK_FLAG(api.message, ZAPI_MESSAGE_DISTANCE)) | |
727 | api.distance = stream_getc(s); | |
728 | else | |
729 | api.distance = 0; | |
730 | ||
731 | if (CHECK_FLAG(api.message, ZAPI_MESSAGE_METRIC)) | |
732 | api.metric = stream_getl(s); | |
733 | else | |
734 | api.metric = 0; | |
735 | ||
736 | if (CHECK_FLAG(api.message, ZAPI_MESSAGE_TAG)) | |
737 | api.tag = stream_getl(s); | |
738 | else | |
739 | api.tag = 0; | |
740 | ||
741 | /* Simply ignore link-local address. */ | |
742 | if (IN6_IS_ADDR_LINKLOCAL(&p.prefix)) | |
743 | return 0; | |
744 | ||
745 | if (command == ZEBRA_REDISTRIBUTE_IPV6_ADD) { | |
746 | if (bgp_debug_zebra((struct prefix *)&p)) { | |
747 | char buf[2][INET6_ADDRSTRLEN]; | |
748 | zlog_debug( | |
749 | "Rx IPv6 route add VRF %u %s[%d] %s/%d nexthop %s metric %u tag %" ROUTE_TAG_PRI, | |
750 | vrf_id, zebra_route_string(api.type), | |
9d303b37 DL |
751 | api.instance, inet_ntop(AF_INET6, &p.prefix, |
752 | buf[0], sizeof(buf[0])), | |
753 | p.prefixlen, inet_ntop(AF_INET, &nexthop, | |
754 | buf[1], sizeof(buf[1])), | |
d62a17ae | 755 | api.metric, api.tag); |
756 | } | |
757 | ||
758 | /* | |
759 | * The ADD message is actually an UPDATE and there is no | |
760 | * explicit DEL | |
761 | * for a prior redistributed route, if any. So, perform an | |
762 | * implicit | |
763 | * DEL processing for the same redistributed route from any | |
764 | * other | |
765 | * source type. | |
766 | */ | |
767 | for (i = 0; i < ZEBRA_ROUTE_MAX; i++) { | |
768 | if (i != api.type) | |
769 | bgp_redistribute_delete(bgp, | |
770 | (struct prefix *)&p, i, | |
771 | api.instance); | |
772 | } | |
773 | ||
774 | bgp_redistribute_add(bgp, (struct prefix *)&p, NULL, &nexthop, | |
775 | ifindex, api.metric, api.type, | |
776 | api.instance, api.tag); | |
777 | } else if (command == ZEBRA_REDISTRIBUTE_IPV6_DEL) { | |
778 | if (bgp_debug_zebra((struct prefix *)&p)) { | |
779 | char buf[2][INET6_ADDRSTRLEN]; | |
780 | zlog_debug( | |
781 | "Rx IPv6 route delete VRF %u %s[%d] %s/%d " | |
782 | "nexthop %s metric %u tag %" ROUTE_TAG_PRI, | |
783 | vrf_id, zebra_route_string(api.type), | |
9d303b37 DL |
784 | api.instance, inet_ntop(AF_INET6, &p.prefix, |
785 | buf[0], sizeof(buf[0])), | |
786 | p.prefixlen, inet_ntop(AF_INET6, &nexthop, | |
787 | buf[1], sizeof(buf[1])), | |
d62a17ae | 788 | api.metric, api.tag); |
789 | } | |
790 | bgp_redistribute_delete(bgp, (struct prefix *)&p, api.type, | |
791 | api.instance); | |
792 | } | |
793 | ||
794 | return 0; | |
718e3744 | 795 | } |
6b0655a2 | 796 | |
d62a17ae | 797 | struct interface *if_lookup_by_ipv4(struct in_addr *addr, vrf_id_t vrf_id) |
718e3744 | 798 | { |
d62a17ae | 799 | struct listnode *ifnode; |
800 | struct listnode *cnode; | |
801 | struct interface *ifp; | |
802 | struct connected *connected; | |
803 | struct prefix_ipv4 p; | |
804 | struct prefix *cp; | |
805 | ||
806 | p.family = AF_INET; | |
807 | p.prefix = *addr; | |
808 | p.prefixlen = IPV4_MAX_BITLEN; | |
809 | ||
810 | for (ALL_LIST_ELEMENTS_RO(vrf_iflist(vrf_id), ifnode, ifp)) { | |
811 | for (ALL_LIST_ELEMENTS_RO(ifp->connected, cnode, connected)) { | |
812 | cp = connected->address; | |
813 | ||
814 | if (cp->family == AF_INET) | |
815 | if (prefix_match(cp, (struct prefix *)&p)) | |
816 | return ifp; | |
817 | } | |
718e3744 | 818 | } |
d62a17ae | 819 | return NULL; |
718e3744 | 820 | } |
821 | ||
d62a17ae | 822 | struct interface *if_lookup_by_ipv4_exact(struct in_addr *addr, vrf_id_t vrf_id) |
718e3744 | 823 | { |
d62a17ae | 824 | struct listnode *ifnode; |
825 | struct listnode *cnode; | |
826 | struct interface *ifp; | |
827 | struct connected *connected; | |
828 | struct prefix *cp; | |
829 | ||
830 | for (ALL_LIST_ELEMENTS_RO(vrf_iflist(vrf_id), ifnode, ifp)) { | |
831 | for (ALL_LIST_ELEMENTS_RO(ifp->connected, cnode, connected)) { | |
832 | cp = connected->address; | |
833 | ||
834 | if (cp->family == AF_INET) | |
835 | if (IPV4_ADDR_SAME(&cp->u.prefix4, addr)) | |
836 | return ifp; | |
837 | } | |
718e3744 | 838 | } |
d62a17ae | 839 | return NULL; |
718e3744 | 840 | } |
841 | ||
d62a17ae | 842 | struct interface *if_lookup_by_ipv6(struct in6_addr *addr, ifindex_t ifindex, |
843 | vrf_id_t vrf_id) | |
718e3744 | 844 | { |
d62a17ae | 845 | struct listnode *ifnode; |
846 | struct listnode *cnode; | |
847 | struct interface *ifp; | |
848 | struct connected *connected; | |
849 | struct prefix_ipv6 p; | |
850 | struct prefix *cp; | |
851 | ||
852 | p.family = AF_INET6; | |
853 | p.prefix = *addr; | |
854 | p.prefixlen = IPV6_MAX_BITLEN; | |
855 | ||
856 | for (ALL_LIST_ELEMENTS_RO(vrf_iflist(vrf_id), ifnode, ifp)) { | |
857 | for (ALL_LIST_ELEMENTS_RO(ifp->connected, cnode, connected)) { | |
858 | cp = connected->address; | |
859 | ||
860 | if (cp->family == AF_INET6) | |
861 | if (prefix_match(cp, (struct prefix *)&p)) { | |
862 | if (IN6_IS_ADDR_LINKLOCAL( | |
863 | &cp->u.prefix6)) { | |
864 | if (ifindex == ifp->ifindex) | |
865 | return ifp; | |
866 | } else | |
867 | return ifp; | |
868 | } | |
869 | } | |
718e3744 | 870 | } |
d62a17ae | 871 | return NULL; |
718e3744 | 872 | } |
873 | ||
d62a17ae | 874 | struct interface *if_lookup_by_ipv6_exact(struct in6_addr *addr, |
875 | ifindex_t ifindex, vrf_id_t vrf_id) | |
718e3744 | 876 | { |
d62a17ae | 877 | struct listnode *ifnode; |
878 | struct listnode *cnode; | |
879 | struct interface *ifp; | |
880 | struct connected *connected; | |
881 | struct prefix *cp; | |
882 | ||
883 | for (ALL_LIST_ELEMENTS_RO(vrf_iflist(vrf_id), ifnode, ifp)) { | |
884 | for (ALL_LIST_ELEMENTS_RO(ifp->connected, cnode, connected)) { | |
885 | cp = connected->address; | |
886 | ||
887 | if (cp->family == AF_INET6) | |
888 | if (IPV6_ADDR_SAME(&cp->u.prefix6, addr)) { | |
889 | if (IN6_IS_ADDR_LINKLOCAL( | |
890 | &cp->u.prefix6)) { | |
891 | if (ifindex == ifp->ifindex) | |
892 | return ifp; | |
893 | } else | |
894 | return ifp; | |
895 | } | |
896 | } | |
718e3744 | 897 | } |
d62a17ae | 898 | return NULL; |
718e3744 | 899 | } |
900 | ||
d62a17ae | 901 | static int if_get_ipv6_global(struct interface *ifp, struct in6_addr *addr) |
718e3744 | 902 | { |
d62a17ae | 903 | struct listnode *cnode; |
904 | struct connected *connected; | |
905 | struct prefix *cp; | |
906 | ||
907 | for (ALL_LIST_ELEMENTS_RO(ifp->connected, cnode, connected)) { | |
908 | cp = connected->address; | |
909 | ||
910 | if (cp->family == AF_INET6) | |
911 | if (!IN6_IS_ADDR_LINKLOCAL(&cp->u.prefix6)) { | |
912 | memcpy(addr, &cp->u.prefix6, IPV6_MAX_BYTELEN); | |
913 | return 1; | |
914 | } | |
915 | } | |
916 | return 0; | |
718e3744 | 917 | } |
918 | ||
d62a17ae | 919 | static int if_get_ipv6_local(struct interface *ifp, struct in6_addr *addr) |
718e3744 | 920 | { |
d62a17ae | 921 | struct listnode *cnode; |
922 | struct connected *connected; | |
923 | struct prefix *cp; | |
924 | ||
