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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 | 100 | || (proto == RTPROT_LDP) || (proto == RTPROT_BABEL) |
8a71d93d | 101 | || (proto == RTPROT_RIP) || (proto == RTPROT_SHARP)) { |
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; | |
8a71d93d DS |
142 | case ZEBRA_ROUTE_SHARP: |
143 | proto = RTPROT_SHARP; | |
144 | break; | |
d62a17ae | 145 | default: |
146 | proto = RTPROT_ZEBRA; | |
147 | break; | |
148 | } | |
149 | ||
150 | return proto; | |
23b1f334 DD |
151 | } |
152 | ||
915902cb DS |
153 | static inline int proto2zebra(int proto, int family) |
154 | { | |
155 | switch (proto) { | |
156 | case RTPROT_BABEL: | |
157 | proto = ZEBRA_ROUTE_BABEL; | |
158 | break; | |
159 | case RTPROT_BGP: | |
160 | proto = ZEBRA_ROUTE_BGP; | |
161 | break; | |
162 | case RTPROT_OSPF: | |
163 | proto = (family == AFI_IP) ? | |
164 | ZEBRA_ROUTE_OSPF : ZEBRA_ROUTE_OSPF6; | |
165 | break; | |
166 | case RTPROT_ISIS: | |
167 | proto = ZEBRA_ROUTE_ISIS; | |
168 | break; | |
169 | case RTPROT_RIP: | |
170 | proto = ZEBRA_ROUTE_RIP; | |
171 | break; | |
172 | case RTPROT_RIPNG: | |
173 | proto = ZEBRA_ROUTE_RIPNG; | |
174 | break; | |
175 | case RTPROT_NHRP: | |
176 | proto = ZEBRA_ROUTE_NHRP; | |
177 | break; | |
178 | case RTPROT_EIGRP: | |
179 | proto = ZEBRA_ROUTE_EIGRP; | |
180 | break; | |
181 | case RTPROT_LDP: | |
182 | proto = ZEBRA_ROUTE_LDP; | |
183 | break; | |
184 | case RTPROT_STATIC: | |
185 | proto = ZEBRA_ROUTE_STATIC; | |
186 | break; | |
187 | default: | |
188 | proto = ZEBRA_ROUTE_KERNEL; | |
189 | break; | |
190 | } | |
191 | return proto; | |
192 | } | |
193 | ||
12f6fb97 DS |
194 | /* |
195 | Pending: create an efficient table_id (in a tree/hash) based lookup) | |
196 | */ | |
d62a17ae | 197 | static vrf_id_t vrf_lookup_by_table(u_int32_t table_id) |
12f6fb97 | 198 | { |
d62a17ae | 199 | struct vrf *vrf; |
200 | struct zebra_vrf *zvrf; | |
12f6fb97 | 201 | |
a2addae8 | 202 | RB_FOREACH (vrf, vrf_id_head, &vrfs_by_id) { |
d62a17ae | 203 | if ((zvrf = vrf->info) == NULL || (zvrf->table_id != table_id)) |
204 | continue; | |
12f6fb97 | 205 | |
d62a17ae | 206 | return zvrf_id(zvrf); |
207 | } | |
12f6fb97 | 208 | |
d62a17ae | 209 | return VRF_DEFAULT; |
12f6fb97 DS |
210 | } |
211 | ||
718e3744 | 212 | /* Looking up routing table by netlink interface. */ |
d62a17ae | 213 | static int netlink_route_change_read_unicast(struct sockaddr_nl *snl, |
214 | struct nlmsghdr *h, ns_id_t ns_id, | |
215 | int startup) | |
718e3744 | 216 | { |
d62a17ae | 217 | int len; |
218 | struct rtmsg *rtm; | |
219 | struct rtattr *tb[RTA_MAX + 1]; | |
220 | u_char flags = 0; | |
221 | struct prefix p; | |
792fa92e | 222 | struct prefix_ipv6 src_p = {}; |
d62a17ae | 223 | vrf_id_t vrf_id = VRF_DEFAULT; |
224 | ||
225 | char anyaddr[16] = {0}; | |
226 | ||
915902cb | 227 | int proto = ZEBRA_ROUTE_KERNEL; |
d62a17ae | 228 | int index = 0; |
229 | int table; | |
230 | int metric = 0; | |
231 | u_int32_t mtu = 0; | |
25715c7e | 232 | uint8_t distance = 0; |
4e40b6d6 | 233 | route_tag_t tag = 0; |
d62a17ae | 234 | |
235 | void *dest = NULL; | |
236 | void *gate = NULL; | |
237 | void *prefsrc = NULL; /* IPv4 preferred source host address */ | |
238 | void *src = NULL; /* IPv6 srcdest source prefix */ | |
e655a03c | 239 | enum blackhole_type bh_type = BLACKHOLE_UNSPEC; |
d62a17ae | 240 | |
241 | rtm = NLMSG_DATA(h); | |
242 | ||
243 | if (startup && h->nlmsg_type != RTM_NEWROUTE) | |
244 | return 0; | |
e655a03c DL |
245 | switch (rtm->rtm_type) { |
246 | case RTN_UNICAST: | |
247 | break; | |
248 | case RTN_BLACKHOLE: | |
249 | bh_type = BLACKHOLE_NULL; | |
250 | break; | |
251 | case RTN_UNREACHABLE: | |
252 | bh_type = BLACKHOLE_REJECT; | |
253 | break; | |
254 | case RTN_PROHIBIT: | |
255 | bh_type = BLACKHOLE_ADMINPROHIB; | |
256 | break; | |
257 | default: | |
d62a17ae | 258 | return 0; |
e655a03c | 259 | } |
d62a17ae | 260 | |
261 | len = h->nlmsg_len - NLMSG_LENGTH(sizeof(struct rtmsg)); | |
262 | if (len < 0) | |
263 | return -1; | |
264 | ||
265 | memset(tb, 0, sizeof tb); | |
266 | netlink_parse_rtattr(tb, RTA_MAX, RTM_RTA(rtm), len); | |
267 | ||
268 | if (rtm->rtm_flags & RTM_F_CLONED) | |
269 | return 0; | |
270 | if (rtm->rtm_protocol == RTPROT_REDIRECT) | |
271 | return 0; | |
272 | if (rtm->rtm_protocol == RTPROT_KERNEL) | |
273 | return 0; | |
274 | ||
275 | if (!startup && is_selfroute(rtm->rtm_protocol) | |
276 | && h->nlmsg_type == RTM_NEWROUTE) | |
277 | return 0; | |
278 | ||
279 | /* We don't care about change notifications for the MPLS table. */ | |
280 | /* TODO: Revisit this. */ | |
281 | if (rtm->rtm_family == AF_MPLS) | |
282 | return 0; | |
283 | ||
284 | /* Table corresponding to route. */ | |
285 | if (tb[RTA_TABLE]) | |
286 | table = *(int *)RTA_DATA(tb[RTA_TABLE]); | |
287 | else | |
288 | table = rtm->rtm_table; | |
289 | ||
290 | /* Map to VRF */ | |
291 | vrf_id = vrf_lookup_by_table(table); | |
292 | if (vrf_id == VRF_DEFAULT) { | |
293 | if (!is_zebra_valid_kernel_table(table) | |
294 | && !is_zebra_main_routing_table(table)) | |
295 | return 0; | |
296 | } | |
