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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> |
ba777396 RW |
26 | #include <linux/lwtunnel.h> |
27 | #include <linux/mpls_iptunnel.h> | |
28 | #include <linux/neighbour.h> | |
29 | #include <linux/rtnetlink.h> | |
718e3744 | 30 | |
31 | /* Hack for GNU libc version 2. */ | |
32 | #ifndef MSG_TRUNC | |
33 | #define MSG_TRUNC 0x20 | |
34 | #endif /* MSG_TRUNC */ | |
35 | ||
36 | #include "linklist.h" | |
37 | #include "if.h" | |
38 | #include "log.h" | |
39 | #include "prefix.h" | |
40 | #include "connected.h" | |
41 | #include "table.h" | |
26e2ae36 | 42 | #include "memory.h" |
4a1ab8e4 | 43 | #include "zebra_memory.h" |
718e3744 | 44 | #include "rib.h" |
e04ab74d | 45 | #include "thread.h" |
edd7c245 | 46 | #include "privs.h" |
fb018d25 | 47 | #include "nexthop.h" |
78104b9b | 48 | #include "vrf.h" |
5e6a74d8 | 49 | #include "vty.h" |
40c7bdb0 | 50 | #include "mpls.h" |
13d60d35 | 51 | #include "vxlan.h" |
718e3744 | 52 | |
53 | #include "zebra/zserv.h" | |
fe18ee2d | 54 | #include "zebra/zebra_ns.h" |
7c551956 | 55 | #include "zebra/zebra_vrf.h" |
6621ca86 | 56 | #include "zebra/rt.h" |
718e3744 | 57 | #include "zebra/redistribute.h" |
58 | #include "zebra/interface.h" | |
59 | #include "zebra/debug.h" | |
12f6fb97 | 60 | #include "zebra/rtadv.h" |
567b877d | 61 | #include "zebra/zebra_ptm.h" |
40c7bdb0 | 62 | #include "zebra/zebra_mpls.h" |
1fdc9eae | 63 | #include "zebra/kernel_netlink.h" |
64 | #include "zebra/rt_netlink.h" | |
e3be0432 | 65 | #include "zebra/zebra_mroute.h" |
2232a77c | 66 | #include "zebra/zebra_vxlan.h" |
e3be0432 | 67 | |
40c7bdb0 | 68 | #ifndef AF_MPLS |
69 | #define AF_MPLS 28 | |
70 | #endif | |
71 | ||
2232a77c | 72 | static vlanid_t filter_vlan = 0; |
73 | ||
d62a17ae | 74 | struct gw_family_t { |
75 | u_int16_t filler; | |
76 | u_int16_t family; | |
77 | union g_addr gate; | |
40c7bdb0 | 78 | }; |
79 | ||
8755598a DS |
80 | char ipv4_ll_buf[16] = "169.254.0.1"; |
81 | struct in_addr ipv4_ll; | |
82 | ||
83 | /* | |
84 | * The ipv4_ll data structure is used for all 5549 | |
85 | * additions to the kernel. Let's figure out the | |
86 | * correct value one time instead for every | |
87 | * install/remove of a 5549 type route | |
88 | */ | |
d62a17ae | 89 | void rt_netlink_init(void) |
8755598a | 90 | { |
d62a17ae | 91 | inet_pton(AF_INET, ipv4_ll_buf, &ipv4_ll); |
8755598a DS |
92 | } |
93 | ||
23b1f334 DD |
94 | static inline int is_selfroute(int proto) |
95 | { | |
d62a17ae | 96 | if ((proto == RTPROT_BGP) || (proto == RTPROT_OSPF) |
97 | || (proto == RTPROT_STATIC) || (proto == RTPROT_ZEBRA) | |
98 | || (proto == RTPROT_ISIS) || (proto == RTPROT_RIPNG) | |
99 | || (proto == RTPROT_NHRP) || (proto == RTPROT_EIGRP) | |
915902cb DS |
100 | || (proto == RTPROT_LDP) || (proto == RTPROT_BABEL) |
101 | || (proto == RTPROT_RIP)) { | |
d62a17ae | 102 | return 1; |
103 | } | |
104 | ||
105 | return 0; | |
23b1f334 DD |
106 | } |
107 | ||
915902cb | 108 | static inline int zebra2proto(int proto) |
23b1f334 | 109 | { |
d62a17ae | 110 | switch (proto) { |
111 | case ZEBRA_ROUTE_BABEL: | |
112 | proto = RTPROT_BABEL; | |
113 | break; | |
114 | case ZEBRA_ROUTE_BGP: | |
115 | proto = RTPROT_BGP; | |
116 | break; | |
117 | case ZEBRA_ROUTE_OSPF: | |
118 | case ZEBRA_ROUTE_OSPF6: | |
119 | proto = RTPROT_OSPF; | |
120 | break; | |
121 | case ZEBRA_ROUTE_STATIC: | |
122 | proto = RTPROT_STATIC; | |
123 | break; | |
124 | case ZEBRA_ROUTE_ISIS: | |
125 | proto = RTPROT_ISIS; | |
126 | break; | |
127 | case ZEBRA_ROUTE_RIP: | |
128 | proto = RTPROT_RIP; | |
129 | break; | |
130 | case ZEBRA_ROUTE_RIPNG: | |
131 | proto = RTPROT_RIPNG; | |
132 | break; | |
133 | case ZEBRA_ROUTE_NHRP: | |
134 | proto = RTPROT_NHRP; | |
135 | break; | |
136 | case ZEBRA_ROUTE_EIGRP: | |
137 | proto = RTPROT_EIGRP; | |
138 | break; | |
139 | case ZEBRA_ROUTE_LDP: | |
140 | proto = RTPROT_LDP; | |
141 | break; | |
142 | default: | |
143 | proto = RTPROT_ZEBRA; | |
144 | break; | |
145 | } | |
146 | ||
147 | return proto; | |
23b1f334 DD |
148 | } |
149 | ||
915902cb DS |
150 | static inline int proto2zebra(int proto, int family) |
151 | { | |
152 | switch (proto) { | |
153 | case RTPROT_BABEL: | |
154 | proto = ZEBRA_ROUTE_BABEL; | |
155 | break; | |
156 | case RTPROT_BGP: | |
157 | proto = ZEBRA_ROUTE_BGP; | |
158 | break; | |
159 | case RTPROT_OSPF: | |
160 | proto = (family == AFI_IP) ? | |
161 | ZEBRA_ROUTE_OSPF : ZEBRA_ROUTE_OSPF6; | |
162 | break; | |
163 | case RTPROT_ISIS: | |
164 | proto = ZEBRA_ROUTE_ISIS; | |
165 | break; | |
166 | case RTPROT_RIP: | |
167 | proto = ZEBRA_ROUTE_RIP; | |
168 | break; | |
169 | case RTPROT_RIPNG: | |
170 | proto = ZEBRA_ROUTE_RIPNG; | |
171 | break; | |
172 | case RTPROT_NHRP: | |
173 | proto = ZEBRA_ROUTE_NHRP; | |
174 | break; | |
175 | case RTPROT_EIGRP: | |
176 | proto = ZEBRA_ROUTE_EIGRP; | |
177 | break; | |
178 | case RTPROT_LDP: | |
179 | proto = ZEBRA_ROUTE_LDP; | |
180 | break; | |
181 | case RTPROT_STATIC: | |
182 | proto = ZEBRA_ROUTE_STATIC; | |
183 | break; | |
184 | default: | |
185 | proto = ZEBRA_ROUTE_KERNEL; | |
186 | break; | |
187 | } | |
188 | return proto; | |
189 | } | |
190 | ||
12f6fb97 DS |
191 | /* |
192 | Pending: create an efficient table_id (in a tree/hash) based lookup) | |
193 | */ | |
d62a17ae | 194 | static vrf_id_t vrf_lookup_by_table(u_int32_t table_id) |
12f6fb97 | 195 | { |
d62a17ae | 196 | struct vrf *vrf; |
197 | struct zebra_vrf *zvrf; | |
12f6fb97 | 198 | |
a2addae8 | 199 | RB_FOREACH (vrf, vrf_id_head, &vrfs_by_id) { |
d62a17ae | 200 | if ((zvrf = vrf->info) == NULL || (zvrf->table_id != table_id)) |
201 | continue; | |
12f6fb97 | 202 | |
d62a17ae | 203 | return zvrf_id(zvrf); |
204 | } | |
12f6fb97 | 205 | |
d62a17ae | 206 | return VRF_DEFAULT; |
12f6fb97 DS |
207 | } |
208 | ||
718e3744 | 209 | /* Looking up routing table by netlink interface. */ |
d62a17ae | 210 | static int netlink_route_change_read_unicast(struct sockaddr_nl *snl, |
211 | struct nlmsghdr *h, ns_id_t ns_id, | |
212 | int startup) | |
718e3744 | 213 | { |
d62a17ae | 214 | int len; |
215 | struct rtmsg *rtm; | |
216 | struct rtattr *tb[RTA_MAX + 1]; | |
217 | u_char flags = 0; | |
218 | struct prefix p; | |
792fa92e | 219 | struct prefix_ipv6 src_p = {}; |
d62a17ae | 220 | vrf_id_t vrf_id = VRF_DEFAULT; |
221 | ||
222 | char anyaddr[16] = {0}; | |
223 | ||
915902cb | 224 | int proto = ZEBRA_ROUTE_KERNEL; |
d62a17ae | 225 | int index = 0; |
226 | int table; | |
227 | int metric = 0; | |
228 | u_int32_t mtu = 0; | |
25715c7e | 229 | uint8_t distance = 0; |
d62a17ae | 230 | |
231 | void *dest = NULL; | |
232 | void *gate = NULL; | |
233 | void *prefsrc = NULL; /* IPv4 preferred source host address */ | |
234 | void *src = NULL; /* IPv6 srcdest source prefix */ | |
e655a03c | 235 | enum blackhole_type bh_type = BLACKHOLE_UNSPEC; |
d62a17ae | 236 | |
237 | rtm = NLMSG_DATA(h); | |
238 | ||
239 | if (startup && h->nlmsg_type != RTM_NEWROUTE) | |
240 | return 0; | |
e655a03c DL |
241 | switch (rtm->rtm_type) { |
242 | case RTN_UNICAST: | |
243 | break; | |
244 | case RTN_BLACKHOLE: | |
245 | bh_type = BLACKHOLE_NULL; | |
246 | break; | |
247 | case RTN_UNREACHABLE: | |
248 | bh_type = BLACKHOLE_REJECT; | |
249 | break; | |
250 | case RTN_PROHIBIT: | |
251 | bh_type = BLACKHOLE_ADMINPROHIB; | |
252 | break; | |
253 | default: | |
d62a17ae | 254 | return 0; |
e655a03c | 255 | } |
d62a17ae | 256 | |
257 | len = h->nlmsg_len - NLMSG_LENGTH(sizeof(struct rtmsg)); | |
258 | if (len < 0) | |
259 | return -1; | |
260 | ||
261 | memset(tb, 0, sizeof tb); | |
262 | netlink_parse_rtattr(tb, RTA_MAX, RTM_RTA(rtm), len); | |
263 | ||
264 | if (rtm->rtm_flags & RTM_F_CLONED) | |
265 | return 0; | |
266 | if (rtm->rtm_protocol == RTPROT_REDIRECT) | |
267 | return 0; | |
268 | if (rtm->rtm_protocol == RTPROT_KERNEL) | |
269 | return 0; | |
270 | ||
271 | if (!startup && is_selfroute(rtm->rtm_protocol) | |
272 | && h->nlmsg_type == RTM_NEWROUTE) | |
273 | return 0; | |
274 | ||
275 | /* We don't care about change notifications for the MPLS table. */ | |
276 | /* TODO: Revisit this. */ | |
277 | if (rtm->rtm_family == AF_MPLS) | |
278 | return 0; | |
279 | ||
280 | /* Table corresponding to route. */ | |
281 | if (tb[RTA_TABLE]) | |
282 | table = *(int *)RTA_DATA(tb[RTA_TABLE]); | |
283 | else | |
284 | table = rtm->rtm_table; | |
285 | ||
286 | /* Map to VRF */ | |
287 | vrf_id = vrf_lookup_by_table(table); | |
288 | if (vrf_id == VRF_DEFAULT) { | |
289 | if (!is_zebra_valid_kernel_table(table) | |
290 | && !is_zebra_main_routing_table(table)) | |
291 | return 0; | |
292 | } | |
293 | ||
294 | /* Route which inserted by Zebra. */ | |
915902cb | 295 | if (is_selfroute(rtm->rtm_protocol)) { |
d62a17ae | 296 | flags |= ZEBRA_FLAG_SELFROUTE; |
915902cb DS |
297 | proto = proto2zebra(rtm->rtm_protocol, rtm->rtm_family); |
298 | } | |
d62a17ae | 299 | if (tb[RTA_OIF]) |
300 | index = *(int *)RTA_DATA(tb[RTA_OIF]); | |
301 | ||
302 | if (tb[RTA_DST]) | |
303 | dest = RTA_DATA(tb[RTA_DST]); | |
304 | else | |
305 | dest = anyaddr; | |
306 | ||
307 | if (tb[RTA_SRC]) | |
308 | src = RTA_DATA(tb[RTA_SRC]); | |
309 | else | |
310 | src = anyaddr; | |
311 | ||
312 | if (tb[RTA_PREFSRC]) | |
313 | prefsrc = RTA_DATA(tb[RTA_PREFSRC]); | |
314 | ||
315 | if (tb[RTA_GATEWAY]) | |
316 | gate = RTA_DATA(tb[RTA_GATEWAY]); | |
317 | ||
f19435a8 DS |
318 | if (tb[RTA_PRIORITY]) |
319 | metric = *(int *)RTA_DATA(tb[RTA_PRIORITY]); | |
d62a17ae | 320 | |
f19435a8 DS |
321 | if (tb[RTA_METRICS]) { |
322 | struct rtattr *mxrta[RTAX_MAX + 1]; | |
d62a17ae | 323 | |
f19435a8 DS |
324 | memset(mxrta, 0, sizeof mxrta); |
325 | netlink_parse_rtattr(mxrta, RTAX_MAX, | |
326 | RTA_DATA(tb[RTA_METRICS]), | |
327 | RTA_PAYLOAD(tb[RTA_METRICS])); | |
d62a17ae | 328 | |
f19435a8 DS |
329 | if (mxrta[RTAX_MTU]) |
330 | mtu = *(u_int32_t *)RTA_DATA(mxrta[RTAX_MTU]); | |
d62a17ae | 331 | } |
332 | ||
333 | if (rtm->rtm_family == AF_INET) { | |
334 | p.family = AF_INET; | |
335 | memcpy(&p.u.prefix4, dest, 4); | |
336 | p.prefixlen = rtm->rtm_dst_len; | |
337 | ||
338 | src_p.prefixlen = | |
339 | 0; // Forces debug below to not display anything | |
340 | } else if (rtm->rtm_family == AF_INET6) { | |
341 | p.family = AF_INET6; | |
342 | memcpy(&p.u.prefix6, dest, 16); | |
343 | p.prefixlen = rtm->rtm_dst_len; | |
344 | ||
345 | src_p.family = AF_INET6; | |
346 | memcpy(&src_p.prefix, src, 16); | |
347 | src_p.prefixlen = rtm->rtm_src_len; | |
348 | } | |
349 | ||
350 | if (rtm->rtm_src_len != 0) { | |
351 | char buf[PREFIX_STRLEN]; | |
352 | zlog_warn( | |
353 | "unsupported IPv[4|6] sourcedest route (dest %s vrf %u)", | |
354 | prefix2str(&p, buf, sizeof(buf)), vrf_id); | |
355 | return 0; | |
356 | } | |
357 | ||
25715c7e DS |
358 | /* |
359 | * For ZEBRA_ROUTE_KERNEL types: | |
360 | * | |
361 | * The metric/priority of the route received from the kernel | |
362 | * is a 32 bit number. We are going to interpret the high | |
363 | * order byte as the Admin Distance and the low order 3 bytes | |
364 | * as the metric. | |
365 | * | |
366 | * This will allow us to do two things: | |
367 | * 1) Allow the creation of kernel routes that can be | |
368 | * overridden by zebra. | |