925 | for (ALL_LIST_ELEMENTS_RO(ifp->connected, cnode, connected)) { | |
926 | cp = connected->address; | |
927 | ||
928 | if (cp->family == AF_INET6) | |
929 | if (IN6_IS_ADDR_LINKLOCAL(&cp->u.prefix6)) { | |
930 | memcpy(addr, &cp->u.prefix6, IPV6_MAX_BYTELEN); | |
931 | return 1; | |
932 | } | |
933 | } | |
934 | return 0; | |
718e3744 | 935 | } |
718e3744 | 936 | |
d62a17ae | 937 | static int if_get_ipv4_address(struct interface *ifp, struct in_addr *addr) |
6ee06fa9 | 938 | { |
d62a17ae | 939 | struct listnode *cnode; |
940 | struct connected *connected; | |
941 | struct prefix *cp; | |
942 | ||
943 | for (ALL_LIST_ELEMENTS_RO(ifp->connected, cnode, connected)) { | |
944 | cp = connected->address; | |
945 | if ((cp->family == AF_INET) | |
946 | && !ipv4_martian(&(cp->u.prefix4))) { | |
947 | *addr = cp->u.prefix4; | |
948 | return 1; | |
949 | } | |
950 | } | |
951 | return 0; | |
6ee06fa9 PM |
952 | } |
953 | ||
d62a17ae | 954 | int bgp_nexthop_set(union sockunion *local, union sockunion *remote, |
955 | struct bgp_nexthop *nexthop, struct peer *peer) | |
718e3744 | 956 | { |
d62a17ae | 957 | int ret = 0; |
958 | struct interface *ifp = NULL; | |
959 | ||
960 | memset(nexthop, 0, sizeof(struct bgp_nexthop)); | |
961 | ||
962 | if (!local) | |
963 | return -1; | |
964 | if (!remote) | |
965 | return -1; | |
966 | ||
967 | if (local->sa.sa_family == AF_INET) { | |
968 | nexthop->v4 = local->sin.sin_addr; | |
969 | if (peer->update_if) | |
970 | ifp = if_lookup_by_name(peer->update_if, | |
971 | peer->bgp->vrf_id); | |
972 | else | |
973 | ifp = if_lookup_by_ipv4_exact(&local->sin.sin_addr, | |
974 | peer->bgp->vrf_id); | |
718e3744 | 975 | } |
d62a17ae | 976 | if (local->sa.sa_family == AF_INET6) { |
977 | if (IN6_IS_ADDR_LINKLOCAL(&local->sin6.sin6_addr)) { | |
978 | if (peer->conf_if || peer->ifname) | |
979 | ifp = if_lookup_by_name(peer->conf_if | |
980 | ? peer->conf_if | |
981 | : peer->ifname, | |
982 | peer->bgp->vrf_id); | |
983 | } else if (peer->update_if) | |
984 | ifp = if_lookup_by_name(peer->update_if, | |
985 | peer->bgp->vrf_id); | |
986 | else | |
987 | ifp = if_lookup_by_ipv6_exact(&local->sin6.sin6_addr, | |
988 | local->sin6.sin6_scope_id, | |
989 | peer->bgp->vrf_id); | |
718e3744 | 990 | } |
d62a17ae | 991 | |
992 | if (!ifp) | |
993 | return -1; | |
994 | ||
995 | nexthop->ifp = ifp; | |
996 | ||
997 | /* IPv4 connection, fetch and store IPv6 local address(es) if any. */ | |
998 | if (local->sa.sa_family == AF_INET) { | |
999 | /* IPv6 nexthop*/ | |
1000 | ret = if_get_ipv6_global(ifp, &nexthop->v6_global); | |
1001 | ||
1002 | if (!ret) { | |
1003 | /* There is no global nexthop. Use link-local address as | |
1004 | * both the | |
1005 | * global and link-local nexthop. In this scenario, the | |
1006 | * expectation | |
1007 | * for interop is that the network admin would use a | |
1008 | * route-map to | |
1009 | * specify the global IPv6 nexthop. | |
1010 | */ | |
1011 | if_get_ipv6_local(ifp, &nexthop->v6_global); | |
1012 | memcpy(&nexthop->v6_local, &nexthop->v6_global, | |
1013 | IPV6_MAX_BYTELEN); | |
1014 | } else | |
1015 | if_get_ipv6_local(ifp, &nexthop->v6_local); | |
1016 | ||
1017 | if (if_lookup_by_ipv4(&remote->sin.sin_addr, peer->bgp->vrf_id)) | |
1018 | peer->shared_network = 1; | |
1019 | else | |
1020 | peer->shared_network = 0; | |
718e3744 | 1021 | } |
718e3744 | 1022 | |
d62a17ae | 1023 | /* IPv6 connection, fetch and store IPv4 local address if any. */ |
1024 | if (local->sa.sa_family == AF_INET6) { | |
1025 | struct interface *direct = NULL; | |
1026 | ||
1027 | /* IPv4 nexthop. */ | |
1028 | ret = if_get_ipv4_address(ifp, &nexthop->v4); | |
1029 | if (!ret && peer->local_id.s_addr) | |
1030 | nexthop->v4 = peer->local_id; | |
1031 | ||
1032 | /* Global address*/ | |
1033 | if (!IN6_IS_ADDR_LINKLOCAL(&local->sin6.sin6_addr)) { | |
1034 | memcpy(&nexthop->v6_global, &local->sin6.sin6_addr, | |
1035 | IPV6_MAX_BYTELEN); | |
1036 | ||
1037 | /* If directory connected set link-local address. */ | |
1038 | direct = if_lookup_by_ipv6(&remote->sin6.sin6_addr, | |
1039 | remote->sin6.sin6_scope_id, | |
1040 | peer->bgp->vrf_id); | |
1041 | if (direct) | |
1042 | if_get_ipv6_local(ifp, &nexthop->v6_local); | |
1043 | } else | |
1044 | /* Link-local address. */ | |
1045 | { | |
1046 | ret = if_get_ipv6_global(ifp, &nexthop->v6_global); | |
1047 | ||
1048 | /* If there is no global address. Set link-local | |
1049 | address as | |
1050 | global. I know this break RFC specification... */ | |
1051 | /* In this scenario, the expectation for interop is that | |
1052 | * the | |
1053 | * network admin would use a route-map to specify the | |
1054 | * global | |
1055 | * IPv6 nexthop. | |
1056 | */ | |
1057 | if (!ret) | |
1058 | memcpy(&nexthop->v6_global, | |
1059 | &local->sin6.sin6_addr, | |
1060 | IPV6_MAX_BYTELEN); | |
1061 | /* Always set the link-local address */ | |
1062 | memcpy(&nexthop->v6_local, &local->sin6.sin6_addr, | |
1063 | IPV6_MAX_BYTELEN); | |
1064 | } | |
1065 | ||
1066 | if (IN6_IS_ADDR_LINKLOCAL(&local->sin6.sin6_addr) | |
1067 | || if_lookup_by_ipv6(&remote->sin6.sin6_addr, | |
1068 | remote->sin6.sin6_scope_id, | |
1069 | peer->bgp->vrf_id)) | |
1070 | peer->shared_network = 1; | |
1071 | else | |
1072 | peer->shared_network = 0; | |
1073 | } | |
718e3744 | 1074 | |
d62a17ae | 1075 | /* KAME stack specific treatment. */ |
718e3744 | 1076 | #ifdef KAME |
d62a17ae | 1077 | if (IN6_IS_ADDR_LINKLOCAL(&nexthop->v6_global) |
1078 | && IN6_LINKLOCAL_IFINDEX(nexthop->v6_global)) { | |
1079 | SET_IN6_LINKLOCAL_IFINDEX(nexthop->v6_global, 0); | |
1080 | } | |
1081 | if (IN6_IS_ADDR_LINKLOCAL(&nexthop->v6_local) | |
1082 | && IN6_LINKLOCAL_IFINDEX(nexthop->v6_local)) { | |
1083 | SET_IN6_LINKLOCAL_IFINDEX(nexthop->v6_local, 0); | |
1084 | } | |
718e3744 | 1085 | #endif /* KAME */ |
e33a4880 | 1086 | |
d62a17ae | 1087 | /* If we have identified the local interface, there is no error for now. |
1088 | */ | |
1089 | return 0; | |
718e3744 | 1090 | } |
1091 | ||
d62a17ae | 1092 | static struct in6_addr *bgp_info_to_ipv6_nexthop(struct bgp_info *info) |
73ac8160 | 1093 | { |
d62a17ae | 1094 | struct in6_addr *nexthop = NULL; |
1095 | ||
1096 | /* Only global address nexthop exists. */ | |
1097 | if (info->attr->mp_nexthop_len == BGP_ATTR_NHLEN_IPV6_GLOBAL) | |
1098 | nexthop = &info->attr->mp_nexthop_global; | |
1099 | ||
1100 | /* If both global and link-local address present. */ | |
1101 | if (info->attr->mp_nexthop_len == BGP_ATTR_NHLEN_IPV6_GLOBAL_AND_LL) { | |
1102 | /* Check if route-map is set to prefer global over link-local */ | |
1103 | if (info->attr->mp_nexthop_prefer_global) | |
1104 | nexthop = &info->attr->mp_nexthop_global; | |
1105 | else { | |
1106 | /* Workaround for Cisco's nexthop bug. */ | |
1107 | if (IN6_IS_ADDR_UNSPECIFIED( | |