297 | ||
298 | /* Route which inserted by Zebra. */ | |
915902cb | 299 | if (is_selfroute(rtm->rtm_protocol)) { |
d62a17ae | 300 | flags |= ZEBRA_FLAG_SELFROUTE; |
915902cb DS |
301 | proto = proto2zebra(rtm->rtm_protocol, rtm->rtm_family); |
302 | } | |
d62a17ae | 303 | if (tb[RTA_OIF]) |
304 | index = *(int *)RTA_DATA(tb[RTA_OIF]); | |
305 | ||
306 | if (tb[RTA_DST]) | |
307 | dest = RTA_DATA(tb[RTA_DST]); | |
308 | else | |
309 | dest = anyaddr; | |
310 | ||
311 | if (tb[RTA_SRC]) | |
312 | src = RTA_DATA(tb[RTA_SRC]); | |
313 | else | |
314 | src = anyaddr; | |
315 | ||
316 | if (tb[RTA_PREFSRC]) | |
317 | prefsrc = RTA_DATA(tb[RTA_PREFSRC]); | |
318 | ||
319 | if (tb[RTA_GATEWAY]) | |
320 | gate = RTA_DATA(tb[RTA_GATEWAY]); | |
321 | ||
f19435a8 DS |
322 | if (tb[RTA_PRIORITY]) |
323 | metric = *(int *)RTA_DATA(tb[RTA_PRIORITY]); | |
d62a17ae | 324 | |
4e40b6d6 KK |
325 | #if defined(SUPPORT_REALMS) |
326 | if (tb[RTA_FLOW]) | |
327 | tag = *(uint32_t *)RTA_DATA(tb[RTA_FLOW]); | |
328 | #endif | |
329 | ||
f19435a8 DS |
330 | if (tb[RTA_METRICS]) { |
331 | struct rtattr *mxrta[RTAX_MAX + 1]; | |
d62a17ae | 332 | |
f19435a8 DS |
333 | memset(mxrta, 0, sizeof mxrta); |
334 | netlink_parse_rtattr(mxrta, RTAX_MAX, | |
335 | RTA_DATA(tb[RTA_METRICS]), | |
336 | RTA_PAYLOAD(tb[RTA_METRICS])); | |
d62a17ae | 337 | |
f19435a8 DS |
338 | if (mxrta[RTAX_MTU]) |
339 | mtu = *(u_int32_t *)RTA_DATA(mxrta[RTAX_MTU]); | |
d62a17ae | 340 | } |
341 | ||
342 | if (rtm->rtm_family == AF_INET) { | |
343 | p.family = AF_INET; | |
344 | memcpy(&p.u.prefix4, dest, 4); | |
345 | p.prefixlen = rtm->rtm_dst_len; | |
346 | ||
347 | src_p.prefixlen = | |
348 | 0; // Forces debug below to not display anything | |
349 | } else if (rtm->rtm_family == AF_INET6) { | |
350 | p.family = AF_INET6; | |
351 | memcpy(&p.u.prefix6, dest, 16); | |
352 | p.prefixlen = rtm->rtm_dst_len; | |
353 | ||
354 | src_p.family = AF_INET6; | |
355 | memcpy(&src_p.prefix, src, 16); | |
356 | src_p.prefixlen = rtm->rtm_src_len; | |
357 | } | |
358 | ||
359 | if (rtm->rtm_src_len != 0) { | |
360 | char buf[PREFIX_STRLEN]; | |
361 | zlog_warn( | |
362 | "unsupported IPv[4|6] sourcedest route (dest %s vrf %u)", | |
363 | prefix2str(&p, buf, sizeof(buf)), vrf_id); | |
364 | return 0; | |
365 | } | |
366 | ||
25715c7e DS |
367 | /* |
368 | * For ZEBRA_ROUTE_KERNEL types: | |
369 | * | |
370 | * The metric/priority of the route received from the kernel | |
371 | * is a 32 bit number. We are going to interpret the high | |
372 | * order byte as the Admin Distance and the low order 3 bytes | |
373 | * as the metric. | |
374 | * | |
375 | * This will allow us to do two things: | |
376 | * 1) Allow the creation of kernel routes that can be | |
377 | * overridden by zebra. | |
378 | * 2) Allow the old behavior for 'most' kernel route types | |
379 | * if a user enters 'ip route ...' v4 routes get a metric | |
380 | * of 0 and v6 routes get a metric of 1024. Both of these | |
381 | * values will end up with a admin distance of 0, which | |
382 | * will cause them to win for the purposes of zebra. | |
383 | */ | |
384 | if (proto == ZEBRA_ROUTE_KERNEL) { | |
385 | distance = (metric >> 24) & 0xFF; | |
386 | metric = (metric & 0x00FFFFFF); | |
387 | } | |
388 | ||
d62a17ae | 389 | if (IS_ZEBRA_DEBUG_KERNEL) { |
390 | char buf[PREFIX_STRLEN]; | |
391 | char buf2[PREFIX_STRLEN]; | |
392 | zlog_debug( | |
25715c7e | 393 | "%s %s%s%s vrf %u metric: %d Admin Distance: %d", nl_msg_type_to_str(h->nlmsg_type), |
d62a17ae | 394 | prefix2str(&p, buf, sizeof(buf)), |
395 | src_p.prefixlen ? " from " : "", | |
396 | src_p.prefixlen ? prefix2str(&src_p, buf2, sizeof(buf2)) | |
397 | : "", | |
25715c7e | 398 | vrf_id, metric, distance); |
d62a17ae | 399 | } |
400 | ||
401 | afi_t afi = AFI_IP; | |
402 | if (rtm->rtm_family == AF_INET6) | |
403 | afi = AFI_IP6; | |
404 | ||
405 | if (h->nlmsg_type == RTM_NEWROUTE) { | |
8795f904 DS |
406 | struct interface *ifp; |
407 | vrf_id_t nh_vrf_id = vrf_id; | |
408 | ||
fd36be7e DL |
409 | if (!tb[RTA_MULTIPATH]) { |
410 | struct nexthop nh; | |
411 | size_t sz = (afi == AFI_IP) ? 4 : 16; | |
412 | ||
413 | memset(&nh, 0, sizeof(nh)); | |
af760ec1 DS |
414 | |
415 | if (bh_type == BLACKHOLE_UNSPEC) { | |
416 | if (index && !gate) | |
417 | nh.type = NEXTHOP_TYPE_IFINDEX; | |
418 | else if (index && gate) | |
1dca2eaa | 419 | nh.type = (afi == AFI_IP) |
af760ec1 DS |
420 | ? NEXTHOP_TYPE_IPV4_IFINDEX |
421 | : NEXTHOP_TYPE_IPV6_IFINDEX; | |
422 | else if (!index && gate) | |
1dca2eaa RW |
423 | nh.type = (afi == AFI_IP) |
424 | ? NEXTHOP_TYPE_IPV4 | |
425 | : NEXTHOP_TYPE_IPV6; | |
af760ec1 DS |
426 | else { |
427 | nh.type = NEXTHOP_TYPE_BLACKHOLE; | |
428 | nh.bh_type = bh_type; | |
429 | } | |
430 | } else { | |
fd36be7e | 431 | nh.type = NEXTHOP_TYPE_BLACKHOLE; |
e655a03c DL |
432 | nh.bh_type = bh_type; |
433 | } | |
fd36be7e DL |
434 | nh.ifindex = index; |
435 | if (prefsrc) | |
436 | memcpy(&nh.src, prefsrc, sz); | |
437 | if (gate) | |
438 | memcpy(&nh.gate, gate, sz); | |
915902cb | 439 | |
8795f904 DS |
440 | if (index) { |
441 | ifp = if_lookup_by_index(index, | |
