]>
Commit | Line | Data |
---|---|---|
718e3744 | 1 | /* Kernel routing table updates using netlink over GNU/Linux system. |
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 | * | |
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 | |
718e3744 | 19 | */ |
20 | ||
21 | #include <zebra.h> | |
ddfeb486 DL |
22 | |
23 | #ifdef HAVE_NETLINK | |
24 | ||
8ccc7e80 | 25 | #include <net/if_arp.h> |
718e3744 | 26 | |
27 | /* Hack for GNU libc version 2. */ | |
28 | #ifndef MSG_TRUNC | |
29 | #define MSG_TRUNC 0x20 | |
30 | #endif /* MSG_TRUNC */ | |
31 | ||
32 | #include "linklist.h" | |
33 | #include "if.h" | |
34 | #include "log.h" | |
35 | #include "prefix.h" | |
36 | #include "connected.h" | |
37 | #include "table.h" | |
26e2ae36 | 38 | #include "memory.h" |
4a1ab8e4 | 39 | #include "zebra_memory.h" |
718e3744 | 40 | #include "rib.h" |
e04ab74d | 41 | #include "thread.h" |
edd7c245 | 42 | #include "privs.h" |
fb018d25 | 43 | #include "nexthop.h" |
78104b9b | 44 | #include "vrf.h" |
5e6a74d8 | 45 | #include "vty.h" |
40c7bdb0 | 46 | #include "mpls.h" |
13d60d35 | 47 | #include "vxlan.h" |
718e3744 | 48 | |
49 | #include "zebra/zserv.h" | |
fe18ee2d | 50 | #include "zebra/zebra_ns.h" |
7c551956 | 51 | #include "zebra/zebra_vrf.h" |
6621ca86 | 52 | #include "zebra/rt.h" |
718e3744 | 53 | #include "zebra/redistribute.h" |
54 | #include "zebra/interface.h" | |
55 | #include "zebra/debug.h" | |
12f6fb97 | 56 | #include "zebra/rtadv.h" |
567b877d | 57 | #include "zebra/zebra_ptm.h" |
40c7bdb0 | 58 | #include "zebra/zebra_mpls.h" |
1fdc9eae | 59 | #include "zebra/kernel_netlink.h" |
60 | #include "zebra/rt_netlink.h" | |
e3be0432 | 61 | #include "zebra/zebra_mroute.h" |
2232a77c | 62 | #include "zebra/zebra_vxlan.h" |
e3be0432 | 63 | |
7021c425 | 64 | |
40c7bdb0 | 65 | /* TODO - Temporary definitions, need to refine. */ |
66 | #ifndef AF_MPLS | |
67 | #define AF_MPLS 28 | |
68 | #endif | |
69 | ||
70 | #ifndef RTA_VIA | |
c0f4be83 | 71 | #define RTA_VIA 18 |
40c7bdb0 | 72 | #endif |
73 | ||
74 | #ifndef RTA_NEWDST | |
75 | #define RTA_NEWDST 19 | |
76 | #endif | |
c0f4be83 | 77 | |
78 | #ifndef RTA_ENCAP_TYPE | |
79 | #define RTA_ENCAP_TYPE 21 | |
80 | #endif | |
81 | ||
82 | #ifndef RTA_ENCAP | |
83 | #define RTA_ENCAP 22 | |
84 | #endif | |
85 | ||
113db945 DS |
86 | #ifndef RTA_EXPIRES |
87 | #define RTA_EXPIRES 23 | |
88 | #endif | |
89 | ||
c0f4be83 | 90 | #ifndef LWTUNNEL_ENCAP_MPLS |
91 | #define LWTUNNEL_ENCAP_MPLS 1 | |
92 | #endif | |
93 | ||
94 | #ifndef MPLS_IPTUNNEL_DST | |
95 | #define MPLS_IPTUNNEL_DST 1 | |
96 | #endif | |
52d8f0d8 DS |
97 | |
98 | #ifndef NDA_MASTER | |
99 | #define NDA_MASTER 9 | |
100 | #endif | |
2232a77c | 101 | |
d5424e53 DS |
102 | #ifndef NTF_MASTER |
103 | #define NTF_MASTER 0x04 | |
104 | #endif | |
105 | ||
2232a77c | 106 | #ifndef NTF_SELF |
107 | #define NTF_SELF 0x02 | |
108 | #endif | |
109 | ||
110 | #ifndef NTF_EXT_LEARNED | |
111 | #define NTF_EXT_LEARNED 0x10 | |
112 | #endif | |
113 | ||
d5424e53 DS |
114 | #ifndef NDA_IFINDEX |
115 | #define NDA_IFINDEX 8 | |
116 | #endif | |
117 | ||
2232a77c | 118 | #ifndef NDA_VLAN |
119 | #define NDA_VLAN 5 | |
120 | #endif | |
40c7bdb0 | 121 | /* End of temporary definitions */ |
122 | ||
2232a77c | 123 | static vlanid_t filter_vlan = 0; |
124 | ||
d62a17ae | 125 | struct gw_family_t { |
126 | u_int16_t filler; | |
127 | u_int16_t family; | |
128 | union g_addr gate; | |
40c7bdb0 | 129 | }; |
130 | ||
8755598a DS |
131 | char ipv4_ll_buf[16] = "169.254.0.1"; |
132 | struct in_addr ipv4_ll; | |
133 | ||
134 | /* | |
135 | * The ipv4_ll data structure is used for all 5549 | |
136 | * additions to the kernel. Let's figure out the | |
137 | * correct value one time instead for every | |
138 | * install/remove of a 5549 type route | |
139 | */ | |
d62a17ae | 140 | void rt_netlink_init(void) |
8755598a | 141 | { |
d62a17ae | 142 | inet_pton(AF_INET, ipv4_ll_buf, &ipv4_ll); |
8755598a DS |
143 | } |
144 | ||
23b1f334 DD |
145 | static inline int is_selfroute(int proto) |
146 | { | |
d62a17ae | 147 | if ((proto == RTPROT_BGP) || (proto == RTPROT_OSPF) |
148 | || (proto == RTPROT_STATIC) || (proto == RTPROT_ZEBRA) | |
149 | || (proto == RTPROT_ISIS) || (proto == RTPROT_RIPNG) | |
150 | || (proto == RTPROT_NHRP) || (proto == RTPROT_EIGRP) | |
151 | || (proto == RTPROT_LDP) || (proto == RTPROT_BABEL)) { | |
152 | return 1; | |
153 | } | |
154 | ||
155 | return 0; | |
23b1f334 DD |
156 | } |
157 | ||
158 | static inline int get_rt_proto(int proto) | |
159 | { | |
d62a17ae | 160 | switch (proto) { |
161 | case ZEBRA_ROUTE_BABEL: | |
162 | proto = RTPROT_BABEL; | |
163 | break; | |
164 | case ZEBRA_ROUTE_BGP: | |
165 | proto = RTPROT_BGP; | |
166 | break; | |
167 | case ZEBRA_ROUTE_OSPF: | |
168 | case ZEBRA_ROUTE_OSPF6: | |
169 | proto = RTPROT_OSPF; | |
170 | break; | |
171 | case ZEBRA_ROUTE_STATIC: | |
172 | proto = RTPROT_STATIC; | |
173 | break; | |
174 | case ZEBRA_ROUTE_ISIS: | |
175 | proto = RTPROT_ISIS; | |
176 | break; | |
177 | case ZEBRA_ROUTE_RIP: | |
178 | proto = RTPROT_RIP; | |
179 | break; | |
180 | case ZEBRA_ROUTE_RIPNG: | |
181 | proto = RTPROT_RIPNG; | |
182 | break; | |
183 | case ZEBRA_ROUTE_NHRP: | |
184 | proto = RTPROT_NHRP; | |
185 | break; | |
186 | case ZEBRA_ROUTE_EIGRP: | |
187 | proto = RTPROT_EIGRP; | |
188 | break; | |
189 | case ZEBRA_ROUTE_LDP: | |
190 | proto = RTPROT_LDP; | |
191 | break; | |
192 | default: | |
193 | proto = RTPROT_ZEBRA; | |
194 | break; | |
195 | } | |
196 | ||
197 | return proto; | |
23b1f334 DD |
198 | } |
199 | ||
12f6fb97 DS |
200 | /* |
201 | Pending: create an efficient table_id (in a tree/hash) based lookup) | |
202 | */ | |
d62a17ae | 203 | static vrf_id_t vrf_lookup_by_table(u_int32_t table_id) |
12f6fb97 | 204 | { |
d62a17ae | 205 | struct vrf *vrf; |
206 | struct zebra_vrf *zvrf; | |
12f6fb97 | 207 | |
d62a17ae | 208 | RB_FOREACH(vrf, vrf_id_head, &vrfs_by_id) |
209 | { | |
210 | if ((zvrf = vrf->info) == NULL || (zvrf->table_id != table_id)) | |
211 | continue; | |
12f6fb97 | 212 | |
d62a17ae | 213 | return zvrf_id(zvrf); |
214 | } | |
12f6fb97 | 215 | |
d62a17ae | 216 | return VRF_DEFAULT; |
12f6fb97 DS |
217 | } |
218 | ||
718e3744 | 219 | /* Looking up routing table by netlink interface. */ |
d62a17ae | 220 | static int netlink_route_change_read_unicast(struct sockaddr_nl *snl, |
221 | struct nlmsghdr *h, ns_id_t ns_id, | |
222 | int startup) | |
718e3744 | 223 | { |
d62a17ae | 224 | int len; |
225 | struct rtmsg *rtm; | |
226 | struct rtattr *tb[RTA_MAX + 1]; | |
227 | u_char flags = 0; | |
228 | struct prefix p; | |
229 | struct prefix_ipv6 src_p; | |
230 | vrf_id_t vrf_id = VRF_DEFAULT; | |
231 | ||
232 | char anyaddr[16] = {0}; | |
233 | ||
234 | int index = 0; | |
235 | int table; | |
236 | int metric = 0; | |
237 | u_int32_t mtu = 0; | |
238 | ||
239 | void *dest = NULL; | |
240 | void *gate = NULL; | |
241 | void *prefsrc = NULL; /* IPv4 preferred source host address */ | |
242 | void *src = NULL; /* IPv6 srcdest source prefix */ | |
243 | ||
244 | rtm = NLMSG_DATA(h); | |
245 | ||
246 | if (startup && h->nlmsg_type != RTM_NEWROUTE) | |
247 | return 0; | |
248 | if (startup && rtm->rtm_type != RTN_UNICAST) | |
249 | return 0; | |
250 | ||
251 | len = h->nlmsg_len - NLMSG_LENGTH(sizeof(struct rtmsg)); | |
252 | if (len < 0) | |
253 | return -1; | |
254 | ||
255 | memset(tb, 0, sizeof tb); | |
256 | netlink_parse_rtattr(tb, RTA_MAX, RTM_RTA(rtm), len); | |
257 | ||
258 | if (rtm->rtm_flags & RTM_F_CLONED) | |
259 | return 0; | |
260 | if (rtm->rtm_protocol == RTPROT_REDIRECT) | |
261 | return 0; | |
262 | if (rtm->rtm_protocol == RTPROT_KERNEL) | |
263 | return 0; | |
264 | ||
265 | if (!startup && is_selfroute(rtm->rtm_protocol) | |
266 | && h->nlmsg_type == RTM_NEWROUTE) | |
267 | return 0; | |
268 | ||
269 | /* We don't care about change notifications for the MPLS table. */ | |
270 | /* TODO: Revisit this. */ | |
271 | if (rtm->rtm_family == AF_MPLS) | |
272 | return 0; | |
273 | ||
274 | /* Table corresponding to route. */ | |
275 | if (tb[RTA_TABLE]) | |
276 | table = *(int *)RTA_DATA(tb[RTA_TABLE]); | |
277 | else | |
278 | table = rtm->rtm_table; | |
279 | ||
280 | /* Map to VRF */ | |
281 | vrf_id = vrf_lookup_by_table(table); | |
282 | if (vrf_id == VRF_DEFAULT) { | |
283 | if (!is_zebra_valid_kernel_table(table) | |
284 | && !is_zebra_main_routing_table(table)) | |
285 | return 0; | |
286 | } | |
287 | ||
288 | /* Route which inserted by Zebra. */ | |
289 | if (is_selfroute(rtm->rtm_protocol)) | |
290 | flags |= ZEBRA_FLAG_SELFROUTE; | |
291 | ||
292 | if (tb[RTA_OIF]) | |
293 | index = *(int *)RTA_DATA(tb[RTA_OIF]); | |
294 | ||
295 | if (tb[RTA_DST]) | |
296 | dest = RTA_DATA(tb[RTA_DST]); | |
297 | else | |
298 | dest = anyaddr; | |
299 | ||
300 | if (tb[RTA_SRC]) | |
301 | src = RTA_DATA(tb[RTA_SRC]); | |
302 | else | |
303 | src = anyaddr; | |
304 | ||
305 | if (tb[RTA_PREFSRC]) | |
306 | prefsrc = RTA_DATA(tb[RTA_PREFSRC]); | |
307 | ||
308 | if (tb[RTA_GATEWAY]) | |
309 | gate = RTA_DATA(tb[RTA_GATEWAY]); | |
310 | ||
f19435a8 DS |
311 | if (tb[RTA_PRIORITY]) |
312 | metric = *(int *)RTA_DATA(tb[RTA_PRIORITY]); | |
d62a17ae | 313 | |
f19435a8 DS |
314 | if (tb[RTA_METRICS]) { |
315 | struct rtattr *mxrta[RTAX_MAX + 1]; | |
d62a17ae | 316 | |
f19435a8 DS |
317 | memset(mxrta, 0, sizeof mxrta); |
318 | netlink_parse_rtattr(mxrta, RTAX_MAX, | |
319 | RTA_DATA(tb[RTA_METRICS]), | |
320 | RTA_PAYLOAD(tb[RTA_METRICS])); | |
d62a17ae | 321 | |
f19435a8 DS |
322 | if (mxrta[RTAX_MTU]) |
323 | mtu = *(u_int32_t *)RTA_DATA(mxrta[RTAX_MTU]); | |
d62a17ae | 324 | } |
325 | ||
326 | if (rtm->rtm_family == AF_INET) { | |
327 | p.family = AF_INET; | |
328 | memcpy(&p.u.prefix4, dest, 4); | |
329 | p.prefixlen = rtm->rtm_dst_len; | |
330 | ||
331 | src_p.prefixlen = | |
332 | 0; // Forces debug below to not display anything | |
333 | } else if (rtm->rtm_family == AF_INET6) { | |
334 | p.family = AF_INET6; | |
335 | memcpy(&p.u.prefix6, dest, 16); | |
336 | p.prefixlen = rtm->rtm_dst_len; | |
337 | ||
338 | src_p.family = AF_INET6; | |
339 | memcpy(&src_p.prefix, src, 16); | |
340 | src_p.prefixlen = rtm->rtm_src_len; | |
341 | } | |
342 | ||
343 | if (rtm->rtm_src_len != 0) { | |
344 | char buf[PREFIX_STRLEN]; | |
345 | zlog_warn( | |
346 | "unsupported IPv[4|6] sourcedest route (dest %s vrf %u)", | |
347 | prefix2str(&p, buf, sizeof(buf)), vrf_id); | |
348 | return 0; | |
349 | } | |
350 | ||
351 | if (IS_ZEBRA_DEBUG_KERNEL) { | |
352 | char buf[PREFIX_STRLEN]; | |
353 | char buf2[PREFIX_STRLEN]; | |
354 | zlog_debug( | |
355 | "%s %s%s%s vrf %u", nl_msg_type_to_str(h->nlmsg_type), | |
356 | prefix2str(&p, buf, sizeof(buf)), | |
357 | src_p.prefixlen ? " from " : "", | |
358 | src_p.prefixlen ? prefix2str(&src_p, buf2, sizeof(buf2)) | |
359 | : "", | |
360 | vrf_id); | |
361 | } | |
362 | ||
363 | afi_t afi = AFI_IP; | |
364 | if (rtm->rtm_family == AF_INET6) | |
365 | afi = AFI_IP6; | |
366 | ||