369 | * 2) Allow the old behavior for 'most' kernel route types | |
370 | * if a user enters 'ip route ...' v4 routes get a metric | |
371 | * of 0 and v6 routes get a metric of 1024. Both of these | |
372 | * values will end up with a admin distance of 0, which | |
373 | * will cause them to win for the purposes of zebra. | |
374 | */ | |
375 | if (proto == ZEBRA_ROUTE_KERNEL) { | |
376 | distance = (metric >> 24) & 0xFF; | |
377 | metric = (metric & 0x00FFFFFF); | |
378 | } | |
379 | ||
d62a17ae | 380 | if (IS_ZEBRA_DEBUG_KERNEL) { |
381 | char buf[PREFIX_STRLEN]; | |
382 | char buf2[PREFIX_STRLEN]; | |
383 | zlog_debug( | |
25715c7e | 384 | "%s %s%s%s vrf %u metric: %d Admin Distance: %d", nl_msg_type_to_str(h->nlmsg_type), |
d62a17ae | 385 | prefix2str(&p, buf, sizeof(buf)), |
386 | src_p.prefixlen ? " from " : "", | |
387 | src_p.prefixlen ? prefix2str(&src_p, buf2, sizeof(buf2)) | |
388 | : "", | |
25715c7e | 389 | vrf_id, metric, distance); |
d62a17ae | 390 | } |
391 | ||
392 | afi_t afi = AFI_IP; | |
393 | if (rtm->rtm_family == AF_INET6) | |
394 | afi = AFI_IP6; | |
395 | ||
396 | if (h->nlmsg_type == RTM_NEWROUTE) { | |
fd36be7e DL |
397 | if (!tb[RTA_MULTIPATH]) { |
398 | struct nexthop nh; | |
399 | size_t sz = (afi == AFI_IP) ? 4 : 16; | |
400 | ||
401 | memset(&nh, 0, sizeof(nh)); | |
af760ec1 DS |
402 | |
403 | if (bh_type == BLACKHOLE_UNSPEC) { | |
404 | if (index && !gate) | |
405 | nh.type = NEXTHOP_TYPE_IFINDEX; | |
406 | else if (index && gate) | |
1dca2eaa | 407 | nh.type = (afi == AFI_IP) |
af760ec1 DS |
408 | ? NEXTHOP_TYPE_IPV4_IFINDEX |
409 | : NEXTHOP_TYPE_IPV6_IFINDEX; | |
410 | else if (!index && gate) | |
1dca2eaa RW |
411 | nh.type = (afi == AFI_IP) |
412 | ? NEXTHOP_TYPE_IPV4 | |
413 | : NEXTHOP_TYPE_IPV6; | |
af760ec1 DS |
414 | else { |
415 | nh.type = NEXTHOP_TYPE_BLACKHOLE; | |
416 | nh.bh_type = bh_type; | |
417 | } | |
418 | } else { | |
fd36be7e | 419 | nh.type = NEXTHOP_TYPE_BLACKHOLE; |
e655a03c DL |
420 | nh.bh_type = bh_type; |
421 | } | |
fd36be7e DL |
422 | nh.ifindex = index; |
423 | if (prefsrc) | |
424 | memcpy(&nh.src, prefsrc, sz); | |
425 | if (gate) | |
426 | memcpy(&nh.gate, gate, sz); | |
915902cb DS |
427 | |
428 | rib_add(afi, SAFI_UNICAST, vrf_id, proto, | |
25715c7e | 429 | 0, flags, &p, NULL, &nh, table, metric, mtu, distance); |
fd36be7e | 430 | } else { |
d62a17ae | 431 | /* This is a multipath route */ |
432 | ||
433 | struct route_entry *re; | |
434 | struct rtnexthop *rtnh = | |
435 | (struct rtnexthop *)RTA_DATA(tb[RTA_MULTIPATH]); | |
436 | ||
437 | len = RTA_PAYLOAD(tb[RTA_MULTIPATH]); | |
438 | ||
439 | re = XCALLOC(MTYPE_RE, sizeof(struct route_entry)); | |
915902cb | 440 | re->type = proto; |
25715c7e | 441 | re->distance = distance; |
d62a17ae | 442 | re->flags = flags; |
443 | re->metric = metric; | |
444 | re->mtu = mtu; | |
445 | re->vrf_id = vrf_id; | |
446 | re->table = table; | |
447 | re->nexthop_num = 0; | |
448 | re->uptime = time(NULL); | |
449 | ||
450 | for (;;) { | |
451 | if (len < (int)sizeof(*rtnh) | |
452 | || rtnh->rtnh_len > len) | |
453 | break; | |
454 | ||
455 | index = rtnh->rtnh_ifindex; | |
456 | gate = 0; | |
457 | if (rtnh->rtnh_len > sizeof(*rtnh)) { | |
458 | memset(tb, 0, sizeof(tb)); | |
459 | netlink_parse_rtattr( | |
460 | tb, RTA_MAX, RTNH_DATA(rtnh), | |
461 | rtnh->rtnh_len - sizeof(*rtnh)); | |
462 | if (tb[RTA_GATEWAY]) | |
463 | gate = RTA_DATA( | |
464 | tb[RTA_GATEWAY]); | |
465 | } | |
466 | ||
467 | if (gate) { | |
468 | if (rtm->rtm_family == AF_INET) { | |
469 | if (index) | |
470 | route_entry_nexthop_ipv4_ifindex_add( | |
471 | re, gate, | |
472 | prefsrc, index); | |
473 | else | |
474 | route_entry_nexthop_ipv4_add( | |
475 | re, gate, | |
476 | prefsrc); | |
477 | } else if (rtm->rtm_family | |
478 | == AF_INET6) { | |
479 | if (index) | |
480 | route_entry_nexthop_ipv6_ifindex_add( | |
481 | re, gate, | |
482 | index); | |
483 | else | |
484 | route_entry_nexthop_ipv6_add( | |
485 | re, gate); | |
486 | } | |
487 | } else | |
488 | route_entry_nexthop_ifindex_add(re, | |
489 | index); | |
490 | ||
491 | len -= NLMSG_ALIGN(rtnh->rtnh_len); | |
492 | rtnh = RTNH_NEXT(rtnh); | |
493 | } | |
494 | ||
495 | zserv_nexthop_num_warn(__func__, | |
496 | (const struct prefix *)&p, | |
497 | re->nexthop_num); | |
498 | if (re->nexthop_num == 0) | |
499 | XFREE(MTYPE_RE, re); | |
500 | else | |
7990990e | 501 | rib_add_multipath(afi, SAFI_UNICAST, &p, |
d62a17ae | 502 | NULL, re); |
503 | } | |
504 | } else { | |
fd36be7e DL |
505 | if (!tb[RTA_MULTIPATH]) { |
506 | struct nexthop nh; | |
507 | size_t sz = (afi == AFI_IP) ? 4 : 16; | |
508 | ||
509 | memset(&nh, 0, sizeof(nh)); | |
8ba5bd58 RW |
510 | if (bh_type == BLACKHOLE_UNSPEC) { |
511 | if (index && !gate) | |
512 | nh.type = NEXTHOP_TYPE_IFINDEX; | |
513 | else if (index && gate) | |
514 | nh.type = | |
515 | (afi == AFI_IP) | |
516 | ? NEXTHOP_TYPE_IPV4_IFINDEX | |
517 | : NEXTHOP_TYPE_IPV6_IFINDEX; | |
518 | else if (!index && gate) | |
519 | nh.type = (afi == AFI_IP) | |
520 | ? NEXTHOP_TYPE_IPV4 | |
60466a63 | 521 | : NEXTHOP_TYPE_IPV6; |
8ba5bd58 RW |
522 | else { |
523 | nh.type = NEXTHOP_TYPE_BLACKHOLE; | |
524 | nh.bh_type = BLACKHOLE_UNSPEC; | |
525 | } | |
526 | } else { | |
fd36be7e | 527 | nh.type = NEXTHOP_TYPE_BLACKHOLE; |
8ba5bd58 RW |
528 | nh.bh_type = bh_type; |
529 | } | |
fd36be7e DL |
530 | nh.ifindex = index; |
531 | if (gate) | |
532 | memcpy(&nh.gate, gate, sz); | |
d62a17ae | 533 | rib_delete(afi, SAFI_UNICAST, vrf_id, |
915902cb | 534 | proto, 0, flags, &p, NULL, &nh, |
5dfeba19 | 535 | table, metric, true); |
fd36be7e DL |
536 | } else { |
537 | /* XXX: need to compare the entire list of nexthops | |
538 | * here for NLM_F_APPEND stupidity */ | |
539 | rib_delete(afi, SAFI_UNICAST, vrf_id, | |
915902cb | 540 | proto, 0, flags, &p, NULL, NULL, |
5dfeba19 | 541 | table, metric, true); |
d62a17ae | 542 | } |
543 | } | |
544 | ||
545 | return 0; | |
718e3744 | 546 | } |
547 | ||
e3be0432 DS |
548 | static struct mcast_route_data *mroute = NULL; |
549 | ||
d62a17ae | 550 | static int netlink_route_change_read_multicast(struct sockaddr_nl *snl, |
551 | struct nlmsghdr *h, | |
552 | ns_id_t ns_id, int startup) | |
565fdc75 | 553 | { |
d62a17ae | 554 | int len; |
555 | struct rtmsg *rtm; | |
556 | struct rtattr *tb[RTA_MAX + 1]; | |
557 | struct mcast_route_data *m; | |
558 | struct mcast_route_data mr; | |
559 | int iif = 0; | |
560 | int count; | |
561 | int oif[256]; | |
562 | int oif_count = 0; | |
563 | char sbuf[40]; | |
564 | char gbuf[40]; | |
565 | char oif_list[256] = "\0"; | |
566 | vrf_id_t vrf = ns_id; | |
43b5cc5e | 567 | int table; |
d62a17ae | 568 | |
569 | if (mroute) | |
570 | m = mroute; | |
571 | else { | |
572 | memset(&mr, 0, sizeof(mr)); | |
573 | m = &mr; | |
574 | } | |
575 | ||
576 | rtm = NLMSG_DATA(h); | |
577 | ||
578 | len = h->nlmsg_len - NLMSG_LENGTH(sizeof(struct rtmsg)); | |
579 | ||
580 | memset(tb, 0, sizeof tb); | |
581 | netlink_parse_rtattr(tb, RTA_MAX, RTM_RTA(rtm), len); | |
90d82769 | 582 | |
43b5cc5e DS |
583 | if (tb[RTA_TABLE]) |
584 | table = *(int *)RTA_DATA(tb[RTA_TABLE]); | |
585 | else | |
586 | table = rtm->rtm_table; | |
587 | ||
588 | vrf = vrf_lookup_by_table(table); | |
589 | ||
d62a17ae | 590 | if (tb[RTA_IIF]) |
591 | iif = *(int *)RTA_DATA(tb[RTA_IIF]); | |
592 | ||
593 | if (tb[RTA_SRC]) | |
bd8b9272 | 594 | m->sg.src = *(struct in_addr *)RTA_DATA(tb[RTA_SRC]); |
d62a17ae | 595 | |
596 | if (tb[RTA_DST]) | |
bd8b9272 | 597 | m->sg.grp = *(struct in_addr *)RTA_DATA(tb[RTA_DST]); |
d62a17ae | 598 | |
599 | if ((RTA_EXPIRES <= RTA_MAX) && tb[RTA_EXPIRES]) | |
600 | m->lastused = *(unsigned long long *)RTA_DATA(tb[RTA_EXPIRES]); | |
601 | ||
602 | if (tb[RTA_MULTIPATH]) { | |
603 | struct rtnexthop *rtnh = | |
604 | (struct rtnexthop *)RTA_DATA(tb[RTA_MULTIPATH]); | |
605 | ||
606 | len = RTA_PAYLOAD(tb[RTA_MULTIPATH]); | |
607 | for (;;) { | |
608 | if (len < (int)sizeof(*rtnh) || rtnh->rtnh_len > len) | |
609 | break; | |
610 | ||
611 | oif[oif_count] = rtnh->rtnh_ifindex; | |
612 | oif_count++; | |
613 | ||
614 | len -= NLMSG_ALIGN(rtnh->rtnh_len); | |
615 | rtnh = RTNH_NEXT(rtnh); | |
616 | } | |
617 | } | |
618 | ||
619 | if (IS_ZEBRA_DEBUG_KERNEL) { | |
620 | struct interface *ifp; | |
0af35d90 RW |
621 | strlcpy(sbuf, inet_ntoa(m->sg.src), sizeof(sbuf)); |
622 | strlcpy(gbuf, inet_ntoa(m->sg.grp), sizeof(gbuf)); | |
d62a17ae | 623 | for (count = 0; count < oif_count; count++) { |
624 | ifp = if_lookup_by_index(oif[count], vrf); | |
625 | char temp[256]; | |
626 | ||
627 | sprintf(temp, "%s ", ifp->name); | |
628 | strcat(oif_list, temp); | |
629 | } | |
43b5cc5e | 630 | struct zebra_vrf *zvrf = zebra_vrf_lookup_by_id(vrf); |
d62a17ae | 631 | ifp = if_lookup_by_index(iif, vrf); |
43b5cc5e DS |
632 | zlog_debug( |
633 | "MCAST VRF: %s(%d) %s (%s,%s) IIF: %s OIF: %s jiffies: %lld", | |
634 | zvrf->vrf->name, vrf, nl_msg_type_to_str(h->nlmsg_type), | |
635 | sbuf, gbuf, ifp->name, oif_list, m->lastused); | |
90d82769 | 636 | } |
d62a17ae | 637 | return 0; |
565fdc75 DS |
638 | } |
639 | ||
d62a17ae | 640 | int netlink_route_change(struct sockaddr_nl *snl, struct nlmsghdr *h, |
641 | ns_id_t ns_id, int startup) | |
565fdc75 | 642 | { |
d62a17ae | 643 | int len; |
644 | vrf_id_t vrf_id = ns_id; | |
645 | struct rtmsg *rtm; | |
646 | ||
647 | rtm = NLMSG_DATA(h); | |
648 | ||
649 | if (!(h->nlmsg_type == RTM_NEWROUTE || h->nlmsg_type == RTM_DELROUTE)) { | |
650 | /* If this is not route add/delete message print warning. */ | |
651 | zlog_warn("Kernel message: %d vrf %u\n", h->nlmsg_type, vrf_id); | |
652 | return 0; | |
653 | } | |
654 | ||
655 | /* Connected route. */ | |
656 | if (IS_ZEBRA_DEBUG_KERNEL) | |
657 | zlog_debug("%s %s %s proto %s vrf %u", | |
658 | nl_msg_type_to_str(h->nlmsg_type), | |
659 | nl_family_to_str(rtm->rtm_family), | |
660 | nl_rttype_to_str(rtm->rtm_type), | |
661 | nl_rtproto_to_str(rtm->rtm_protocol), vrf_id); | |
662 | ||
663 | /* We don't care about change notifications for the MPLS table. */ | |
664 | /* TODO: Revisit this. */ | |
665 | if (rtm->rtm_family == AF_MPLS) | |
666 | return 0; | |
667 | ||
668 | len = h->nlmsg_len - NLMSG_LENGTH(sizeof(struct rtmsg)); | |
669 | if (len < 0) | |
670 | return -1; | |
671 | ||
e655a03c | 672 | if (rtm->rtm_type == RTN_MULTICAST) |
d62a17ae | 673 | netlink_route_change_read_multicast(snl, h, ns_id, startup); |
e655a03c DL |
674 | else |
675 | netlink_route_change_read_unicast(snl, h, ns_id, startup); | |
d62a17ae | 676 | return 0; |
565fdc75 DS |
677 | } |
678 | ||
289602d7 | 679 | /* Request for specific route information from the kernel */ |
d62a17ae | 680 | static int netlink_request_route(struct zebra_ns *zns, int family, int type) |
289602d7 | 681 | { |
d62a17ae | 682 | struct { |
683 | struct nlmsghdr n; | |
684 | struct rtmsg rtm; | |
685 | } req; | |
686 | ||
687 | /* Form the request, specifying filter (rtattr) if needed. */ | |
688 | memset(&req, 0, sizeof(req)); | |
689 | req.n.nlmsg_type = type; | |
690 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)); | |
691 | req.rtm.rtm_family = family; | |
692 | ||
693 | return netlink_request(&zns->netlink_cmd, &req.n); | |