442 | VRF_UNKNOWN); | |
443 | if (ifp) | |
444 | nh_vrf_id = ifp->vrf_id; | |
445 | } | |
446 | ||
447 | rib_add(afi, SAFI_UNICAST, vrf_id, nh_vrf_id, proto, | |
4e40b6d6 KK |
448 | 0, flags, &p, NULL, &nh, table, metric, |
449 | mtu, distance, tag); | |
fd36be7e | 450 | } else { |
d62a17ae | 451 | /* This is a multipath route */ |
452 | ||
453 | struct route_entry *re; | |
454 | struct rtnexthop *rtnh = | |
455 | (struct rtnexthop *)RTA_DATA(tb[RTA_MULTIPATH]); | |
456 | ||
457 | len = RTA_PAYLOAD(tb[RTA_MULTIPATH]); | |
458 | ||
459 | re = XCALLOC(MTYPE_RE, sizeof(struct route_entry)); | |
915902cb | 460 | re->type = proto; |
25715c7e | 461 | re->distance = distance; |
d62a17ae | 462 | re->flags = flags; |
463 | re->metric = metric; | |
464 | re->mtu = mtu; | |
465 | re->vrf_id = vrf_id; | |
8f43b4d8 | 466 | re->nh_vrf_id = vrf_id; |
d62a17ae | 467 | re->table = table; |
468 | re->nexthop_num = 0; | |
469 | re->uptime = time(NULL); | |
4e40b6d6 | 470 | re->tag = tag; |
d62a17ae | 471 | |
472 | for (;;) { | |
473 | if (len < (int)sizeof(*rtnh) | |
474 | || rtnh->rtnh_len > len) | |
475 | break; | |
476 | ||
477 | index = rtnh->rtnh_ifindex; | |
8795f904 DS |
478 | if (index) { |
479 | /* | |
480 | * Yes we are looking this up | |
481 | * for every nexthop and just | |
482 | * using the last one looked | |
483 | * up right now | |
484 | */ | |
485 | ifp = if_lookup_by_index(index, | |
486 | VRF_UNKNOWN); | |
487 | if (ifp) | |
488 | re->nh_vrf_id = ifp->vrf_id; | |
489 | } | |
d62a17ae | 490 | gate = 0; |
491 | if (rtnh->rtnh_len > sizeof(*rtnh)) { | |
492 | memset(tb, 0, sizeof(tb)); | |
493 | netlink_parse_rtattr( | |
494 | tb, RTA_MAX, RTNH_DATA(rtnh), | |
495 | rtnh->rtnh_len - sizeof(*rtnh)); | |
496 | if (tb[RTA_GATEWAY]) | |
497 | gate = RTA_DATA( | |
498 | tb[RTA_GATEWAY]); | |
499 | } | |
500 | ||
501 | if (gate) { | |
502 | if (rtm->rtm_family == AF_INET) { | |
503 | if (index) | |
504 | route_entry_nexthop_ipv4_ifindex_add( | |
505 | re, gate, | |
506 | prefsrc, index); | |
507 | else | |
508 | route_entry_nexthop_ipv4_add( | |
509 | re, gate, | |
510 | prefsrc); | |
511 | } else if (rtm->rtm_family | |
512 | == AF_INET6) { | |
513 | if (index) | |
514 | route_entry_nexthop_ipv6_ifindex_add( | |
515 | re, gate, | |
516 | index); | |
517 | else | |
518 | route_entry_nexthop_ipv6_add( | |
519 | re, gate); | |
520 | } | |
521 | } else | |
522 | route_entry_nexthop_ifindex_add(re, | |
523 | index); | |
524 | ||
525 | len -= NLMSG_ALIGN(rtnh->rtnh_len); | |
526 | rtnh = RTNH_NEXT(rtnh); | |
527 | } | |
528 | ||
529 | zserv_nexthop_num_warn(__func__, | |
530 | (const struct prefix *)&p, | |
531 | re->nexthop_num); | |
532 | if (re->nexthop_num == 0) | |
533 | XFREE(MTYPE_RE, re); | |
534 | else | |
7990990e | 535 | rib_add_multipath(afi, SAFI_UNICAST, &p, |
d62a17ae | 536 | NULL, re); |
537 | } | |
538 | } else { | |
fd36be7e DL |
539 | if (!tb[RTA_MULTIPATH]) { |
540 | struct nexthop nh; | |
541 | size_t sz = (afi == AFI_IP) ? 4 : 16; | |
542 | ||
543 | memset(&nh, 0, sizeof(nh)); | |
8ba5bd58 RW |
544 | if (bh_type == BLACKHOLE_UNSPEC) { |
545 | if (index && !gate) | |
546 | nh.type = NEXTHOP_TYPE_IFINDEX; | |
547 | else if (index && gate) | |
548 | nh.type = | |
549 | (afi == AFI_IP) | |
550 | ? NEXTHOP_TYPE_IPV4_IFINDEX | |
551 | : NEXTHOP_TYPE_IPV6_IFINDEX; | |
552 | else if (!index && gate) | |
553 | nh.type = (afi == AFI_IP) | |
554 | ? NEXTHOP_TYPE_IPV4 | |
60466a63 | 555 | : NEXTHOP_TYPE_IPV6; |
8ba5bd58 RW |
556 | else { |
557 | nh.type = NEXTHOP_TYPE_BLACKHOLE; | |
558 | nh.bh_type = BLACKHOLE_UNSPEC; | |
559 | } | |
560 | } else { | |
fd36be7e | 561 | nh.type = NEXTHOP_TYPE_BLACKHOLE; |
8ba5bd58 RW |
562 | nh.bh_type = bh_type; |
563 | } | |
fd36be7e DL |
564 | nh.ifindex = index; |
565 | if (gate) | |
566 | memcpy(&nh.gate, gate, sz); | |
d62a17ae | 567 | rib_delete(afi, SAFI_UNICAST, vrf_id, |
915902cb | 568 | proto, 0, flags, &p, NULL, &nh, |
6134fd82 | 569 | table, metric, true, NULL); |
fd36be7e DL |
570 | } else { |
571 | /* XXX: need to compare the entire list of nexthops | |
572 | * here for NLM_F_APPEND stupidity */ | |
573 | rib_delete(afi, SAFI_UNICAST, vrf_id, | |
915902cb | 574 | proto, 0, flags, &p, NULL, NULL, |
6134fd82 | 575 | table, metric, true, NULL); |
d62a17ae | 576 | } |
577 | } | |
578 | ||
579 | return 0; | |
718e3744 | 580 | } |
581 | ||
e3be0432 DS |
582 | static struct mcast_route_data *mroute = NULL; |
583 | ||
d62a17ae | 584 | static int netlink_route_change_read_multicast(struct sockaddr_nl *snl, |
585 | struct nlmsghdr *h, | |
586 | ns_id_t ns_id, int startup) | |
565fdc75 | 587 | { |
d62a17ae | 588 | int len; |
589 | struct rtmsg *rtm; | |
590 | struct rtattr *tb[RTA_MAX + 1]; | |
591 | struct mcast_route_data *m; | |
592 | struct mcast_route_data mr; | |
593 | int iif = 0; | |
594 | int count; | |
595 | int oif[256]; | |
596 | int oif_count = 0; | |
597 | char sbuf[40]; | |
598 | char gbuf[40]; | |
599 | char oif_list[256] = "\0"; | |
600 | vrf_id_t vrf = ns_id; | |
43b5cc5e | 601 | int table; |
d62a17ae | 602 | |
603 | if (mroute) | |
604 | m = mroute; | |
605 | else { | |