1108 | &info->attr->mp_nexthop_global) | |
1109 | && info->peer->su_remote->sa.sa_family == AF_INET6) | |
1110 | nexthop = | |
1111 | &info->peer->su_remote->sin6.sin6_addr; | |
1112 | else | |
1113 | nexthop = &info->attr->mp_nexthop_local; | |
1114 | } | |
1115 | } | |
1116 | ||
1117 | return nexthop; | |
73ac8160 DS |
1118 | } |
1119 | ||
d62a17ae | 1120 | static int bgp_table_map_apply(struct route_map *map, struct prefix *p, |
1121 | struct bgp_info *info) | |
73ac8160 | 1122 | { |
d62a17ae | 1123 | if (route_map_apply(map, p, RMAP_BGP, info) != RMAP_DENYMATCH) |
1124 | return 1; | |
1125 | ||
1126 | if (bgp_debug_zebra(p)) { | |
1127 | if (p->family == AF_INET) { | |
1128 | char buf[2][INET_ADDRSTRLEN]; | |
1129 | zlog_debug( | |
1130 | "Zebra rmap deny: IPv4 route %s/%d nexthop %s", | |
1131 | inet_ntop(AF_INET, &p->u.prefix4, buf[0], | |
1132 | sizeof(buf[0])), | |
1133 | p->prefixlen, | |
1134 | inet_ntop(AF_INET, &info->attr->nexthop, buf[1], | |
1135 | sizeof(buf[1]))); | |
1136 | } | |
1137 | if (p->family == AF_INET6) { | |
1138 | char buf[2][INET6_ADDRSTRLEN]; | |
1139 | zlog_debug( | |
1140 | "Zebra rmap deny: IPv6 route %s/%d nexthop %s", | |
1141 | inet_ntop(AF_INET6, &p->u.prefix6, buf[0], | |
1142 | sizeof(buf[0])), | |
1143 | p->prefixlen, | |
1144 | inet_ntop(AF_INET6, | |
1145 | bgp_info_to_ipv6_nexthop(info), | |
1146 | buf[1], sizeof(buf[1]))); | |
1147 | } | |
1148 | } | |
1149 | return 0; | |
73ac8160 DS |
1150 | } |
1151 | ||
d62a17ae | 1152 | void bgp_zebra_announce(struct bgp_node *rn, struct prefix *p, |
1153 | struct bgp_info *info, struct bgp *bgp, afi_t afi, | |
1154 | safi_t safi) | |
718e3744 | 1155 | { |
d62a17ae | 1156 | u_int32_t flags; |
1157 | u_char distance; | |
1158 | struct peer *peer; | |
1159 | struct bgp_info *mpinfo; | |
1160 | u_int32_t metric; | |
1161 | struct bgp_info local_info; | |
1162 | struct bgp_info *info_cp = &local_info; | |
1163 | route_tag_t tag; | |
1164 | mpls_label_t label; | |
1165 | ||
1166 | /* Don't try to install if we're not connected to Zebra or Zebra doesn't | |
1167 | * know of this instance. | |
1168 | */ | |
1169 | if (!bgp_install_info_to_zebra(bgp)) | |
1170 | return; | |
1171 | ||
1172 | if ((p->family == AF_INET | |
1173 | && !vrf_bitmap_check(zclient->redist[AFI_IP][ZEBRA_ROUTE_BGP], | |
1174 | bgp->vrf_id)) | |
1175 | || (p->family == AF_INET6 | |
1176 | && !vrf_bitmap_check(zclient->redist[AFI_IP6][ZEBRA_ROUTE_BGP], | |
1177 | bgp->vrf_id))) | |
1178 | return; | |
1179 | ||
1180 | if (bgp->main_zebra_update_hold) | |
1181 | return; | |
1182 | ||
1183 | flags = 0; | |
1184 | peer = info->peer; | |
1185 | ||
1186 | tag = info->attr->tag; | |
1187 | ||
1188 | /* When we create an aggregate route we must also install a Null0 route | |
1189 | * in | |
1190 | * the RIB */ | |
1191 | if (info->sub_type == BGP_ROUTE_AGGREGATE) | |
1192 | SET_FLAG(flags, ZEBRA_FLAG_BLACKHOLE); | |
1193 | ||
1194 | if (peer->sort == BGP_PEER_IBGP || peer->sort == BGP_PEER_CONFED | |
1195 | || info->sub_type == BGP_ROUTE_AGGREGATE) { | |
1196 | SET_FLAG(flags, ZEBRA_FLAG_IBGP); | |
1197 | SET_FLAG(flags, ZEBRA_FLAG_INTERNAL); | |
718e3744 | 1198 | } |
a39275d7 | 1199 | |
d62a17ae | 1200 | if ((peer->sort == BGP_PEER_EBGP && peer->ttl != 1) |
1201 | || CHECK_FLAG(peer->flags, PEER_FLAG_DISABLE_CONNECTED_CHECK) | |
1202 | || bgp_flag_check(bgp, BGP_FLAG_DISABLE_NH_CONNECTED_CHK)) | |
1203 | ||
1204 | SET_FLAG(flags, ZEBRA_FLAG_INTERNAL); | |
1205 | ||
1206 | if (p->family == AF_INET && !BGP_ATTR_NEXTHOP_AFI_IP6(info->attr)) { | |
1207 | struct zapi_ipv4 api; | |
1208 | struct in_addr *nexthop; | |
1209 | char buf[2][INET_ADDRSTRLEN]; | |
1210 | int valid_nh_count = 0; | |
1211 | int has_valid_label = 0; | |
1212 | ||
1213 | /* resize nexthop buffer size if necessary */ | |
1214 | stream_reset(bgp_nexthop_buf); | |
1215 | nexthop = NULL; | |
1216 | ||
1217 | stream_reset(bgp_label_buf); | |
1218 | ||
1219 | if (bgp->table_map[afi][safi].name) | |
1220 | BGP_INFO_ATTR_BUF_INIT(); | |
1221 | ||
1222 | /* Metric is currently based on the best-path only */ | |
1223 | metric = info->attr->med; | |
1224 | for (mpinfo = info; mpinfo; | |
1225 | mpinfo = bgp_info_mpath_next(mpinfo)) { | |
1226 | nexthop = NULL; | |
1227 | ||
1228 | if (bgp->table_map[afi][safi].name) { | |
1229 | /* Copy info and attributes, so the route-map | |
1230 | apply doesn't modify the | |
1231 | BGP route info. */ | |
1232 | BGP_INFO_ATTR_BUF_COPY(mpinfo, info_cp); | |
1233 | if (bgp_table_map_apply( | |
1234 | bgp->table_map[afi][safi].map, p, | |
1235 | info_cp)) { | |
1236 | if (mpinfo == info) { | |
1237 | /* Metric is currently based on | |
1238 | * the best-path only */ | |
1239 | metric = info_cp->attr->med; | |
1240 | tag = info_cp->attr->tag; | |
1241 | } | |
1242 | nexthop = &info_cp->attr->nexthop; | |
1243 | } | |
1244 | BGP_INFO_ATTR_BUF_FREE(info_cp); | |
1245 | } else | |
1246 | nexthop = &mpinfo->attr->nexthop; | |
1247 | ||
1248 | if (nexthop == NULL) | |
1249 | continue; | |
1250 | ||
1251 | stream_put(bgp_nexthop_buf, &nexthop, | |
1252 | sizeof(struct in_addr *)); | |
1253 | if (mpinfo->extra | |
1254 | && bgp_is_valid_label(&mpinfo->extra->label)) { | |
1255 | has_valid_label = 1; | |
1256 | label = label_pton(&mpinfo->extra->label); | |
1257 | stream_put(bgp_label_buf, &label, | |
1258 | sizeof(mpls_label_t)); | |
1259 | } | |
1260 | valid_nh_count++; | |
1261 | } | |
1262 | ||
1263 | api.vrf_id = bgp->vrf_id; | |
1264 | api.flags = flags; | |
1265 | api.type = ZEBRA_ROUTE_BGP; | |
1266 | api.instance = 0; | |
1267 | api.message = 0; | |
1268 | api.safi = safi; | |
1269 | SET_FLAG(api.message, ZAPI_MESSAGE_NEXTHOP); | |
1270 | ||
1271 | if (has_valid_label) | |
1272 | SET_FLAG(api.message, ZAPI_MESSAGE_LABEL); | |
1273 | ||
1274 | /* Note that this currently only applies to Null0 routes for | |
1275 | * aggregates. | |
1276 | * ZEBRA_FLAG_BLACKHOLE signals zapi_ipv4_route to encode a | |
1277 | * special | |
1278 | * BLACKHOLE nexthop. We want to set api.nexthop_num to zero | |
1279 | * since we | |
1280 | * do not want to also encode the 0.0.0.0 nexthop for the | |
1281 | * aggregate route. | |
1282 | */ | |
1283 | if (CHECK_FLAG(flags, ZEBRA_FLAG_BLACKHOLE)) | |
1284 | api.nexthop_num = 0; | |
1285 | else | |
1286 | api.nexthop_num = valid_nh_count; | |
1287 | ||
1288 | api.nexthop = (struct in_addr **)STREAM_DATA(bgp_nexthop_buf); | |
1289 | if (has_valid_label) { | |
1290 | api.label_num = valid_nh_count; | |
1291 | api.label = (unsigned int *)STREAM_DATA(bgp_label_buf); | |
1292 | } else { | |
1293 | api.label_num = 0; | |
1294 | api.label = NULL; | |
1295 | } | |
1296 | api.ifindex_num = 0; | |
1297 | SET_FLAG(api.message, ZAPI_MESSAGE_METRIC); | |
1298 | api.metric = metric; | |
1299 | api.tag = 0; | |
1300 | ||
1301 | if (tag) { | |