289602d7 | 694 | } |
695 | ||
718e3744 | 696 | /* Routing table read function using netlink interface. Only called |
697 | bootstrap time. */ | |
d62a17ae | 698 | int netlink_route_read(struct zebra_ns *zns) |
718e3744 | 699 | { |
d62a17ae | 700 | int ret; |
701 | ||
702 | /* Get IPv4 routing table. */ | |
703 | ret = netlink_request_route(zns, AF_INET, RTM_GETROUTE); | |
704 | if (ret < 0) | |
705 | return ret; | |
706 | ret = netlink_parse_info(netlink_route_change_read_unicast, | |
707 | &zns->netlink_cmd, zns, 0, 1); | |
708 | if (ret < 0) | |
709 | return ret; | |
710 | ||
711 | /* Get IPv6 routing table. */ | |
712 | ret = netlink_request_route(zns, AF_INET6, RTM_GETROUTE); | |
713 | if (ret < 0) | |
714 | return ret; | |
715 | ret = netlink_parse_info(netlink_route_change_read_unicast, | |
716 | &zns->netlink_cmd, zns, 0, 1); | |
717 | if (ret < 0) | |
718 | return ret; | |
719 | ||
720 | return 0; | |
718e3744 | 721 | } |
722 | ||
d62a17ae | 723 | static void _netlink_route_nl_add_gateway_info(u_char route_family, |
724 | u_char gw_family, | |
725 | struct nlmsghdr *nlmsg, | |
726 | size_t req_size, int bytelen, | |
727 | struct nexthop *nexthop) | |
40c7bdb0 | 728 | { |
d62a17ae | 729 | if (route_family == AF_MPLS) { |
730 | struct gw_family_t gw_fam; | |
731 | ||
732 | gw_fam.family = gw_family; | |
733 | if (gw_family == AF_INET) | |
734 | memcpy(&gw_fam.gate.ipv4, &nexthop->gate.ipv4, bytelen); | |
735 | else | |
736 | memcpy(&gw_fam.gate.ipv6, &nexthop->gate.ipv6, bytelen); | |
737 | addattr_l(nlmsg, req_size, RTA_VIA, &gw_fam.family, | |
738 | bytelen + 2); | |
739 | } else { | |
740 | if (gw_family == AF_INET) | |
741 | addattr_l(nlmsg, req_size, RTA_GATEWAY, | |
742 | &nexthop->gate.ipv4, bytelen); | |
743 | else | |
744 | addattr_l(nlmsg, req_size, RTA_GATEWAY, | |
745 | &nexthop->gate.ipv6, bytelen); | |
746 | } | |
40c7bdb0 | 747 | } |
748 | ||
d62a17ae | 749 | static void _netlink_route_rta_add_gateway_info(u_char route_family, |
750 | u_char gw_family, | |
751 | struct rtattr *rta, | |
752 | struct rtnexthop *rtnh, | |
753 | size_t req_size, int bytelen, | |
754 | struct nexthop *nexthop) | |
40c7bdb0 | 755 | { |
d62a17ae | 756 | if (route_family == AF_MPLS) { |
757 | struct gw_family_t gw_fam; | |
758 | ||
759 | gw_fam.family = gw_family; | |
760 | if (gw_family == AF_INET) | |
761 | memcpy(&gw_fam.gate.ipv4, &nexthop->gate.ipv4, bytelen); | |
762 | else | |
763 | memcpy(&gw_fam.gate.ipv6, &nexthop->gate.ipv6, bytelen); | |
764 | rta_addattr_l(rta, req_size, RTA_VIA, &gw_fam.family, | |
765 | bytelen + 2); | |
766 | rtnh->rtnh_len += RTA_LENGTH(bytelen + 2); | |
767 | } else { | |
768 | if (gw_family == AF_INET) | |
769 | rta_addattr_l(rta, req_size, RTA_GATEWAY, | |
770 | &nexthop->gate.ipv4, bytelen); | |
771 | else | |
772 | rta_addattr_l(rta, req_size, RTA_GATEWAY, | |
773 | &nexthop->gate.ipv6, bytelen); | |
774 | rtnh->rtnh_len += sizeof(struct rtattr) + bytelen; | |
775 | } | |
40c7bdb0 | 776 | } |
777 | ||
fa713d9e CF |
778 | /* This function takes a nexthop as argument and adds |
779 | * the appropriate netlink attributes to an existing | |
780 | * netlink message. | |
781 | * | |
782 | * @param routedesc: Human readable description of route type | |
783 | * (direct/recursive, single-/multipath) | |
784 | * @param bytelen: Length of addresses in bytes. | |
785 | * @param nexthop: Nexthop information | |
786 | * @param nlmsg: nlmsghdr structure to fill in. | |
787 | * @param req_size: The size allocated for the message. | |
788 | */ | |
d62a17ae | 789 | static void _netlink_route_build_singlepath(const char *routedesc, int bytelen, |
790 | struct nexthop *nexthop, | |
791 | struct nlmsghdr *nlmsg, | |
792 | struct rtmsg *rtmsg, | |
793 | size_t req_size, int cmd) | |
fa713d9e | 794 | { |
d62a17ae | 795 | struct nexthop_label *nh_label; |
796 | mpls_lse_t out_lse[MPLS_MAX_LABELS]; | |
9a62e84b | 797 | char label_buf[256]; |
d62a17ae | 798 | |
799 | /* | |
800 | * label_buf is *only* currently used within debugging. | |
801 | * As such when we assign it we are guarding it inside | |
802 | * a debug test. If you want to change this make sure | |
803 | * you fix this assumption | |
804 | */ | |
805 | label_buf[0] = '\0'; | |
806 | /* outgoing label - either as NEWDST (in the case of LSR) or as ENCAP | |
807 | * (in the case of LER) | |
808 | */ | |
809 | nh_label = nexthop->nh_label; | |
810 | if (rtmsg->rtm_family == AF_MPLS) { | |
811 | assert(nh_label); | |
812 | assert(nh_label->num_labels == 1); | |
813 | } | |
814 | ||
815 | if (nh_label && nh_label->num_labels) { | |
816 | int i, num_labels = 0; | |
817 | u_int32_t bos; | |
818 | char label_buf1[20]; | |
819 | ||
820 | for (i = 0; i < nh_label->num_labels; i++) { | |
821 | if (nh_label->label[i] != MPLS_IMP_NULL_LABEL) { | |
822 | bos = ((i == (nh_label->num_labels - 1)) ? 1 | |
823 | : 0); | |
824 | out_lse[i] = mpls_lse_encode(nh_label->label[i], | |
825 | 0, 0, bos); | |
826 | if (IS_ZEBRA_DEBUG_KERNEL) { | |
827 | if (!num_labels) | |
9a62e84b | 828 | sprintf(label_buf, "label %u", |
d62a17ae | 829 | nh_label->label[i]); |
830 | else { | |
9a62e84b | 831 | sprintf(label_buf1, "/%u", |
d62a17ae | 832 | nh_label->label[i]); |
9a62e84b RW |
833 | strlcat(label_buf, label_buf1, |
834 | sizeof(label_buf)); | |
d62a17ae | 835 | } |
836 | } | |
837 | num_labels++; | |
838 | } | |
839 | } | |
840 | if (num_labels) { | |
841 | if (rtmsg->rtm_family == AF_MPLS) | |
842 | addattr_l(nlmsg, req_size, RTA_NEWDST, &out_lse, | |
843 | num_labels * sizeof(mpls_lse_t)); | |
844 | else { | |
845 | struct rtattr *nest; | |
846 | u_int16_t encap = LWTUNNEL_ENCAP_MPLS; | |
847 | ||
848 | addattr_l(nlmsg, req_size, RTA_ENCAP_TYPE, | |
849 | &encap, sizeof(u_int16_t)); | |
850 | nest = addattr_nest(nlmsg, req_size, RTA_ENCAP); | |
851 | addattr_l(nlmsg, req_size, MPLS_IPTUNNEL_DST, | |
852 | &out_lse, | |
853 | num_labels * sizeof(mpls_lse_t)); | |
854 | addattr_nest_end(nlmsg, nest); | |
855 | } | |
66d42727 | 856 | } |
0aabccc0 | 857 | } |
fa713d9e | 858 | |
d62a17ae | 859 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ONLINK)) |
860 | rtmsg->rtm_flags |= RTNH_F_ONLINK; | |
861 | ||
862 | if (rtmsg->rtm_family == AF_INET | |
863 | && (nexthop->type == NEXTHOP_TYPE_IPV6 | |
864 | || nexthop->type == NEXTHOP_TYPE_IPV6_IFINDEX)) { | |
865 | rtmsg->rtm_flags |= RTNH_F_ONLINK; | |
866 | addattr_l(nlmsg, req_size, RTA_GATEWAY, &ipv4_ll, 4); | |
867 | addattr32(nlmsg, req_size, RTA_OIF, nexthop->ifindex); | |
868 | ||
869 | if (nexthop->rmap_src.ipv4.s_addr && (cmd == RTM_NEWROUTE)) | |
870 | addattr_l(nlmsg, req_size, RTA_PREFSRC, | |
871 | &nexthop->rmap_src.ipv4, bytelen); | |
872 | else if (nexthop->src.ipv4.s_addr && (cmd == RTM_NEWROUTE)) | |
873 | addattr_l(nlmsg, req_size, RTA_PREFSRC, | |
874 | &nexthop->src.ipv4, bytelen); | |
875 | ||
876 | if (IS_ZEBRA_DEBUG_KERNEL) | |
877 | zlog_debug( | |
878 | " 5549: _netlink_route_build_singlepath() (%s): " | |
879 | "nexthop via %s %s if %u", | |
880 | routedesc, ipv4_ll_buf, label_buf, | |
881 | nexthop->ifindex); | |
882 | return; | |
0aabccc0 DD |
883 | } |
884 | ||
d62a17ae | 885 | if (nexthop->type == NEXTHOP_TYPE_IPV4 |
886 | || nexthop->type == NEXTHOP_TYPE_IPV4_IFINDEX) { | |
887 | /* Send deletes to the kernel without specifying the next-hop */ | |
888 | if (cmd != RTM_DELROUTE) | |
889 | _netlink_route_nl_add_gateway_info( | |
890 | rtmsg->rtm_family, AF_INET, nlmsg, req_size, | |
891 | bytelen, nexthop); | |
892 | ||
893 | if (cmd == RTM_NEWROUTE) { | |
894 | if (nexthop->rmap_src.ipv4.s_addr) | |
895 | addattr_l(nlmsg, req_size, RTA_PREFSRC, | |
896 | &nexthop->rmap_src.ipv4, bytelen); | |
897 | else if (nexthop->src.ipv4.s_addr) | |
898 | addattr_l(nlmsg, req_size, RTA_PREFSRC, | |
899 | &nexthop->src.ipv4, bytelen); | |
900 | } | |
901 | ||
902 | if (IS_ZEBRA_DEBUG_KERNEL) | |
903 | zlog_debug( | |
904 | "netlink_route_multipath() (%s): " | |
905 | "nexthop via %s %s if %u", | |
906 | routedesc, inet_ntoa(nexthop->gate.ipv4), | |
907 | label_buf, nexthop->ifindex); | |
0aabccc0 | 908 | } |
fa713d9e | 909 | |
d62a17ae | 910 | if (nexthop->type == NEXTHOP_TYPE_IPV6 |
911 | || nexthop->type == NEXTHOP_TYPE_IPV6_IFINDEX) { | |
912 | _netlink_route_nl_add_gateway_info(rtmsg->rtm_family, AF_INET6, | |
913 | nlmsg, req_size, bytelen, | |
914 | nexthop); | |
915 | ||
916 | if (cmd == RTM_NEWROUTE) { | |
917 | if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->rmap_src.ipv6)) | |
918 | addattr_l(nlmsg, req_size, RTA_PREFSRC, | |
919 | &nexthop->rmap_src.ipv6, bytelen); | |
920 | else if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->src.ipv6)) | |
921 | addattr_l(nlmsg, req_size, RTA_PREFSRC, | |
922 | &nexthop->src.ipv6, bytelen); | |
923 | } | |
fa713d9e | 924 | |
d62a17ae | 925 | if (IS_ZEBRA_DEBUG_KERNEL) |
926 | zlog_debug( | |
927 | "netlink_route_multipath() (%s): " | |
928 | "nexthop via %s %s if %u", | |
929 | routedesc, inet6_ntoa(nexthop->gate.ipv6), | |
930 | label_buf, nexthop->ifindex); | |
931 | } | |
932 | if (nexthop->type == NEXTHOP_TYPE_IFINDEX | |
933 | || nexthop->type == NEXTHOP_TYPE_IPV4_IFINDEX) { | |
934 | addattr32(nlmsg, req_size, RTA_OIF, nexthop->ifindex); | |
935 | ||
936 | if (cmd == RTM_NEWROUTE) { | |
937 | if (nexthop->rmap_src.ipv4.s_addr) | |
938 | addattr_l(nlmsg, req_size, RTA_PREFSRC, | |
939 | &nexthop->rmap_src.ipv4, bytelen); | |
940 | else if (nexthop->src.ipv4.s_addr) | |
941 | addattr_l(nlmsg, req_size, RTA_PREFSRC, | |
942 | &nexthop->src.ipv4, bytelen); | |
943 | } | |
fa713d9e | 944 | |
d62a17ae | 945 | if (IS_ZEBRA_DEBUG_KERNEL) |
946 | zlog_debug( | |
947 | "netlink_route_multipath() (%s): " | |
948 | "nexthop via if %u", | |
949 | routedesc, nexthop->ifindex); | |
0aabccc0 DD |
950 | } |
951 | ||
d62a17ae | 952 | if (nexthop->type == NEXTHOP_TYPE_IPV6_IFINDEX) { |
953 | addattr32(nlmsg, req_size, RTA_OIF, nexthop->ifindex); | |
954 | ||
955 | if (cmd == RTM_NEWROUTE) { | |
956 | if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->rmap_src.ipv6)) | |
957 | addattr_l(nlmsg, req_size, RTA_PREFSRC, | |
958 | &nexthop->rmap_src.ipv6, bytelen); | |
959 | else if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->src.ipv6)) | |
960 | addattr_l(nlmsg, req_size, RTA_PREFSRC, | |
961 | &nexthop->src.ipv6, bytelen); | |
962 | } | |
963 | ||
964 | if (IS_ZEBRA_DEBUG_KERNEL) | |
965 | zlog_debug( | |
966 | "netlink_route_multipath() (%s): " | |
967 | "nexthop via if %u", | |
968 | routedesc, nexthop->ifindex); | |
969 | } | |
fa713d9e CF |
970 | } |
971 | ||
972 | /* This function takes a nexthop as argument and | |
973 | * appends to the given rtattr/rtnexthop pair the | |
974 | * representation of the nexthop. If the nexthop | |
975 | * defines a preferred source, the src parameter | |
976 | * will be modified to point to that src, otherwise | |
977 | * it will be kept unmodified. | |
978 | * | |
979 | * @param routedesc: Human readable description of route type | |
980 | * (direct/recursive, single-/multipath) | |
981 | * @param bytelen: Length of addresses in bytes. | |
982 | * @param nexthop: Nexthop information | |
983 | * @param rta: rtnetlink attribute structure | |
984 | * @param rtnh: pointer to an rtnetlink nexthop structure | |