606 | memset(&mr, 0, sizeof(mr)); | |
607 | m = &mr; | |
608 | } | |
609 | ||
610 | rtm = NLMSG_DATA(h); | |
611 | ||
612 | len = h->nlmsg_len - NLMSG_LENGTH(sizeof(struct rtmsg)); | |
613 | ||
614 | memset(tb, 0, sizeof tb); | |
615 | netlink_parse_rtattr(tb, RTA_MAX, RTM_RTA(rtm), len); | |
90d82769 | 616 | |
43b5cc5e DS |
617 | if (tb[RTA_TABLE]) |
618 | table = *(int *)RTA_DATA(tb[RTA_TABLE]); | |
619 | else | |
620 | table = rtm->rtm_table; | |
621 | ||
622 | vrf = vrf_lookup_by_table(table); | |
623 | ||
d62a17ae | 624 | if (tb[RTA_IIF]) |
625 | iif = *(int *)RTA_DATA(tb[RTA_IIF]); | |
626 | ||
627 | if (tb[RTA_SRC]) | |
bd8b9272 | 628 | m->sg.src = *(struct in_addr *)RTA_DATA(tb[RTA_SRC]); |
d62a17ae | 629 | |
630 | if (tb[RTA_DST]) | |
bd8b9272 | 631 | m->sg.grp = *(struct in_addr *)RTA_DATA(tb[RTA_DST]); |
d62a17ae | 632 | |
633 | if ((RTA_EXPIRES <= RTA_MAX) && tb[RTA_EXPIRES]) | |
634 | m->lastused = *(unsigned long long *)RTA_DATA(tb[RTA_EXPIRES]); | |
635 | ||
636 | if (tb[RTA_MULTIPATH]) { | |
637 | struct rtnexthop *rtnh = | |
638 | (struct rtnexthop *)RTA_DATA(tb[RTA_MULTIPATH]); | |
639 | ||
640 | len = RTA_PAYLOAD(tb[RTA_MULTIPATH]); | |
641 | for (;;) { | |
642 | if (len < (int)sizeof(*rtnh) || rtnh->rtnh_len > len) | |
643 | break; | |
644 | ||
645 | oif[oif_count] = rtnh->rtnh_ifindex; | |
646 | oif_count++; | |
647 | ||
648 | len -= NLMSG_ALIGN(rtnh->rtnh_len); | |
649 | rtnh = RTNH_NEXT(rtnh); | |
650 | } | |
651 | } | |
652 | ||
653 | if (IS_ZEBRA_DEBUG_KERNEL) { | |
654 | struct interface *ifp; | |
0af35d90 RW |
655 | strlcpy(sbuf, inet_ntoa(m->sg.src), sizeof(sbuf)); |
656 | strlcpy(gbuf, inet_ntoa(m->sg.grp), sizeof(gbuf)); | |
d62a17ae | 657 | for (count = 0; count < oif_count; count++) { |
658 | ifp = if_lookup_by_index(oif[count], vrf); | |
659 | char temp[256]; | |
660 | ||
661 | sprintf(temp, "%s ", ifp->name); | |
662 | strcat(oif_list, temp); | |
663 | } | |
43b5cc5e | 664 | struct zebra_vrf *zvrf = zebra_vrf_lookup_by_id(vrf); |
d62a17ae | 665 | ifp = if_lookup_by_index(iif, vrf); |
43b5cc5e DS |
666 | zlog_debug( |
667 | "MCAST VRF: %s(%d) %s (%s,%s) IIF: %s OIF: %s jiffies: %lld", | |
668 | zvrf->vrf->name, vrf, nl_msg_type_to_str(h->nlmsg_type), | |
669 | sbuf, gbuf, ifp->name, oif_list, m->lastused); | |
90d82769 | 670 | } |
d62a17ae | 671 | return 0; |
565fdc75 DS |
672 | } |
673 | ||
d62a17ae | 674 | int netlink_route_change(struct sockaddr_nl *snl, struct nlmsghdr *h, |
675 | ns_id_t ns_id, int startup) | |
565fdc75 | 676 | { |
d62a17ae | 677 | int len; |
678 | vrf_id_t vrf_id = ns_id; | |
679 | struct rtmsg *rtm; | |
680 | ||
681 | rtm = NLMSG_DATA(h); | |
682 | ||
683 | if (!(h->nlmsg_type == RTM_NEWROUTE || h->nlmsg_type == RTM_DELROUTE)) { | |
684 | /* If this is not route add/delete message print warning. */ | |
685 | zlog_warn("Kernel message: %d vrf %u\n", h->nlmsg_type, vrf_id); | |
686 | return 0; | |
687 | } | |
688 | ||
689 | /* Connected route. */ | |
690 | if (IS_ZEBRA_DEBUG_KERNEL) | |
691 | zlog_debug("%s %s %s proto %s vrf %u", | |
692 | nl_msg_type_to_str(h->nlmsg_type), | |
693 | nl_family_to_str(rtm->rtm_family), | |
694 | nl_rttype_to_str(rtm->rtm_type), | |
695 | nl_rtproto_to_str(rtm->rtm_protocol), vrf_id); | |
696 | ||
697 | /* We don't care about change notifications for the MPLS table. */ | |
698 | /* TODO: Revisit this. */ | |
699 | if (rtm->rtm_family == AF_MPLS) | |
700 | return 0; | |
701 | ||
702 | len = h->nlmsg_len - NLMSG_LENGTH(sizeof(struct rtmsg)); | |
703 | if (len < 0) | |
704 | return -1; | |
705 | ||
e655a03c | 706 | if (rtm->rtm_type == RTN_MULTICAST) |
d62a17ae | 707 | netlink_route_change_read_multicast(snl, h, ns_id, startup); |
e655a03c DL |
708 | else |
709 | netlink_route_change_read_unicast(snl, h, ns_id, startup); | |
d62a17ae | 710 | return 0; |
565fdc75 DS |
711 | } |
712 | ||
289602d7 | 713 | /* Request for specific route information from the kernel */ |
d62a17ae | 714 | static int netlink_request_route(struct zebra_ns *zns, int family, int type) |
289602d7 | 715 | { |
d62a17ae | 716 | struct { |
717 | struct nlmsghdr n; | |
718 | struct rtmsg rtm; | |
719 | } req; | |
720 | ||
721 | /* Form the request, specifying filter (rtattr) if needed. */ | |
722 | memset(&req, 0, sizeof(req)); | |
723 | req.n.nlmsg_type = type; | |
724 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)); | |
725 | req.rtm.rtm_family = family; | |
726 | ||
727 | return netlink_request(&zns->netlink_cmd, &req.n); | |
289602d7 | 728 | } |
729 | ||
718e3744 | 730 | /* Routing table read function using netlink interface. Only called |
731 | bootstrap time. */ | |
d62a17ae | 732 | int netlink_route_read(struct zebra_ns *zns) |
718e3744 | 733 | { |
d62a17ae | 734 | int ret; |
735 | ||
736 | /* Get IPv4 routing table. */ | |
737 | ret = netlink_request_route(zns, AF_INET, RTM_GETROUTE); | |
738 | if (ret < 0) | |
739 | return ret; | |
740 | ret = netlink_parse_info(netlink_route_change_read_unicast, | |
741 | &zns->netlink_cmd, zns, 0, 1); | |
742 | if (ret < 0) | |
743 | return ret; | |
744 | ||
745 | /* Get IPv6 routing table. */ | |
746 | ret = netlink_request_route(zns, AF_INET6, RTM_GETROUTE); | |