1302 | SET_FLAG(api.message, ZAPI_MESSAGE_TAG); | |
1303 | api.tag = tag; | |
1304 | } | |
1305 | ||
1306 | distance = bgp_distance_apply(p, info, afi, safi, bgp); | |
1307 | if (distance) { | |
1308 | SET_FLAG(api.message, ZAPI_MESSAGE_DISTANCE); | |
1309 | api.distance = distance; | |
1310 | } | |
1311 | ||
1312 | if (bgp_debug_zebra(p)) { | |
1313 | int i; | |
1314 | char label_buf[20]; | |
1315 | zlog_debug( | |
1316 | "Tx IPv4 route %s VRF %u %s/%d metric %u tag %" ROUTE_TAG_PRI | |
1317 | " count %d", | |
1318 | (valid_nh_count ? "add" : "delete"), | |
9d303b37 DL |
1319 | bgp->vrf_id, inet_ntop(AF_INET, &p->u.prefix4, |
1320 | buf[0], sizeof(buf[0])), | |
d62a17ae | 1321 | p->prefixlen, api.metric, api.tag, |
1322 | api.nexthop_num); | |
1323 | for (i = 0; i < api.nexthop_num; i++) { | |
1324 | label_buf[0] = '\0'; | |
1325 | if (has_valid_label) | |
1326 | sprintf(label_buf, "label %u", | |
1327 | api.label[i]); | |
1328 | zlog_debug(" nhop [%d]: %s %s", i + 1, | |
1329 | inet_ntop(AF_INET, api.nexthop[i], | |
1330 | buf[1], sizeof(buf[1])), | |
1331 | label_buf); | |
1332 | } | |
1333 | } | |
1334 | ||
1335 | zapi_ipv4_route(valid_nh_count ? ZEBRA_IPV4_ROUTE_ADD | |
1336 | : ZEBRA_IPV4_ROUTE_DELETE, | |
1337 | zclient, (struct prefix_ipv4 *)p, &api); | |
1338 | } | |
1339 | ||
1340 | /* We have to think about a IPv6 link-local address curse. */ | |
1341 | if (p->family == AF_INET6 | |
1342 | || (p->family == AF_INET && BGP_ATTR_NEXTHOP_AFI_IP6(info->attr))) { | |
1343 | ifindex_t ifindex; | |
1344 | struct in6_addr *nexthop; | |
1345 | struct zapi_ipv6 api; | |
1346 | int valid_nh_count = 0; | |
1347 | char buf[2][INET6_ADDRSTRLEN]; | |
1348 | int has_valid_label = 0; | |
1349 | ||
1350 | stream_reset(bgp_nexthop_buf); | |
1351 | stream_reset(bgp_ifindices_buf); | |
1352 | stream_reset(bgp_label_buf); | |
1353 | ||
1354 | ifindex = 0; | |
1355 | nexthop = NULL; | |
1356 | ||
1357 | if (bgp->table_map[afi][safi].name) | |
1358 | BGP_INFO_ATTR_BUF_INIT(); | |
1359 | ||
1360 | metric = info->attr->med; | |
1361 | for (mpinfo = info; mpinfo; | |
1362 | mpinfo = bgp_info_mpath_next(mpinfo)) { | |
1363 | ifindex = 0; | |
1364 | nexthop = NULL; | |
1365 | ||
1366 | if (bgp->table_map[afi][safi].name) { | |
1367 | /* Copy info and attributes, so the route-map | |
1368 | apply doesn't modify the | |
1369 | BGP route info. */ | |
1370 | BGP_INFO_ATTR_BUF_COPY(mpinfo, info_cp); | |
1371 | if (bgp_table_map_apply( | |
1372 | bgp->table_map[afi][safi].map, p, | |
1373 | info_cp)) { | |
1374 | if (mpinfo == info) { | |
1375 | metric = info_cp->attr->med; | |
1376 | tag = info_cp->attr->tag; | |
1377 | } | |
1378 | nexthop = bgp_info_to_ipv6_nexthop( | |
1379 | info_cp); | |
1380 | } | |
1381 | BGP_INFO_ATTR_BUF_FREE(info_cp); | |
1382 | } else | |
1383 | nexthop = bgp_info_to_ipv6_nexthop(mpinfo); | |
1384 | ||
1385 | if (nexthop == NULL) | |
1386 | continue; | |
1387 | ||
1388 | if ((mpinfo == info) | |
1389 | && mpinfo->attr->mp_nexthop_len | |
1390 | == BGP_ATTR_NHLEN_IPV6_GLOBAL_AND_LL) | |
1391 | if (mpinfo->peer->nexthop.ifp) | |
1392 | ifindex = mpinfo->peer->nexthop.ifp | |
1393 | ->ifindex; | |
1394 | ||
1395 | if (!ifindex) { | |
1396 | if (mpinfo->peer->conf_if | |
1397 | || mpinfo->peer->ifname) | |
1398 | ifindex = ifname2ifindex( | |
1399 | mpinfo->peer->conf_if | |
1400 | ? mpinfo->peer->conf_if | |
1401 | : mpinfo->peer->ifname, | |
1402 | bgp->vrf_id); | |
1403 | else if (mpinfo->peer->nexthop.ifp) | |
1404 | ifindex = mpinfo->peer->nexthop.ifp | |
1405 | ->ifindex; | |
1406 | } | |
1407 | if (ifindex == 0) | |
1408 | continue; | |
1409 | ||
1410 | stream_put(bgp_nexthop_buf, &nexthop, | |
1411 | sizeof(struct in6_addr *)); | |
1412 | stream_put(bgp_ifindices_buf, &ifindex, | |
1413 | sizeof(unsigned int)); | |
1414 | ||
1415 | if (mpinfo->extra | |
1416 | && bgp_is_valid_label(&mpinfo->extra->label)) { | |
1417 | has_valid_label = 1; | |
1418 | label = label_pton(&mpinfo->extra->label); | |
1419 | stream_put(bgp_label_buf, &label, | |
1420 | sizeof(mpls_label_t)); | |
1421 | } | |
1422 | valid_nh_count++; | |
1423 | } | |
1424 | ||
1425 | /* Make Zebra API structure. */ | |
1426 | api.vrf_id = bgp->vrf_id; | |
1427 | api.flags = flags; | |
1428 | api.type = ZEBRA_ROUTE_BGP; | |
1429 | api.instance = 0; | |
1430 | api.message = 0; | |
1431 | api.safi = safi; | |
1432 | SET_FLAG(api.message, ZAPI_MESSAGE_NEXTHOP); | |
1433 | ||
1434 | if (has_valid_label) | |
1435 | SET_FLAG(api.message, ZAPI_MESSAGE_LABEL); | |
1436 | ||
1437 | /* Note that this currently only applies to Null0 routes for | |
1438 | * aggregates. | |
1439 | * ZEBRA_FLAG_BLACKHOLE signals zapi_ipv6_route to encode a | |
1440 | * special | |
1441 | * BLACKHOLE nexthop. We want to set api.nexthop_num to zero | |
1442 | * since we | |
1443 | * do not want to also encode the :: nexthop for the aggregate | |
1444 | * route. | |
1445 | */ | |
1446 | if (CHECK_FLAG(flags, ZEBRA_FLAG_BLACKHOLE)) | |
1447 | api.nexthop_num = 0; | |
1448 | else | |
1449 | api.nexthop_num = valid_nh_count; | |
1450 | ||
1451 | api.nexthop = (struct in6_addr **)STREAM_DATA(bgp_nexthop_buf); | |
1452 | SET_FLAG(api.message, ZAPI_MESSAGE_IFINDEX); | |
1453 | api.ifindex_num = valid_nh_count; | |
1454 | api.ifindex = (ifindex_t *)STREAM_DATA(bgp_ifindices_buf); | |
1455 | if (has_valid_label) { | |
1456 | api.label_num = valid_nh_count; | |
1457 | api.label = (unsigned int *)STREAM_DATA(bgp_label_buf); | |
1458 | } else { | |
1459 | api.label_num = 0; | |
1460 | api.label = NULL; | |
1461 | } | |
1462 | SET_FLAG(api.message, ZAPI_MESSAGE_METRIC); | |
1463 | api.metric = metric; | |
1464 | api.tag = 0; | |
1465 | ||
1466 | if (tag) { | |
1467 | SET_FLAG(api.message, ZAPI_MESSAGE_TAG); | |
1468 | api.tag = tag; | |
1469 | } | |
1470 | ||
1471 | distance = bgp_distance_apply(p, info, afi, safi, bgp); | |
1472 | if (distance) { | |
1473 | SET_FLAG(api.message, ZAPI_MESSAGE_DISTANCE); | |
1474 | api.distance = distance; | |
1475 | } | |
1476 | ||
1477 | if (p->family == AF_INET) { | |
1478 | if (bgp_debug_zebra(p)) { | |
1479 | int i; | |
1480 | char label_buf[20]; | |
1481 | zlog_debug( | |
1482 | "Tx IPv4 route %s VRF %u %s/%d metric %u tag %" ROUTE_TAG_PRI, | |
1483 | valid_nh_count ? "add" : "delete", | |
1484 | bgp->vrf_id, | |
1485 | inet_ntop(AF_INET, &p->u.prefix4, | |
1486 | buf[0], sizeof(buf[0])), | |
1487 | p->prefixlen, api.metric, api.tag); | |
1488 | for (i = 0; i < api.nexthop_num; i++) { | |
1489 | label_buf[0] = '\0'; | |
1490 | if (has_valid_label) | |
1491 | sprintf(label_buf, "label %u", | |
1492 | api.label[i]); | |
1493 | zlog_debug( | |
1494 | " nhop [%d]: %s if %s %s", | |
1495 | i + 1, | |
1496 | inet_ntop(AF_INET6, | |
1497 | api.nexthop[i], | |
1498 | buf[1], | |
1499 | sizeof(buf[1])), | |
1500 | ifindex2ifname(api.ifindex[i], | |
1501 | bgp->vrf_id), | |