367 | if (h->nlmsg_type == RTM_NEWROUTE) { | |
368 | if (!tb[RTA_MULTIPATH]) | |
369 | rib_add(afi, SAFI_UNICAST, vrf_id, ZEBRA_ROUTE_KERNEL, | |
370 | 0, flags, &p, NULL, gate, prefsrc, index, table, | |
371 | metric, mtu, 0); | |
372 | else { | |
373 | /* This is a multipath route */ | |
374 | ||
375 | struct route_entry *re; | |
376 | struct rtnexthop *rtnh = | |
377 | (struct rtnexthop *)RTA_DATA(tb[RTA_MULTIPATH]); | |
378 | ||
379 | len = RTA_PAYLOAD(tb[RTA_MULTIPATH]); | |
380 | ||
381 | re = XCALLOC(MTYPE_RE, sizeof(struct route_entry)); | |
382 | re->type = ZEBRA_ROUTE_KERNEL; | |
383 | re->distance = 0; | |
384 | re->flags = flags; | |
385 | re->metric = metric; | |
386 | re->mtu = mtu; | |
387 | re->vrf_id = vrf_id; | |
388 | re->table = table; | |
389 | re->nexthop_num = 0; | |
390 | re->uptime = time(NULL); | |
391 | ||
392 | for (;;) { | |
393 | if (len < (int)sizeof(*rtnh) | |
394 | || rtnh->rtnh_len > len) | |
395 | break; | |
396 | ||
397 | index = rtnh->rtnh_ifindex; | |
398 | gate = 0; | |
399 | if (rtnh->rtnh_len > sizeof(*rtnh)) { | |
400 | memset(tb, 0, sizeof(tb)); | |
401 | netlink_parse_rtattr( | |
402 | tb, RTA_MAX, RTNH_DATA(rtnh), | |
403 | rtnh->rtnh_len - sizeof(*rtnh)); | |
404 | if (tb[RTA_GATEWAY]) | |
405 | gate = RTA_DATA( | |
406 | tb[RTA_GATEWAY]); | |
407 | } | |
408 | ||
409 | if (gate) { | |
410 | if (rtm->rtm_family == AF_INET) { | |
411 | if (index) | |
412 | route_entry_nexthop_ipv4_ifindex_add( | |
413 | re, gate, | |
414 | prefsrc, index); | |
415 | else | |
416 | route_entry_nexthop_ipv4_add( | |
417 | re, gate, | |
418 | prefsrc); | |
419 | } else if (rtm->rtm_family | |
420 | == AF_INET6) { | |
421 | if (index) | |
422 | route_entry_nexthop_ipv6_ifindex_add( | |
423 | re, gate, | |
424 | index); | |
425 | else | |
426 | route_entry_nexthop_ipv6_add( | |
427 | re, gate); | |
428 | } | |
429 | } else | |
430 | route_entry_nexthop_ifindex_add(re, | |
431 | index); | |
432 | ||
433 | len -= NLMSG_ALIGN(rtnh->rtnh_len); | |
434 | rtnh = RTNH_NEXT(rtnh); | |
435 | } | |
436 | ||
437 | zserv_nexthop_num_warn(__func__, | |
438 | (const struct prefix *)&p, | |
439 | re->nexthop_num); | |
440 | if (re->nexthop_num == 0) | |
441 | XFREE(MTYPE_RE, re); | |
442 | else | |
443 | rib_add_multipath(AFI_IP, SAFI_UNICAST, &p, | |
444 | NULL, re); | |
445 | } | |
446 | } else { | |
447 | if (!tb[RTA_MULTIPATH]) | |
448 | rib_delete(afi, SAFI_UNICAST, vrf_id, | |
449 | ZEBRA_ROUTE_KERNEL, 0, flags, &p, NULL, gate, | |
f19435a8 | 450 | index, table, metric); |
d62a17ae | 451 | else { |
452 | struct rtnexthop *rtnh = | |
453 | (struct rtnexthop *)RTA_DATA(tb[RTA_MULTIPATH]); | |
454 | ||
455 | len = RTA_PAYLOAD(tb[RTA_MULTIPATH]); | |
456 | ||
457 | for (;;) { | |
458 | if (len < (int)sizeof(*rtnh) | |
459 | || rtnh->rtnh_len > len) | |
460 | break; | |
461 | ||
462 | gate = NULL; | |
463 | if (rtnh->rtnh_len > sizeof(*rtnh)) { | |
464 | memset(tb, 0, sizeof(tb)); | |
465 | netlink_parse_rtattr( | |
466 | tb, RTA_MAX, RTNH_DATA(rtnh), | |
467 | rtnh->rtnh_len - sizeof(*rtnh)); | |
468 | if (tb[RTA_GATEWAY]) | |
469 | gate = RTA_DATA( | |
470 | tb[RTA_GATEWAY]); | |
471 | } | |
472 | ||
473 | if (gate) | |
474 | rib_delete(afi, SAFI_UNICAST, vrf_id, | |
475 | ZEBRA_ROUTE_KERNEL, 0, flags, | |
476 | &p, NULL, gate, index, | |
f19435a8 | 477 | table, metric); |
d62a17ae | 478 | |
479 | len -= NLMSG_ALIGN(rtnh->rtnh_len); | |
480 | rtnh = RTNH_NEXT(rtnh); | |
481 | } | |
482 | } | |
483 | } | |
484 | ||
485 | return 0; | |
718e3744 | 486 | } |
487 | ||
e3be0432 DS |
488 | static struct mcast_route_data *mroute = NULL; |
489 | ||
d62a17ae | 490 | static int netlink_route_change_read_multicast(struct sockaddr_nl *snl, |
491 | struct nlmsghdr *h, | |
492 | ns_id_t ns_id, int startup) | |
565fdc75 | 493 | { |
d62a17ae | 494 | int len; |
495 | struct rtmsg *rtm; | |
496 | struct rtattr *tb[RTA_MAX + 1]; | |
497 | struct mcast_route_data *m; | |
498 | struct mcast_route_data mr; | |
499 | int iif = 0; | |
500 | int count; | |
501 | int oif[256]; | |
502 | int oif_count = 0; | |
503 | char sbuf[40]; | |
504 | char gbuf[40]; | |
505 | char oif_list[256] = "\0"; | |
506 | vrf_id_t vrf = ns_id; | |
43b5cc5e | 507 | int table; |
d62a17ae | 508 | |
509 | if (mroute) | |
510 | m = mroute; | |
511 | else { | |
512 | memset(&mr, 0, sizeof(mr)); | |
513 | m = &mr; | |
514 | } | |
515 | ||
516 | rtm = NLMSG_DATA(h); | |
517 | ||
518 | len = h->nlmsg_len - NLMSG_LENGTH(sizeof(struct rtmsg)); | |
519 | ||
520 | memset(tb, 0, sizeof tb); | |
521 | netlink_parse_rtattr(tb, RTA_MAX, RTM_RTA(rtm), len); | |
90d82769 | 522 | |
43b5cc5e DS |
523 | if (tb[RTA_TABLE]) |
524 | table = *(int *)RTA_DATA(tb[RTA_TABLE]); | |
525 | else | |
526 | table = rtm->rtm_table; | |
527 | ||
528 | vrf = vrf_lookup_by_table(table); | |
529 | ||
d62a17ae | 530 | if (tb[RTA_IIF]) |
531 | iif = *(int *)RTA_DATA(tb[RTA_IIF]); | |
532 | ||
533 | if (tb[RTA_SRC]) | |
bd8b9272 | 534 | m->sg.src = *(struct in_addr *)RTA_DATA(tb[RTA_SRC]); |
d62a17ae | 535 | |
536 | if (tb[RTA_DST]) | |
bd8b9272 | 537 | m->sg.grp = *(struct in_addr *)RTA_DATA(tb[RTA_DST]); |
d62a17ae | 538 | |
539 | if ((RTA_EXPIRES <= RTA_MAX) && tb[RTA_EXPIRES]) | |
540 | m->lastused = *(unsigned long long *)RTA_DATA(tb[RTA_EXPIRES]); | |
541 | ||
542 | if (tb[RTA_MULTIPATH]) { | |
543 | struct rtnexthop *rtnh = | |
544 | (struct rtnexthop *)RTA_DATA(tb[RTA_MULTIPATH]); | |
545 | ||
546 | len = RTA_PAYLOAD(tb[RTA_MULTIPATH]); | |
547 | for (;;) { | |
548 | if (len < (int)sizeof(*rtnh) || rtnh->rtnh_len > len) | |
549 | break; | |
550 | ||
551 | oif[oif_count] = rtnh->rtnh_ifindex; | |
552 | oif_count++; | |
553 | ||
554 | len -= NLMSG_ALIGN(rtnh->rtnh_len); | |
555 | rtnh = RTNH_NEXT(rtnh); | |
556 | } | |
557 | } | |
558 | ||
559 | if (IS_ZEBRA_DEBUG_KERNEL) { | |
560 | struct interface *ifp; | |
0af35d90 RW |
561 | strlcpy(sbuf, inet_ntoa(m->sg.src), sizeof(sbuf)); |
562 | strlcpy(gbuf, inet_ntoa(m->sg.grp), sizeof(gbuf)); | |
d62a17ae | 563 | for (count = 0; count < oif_count; count++) { |
564 | ifp = if_lookup_by_index(oif[count], vrf); | |
565 | char temp[256]; | |
566 | ||
567 | sprintf(temp, "%s ", ifp->name); | |
568 | strcat(oif_list, temp); | |
569 | } | |
43b5cc5e | 570 | struct zebra_vrf *zvrf = zebra_vrf_lookup_by_id(vrf); |
d62a17ae | 571 | ifp = if_lookup_by_index(iif, vrf); |
43b5cc5e DS |
572 | zlog_debug( |
573 | "MCAST VRF: %s(%d) %s (%s,%s) IIF: %s OIF: %s jiffies: %lld", | |
574 | zvrf->vrf->name, vrf, nl_msg_type_to_str(h->nlmsg_type), | |
575 | sbuf, gbuf, ifp->name, oif_list, m->lastused); | |
90d82769 | 576 | } |
d62a17ae | 577 | return 0; |
565fdc75 DS |
578 | } |
579 | ||
d62a17ae | 580 | int netlink_route_change(struct sockaddr_nl *snl, struct nlmsghdr *h, |
581 | ns_id_t ns_id, int startup) | |
565fdc75 | 582 | { |
d62a17ae | 583 | int len; |
584 | vrf_id_t vrf_id = ns_id; | |
585 | struct rtmsg *rtm; | |
586 | ||
587 | rtm = NLMSG_DATA(h); | |
588 | ||
589 | if (!(h->nlmsg_type == RTM_NEWROUTE || h->nlmsg_type == RTM_DELROUTE)) { | |
590 | /* If this is not route add/delete message print warning. */ | |
591 | zlog_warn("Kernel message: %d vrf %u\n", h->nlmsg_type, vrf_id); | |
592 | return 0; | |
593 | } | |
594 | ||
595 | /* Connected route. */ | |
596 | if (IS_ZEBRA_DEBUG_KERNEL) | |
597 | zlog_debug("%s %s %s proto %s vrf %u", | |
598 | nl_msg_type_to_str(h->nlmsg_type), | |
599 | nl_family_to_str(rtm->rtm_family), | |
600 | nl_rttype_to_str(rtm->rtm_type), | |
601 | nl_rtproto_to_str(rtm->rtm_protocol), vrf_id); | |
602 | ||
603 | /* We don't care about change notifications for the MPLS table. */ | |
604 | /* TODO: Revisit this. */ | |
605 | if (rtm->rtm_family == AF_MPLS) | |
606 | return 0; | |
607 | ||
608 | len = h->nlmsg_len - NLMSG_LENGTH(sizeof(struct rtmsg)); | |
609 | if (len < 0) | |
610 | return -1; | |
611 | ||
612 | switch (rtm->rtm_type) { | |
613 | case RTN_UNICAST: | |
614 | netlink_route_change_read_unicast(snl, h, ns_id, startup); | |
615 | break; | |
616 | case RTN_MULTICAST: | |
617 | netlink_route_change_read_multicast(snl, h, ns_id, startup); | |
618 | break; | |
619 | default: | |
620 | return 0; | |
621 | break; | |
622 | } | |
623 | ||
624 | return 0; | |
565fdc75 DS |
625 | } |
626 | ||
289602d7 | 627 | /* Request for specific route information from the kernel */ |
d62a17ae | 628 | static int netlink_request_route(struct zebra_ns *zns, int family, int type) |
289602d7 | 629 | { |
d62a17ae | 630 | struct { |
631 | struct nlmsghdr n; | |
632 | struct rtmsg rtm; | |
633 | } req; | |
634 | ||
635 | /* Form the request, specifying filter (rtattr) if needed. */ | |
636 | memset(&req, 0, sizeof(req)); | |
637 | req.n.nlmsg_type = type; | |
638 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)); | |
639 | req.rtm.rtm_family = family; | |
640 | ||
641 | return netlink_request(&zns->netlink_cmd, &req.n); | |
289602d7 | 642 | } |
643 | ||
718e3744 | 644 | /* Routing table read function using netlink interface. Only called |
645 | bootstrap time. */ | |
d62a17ae | 646 | int netlink_route_read(struct zebra_ns *zns) |
718e3744 | 647 | { |
d62a17ae | 648 | int ret; |
649 | ||
650 | /* Get IPv4 routing table. */ | |
651 | ret = netlink_request_route(zns, AF_INET, RTM_GETROUTE); | |
652 | if (ret < 0) | |
653 | return ret; | |
654 | ret = netlink_parse_info(netlink_route_change_read_unicast, | |
655 | &zns->netlink_cmd, zns, 0, 1); | |
656 | if (ret < 0) | |
657 | return ret; | |
658 | ||
659 | /* Get IPv6 routing table. */ | |
660 | ret = netlink_request_route(zns, AF_INET6, RTM_GETROUTE); | |
661 | if (ret < 0) | |
662 | return ret; | |
663 | ret = netlink_parse_info(netlink_route_change_read_unicast, | |
664 | &zns->netlink_cmd, zns, 0, 1); | |
665 | if (ret < 0) | |
666 | return ret; | |
667 | ||
668 | return 0; | |
718e3744 | 669 | } |
670 | ||
d62a17ae | 671 | static void _netlink_route_nl_add_gateway_info(u_char route_family, |
672 | u_char gw_family, | |
673 | struct nlmsghdr *nlmsg, | |
674 | size_t req_size, int bytelen, | |
675 | struct nexthop *nexthop) | |
40c7bdb0 | 676 | { |
d62a17ae | 677 | if (route_family == AF_MPLS) { |
678 | struct gw_family_t gw_fam; | |
679 | ||
680 | gw_fam.family = gw_family; | |
681 | if (gw_family == AF_INET) | |
682 | memcpy(&gw_fam.gate.ipv4, &nexthop->gate.ipv4, bytelen); | |
683 | else | |
684 | memcpy(&gw_fam.gate.ipv6, &nexthop->gate.ipv6, bytelen); | |
685 | addattr_l(nlmsg, req_size, RTA_VIA, &gw_fam.family, | |
686 | bytelen + 2); | |
687 | } else { | |
688 | if (gw_family == AF_INET) | |
689 | addattr_l(nlmsg, req_size, RTA_GATEWAY, | |
690 | &nexthop->gate.ipv4, bytelen); | |
691 | else | |
692 | addattr_l(nlmsg, req_size, RTA_GATEWAY, | |
693 | &nexthop->gate.ipv6, bytelen); | |
694 | } | |
40c7bdb0 | 695 | } |
696 | ||
d62a17ae | 697 | static void _netlink_route_rta_add_gateway_info(u_char route_family, |
698 | u_char gw_family, | |
699 | struct rtattr *rta, | |
700 | struct rtnexthop *rtnh, | |
701 | size_t req_size, int bytelen, | |