747 | if (ret < 0) | |
748 | return ret; | |
749 | ret = netlink_parse_info(netlink_route_change_read_unicast, | |
750 | &zns->netlink_cmd, zns, 0, 1); | |
751 | if (ret < 0) | |
752 | return ret; | |
753 | ||
754 | return 0; | |
718e3744 | 755 | } |
756 | ||
d62a17ae | 757 | static void _netlink_route_nl_add_gateway_info(u_char route_family, |
758 | u_char gw_family, | |
759 | struct nlmsghdr *nlmsg, | |
760 | size_t req_size, int bytelen, | |
761 | struct nexthop *nexthop) | |
40c7bdb0 | 762 | { |
d62a17ae | 763 | if (route_family == AF_MPLS) { |
764 | struct gw_family_t gw_fam; | |
765 | ||
766 | gw_fam.family = gw_family; | |
767 | if (gw_family == AF_INET) | |
768 | memcpy(&gw_fam.gate.ipv4, &nexthop->gate.ipv4, bytelen); | |
769 | else | |
770 | memcpy(&gw_fam.gate.ipv6, &nexthop->gate.ipv6, bytelen); | |
771 | addattr_l(nlmsg, req_size, RTA_VIA, &gw_fam.family, | |
772 | bytelen + 2); | |
773 | } else { | |
774 | if (gw_family == AF_INET) | |
775 | addattr_l(nlmsg, req_size, RTA_GATEWAY, | |
776 | &nexthop->gate.ipv4, bytelen); | |
777 | else | |
778 | addattr_l(nlmsg, req_size, RTA_GATEWAY, | |
779 | &nexthop->gate.ipv6, bytelen); | |
780 | } | |
40c7bdb0 | 781 | } |
782 | ||
d62a17ae | 783 | static void _netlink_route_rta_add_gateway_info(u_char route_family, |
784 | u_char gw_family, | |
785 | struct rtattr *rta, | |
786 | struct rtnexthop *rtnh, | |
787 | size_t req_size, int bytelen, | |
788 | struct nexthop *nexthop) | |
40c7bdb0 | 789 | { |
d62a17ae | 790 | if (route_family == AF_MPLS) { |
791 | struct gw_family_t gw_fam; | |
792 | ||
793 | gw_fam.family = gw_family; | |
794 | if (gw_family == AF_INET) | |
795 | memcpy(&gw_fam.gate.ipv4, &nexthop->gate.ipv4, bytelen); | |
796 | else | |
797 | memcpy(&gw_fam.gate.ipv6, &nexthop->gate.ipv6, bytelen); | |
798 | rta_addattr_l(rta, req_size, RTA_VIA, &gw_fam.family, | |
799 | bytelen + 2); | |
800 | rtnh->rtnh_len += RTA_LENGTH(bytelen + 2); | |
801 | } else { | |
802 | if (gw_family == AF_INET) | |
803 | rta_addattr_l(rta, req_size, RTA_GATEWAY, | |
804 | &nexthop->gate.ipv4, bytelen); | |
805 | else | |
806 | rta_addattr_l(rta, req_size, RTA_GATEWAY, | |
807 | &nexthop->gate.ipv6, bytelen); | |
808 | rtnh->rtnh_len += sizeof(struct rtattr) + bytelen; | |
809 | } | |
40c7bdb0 | 810 | } |
811 | ||
fa713d9e CF |
812 | /* This function takes a nexthop as argument and adds |
813 | * the appropriate netlink attributes to an existing | |
814 | * netlink message. | |
815 | * | |
816 | * @param routedesc: Human readable description of route type | |
817 | * (direct/recursive, single-/multipath) | |
818 | * @param bytelen: Length of addresses in bytes. | |
819 | * @param nexthop: Nexthop information | |
820 | * @param nlmsg: nlmsghdr structure to fill in. | |
821 | * @param req_size: The size allocated for the message. | |
822 | */ | |
d62a17ae | 823 | static void _netlink_route_build_singlepath(const char *routedesc, int bytelen, |
824 | struct nexthop *nexthop, | |
825 | struct nlmsghdr *nlmsg, | |
826 | struct rtmsg *rtmsg, | |
827 | size_t req_size, int cmd) | |
fa713d9e | 828 | { |
8ecdb26e | 829 | struct mpls_label_stack *nh_label; |
d62a17ae | 830 | mpls_lse_t out_lse[MPLS_MAX_LABELS]; |
9a62e84b | 831 | char label_buf[256]; |
d62a17ae | 832 | |
833 | /* | |
834 | * label_buf is *only* currently used within debugging. | |
835 | * As such when we assign it we are guarding it inside | |
836 | * a debug test. If you want to change this make sure | |
837 | * you fix this assumption | |
838 | */ | |
839 | label_buf[0] = '\0'; | |
840 | /* outgoing label - either as NEWDST (in the case of LSR) or as ENCAP | |
841 | * (in the case of LER) | |
842 | */ | |
843 | nh_label = nexthop->nh_label; | |
844 | if (rtmsg->rtm_family == AF_MPLS) { | |
845 | assert(nh_label); | |
846 | assert(nh_label->num_labels == 1); | |
847 | } | |
848 | ||
849 | if (nh_label && nh_label->num_labels) { | |
850 | int i, num_labels = 0; | |
851 | u_int32_t bos; | |
852 | char label_buf1[20]; | |
853 | ||
854 | for (i = 0; i < nh_label->num_labels; i++) { | |
855 | if (nh_label->label[i] != MPLS_IMP_NULL_LABEL) { | |
856 | bos = ((i == (nh_label->num_labels - 1)) ? 1 | |
857 | : 0); | |
858 | out_lse[i] = mpls_lse_encode(nh_label->label[i], | |
859 | 0, 0, bos); | |
860 | if (IS_ZEBRA_DEBUG_KERNEL) { | |
861 | if (!num_labels) | |
9a62e84b | 862 | sprintf(label_buf, "label %u", |
d62a17ae | 863 | nh_label->label[i]); |
864 | else { | |
9a62e84b | 865 | sprintf(label_buf1, "/%u", |
d62a17ae | 866 | nh_label->label[i]); |
9a62e84b RW |
867 | strlcat(label_buf, label_buf1, |
868 | sizeof(label_buf)); | |
d62a17ae | 869 | } |
870 | } | |
871 | num_labels++; | |
872 | } | |
873 | } | |
874 | if (num_labels) { | |
875 | if (rtmsg->rtm_family == AF_MPLS) | |
876 | addattr_l(nlmsg, req_size, RTA_NEWDST, &out_lse, | |
877 | num_labels * sizeof(mpls_lse_t)); | |
878 | else { | |
879 | struct rtattr *nest; | |
880 | u_int16_t encap = LWTUNNEL_ENCAP_MPLS; | |
881 | ||
882 | addattr_l(nlmsg, req_size, RTA_ENCAP_TYPE, | |
883 | &encap, sizeof(u_int16_t)); | |
884 | nest = addattr_nest(nlmsg, req_size, RTA_ENCAP); | |