1502 | label_buf); | |
1503 | } | |
1504 | } | |
1505 | ||
1506 | if (valid_nh_count) | |
1507 | zapi_ipv4_route_ipv6_nexthop( | |
1508 | ZEBRA_IPV4_ROUTE_IPV6_NEXTHOP_ADD, | |
1509 | zclient, (struct prefix_ipv4 *)p, | |
1510 | (struct zapi_ipv6 *)&api); | |
1511 | else | |
1512 | zapi_ipv4_route(ZEBRA_IPV4_ROUTE_DELETE, | |
1513 | zclient, | |
1514 | (struct prefix_ipv4 *)p, | |
1515 | (struct zapi_ipv4 *)&api); | |
1516 | } else { | |
1517 | if (bgp_debug_zebra(p)) { | |
1518 | int i; | |
1519 | char label_buf[20]; | |
1520 | zlog_debug( | |
1521 | "Tx IPv6 route %s VRF %u %s/%d metric %u tag %" ROUTE_TAG_PRI, | |
1522 | valid_nh_count ? "add" : "delete", | |
1523 | bgp->vrf_id, | |
1524 | inet_ntop(AF_INET6, &p->u.prefix6, | |
1525 | buf[0], sizeof(buf[0])), | |
1526 | p->prefixlen, api.metric, api.tag); | |
1527 | for (i = 0; i < api.nexthop_num; i++) { | |
1528 | label_buf[0] = '\0'; | |
1529 | if (has_valid_label) | |
1530 | sprintf(label_buf, "label %u", | |
1531 | api.label[i]); | |
1532 | zlog_debug( | |
1533 | " nhop [%d]: %s if %s %s", | |
1534 | i + 1, | |
1535 | inet_ntop(AF_INET6, | |
1536 | api.nexthop[i], | |
1537 | buf[1], | |
1538 | sizeof(buf[1])), | |
1539 | ifindex2ifname(api.ifindex[i], | |
1540 | bgp->vrf_id), | |
1541 | label_buf); | |
1542 | } | |
1543 | } | |
1544 | ||
1545 | zapi_ipv6_route( | |
1546 | valid_nh_count ? ZEBRA_IPV6_ROUTE_ADD | |
1547 | : ZEBRA_IPV6_ROUTE_DELETE, | |
1548 | zclient, (struct prefix_ipv6 *)p, NULL, &api); | |
1549 | } | |
1550 | } | |
718e3744 | 1551 | } |
1552 | ||
73ac8160 | 1553 | /* Announce all routes of a table to zebra */ |
d62a17ae | 1554 | void bgp_zebra_announce_table(struct bgp *bgp, afi_t afi, safi_t safi) |
73ac8160 | 1555 | { |
d62a17ae | 1556 | struct bgp_node *rn; |
1557 | struct bgp_table *table; | |
1558 | struct bgp_info *ri; | |
1559 | ||
1560 | /* Don't try to install if we're not connected to Zebra or Zebra doesn't | |
1561 | * know of this instance. | |
1562 | */ | |
1563 | if (!bgp_install_info_to_zebra(bgp)) | |
1564 | return; | |
1565 | ||
1566 | table = bgp->rib[afi][safi]; | |
1567 | if (!table) | |
1568 | return; | |
1569 | ||
1570 | for (rn = bgp_table_top(table); rn; rn = bgp_route_next(rn)) | |
1571 | for (ri = rn->info; ri; ri = ri->next) | |
1572 | if (CHECK_FLAG(ri->flags, BGP_INFO_SELECTED) | |
1573 | && ri->type == ZEBRA_ROUTE_BGP | |
1574 | && ri->sub_type == BGP_ROUTE_NORMAL) | |
1575 | bgp_zebra_announce(rn, &rn->p, ri, bgp, afi, | |
1576 | safi); | |
73ac8160 DS |
1577 | } |
1578 | ||
d62a17ae | 1579 | void bgp_zebra_withdraw(struct prefix *p, struct bgp_info *info, safi_t safi) |
718e3744 | 1580 | { |
d62a17ae | 1581 | u_int32_t flags; |
1582 | struct peer *peer; | |
1583 | ||
1584 | peer = info->peer; | |
1585 | assert(peer); | |
1586 | ||
1587 | /* Don't try to install if we're not connected to Zebra or Zebra doesn't | |
1588 | * know of this instance. | |
1589 | */ | |
1590 | if (!bgp_install_info_to_zebra(peer->bgp)) | |
1591 | return; | |
1592 | ||
1593 | if ((p->family == AF_INET | |
1594 | && !vrf_bitmap_check(zclient->redist[AFI_IP][ZEBRA_ROUTE_BGP], | |
1595 | peer->bgp->vrf_id)) | |
1596 | || (p->family == AF_INET6 | |
1597 | && !vrf_bitmap_check(zclient->redist[AFI_IP6][ZEBRA_ROUTE_BGP], | |
1598 | peer->bgp->vrf_id))) | |
1599 | return; | |
1600 | ||
1601 | flags = 0; | |
1602 | ||
1603 | if (peer->sort == BGP_PEER_IBGP) { | |
1604 | SET_FLAG(flags, ZEBRA_FLAG_INTERNAL); | |
1605 | SET_FLAG(flags, ZEBRA_FLAG_IBGP); | |
a39275d7 AS |
1606 | } |
1607 | ||
d62a17ae | 1608 | if ((peer->sort == BGP_PEER_EBGP && peer->ttl != 1) |
1609 | || CHECK_FLAG(peer->flags, PEER_FLAG_DISABLE_CONNECTED_CHECK) | |
1610 | || bgp_flag_check(peer->bgp, BGP_FLAG_DISABLE_NH_CONNECTED_CHK)) | |
1611 | SET_FLAG(flags, ZEBRA_FLAG_INTERNAL); | |
1612 | ||
1613 | if (p->family == AF_INET) { | |
1614 | struct zapi_ipv4 api; | |
1615 | ||
1616 | api.vrf_id = peer->bgp->vrf_id; | |
1617 | api.flags = flags; | |
1618 | ||
1619 | api.type = ZEBRA_ROUTE_BGP; | |
1620 | api.instance = 0; | |
1621 | api.message = 0; | |
1622 | api.safi = safi; | |
1623 | SET_FLAG(api.message, ZAPI_MESSAGE_NEXTHOP); | |
1624 | api.nexthop_num = 0; | |
1625 | api.nexthop = NULL; | |
1626 | api.label_num = 0; | |
1627 | api.label = NULL; | |
1628 | api.ifindex_num = 0; | |
1629 | SET_FLAG(api.message, ZAPI_MESSAGE_METRIC); | |
1630 | api.metric = info->attr->med; | |
1631 | api.tag = 0; | |
1632 | ||
1633 | if (info->attr->tag != 0) { | |
1634 | SET_FLAG(api.message, ZAPI_MESSAGE_TAG); | |
1635 | api.tag = info->attr->tag; | |
1636 | } | |
1637 | ||
1638 | if (bgp_debug_zebra(p)) { | |
1639 | char buf[2][INET_ADDRSTRLEN]; | |
1640 | zlog_debug( | |
1641 | "Tx IPv4 route delete VRF %u %s/%d metric %u tag %" ROUTE_TAG_PRI, | |
1642 | peer->bgp->vrf_id, | |
1643 | inet_ntop(AF_INET, &p->u.prefix4, buf[0], | |
1644 | sizeof(buf[0])), | |
1645 | p->prefixlen, api.metric, api.tag); | |
1646 | } | |
1647 | ||
1648 | zapi_ipv4_route(ZEBRA_IPV4_ROUTE_DELETE, zclient, | |
1649 | (struct prefix_ipv4 *)p, &api); | |
1650 | } | |
1651 | /* We have to think about a IPv6 link-local address curse. */ | |
1652 | if (p->family == AF_INET6) { | |
1653 | struct zapi_ipv6 api; | |
1654 | ||
1655 | api.vrf_id = peer->bgp->vrf_id; | |
1656 | api.flags = flags; | |
1657 | api.type = ZEBRA_ROUTE_BGP; | |
1658 | api.instance = 0; | |
1659 | api.message = 0; | |
1660 | api.safi = safi; | |
1661 | SET_FLAG(api.message, ZAPI_MESSAGE_NEXTHOP); | |
1662 | api.nexthop_num = 0; | |
1663 | api.nexthop = NULL; | |
1664 | api.ifindex_num = 0; | |
1665 | api.label_num = 0; | |
1666 | SET_FLAG(api.message, ZAPI_MESSAGE_METRIC); | |
1667 | api.metric = info->attr->med; | |
1668 | api.tag = 0; | |
1669 | ||
1670 | if (info->attr->tag != 0) { | |
1671 | SET_FLAG(api.message, ZAPI_MESSAGE_TAG); | |
1672 | api.tag = info->attr->tag; | |
1673 | } | |
1674 | ||
1675 | if (bgp_debug_zebra(p)) { | |
1676 | char buf[2][INET6_ADDRSTRLEN]; | |
1677 | zlog_debug( | |
1678 | "Tx IPv6 route delete VRF %u %s/%d metric %u tag %" ROUTE_TAG_PRI, | |
1679 | peer->bgp->vrf_id, | |
1680 | inet_ntop(AF_INET6, &p->u.prefix6, buf[0], | |
1681 | sizeof(buf[0])), | |
1682 | p->prefixlen, api.metric, api.tag); | |
1683 | } | |
1684 | ||
1685 | zapi_ipv6_route(ZEBRA_IPV6_ROUTE_DELETE, zclient, | |
1686 | (struct prefix_ipv6 *)p, NULL, &api); | |
a39275d7 | 1687 | } |
718e3744 | 1688 | } |
56c1f7d8 | 1689 | |
d62a17ae | 1690 | struct bgp_redist *bgp_redist_lookup(struct bgp *bgp, afi_t afi, u_char type, |
1691 | u_short instance) | |
7c8ff89e | 1692 | { |
d62a17ae | 1693 | struct list *red_list; |
1694 | struct listnode *node; | |
1695 | struct bgp_redist *red; | |
7c8ff89e | 1696 | |
d62a17ae | 1697 | red_list = bgp->redist[afi][type]; |
1698 | if (!red_list) | |
1699 | return (NULL); | |
7c8ff89e | 1700 | |