702 | struct nexthop *nexthop) | |
40c7bdb0 | 703 | { |
d62a17ae | 704 | if (route_family == AF_MPLS) { |
705 | struct gw_family_t gw_fam; | |
706 | ||
707 | gw_fam.family = gw_family; | |
708 | if (gw_family == AF_INET) | |
709 | memcpy(&gw_fam.gate.ipv4, &nexthop->gate.ipv4, bytelen); | |
710 | else | |
711 | memcpy(&gw_fam.gate.ipv6, &nexthop->gate.ipv6, bytelen); | |
712 | rta_addattr_l(rta, req_size, RTA_VIA, &gw_fam.family, | |
713 | bytelen + 2); | |
714 | rtnh->rtnh_len += RTA_LENGTH(bytelen + 2); | |
715 | } else { | |
716 | if (gw_family == AF_INET) | |
717 | rta_addattr_l(rta, req_size, RTA_GATEWAY, | |
718 | &nexthop->gate.ipv4, bytelen); | |
719 | else | |
720 | rta_addattr_l(rta, req_size, RTA_GATEWAY, | |
721 | &nexthop->gate.ipv6, bytelen); | |
722 | rtnh->rtnh_len += sizeof(struct rtattr) + bytelen; | |
723 | } | |
40c7bdb0 | 724 | } |
725 | ||
fa713d9e CF |
726 | /* This function takes a nexthop as argument and adds |
727 | * the appropriate netlink attributes to an existing | |
728 | * netlink message. | |
729 | * | |
730 | * @param routedesc: Human readable description of route type | |
731 | * (direct/recursive, single-/multipath) | |
732 | * @param bytelen: Length of addresses in bytes. | |
733 | * @param nexthop: Nexthop information | |
734 | * @param nlmsg: nlmsghdr structure to fill in. | |
735 | * @param req_size: The size allocated for the message. | |
736 | */ | |
d62a17ae | 737 | static void _netlink_route_build_singlepath(const char *routedesc, int bytelen, |
738 | struct nexthop *nexthop, | |
739 | struct nlmsghdr *nlmsg, | |
740 | struct rtmsg *rtmsg, | |
741 | size_t req_size, int cmd) | |
fa713d9e | 742 | { |
d62a17ae | 743 | struct nexthop_label *nh_label; |
744 | mpls_lse_t out_lse[MPLS_MAX_LABELS]; | |
745 | char label_buf[100]; | |
746 | ||
747 | /* | |
748 | * label_buf is *only* currently used within debugging. | |
749 | * As such when we assign it we are guarding it inside | |
750 | * a debug test. If you want to change this make sure | |
751 | * you fix this assumption | |
752 | */ | |
753 | label_buf[0] = '\0'; | |
754 | /* outgoing label - either as NEWDST (in the case of LSR) or as ENCAP | |
755 | * (in the case of LER) | |
756 | */ | |
757 | nh_label = nexthop->nh_label; | |
758 | if (rtmsg->rtm_family == AF_MPLS) { | |
759 | assert(nh_label); | |
760 | assert(nh_label->num_labels == 1); | |
761 | } | |
762 | ||
763 | if (nh_label && nh_label->num_labels) { | |
764 | int i, num_labels = 0; | |
765 | u_int32_t bos; | |
766 | char label_buf1[20]; | |
767 | ||
768 | for (i = 0; i < nh_label->num_labels; i++) { | |
769 | if (nh_label->label[i] != MPLS_IMP_NULL_LABEL) { | |
770 | bos = ((i == (nh_label->num_labels - 1)) ? 1 | |
771 | : 0); | |
772 | out_lse[i] = mpls_lse_encode(nh_label->label[i], | |
773 | 0, 0, bos); | |
774 | if (IS_ZEBRA_DEBUG_KERNEL) { | |
775 | if (!num_labels) | |
776 | sprintf(label_buf, "label %d", | |
777 | nh_label->label[i]); | |
778 | else { | |
779 | sprintf(label_buf1, "/%d", | |
780 | nh_label->label[i]); | |
781 | strcat(label_buf, label_buf1); | |
782 | } | |
783 | } | |
784 | num_labels++; | |
785 | } | |
786 | } | |
787 | if (num_labels) { | |
788 | if (rtmsg->rtm_family == AF_MPLS) | |
789 | addattr_l(nlmsg, req_size, RTA_NEWDST, &out_lse, | |
790 | num_labels * sizeof(mpls_lse_t)); | |
791 | else { | |
792 | struct rtattr *nest; | |
793 | u_int16_t encap = LWTUNNEL_ENCAP_MPLS; | |
794 | ||
795 | addattr_l(nlmsg, req_size, RTA_ENCAP_TYPE, | |
796 | &encap, sizeof(u_int16_t)); | |
797 | nest = addattr_nest(nlmsg, req_size, RTA_ENCAP); | |
798 | addattr_l(nlmsg, req_size, MPLS_IPTUNNEL_DST, | |
799 | &out_lse, | |
800 | num_labels * sizeof(mpls_lse_t)); | |
801 | addattr_nest_end(nlmsg, nest); | |
802 | } | |
66d42727 | 803 | } |
0aabccc0 | 804 | } |
fa713d9e | 805 | |
d62a17ae | 806 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ONLINK)) |
807 | rtmsg->rtm_flags |= RTNH_F_ONLINK; | |
808 | ||
809 | if (rtmsg->rtm_family == AF_INET | |
810 | && (nexthop->type == NEXTHOP_TYPE_IPV6 | |
811 | || nexthop->type == NEXTHOP_TYPE_IPV6_IFINDEX)) { | |
812 | rtmsg->rtm_flags |= RTNH_F_ONLINK; | |
813 | addattr_l(nlmsg, req_size, RTA_GATEWAY, &ipv4_ll, 4); | |
814 | addattr32(nlmsg, req_size, RTA_OIF, nexthop->ifindex); | |
815 | ||
816 | if (nexthop->rmap_src.ipv4.s_addr && (cmd == RTM_NEWROUTE)) | |
817 | addattr_l(nlmsg, req_size, RTA_PREFSRC, | |
818 | &nexthop->rmap_src.ipv4, bytelen); | |
819 | else if (nexthop->src.ipv4.s_addr && (cmd == RTM_NEWROUTE)) | |
820 | addattr_l(nlmsg, req_size, RTA_PREFSRC, | |
821 | &nexthop->src.ipv4, bytelen); | |
822 | ||
823 | if (IS_ZEBRA_DEBUG_KERNEL) | |
824 | zlog_debug( | |
825 | " 5549: _netlink_route_build_singlepath() (%s): " | |
826 | "nexthop via %s %s if %u", | |
827 | routedesc, ipv4_ll_buf, label_buf, | |
828 | nexthop->ifindex); | |
829 | return; | |
0aabccc0 DD |
830 | } |
831 | ||
d62a17ae | 832 | if (nexthop->type == NEXTHOP_TYPE_IPV4 |
833 | || nexthop->type == NEXTHOP_TYPE_IPV4_IFINDEX) { | |
834 | /* Send deletes to the kernel without specifying the next-hop */ | |
835 | if (cmd != RTM_DELROUTE) | |
836 | _netlink_route_nl_add_gateway_info( | |
837 | rtmsg->rtm_family, AF_INET, nlmsg, req_size, | |
838 | bytelen, nexthop); | |
839 | ||
840 | if (cmd == RTM_NEWROUTE) { | |
841 | if (nexthop->rmap_src.ipv4.s_addr) | |
842 | addattr_l(nlmsg, req_size, RTA_PREFSRC, | |
843 | &nexthop->rmap_src.ipv4, bytelen); | |
844 | else if (nexthop->src.ipv4.s_addr) | |
845 | addattr_l(nlmsg, req_size, RTA_PREFSRC, | |
846 | &nexthop->src.ipv4, bytelen); | |
847 | } | |
848 | ||
849 | if (IS_ZEBRA_DEBUG_KERNEL) | |
850 | zlog_debug( | |
851 | "netlink_route_multipath() (%s): " | |
852 | "nexthop via %s %s if %u", | |
853 | routedesc, inet_ntoa(nexthop->gate.ipv4), | |
854 | label_buf, nexthop->ifindex); | |
0aabccc0 | 855 | } |
fa713d9e | 856 | |
d62a17ae | 857 | if (nexthop->type == NEXTHOP_TYPE_IPV6 |
858 | || nexthop->type == NEXTHOP_TYPE_IPV6_IFINDEX) { | |
859 | _netlink_route_nl_add_gateway_info(rtmsg->rtm_family, AF_INET6, | |
860 | nlmsg, req_size, bytelen, | |
861 | nexthop); | |
862 | ||
863 | if (cmd == RTM_NEWROUTE) { | |
864 | if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->rmap_src.ipv6)) | |
865 | addattr_l(nlmsg, req_size, RTA_PREFSRC, | |
866 | &nexthop->rmap_src.ipv6, bytelen); | |
867 | else if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->src.ipv6)) | |
868 | addattr_l(nlmsg, req_size, RTA_PREFSRC, | |
869 | &nexthop->src.ipv6, bytelen); | |
870 | } | |
fa713d9e | 871 | |
d62a17ae | 872 | if (IS_ZEBRA_DEBUG_KERNEL) |
873 | zlog_debug( | |
874 | "netlink_route_multipath() (%s): " | |
875 | "nexthop via %s %s if %u", | |
876 | routedesc, inet6_ntoa(nexthop->gate.ipv6), | |
877 | label_buf, nexthop->ifindex); | |
878 | } | |
879 | if (nexthop->type == NEXTHOP_TYPE_IFINDEX | |
880 | || nexthop->type == NEXTHOP_TYPE_IPV4_IFINDEX) { | |
881 | addattr32(nlmsg, req_size, RTA_OIF, nexthop->ifindex); | |
882 | ||
883 | if (cmd == RTM_NEWROUTE) { | |
884 | if (nexthop->rmap_src.ipv4.s_addr) | |
885 | addattr_l(nlmsg, req_size, RTA_PREFSRC, | |
886 | &nexthop->rmap_src.ipv4, bytelen); | |
887 | else if (nexthop->src.ipv4.s_addr) | |
888 | addattr_l(nlmsg, req_size, RTA_PREFSRC, | |
889 | &nexthop->src.ipv4, bytelen); | |
890 | } | |
fa713d9e | 891 | |
d62a17ae | 892 | if (IS_ZEBRA_DEBUG_KERNEL) |
893 | zlog_debug( | |
894 | "netlink_route_multipath() (%s): " | |
895 | "nexthop via if %u", | |
896 | routedesc, nexthop->ifindex); | |
0aabccc0 DD |
897 | } |
898 | ||
d62a17ae | 899 | if (nexthop->type == NEXTHOP_TYPE_IPV6_IFINDEX) { |
900 | addattr32(nlmsg, req_size, RTA_OIF, nexthop->ifindex); | |
901 | ||
902 | if (cmd == RTM_NEWROUTE) { | |
903 | if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->rmap_src.ipv6)) | |
904 | addattr_l(nlmsg, req_size, RTA_PREFSRC, | |
905 | &nexthop->rmap_src.ipv6, bytelen); | |
906 | else if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->src.ipv6)) | |
907 | addattr_l(nlmsg, req_size, RTA_PREFSRC, | |
908 | &nexthop->src.ipv6, bytelen); | |
909 | } | |
910 | ||
911 | if (IS_ZEBRA_DEBUG_KERNEL) | |
912 | zlog_debug( | |
913 | "netlink_route_multipath() (%s): " | |
914 | "nexthop via if %u", | |
915 | routedesc, nexthop->ifindex); | |
916 | } | |
fa713d9e CF |
917 | } |
918 | ||
919 | /* This function takes a nexthop as argument and | |
920 | * appends to the given rtattr/rtnexthop pair the | |
921 | * representation of the nexthop. If the nexthop | |
922 | * defines a preferred source, the src parameter | |
923 | * will be modified to point to that src, otherwise | |
924 | * it will be kept unmodified. | |
925 | * | |
926 | * @param routedesc: Human readable description of route type | |
927 | * (direct/recursive, single-/multipath) | |
928 | * @param bytelen: Length of addresses in bytes. | |
929 | * @param nexthop: Nexthop information | |
930 | * @param rta: rtnetlink attribute structure | |
931 | * @param rtnh: pointer to an rtnetlink nexthop structure | |
932 | * @param src: pointer pointing to a location where | |
933 | * the prefsrc should be stored. | |
934 | */ | |
d62a17ae | 935 | static void _netlink_route_build_multipath(const char *routedesc, int bytelen, |
936 | struct nexthop *nexthop, | |
937 | struct rtattr *rta, | |
938 | struct rtnexthop *rtnh, | |
939 | struct rtmsg *rtmsg, | |
940 | union g_addr **src) | |
fa713d9e | 941 | { |
d62a17ae | 942 | struct nexthop_label *nh_label; |
943 | mpls_lse_t out_lse[MPLS_MAX_LABELS]; | |
944 | char label_buf[100]; | |
945 | ||
946 | rtnh->rtnh_len = sizeof(*rtnh); | |
947 | rtnh->rtnh_flags = 0; | |
948 | rtnh->rtnh_hops = 0; | |
949 | rta->rta_len += rtnh->rtnh_len; | |
950 | ||
951 | /* | |
952 | * label_buf is *only* currently used within debugging. | |
953 | * As such when we assign it we are guarding it inside | |
954 | * a debug test. If you want to change this make sure | |
955 | * you fix this assumption | |
956 | */ | |
957 | label_buf[0] = '\0'; | |
958 | /* outgoing label - either as NEWDST (in the case of LSR) or as ENCAP | |
959 | * (in the case of LER) | |
960 | */ | |
961 | nh_label = nexthop->nh_label; | |
962 | if (rtmsg->rtm_family == AF_MPLS) { | |
963 | assert(nh_label); | |
964 | assert(nh_label->num_labels == 1); | |
965 | } | |
966 | ||
967 | if (nh_label && nh_label->num_labels) { | |
968 | int i, num_labels = 0; | |
969 | u_int32_t bos; | |
970 | char label_buf1[20]; | |
971 | ||
972 | for (i = 0; i < nh_label->num_labels; i++) { | |
973 | if (nh_label->label[i] != MPLS_IMP_NULL_LABEL) { | |
974 | bos = ((i == (nh_label->num_labels - 1)) ? 1 | |
975 | : 0); | |
976 | out_lse[i] = mpls_lse_encode(nh_label->label[i], | |
977 | 0, 0, bos); | |
978 | if (IS_ZEBRA_DEBUG_KERNEL) { | |
979 | if (!num_labels) | |
980 | sprintf(label_buf, "label %d", | |
981 | nh_label->label[i]); | |
982 | else { | |
983 | sprintf(label_buf1, "/%d", | |
984 | nh_label->label[i]); | |
985 | strcat(label_buf, label_buf1); | |
986 | } | |
987 | } | |