985 | * @param src: pointer pointing to a location where | |
986 | * the prefsrc should be stored. | |
987 | */ | |
d62a17ae | 988 | static void _netlink_route_build_multipath(const char *routedesc, int bytelen, |
989 | struct nexthop *nexthop, | |
990 | struct rtattr *rta, | |
991 | struct rtnexthop *rtnh, | |
992 | struct rtmsg *rtmsg, | |
993 | union g_addr **src) | |
fa713d9e | 994 | { |
d62a17ae | 995 | struct nexthop_label *nh_label; |
996 | mpls_lse_t out_lse[MPLS_MAX_LABELS]; | |
9a62e84b | 997 | char label_buf[256]; |
d62a17ae | 998 | |
999 | rtnh->rtnh_len = sizeof(*rtnh); | |
1000 | rtnh->rtnh_flags = 0; | |
1001 | rtnh->rtnh_hops = 0; | |
1002 | rta->rta_len += rtnh->rtnh_len; | |
1003 | ||
1004 | /* | |
1005 | * label_buf is *only* currently used within debugging. | |
1006 | * As such when we assign it we are guarding it inside | |
1007 | * a debug test. If you want to change this make sure | |
1008 | * you fix this assumption | |
1009 | */ | |
1010 | label_buf[0] = '\0'; | |
1011 | /* outgoing label - either as NEWDST (in the case of LSR) or as ENCAP | |
1012 | * (in the case of LER) | |
1013 | */ | |
1014 | nh_label = nexthop->nh_label; | |
1015 | if (rtmsg->rtm_family == AF_MPLS) { | |
1016 | assert(nh_label); | |
1017 | assert(nh_label->num_labels == 1); | |
1018 | } | |
1019 | ||
1020 | if (nh_label && nh_label->num_labels) { | |
1021 | int i, num_labels = 0; | |
1022 | u_int32_t bos; | |
1023 | char label_buf1[20]; | |
1024 | ||
1025 | for (i = 0; i < nh_label->num_labels; i++) { | |
1026 | if (nh_label->label[i] != MPLS_IMP_NULL_LABEL) { | |
1027 | bos = ((i == (nh_label->num_labels - 1)) ? 1 | |
1028 | : 0); | |
1029 | out_lse[i] = mpls_lse_encode(nh_label->label[i], | |
1030 | 0, 0, bos); | |
1031 | if (IS_ZEBRA_DEBUG_KERNEL) { | |
1032 | if (!num_labels) | |
9a62e84b | 1033 | sprintf(label_buf, "label %u", |
d62a17ae | 1034 | nh_label->label[i]); |
1035 | else { | |
9a62e84b | 1036 | sprintf(label_buf1, "/%u", |
d62a17ae | 1037 | nh_label->label[i]); |
9a62e84b RW |
1038 | strlcat(label_buf, label_buf1, |
1039 | sizeof(label_buf)); | |
d62a17ae | 1040 | } |
1041 | } | |
1042 | num_labels++; | |
1043 | } | |
1044 | } | |
1045 | if (num_labels) { | |
1046 | if (rtmsg->rtm_family == AF_MPLS) { | |
1047 | rta_addattr_l(rta, NL_PKT_BUF_SIZE, RTA_NEWDST, | |
1048 | &out_lse, | |
1049 | num_labels * sizeof(mpls_lse_t)); | |
1050 | rtnh->rtnh_len += RTA_LENGTH( | |
1051 | num_labels * sizeof(mpls_lse_t)); | |
1052 | } else { | |
1053 | struct rtattr *nest; | |
1054 | u_int16_t encap = LWTUNNEL_ENCAP_MPLS; | |
1055 | int len = rta->rta_len; | |
1056 | ||
1057 | rta_addattr_l(rta, NL_PKT_BUF_SIZE, | |
1058 | RTA_ENCAP_TYPE, &encap, | |
1059 | sizeof(u_int16_t)); | |
1060 | nest = rta_nest(rta, NL_PKT_BUF_SIZE, | |
1061 | RTA_ENCAP); | |
1062 | rta_addattr_l(rta, NL_PKT_BUF_SIZE, | |
1063 | MPLS_IPTUNNEL_DST, &out_lse, | |
1064 | num_labels * sizeof(mpls_lse_t)); | |
1065 | rta_nest_end(rta, nest); | |
1066 | rtnh->rtnh_len += rta->rta_len - len; | |
1067 | } | |
66d42727 | 1068 | } |
d62a17ae | 1069 | } |
1070 | ||
1071 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ONLINK)) | |
1072 | rtnh->rtnh_flags |= RTNH_F_ONLINK; | |
1073 | ||
1074 | if (rtmsg->rtm_family == AF_INET | |
1075 | && (nexthop->type == NEXTHOP_TYPE_IPV6 | |
1076 | || nexthop->type == NEXTHOP_TYPE_IPV6_IFINDEX)) { | |
1077 | bytelen = 4; | |
1078 | rtnh->rtnh_flags |= RTNH_F_ONLINK; | |
1079 | rta_addattr_l(rta, NL_PKT_BUF_SIZE, RTA_GATEWAY, &ipv4_ll, | |
1080 | bytelen); | |
1081 | rtnh->rtnh_len += sizeof(struct rtattr) + bytelen; | |
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 | " 5549: netlink_route_build_multipath() (%s): " | |
1092 | "nexthop via %s %s if %u", | |
1093 | routedesc, ipv4_ll_buf, label_buf, | |
1094 | nexthop->ifindex); | |
1095 | return; | |
1096 | } | |
1097 | ||
1098 | if (nexthop->type == NEXTHOP_TYPE_IPV4 | |
1099 | || nexthop->type == NEXTHOP_TYPE_IPV4_IFINDEX) { | |
1100 | _netlink_route_rta_add_gateway_info(rtmsg->rtm_family, AF_INET, | |
1101 | rta, rtnh, NL_PKT_BUF_SIZE, | |
1102 | bytelen, nexthop); | |
1103 | if (nexthop->rmap_src.ipv4.s_addr) | |
1104 | *src = &nexthop->rmap_src; | |
1105 | else if (nexthop->src.ipv4.s_addr) | |
1106 | *src = &nexthop->src; | |
1107 | ||
1108 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1109 | zlog_debug( | |
1110 | "netlink_route_multipath() (%s): " | |
1111 | "nexthop via %s %s if %u", | |
1112 | routedesc, inet_ntoa(nexthop->gate.ipv4), | |
1113 | label_buf, nexthop->ifindex); | |
1114 | } | |
1115 | if (nexthop->type == NEXTHOP_TYPE_IPV6 | |
1116 | || nexthop->type == NEXTHOP_TYPE_IPV6_IFINDEX) { | |
1117 | _netlink_route_rta_add_gateway_info(rtmsg->rtm_family, AF_INET6, | |
1118 | rta, rtnh, NL_PKT_BUF_SIZE, | |
1119 | bytelen, nexthop); | |
1120 | ||
1121 | if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->rmap_src.ipv6)) | |
1122 | *src = &nexthop->rmap_src; | |
1123 | else if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->src.ipv6)) | |
1124 | *src = &nexthop->src; | |
1125 | ||
1126 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1127 | zlog_debug( | |
1128 | "netlink_route_multipath() (%s): " | |
1129 | "nexthop via %s %s if %u", | |
1130 | routedesc, inet6_ntoa(nexthop->gate.ipv6), | |
1131 | label_buf, nexthop->ifindex); | |
1132 | } | |
1133 | /* ifindex */ | |
1134 | if (nexthop->type == NEXTHOP_TYPE_IPV4_IFINDEX | |
1135 | || nexthop->type == NEXTHOP_TYPE_IFINDEX) { | |
1136 | rtnh->rtnh_ifindex = nexthop->ifindex; | |
1137 | ||
1138 | if (nexthop->rmap_src.ipv4.s_addr) | |
1139 | *src = &nexthop->rmap_src; | |
1140 | else if (nexthop->src.ipv4.s_addr) | |
1141 | *src = &nexthop->src; | |
1142 | ||
1143 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1144 | zlog_debug( | |
1145 | "netlink_route_multipath() (%s): " | |
1146 | "nexthop via if %u", | |
1147 | routedesc, nexthop->ifindex); | |
1148 | } else if (nexthop->type == NEXTHOP_TYPE_IPV6_IFINDEX) { | |
1149 | rtnh->rtnh_ifindex = nexthop->ifindex; | |
1150 | ||
1151 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1152 | zlog_debug( | |
1153 | "netlink_route_multipath() (%s): " | |
1154 | "nexthop via if %u", | |
1155 | routedesc, nexthop->ifindex); | |
1156 | } else { | |
1157 | rtnh->rtnh_ifindex = 0; | |
1158 | } | |
fa713d9e CF |
1159 | } |
1160 | ||
d62a17ae | 1161 | static inline void _netlink_mpls_build_singlepath(const char *routedesc, |
1162 | zebra_nhlfe_t *nhlfe, | |
1163 | struct nlmsghdr *nlmsg, | |
1164 | struct rtmsg *rtmsg, | |
1165 | size_t req_size, int cmd) | |
40c7bdb0 | 1166 | { |
d62a17ae | 1167 | int bytelen; |
1168 | u_char family; | |
40c7bdb0 | 1169 | |
d62a17ae | 1170 | family = NHLFE_FAMILY(nhlfe); |
1171 | bytelen = (family == AF_INET ? 4 : 16); | |
1172 | _netlink_route_build_singlepath(routedesc, bytelen, nhlfe->nexthop, | |
1173 | nlmsg, rtmsg, req_size, cmd); | |
40c7bdb0 | 1174 | } |
1175 | ||
1176 | ||
1177 | static inline void | |
d62a17ae | 1178 | _netlink_mpls_build_multipath(const char *routedesc, zebra_nhlfe_t *nhlfe, |
1179 | struct rtattr *rta, struct rtnexthop *rtnh, | |
1180 | struct rtmsg *rtmsg, union g_addr **src) | |
40c7bdb0 | 1181 | { |
d62a17ae | 1182 | int bytelen; |
1183 | u_char family; | |
40c7bdb0 | 1184 | |
d62a17ae | 1185 | family = NHLFE_FAMILY(nhlfe); |
1186 | bytelen = (family == AF_INET ? 4 : 16); | |
1187 | _netlink_route_build_multipath(routedesc, bytelen, nhlfe->nexthop, rta, | |
1188 | rtnh, rtmsg, src); | |
40c7bdb0 | 1189 | } |
1190 | ||
1191 | ||
fa713d9e CF |
1192 | /* Log debug information for netlink_route_multipath |
1193 | * if debug logging is enabled. | |
1194 | * | |
1195 | * @param cmd: Netlink command which is to be processed | |
1196 | * @param p: Prefix for which the change is due | |
1197 | * @param nexthop: Nexthop which is currently processed | |
1198 | * @param routedesc: Semantic annotation for nexthop | |
1199 | * (recursive, multipath, etc.) | |
1200 | * @param family: Address family which the change concerns | |
1201 | */ | |
d62a17ae | 1202 | static void _netlink_route_debug(int cmd, struct prefix *p, |
1203 | struct nexthop *nexthop, const char *routedesc, | |
1204 | int family, struct zebra_vrf *zvrf) | |
fa713d9e | 1205 | { |
d62a17ae | 1206 | if (IS_ZEBRA_DEBUG_KERNEL) { |
1207 | char buf[PREFIX_STRLEN]; | |
1208 | zlog_debug( | |
1209 | "netlink_route_multipath() (%s): %s %s vrf %u type %s", | |
1210 | routedesc, nl_msg_type_to_str(cmd), | |
1211 | prefix2str(p, buf, sizeof(buf)), zvrf_id(zvrf), | |
1212 | (nexthop) ? nexthop_type_to_str(nexthop->type) : "UNK"); | |
1213 | } | |
1214 | } | |
1215 | ||
1216 | static void _netlink_mpls_debug(int cmd, u_int32_t label, const char *routedesc) | |
40c7bdb0 | 1217 | { |
d62a17ae | 1218 | if (IS_ZEBRA_DEBUG_KERNEL) |
1219 | zlog_debug("netlink_mpls_multipath() (%s): %s %u/20", routedesc, | |
1220 | nl_msg_type_to_str(cmd), label); | |
fa713d9e CF |
1221 | } |
1222 | ||
d62a17ae | 1223 | static int netlink_neigh_update(int cmd, int ifindex, uint32_t addr, char *lla, |
1224 | int llalen) | |
5c610faf | 1225 | { |
d62a17ae | 1226 | struct { |
1227 | struct nlmsghdr n; | |
1228 | struct ndmsg ndm; | |
1229 | char buf[256]; | |
1230 | } req; | |
5c610faf | 1231 | |
d62a17ae | 1232 | struct zebra_ns *zns = zebra_ns_lookup(NS_DEFAULT); |
8f7d9fc0 | 1233 | |
d62a17ae | 1234 | memset(&req.n, 0, sizeof(req.n)); |
1235 | memset(&req.ndm, 0, sizeof(req.ndm)); | |
5c610faf | 1236 | |
d62a17ae | 1237 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)); |
1238 | req.n.nlmsg_flags = NLM_F_CREATE | NLM_F_REQUEST; | |
1239 | req.n.nlmsg_type = cmd; // RTM_NEWNEIGH or RTM_DELNEIGH | |
1240 | req.n.nlmsg_pid = zns->netlink_cmd.snl.nl_pid; | |
a55ba23f | 1241 | |
d62a17ae | 1242 | req.ndm.ndm_family = AF_INET; |
1243 | req.ndm.ndm_state = NUD_PERMANENT; | |
1244 | req.ndm.ndm_ifindex = ifindex; | |
1245 | req.ndm.ndm_type = RTN_UNICAST; | |
5c610faf | 1246 | |
d62a17ae | 1247 | addattr_l(&req.n, sizeof(req), NDA_DST, &addr, 4); |
1248 | addattr_l(&req.n, sizeof(req), NDA_LLADDR, lla, llalen); | |
5c610faf | 1249 | |
d62a17ae | 1250 | return netlink_talk(netlink_talk_filter, &req.n, &zns->netlink_cmd, zns, |
1251 | 0); | |
5c610faf DS |
1252 | } |
1253 | ||
718e3744 | 1254 | /* Routing table change via netlink interface. */ |
6ae24471 | 1255 | /* Update flag indicates whether this is a "replace" or not. */ |
d62a17ae | 1256 | static int netlink_route_multipath(int cmd, struct prefix *p, |
1257 | struct prefix *src_p, struct route_entry *re, | |
1258 | int update) | |
718e3744 | 1259 | { |
d62a17ae | 1260 | int bytelen; |
1261 | struct sockaddr_nl snl; | |
1262 | struct nexthop *nexthop = NULL; | |
1263 | unsigned int nexthop_num; | |
a8309422 | 1264 | int discard = 0; |
d62a17ae | 1265 | int family = PREFIX_FAMILY(p); |
1266 | const char *routedesc; | |
1267 | int setsrc = 0; | |
1268 | union g_addr src; | |
1269 | ||
1270 | struct { | |
1271 | struct nlmsghdr n; | |
1272 | struct rtmsg r; | |
1273 | char buf[NL_PKT_BUF_SIZE]; | |
1274 | } req; | |
1275 | ||
1276 | struct zebra_ns *zns = zebra_ns_lookup(NS_DEFAULT); | |
1277 | struct zebra_vrf *zvrf = vrf_info_lookup(re->vrf_id); | |
1278 | ||