885 | addattr_l(nlmsg, req_size, MPLS_IPTUNNEL_DST, | |
886 | &out_lse, | |
887 | num_labels * sizeof(mpls_lse_t)); | |
888 | addattr_nest_end(nlmsg, nest); | |
889 | } | |
66d42727 | 890 | } |
0aabccc0 | 891 | } |
fa713d9e | 892 | |
d62a17ae | 893 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ONLINK)) |
894 | rtmsg->rtm_flags |= RTNH_F_ONLINK; | |
895 | ||
896 | if (rtmsg->rtm_family == AF_INET | |
897 | && (nexthop->type == NEXTHOP_TYPE_IPV6 | |
898 | || nexthop->type == NEXTHOP_TYPE_IPV6_IFINDEX)) { | |
899 | rtmsg->rtm_flags |= RTNH_F_ONLINK; | |
900 | addattr_l(nlmsg, req_size, RTA_GATEWAY, &ipv4_ll, 4); | |
901 | addattr32(nlmsg, req_size, RTA_OIF, nexthop->ifindex); | |
902 | ||
903 | if (nexthop->rmap_src.ipv4.s_addr && (cmd == RTM_NEWROUTE)) | |
904 | addattr_l(nlmsg, req_size, RTA_PREFSRC, | |
905 | &nexthop->rmap_src.ipv4, bytelen); | |
906 | else if (nexthop->src.ipv4.s_addr && (cmd == RTM_NEWROUTE)) | |
907 | addattr_l(nlmsg, req_size, RTA_PREFSRC, | |
908 | &nexthop->src.ipv4, bytelen); | |
909 | ||
910 | if (IS_ZEBRA_DEBUG_KERNEL) | |
911 | zlog_debug( | |
912 | " 5549: _netlink_route_build_singlepath() (%s): " | |
913 | "nexthop via %s %s if %u", | |
914 | routedesc, ipv4_ll_buf, label_buf, | |
915 | nexthop->ifindex); | |
916 | return; | |
0aabccc0 DD |
917 | } |
918 | ||
d62a17ae | 919 | if (nexthop->type == NEXTHOP_TYPE_IPV4 |
920 | || nexthop->type == NEXTHOP_TYPE_IPV4_IFINDEX) { | |
921 | /* Send deletes to the kernel without specifying the next-hop */ | |
922 | if (cmd != RTM_DELROUTE) | |
923 | _netlink_route_nl_add_gateway_info( | |
924 | rtmsg->rtm_family, AF_INET, nlmsg, req_size, | |
925 | bytelen, nexthop); | |
926 | ||
927 | if (cmd == RTM_NEWROUTE) { | |
928 | if (nexthop->rmap_src.ipv4.s_addr) | |
929 | addattr_l(nlmsg, req_size, RTA_PREFSRC, | |
930 | &nexthop->rmap_src.ipv4, bytelen); | |
931 | else if (nexthop->src.ipv4.s_addr) | |
932 | addattr_l(nlmsg, req_size, RTA_PREFSRC, | |
933 | &nexthop->src.ipv4, bytelen); | |
934 | } | |
935 | ||
936 | if (IS_ZEBRA_DEBUG_KERNEL) | |
937 | zlog_debug( | |
938 | "netlink_route_multipath() (%s): " | |
939 | "nexthop via %s %s if %u", | |
940 | routedesc, inet_ntoa(nexthop->gate.ipv4), | |
941 | label_buf, nexthop->ifindex); | |
0aabccc0 | 942 | } |
fa713d9e | 943 | |
d62a17ae | 944 | if (nexthop->type == NEXTHOP_TYPE_IPV6 |
945 | || nexthop->type == NEXTHOP_TYPE_IPV6_IFINDEX) { | |
946 | _netlink_route_nl_add_gateway_info(rtmsg->rtm_family, AF_INET6, | |
947 | nlmsg, req_size, bytelen, | |
948 | nexthop); | |
949 | ||
950 | if (cmd == RTM_NEWROUTE) { | |
951 | if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->rmap_src.ipv6)) | |
952 | addattr_l(nlmsg, req_size, RTA_PREFSRC, | |
953 | &nexthop->rmap_src.ipv6, bytelen); | |
954 | else if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->src.ipv6)) | |
955 | addattr_l(nlmsg, req_size, RTA_PREFSRC, | |
956 | &nexthop->src.ipv6, bytelen); | |
957 | } | |
fa713d9e | 958 | |
d62a17ae | 959 | if (IS_ZEBRA_DEBUG_KERNEL) |
960 | zlog_debug( | |
961 | "netlink_route_multipath() (%s): " | |
962 | "nexthop via %s %s if %u", | |
963 | routedesc, inet6_ntoa(nexthop->gate.ipv6), | |
964 | label_buf, nexthop->ifindex); | |
965 | } | |
5e210522 DS |
966 | |
967 | /* | |
968 | * We have the ifindex so we should always send it | |
969 | * This is especially useful if we are doing route | |
970 | * leaking. | |
971 | */ | |
972 | if (nexthop->type != NEXTHOP_TYPE_BLACKHOLE) | |
d62a17ae | 973 | addattr32(nlmsg, req_size, RTA_OIF, nexthop->ifindex); |
974 | ||
5e210522 DS |
975 | if (nexthop->type == NEXTHOP_TYPE_IFINDEX |
976 | || nexthop->type == NEXTHOP_TYPE_IPV4_IFINDEX) { | |
d62a17ae | 977 | if (cmd == RTM_NEWROUTE) { |
978 | if (nexthop->rmap_src.ipv4.s_addr) | |
979 | addattr_l(nlmsg, req_size, RTA_PREFSRC, | |
980 | &nexthop->rmap_src.ipv4, bytelen); | |
981 | else if (nexthop->src.ipv4.s_addr) | |
982 | addattr_l(nlmsg, req_size, RTA_PREFSRC, | |
983 | &nexthop->src.ipv4, bytelen); | |
984 | } | |
fa713d9e | 985 | |
d62a17ae | 986 | if (IS_ZEBRA_DEBUG_KERNEL) |
987 | zlog_debug( | |
988 | "netlink_route_multipath() (%s): " | |
989 | "nexthop via if %u", | |
990 | routedesc, nexthop->ifindex); | |
0aabccc0 DD |
991 | } |
992 | ||
d62a17ae | 993 | if (nexthop->type == NEXTHOP_TYPE_IPV6_IFINDEX) { |
d62a17ae | 994 | if (cmd == RTM_NEWROUTE) { |
995 | if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->rmap_src.ipv6)) | |
996 | addattr_l(nlmsg, req_size, RTA_PREFSRC, | |
997 | &nexthop->rmap_src.ipv6, bytelen); | |
998 | else if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->src.ipv6)) | |
999 | addattr_l(nlmsg, req_size, RTA_PREFSRC, | |
1000 | &nexthop->src.ipv6, bytelen); | |
1001 | } | |
1002 | ||
1003 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1004 | zlog_debug( | |
1005 | "netlink_route_multipath() (%s): " | |
1006 | "nexthop via if %u", | |
1007 | routedesc, nexthop->ifindex); | |
1008 | } | |
fa713d9e CF |
1009 | } |
1010 | ||
1011 | /* This function takes a nexthop as argument and | |
1012 | * appends to the given rtattr/rtnexthop pair the | |
1013 | * representation of the nexthop. If the nexthop | |