988 | num_labels++; | |
989 | } | |
990 | } | |
991 | if (num_labels) { | |
992 | if (rtmsg->rtm_family == AF_MPLS) { | |
993 | rta_addattr_l(rta, NL_PKT_BUF_SIZE, RTA_NEWDST, | |
994 | &out_lse, | |
995 | num_labels * sizeof(mpls_lse_t)); | |
996 | rtnh->rtnh_len += RTA_LENGTH( | |
997 | num_labels * sizeof(mpls_lse_t)); | |
998 | } else { | |
999 | struct rtattr *nest; | |
1000 | u_int16_t encap = LWTUNNEL_ENCAP_MPLS; | |
1001 | int len = rta->rta_len; | |
1002 | ||
1003 | rta_addattr_l(rta, NL_PKT_BUF_SIZE, | |
1004 | RTA_ENCAP_TYPE, &encap, | |
1005 | sizeof(u_int16_t)); | |
1006 | nest = rta_nest(rta, NL_PKT_BUF_SIZE, | |
1007 | RTA_ENCAP); | |
1008 | rta_addattr_l(rta, NL_PKT_BUF_SIZE, | |
1009 | MPLS_IPTUNNEL_DST, &out_lse, | |
1010 | num_labels * sizeof(mpls_lse_t)); | |
1011 | rta_nest_end(rta, nest); | |
1012 | rtnh->rtnh_len += rta->rta_len - len; | |
1013 | } | |
66d42727 | 1014 | } |
d62a17ae | 1015 | } |
1016 | ||
1017 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ONLINK)) | |
1018 | rtnh->rtnh_flags |= RTNH_F_ONLINK; | |
1019 | ||
1020 | if (rtmsg->rtm_family == AF_INET | |
1021 | && (nexthop->type == NEXTHOP_TYPE_IPV6 | |
1022 | || nexthop->type == NEXTHOP_TYPE_IPV6_IFINDEX)) { | |
1023 | bytelen = 4; | |
1024 | rtnh->rtnh_flags |= RTNH_F_ONLINK; | |
1025 | rta_addattr_l(rta, NL_PKT_BUF_SIZE, RTA_GATEWAY, &ipv4_ll, | |
1026 | bytelen); | |
1027 | rtnh->rtnh_len += sizeof(struct rtattr) + bytelen; | |
1028 | rtnh->rtnh_ifindex = nexthop->ifindex; | |
1029 | ||
1030 | if (nexthop->rmap_src.ipv4.s_addr) | |
1031 | *src = &nexthop->rmap_src; | |
1032 | else if (nexthop->src.ipv4.s_addr) | |
1033 | *src = &nexthop->src; | |
1034 | ||
1035 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1036 | zlog_debug( | |
1037 | " 5549: netlink_route_build_multipath() (%s): " | |
1038 | "nexthop via %s %s if %u", | |
1039 | routedesc, ipv4_ll_buf, label_buf, | |
1040 | nexthop->ifindex); | |
1041 | return; | |
1042 | } | |
1043 | ||
1044 | if (nexthop->type == NEXTHOP_TYPE_IPV4 | |
1045 | || nexthop->type == NEXTHOP_TYPE_IPV4_IFINDEX) { | |
1046 | _netlink_route_rta_add_gateway_info(rtmsg->rtm_family, AF_INET, | |
1047 | rta, rtnh, NL_PKT_BUF_SIZE, | |
1048 | bytelen, nexthop); | |
1049 | if (nexthop->rmap_src.ipv4.s_addr) | |
1050 | *src = &nexthop->rmap_src; | |
1051 | else if (nexthop->src.ipv4.s_addr) | |
1052 | *src = &nexthop->src; | |
1053 | ||
1054 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1055 | zlog_debug( | |
1056 | "netlink_route_multipath() (%s): " | |
1057 | "nexthop via %s %s if %u", | |
1058 | routedesc, inet_ntoa(nexthop->gate.ipv4), | |
1059 | label_buf, nexthop->ifindex); | |
1060 | } | |
1061 | if (nexthop->type == NEXTHOP_TYPE_IPV6 | |
1062 | || nexthop->type == NEXTHOP_TYPE_IPV6_IFINDEX) { | |
1063 | _netlink_route_rta_add_gateway_info(rtmsg->rtm_family, AF_INET6, | |
1064 | rta, rtnh, NL_PKT_BUF_SIZE, | |
1065 | bytelen, nexthop); | |
1066 | ||
1067 | if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->rmap_src.ipv6)) | |
1068 | *src = &nexthop->rmap_src; | |
1069 | else if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->src.ipv6)) | |
1070 | *src = &nexthop->src; | |
1071 | ||
1072 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1073 | zlog_debug( | |
1074 | "netlink_route_multipath() (%s): " | |
1075 | "nexthop via %s %s if %u", | |
1076 | routedesc, inet6_ntoa(nexthop->gate.ipv6), | |
1077 | label_buf, nexthop->ifindex); | |
1078 | } | |
1079 | /* ifindex */ | |
1080 | if (nexthop->type == NEXTHOP_TYPE_IPV4_IFINDEX | |
1081 | || nexthop->type == NEXTHOP_TYPE_IFINDEX) { | |
1082 | rtnh->rtnh_ifindex = nexthop->ifindex; | |
1083 | ||
1084 | if (nexthop->rmap_src.ipv4.s_addr) | |
1085 | *src = &nexthop->rmap_src; | |
1086 | else if (nexthop->src.ipv4.s_addr) | |
1087 | *src = &nexthop->src; | |
1088 | ||
1089 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1090 | zlog_debug( | |
1091 | "netlink_route_multipath() (%s): " | |
1092 | "nexthop via if %u", | |
1093 | routedesc, nexthop->ifindex); | |
1094 | } else if (nexthop->type == NEXTHOP_TYPE_IPV6_IFINDEX) { | |
1095 | rtnh->rtnh_ifindex = nexthop->ifindex; | |
1096 | ||
1097 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1098 | zlog_debug( | |
1099 | "netlink_route_multipath() (%s): " | |
1100 | "nexthop via if %u", | |
1101 | routedesc, nexthop->ifindex); | |
1102 | } else { | |
1103 | rtnh->rtnh_ifindex = 0; | |
1104 | } | |
fa713d9e CF |
1105 | } |
1106 | ||
d62a17ae | 1107 | static inline void _netlink_mpls_build_singlepath(const char *routedesc, |
1108 | zebra_nhlfe_t *nhlfe, | |
1109 | struct nlmsghdr *nlmsg, | |
1110 | struct rtmsg *rtmsg, | |
1111 | size_t req_size, int cmd) | |
40c7bdb0 | 1112 | { |
d62a17ae | 1113 | int bytelen; |
1114 | u_char family; | |
40c7bdb0 | 1115 | |
d62a17ae | 1116 | family = NHLFE_FAMILY(nhlfe); |
1117 | bytelen = (family == AF_INET ? 4 : 16); | |
1118 | _netlink_route_build_singlepath(routedesc, bytelen, nhlfe->nexthop, | |
1119 | nlmsg, rtmsg, req_size, cmd); | |
40c7bdb0 | 1120 | } |
1121 | ||
1122 | ||
1123 | static inline void | |
d62a17ae | 1124 | _netlink_mpls_build_multipath(const char *routedesc, zebra_nhlfe_t *nhlfe, |
1125 | struct rtattr *rta, struct rtnexthop *rtnh, | |
1126 | struct rtmsg *rtmsg, union g_addr **src) | |
40c7bdb0 | 1127 | { |
d62a17ae | 1128 | int bytelen; |
1129 | u_char family; | |
40c7bdb0 | 1130 | |
d62a17ae | 1131 | family = NHLFE_FAMILY(nhlfe); |
1132 | bytelen = (family == AF_INET ? 4 : 16); | |
1133 | _netlink_route_build_multipath(routedesc, bytelen, nhlfe->nexthop, rta, | |
1134 | rtnh, rtmsg, src); | |
40c7bdb0 | 1135 | } |
1136 | ||
1137 | ||
fa713d9e CF |
1138 | /* Log debug information for netlink_route_multipath |
1139 | * if debug logging is enabled. | |
1140 | * | |
1141 | * @param cmd: Netlink command which is to be processed | |
1142 | * @param p: Prefix for which the change is due | |
1143 | * @param nexthop: Nexthop which is currently processed | |
1144 | * @param routedesc: Semantic annotation for nexthop | |
1145 | * (recursive, multipath, etc.) | |
1146 | * @param family: Address family which the change concerns | |
1147 | */ | |
d62a17ae | 1148 | static void _netlink_route_debug(int cmd, struct prefix *p, |
1149 | struct nexthop *nexthop, const char *routedesc, | |
1150 | int family, struct zebra_vrf *zvrf) | |
fa713d9e | 1151 | { |
d62a17ae | 1152 | if (IS_ZEBRA_DEBUG_KERNEL) { |
1153 | char buf[PREFIX_STRLEN]; | |
1154 | zlog_debug( | |
1155 | "netlink_route_multipath() (%s): %s %s vrf %u type %s", | |
1156 | routedesc, nl_msg_type_to_str(cmd), | |
1157 | prefix2str(p, buf, sizeof(buf)), zvrf_id(zvrf), | |
1158 | (nexthop) ? nexthop_type_to_str(nexthop->type) : "UNK"); | |
1159 | } | |
1160 | } | |
1161 | ||
1162 | static void _netlink_mpls_debug(int cmd, u_int32_t label, const char *routedesc) | |
40c7bdb0 | 1163 | { |
d62a17ae | 1164 | if (IS_ZEBRA_DEBUG_KERNEL) |
1165 | zlog_debug("netlink_mpls_multipath() (%s): %s %u/20", routedesc, | |
1166 | nl_msg_type_to_str(cmd), label); | |
fa713d9e CF |
1167 | } |
1168 | ||
d62a17ae | 1169 | static int netlink_neigh_update(int cmd, int ifindex, uint32_t addr, char *lla, |
1170 | int llalen) | |
5c610faf | 1171 | { |
d62a17ae | 1172 | struct { |
1173 | struct nlmsghdr n; | |
1174 | struct ndmsg ndm; | |
1175 | char buf[256]; | |
1176 | } req; | |
5c610faf | 1177 | |
d62a17ae | 1178 | struct zebra_ns *zns = zebra_ns_lookup(NS_DEFAULT); |
8f7d9fc0 | 1179 | |
d62a17ae | 1180 | memset(&req.n, 0, sizeof(req.n)); |
1181 | memset(&req.ndm, 0, sizeof(req.ndm)); | |
5c610faf | 1182 | |
d62a17ae | 1183 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)); |
1184 | req.n.nlmsg_flags = NLM_F_CREATE | NLM_F_REQUEST; | |
1185 | req.n.nlmsg_type = cmd; // RTM_NEWNEIGH or RTM_DELNEIGH | |
1186 | req.n.nlmsg_pid = zns->netlink_cmd.snl.nl_pid; | |
a55ba23f | 1187 | |
d62a17ae | 1188 | req.ndm.ndm_family = AF_INET; |
1189 | req.ndm.ndm_state = NUD_PERMANENT; | |
1190 | req.ndm.ndm_ifindex = ifindex; | |
1191 | req.ndm.ndm_type = RTN_UNICAST; | |
5c610faf | 1192 | |
d62a17ae | 1193 | addattr_l(&req.n, sizeof(req), NDA_DST, &addr, 4); |
1194 | addattr_l(&req.n, sizeof(req), NDA_LLADDR, lla, llalen); | |
5c610faf | 1195 | |
d62a17ae | 1196 | return netlink_talk(netlink_talk_filter, &req.n, &zns->netlink_cmd, zns, |
1197 | 0); | |
5c610faf DS |
1198 | } |
1199 | ||
718e3744 | 1200 | /* Routing table change via netlink interface. */ |
6ae24471 | 1201 | /* Update flag indicates whether this is a "replace" or not. */ |
d62a17ae | 1202 | static int netlink_route_multipath(int cmd, struct prefix *p, |
1203 | struct prefix *src_p, struct route_entry *re, | |
1204 | int update) | |
718e3744 | 1205 | { |
d62a17ae | 1206 | int bytelen; |
1207 | struct sockaddr_nl snl; | |
1208 | struct nexthop *nexthop = NULL; | |
1209 | unsigned int nexthop_num; | |
1210 | int discard; | |
1211 | int family = PREFIX_FAMILY(p); | |
1212 | const char *routedesc; | |
1213 | int setsrc = 0; | |
1214 | union g_addr src; | |
1215 | ||
1216 | struct { | |
1217 | struct nlmsghdr n; | |
1218 | struct rtmsg r; | |
1219 | char buf[NL_PKT_BUF_SIZE]; | |
1220 | } req; | |
1221 | ||
1222 | struct zebra_ns *zns = zebra_ns_lookup(NS_DEFAULT); | |
1223 | struct zebra_vrf *zvrf = vrf_info_lookup(re->vrf_id); | |
1224 | ||
1225 | memset(&req, 0, sizeof req - NL_PKT_BUF_SIZE); | |
1226 | ||
1227 | bytelen = (family == AF_INET ? 4 : 16); | |
1228 | ||
1229 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)); | |
1230 | req.n.nlmsg_flags = NLM_F_CREATE | NLM_F_REQUEST; | |
1231 | if ((cmd == RTM_NEWROUTE) && update) | |
1232 | req.n.nlmsg_flags |= NLM_F_REPLACE; | |
1233 | req.n.nlmsg_type = cmd; | |
1234 | req.n.nlmsg_pid = zns->netlink_cmd.snl.nl_pid; | |
1235 | ||
1236 | req.r.rtm_family = family; | |
1237 | req.r.rtm_dst_len = p->prefixlen; | |
1238 | req.r.rtm_src_len = src_p ? src_p->prefixlen : 0; | |
1239 | req.r.rtm_protocol = get_rt_proto(re->type); | |
1240 | req.r.rtm_scope = RT_SCOPE_UNIVERSE; | |
1241 | ||
1242 | if ((re->flags & ZEBRA_FLAG_BLACKHOLE) | |
1243 | || (re->flags & ZEBRA_FLAG_REJECT)) | |
1244 | discard = 1; | |
1245 | else | |
1246 | discard = 0; | |
1247 | ||
1248 | if (cmd == RTM_NEWROUTE) { | |
1249 | if (discard) { | |
1250 | if (re->flags & ZEBRA_FLAG_BLACKHOLE) | |
1251 | req.r.rtm_type = RTN_BLACKHOLE; | |
1252 | else if (re->flags & ZEBRA_FLAG_REJECT) | |
1253 | req.r.rtm_type = RTN_UNREACHABLE; | |
1254 | else | |
1255 | assert(RTN_BLACKHOLE | |
1256 | != RTN_UNREACHABLE); /* false */ | |
1257 | } else | |
1258 | req.r.rtm_type = RTN_UNICAST; | |
0aabccc0 | 1259 | } |
0aabccc0 | 1260 | |
d62a17ae | 1261 | addattr_l(&req.n, sizeof req, RTA_DST, &p->u.prefix, bytelen); |
1262 | if (src_p) | |
1263 | addattr_l(&req.n, sizeof req, RTA_SRC, &src_p->u.prefix, | |
1264 | bytelen); | |
1265 | ||
1266 | /* Metric. */ | |
1267 | /* Hardcode the metric for all routes coming from zebra. Metric isn't | |
1268 | * used | |