1279 | memset(&req, 0, sizeof req - NL_PKT_BUF_SIZE); | |
1280 | ||
1281 | bytelen = (family == AF_INET ? 4 : 16); | |
1282 | ||
1283 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)); | |
1284 | req.n.nlmsg_flags = NLM_F_CREATE | NLM_F_REQUEST; | |
1285 | if ((cmd == RTM_NEWROUTE) && update) | |
1286 | req.n.nlmsg_flags |= NLM_F_REPLACE; | |
1287 | req.n.nlmsg_type = cmd; | |
1288 | req.n.nlmsg_pid = zns->netlink_cmd.snl.nl_pid; | |
1289 | ||
1290 | req.r.rtm_family = family; | |
1291 | req.r.rtm_dst_len = p->prefixlen; | |
1292 | req.r.rtm_src_len = src_p ? src_p->prefixlen : 0; | |
915902cb | 1293 | req.r.rtm_protocol = zebra2proto(re->type); |
d62a17ae | 1294 | req.r.rtm_scope = RT_SCOPE_UNIVERSE; |
a8309422 | 1295 | req.r.rtm_type = RTN_UNICAST; |
d62a17ae | 1296 | |
d62a17ae | 1297 | addattr_l(&req.n, sizeof req, RTA_DST, &p->u.prefix, bytelen); |
1298 | if (src_p) | |
1299 | addattr_l(&req.n, sizeof req, RTA_SRC, &src_p->u.prefix, | |
1300 | bytelen); | |
1301 | ||
1302 | /* Metric. */ | |
1303 | /* Hardcode the metric for all routes coming from zebra. Metric isn't | |
1304 | * used | |
1305 | * either by the kernel or by zebra. Its purely for calculating best | |
1306 | * path(s) | |
1307 | * by the routing protocol and for communicating with protocol peers. | |
1308 | */ | |
1309 | addattr32(&req.n, sizeof req, RTA_PRIORITY, NL_DEFAULT_ROUTE_METRIC); | |
1310 | ||
1311 | /* Table corresponding to this route. */ | |
1312 | if (re->table < 256) | |
1313 | req.r.rtm_table = re->table; | |
1314 | else { | |
1315 | req.r.rtm_table = RT_TABLE_UNSPEC; | |
1316 | addattr32(&req.n, sizeof req, RTA_TABLE, re->table); | |
0aabccc0 | 1317 | } |
718e3744 | 1318 | |
a8309422 DL |
1319 | if (discard) |
1320 | goto skip; | |
1321 | ||
d62a17ae | 1322 | if (re->mtu || re->nexthop_mtu) { |
1323 | char buf[NL_PKT_BUF_SIZE]; | |
1324 | struct rtattr *rta = (void *)buf; | |
1325 | u_int32_t mtu = re->mtu; | |
1326 | if (!mtu || (re->nexthop_mtu && re->nexthop_mtu < mtu)) | |
1327 | mtu = re->nexthop_mtu; | |
1328 | rta->rta_type = RTA_METRICS; | |
1329 | rta->rta_len = RTA_LENGTH(0); | |
1330 | rta_addattr_l(rta, NL_PKT_BUF_SIZE, RTAX_MTU, &mtu, sizeof mtu); | |
1331 | addattr_l(&req.n, NL_PKT_BUF_SIZE, RTA_METRICS, RTA_DATA(rta), | |
1332 | RTA_PAYLOAD(rta)); | |
1333 | } | |
1334 | ||
d62a17ae | 1335 | /* Count overall nexthops so we can decide whether to use singlepath |
1336 | * or multipath case. */ | |
1337 | nexthop_num = 0; | |
1338 | for (ALL_NEXTHOPS(re->nexthop, nexthop)) { | |
1339 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_RECURSIVE)) | |
1340 | continue; | |
1341 | if (cmd == RTM_NEWROUTE | |
25b9cb0c | 1342 | && !NEXTHOP_IS_ACTIVE(nexthop->flags)) |
d62a17ae | 1343 | continue; |
1344 | if (cmd == RTM_DELROUTE | |
1345 | && !CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB)) | |
1346 | continue; | |
1347 | ||
1348 | nexthop_num++; | |
1349 | } | |
1350 | ||
1351 | /* Singlepath case. */ | |
1352 | if (nexthop_num == 1 || multipath_num == 1) { | |
1353 | nexthop_num = 0; | |
1354 | for (ALL_NEXTHOPS(re->nexthop, nexthop)) { | |
1f1d24a8 DS |
1355 | /* |
1356 | * So we want to cover 2 types of blackhole | |
1357 | * routes here: | |
1358 | * 1) A normal blackhole route( ala from a static | |
1359 | * install. | |
1360 | * 2) A recursively resolved blackhole route | |
1361 | */ | |
1362 | if (nexthop->type == NEXTHOP_TYPE_BLACKHOLE) { | |
1363 | switch (nexthop->bh_type) { | |
1364 | case BLACKHOLE_ADMINPROHIB: | |
1365 | req.r.rtm_type = RTN_PROHIBIT; | |
1366 | break; | |
1367 | case BLACKHOLE_REJECT: | |
1368 | req.r.rtm_type = RTN_UNREACHABLE; | |
1369 | break; | |
1370 | default: | |
1371 | req.r.rtm_type = RTN_BLACKHOLE; | |
1372 | break; | |
1373 | } | |
1374 | goto skip; | |
1375 | } | |
d62a17ae | 1376 | if (CHECK_FLAG(nexthop->flags, |
1377 | NEXTHOP_FLAG_RECURSIVE)) { | |
1378 | if (!setsrc) { | |
1379 | if (family == AF_INET) { | |
1380 | if (nexthop->rmap_src.ipv4 | |
1381 | .s_addr | |
1382 | != 0) { | |
1383 | src.ipv4 = | |
1384 | nexthop->rmap_src | |
1385 | .ipv4; | |
1386 | setsrc = 1; | |
1387 | } else if (nexthop->src.ipv4 | |
1388 | .s_addr | |
1389 | != 0) { | |
1390 | src.ipv4 = | |
1391 | nexthop->src | |
1392 | .ipv4; | |
1393 | setsrc = 1; | |
1394 | } | |
1395 | } else if (family == AF_INET6) { | |
1396 | if (!IN6_IS_ADDR_UNSPECIFIED( | |
1397 | &nexthop->rmap_src | |
1398 | .ipv6)) { | |
1399 | src.ipv6 = | |
1400 | nexthop->rmap_src | |
1401 | .ipv6; | |
1402 | setsrc = 1; | |
1403 | } else if ( | |
1404 | !IN6_IS_ADDR_UNSPECIFIED( | |
1405 | &nexthop->src | |
1406 | .ipv6)) { | |
1407 | src.ipv6 = | |
1408 | nexthop->src | |
1409 | .ipv6; | |
1410 | setsrc = 1; | |
1411 | } | |
1412 | } | |
1413 | } | |
1414 | continue; | |
1415 | } | |
1416 | ||
1417 | if ((cmd == RTM_NEWROUTE | |
25b9cb0c | 1418 | && NEXTHOP_IS_ACTIVE(nexthop->flags)) |
d62a17ae | 1419 | || (cmd == RTM_DELROUTE |
1420 | && CHECK_FLAG(nexthop->flags, | |
1421 | NEXTHOP_FLAG_FIB))) { | |
1422 | routedesc = nexthop->rparent | |
8b1450b9 RW |
1423 | ? "recursive, single-path" |
1424 | : "single-path"; | |
d62a17ae | 1425 | |
1426 | _netlink_route_debug(cmd, p, nexthop, routedesc, | |
1427 | family, zvrf); | |
1428 | _netlink_route_build_singlepath( | |
1429 | routedesc, bytelen, nexthop, &req.n, | |
1430 | &req.r, sizeof req, cmd); | |
1431 | nexthop_num++; | |
1432 | break; | |
1433 | } | |
1434 | } | |
1435 | if (setsrc && (cmd == RTM_NEWROUTE)) { | |
1436 | if (family == AF_INET) | |
1437 | addattr_l(&req.n, sizeof req, RTA_PREFSRC, | |
1438 | &src.ipv4, bytelen); | |
1439 | else if (family == AF_INET6) | |
1440 | addattr_l(&req.n, sizeof req, RTA_PREFSRC, | |
1441 | &src.ipv6, bytelen); | |
1442 | } | |
1443 | } else { | |
1444 | char buf[NL_PKT_BUF_SIZE]; | |
1445 | struct rtattr *rta = (void *)buf; | |
1446 | struct rtnexthop *rtnh; | |
1447 | union g_addr *src1 = NULL; | |
1448 | ||
1449 | rta->rta_type = RTA_MULTIPATH; | |
1450 | rta->rta_len = RTA_LENGTH(0); | |
1451 | rtnh = RTA_DATA(rta); | |
1452 | ||
1453 | nexthop_num = 0; | |
1454 | for (ALL_NEXTHOPS(re->nexthop, nexthop)) { | |
1455 | if (nexthop_num >= multipath_num) | |
1456 | break; | |
1457 | ||
1458 | if (CHECK_FLAG(nexthop->flags, | |
1459 | NEXTHOP_FLAG_RECURSIVE)) { | |
1460 | /* This only works for IPv4 now */ | |
1461 | if (!setsrc) { | |
1462 | if (family == AF_INET) { | |
1463 | if (nexthop->rmap_src.ipv4 | |
1464 | .s_addr | |
1465 | != 0) { | |
1466 | src.ipv4 = | |
1467 | nexthop->rmap_src | |
1468 | .ipv4; | |
1469 | setsrc = 1; | |
1470 | } else if (nexthop->src.ipv4 | |
1471 | .s_addr | |
1472 | != 0) { | |
1473 | src.ipv4 = | |
1474 | nexthop->src | |
1475 | .ipv4; | |
1476 | setsrc = 1; | |
1477 | } | |
1478 | } else if (family == AF_INET6) { | |
1479 | if (!IN6_IS_ADDR_UNSPECIFIED( | |
1480 | &nexthop->rmap_src | |
1481 | .ipv6)) { | |
1482 | src.ipv6 = | |
1483 | nexthop->rmap_src | |
1484 | .ipv6; | |
1485 | setsrc = 1; | |
1486 | } else if ( | |
1487 | !IN6_IS_ADDR_UNSPECIFIED( | |
1488 | &nexthop->src | |
1489 | .ipv6)) { | |
1490 | src.ipv6 = | |
1491 | nexthop->src | |
1492 | .ipv6; | |
1493 | setsrc = 1; | |
1494 | } | |
1495 | } | |
1496 | } | |
1497 | continue; | |
1498 | } | |
1499 | ||
1500 | if ((cmd == RTM_NEWROUTE | |
25b9cb0c | 1501 | && NEXTHOP_IS_ACTIVE(nexthop->flags)) |
d62a17ae | 1502 | || (cmd == RTM_DELROUTE |
1503 | && CHECK_FLAG(nexthop->flags, | |
1504 | NEXTHOP_FLAG_FIB))) { | |
1505 | routedesc = nexthop->rparent | |
8b1450b9 RW |
1506 | ? "recursive, multipath" |
1507 | : "multipath"; | |
d62a17ae | 1508 | nexthop_num++; |
1509 | ||
1510 | _netlink_route_debug(cmd, p, nexthop, routedesc, | |
1511 | family, zvrf); | |
1512 | _netlink_route_build_multipath( | |
1513 | routedesc, bytelen, nexthop, rta, rtnh, | |
1514 | &req.r, &src1); | |
1515 | rtnh = RTNH_NEXT(rtnh); | |
1516 | ||
1517 | if (!setsrc && src1) { | |
1518 | if (family == AF_INET) | |
1519 | src.ipv4 = src1->ipv4; | |
1520 | else if (family == AF_INET6) | |
1521 | src.ipv6 = src1->ipv6; | |
1522 | ||
1523 | setsrc = 1; | |
1524 | } | |
1525 | } | |
1526 | } | |
1527 | if (setsrc && (cmd == RTM_NEWROUTE)) { | |
1528 | if (family == AF_INET) | |
1529 | addattr_l(&req.n, sizeof req, RTA_PREFSRC, | |
1530 | &src.ipv4, bytelen); | |
1531 | else if (family == AF_INET6) | |
1532 | addattr_l(&req.n, sizeof req, RTA_PREFSRC, | |
1533 | &src.ipv6, bytelen); | |
1534 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1535 | zlog_debug("Setting source"); | |
1536 | } | |
1537 | ||
1538 | if (rta->rta_len > RTA_LENGTH(0)) | |
1539 | addattr_l(&req.n, NL_PKT_BUF_SIZE, RTA_MULTIPATH, | |
1540 | RTA_DATA(rta), RTA_PAYLOAD(rta)); | |
1541 | } | |
718e3744 | 1542 | |
d62a17ae | 1543 | /* If there is no useful nexthop then return. */ |
1544 | if (nexthop_num == 0) { | |
1545 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1546 | zlog_debug( | |
1547 | "netlink_route_multipath(): No useful nexthop."); | |
1548 | return 0; | |
1549 | } | |
718e3744 | 1550 | |
7021c425 | 1551 | skip: |
718e3744 | 1552 | |
d62a17ae | 1553 | /* Destination netlink address. */ |
1554 | memset(&snl, 0, sizeof snl); | |
1555 | snl.nl_family = AF_NETLINK; | |
718e3744 | 1556 | |
d62a17ae | 1557 | /* Talk to netlink socket. */ |
1558 | return netlink_talk(netlink_talk_filter, &req.n, &zns->netlink_cmd, zns, | |
1559 | 0); | |
718e3744 | 1560 | } |
1561 | ||
43b5cc5e | 1562 | int kernel_get_ipmr_sg_stats(struct zebra_vrf *zvrf, void *in) |
e3be0432 | 1563 | { |
d62a17ae | 1564 | int suc = 0; |
1565 | struct mcast_route_data *mr = (struct mcast_route_data *)in; | |
bd8b9272 DS |
1566 | struct { |
1567 | struct nlmsghdr n; | |
1568 | struct ndmsg ndm; | |
1569 | char buf[256]; | |
1570 | } req; | |
e3be0432 | 1571 | |
d62a17ae | 1572 | mroute = mr; |
bd8b9272 DS |
1573 | struct zebra_ns *zns = zebra_ns_lookup(NS_DEFAULT); |
1574 | ||
1575 | memset(&req.n, 0, sizeof(req.n)); | |
1576 | memset(&req.ndm, 0, sizeof(req.ndm)); | |
1577 | ||
1578 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)); | |
1579 | req.n.nlmsg_flags = NLM_F_REQUEST; | |
1580 | req.n.nlmsg_pid = zns->netlink_cmd.snl.nl_pid; | |
1581 | ||
1582 | req.ndm.ndm_family = RTNL_FAMILY_IPMR; | |
1583 | req.n.nlmsg_type = RTM_GETROUTE; | |
1584 | ||
1585 | addattr_l(&req.n, sizeof(req), RTA_IIF, &mroute->ifindex, 4); | |
1586 | addattr_l(&req.n, sizeof(req), RTA_OIF, &mroute->ifindex, 4); | |
1587 | addattr_l(&req.n, sizeof(req), RTA_SRC, &mroute->sg.src.s_addr, 4); | |
1588 | addattr_l(&req.n, sizeof(req), RTA_DST, &mroute->sg.grp.s_addr, 4); | |
1589 | addattr_l(&req.n, sizeof(req), RTA_TABLE, &zvrf->table_id, 4); | |
e3be0432 | 1590 | |
bd8b9272 DS |
1591 | suc = netlink_talk(netlink_route_change_read_multicast, &req.n, |
1592 | &zns->netlink_cmd, zns, 0); | |
e3be0432 | 1593 | |
bd8b9272 | 1594 | mroute = NULL; |
d62a17ae | 1595 | return suc; |
e3be0432 DS |
1596 | } |
1597 | ||
d62a17ae | 1598 | int kernel_route_rib(struct prefix *p, struct prefix *src_p, |
1599 | struct route_entry *old, struct route_entry *new) | |
718e3744 | 1600 | { |
0af35d90 RW |
1601 | assert(old || new); |
1602 | ||
d62a17ae | 1603 | if (!old && new) |
1604 | return netlink_route_multipath(RTM_NEWROUTE, p, src_p, new, 0); | |