d62a17ae | 1701 | for (ALL_LIST_ELEMENTS_RO(red_list, node, red)) |
1702 | if (red->instance == instance) | |
1703 | return red; | |
7c8ff89e | 1704 | |
d62a17ae | 1705 | return NULL; |
7c8ff89e DS |
1706 | } |
1707 | ||
d62a17ae | 1708 | struct bgp_redist *bgp_redist_add(struct bgp *bgp, afi_t afi, u_char type, |
1709 | u_short instance) | |
7c8ff89e | 1710 | { |
d62a17ae | 1711 | struct list *red_list; |
1712 | struct bgp_redist *red; | |
7c8ff89e | 1713 | |
d62a17ae | 1714 | red = bgp_redist_lookup(bgp, afi, type, instance); |
1715 | if (red) | |
1716 | return red; | |
7c8ff89e | 1717 | |
d62a17ae | 1718 | if (!bgp->redist[afi][type]) |
1719 | bgp->redist[afi][type] = list_new(); | |
7c8ff89e | 1720 | |
d62a17ae | 1721 | red_list = bgp->redist[afi][type]; |
1722 | red = (struct bgp_redist *)XCALLOC(MTYPE_BGP_REDIST, | |
1723 | sizeof(struct bgp_redist)); | |
1724 | red->instance = instance; | |
7c8ff89e | 1725 | |
d62a17ae | 1726 | listnode_add(red_list, red); |
7c8ff89e | 1727 | |
d62a17ae | 1728 | return red; |
7c8ff89e DS |
1729 | } |
1730 | ||
d62a17ae | 1731 | static void bgp_redist_del(struct bgp *bgp, afi_t afi, u_char type, |
1732 | u_short instance) | |
7c8ff89e | 1733 | { |
d62a17ae | 1734 | struct bgp_redist *red; |
1735 | ||
1736 | red = bgp_redist_lookup(bgp, afi, type, instance); | |
1737 | ||
1738 | if (red) { | |
1739 | listnode_delete(bgp->redist[afi][type], red); | |
1740 | XFREE(MTYPE_BGP_REDIST, red); | |
1741 | if (!bgp->redist[afi][type]->count) { | |
1742 | list_free(bgp->redist[afi][type]); | |
1743 | bgp->redist[afi][type] = NULL; | |
1744 | } | |
1745 | } | |
7c8ff89e | 1746 | } |
6b0655a2 | 1747 | |
718e3744 | 1748 | /* Other routes redistribution into BGP. */ |
d62a17ae | 1749 | int bgp_redistribute_set(struct bgp *bgp, afi_t afi, int type, u_short instance) |
718e3744 | 1750 | { |
718e3744 | 1751 | |
d62a17ae | 1752 | /* Return if already redistribute flag is set. */ |
1753 | if (instance) { | |
1754 | if (redist_check_instance(&zclient->mi_redist[afi][type], | |
1755 | instance)) | |
1756 | return CMD_WARNING; | |
718e3744 | 1757 | |
d62a17ae | 1758 | redist_add_instance(&zclient->mi_redist[afi][type], instance); |
1759 | } else { | |
1760 | if (vrf_bitmap_check(zclient->redist[afi][type], bgp->vrf_id)) | |
1761 | return CMD_WARNING; | |
7076bb2f | 1762 | |
65efcfce | 1763 | #if ENABLE_BGP_VNC |
d62a17ae | 1764 | if (bgp->vrf_id == VRF_DEFAULT |
1765 | && type == ZEBRA_ROUTE_VNC_DIRECT) { | |
1766 | vnc_export_bgp_enable( | |
1767 | bgp, afi); /* only enables if mode bits cfg'd */ | |
1768 | } | |
65efcfce LB |
1769 | #endif |
1770 | ||
d62a17ae | 1771 | vrf_bitmap_set(zclient->redist[afi][type], bgp->vrf_id); |
1772 | } | |
718e3744 | 1773 | |
d62a17ae | 1774 | /* Don't try to register if we're not connected to Zebra or Zebra |
1775 | * doesn't | |
1776 | * know of this instance. | |
1777 | */ | |
1778 | if (!bgp_install_info_to_zebra(bgp)) | |
1779 | return CMD_WARNING_CONFIG_FAILED; | |
a39275d7 | 1780 | |
d62a17ae | 1781 | if (BGP_DEBUG(zebra, ZEBRA)) |
1782 | zlog_debug("Tx redistribute add VRF %u afi %d %s %d", | |
1783 | bgp->vrf_id, afi, zebra_route_string(type), | |
1784 | instance); | |
518f0eb1 | 1785 | |
d62a17ae | 1786 | /* Send distribute add message to zebra. */ |
1787 | zebra_redistribute_send(ZEBRA_REDISTRIBUTE_ADD, zclient, afi, type, | |
1788 | instance, bgp->vrf_id); | |
718e3744 | 1789 | |
d62a17ae | 1790 | return CMD_SUCCESS; |
718e3744 | 1791 | } |
1792 | ||
d62a17ae | 1793 | int bgp_redistribute_resend(struct bgp *bgp, afi_t afi, int type, |
1794 | u_short instance) | |
518f0eb1 | 1795 | { |
d62a17ae | 1796 | /* Don't try to send if we're not connected to Zebra or Zebra doesn't |
1797 | * know of this instance. | |
1798 | */ | |
1799 | if (!bgp_install_info_to_zebra(bgp)) | |
1800 | return -1; | |
1801 | ||
1802 | if (BGP_DEBUG(zebra, ZEBRA)) | |
1803 | zlog_debug("Tx redistribute del/add VRF %u afi %d %s %d", | |
1804 | bgp->vrf_id, afi, zebra_route_string(type), | |
1805 | instance); | |
1806 | ||
1807 | /* Send distribute add message to zebra. */ | |
1808 | zebra_redistribute_send(ZEBRA_REDISTRIBUTE_DELETE, zclient, afi, type, | |
1809 | instance, bgp->vrf_id); | |
1810 | zebra_redistribute_send(ZEBRA_REDISTRIBUTE_ADD, zclient, afi, type, | |
1811 | instance, bgp->vrf_id); | |
1812 | ||
1813 | return 0; | |
518f0eb1 DS |
1814 | } |
1815 | ||
718e3744 | 1816 | /* Redistribute with route-map specification. */ |
d62a17ae | 1817 | int bgp_redistribute_rmap_set(struct bgp_redist *red, const char *name) |
718e3744 | 1818 | { |
d62a17ae | 1819 | if (red->rmap.name && (strcmp(red->rmap.name, name) == 0)) |
1820 | return 0; | |
718e3744 | 1821 | |
d62a17ae | 1822 | if (red->rmap.name) |
1823 | XFREE(MTYPE_ROUTE_MAP_NAME, red->rmap.name); | |
1824 | red->rmap.name = XSTRDUP(MTYPE_ROUTE_MAP_NAME, name); | |
1825 | red->rmap.map = route_map_lookup_by_name(name); | |
718e3744 | 1826 | |
d62a17ae | 1827 | return 1; |
718e3744 | 1828 | } |
1829 | ||
1830 | /* Redistribute with metric specification. */ | |
d62a17ae | 1831 | int bgp_redistribute_metric_set(struct bgp *bgp, struct bgp_redist *red, |
1832 | afi_t afi, int type, u_int32_t metric) | |
718e3744 | 1833 | { |
d62a17ae | 1834 | struct bgp_node *rn; |
1835 | struct bgp_info *ri; | |
1836 | ||
1837 | if (red->redist_metric_flag && red->redist_metric == metric) | |
1838 | return 0; | |
1839 | ||
1840 | red->redist_metric_flag = 1; | |
1841 | red->redist_metric = metric; | |
1842 | ||
1843 | for (rn = bgp_table_top(bgp->rib[afi][SAFI_UNICAST]); rn; | |
1844 | rn = bgp_route_next(rn)) { | |
1845 | for (ri = rn->info; ri; ri = ri->next) { | |
1846 | if (ri->sub_type == BGP_ROUTE_REDISTRIBUTE | |
1847 | && ri->type == type | |
1848 | && ri->instance == red->instance) { | |
1849 | struct attr *old_attr; | |
1850 | struct attr new_attr; | |
1851 | ||
1852 | bgp_attr_dup(&new_attr, ri->attr); | |
1853 | new_attr.med = red->redist_metric; | |
1854 | old_attr = ri->attr; | |
1855 | ri->attr = bgp_attr_intern(&new_attr); | |
1856 | bgp_attr_unintern(&old_attr); | |
1857 | ||
1858 | bgp_info_set_flag(rn, ri, | |
1859 | BGP_INFO_ATTR_CHANGED); | |
1860 | bgp_process(bgp, rn, afi, SAFI_UNICAST); | |
1861 | } | |
1862 | } | |
1863 | } | |
1864 | ||
1865 | return 1; | |
718e3744 | 1866 | } |
1867 | ||
1868 | /* Unset redistribution. */ | |
d62a17ae | 1869 | int bgp_redistribute_unreg(struct bgp *bgp, afi_t afi, int type, |
1870 | u_short instance) | |
718e3744 | 1871 | { |
d62a17ae | 1872 | struct bgp_redist *red; |
1873 | ||
1874 | red = bgp_redist_lookup(bgp, afi, type, instance); | |
1875 | if (!red) | |
1876 | return CMD_SUCCESS; | |
1877 | ||
1878 | /* Return if zebra connection is disabled. */ | |
1879 | if (instance) { | |
1880 | if (!redist_check_instance(&zclient->mi_redist[afi][type], | |
1881 | instance)) | |
1882 | return CMD_WARNING; | |