1014 | * defines a preferred source, the src parameter | |
1015 | * will be modified to point to that src, otherwise | |
1016 | * it will be kept unmodified. | |
1017 | * | |
1018 | * @param routedesc: Human readable description of route type | |
1019 | * (direct/recursive, single-/multipath) | |
1020 | * @param bytelen: Length of addresses in bytes. | |
1021 | * @param nexthop: Nexthop information | |
1022 | * @param rta: rtnetlink attribute structure | |
1023 | * @param rtnh: pointer to an rtnetlink nexthop structure | |
1024 | * @param src: pointer pointing to a location where | |
1025 | * the prefsrc should be stored. | |
1026 | */ | |
d62a17ae | 1027 | static void _netlink_route_build_multipath(const char *routedesc, int bytelen, |
1028 | struct nexthop *nexthop, | |
1029 | struct rtattr *rta, | |
1030 | struct rtnexthop *rtnh, | |
1031 | struct rtmsg *rtmsg, | |
1032 | union g_addr **src) | |
fa713d9e | 1033 | { |
8ecdb26e | 1034 | struct mpls_label_stack *nh_label; |
d62a17ae | 1035 | mpls_lse_t out_lse[MPLS_MAX_LABELS]; |
9a62e84b | 1036 | char label_buf[256]; |
d62a17ae | 1037 | |
1038 | rtnh->rtnh_len = sizeof(*rtnh); | |
1039 | rtnh->rtnh_flags = 0; | |
1040 | rtnh->rtnh_hops = 0; | |
1041 | rta->rta_len += rtnh->rtnh_len; | |
1042 | ||
1043 | /* | |
1044 | * label_buf is *only* currently used within debugging. | |
1045 | * As such when we assign it we are guarding it inside | |
1046 | * a debug test. If you want to change this make sure | |
1047 | * you fix this assumption | |
1048 | */ | |
1049 | label_buf[0] = '\0'; | |
1050 | /* outgoing label - either as NEWDST (in the case of LSR) or as ENCAP | |
1051 | * (in the case of LER) | |
1052 | */ | |
1053 | nh_label = nexthop->nh_label; | |
1054 | if (rtmsg->rtm_family == AF_MPLS) { | |
1055 | assert(nh_label); | |
1056 | assert(nh_label->num_labels == 1); | |
1057 | } | |
1058 | ||
1059 | if (nh_label && nh_label->num_labels) { | |
1060 | int i, num_labels = 0; | |
1061 | u_int32_t bos; | |
1062 | char label_buf1[20]; | |
1063 | ||
1064 | for (i = 0; i < nh_label->num_labels; i++) { | |
1065 | if (nh_label->label[i] != MPLS_IMP_NULL_LABEL) { | |
1066 | bos = ((i == (nh_label->num_labels - 1)) ? 1 | |
1067 | : 0); | |
1068 | out_lse[i] = mpls_lse_encode(nh_label->label[i], | |
1069 | 0, 0, bos); | |
1070 | if (IS_ZEBRA_DEBUG_KERNEL) { | |
1071 | if (!num_labels) | |
9a62e84b | 1072 | sprintf(label_buf, "label %u", |
d62a17ae | 1073 | nh_label->label[i]); |
1074 | else { | |
9a62e84b | 1075 | sprintf(label_buf1, "/%u", |
d62a17ae | 1076 | nh_label->label[i]); |
9a62e84b RW |
1077 | strlcat(label_buf, label_buf1, |
1078 | sizeof(label_buf)); | |
d62a17ae | 1079 | } |
1080 | } | |
1081 | num_labels++; | |
1082 | } | |
1083 | } | |
1084 | if (num_labels) { | |
1085 | if (rtmsg->rtm_family == AF_MPLS) { | |
1086 | rta_addattr_l(rta, NL_PKT_BUF_SIZE, RTA_NEWDST, | |
1087 | &out_lse, | |
1088 | num_labels * sizeof(mpls_lse_t)); | |
1089 | rtnh->rtnh_len += RTA_LENGTH( | |
1090 | num_labels * sizeof(mpls_lse_t)); | |
1091 | } else { | |
1092 | struct rtattr *nest; | |
1093 | u_int16_t encap = LWTUNNEL_ENCAP_MPLS; | |
1094 | int len = rta->rta_len; | |
1095 | ||
1096 | rta_addattr_l(rta, NL_PKT_BUF_SIZE, | |
1097 | RTA_ENCAP_TYPE, &encap, | |
1098 | sizeof(u_int16_t)); | |
1099 | nest = rta_nest(rta, NL_PKT_BUF_SIZE, | |
1100 | RTA_ENCAP); | |
1101 | rta_addattr_l(rta, NL_PKT_BUF_SIZE, | |
1102 | MPLS_IPTUNNEL_DST, &out_lse, | |
1103 | num_labels * sizeof(mpls_lse_t)); | |
1104 | rta_nest_end(rta, nest); | |
1105 | rtnh->rtnh_len += rta->rta_len - len; | |
1106 | } | |
66d42727 | 1107 | } |
d62a17ae | 1108 | } |
1109 | ||
1110 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ONLINK)) | |
1111 | rtnh->rtnh_flags |= RTNH_F_ONLINK; | |
1112 | ||
1113 | if (rtmsg->rtm_family == AF_INET | |
1114 | && (nexthop->type == NEXTHOP_TYPE_IPV6 | |
1115 | || nexthop->type == NEXTHOP_TYPE_IPV6_IFINDEX)) { | |
1116 | bytelen = 4; | |
1117 | rtnh->rtnh_flags |= RTNH_F_ONLINK; | |
1118 | rta_addattr_l(rta, NL_PKT_BUF_SIZE, RTA_GATEWAY, &ipv4_ll, | |
1119 | bytelen); | |
1120 | rtnh->rtnh_len += sizeof(struct rtattr) + bytelen; | |
1121 | rtnh->rtnh_ifindex = nexthop->ifindex; | |
1122 | ||
1123 | if (nexthop->rmap_src.ipv4.s_addr) | |
1124 | *src = &nexthop->rmap_src; | |
1125 | else if (nexthop->src.ipv4.s_addr) | |
1126 | *src = &nexthop->src; | |
1127 | ||
1128 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1129 | zlog_debug( | |
1130 | " 5549: netlink_route_build_multipath() (%s): " | |
1131 | "nexthop via %s %s if %u", | |
1132 | routedesc, ipv4_ll_buf, label_buf, | |
1133 | nexthop->ifindex); | |
1134 | return; | |
1135 | } | |
1136 | ||
1137 | if (nexthop->type == NEXTHOP_TYPE_IPV4 | |
1138 | || nexthop->type == NEXTHOP_TYPE_IPV4_IFINDEX) { | |
1139 | _netlink_route_rta_add_gateway_info(rtmsg->rtm_family, AF_INET, | |
1140 | rta, rtnh, NL_PKT_BUF_SIZE, | |
1141 | bytelen, nexthop); | |
1142 | if (nexthop->rmap_src.ipv4.s_addr) | |
1143 | *src = &nexthop->rmap_src; | |
1144 | else if (nexthop->src.ipv4.s_addr) | |
1145 | *src = &nexthop->src; | |
1146 | ||