1269 | * either by the kernel or by zebra. Its purely for calculating best | |
1270 | * path(s) | |
1271 | * by the routing protocol and for communicating with protocol peers. | |
1272 | */ | |
1273 | addattr32(&req.n, sizeof req, RTA_PRIORITY, NL_DEFAULT_ROUTE_METRIC); | |
1274 | ||
1275 | /* Table corresponding to this route. */ | |
1276 | if (re->table < 256) | |
1277 | req.r.rtm_table = re->table; | |
1278 | else { | |
1279 | req.r.rtm_table = RT_TABLE_UNSPEC; | |
1280 | addattr32(&req.n, sizeof req, RTA_TABLE, re->table); | |
0aabccc0 | 1281 | } |
718e3744 | 1282 | |
d62a17ae | 1283 | if (re->mtu || re->nexthop_mtu) { |
1284 | char buf[NL_PKT_BUF_SIZE]; | |
1285 | struct rtattr *rta = (void *)buf; | |
1286 | u_int32_t mtu = re->mtu; | |
1287 | if (!mtu || (re->nexthop_mtu && re->nexthop_mtu < mtu)) | |
1288 | mtu = re->nexthop_mtu; | |
1289 | rta->rta_type = RTA_METRICS; | |
1290 | rta->rta_len = RTA_LENGTH(0); | |
1291 | rta_addattr_l(rta, NL_PKT_BUF_SIZE, RTAX_MTU, &mtu, sizeof mtu); | |
1292 | addattr_l(&req.n, NL_PKT_BUF_SIZE, RTA_METRICS, RTA_DATA(rta), | |
1293 | RTA_PAYLOAD(rta)); | |
1294 | } | |
1295 | ||
1296 | if (discard) { | |
1297 | if (cmd == RTM_NEWROUTE) | |
1298 | for (ALL_NEXTHOPS(re->nexthop, nexthop)) { | |
1299 | /* We shouldn't encounter recursive nexthops on | |
1300 | * discard routes, | |
1301 | * but it is probably better to handle that case | |
1302 | * correctly anyway. | |
1303 | */ | |
1304 | if (CHECK_FLAG(nexthop->flags, | |
1305 | NEXTHOP_FLAG_RECURSIVE)) | |
1306 | continue; | |
1307 | } | |
1308 | goto skip; | |
1309 | } | |
1310 | ||
1311 | /* Count overall nexthops so we can decide whether to use singlepath | |
1312 | * or multipath case. */ | |
1313 | nexthop_num = 0; | |
1314 | for (ALL_NEXTHOPS(re->nexthop, nexthop)) { | |
1315 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_RECURSIVE)) | |
1316 | continue; | |
1317 | if (cmd == RTM_NEWROUTE | |
1318 | && !CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE)) | |
1319 | continue; | |
1320 | if (cmd == RTM_DELROUTE | |
1321 | && !CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB)) | |
1322 | continue; | |
1323 | ||
1324 | nexthop_num++; | |
1325 | } | |
1326 | ||
1327 | /* Singlepath case. */ | |
1328 | if (nexthop_num == 1 || multipath_num == 1) { | |
1329 | nexthop_num = 0; | |
1330 | for (ALL_NEXTHOPS(re->nexthop, nexthop)) { | |
1331 | if (CHECK_FLAG(nexthop->flags, | |
1332 | NEXTHOP_FLAG_RECURSIVE)) { | |
1333 | if (!setsrc) { | |
1334 | if (family == AF_INET) { | |
1335 | if (nexthop->rmap_src.ipv4 | |
1336 | .s_addr | |
1337 | != 0) { | |
1338 | src.ipv4 = | |
1339 | nexthop->rmap_src | |
1340 | .ipv4; | |
1341 | setsrc = 1; | |
1342 | } else if (nexthop->src.ipv4 | |
1343 | .s_addr | |
1344 | != 0) { | |
1345 | src.ipv4 = | |
1346 | nexthop->src | |
1347 | .ipv4; | |
1348 | setsrc = 1; | |
1349 | } | |
1350 | } else if (family == AF_INET6) { | |
1351 | if (!IN6_IS_ADDR_UNSPECIFIED( | |
1352 | &nexthop->rmap_src | |
1353 | .ipv6)) { | |
1354 | src.ipv6 = | |
1355 | nexthop->rmap_src | |
1356 | .ipv6; | |
1357 | setsrc = 1; | |
1358 | } else if ( | |
1359 | !IN6_IS_ADDR_UNSPECIFIED( | |
1360 | &nexthop->src | |
1361 | .ipv6)) { | |
1362 | src.ipv6 = | |
1363 | nexthop->src | |
1364 | .ipv6; | |
1365 | setsrc = 1; | |
1366 | } | |
1367 | } | |
1368 | } | |
1369 | continue; | |
1370 | } | |
1371 | ||
1372 | if ((cmd == RTM_NEWROUTE | |
1373 | && CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE)) | |
1374 | || (cmd == RTM_DELROUTE | |
1375 | && CHECK_FLAG(nexthop->flags, | |
1376 | NEXTHOP_FLAG_FIB))) { | |
1377 | routedesc = nexthop->rparent | |
1378 | ? "recursive, 1 hop" | |
1379 | : "single hop"; | |
1380 | ||
1381 | _netlink_route_debug(cmd, p, nexthop, routedesc, | |
1382 | family, zvrf); | |
1383 | _netlink_route_build_singlepath( | |
1384 | routedesc, bytelen, nexthop, &req.n, | |
1385 | &req.r, sizeof req, cmd); | |
1386 | nexthop_num++; | |
1387 | break; | |
1388 | } | |
1389 | } | |
1390 | if (setsrc && (cmd == RTM_NEWROUTE)) { | |
1391 | if (family == AF_INET) | |
1392 | addattr_l(&req.n, sizeof req, RTA_PREFSRC, | |
1393 | &src.ipv4, bytelen); | |
1394 | else if (family == AF_INET6) | |
1395 | addattr_l(&req.n, sizeof req, RTA_PREFSRC, | |
1396 | &src.ipv6, bytelen); | |
1397 | } | |
1398 | } else { | |
1399 | char buf[NL_PKT_BUF_SIZE]; | |
1400 | struct rtattr *rta = (void *)buf; | |
1401 | struct rtnexthop *rtnh; | |
1402 | union g_addr *src1 = NULL; | |
1403 | ||
1404 | rta->rta_type = RTA_MULTIPATH; | |
1405 | rta->rta_len = RTA_LENGTH(0); | |
1406 | rtnh = RTA_DATA(rta); | |
1407 | ||
1408 | nexthop_num = 0; | |
1409 | for (ALL_NEXTHOPS(re->nexthop, nexthop)) { | |
1410 | if (nexthop_num >= multipath_num) | |
1411 | break; | |
1412 | ||
1413 | if (CHECK_FLAG(nexthop->flags, | |
1414 | NEXTHOP_FLAG_RECURSIVE)) { | |
1415 | /* This only works for IPv4 now */ | |
1416 | if (!setsrc) { | |
1417 | if (family == AF_INET) { | |
1418 | if (nexthop->rmap_src.ipv4 | |
1419 | .s_addr | |
1420 | != 0) { | |
1421 | src.ipv4 = | |
1422 | nexthop->rmap_src | |
1423 | .ipv4; | |
1424 | setsrc = 1; | |
1425 | } else if (nexthop->src.ipv4 | |
1426 | .s_addr | |
1427 | != 0) { | |
1428 | src.ipv4 = | |
1429 | nexthop->src | |
1430 | .ipv4; | |
1431 | setsrc = 1; | |
1432 | } | |
1433 | } else if (family == AF_INET6) { | |
1434 | if (!IN6_IS_ADDR_UNSPECIFIED( | |
1435 | &nexthop->rmap_src | |
1436 | .ipv6)) { | |
1437 | src.ipv6 = | |
1438 | nexthop->rmap_src | |
1439 | .ipv6; | |
1440 | setsrc = 1; | |
1441 | } else if ( | |
1442 | !IN6_IS_ADDR_UNSPECIFIED( | |
1443 | &nexthop->src | |
1444 | .ipv6)) { | |
1445 | src.ipv6 = | |
1446 | nexthop->src | |
1447 | .ipv6; | |
1448 | setsrc = 1; | |
1449 | } | |
1450 | } | |
1451 | } | |
1452 | continue; | |
1453 | } | |
1454 | ||
1455 | if ((cmd == RTM_NEWROUTE | |
1456 | && CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE)) | |
1457 | || (cmd == RTM_DELROUTE | |
1458 | && CHECK_FLAG(nexthop->flags, | |
1459 | NEXTHOP_FLAG_FIB))) { | |
1460 | routedesc = nexthop->rparent | |
1461 | ? "recursive, multihop" | |
1462 | : "multihop"; | |
1463 | nexthop_num++; | |
1464 | ||
1465 | _netlink_route_debug(cmd, p, nexthop, routedesc, | |
1466 | family, zvrf); | |
1467 | _netlink_route_build_multipath( | |
1468 | routedesc, bytelen, nexthop, rta, rtnh, | |
1469 | &req.r, &src1); | |
1470 | rtnh = RTNH_NEXT(rtnh); | |
1471 | ||
1472 | if (!setsrc && src1) { | |
1473 | if (family == AF_INET) | |
1474 | src.ipv4 = src1->ipv4; | |
1475 | else if (family == AF_INET6) | |
1476 | src.ipv6 = src1->ipv6; | |
1477 | ||
1478 | setsrc = 1; | |
1479 | } | |
1480 | } | |
1481 | } | |
1482 | if (setsrc && (cmd == RTM_NEWROUTE)) { | |
1483 | if (family == AF_INET) | |
1484 | addattr_l(&req.n, sizeof req, RTA_PREFSRC, | |
1485 | &src.ipv4, bytelen); | |
1486 | else if (family == AF_INET6) | |
1487 | addattr_l(&req.n, sizeof req, RTA_PREFSRC, | |
1488 | &src.ipv6, bytelen); | |
1489 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1490 | zlog_debug("Setting source"); | |
1491 | } | |
1492 | ||
1493 | if (rta->rta_len > RTA_LENGTH(0)) | |
1494 | addattr_l(&req.n, NL_PKT_BUF_SIZE, RTA_MULTIPATH, | |
1495 | RTA_DATA(rta), RTA_PAYLOAD(rta)); | |
1496 | } | |
718e3744 | 1497 | |
d62a17ae | 1498 | /* If there is no useful nexthop then return. */ |
1499 | if (nexthop_num == 0) { | |
1500 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1501 | zlog_debug( | |
1502 | "netlink_route_multipath(): No useful nexthop."); | |
1503 | return 0; | |
1504 | } | |
718e3744 | 1505 | |
7021c425 | 1506 | skip: |
718e3744 | 1507 | |
d62a17ae | 1508 | /* Destination netlink address. */ |
1509 | memset(&snl, 0, sizeof snl); | |
1510 | snl.nl_family = AF_NETLINK; | |
718e3744 | 1511 | |
d62a17ae | 1512 | /* Talk to netlink socket. */ |
1513 | return netlink_talk(netlink_talk_filter, &req.n, &zns->netlink_cmd, zns, | |
1514 | 0); | |
718e3744 | 1515 | } |
1516 | ||
43b5cc5e | 1517 | int kernel_get_ipmr_sg_stats(struct zebra_vrf *zvrf, void *in) |
e3be0432 | 1518 | { |
d62a17ae | 1519 | int suc = 0; |
1520 | struct mcast_route_data *mr = (struct mcast_route_data *)in; | |
bd8b9272 DS |
1521 | struct { |
1522 | struct nlmsghdr n; | |
1523 | struct ndmsg ndm; | |
1524 | char buf[256]; | |
1525 | } req; | |
e3be0432 | 1526 | |
d62a17ae | 1527 | mroute = mr; |
bd8b9272 DS |
1528 | struct zebra_ns *zns = zebra_ns_lookup(NS_DEFAULT); |
1529 | ||
1530 | memset(&req.n, 0, sizeof(req.n)); | |
1531 | memset(&req.ndm, 0, sizeof(req.ndm)); | |
1532 | ||
1533 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)); | |
1534 | req.n.nlmsg_flags = NLM_F_REQUEST; | |
1535 | req.n.nlmsg_pid = zns->netlink_cmd.snl.nl_pid; | |
1536 | ||
1537 | req.ndm.ndm_family = RTNL_FAMILY_IPMR; | |
1538 | req.n.nlmsg_type = RTM_GETROUTE; | |
1539 | ||
1540 | addattr_l(&req.n, sizeof(req), RTA_IIF, &mroute->ifindex, 4); | |
1541 | addattr_l(&req.n, sizeof(req), RTA_OIF, &mroute->ifindex, 4); | |
1542 | addattr_l(&req.n, sizeof(req), RTA_SRC, &mroute->sg.src.s_addr, 4); | |
1543 | addattr_l(&req.n, sizeof(req), RTA_DST, &mroute->sg.grp.s_addr, 4); | |
1544 | addattr_l(&req.n, sizeof(req), RTA_TABLE, &zvrf->table_id, 4); | |
e3be0432 | 1545 | |
bd8b9272 DS |
1546 | suc = netlink_talk(netlink_route_change_read_multicast, &req.n, |
1547 | &zns->netlink_cmd, zns, 0); | |
e3be0432 | 1548 | |
bd8b9272 | 1549 | mroute = NULL; |
d62a17ae | 1550 | return suc; |
e3be0432 DS |
1551 | } |
1552 | ||
d62a17ae | 1553 | int kernel_route_rib(struct prefix *p, struct prefix *src_p, |
1554 | struct route_entry *old, struct route_entry *new) | |
718e3744 | 1555 | { |
0af35d90 RW |
1556 | assert(old || new); |
1557 | ||
d62a17ae | 1558 | if (!old && new) |
1559 | return netlink_route_multipath(RTM_NEWROUTE, p, src_p, new, 0); | |
1560 | if (old && !new) | |
1561 | return netlink_route_multipath(RTM_DELROUTE, p, src_p, old, 0); | |
718e3744 | 1562 | |
d62a17ae | 1563 | return netlink_route_multipath(RTM_NEWROUTE, p, src_p, new, 1); |
718e3744 | 1564 | } |
1565 | ||
d62a17ae | 1566 | int kernel_neigh_update(int add, int ifindex, uint32_t addr, char *lla, |
1567 | int llalen) | |
6b8a5694 | 1568 | { |
d62a17ae | 1569 | return netlink_neigh_update(add ? RTM_NEWNEIGH : RTM_DELNEIGH, ifindex, |
1570 | addr, lla, llalen); | |
6b8a5694 | 1571 | } |
718e3744 | 1572 | |
13d60d35 | 1573 | /* |
1574 | * Add remote VTEP to the flood list for this VxLAN interface (VNI). This | |
1575 | * is done by adding an FDB entry with a MAC of 00:00:00:00:00:00. | |
1576 | */ | |
d62a17ae | 1577 | static int netlink_vxlan_flood_list_update(struct interface *ifp, |
1578 | struct in_addr *vtep_ip, int cmd) | |
13d60d35 | 1579 | { |
d62a17ae | 1580 | struct zebra_ns *zns = zebra_ns_lookup(NS_DEFAULT); |
1581 | struct { | |
1582 | struct nlmsghdr n; | |
1583 | struct ndmsg ndm; | |
1584 | char buf[256]; | |
1585 | } req; | |
1586 | u_char dst_mac[6] = {0x0, 0x0, 0x0, 0x0, 0x0, 0x0}; | |
1587 | ||
1588 | memset(&req.n, 0, sizeof(req.n)); | |
1589 | memset(&req.ndm, 0, sizeof(req.ndm)); | |