1883 | redist_del_instance(&zclient->mi_redist[afi][type], instance); | |
1884 | } else { | |
1885 | if (!vrf_bitmap_check(zclient->redist[afi][type], bgp->vrf_id)) | |
1886 | return CMD_WARNING; | |
1887 | vrf_bitmap_unset(zclient->redist[afi][type], bgp->vrf_id); | |
1888 | } | |
718e3744 | 1889 | |
65efcfce | 1890 | #if ENABLE_BGP_VNC |
d62a17ae | 1891 | if (bgp->vrf_id == VRF_DEFAULT && type == ZEBRA_ROUTE_VNC_DIRECT) { |
1892 | vnc_export_bgp_disable(bgp, afi); | |
1893 | } | |
65efcfce LB |
1894 | #endif |
1895 | ||
d62a17ae | 1896 | if (bgp_install_info_to_zebra(bgp)) { |
1897 | /* Send distribute delete message to zebra. */ | |
1898 | if (BGP_DEBUG(zebra, ZEBRA)) | |
1899 | zlog_debug("Tx redistribute del VRF %u afi %d %s %d", | |
1900 | bgp->vrf_id, afi, zebra_route_string(type), | |
1901 | instance); | |
1902 | zebra_redistribute_send(ZEBRA_REDISTRIBUTE_DELETE, zclient, afi, | |
1903 | type, instance, bgp->vrf_id); | |
1904 | } | |
1905 | ||
1906 | /* Withdraw redistributed routes from current BGP's routing table. */ | |
1907 | bgp_redistribute_withdraw(bgp, afi, type, instance); | |
1908 | ||
1909 | return CMD_SUCCESS; | |
718e3744 | 1910 | } |
1911 | ||
6aeb9e78 | 1912 | /* Unset redistribution. */ |
d62a17ae | 1913 | int bgp_redistribute_unset(struct bgp *bgp, afi_t afi, int type, |
1914 | u_short instance) | |
6aeb9e78 | 1915 | { |
d62a17ae | 1916 | struct bgp_redist *red; |
6aeb9e78 | 1917 | |
d62a17ae | 1918 | red = bgp_redist_lookup(bgp, afi, type, instance); |
1919 | if (!red) | |
1920 | return CMD_SUCCESS; | |
6aeb9e78 | 1921 | |
d62a17ae | 1922 | bgp_redistribute_unreg(bgp, afi, type, instance); |
6aeb9e78 | 1923 | |
d62a17ae | 1924 | /* Unset route-map. */ |
1925 | if (red->rmap.name) | |
1926 | XFREE(MTYPE_ROUTE_MAP_NAME, red->rmap.name); | |
1927 | red->rmap.name = NULL; | |
1928 | red->rmap.map = NULL; | |
6aeb9e78 | 1929 | |
d62a17ae | 1930 | /* Unset metric. */ |
1931 | red->redist_metric_flag = 0; | |
1932 | red->redist_metric = 0; | |
6aeb9e78 | 1933 | |
d62a17ae | 1934 | bgp_redist_del(bgp, afi, type, instance); |
6aeb9e78 | 1935 | |
d62a17ae | 1936 | return CMD_SUCCESS; |
6aeb9e78 DS |
1937 | } |
1938 | ||
eb117f29 SK |
1939 | /* Update redistribute vrf bitmap during triggers like |
1940 | restart networking or delete/add VRFs */ | |
d62a17ae | 1941 | void bgp_update_redist_vrf_bitmaps(struct bgp *bgp, vrf_id_t old_vrf_id) |
eb117f29 | 1942 | { |
d62a17ae | 1943 | int i; |
1944 | afi_t afi; | |
1945 | ||
1946 | for (afi = AFI_IP; afi < AFI_MAX; afi++) | |
1947 | for (i = 0; i < ZEBRA_ROUTE_MAX; i++) | |
1948 | if (vrf_bitmap_check(zclient->redist[afi][i], | |
1949 | old_vrf_id)) { | |
1950 | vrf_bitmap_unset(zclient->redist[afi][i], | |
1951 | old_vrf_id); | |
1952 | vrf_bitmap_set(zclient->redist[afi][i], | |
1953 | bgp->vrf_id); | |
1954 | } | |
1955 | return; | |
eb117f29 SK |
1956 | } |
1957 | ||
d62a17ae | 1958 | void bgp_zclient_reset(void) |
718e3744 | 1959 | { |
d62a17ae | 1960 | zclient_reset(zclient); |
718e3744 | 1961 | } |
1962 | ||
ad4cbda1 | 1963 | /* Register this instance with Zebra. Invoked upon connect (for |
1964 | * default instance) and when other VRFs are learnt (or created and | |
1965 | * already learnt). | |
1966 | */ | |
d62a17ae | 1967 | void bgp_zebra_instance_register(struct bgp *bgp) |
ad4cbda1 | 1968 | { |
d62a17ae | 1969 | /* Don't try to register if we're not connected to Zebra */ |
1970 | if (!zclient || zclient->sock < 0) | |
1971 | return; | |
ad4cbda1 | 1972 | |
d62a17ae | 1973 | if (BGP_DEBUG(zebra, ZEBRA)) |
1974 | zlog_debug("Registering VRF %u", bgp->vrf_id); | |
ad4cbda1 | 1975 | |
d62a17ae | 1976 | /* Register for router-id, interfaces, redistributed routes. */ |
1977 | zclient_send_reg_requests(zclient, bgp->vrf_id); | |
7724c0a1 | 1978 | |
d62a17ae | 1979 | /* For default instance, register to learn about VNIs, if appropriate. |
1980 | */ | |
1981 | if (bgp->inst_type == BGP_INSTANCE_TYPE_DEFAULT | |
1982 | && bgp->advertise_all_vni) | |
1983 | bgp_zebra_advertise_all_vni(bgp, 1); | |
ad4cbda1 | 1984 | } |
1985 | ||
1986 | /* Deregister this instance with Zebra. Invoked upon the instance | |
1987 | * being deleted (default or VRF) and it is already registered. | |
1988 | */ | |
d62a17ae | 1989 | void bgp_zebra_instance_deregister(struct bgp *bgp) |
ad4cbda1 | 1990 | { |
d62a17ae | 1991 | /* Don't try to deregister if we're not connected to Zebra */ |
1992 | if (zclient->sock < 0) | |
1993 | return; | |
ad4cbda1 | 1994 | |
d62a17ae | 1995 | if (BGP_DEBUG(zebra, ZEBRA)) |
1996 | zlog_debug("Deregistering VRF %u", bgp->vrf_id); | |
ad4cbda1 | 1997 | |
d62a17ae | 1998 | /* For default instance, unregister learning about VNIs, if appropriate. |
1999 | */ | |
2000 | if (bgp->inst_type == BGP_INSTANCE_TYPE_DEFAULT | |
2001 | && bgp->advertise_all_vni) | |
2002 | bgp_zebra_advertise_all_vni(bgp, 0); | |
7724c0a1 | 2003 | |
d62a17ae | 2004 | /* Deregister for router-id, interfaces, redistributed routes. */ |
2005 | zclient_send_dereg_requests(zclient, bgp->vrf_id); | |
ad4cbda1 | 2006 | } |
2007 | ||
d62a17ae | 2008 | void bgp_zebra_initiate_radv(struct bgp *bgp, struct peer *peer) |
4a04e5f7 | 2009 | { |
d62a17ae | 2010 | int ra_interval = BGP_UNNUM_DEFAULT_RA_INTERVAL; |
5c81b96a | 2011 | |
d62a17ae | 2012 | /* Don't try to initiate if we're not connected to Zebra */ |
2013 | if (zclient->sock < 0) | |
2014 | return; | |
4a04e5f7 | 2015 | |
d62a17ae | 2016 | if (BGP_DEBUG(zebra, ZEBRA)) |
2017 | zlog_debug("%u: Initiating RA for peer %s", bgp->vrf_id, | |
2018 | peer->host); | |
4a04e5f7 | 2019 | |
d62a17ae | 2020 | zclient_send_interface_radv_req(zclient, bgp->vrf_id, peer->ifp, 1, |
2021 | ra_interval); | |
4a04e5f7 | 2022 | } |
2023 | ||
d62a17ae | 2024 | void bgp_zebra_terminate_radv(struct bgp *bgp, struct peer *peer) |
4a04e5f7 | 2025 | { |
d62a17ae | 2026 | /* Don't try to terminate if we're not connected to Zebra */ |
2027 | if (zclient->sock < 0) | |
2028 | return; | |
4a04e5f7 | 2029 | |
d62a17ae | 2030 | if (BGP_DEBUG(zebra, ZEBRA)) |
2031 | zlog_debug("%u: Terminating RA for peer %s", bgp->vrf_id, | |
2032 | peer->host); | |
4a04e5f7 | 2033 | |
d62a17ae | 2034 | zclient_send_interface_radv_req(zclient, bgp->vrf_id, peer->ifp, 0, 0); |
4a04e5f7 | 2035 | } |
2036 | ||
d62a17ae | 2037 | int bgp_zebra_advertise_all_vni(struct bgp *bgp, int advertise) |
7724c0a1 | 2038 | { |
d62a17ae | 2039 | struct stream *s; |
7724c0a1 | 2040 | |
d62a17ae | 2041 | /* Check socket. */ |
2042 | if (!zclient || zclient->sock < 0) | |
2043 | return 0; | |
7724c0a1 | 2044 | |
d62a17ae | 2045 | /* Don't try to register if Zebra doesn't know of this instance. */ |
2046 | if (!IS_BGP_INST_KNOWN_TO_ZEBRA(bgp)) | |
2047 | return 0; | |
7724c0a1 | 2048 | |
d62a17ae | 2049 | s = zclient->obuf; |
2050 | stream_reset(s); | |
7724c0a1 | 2051 | |