1605 | if (old && !new) | |
1606 | return netlink_route_multipath(RTM_DELROUTE, p, src_p, old, 0); | |
718e3744 | 1607 | |
d62a17ae | 1608 | return netlink_route_multipath(RTM_NEWROUTE, p, src_p, new, 1); |
718e3744 | 1609 | } |
1610 | ||
d62a17ae | 1611 | int kernel_neigh_update(int add, int ifindex, uint32_t addr, char *lla, |
1612 | int llalen) | |
6b8a5694 | 1613 | { |
d62a17ae | 1614 | return netlink_neigh_update(add ? RTM_NEWNEIGH : RTM_DELNEIGH, ifindex, |
1615 | addr, lla, llalen); | |
6b8a5694 | 1616 | } |
718e3744 | 1617 | |
13d60d35 | 1618 | /* |
1619 | * Add remote VTEP to the flood list for this VxLAN interface (VNI). This | |
1620 | * is done by adding an FDB entry with a MAC of 00:00:00:00:00:00. | |
1621 | */ | |
d62a17ae | 1622 | static int netlink_vxlan_flood_list_update(struct interface *ifp, |
1623 | struct in_addr *vtep_ip, int cmd) | |
13d60d35 | 1624 | { |
d62a17ae | 1625 | struct zebra_ns *zns = zebra_ns_lookup(NS_DEFAULT); |
1626 | struct { | |
1627 | struct nlmsghdr n; | |
1628 | struct ndmsg ndm; | |
1629 | char buf[256]; | |
1630 | } req; | |
1631 | u_char dst_mac[6] = {0x0, 0x0, 0x0, 0x0, 0x0, 0x0}; | |
1632 | ||
1633 | memset(&req.n, 0, sizeof(req.n)); | |
1634 | memset(&req.ndm, 0, sizeof(req.ndm)); | |
1635 | ||
1636 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)); | |
1637 | req.n.nlmsg_flags = NLM_F_REQUEST; | |
1638 | if (cmd == RTM_NEWNEIGH) | |
1639 | req.n.nlmsg_flags |= (NLM_F_CREATE | NLM_F_APPEND); | |
1640 | req.n.nlmsg_type = cmd; | |
1641 | req.ndm.ndm_family = PF_BRIDGE; | |
1642 | req.ndm.ndm_state = NUD_NOARP | NUD_PERMANENT; | |
1643 | req.ndm.ndm_flags |= NTF_SELF; // Handle by "self", not "master" | |
1644 | ||
1645 | ||
1646 | addattr_l(&req.n, sizeof(req), NDA_LLADDR, &dst_mac, 6); | |
1647 | req.ndm.ndm_ifindex = ifp->ifindex; | |
1648 | addattr_l(&req.n, sizeof(req), NDA_DST, &vtep_ip->s_addr, 4); | |
1649 | ||
1650 | return netlink_talk(netlink_talk_filter, &req.n, &zns->netlink_cmd, zns, | |
1651 | 0); | |
13d60d35 | 1652 | } |
1653 | ||
1654 | /* | |
d62a17ae | 1655 | * Add remote VTEP for this VxLAN interface (VNI). In Linux, this involves |
1656 | * adding | |
13d60d35 | 1657 | * a "flood" MAC FDB entry. |
1658 | */ | |
d62a17ae | 1659 | int kernel_add_vtep(vni_t vni, struct interface *ifp, struct in_addr *vtep_ip) |
13d60d35 | 1660 | { |
d62a17ae | 1661 | if (IS_ZEBRA_DEBUG_VXLAN) |
1662 | zlog_debug("Install %s into flood list for VNI %u intf %s(%u)", | |
1663 | inet_ntoa(*vtep_ip), vni, ifp->name, ifp->ifindex); | |
13d60d35 | 1664 | |
d62a17ae | 1665 | return netlink_vxlan_flood_list_update(ifp, vtep_ip, RTM_NEWNEIGH); |
13d60d35 | 1666 | } |
1667 | ||
1668 | /* | |
1669 | * Remove remote VTEP for this VxLAN interface (VNI). In Linux, this involves | |
1670 | * deleting the "flood" MAC FDB entry. | |
1671 | */ | |
d62a17ae | 1672 | int kernel_del_vtep(vni_t vni, struct interface *ifp, struct in_addr *vtep_ip) |
13d60d35 | 1673 | { |
d62a17ae | 1674 | if (IS_ZEBRA_DEBUG_VXLAN) |
1675 | zlog_debug( | |
1676 | "Uninstall %s from flood list for VNI %u intf %s(%u)", | |
1677 | inet_ntoa(*vtep_ip), vni, ifp->name, ifp->ifindex); | |
13d60d35 | 1678 | |
d62a17ae | 1679 | return netlink_vxlan_flood_list_update(ifp, vtep_ip, RTM_DELNEIGH); |
13d60d35 | 1680 | } |
1681 | ||
2232a77c | 1682 | #ifndef NDA_RTA |
d62a17ae | 1683 | #define NDA_RTA(r) \ |
1684 | ((struct rtattr *)(((char *)(r)) + NLMSG_ALIGN(sizeof(struct ndmsg)))) | |
2232a77c | 1685 | #endif |
1686 | ||
d62a17ae | 1687 | static int netlink_macfdb_change(struct sockaddr_nl *snl, struct nlmsghdr *h, |
1688 | int len) | |
2232a77c | 1689 | { |
d62a17ae | 1690 | struct ndmsg *ndm; |
1691 | struct interface *ifp; | |
1692 | struct zebra_if *zif; | |
d62a17ae | 1693 | struct rtattr *tb[NDA_MAX + 1]; |
1694 | struct interface *br_if; | |
1695 | struct ethaddr mac; | |
1696 | vlanid_t vid = 0; | |
1697 | struct prefix vtep_ip; | |
1698 | int vid_present = 0, dst_present = 0; | |
1699 | char buf[ETHER_ADDR_STRLEN]; | |
1700 | char vid_buf[20]; | |
1701 | char dst_buf[30]; | |
1702 | u_char sticky = 0; | |
1703 | ||
1704 | ndm = NLMSG_DATA(h); | |
1705 | ||
2853fed6 | 1706 | /* We only process macfdb notifications if EVPN is enabled */ |
1707 | if (!is_evpn_enabled()) | |
1708 | return 0; | |
1709 | ||
d62a17ae | 1710 | /* The interface should exist. */ |
1711 | ifp = if_lookup_by_index_per_ns(zebra_ns_lookup(NS_DEFAULT), | |
1712 | ndm->ndm_ifindex); | |
2853fed6 | 1713 | if (!ifp || !ifp->info) |
d62a17ae | 1714 | return 0; |
1715 | ||
1716 | /* The interface should be something we're interested in. */ | |
1717 | if (!IS_ZEBRA_IF_BRIDGE_SLAVE(ifp)) | |
1718 | return 0; | |
1719 | ||
1720 | /* Drop "permanent" entries. */ | |
1721 | if (ndm->ndm_state & NUD_PERMANENT) | |
1722 | return 0; | |
1723 | ||
1724 | zif = (struct zebra_if *)ifp->info; | |
1725 | if ((br_if = zif->brslave_info.br_if) == NULL) { | |
1726 | zlog_warn("%s family %s IF %s(%u) brIF %u - no bridge master", | |
1727 | nl_msg_type_to_str(h->nlmsg_type), | |
1728 | nl_family_to_str(ndm->ndm_family), ifp->name, | |
1729 | ndm->ndm_ifindex, zif->brslave_info.bridge_ifindex); | |
1730 | return 0; | |
1731 | } | |
1732 | ||
1733 | /* Parse attributes and extract fields of interest. */ | |
1734 | memset(tb, 0, sizeof tb); | |
1735 | netlink_parse_rtattr(tb, NDA_MAX, NDA_RTA(ndm), len); | |
1736 | ||
1737 | if (!tb[NDA_LLADDR]) { | |
1738 | zlog_warn("%s family %s IF %s(%u) brIF %u - no LLADDR", | |
1739 | nl_msg_type_to_str(h->nlmsg_type), | |
1740 | nl_family_to_str(ndm->ndm_family), ifp->name, | |
1741 | ndm->ndm_ifindex, zif->brslave_info.bridge_ifindex); | |
1742 | return 0; | |
1743 | } | |
1744 | ||
ff8b7eb8 | 1745 | if (RTA_PAYLOAD(tb[NDA_LLADDR]) != ETH_ALEN) { |
d62a17ae | 1746 | zlog_warn( |
df0b13cf | 1747 | "%s family %s IF %s(%u) brIF %u - LLADDR is not MAC, len %lu", |
d62a17ae | 1748 | nl_msg_type_to_str(h->nlmsg_type), |
1749 | nl_family_to_str(ndm->ndm_family), ifp->name, | |
1750 | ndm->ndm_ifindex, zif->brslave_info.bridge_ifindex, | |
df0b13cf | 1751 | (unsigned long)RTA_PAYLOAD(tb[NDA_LLADDR])); |
d62a17ae | 1752 | return 0; |
1753 | } | |
1754 | ||
ff8b7eb8 | 1755 | memcpy(&mac, RTA_DATA(tb[NDA_LLADDR]), ETH_ALEN); |
d62a17ae | 1756 | |
1757 | if ((NDA_VLAN <= NDA_MAX) && tb[NDA_VLAN]) { | |
1758 | vid_present = 1; | |
1759 | vid = *(u_int16_t *)RTA_DATA(tb[NDA_VLAN]); | |
1760 | sprintf(vid_buf, " VLAN %u", vid); | |
1761 | } | |
1762 | ||
1763 | if (tb[NDA_DST]) { | |
1764 | /* TODO: Only IPv4 supported now. */ | |
1765 | dst_present = 1; | |
1766 | vtep_ip.family = AF_INET; | |
1767 | vtep_ip.prefixlen = IPV4_MAX_BITLEN; | |
1768 | memcpy(&(vtep_ip.u.prefix4.s_addr), RTA_DATA(tb[NDA_DST]), | |
1769 | IPV4_MAX_BYTELEN); | |
1770 | sprintf(dst_buf, " dst %s", inet_ntoa(vtep_ip.u.prefix4)); | |
1771 | } | |
1772 | ||
1773 | sticky = (ndm->ndm_state & NUD_NOARP) ? 1 : 0; | |
1774 | ||
1775 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1776 | zlog_debug("Rx %s family %s IF %s(%u)%s %sMAC %s%s", | |
1777 | nl_msg_type_to_str(h->nlmsg_type), | |
1778 | nl_family_to_str(ndm->ndm_family), ifp->name, | |
1779 | ndm->ndm_ifindex, vid_present ? vid_buf : "", | |
1780 | sticky ? "sticky " : "", | |
1781 | prefix_mac2str(&mac, buf, sizeof(buf)), | |
1782 | dst_present ? dst_buf : ""); | |
1783 | ||
1784 | if (filter_vlan && vid != filter_vlan) | |
1785 | return 0; | |
1786 | ||
1787 | /* If add or update, do accordingly if learnt on a "local" interface; if | |
1788 | * the notification is over VxLAN, this has to be related to | |
1789 | * multi-homing, | |
1790 | * so perform an implicit delete of any local entry (if it exists). | |
1791 | */ | |
1792 | if (h->nlmsg_type == RTM_NEWNEIGH) { | |
1793 | /* Drop "permanent" entries. */ | |
1794 | if (ndm->ndm_state & NUD_PERMANENT) | |
1795 | return 0; | |
1796 | ||
1797 | if (IS_ZEBRA_IF_VXLAN(ifp)) | |
1798 | return zebra_vxlan_check_del_local_mac(ifp, br_if, &mac, | |
1799 | vid); | |
1800 | ||
1801 | return zebra_vxlan_local_mac_add_update(ifp, br_if, &mac, vid, | |
1802 | sticky); | |
1803 | } | |
1804 | ||
1805 | /* This is a delete notification. | |
1806 | * 1. For a MAC over VxLan, check if it needs to be refreshed(readded) | |
1807 | * 2. For a MAC over "local" interface, delete the mac | |
1808 | * Note: We will get notifications from both bridge driver and VxLAN | |
1809 | * driver. | |
1810 | * Ignore the notification from VxLan driver as it is also generated | |
1811 | * when mac moves from remote to local. | |
1812 | */ | |
1813 | if (dst_present) | |
1814 | return 0; | |
1815 | ||
1816 | if (IS_ZEBRA_IF_VXLAN(ifp)) | |
1817 | return zebra_vxlan_check_readd_remote_mac(ifp, br_if, &mac, | |
1818 | vid); | |
1819 | ||
1820 | return zebra_vxlan_local_mac_del(ifp, br_if, &mac, vid); | |
2232a77c | 1821 | } |
1822 | ||
d62a17ae | 1823 | static int netlink_macfdb_table(struct sockaddr_nl *snl, struct nlmsghdr *h, |
1824 | ns_id_t ns_id, int startup) | |
2232a77c | 1825 | { |
d62a17ae | 1826 | int len; |
1827 | struct ndmsg *ndm; | |
2232a77c | 1828 | |
d62a17ae | 1829 | if (h->nlmsg_type != RTM_NEWNEIGH) |
1830 | return 0; | |
2232a77c | 1831 | |
d62a17ae | 1832 | /* Length validity. */ |
1833 | len = h->nlmsg_len - NLMSG_LENGTH(sizeof(struct ndmsg)); | |
1834 | if (len < 0) | |
1835 | return -1; | |
2232a77c | 1836 | |
d62a17ae | 1837 | /* We are interested only in AF_BRIDGE notifications. */ |
1838 | ndm = NLMSG_DATA(h); | |
1839 | if (ndm->ndm_family != AF_BRIDGE) | |
1840 | return 0; | |
2232a77c | 1841 | |
d62a17ae | 1842 | return netlink_macfdb_change(snl, h, len); |
2232a77c | 1843 | } |
1844 | ||
1845 | /* Request for MAC FDB information from the kernel */ | |
d62a17ae | 1846 | static int netlink_request_macs(struct zebra_ns *zns, int family, int type, |
1847 | ifindex_t master_ifindex) | |
2232a77c | 1848 | { |
d62a17ae | 1849 | struct { |
1850 | struct nlmsghdr n; | |
1851 | struct ifinfomsg ifm; | |
1852 | char buf[256]; | |
1853 | } req; | |
1854 | ||
1855 | /* Form the request, specifying filter (rtattr) if needed. */ | |
1856 | memset(&req, 0, sizeof(req)); | |
1857 | req.n.nlmsg_type = type; | |
1858 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg)); | |
1859 | req.ifm.ifi_family = family; | |
1860 | if (master_ifindex) | |
1861 | addattr32(&req.n, sizeof(req), IFLA_MASTER, master_ifindex); | |
1862 | ||
1863 | return netlink_request(&zns->netlink_cmd, &req.n); | |
2232a77c | 1864 | } |
1865 | ||
1866 | /* | |
1867 | * MAC forwarding database read using netlink interface. This is invoked | |
1868 | * at startup. | |
1869 | */ | |
d62a17ae | 1870 | int netlink_macfdb_read(struct zebra_ns *zns) |
2232a77c | 1871 | { |
d62a17ae | 1872 | int ret; |
1873 | ||
1874 | /* Get bridge FDB table. */ | |
1875 | ret = netlink_request_macs(zns, AF_BRIDGE, RTM_GETNEIGH, 0); | |
1876 | if (ret < 0) | |
1877 | return ret; | |
1878 | /* We are reading entire table. */ | |
1879 | filter_vlan = 0; | |
1880 | ret = netlink_parse_info(netlink_macfdb_table, &zns->netlink_cmd, zns, | |
1881 | 0, 1); | |
1882 | ||
1883 | return ret; | |
2232a77c | 1884 | } |
1885 | ||
1886 | /* | |
1887 | * MAC forwarding database read using netlink interface. This is for a | |