1590 | ||
1591 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)); | |
1592 | req.n.nlmsg_flags = NLM_F_REQUEST; | |
1593 | if (cmd == RTM_NEWNEIGH) | |
1594 | req.n.nlmsg_flags |= (NLM_F_CREATE | NLM_F_APPEND); | |
1595 | req.n.nlmsg_type = cmd; | |
1596 | req.ndm.ndm_family = PF_BRIDGE; | |
1597 | req.ndm.ndm_state = NUD_NOARP | NUD_PERMANENT; | |
1598 | req.ndm.ndm_flags |= NTF_SELF; // Handle by "self", not "master" | |
1599 | ||
1600 | ||
1601 | addattr_l(&req.n, sizeof(req), NDA_LLADDR, &dst_mac, 6); | |
1602 | req.ndm.ndm_ifindex = ifp->ifindex; | |
1603 | addattr_l(&req.n, sizeof(req), NDA_DST, &vtep_ip->s_addr, 4); | |
1604 | ||
1605 | return netlink_talk(netlink_talk_filter, &req.n, &zns->netlink_cmd, zns, | |
1606 | 0); | |
13d60d35 | 1607 | } |
1608 | ||
1609 | /* | |
d62a17ae | 1610 | * Add remote VTEP for this VxLAN interface (VNI). In Linux, this involves |
1611 | * adding | |
13d60d35 | 1612 | * a "flood" MAC FDB entry. |
1613 | */ | |
d62a17ae | 1614 | int kernel_add_vtep(vni_t vni, struct interface *ifp, struct in_addr *vtep_ip) |
13d60d35 | 1615 | { |
d62a17ae | 1616 | if (IS_ZEBRA_DEBUG_VXLAN) |
1617 | zlog_debug("Install %s into flood list for VNI %u intf %s(%u)", | |
1618 | inet_ntoa(*vtep_ip), vni, ifp->name, ifp->ifindex); | |
13d60d35 | 1619 | |
d62a17ae | 1620 | return netlink_vxlan_flood_list_update(ifp, vtep_ip, RTM_NEWNEIGH); |
13d60d35 | 1621 | } |
1622 | ||
1623 | /* | |
1624 | * Remove remote VTEP for this VxLAN interface (VNI). In Linux, this involves | |
1625 | * deleting the "flood" MAC FDB entry. | |
1626 | */ | |
d62a17ae | 1627 | int kernel_del_vtep(vni_t vni, struct interface *ifp, struct in_addr *vtep_ip) |
13d60d35 | 1628 | { |
d62a17ae | 1629 | if (IS_ZEBRA_DEBUG_VXLAN) |
1630 | zlog_debug( | |
1631 | "Uninstall %s from flood list for VNI %u intf %s(%u)", | |
1632 | inet_ntoa(*vtep_ip), vni, ifp->name, ifp->ifindex); | |
13d60d35 | 1633 | |
d62a17ae | 1634 | return netlink_vxlan_flood_list_update(ifp, vtep_ip, RTM_DELNEIGH); |
13d60d35 | 1635 | } |
1636 | ||
2232a77c | 1637 | #ifndef NDA_RTA |
d62a17ae | 1638 | #define NDA_RTA(r) \ |
1639 | ((struct rtattr *)(((char *)(r)) + NLMSG_ALIGN(sizeof(struct ndmsg)))) | |
2232a77c | 1640 | #endif |
1641 | ||
d62a17ae | 1642 | static int netlink_macfdb_change(struct sockaddr_nl *snl, struct nlmsghdr *h, |
1643 | int len) | |
2232a77c | 1644 | { |
d62a17ae | 1645 | struct ndmsg *ndm; |
1646 | struct interface *ifp; | |
1647 | struct zebra_if *zif; | |
1648 | struct zebra_vrf *zvrf; | |
1649 | struct rtattr *tb[NDA_MAX + 1]; | |
1650 | struct interface *br_if; | |
1651 | struct ethaddr mac; | |
1652 | vlanid_t vid = 0; | |
1653 | struct prefix vtep_ip; | |
1654 | int vid_present = 0, dst_present = 0; | |
1655 | char buf[ETHER_ADDR_STRLEN]; | |
1656 | char vid_buf[20]; | |
1657 | char dst_buf[30]; | |
1658 | u_char sticky = 0; | |
1659 | ||
1660 | ndm = NLMSG_DATA(h); | |
1661 | ||
1662 | /* The interface should exist. */ | |
1663 | ifp = if_lookup_by_index_per_ns(zebra_ns_lookup(NS_DEFAULT), | |
1664 | ndm->ndm_ifindex); | |
1665 | if (!ifp) | |
1666 | return 0; | |
1667 | ||
1668 | /* Locate VRF corresponding to interface. We only process MAC | |
1669 | * notifications | |
1670 | * if EVPN is enabled on this VRF. | |
1671 | */ | |
1672 | zvrf = vrf_info_lookup(ifp->vrf_id); | |
1673 | if (!zvrf || !EVPN_ENABLED(zvrf)) | |
1674 | return 0; | |
1675 | if (!ifp->info) | |
1676 | return 0; | |
1677 | ||
1678 | /* The interface should be something we're interested in. */ | |
1679 | if (!IS_ZEBRA_IF_BRIDGE_SLAVE(ifp)) | |
1680 | return 0; | |
1681 | ||
1682 | /* Drop "permanent" entries. */ | |
1683 | if (ndm->ndm_state & NUD_PERMANENT) | |
1684 | return 0; | |
1685 | ||
1686 | zif = (struct zebra_if *)ifp->info; | |
1687 | if ((br_if = zif->brslave_info.br_if) == NULL) { | |
1688 | zlog_warn("%s family %s IF %s(%u) brIF %u - no bridge master", | |
1689 | nl_msg_type_to_str(h->nlmsg_type), | |
1690 | nl_family_to_str(ndm->ndm_family), ifp->name, | |
1691 | ndm->ndm_ifindex, zif->brslave_info.bridge_ifindex); | |
1692 | return 0; | |
1693 | } | |
1694 | ||
1695 | /* Parse attributes and extract fields of interest. */ | |
1696 | memset(tb, 0, sizeof tb); | |
1697 | netlink_parse_rtattr(tb, NDA_MAX, NDA_RTA(ndm), len); | |
1698 | ||
1699 | if (!tb[NDA_LLADDR]) { | |
1700 | zlog_warn("%s family %s IF %s(%u) brIF %u - no LLADDR", | |
1701 | nl_msg_type_to_str(h->nlmsg_type), | |
1702 | nl_family_to_str(ndm->ndm_family), ifp->name, | |
1703 | ndm->ndm_ifindex, zif->brslave_info.bridge_ifindex); | |
1704 | return 0; | |
1705 | } | |
1706 | ||
ff8b7eb8 | 1707 | if (RTA_PAYLOAD(tb[NDA_LLADDR]) != ETH_ALEN) { |
d62a17ae | 1708 | zlog_warn( |
df0b13cf | 1709 | "%s family %s IF %s(%u) brIF %u - LLADDR is not MAC, len %lu", |
d62a17ae | 1710 | nl_msg_type_to_str(h->nlmsg_type), |
1711 | nl_family_to_str(ndm->ndm_family), ifp->name, | |
1712 | ndm->ndm_ifindex, zif->brslave_info.bridge_ifindex, | |
df0b13cf | 1713 | (unsigned long)RTA_PAYLOAD(tb[NDA_LLADDR])); |
d62a17ae | 1714 | return 0; |
1715 | } | |
1716 | ||
ff8b7eb8 | 1717 | memcpy(&mac, RTA_DATA(tb[NDA_LLADDR]), ETH_ALEN); |
d62a17ae | 1718 | |
1719 | if ((NDA_VLAN <= NDA_MAX) && tb[NDA_VLAN]) { | |
1720 | vid_present = 1; | |
1721 | vid = *(u_int16_t *)RTA_DATA(tb[NDA_VLAN]); | |
1722 | sprintf(vid_buf, " VLAN %u", vid); | |
1723 | } | |
1724 | ||
1725 | if (tb[NDA_DST]) { | |
1726 | /* TODO: Only IPv4 supported now. */ | |
1727 | dst_present = 1; | |
1728 | vtep_ip.family = AF_INET; | |
1729 | vtep_ip.prefixlen = IPV4_MAX_BITLEN; | |
1730 | memcpy(&(vtep_ip.u.prefix4.s_addr), RTA_DATA(tb[NDA_DST]), | |
1731 | IPV4_MAX_BYTELEN); | |
1732 | sprintf(dst_buf, " dst %s", inet_ntoa(vtep_ip.u.prefix4)); | |
1733 | } | |
1734 | ||
1735 | sticky = (ndm->ndm_state & NUD_NOARP) ? 1 : 0; | |
1736 | ||
1737 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1738 | zlog_debug("Rx %s family %s IF %s(%u)%s %sMAC %s%s", | |
1739 | nl_msg_type_to_str(h->nlmsg_type), | |
1740 | nl_family_to_str(ndm->ndm_family), ifp->name, | |
1741 | ndm->ndm_ifindex, vid_present ? vid_buf : "", | |
1742 | sticky ? "sticky " : "", | |
1743 | prefix_mac2str(&mac, buf, sizeof(buf)), | |
1744 | dst_present ? dst_buf : ""); | |
1745 | ||
1746 | if (filter_vlan && vid != filter_vlan) | |
1747 | return 0; | |
1748 | ||
1749 | /* If add or update, do accordingly if learnt on a "local" interface; if | |
1750 | * the notification is over VxLAN, this has to be related to | |
1751 | * multi-homing, | |
1752 | * so perform an implicit delete of any local entry (if it exists). | |
1753 | */ | |
1754 | if (h->nlmsg_type == RTM_NEWNEIGH) { | |
1755 | /* Drop "permanent" entries. */ | |
1756 | if (ndm->ndm_state & NUD_PERMANENT) | |
1757 | return 0; | |
1758 | ||
1759 | if (IS_ZEBRA_IF_VXLAN(ifp)) | |
1760 | return zebra_vxlan_check_del_local_mac(ifp, br_if, &mac, | |
1761 | vid); | |
1762 | ||
1763 | return zebra_vxlan_local_mac_add_update(ifp, br_if, &mac, vid, | |
1764 | sticky); | |
1765 | } | |
1766 | ||
1767 | /* This is a delete notification. | |
1768 | * 1. For a MAC over VxLan, check if it needs to be refreshed(readded) | |
1769 | * 2. For a MAC over "local" interface, delete the mac | |
1770 | * Note: We will get notifications from both bridge driver and VxLAN | |
1771 | * driver. | |
1772 | * Ignore the notification from VxLan driver as it is also generated | |
1773 | * when mac moves from remote to local. | |
1774 | */ | |
1775 | if (dst_present) | |
1776 | return 0; | |
1777 | ||
1778 | if (IS_ZEBRA_IF_VXLAN(ifp)) | |
1779 | return zebra_vxlan_check_readd_remote_mac(ifp, br_if, &mac, | |
1780 | vid); | |
1781 | ||
1782 | return zebra_vxlan_local_mac_del(ifp, br_if, &mac, vid); | |
2232a77c | 1783 | } |
1784 | ||
d62a17ae | 1785 | static int netlink_macfdb_table(struct sockaddr_nl *snl, struct nlmsghdr *h, |
1786 | ns_id_t ns_id, int startup) | |
2232a77c | 1787 | { |
d62a17ae | 1788 | int len; |
1789 | struct ndmsg *ndm; | |
2232a77c | 1790 | |
d62a17ae | 1791 | if (h->nlmsg_type != RTM_NEWNEIGH) |
1792 | return 0; | |
2232a77c | 1793 | |
d62a17ae | 1794 | /* Length validity. */ |
1795 | len = h->nlmsg_len - NLMSG_LENGTH(sizeof(struct ndmsg)); | |
1796 | if (len < 0) | |
1797 | return -1; | |
2232a77c | 1798 | |
d62a17ae | 1799 | /* We are interested only in AF_BRIDGE notifications. */ |
1800 | ndm = NLMSG_DATA(h); | |
1801 | if (ndm->ndm_family != AF_BRIDGE) | |
1802 | return 0; | |
2232a77c | 1803 | |
d62a17ae | 1804 | return netlink_macfdb_change(snl, h, len); |
2232a77c | 1805 | } |
1806 | ||
1807 | /* Request for MAC FDB information from the kernel */ | |
d62a17ae | 1808 | static int netlink_request_macs(struct zebra_ns *zns, int family, int type, |
1809 | ifindex_t master_ifindex) | |
2232a77c | 1810 | { |
d62a17ae | 1811 | struct { |
1812 | struct nlmsghdr n; | |
1813 | struct ifinfomsg ifm; | |
1814 | char buf[256]; | |
1815 | } req; | |
1816 | ||
1817 | /* Form the request, specifying filter (rtattr) if needed. */ | |
1818 | memset(&req, 0, sizeof(req)); | |
1819 | req.n.nlmsg_type = type; | |
1820 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg)); | |
1821 | req.ifm.ifi_family = family; | |
1822 | if (master_ifindex) | |
1823 | addattr32(&req.n, sizeof(req), IFLA_MASTER, master_ifindex); | |
1824 | ||
1825 | return netlink_request(&zns->netlink_cmd, &req.n); | |
2232a77c | 1826 | } |
1827 | ||
1828 | /* | |
1829 | * MAC forwarding database read using netlink interface. This is invoked | |
1830 | * at startup. | |
1831 | */ | |
d62a17ae | 1832 | int netlink_macfdb_read(struct zebra_ns *zns) |
2232a77c | 1833 | { |
d62a17ae | 1834 | int ret; |
1835 | ||
1836 | /* Get bridge FDB table. */ | |
1837 | ret = netlink_request_macs(zns, AF_BRIDGE, RTM_GETNEIGH, 0); | |
1838 | if (ret < 0) | |
1839 | return ret; | |
1840 | /* We are reading entire table. */ | |
1841 | filter_vlan = 0; | |
1842 | ret = netlink_parse_info(netlink_macfdb_table, &zns->netlink_cmd, zns, | |
1843 | 0, 1); | |
1844 | ||
1845 | return ret; | |
2232a77c | 1846 | } |
1847 | ||
1848 | /* | |
1849 | * MAC forwarding database read using netlink interface. This is for a | |
1850 | * specific bridge and matching specific access VLAN (if VLAN-aware bridge). | |
1851 | */ | |
d62a17ae | 1852 | int netlink_macfdb_read_for_bridge(struct zebra_ns *zns, struct interface *ifp, |
1853 | struct interface *br_if) | |
2232a77c | 1854 | { |
d62a17ae | 1855 | struct zebra_if *br_zif; |
1856 | struct zebra_if *zif; | |
1857 | struct zebra_l2info_vxlan *vxl; | |
1858 | int ret = 0; | |
1859 | ||
1860 | ||
1861 | /* Save VLAN we're filtering on, if needed. */ | |
1862 | br_zif = (struct zebra_if *)br_if->info; | |
1863 | zif = (struct zebra_if *)ifp->info; | |
1864 | vxl = &zif->l2info.vxl; | |
1865 | if (IS_ZEBRA_IF_BRIDGE_VLAN_AWARE(br_zif)) | |
1866 | filter_vlan = vxl->access_vlan; | |
1867 | ||
1868 | /* Get bridge FDB table for specific bridge - we do the VLAN filtering. | |
1869 | */ | |