d62a17ae | 2052 | zclient_create_header(s, ZEBRA_ADVERTISE_ALL_VNI, bgp->vrf_id); |
2053 | stream_putc(s, advertise); | |
2054 | stream_putw_at(s, 0, stream_get_endp(s)); | |
7724c0a1 | 2055 | |
d62a17ae | 2056 | return zclient_send_message(zclient); |
7724c0a1 | 2057 | } |
2058 | ||
ad4cbda1 | 2059 | /* BGP has established connection with Zebra. */ |
d62a17ae | 2060 | static void bgp_zebra_connected(struct zclient *zclient) |
7076bb2f | 2061 | { |
d62a17ae | 2062 | struct bgp *bgp; |
7076bb2f | 2063 | |
d62a17ae | 2064 | zclient_num_connects++; /* increment even if not responding */ |
afbb1c59 | 2065 | |
d62a17ae | 2066 | /* At this point, we may or may not have BGP instances configured, but |
2067 | * we're only interested in the default VRF (others wouldn't have learnt | |
2068 | * the VRF from Zebra yet.) | |
2069 | */ | |
2070 | bgp = bgp_get_default(); | |
2071 | if (!bgp) | |
2072 | return; | |
ad4cbda1 | 2073 | |
d62a17ae | 2074 | bgp_zebra_instance_register(bgp); |
ad4cbda1 | 2075 | |
d62a17ae | 2076 | /* Send the client registration */ |
2077 | bfd_client_sendmsg(zclient, ZEBRA_BFD_CLIENT_REGISTER); | |
2376c3f2 | 2078 | |
d62a17ae | 2079 | /* TODO - What if we have peers and networks configured, do we have to |
2080 | * kick-start them? | |
2081 | */ | |
7076bb2f FL |
2082 | } |
2083 | ||
d62a17ae | 2084 | static int bgp_zebra_process_local_vni(int command, struct zclient *zclient, |
2085 | zebra_size_t length, vrf_id_t vrf_id) | |
128ea8ab | 2086 | { |
d62a17ae | 2087 | struct stream *s; |
2088 | vni_t vni; | |
2089 | struct bgp *bgp; | |
2090 | struct in_addr vtep_ip; | |
2091 | ||
2092 | s = zclient->ibuf; | |
2093 | vni = stream_getl(s); | |
2094 | if (command == ZEBRA_VNI_ADD) | |
2095 | vtep_ip.s_addr = stream_get_ipv4(s); | |
2096 | bgp = bgp_lookup_by_vrf_id(vrf_id); | |
2097 | if (!bgp) | |
2098 | return 0; | |
2099 | ||
2100 | if (BGP_DEBUG(zebra, ZEBRA)) | |
2101 | zlog_debug("Rx VNI %s VRF %u VNI %u", | |
2102 | (command == ZEBRA_VNI_ADD) ? "add" : "del", vrf_id, | |
2103 | vni); | |
2104 | ||
2105 | if (command == ZEBRA_VNI_ADD) | |
2106 | return bgp_evpn_local_vni_add( | |
2107 | bgp, vni, vtep_ip.s_addr ? vtep_ip : bgp->router_id); | |
2108 | else | |
2109 | return bgp_evpn_local_vni_del(bgp, vni); | |
128ea8ab | 2110 | } |
2111 | ||
d62a17ae | 2112 | static int bgp_zebra_process_local_macip(int command, struct zclient *zclient, |
2113 | zebra_size_t length, vrf_id_t vrf_id) | |
128ea8ab | 2114 | { |
d62a17ae | 2115 | struct stream *s; |
2116 | vni_t vni; | |
2117 | struct bgp *bgp; | |
2118 | struct ethaddr mac; | |
2119 | struct ipaddr ip; | |
2120 | int ipa_len; | |
2121 | char buf[ETHER_ADDR_STRLEN]; | |
2122 | char buf1[INET6_ADDRSTRLEN]; | |
2123 | u_char sticky; | |
2124 | ||
2125 | memset(&ip, 0, sizeof(ip)); | |
2126 | s = zclient->ibuf; | |
2127 | vni = stream_getl(s); | |
2128 | stream_get(&mac.octet, s, ETHER_ADDR_LEN); | |
2129 | ipa_len = stream_getl(s); | |
2130 | if (ipa_len != 0 && ipa_len != IPV4_MAX_BYTELEN | |
2131 | && ipa_len != IPV6_MAX_BYTELEN) { | |
2132 | zlog_err("%u:Recv MACIP %s with invalid IP addr length %d", | |
2133 | vrf_id, (command == ZEBRA_MACIP_ADD) ? "Add" : "Del", | |
2134 | ipa_len); | |
2135 | return -1; | |
2136 | } | |
2137 | ||
2138 | if (ipa_len) { | |
2139 | ip.ipa_type = | |
2140 | (ipa_len == IPV4_MAX_BYTELEN) ? IPADDR_V4 : IPADDR_V6; | |
2141 | stream_get(&ip.ip.addr, s, ipa_len); | |
2142 | } | |
2143 | sticky = stream_getc(s); | |
2144 | ||
2145 | bgp = bgp_lookup_by_vrf_id(vrf_id); | |
2146 | if (!bgp) | |
2147 | return 0; | |
2148 | ||
2149 | if (BGP_DEBUG(zebra, ZEBRA)) | |
2150 | zlog_debug("%u:Recv MACIP %s %sMAC %s IP %s VNI %u", vrf_id, | |
2151 | (command == ZEBRA_MACIP_ADD) ? "Add" : "Del", | |
2152 | sticky ? "sticky " : "", | |
2153 | prefix_mac2str(&mac, buf, sizeof(buf)), | |
2154 | ipaddr2str(&ip, buf1, sizeof(buf1)), vni); | |
2155 | ||
2156 | if (command == ZEBRA_MACIP_ADD) | |
2157 | return bgp_evpn_local_macip_add(bgp, vni, &mac, &ip, sticky); | |
2158 | else | |
2159 | return bgp_evpn_local_macip_del(bgp, vni, &mac, &ip); | |
128ea8ab | 2160 | } |
6aeb9e78 | 2161 | |
d62a17ae | 2162 | void bgp_zebra_init(struct thread_master *master) |
718e3744 | 2163 | { |
d62a17ae | 2164 | zclient_num_connects = 0; |
2165 | ||
2166 | /* Set default values. */ | |
2167 | zclient = zclient_new(master); | |
2168 | zclient_init(zclient, ZEBRA_ROUTE_BGP, 0); | |
2169 | zclient->zebra_connected = bgp_zebra_connected; | |
2170 | zclient->router_id_update = bgp_router_id_update; | |
2171 | zclient->interface_add = bgp_interface_add; | |
2172 | zclient->interface_delete = bgp_interface_delete; | |
2173 | zclient->interface_address_add = bgp_interface_address_add; | |
2174 | zclient->interface_address_delete = bgp_interface_address_delete; | |
2175 | zclient->interface_nbr_address_add = bgp_interface_nbr_address_add; | |
2176 | zclient->interface_nbr_address_delete = | |
2177 | bgp_interface_nbr_address_delete; | |
2178 | zclient->interface_vrf_update = bgp_interface_vrf_update; | |
2179 | zclient->redistribute_route_ipv4_add = zebra_read_ipv4; | |
2180 | zclient->redistribute_route_ipv4_del = zebra_read_ipv4; | |
2181 | zclient->interface_up = bgp_interface_up; | |
2182 | zclient->interface_down = bgp_interface_down; | |
2183 | zclient->redistribute_route_ipv6_add = zebra_read_ipv6; | |
2184 | zclient->redistribute_route_ipv6_del = zebra_read_ipv6; | |
2185 | zclient->nexthop_update = bgp_read_nexthop_update; | |
2186 | zclient->import_check_update = bgp_read_import_check_update; | |
2187 | zclient->fec_update = bgp_read_fec_update; | |
2188 | zclient->local_vni_add = bgp_zebra_process_local_vni; | |
2189 | zclient->local_vni_del = bgp_zebra_process_local_vni; | |
2190 | zclient->local_macip_add = bgp_zebra_process_local_macip; | |
2191 | zclient->local_macip_del = bgp_zebra_process_local_macip; | |
2192 | ||
2193 | bgp_nexthop_buf = stream_new(multipath_num * sizeof(struct in6_addr)); | |
2194 | bgp_ifindices_buf = stream_new(multipath_num * sizeof(unsigned int)); | |
2195 | bgp_label_buf = stream_new(multipath_num * sizeof(unsigned int)); | |
718e3744 | 2196 | } |
bb86c601 | 2197 | |
d62a17ae | 2198 | void bgp_zebra_destroy(void) |
bb86c601 | 2199 | { |
d1e7e033 | 2200 | |
d62a17ae | 2201 | if (bgp_nexthop_buf) |
2202 | stream_free(bgp_nexthop_buf); | |
2203 | if (bgp_ifindices_buf) | |
2204 | stream_free(bgp_ifindices_buf); | |
2205 | if (bgp_label_buf) | |
2206 | stream_free(bgp_label_buf); | |
2207 | ||
2208 | if (zclient == NULL) | |
2209 | return; | |
2210 | zclient_stop(zclient); | |
2211 | zclient_free(zclient); | |
2212 | zclient = NULL; | |
bb86c601 | 2213 | } |
afbb1c59 | 2214 | |
d62a17ae | 2215 | int bgp_zebra_num_connects(void) |
afbb1c59 | 2216 | { |
d62a17ae | 2217 | return zclient_num_connects; |
afbb1c59 | 2218 | } |