1888 | * specific bridge and matching specific access VLAN (if VLAN-aware bridge). | |
1889 | */ | |
d62a17ae | 1890 | int netlink_macfdb_read_for_bridge(struct zebra_ns *zns, struct interface *ifp, |
1891 | struct interface *br_if) | |
2232a77c | 1892 | { |
d62a17ae | 1893 | struct zebra_if *br_zif; |
1894 | struct zebra_if *zif; | |
1895 | struct zebra_l2info_vxlan *vxl; | |
1896 | int ret = 0; | |
1897 | ||
1898 | ||
1899 | /* Save VLAN we're filtering on, if needed. */ | |
1900 | br_zif = (struct zebra_if *)br_if->info; | |
1901 | zif = (struct zebra_if *)ifp->info; | |
1902 | vxl = &zif->l2info.vxl; | |
1903 | if (IS_ZEBRA_IF_BRIDGE_VLAN_AWARE(br_zif)) | |
1904 | filter_vlan = vxl->access_vlan; | |
1905 | ||
1906 | /* Get bridge FDB table for specific bridge - we do the VLAN filtering. | |
1907 | */ | |
1908 | ret = netlink_request_macs(zns, AF_BRIDGE, RTM_GETNEIGH, | |
1909 | br_if->ifindex); | |
1910 | if (ret < 0) | |
1911 | return ret; | |
1912 | ret = netlink_parse_info(netlink_macfdb_table, &zns->netlink_cmd, zns, | |
1913 | 0, 0); | |
1914 | ||
1915 | /* Reset VLAN filter. */ | |
1916 | filter_vlan = 0; | |
1917 | return ret; | |
2232a77c | 1918 | } |
1919 | ||
d62a17ae | 1920 | static int netlink_macfdb_update(struct interface *ifp, vlanid_t vid, |
1921 | struct ethaddr *mac, struct in_addr vtep_ip, | |
1922 | int local, int cmd, u_char sticky) | |
2232a77c | 1923 | { |
d62a17ae | 1924 | struct zebra_ns *zns = zebra_ns_lookup(NS_DEFAULT); |
1925 | struct { | |
1926 | struct nlmsghdr n; | |
1927 | struct ndmsg ndm; | |
1928 | char buf[256]; | |
1929 | } req; | |
1930 | int dst_alen; | |
1931 | struct zebra_if *zif; | |
1932 | struct interface *br_if; | |
1933 | struct zebra_if *br_zif; | |
1934 | char buf[ETHER_ADDR_STRLEN]; | |
1935 | int vid_present = 0, dst_present = 0; | |
1936 | char vid_buf[20]; | |
1937 | char dst_buf[30]; | |
1938 | ||
1939 | zif = ifp->info; | |
1940 | if ((br_if = zif->brslave_info.br_if) == NULL) { | |
1941 | zlog_warn("MAC %s on IF %s(%u) - no mapping to bridge", | |
1942 | (cmd == RTM_NEWNEIGH) ? "add" : "del", ifp->name, | |
1943 | ifp->ifindex); | |
1944 | return -1; | |
1945 | } | |
1946 | ||
1947 | memset(&req.n, 0, sizeof(req.n)); | |
1948 | memset(&req.ndm, 0, sizeof(req.ndm)); | |
1949 | ||
1950 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)); | |
1951 | req.n.nlmsg_flags = NLM_F_REQUEST; | |
1952 | if (cmd == RTM_NEWNEIGH) | |
1953 | req.n.nlmsg_flags |= (NLM_F_CREATE | NLM_F_REPLACE); | |
1954 | req.n.nlmsg_type = cmd; | |
1955 | req.ndm.ndm_family = AF_BRIDGE; | |
1956 | req.ndm.ndm_flags |= NTF_SELF | NTF_MASTER; | |
1957 | req.ndm.ndm_state = NUD_REACHABLE; | |
1958 | ||
1959 | if (sticky) | |
1960 | req.ndm.ndm_state |= NUD_NOARP; | |
1961 | else | |
1962 | req.ndm.ndm_flags |= NTF_EXT_LEARNED; | |
1963 | ||
1964 | addattr_l(&req.n, sizeof(req), NDA_LLADDR, mac, 6); | |
1965 | req.ndm.ndm_ifindex = ifp->ifindex; | |
1966 | if (!local) { | |
1967 | dst_alen = 4; // TODO: hardcoded | |
1968 | addattr_l(&req.n, sizeof(req), NDA_DST, &vtep_ip, dst_alen); | |
1969 | dst_present = 1; | |
1970 | sprintf(dst_buf, " dst %s", inet_ntoa(vtep_ip)); | |
1971 | } | |
1972 | br_zif = (struct zebra_if *)br_if->info; | |
1973 | if (IS_ZEBRA_IF_BRIDGE_VLAN_AWARE(br_zif) && vid > 0) { | |
1974 | addattr16(&req.n, sizeof(req), NDA_VLAN, vid); | |
1975 | vid_present = 1; | |
1976 | sprintf(vid_buf, " VLAN %u", vid); | |
1977 | } | |
1978 | addattr32(&req.n, sizeof(req), NDA_MASTER, br_if->ifindex); | |
1979 | ||
1980 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1981 | zlog_debug("Tx %s family %s IF %s(%u)%s %sMAC %s%s", | |
1982 | nl_msg_type_to_str(cmd), | |
1983 | nl_family_to_str(req.ndm.ndm_family), ifp->name, | |
1984 | ifp->ifindex, vid_present ? vid_buf : "", | |
1985 | sticky ? "sticky " : "", | |
1986 | prefix_mac2str(mac, buf, sizeof(buf)), | |
1987 | dst_present ? dst_buf : ""); | |
1988 | ||
1989 | return netlink_talk(netlink_talk_filter, &req.n, &zns->netlink_cmd, zns, | |
1990 | 0); | |
2232a77c | 1991 | } |
1992 | ||
d62a17ae | 1993 | #define NUD_VALID \ |
1994 | (NUD_PERMANENT | NUD_NOARP | NUD_REACHABLE | NUD_PROBE | NUD_STALE \ | |
1995 | | NUD_DELAY) | |
2232a77c | 1996 | |
d62a17ae | 1997 | static int netlink_ipneigh_change(struct sockaddr_nl *snl, struct nlmsghdr *h, |
1998 | int len) | |
2232a77c | 1999 | { |
d62a17ae | 2000 | struct ndmsg *ndm; |
2001 | struct interface *ifp; | |
2002 | struct zebra_if *zif; | |
d62a17ae | 2003 | struct rtattr *tb[NDA_MAX + 1]; |
2004 | struct interface *link_if; | |
2005 | struct ethaddr mac; | |
2006 | struct ipaddr ip; | |
2007 | char buf[ETHER_ADDR_STRLEN]; | |
2008 | char buf2[INET6_ADDRSTRLEN]; | |
2009 | int mac_present = 0; | |
2010 | u_char ext_learned; | |
2011 | ||
2012 | ndm = NLMSG_DATA(h); | |
2013 | ||
2853fed6 | 2014 | /* We only process neigh notifications if EVPN is enabled */ |
2015 | if (!is_evpn_enabled()) | |
2016 | return 0; | |
2017 | ||
d62a17ae | 2018 | /* The interface should exist. */ |
2019 | ifp = if_lookup_by_index_per_ns(zebra_ns_lookup(NS_DEFAULT), | |
2020 | ndm->ndm_ifindex); | |
2853fed6 | 2021 | if (!ifp || !ifp->info) |
d62a17ae | 2022 | return 0; |
2023 | ||
2024 | /* Drop "permanent" entries. */ | |
2025 | if (ndm->ndm_state & NUD_PERMANENT) | |
2026 | return 0; | |
2027 | ||
2028 | zif = (struct zebra_if *)ifp->info; | |
2029 | /* The neighbor is present on an SVI. From this, we locate the | |
2030 | * underlying | |
2031 | * bridge because we're only interested in neighbors on a VxLAN bridge. | |
2032 | * The bridge is located based on the nature of the SVI: | |
2033 | * (a) In the case of a VLAN-aware bridge, the SVI is a L3 VLAN | |
2034 | * interface | |
2035 | * and is linked to the bridge | |
2036 | * (b) In the case of a VLAN-unaware bridge, the SVI is the bridge | |
2037 | * inteface | |
2038 | * itself | |
2039 | */ | |
2040 | if (IS_ZEBRA_IF_VLAN(ifp)) { | |
71349e03 MK |
2041 | link_if = if_lookup_by_index_per_ns(zebra_ns_lookup(NS_DEFAULT), |
2042 | zif->link_ifindex); | |
d62a17ae | 2043 | if (!link_if) |
2044 | return 0; | |
2045 | } else if (IS_ZEBRA_IF_BRIDGE(ifp)) | |
2046 | link_if = ifp; | |
2047 | else | |
2048 | return 0; | |
2049 | ||
2050 | /* Parse attributes and extract fields of interest. */ | |
2051 | memset(tb, 0, sizeof tb); | |
2052 | netlink_parse_rtattr(tb, NDA_MAX, NDA_RTA(ndm), len); | |
2053 | ||
2054 | if (!tb[NDA_DST]) { | |
2055 | zlog_warn("%s family %s IF %s(%u) - no DST", | |
2056 | nl_msg_type_to_str(h->nlmsg_type), | |
2057 | nl_family_to_str(ndm->ndm_family), ifp->name, | |
2058 | ndm->ndm_ifindex); | |
2059 | return 0; | |
2060 | } | |
2061 | memset(&mac, 0, sizeof(struct ethaddr)); | |
2062 | memset(&ip, 0, sizeof(struct ipaddr)); | |
2063 | ip.ipa_type = (ndm->ndm_family == AF_INET) ? IPADDR_V4 : IPADDR_V6; | |
2064 | memcpy(&ip.ip.addr, RTA_DATA(tb[NDA_DST]), RTA_PAYLOAD(tb[NDA_DST])); | |
2065 | ||
2066 | if (h->nlmsg_type == RTM_NEWNEIGH) { | |
2067 | if (tb[NDA_LLADDR]) { | |
ff8b7eb8 | 2068 | if (RTA_PAYLOAD(tb[NDA_LLADDR]) != ETH_ALEN) { |
d62a17ae | 2069 | zlog_warn( |
df0b13cf | 2070 | "%s family %s IF %s(%u) - LLADDR is not MAC, len %lu", |
d62a17ae | 2071 | nl_msg_type_to_str(h->nlmsg_type), |
2072 | nl_family_to_str(ndm->ndm_family), | |
2073 | ifp->name, ndm->ndm_ifindex, | |
df0b13cf | 2074 | (unsigned long)RTA_PAYLOAD(tb[NDA_LLADDR])); |
d62a17ae | 2075 | return 0; |
2076 | } | |
2077 | ||
2078 | mac_present = 1; | |
ff8b7eb8 | 2079 | memcpy(&mac, RTA_DATA(tb[NDA_LLADDR]), ETH_ALEN); |
d62a17ae | 2080 | } |
2081 | ||
2082 | ext_learned = (ndm->ndm_flags & NTF_EXT_LEARNED) ? 1 : 0; | |
2083 | ||
2084 | if (IS_ZEBRA_DEBUG_KERNEL) | |
2085 | zlog_debug( | |
2086 | "Rx %s family %s IF %s(%u) IP %s MAC %s state 0x%x flags 0x%x", | |
2087 | nl_msg_type_to_str(h->nlmsg_type), | |
2088 | nl_family_to_str(ndm->ndm_family), ifp->name, | |
2089 | ndm->ndm_ifindex, | |
2090 | ipaddr2str(&ip, buf2, sizeof(buf2)), | |
2091 | mac_present | |
2092 | ? prefix_mac2str(&mac, buf, sizeof(buf)) | |
2093 | : "", | |
2094 | ndm->ndm_state, ndm->ndm_flags); | |
2095 | ||
2096 | /* If the neighbor state is valid for use, process as an add or | |
2097 | * update | |
2098 | * else process as a delete. Note that the delete handling may | |
2099 | * result | |
2100 | * in re-adding the neighbor if it is a valid "remote" neighbor. | |
2101 | */ | |
2102 | if (ndm->ndm_state & NUD_VALID) | |
2103 | return zebra_vxlan_local_neigh_add_update( | |
2104 | ifp, link_if, &ip, &mac, ndm->ndm_state, | |
2105 | ext_learned); | |
2106 | ||
2107 | return zebra_vxlan_local_neigh_del(ifp, link_if, &ip); | |
2108 | } | |
2109 | ||
2110 | if (IS_ZEBRA_DEBUG_KERNEL) | |
2111 | zlog_debug("Rx %s family %s IF %s(%u) IP %s", | |
2112 | nl_msg_type_to_str(h->nlmsg_type), | |
2113 | nl_family_to_str(ndm->ndm_family), ifp->name, | |
2114 | ndm->ndm_ifindex, | |
2115 | ipaddr2str(&ip, buf2, sizeof(buf2))); | |
2116 | ||
2117 | /* Process the delete - it may result in re-adding the neighbor if it is | |
2118 | * a valid "remote" neighbor. | |
2119 | */ | |
2120 | return zebra_vxlan_local_neigh_del(ifp, link_if, &ip); | |
2232a77c | 2121 | } |
2122 | ||
d62a17ae | 2123 | static int netlink_neigh_table(struct sockaddr_nl *snl, struct nlmsghdr *h, |
2124 | ns_id_t ns_id, int startup) | |
2232a77c | 2125 | { |
d62a17ae | 2126 | int len; |
2127 | struct ndmsg *ndm; | |
2232a77c | 2128 | |
d62a17ae | 2129 | if (h->nlmsg_type != RTM_NEWNEIGH) |
2130 | return 0; | |
2232a77c | 2131 | |
d62a17ae | 2132 | /* Length validity. */ |
2133 | len = h->nlmsg_len - NLMSG_LENGTH(sizeof(struct ndmsg)); | |
2134 | if (len < 0) | |
2135 | return -1; | |
2232a77c | 2136 | |
d62a17ae | 2137 | /* We are interested only in AF_INET or AF_INET6 notifications. */ |
2138 | ndm = NLMSG_DATA(h); | |
2139 | if (ndm->ndm_family != AF_INET && ndm->ndm_family != AF_INET6) | |
2140 | return 0; | |
2232a77c | 2141 | |
d62a17ae | 2142 | return netlink_neigh_change(snl, h, len); |
2232a77c | 2143 | } |
2144 | ||
2145 | /* Request for IP neighbor information from the kernel */ | |
d62a17ae | 2146 | static int netlink_request_neigh(struct zebra_ns *zns, int family, int type, |
2147 | ifindex_t ifindex) | |
2232a77c | 2148 | { |
d62a17ae | 2149 | struct { |
2150 | struct nlmsghdr n; | |
2151 | struct ndmsg ndm; | |
2152 | char buf[256]; | |
2153 | } req; | |
2154 | ||
2155 | /* Form the request, specifying filter (rtattr) if needed. */ | |
2156 | memset(&req, 0, sizeof(req)); | |
2157 | req.n.nlmsg_type = type; | |
2158 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)); | |
2159 | req.ndm.ndm_family = family; | |
2160 | if (ifindex) | |
2161 | addattr32(&req.n, sizeof(req), NDA_IFINDEX, ifindex); | |
2162 | ||
2163 | return netlink_request(&zns->netlink_cmd, &req.n); | |
2232a77c | 2164 | } |
2165 | ||
2166 | /* | |
2167 | * IP Neighbor table read using netlink interface. This is invoked | |
2168 | * at startup. | |
2169 | */ | |
d62a17ae | 2170 | int netlink_neigh_read(struct zebra_ns *zns) |
2232a77c | 2171 | { |
d62a17ae | 2172 | int ret; |
2232a77c | 2173 | |
d62a17ae | 2174 | /* Get IP neighbor table. */ |
2175 | ret = netlink_request_neigh(zns, AF_UNSPEC, RTM_GETNEIGH, 0); | |