1870 | ret = netlink_request_macs(zns, AF_BRIDGE, RTM_GETNEIGH, | |
1871 | br_if->ifindex); | |
1872 | if (ret < 0) | |
1873 | return ret; | |
1874 | ret = netlink_parse_info(netlink_macfdb_table, &zns->netlink_cmd, zns, | |
1875 | 0, 0); | |
1876 | ||
1877 | /* Reset VLAN filter. */ | |
1878 | filter_vlan = 0; | |
1879 | return ret; | |
2232a77c | 1880 | } |
1881 | ||
d62a17ae | 1882 | static int netlink_macfdb_update(struct interface *ifp, vlanid_t vid, |
1883 | struct ethaddr *mac, struct in_addr vtep_ip, | |
1884 | int local, int cmd, u_char sticky) | |
2232a77c | 1885 | { |
d62a17ae | 1886 | struct zebra_ns *zns = zebra_ns_lookup(NS_DEFAULT); |
1887 | struct { | |
1888 | struct nlmsghdr n; | |
1889 | struct ndmsg ndm; | |
1890 | char buf[256]; | |
1891 | } req; | |
1892 | int dst_alen; | |
1893 | struct zebra_if *zif; | |
1894 | struct interface *br_if; | |
1895 | struct zebra_if *br_zif; | |
1896 | char buf[ETHER_ADDR_STRLEN]; | |
1897 | int vid_present = 0, dst_present = 0; | |
1898 | char vid_buf[20]; | |
1899 | char dst_buf[30]; | |
1900 | ||
1901 | zif = ifp->info; | |
1902 | if ((br_if = zif->brslave_info.br_if) == NULL) { | |
1903 | zlog_warn("MAC %s on IF %s(%u) - no mapping to bridge", | |
1904 | (cmd == RTM_NEWNEIGH) ? "add" : "del", ifp->name, | |
1905 | ifp->ifindex); | |
1906 | return -1; | |
1907 | } | |
1908 | ||
1909 | memset(&req.n, 0, sizeof(req.n)); | |
1910 | memset(&req.ndm, 0, sizeof(req.ndm)); | |
1911 | ||
1912 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)); | |
1913 | req.n.nlmsg_flags = NLM_F_REQUEST; | |
1914 | if (cmd == RTM_NEWNEIGH) | |
1915 | req.n.nlmsg_flags |= (NLM_F_CREATE | NLM_F_REPLACE); | |
1916 | req.n.nlmsg_type = cmd; | |
1917 | req.ndm.ndm_family = AF_BRIDGE; | |
1918 | req.ndm.ndm_flags |= NTF_SELF | NTF_MASTER; | |
1919 | req.ndm.ndm_state = NUD_REACHABLE; | |
1920 | ||
1921 | if (sticky) | |
1922 | req.ndm.ndm_state |= NUD_NOARP; | |
1923 | else | |
1924 | req.ndm.ndm_flags |= NTF_EXT_LEARNED; | |
1925 | ||
1926 | addattr_l(&req.n, sizeof(req), NDA_LLADDR, mac, 6); | |
1927 | req.ndm.ndm_ifindex = ifp->ifindex; | |
1928 | if (!local) { | |
1929 | dst_alen = 4; // TODO: hardcoded | |
1930 | addattr_l(&req.n, sizeof(req), NDA_DST, &vtep_ip, dst_alen); | |
1931 | dst_present = 1; | |
1932 | sprintf(dst_buf, " dst %s", inet_ntoa(vtep_ip)); | |
1933 | } | |
1934 | br_zif = (struct zebra_if *)br_if->info; | |
1935 | if (IS_ZEBRA_IF_BRIDGE_VLAN_AWARE(br_zif) && vid > 0) { | |
1936 | addattr16(&req.n, sizeof(req), NDA_VLAN, vid); | |
1937 | vid_present = 1; | |
1938 | sprintf(vid_buf, " VLAN %u", vid); | |
1939 | } | |
1940 | addattr32(&req.n, sizeof(req), NDA_MASTER, br_if->ifindex); | |
1941 | ||
1942 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1943 | zlog_debug("Tx %s family %s IF %s(%u)%s %sMAC %s%s", | |
1944 | nl_msg_type_to_str(cmd), | |
1945 | nl_family_to_str(req.ndm.ndm_family), ifp->name, | |
1946 | ifp->ifindex, vid_present ? vid_buf : "", | |
1947 | sticky ? "sticky " : "", | |
1948 | prefix_mac2str(mac, buf, sizeof(buf)), | |
1949 | dst_present ? dst_buf : ""); | |
1950 | ||
1951 | return netlink_talk(netlink_talk_filter, &req.n, &zns->netlink_cmd, zns, | |
1952 | 0); | |
2232a77c | 1953 | } |
1954 | ||
d62a17ae | 1955 | #define NUD_VALID \ |
1956 | (NUD_PERMANENT | NUD_NOARP | NUD_REACHABLE | NUD_PROBE | NUD_STALE \ | |
1957 | | NUD_DELAY) | |
2232a77c | 1958 | |
d62a17ae | 1959 | static int netlink_ipneigh_change(struct sockaddr_nl *snl, struct nlmsghdr *h, |
1960 | int len) | |
2232a77c | 1961 | { |
d62a17ae | 1962 | struct ndmsg *ndm; |
1963 | struct interface *ifp; | |
1964 | struct zebra_if *zif; | |
1965 | struct zebra_vrf *zvrf; | |
1966 | struct rtattr *tb[NDA_MAX + 1]; | |
1967 | struct interface *link_if; | |
1968 | struct ethaddr mac; | |
1969 | struct ipaddr ip; | |
1970 | char buf[ETHER_ADDR_STRLEN]; | |
1971 | char buf2[INET6_ADDRSTRLEN]; | |
1972 | int mac_present = 0; | |
1973 | u_char ext_learned; | |
1974 | ||
1975 | ndm = NLMSG_DATA(h); | |
1976 | ||
1977 | /* The interface should exist. */ | |
1978 | ifp = if_lookup_by_index_per_ns(zebra_ns_lookup(NS_DEFAULT), | |
1979 | ndm->ndm_ifindex); | |
1980 | if (!ifp) | |
1981 | return 0; | |
1982 | ||
1983 | /* Locate VRF corresponding to interface. We only process neigh | |
1984 | * notifications | |
1985 | * if EVPN is enabled on this VRF. | |
1986 | */ | |
1987 | zvrf = vrf_info_lookup(ifp->vrf_id); | |
1988 | if (!zvrf || !EVPN_ENABLED(zvrf)) | |
1989 | return 0; | |
1990 | if (!ifp->info) | |
1991 | return 0; | |
1992 | ||
1993 | /* Drop "permanent" entries. */ | |
1994 | if (ndm->ndm_state & NUD_PERMANENT) | |
1995 | return 0; | |
1996 | ||
1997 | zif = (struct zebra_if *)ifp->info; | |
1998 | /* The neighbor is present on an SVI. From this, we locate the | |
1999 | * underlying | |
2000 | * bridge because we're only interested in neighbors on a VxLAN bridge. | |
2001 | * The bridge is located based on the nature of the SVI: | |
2002 | * (a) In the case of a VLAN-aware bridge, the SVI is a L3 VLAN | |
2003 | * interface | |
2004 | * and is linked to the bridge | |
2005 | * (b) In the case of a VLAN-unaware bridge, the SVI is the bridge | |
2006 | * inteface | |
2007 | * itself | |
2008 | */ | |
2009 | if (IS_ZEBRA_IF_VLAN(ifp)) { | |
2010 | link_if = zif->link; | |
2011 | if (!link_if) | |
2012 | return 0; | |
2013 | } else if (IS_ZEBRA_IF_BRIDGE(ifp)) | |
2014 | link_if = ifp; | |
2015 | else | |
2016 | return 0; | |
2017 | ||
2018 | /* Parse attributes and extract fields of interest. */ | |
2019 | memset(tb, 0, sizeof tb); | |
2020 | netlink_parse_rtattr(tb, NDA_MAX, NDA_RTA(ndm), len); | |
2021 | ||
2022 | if (!tb[NDA_DST]) { | |
2023 | zlog_warn("%s family %s IF %s(%u) - no DST", | |
2024 | nl_msg_type_to_str(h->nlmsg_type), | |
2025 | nl_family_to_str(ndm->ndm_family), ifp->name, | |
2026 | ndm->ndm_ifindex); | |
2027 | return 0; | |
2028 | } | |
2029 | memset(&mac, 0, sizeof(struct ethaddr)); | |
2030 | memset(&ip, 0, sizeof(struct ipaddr)); | |
2031 | ip.ipa_type = (ndm->ndm_family == AF_INET) ? IPADDR_V4 : IPADDR_V6; | |
2032 | memcpy(&ip.ip.addr, RTA_DATA(tb[NDA_DST]), RTA_PAYLOAD(tb[NDA_DST])); | |
2033 | ||
2034 | if (h->nlmsg_type == RTM_NEWNEIGH) { | |
2035 | if (tb[NDA_LLADDR]) { | |
ff8b7eb8 | 2036 | if (RTA_PAYLOAD(tb[NDA_LLADDR]) != ETH_ALEN) { |
d62a17ae | 2037 | zlog_warn( |
df0b13cf | 2038 | "%s family %s IF %s(%u) - LLADDR is not MAC, len %lu", |
d62a17ae | 2039 | nl_msg_type_to_str(h->nlmsg_type), |
2040 | nl_family_to_str(ndm->ndm_family), | |
2041 | ifp->name, ndm->ndm_ifindex, | |
df0b13cf | 2042 | (unsigned long)RTA_PAYLOAD(tb[NDA_LLADDR])); |
d62a17ae | 2043 | return 0; |
2044 | } | |
2045 | ||
2046 | mac_present = 1; | |
ff8b7eb8 | 2047 | memcpy(&mac, RTA_DATA(tb[NDA_LLADDR]), ETH_ALEN); |
d62a17ae | 2048 | } |
2049 | ||
2050 | ext_learned = (ndm->ndm_flags & NTF_EXT_LEARNED) ? 1 : 0; | |
2051 | ||
2052 | if (IS_ZEBRA_DEBUG_KERNEL) | |
2053 | zlog_debug( | |
2054 | "Rx %s family %s IF %s(%u) IP %s MAC %s state 0x%x flags 0x%x", | |
2055 | nl_msg_type_to_str(h->nlmsg_type), | |
2056 | nl_family_to_str(ndm->ndm_family), ifp->name, | |
2057 | ndm->ndm_ifindex, | |
2058 | ipaddr2str(&ip, buf2, sizeof(buf2)), | |
2059 | mac_present | |
2060 | ? prefix_mac2str(&mac, buf, sizeof(buf)) | |
2061 | : "", | |
2062 | ndm->ndm_state, ndm->ndm_flags); | |
2063 | ||
2064 | /* If the neighbor state is valid for use, process as an add or | |
2065 | * update | |
2066 | * else process as a delete. Note that the delete handling may | |
2067 | * result | |
2068 | * in re-adding the neighbor if it is a valid "remote" neighbor. | |
2069 | */ | |
2070 | if (ndm->ndm_state & NUD_VALID) | |
2071 | return zebra_vxlan_local_neigh_add_update( | |
2072 | ifp, link_if, &ip, &mac, ndm->ndm_state, | |
2073 | ext_learned); | |
2074 | ||
2075 | return zebra_vxlan_local_neigh_del(ifp, link_if, &ip); | |
2076 | } | |
2077 | ||
2078 | if (IS_ZEBRA_DEBUG_KERNEL) | |
2079 | zlog_debug("Rx %s family %s IF %s(%u) IP %s", | |
2080 | nl_msg_type_to_str(h->nlmsg_type), | |
2081 | nl_family_to_str(ndm->ndm_family), ifp->name, | |
2082 | ndm->ndm_ifindex, | |
2083 | ipaddr2str(&ip, buf2, sizeof(buf2))); | |
2084 | ||
2085 | /* Process the delete - it may result in re-adding the neighbor if it is | |
2086 | * a valid "remote" neighbor. | |
2087 | */ | |
2088 | return zebra_vxlan_local_neigh_del(ifp, link_if, &ip); | |
2232a77c | 2089 | } |
2090 | ||
d62a17ae | 2091 | static int netlink_neigh_table(struct sockaddr_nl *snl, struct nlmsghdr *h, |
2092 | ns_id_t ns_id, int startup) | |
2232a77c | 2093 | { |
d62a17ae | 2094 | int len; |
2095 | struct ndmsg *ndm; | |
2232a77c | 2096 | |
d62a17ae | 2097 | if (h->nlmsg_type != RTM_NEWNEIGH) |
2098 | return 0; | |
2232a77c | 2099 | |
d62a17ae | 2100 | /* Length validity. */ |
2101 | len = h->nlmsg_len - NLMSG_LENGTH(sizeof(struct ndmsg)); | |
2102 | if (len < 0) | |
2103 | return -1; | |
2232a77c | 2104 | |
d62a17ae | 2105 | /* We are interested only in AF_INET or AF_INET6 notifications. */ |
2106 | ndm = NLMSG_DATA(h); | |
2107 | if (ndm->ndm_family != AF_INET && ndm->ndm_family != AF_INET6) | |
2108 | return 0; | |
2232a77c | 2109 | |
d62a17ae | 2110 | return netlink_neigh_change(snl, h, len); |
2232a77c | 2111 | } |
2112 | ||
2113 | /* Request for IP neighbor information from the kernel */ | |
d62a17ae | 2114 | static int netlink_request_neigh(struct zebra_ns *zns, int family, int type, |
2115 | ifindex_t ifindex) | |
2232a77c | 2116 | { |
d62a17ae | 2117 | struct { |
2118 | struct nlmsghdr n; | |
2119 | struct ndmsg ndm; | |
2120 | char buf[256]; | |
2121 | } req; | |
2122 | ||
2123 | /* Form the request, specifying filter (rtattr) if needed. */ | |
2124 | memset(&req, 0, sizeof(req)); | |
2125 | req.n.nlmsg_type = type; | |
2126 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)); | |
2127 | req.ndm.ndm_family = family; | |
2128 | if (ifindex) | |
2129 | addattr32(&req.n, sizeof(req), NDA_IFINDEX, ifindex); | |
2130 | ||
2131 | return netlink_request(&zns->netlink_cmd, &req.n); | |
2232a77c | 2132 | } |
2133 | ||
2134 | /* | |
2135 | * IP Neighbor table read using netlink interface. This is invoked | |
2136 | * at startup. | |
2137 | */ | |
d62a17ae | 2138 | int netlink_neigh_read(struct zebra_ns *zns) |
2232a77c | 2139 | { |
d62a17ae | 2140 | int ret; |
2232a77c | 2141 | |
d62a17ae | 2142 | /* Get IP neighbor table. */ |
2143 | ret = netlink_request_neigh(zns, AF_UNSPEC, RTM_GETNEIGH, 0); | |
2144 | if (ret < 0) | |
2145 | return ret; | |
2146 | ret = netlink_parse_info(netlink_neigh_table, &zns->netlink_cmd, zns, 0, | |
2147 | 1); | |
2232a77c | 2148 | |
d62a17ae | 2149 | return ret; |
2232a77c | 2150 | } |
2151 | ||
2152 | /* | |
2153 | * IP Neighbor table read using netlink interface. This is for a specific | |
2154 | * VLAN device. | |
2155 | */ | |
d62a17ae | 2156 | int netlink_neigh_read_for_vlan(struct zebra_ns *zns, struct interface *vlan_if) |
2232a77c | 2157 | { |
d62a17ae | 2158 | int ret = 0; |
2232a77c | 2159 | |
d62a17ae | 2160 | ret = netlink_request_neigh(zns, AF_UNSPEC, RTM_GETNEIGH, |
2161 | vlan_if->ifindex); | |
2162 | if (ret < 0) | |
2163 | return ret; | |
2164 | ret = netlink_parse_info(netlink_neigh_table, &zns->netlink_cmd, zns, 0, | |
2165 | 0); | |
2232a77c | 2166 | |
d62a17ae | 2167 | return ret; |
2232a77c | 2168 | } |
2169 | ||
d62a17ae | 2170 | int netlink_neigh_change(struct sockaddr_nl *snl, struct nlmsghdr *h, |
2171 | ns_id_t ns_id) | |
2232a77c | 2172 | { |
d62a17ae | 2173 | int len; |
2174 | struct ndmsg *ndm; | |
2232a77c | 2175 | |
d62a17ae | 2176 | if (!(h->nlmsg_type == RTM_NEWNEIGH || h->nlmsg_type == RTM_DELNEIGH)) |
2177 | return 0; | |
2232a77c | 2178 | |
d62a17ae | 2179 | /* Length validity. */ |
2180 | len = h->nlmsg_len - NLMSG_LENGTH(sizeof(struct ndmsg)); | |
2181 | if (len < 0) | |
2182 | return -1; | |
2232a77c | 2183 | |
d62a17ae | 2184 | /* Is this a notification for the MAC FDB or IP neighbor table? */ |
2185 | ndm = NLMSG_DATA(h); | |
2186 | if (ndm->ndm_family == AF_BRIDGE) | |
2187 | return netlink_macfdb_change(snl, h, len); | |
2232a77c | 2188 | |
d62a17ae | 2189 | if (ndm->ndm_type != RTN_UNICAST) |
2190 | return 0; | |
2232a77c | 2191 | |
d62a17ae | 2192 | if (ndm->ndm_family == AF_INET || ndm->ndm_family == AF_INET6) |
2193 | return netlink_ipneigh_change(snl, h, len); | |
2232a77c | 2194 | |
d62a17ae | 2195 | return 0; |
2232a77c | 2196 | } |
2197 | ||
d62a17ae | 2198 | static int netlink_neigh_update2(struct interface *ifp, struct ipaddr *ip, |
2199 | struct ethaddr *mac, u_int32_t flags, int cmd) | |
2232a77c | 2200 | { |
d62a17ae | 2201 | struct { |
2202 | struct nlmsghdr n; | |
2203 | struct ndmsg ndm; | |
2204 | char buf[256]; | |
2205 | } req; | |
2206 | int ipa_len; | |
2207 | ||
2208 | struct zebra_ns *zns = zebra_ns_lookup(NS_DEFAULT); | |
2209 | char buf[INET6_ADDRSTRLEN]; | |
2210 | char buf2[ETHER_ADDR_STRLEN]; | |
2211 | ||
2212 | memset(&req.n, 0, sizeof(req.n)); | |
2213 | memset(&req.ndm, 0, sizeof(req.ndm)); | |
2214 | ||
2215 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)); | |
2216 | req.n.nlmsg_flags = NLM_F_REQUEST; | |
2217 | if (cmd == RTM_NEWNEIGH) | |
2218 | req.n.nlmsg_flags |= (NLM_F_CREATE | NLM_F_REPLACE); | |
2219 | req.n.nlmsg_type = cmd; // RTM_NEWNEIGH or RTM_DELNEIGH | |
2220 | req.ndm.ndm_family = IS_IPADDR_V4(ip) ? AF_INET : AF_INET6; | |
2221 | req.ndm.ndm_state = flags; | |
2222 | req.ndm.ndm_ifindex = ifp->ifindex; | |
2223 | req.ndm.ndm_type = RTN_UNICAST; | |
2224 | req.ndm.ndm_flags = NTF_EXT_LEARNED; | |
2225 | ||
2226 | ||
2227 | ipa_len = IS_IPADDR_V4(ip) ? IPV4_MAX_BYTELEN : IPV6_MAX_BYTELEN; | |
2228 | addattr_l(&req.n, sizeof(req), NDA_DST, &ip->ip.addr, ipa_len); | |
2229 | if (mac) | |
2230 | addattr_l(&req.n, sizeof(req), NDA_LLADDR, mac, 6); | |
2231 | ||
2232 | if (IS_ZEBRA_DEBUG_KERNEL) | |
2233 | zlog_debug("Tx %s family %s IF %s(%u) Neigh %s MAC %s", | |
2234 | nl_msg_type_to_str(cmd), | |
2235 | nl_family_to_str(req.ndm.ndm_family), ifp->name, | |
2236 | ifp->ifindex, ipaddr2str(ip, buf, sizeof(buf)), | |
2237 | mac ? prefix_mac2str(mac, buf2, sizeof(buf2)) | |
2238 | : "null"); | |
2239 | ||
2240 | return netlink_talk(netlink_talk_filter, &req.n, &zns->netlink_cmd, zns, | |
2241 | 0); | |
2232a77c | 2242 | } |
2243 | ||
d62a17ae | 2244 | int kernel_add_mac(struct interface *ifp, vlanid_t vid, struct ethaddr *mac, |
2245 | struct in_addr vtep_ip, u_char sticky) | |
2232a77c | 2246 | { |
d62a17ae | 2247 | return netlink_macfdb_update(ifp, vid, mac, vtep_ip, 0, RTM_NEWNEIGH, |
2248 | sticky); | |
2232a77c | 2249 | } |
2250 | ||
d62a17ae | 2251 | int kernel_del_mac(struct interface *ifp, vlanid_t vid, struct ethaddr *mac, |
2252 | struct in_addr vtep_ip, int local) | |
2232a77c | 2253 | { |
d62a17ae | 2254 | return netlink_macfdb_update(ifp, vid, mac, vtep_ip, local, |
2255 | RTM_DELNEIGH, 0); | |
2232a77c | 2256 | } |
2257 | ||
d62a17ae | 2258 | int kernel_add_neigh(struct interface *ifp, struct ipaddr *ip, |
2259 | struct ethaddr *mac) | |
2232a77c | 2260 | { |
d62a17ae | 2261 | return netlink_neigh_update2(ifp, ip, mac, NUD_REACHABLE, RTM_NEWNEIGH); |
2232a77c | 2262 | } |
2263 | ||
d62a17ae | 2264 | int kernel_del_neigh(struct interface *ifp, struct ipaddr *ip) |
2232a77c | 2265 | { |
d62a17ae | 2266 | return netlink_neigh_update2(ifp, ip, NULL, 0, RTM_DELNEIGH); |
2232a77c | 2267 | } |
2268 | ||
40c7bdb0 | 2269 | /* |
2270 | * MPLS label forwarding table change via netlink interface. | |
2271 | */ | |
d62a17ae | 2272 | int netlink_mpls_multipath(int cmd, zebra_lsp_t *lsp) |
40c7bdb0 | 2273 | { |
d62a17ae | 2274 | mpls_lse_t lse; |
2275 | zebra_nhlfe_t *nhlfe; | |
2276 | struct nexthop *nexthop = NULL; | |
2277 | unsigned int nexthop_num; | |
2278 | const char *routedesc; | |
2279 | struct zebra_ns *zns = zebra_ns_lookup(NS_DEFAULT); | |
2280 | ||
2281 | struct { | |
2282 | struct nlmsghdr n; | |
2283 | struct rtmsg r; | |
2284 | char buf[NL_PKT_BUF_SIZE]; | |
2285 | } req; | |
2286 | ||
2287 | memset(&req, 0, sizeof req - NL_PKT_BUF_SIZE); | |
2288 | ||
2289 | ||
2290 | /* | |
2291 | * Count # nexthops so we can decide whether to use singlepath | |
2292 | * or multipath case. | |
2293 | */ | |
2294 | nexthop_num = 0; | |
2295 | for (nhlfe = lsp->nhlfe_list; nhlfe; nhlfe = nhlfe->next) { | |
2296 | nexthop = nhlfe->nexthop; | |
2297 | if (!nexthop) | |
2298 | continue; | |
2299 | if (cmd == RTM_NEWROUTE) { | |
2300 | /* Count all selected NHLFEs */ | |
2301 | if (CHECK_FLAG(nhlfe->flags, NHLFE_FLAG_SELECTED) | |
2302 | && CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE)) | |
2303 | nexthop_num++; | |
2304 | } else /* DEL */ | |
2305 | { | |
2306 | /* Count all installed NHLFEs */ | |
2307 | if (CHECK_FLAG(nhlfe->flags, NHLFE_FLAG_INSTALLED) | |
2308 | && CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB)) | |
2309 | nexthop_num++; | |
2310 | } | |
2311 | } | |
2312 | ||
2313 | if (nexthop_num == 0) // unexpected | |
2314 | return 0; | |
2315 | ||
2316 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)); | |
2317 | req.n.nlmsg_flags = NLM_F_CREATE | NLM_F_REQUEST; | |
2318 | req.n.nlmsg_type = cmd; | |
2319 | req.n.nlmsg_pid = zns->netlink_cmd.snl.nl_pid; | |
2320 | ||
2321 | req.r.rtm_family = AF_MPLS; | |
2322 | req.r.rtm_table = RT_TABLE_MAIN; | |
2323 | req.r.rtm_dst_len = MPLS_LABEL_LEN_BITS; | |
2324 | req.r.rtm_protocol = RTPROT_ZEBRA; | |
2325 | req.r.rtm_scope = RT_SCOPE_UNIVERSE; | |
2326 | req.r.rtm_type = RTN_UNICAST; | |
2327 | ||
2328 | if (cmd == RTM_NEWROUTE) | |
2329 | /* We do a replace to handle update. */ | |
2330 | req.n.nlmsg_flags |= NLM_F_REPLACE; | |
2331 | ||
2332 | /* Fill destination */ | |
2333 | lse = mpls_lse_encode(lsp->ile.in_label, 0, 0, 1); | |
2334 | addattr_l(&req.n, sizeof req, RTA_DST, &lse, sizeof(mpls_lse_t)); | |
2335 | ||
2336 | /* Fill nexthops (paths) based on single-path or multipath. The paths | |
2337 | * chosen depend on the operation. | |
2338 | */ | |
2339 | if (nexthop_num == 1 || multipath_num == 1) { | |
2340 | routedesc = "single hop"; | |
2341 | _netlink_mpls_debug(cmd, lsp->ile.in_label, routedesc); | |
2342 | ||
2343 | nexthop_num = 0; | |
2344 | for (nhlfe = lsp->nhlfe_list; nhlfe; nhlfe = nhlfe->next) { | |
2345 | nexthop = nhlfe->nexthop; | |
2346 | if (!nexthop) | |
2347 | continue; | |
2348 | ||
2349 | if ((cmd == RTM_NEWROUTE | |
2350 | && (CHECK_FLAG(nhlfe->flags, NHLFE_FLAG_SELECTED) | |
2351 | && CHECK_FLAG(nexthop->flags, | |
2352 | NEXTHOP_FLAG_ACTIVE))) | |
2353 | || (cmd == RTM_DELROUTE | |
2354 | && (CHECK_FLAG(nhlfe->flags, | |
2355 | NHLFE_FLAG_INSTALLED) | |
2356 | && CHECK_FLAG(nexthop->flags, | |
2357 | NEXTHOP_FLAG_FIB)))) { | |
2358 | /* Add the gateway */ | |
2359 | _netlink_mpls_build_singlepath(routedesc, nhlfe, | |
2360 | &req.n, &req.r, | |
2361 | sizeof req, cmd); | |
2362 | if (cmd == RTM_NEWROUTE) { | |
2363 | SET_FLAG(nhlfe->flags, | |
2364 | NHLFE_FLAG_INSTALLED); | |
2365 | SET_FLAG(nexthop->flags, | |
2366 | NEXTHOP_FLAG_FIB); | |
2367 | } else { | |
2368 | UNSET_FLAG(nhlfe->flags, | |
2369 | NHLFE_FLAG_INSTALLED); | |
2370 | UNSET_FLAG(nexthop->flags, | |
2371 | NEXTHOP_FLAG_FIB); | |
2372 | } | |
2373 | nexthop_num++; | |
2374 | break; | |
2375 | } | |
2376 | } | |
2377 | } else /* Multipath case */ | |
2378 | { | |
2379 | char buf[NL_PKT_BUF_SIZE]; | |
2380 | struct rtattr *rta = (void *)buf; | |
2381 | struct rtnexthop *rtnh; | |
2382 | union g_addr *src1 = NULL; | |
2383 | ||
2384 | rta->rta_type = RTA_MULTIPATH; | |
2385 | rta->rta_len = RTA_LENGTH(0); | |
2386 | rtnh = RTA_DATA(rta); | |
2387 | ||
2388 | routedesc = "multihop"; | |
2389 | _netlink_mpls_debug(cmd, lsp->ile.in_label, routedesc); | |
2390 | ||
2391 | nexthop_num = 0; | |
2392 | for (nhlfe = lsp->nhlfe_list; nhlfe; nhlfe = nhlfe->next) { | |
2393 | nexthop = nhlfe->nexthop; | |
2394 | if (!nexthop) | |
2395 | continue; | |
2396 | ||
2397 | if (nexthop_num >= multipath_num) | |
2398 | break; | |
2399 | ||
2400 | if ((cmd == RTM_NEWROUTE | |
2401 | && (CHECK_FLAG(nhlfe->flags, NHLFE_FLAG_SELECTED) | |
2402 | && CHECK_FLAG(nexthop->flags, | |
2403 | NEXTHOP_FLAG_ACTIVE))) | |
2404 | || (cmd == RTM_DELROUTE | |
2405 | && (CHECK_FLAG(nhlfe->flags, | |
2406 | NHLFE_FLAG_INSTALLED) | |
2407 | && CHECK_FLAG(nexthop->flags, | |
2408 | NEXTHOP_FLAG_FIB)))) { | |
2409 | nexthop_num++; | |
2410 | ||
2411 | /* Build the multipath */ | |
2412 | _netlink_mpls_build_multipath(routedesc, nhlfe, | |
2413 | rta, rtnh, &req.r, | |
2414 | &src1); | |
2415 | rtnh = RTNH_NEXT(rtnh); | |
2416 | ||
2417 | if (cmd == RTM_NEWROUTE) { | |
2418 | SET_FLAG(nhlfe->flags, | |
2419 | NHLFE_FLAG_INSTALLED); | |
2420 | SET_FLAG(nexthop->flags, | |
2421 | NEXTHOP_FLAG_FIB); | |
2422 | } else { | |
2423 | UNSET_FLAG(nhlfe->flags, | |
2424 | NHLFE_FLAG_INSTALLED); | |
2425 | UNSET_FLAG(nexthop->flags, | |
2426 | NEXTHOP_FLAG_FIB); | |
2427 | } | |
2428 | } | |
2429 | } | |
2430 | ||
2431 | /* Add the multipath */ | |
2432 | if (rta->rta_len > RTA_LENGTH(0)) | |
2433 | addattr_l(&req.n, NL_PKT_BUF_SIZE, RTA_MULTIPATH, | |
2434 | RTA_DATA(rta), RTA_PAYLOAD(rta)); | |
2435 | } | |
2436 | ||
2437 | /* Talk to netlink socket. */ | |
2438 | return netlink_talk(netlink_talk_filter, &req.n, &zns->netlink_cmd, zns, | |
2439 | 0); | |
40c7bdb0 | 2440 | } |
2441 | ||
2442 | /* | |
2443 | * Handle failure in LSP install, clear flags for NHLFE. | |
2444 | */ | |
d62a17ae | 2445 | void clear_nhlfe_installed(zebra_lsp_t *lsp) |
40c7bdb0 | 2446 | { |
d62a17ae | 2447 | zebra_nhlfe_t *nhlfe; |
2448 | struct nexthop *nexthop; | |
2449 | ||
2450 | for (nhlfe = lsp->nhlfe_list; nhlfe; nhlfe = nhlfe->next) { | |
2451 | nexthop = nhlfe->nexthop; | |
2452 | if (!nexthop) | |
2453 | continue; | |
2454 | ||
2455 | UNSET_FLAG(nhlfe->flags, NHLFE_FLAG_INSTALLED); | |
2456 | UNSET_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB); | |
2457 | } | |
40c7bdb0 | 2458 | } |
ddfeb486 DL |
2459 | |
2460 | #endif /* HAVE_NETLINK */ |