2176 | if (ret < 0) | |
2177 | return ret; | |
2178 | ret = netlink_parse_info(netlink_neigh_table, &zns->netlink_cmd, zns, 0, | |
2179 | 1); | |
2232a77c | 2180 | |
d62a17ae | 2181 | return ret; |
2232a77c | 2182 | } |
2183 | ||
2184 | /* | |
2185 | * IP Neighbor table read using netlink interface. This is for a specific | |
2186 | * VLAN device. | |
2187 | */ | |
d62a17ae | 2188 | int netlink_neigh_read_for_vlan(struct zebra_ns *zns, struct interface *vlan_if) |
2232a77c | 2189 | { |
d62a17ae | 2190 | int ret = 0; |
2232a77c | 2191 | |
d62a17ae | 2192 | ret = netlink_request_neigh(zns, AF_UNSPEC, RTM_GETNEIGH, |
2193 | vlan_if->ifindex); | |
2194 | if (ret < 0) | |
2195 | return ret; | |
2196 | ret = netlink_parse_info(netlink_neigh_table, &zns->netlink_cmd, zns, 0, | |
2197 | 0); | |
2232a77c | 2198 | |
d62a17ae | 2199 | return ret; |
2232a77c | 2200 | } |
2201 | ||
d62a17ae | 2202 | int netlink_neigh_change(struct sockaddr_nl *snl, struct nlmsghdr *h, |
2203 | ns_id_t ns_id) | |
2232a77c | 2204 | { |
d62a17ae | 2205 | int len; |
2206 | struct ndmsg *ndm; | |
2232a77c | 2207 | |
d62a17ae | 2208 | if (!(h->nlmsg_type == RTM_NEWNEIGH || h->nlmsg_type == RTM_DELNEIGH)) |
2209 | return 0; | |
2232a77c | 2210 | |
d62a17ae | 2211 | /* Length validity. */ |
2212 | len = h->nlmsg_len - NLMSG_LENGTH(sizeof(struct ndmsg)); | |
2213 | if (len < 0) | |
2214 | return -1; | |
2232a77c | 2215 | |
d62a17ae | 2216 | /* Is this a notification for the MAC FDB or IP neighbor table? */ |
2217 | ndm = NLMSG_DATA(h); | |
2218 | if (ndm->ndm_family == AF_BRIDGE) | |
2219 | return netlink_macfdb_change(snl, h, len); | |
2232a77c | 2220 | |
d62a17ae | 2221 | if (ndm->ndm_type != RTN_UNICAST) |
2222 | return 0; | |
2232a77c | 2223 | |
d62a17ae | 2224 | if (ndm->ndm_family == AF_INET || ndm->ndm_family == AF_INET6) |
2225 | return netlink_ipneigh_change(snl, h, len); | |
2232a77c | 2226 | |
d62a17ae | 2227 | return 0; |
2232a77c | 2228 | } |
2229 | ||
d62a17ae | 2230 | static int netlink_neigh_update2(struct interface *ifp, struct ipaddr *ip, |
2231 | struct ethaddr *mac, u_int32_t flags, int cmd) | |
2232a77c | 2232 | { |
d62a17ae | 2233 | struct { |
2234 | struct nlmsghdr n; | |
2235 | struct ndmsg ndm; | |
2236 | char buf[256]; | |
2237 | } req; | |
2238 | int ipa_len; | |
2239 | ||
2240 | struct zebra_ns *zns = zebra_ns_lookup(NS_DEFAULT); | |
2241 | char buf[INET6_ADDRSTRLEN]; | |
2242 | char buf2[ETHER_ADDR_STRLEN]; | |
2243 | ||
2244 | memset(&req.n, 0, sizeof(req.n)); | |
2245 | memset(&req.ndm, 0, sizeof(req.ndm)); | |
2246 | ||
2247 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)); | |
2248 | req.n.nlmsg_flags = NLM_F_REQUEST; | |
2249 | if (cmd == RTM_NEWNEIGH) | |
2250 | req.n.nlmsg_flags |= (NLM_F_CREATE | NLM_F_REPLACE); | |
2251 | req.n.nlmsg_type = cmd; // RTM_NEWNEIGH or RTM_DELNEIGH | |
2252 | req.ndm.ndm_family = IS_IPADDR_V4(ip) ? AF_INET : AF_INET6; | |
2253 | req.ndm.ndm_state = flags; | |
2254 | req.ndm.ndm_ifindex = ifp->ifindex; | |
2255 | req.ndm.ndm_type = RTN_UNICAST; | |
2256 | req.ndm.ndm_flags = NTF_EXT_LEARNED; | |
2257 | ||
2258 | ||
2259 | ipa_len = IS_IPADDR_V4(ip) ? IPV4_MAX_BYTELEN : IPV6_MAX_BYTELEN; | |
2260 | addattr_l(&req.n, sizeof(req), NDA_DST, &ip->ip.addr, ipa_len); | |
2261 | if (mac) | |
2262 | addattr_l(&req.n, sizeof(req), NDA_LLADDR, mac, 6); | |
2263 | ||
2264 | if (IS_ZEBRA_DEBUG_KERNEL) | |
2265 | zlog_debug("Tx %s family %s IF %s(%u) Neigh %s MAC %s", | |
2266 | nl_msg_type_to_str(cmd), | |
2267 | nl_family_to_str(req.ndm.ndm_family), ifp->name, | |
2268 | ifp->ifindex, ipaddr2str(ip, buf, sizeof(buf)), | |
2269 | mac ? prefix_mac2str(mac, buf2, sizeof(buf2)) | |
2270 | : "null"); | |
2271 | ||
2272 | return netlink_talk(netlink_talk_filter, &req.n, &zns->netlink_cmd, zns, | |
2273 | 0); | |
2232a77c | 2274 | } |
2275 | ||
d62a17ae | 2276 | int kernel_add_mac(struct interface *ifp, vlanid_t vid, struct ethaddr *mac, |
2277 | struct in_addr vtep_ip, u_char sticky) | |
2232a77c | 2278 | { |
d62a17ae | 2279 | return netlink_macfdb_update(ifp, vid, mac, vtep_ip, 0, RTM_NEWNEIGH, |
2280 | sticky); | |
2232a77c | 2281 | } |
2282 | ||
d62a17ae | 2283 | int kernel_del_mac(struct interface *ifp, vlanid_t vid, struct ethaddr *mac, |
2284 | struct in_addr vtep_ip, int local) | |
2232a77c | 2285 | { |
d62a17ae | 2286 | return netlink_macfdb_update(ifp, vid, mac, vtep_ip, local, |
2287 | RTM_DELNEIGH, 0); | |
2232a77c | 2288 | } |
2289 | ||
d62a17ae | 2290 | int kernel_add_neigh(struct interface *ifp, struct ipaddr *ip, |
2291 | struct ethaddr *mac) | |
2232a77c | 2292 | { |
d62a17ae | 2293 | return netlink_neigh_update2(ifp, ip, mac, NUD_REACHABLE, RTM_NEWNEIGH); |
2232a77c | 2294 | } |
2295 | ||
d62a17ae | 2296 | int kernel_del_neigh(struct interface *ifp, struct ipaddr *ip) |
2232a77c | 2297 | { |
d62a17ae | 2298 | return netlink_neigh_update2(ifp, ip, NULL, 0, RTM_DELNEIGH); |
2232a77c | 2299 | } |
2300 | ||
40c7bdb0 | 2301 | /* |
2302 | * MPLS label forwarding table change via netlink interface. | |
2303 | */ | |
d62a17ae | 2304 | int netlink_mpls_multipath(int cmd, zebra_lsp_t *lsp) |
40c7bdb0 | 2305 | { |
d62a17ae | 2306 | mpls_lse_t lse; |
2307 | zebra_nhlfe_t *nhlfe; | |
2308 | struct nexthop *nexthop = NULL; | |
2309 | unsigned int nexthop_num; | |
2310 | const char *routedesc; | |
2311 | struct zebra_ns *zns = zebra_ns_lookup(NS_DEFAULT); | |
805444ce | 2312 | int route_type; |
d62a17ae | 2313 | |
2314 | struct { | |
2315 | struct nlmsghdr n; | |
2316 | struct rtmsg r; | |
2317 | char buf[NL_PKT_BUF_SIZE]; | |
2318 | } req; | |
2319 | ||
2320 | memset(&req, 0, sizeof req - NL_PKT_BUF_SIZE); | |
2321 | ||
d62a17ae | 2322 | /* |
2323 | * Count # nexthops so we can decide whether to use singlepath | |
2324 | * or multipath case. | |
2325 | */ | |
2326 | nexthop_num = 0; | |
2327 | for (nhlfe = lsp->nhlfe_list; nhlfe; nhlfe = nhlfe->next) { | |
2328 | nexthop = nhlfe->nexthop; | |
2329 | if (!nexthop) | |
2330 | continue; | |
2331 | if (cmd == RTM_NEWROUTE) { | |
2332 | /* Count all selected NHLFEs */ | |
2333 | if (CHECK_FLAG(nhlfe->flags, NHLFE_FLAG_SELECTED) | |
2334 | && CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE)) | |
2335 | nexthop_num++; | |
2336 | } else /* DEL */ | |
2337 | { | |
2338 | /* Count all installed NHLFEs */ | |
2339 | if (CHECK_FLAG(nhlfe->flags, NHLFE_FLAG_INSTALLED) | |
2340 | && CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB)) | |
2341 | nexthop_num++; | |
2342 | } | |
2343 | } | |
2344 | ||
8dc8a4b6 | 2345 | if ((nexthop_num == 0) || (!lsp->best_nhlfe && (cmd != RTM_DELROUTE))) |
d62a17ae | 2346 | return 0; |
2347 | ||
2348 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)); | |
2349 | req.n.nlmsg_flags = NLM_F_CREATE | NLM_F_REQUEST; | |
2350 | req.n.nlmsg_type = cmd; | |
2351 | req.n.nlmsg_pid = zns->netlink_cmd.snl.nl_pid; | |
2352 | ||
2353 | req.r.rtm_family = AF_MPLS; | |
2354 | req.r.rtm_table = RT_TABLE_MAIN; | |
2355 | req.r.rtm_dst_len = MPLS_LABEL_LEN_BITS; | |
d62a17ae | 2356 | req.r.rtm_scope = RT_SCOPE_UNIVERSE; |
2357 | req.r.rtm_type = RTN_UNICAST; | |
2358 | ||
8dc8a4b6 | 2359 | if (cmd == RTM_NEWROUTE) { |
d62a17ae | 2360 | /* We do a replace to handle update. */ |
2361 | req.n.nlmsg_flags |= NLM_F_REPLACE; | |
2362 | ||
8dc8a4b6 DS |
2363 | /* set the protocol value if installing */ |
2364 | route_type = re_type_from_lsp_type(lsp->best_nhlfe->type); | |
2365 | req.r.rtm_protocol = zebra2proto(route_type); | |
2366 | } | |
2367 | ||
d62a17ae | 2368 | /* Fill destination */ |
2369 | lse = mpls_lse_encode(lsp->ile.in_label, 0, 0, 1); | |
2370 | addattr_l(&req.n, sizeof req, RTA_DST, &lse, sizeof(mpls_lse_t)); | |
2371 | ||
2372 | /* Fill nexthops (paths) based on single-path or multipath. The paths | |
2373 | * chosen depend on the operation. | |
2374 | */ | |
2375 | if (nexthop_num == 1 || multipath_num == 1) { | |
8b1450b9 | 2376 | routedesc = "single-path"; |
d62a17ae | 2377 | _netlink_mpls_debug(cmd, lsp->ile.in_label, routedesc); |
2378 | ||
2379 | nexthop_num = 0; | |
2380 | for (nhlfe = lsp->nhlfe_list; nhlfe; nhlfe = nhlfe->next) { | |
2381 | nexthop = nhlfe->nexthop; | |
2382 | if (!nexthop) | |
2383 | continue; | |
2384 | ||
2385 | if ((cmd == RTM_NEWROUTE | |
2386 | && (CHECK_FLAG(nhlfe->flags, NHLFE_FLAG_SELECTED) | |
2387 | && CHECK_FLAG(nexthop->flags, | |
2388 | NEXTHOP_FLAG_ACTIVE))) | |
2389 | || (cmd == RTM_DELROUTE | |
2390 | && (CHECK_FLAG(nhlfe->flags, | |
2391 | NHLFE_FLAG_INSTALLED) | |
2392 | && CHECK_FLAG(nexthop->flags, | |
2393 | NEXTHOP_FLAG_FIB)))) { | |
2394 | /* Add the gateway */ | |
2395 | _netlink_mpls_build_singlepath(routedesc, nhlfe, | |
2396 | &req.n, &req.r, | |
2397 | sizeof req, cmd); | |
2398 | if (cmd == RTM_NEWROUTE) { | |
2399 | SET_FLAG(nhlfe->flags, | |
2400 | NHLFE_FLAG_INSTALLED); | |
2401 | SET_FLAG(nexthop->flags, | |
2402 | NEXTHOP_FLAG_FIB); | |
2403 | } else { | |
2404 | UNSET_FLAG(nhlfe->flags, | |
2405 | NHLFE_FLAG_INSTALLED); | |
2406 | UNSET_FLAG(nexthop->flags, | |
2407 | NEXTHOP_FLAG_FIB); | |
2408 | } | |
2409 | nexthop_num++; | |
2410 | break; | |
2411 | } | |
2412 | } | |
2413 | } else /* Multipath case */ | |
2414 | { | |
2415 | char buf[NL_PKT_BUF_SIZE]; | |
2416 | struct rtattr *rta = (void *)buf; | |
2417 | struct rtnexthop *rtnh; | |
2418 | union g_addr *src1 = NULL; | |
2419 | ||
2420 | rta->rta_type = RTA_MULTIPATH; | |
2421 | rta->rta_len = RTA_LENGTH(0); | |
2422 | rtnh = RTA_DATA(rta); | |
2423 | ||
8b1450b9 | 2424 | routedesc = "multipath"; |
d62a17ae | 2425 | _netlink_mpls_debug(cmd, lsp->ile.in_label, routedesc); |
2426 | ||
2427 | nexthop_num = 0; | |
2428 | for (nhlfe = lsp->nhlfe_list; nhlfe; nhlfe = nhlfe->next) { | |
2429 | nexthop = nhlfe->nexthop; | |
2430 | if (!nexthop) | |
2431 | continue; | |
2432 | ||
2433 | if (nexthop_num >= multipath_num) | |
2434 | break; | |
2435 | ||
2436 | if ((cmd == RTM_NEWROUTE | |
2437 | && (CHECK_FLAG(nhlfe->flags, NHLFE_FLAG_SELECTED) | |
2438 | && CHECK_FLAG(nexthop->flags, | |
2439 | NEXTHOP_FLAG_ACTIVE))) | |
2440 | || (cmd == RTM_DELROUTE | |
2441 | && (CHECK_FLAG(nhlfe->flags, | |
2442 | NHLFE_FLAG_INSTALLED) | |
2443 | && CHECK_FLAG(nexthop->flags, | |
2444 | NEXTHOP_FLAG_FIB)))) { | |
2445 | nexthop_num++; | |
2446 | ||
2447 | /* Build the multipath */ | |
2448 | _netlink_mpls_build_multipath(routedesc, nhlfe, | |
2449 | rta, rtnh, &req.r, | |
2450 | &src1); | |
2451 | rtnh = RTNH_NEXT(rtnh); | |
2452 | ||
2453 | if (cmd == RTM_NEWROUTE) { | |
2454 | SET_FLAG(nhlfe->flags, | |
2455 | NHLFE_FLAG_INSTALLED); | |
2456 | SET_FLAG(nexthop->flags, | |
2457 | NEXTHOP_FLAG_FIB); | |
2458 | } else { | |
2459 | UNSET_FLAG(nhlfe->flags, | |
2460 | NHLFE_FLAG_INSTALLED); | |
2461 | UNSET_FLAG(nexthop->flags, | |
2462 | NEXTHOP_FLAG_FIB); | |
2463 | } | |
2464 | } | |
2465 | } | |
2466 | ||
2467 | /* Add the multipath */ | |
2468 | if (rta->rta_len > RTA_LENGTH(0)) | |
2469 | addattr_l(&req.n, NL_PKT_BUF_SIZE, RTA_MULTIPATH, | |
2470 | RTA_DATA(rta), RTA_PAYLOAD(rta)); | |
2471 | } | |
2472 | ||
2473 | /* Talk to netlink socket. */ | |
2474 | return netlink_talk(netlink_talk_filter, &req.n, &zns->netlink_cmd, zns, | |
2475 | 0); | |
40c7bdb0 | 2476 | } |
ddfeb486 | 2477 | #endif /* HAVE_NETLINK */ |