1147 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1148 | zlog_debug( | |
1149 | "netlink_route_multipath() (%s): " | |
1150 | "nexthop via %s %s if %u", | |
1151 | routedesc, inet_ntoa(nexthop->gate.ipv4), | |
1152 | label_buf, nexthop->ifindex); | |
1153 | } | |
1154 | if (nexthop->type == NEXTHOP_TYPE_IPV6 | |
1155 | || nexthop->type == NEXTHOP_TYPE_IPV6_IFINDEX) { | |
1156 | _netlink_route_rta_add_gateway_info(rtmsg->rtm_family, AF_INET6, | |
1157 | rta, rtnh, NL_PKT_BUF_SIZE, | |
1158 | bytelen, nexthop); | |
1159 | ||
1160 | if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->rmap_src.ipv6)) | |
1161 | *src = &nexthop->rmap_src; | |
1162 | else if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->src.ipv6)) | |
1163 | *src = &nexthop->src; | |
1164 | ||
1165 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1166 | zlog_debug( | |
1167 | "netlink_route_multipath() (%s): " | |
1168 | "nexthop via %s %s if %u", | |
1169 | routedesc, inet6_ntoa(nexthop->gate.ipv6), | |
1170 | label_buf, nexthop->ifindex); | |
1171 | } | |
5e210522 DS |
1172 | |
1173 | /* | |
1174 | * We have figured out the ifindex so we should always send it | |
1175 | * This is especially useful if we are doing route | |
1176 | * leaking. | |
1177 | */ | |
1178 | if (nexthop->type != NEXTHOP_TYPE_BLACKHOLE) | |
1179 | rtnh->rtnh_ifindex = nexthop->ifindex; | |
1180 | ||
d62a17ae | 1181 | /* ifindex */ |
1182 | if (nexthop->type == NEXTHOP_TYPE_IPV4_IFINDEX | |
1183 | || nexthop->type == NEXTHOP_TYPE_IFINDEX) { | |
d62a17ae | 1184 | if (nexthop->rmap_src.ipv4.s_addr) |
1185 | *src = &nexthop->rmap_src; | |
1186 | else if (nexthop->src.ipv4.s_addr) | |
1187 | *src = &nexthop->src; | |
1188 | ||
1189 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1190 | zlog_debug( | |
1191 | "netlink_route_multipath() (%s): " | |
1192 | "nexthop via if %u", | |
1193 | routedesc, nexthop->ifindex); | |
1194 | } else if (nexthop->type == NEXTHOP_TYPE_IPV6_IFINDEX) { | |
d62a17ae | 1195 | if (IS_ZEBRA_DEBUG_KERNEL) |
1196 | zlog_debug( | |
1197 | "netlink_route_multipath() (%s): " | |
1198 | "nexthop via if %u", | |
1199 | routedesc, nexthop->ifindex); | |
1200 | } else { | |
1201 | rtnh->rtnh_ifindex = 0; | |
1202 | } | |
fa713d9e CF |
1203 | } |
1204 | ||
d62a17ae | 1205 | static inline void _netlink_mpls_build_singlepath(const char *routedesc, |
1206 | zebra_nhlfe_t *nhlfe, | |
1207 | struct nlmsghdr *nlmsg, | |
1208 | struct rtmsg *rtmsg, | |
1209 | size_t req_size, int cmd) | |
40c7bdb0 | 1210 | { |
d62a17ae | 1211 | int bytelen; |
1212 | u_char family; | |
40c7bdb0 | 1213 | |
d62a17ae | 1214 | family = NHLFE_FAMILY(nhlfe); |
1215 | bytelen = (family == AF_INET ? 4 : 16); | |
1216 | _netlink_route_build_singlepath(routedesc, bytelen, nhlfe->nexthop, | |
1217 | nlmsg, rtmsg, req_size, cmd); | |
40c7bdb0 | 1218 | } |
1219 | ||
1220 | ||
1221 | static inline void | |
d62a17ae | 1222 | _netlink_mpls_build_multipath(const char *routedesc, zebra_nhlfe_t *nhlfe, |
1223 | struct rtattr *rta, struct rtnexthop *rtnh, | |
1224 | struct rtmsg *rtmsg, union g_addr **src) | |
40c7bdb0 | 1225 | { |
d62a17ae | 1226 | int bytelen; |
1227 | u_char family; | |
40c7bdb0 | 1228 | |
d62a17ae | 1229 | family = NHLFE_FAMILY(nhlfe); |
1230 | bytelen = (family == AF_INET ? 4 : 16); | |
1231 | _netlink_route_build_multipath(routedesc, bytelen, nhlfe->nexthop, rta, | |
1232 | rtnh, rtmsg, src); | |
40c7bdb0 | 1233 | } |
1234 | ||
1235 | ||
fa713d9e CF |
1236 | /* Log debug information for netlink_route_multipath |
1237 | * if debug logging is enabled. | |
1238 | * | |
1239 | * @param cmd: Netlink command which is to be processed | |
1240 | * @param p: Prefix for which the change is due | |
1241 | * @param nexthop: Nexthop which is currently processed | |
1242 | * @param routedesc: Semantic annotation for nexthop | |
1243 | * (recursive, multipath, etc.) | |
1244 | * @param family: Address family which the change concerns | |
1245 | */ | |
d62a17ae | 1246 | static void _netlink_route_debug(int cmd, struct prefix *p, |
1247 | struct nexthop *nexthop, const char *routedesc, | |
1248 | int family, struct zebra_vrf *zvrf) | |
fa713d9e | 1249 | { |
d62a17ae | 1250 | if (IS_ZEBRA_DEBUG_KERNEL) { |
1251 | char buf[PREFIX_STRLEN]; | |
1252 | zlog_debug( | |
1253 | "netlink_route_multipath() (%s): %s %s vrf %u type %s", | |
1254 | routedesc, nl_msg_type_to_str(cmd), | |
1255 | prefix2str(p, buf, sizeof(buf)), zvrf_id(zvrf), | |
1256 | (nexthop) ? nexthop_type_to_str(nexthop->type) : "UNK"); | |
1257 | } | |
1258 | } | |
1259 | ||
1260 | static void _netlink_mpls_debug(int cmd, u_int32_t label, const char *routedesc) | |
40c7bdb0 | 1261 | { |
d62a17ae | 1262 | if (IS_ZEBRA_DEBUG_KERNEL) |
1263 | zlog_debug("netlink_mpls_multipath() (%s): %s %u/20", routedesc, | |
1264 | nl_msg_type_to_str(cmd), label); | |
fa713d9e CF |
1265 | } |
1266 | ||
d62a17ae | 1267 | static int netlink_neigh_update(int cmd, int ifindex, uint32_t addr, char *lla, |
1268 | int llalen) | |
5c610faf | 1269 | { |
d62a17ae | 1270 | struct { |
1271 | struct nlmsghdr n; | |
1272 | struct ndmsg ndm; | |
1273 | char buf[256]; | |
1274 | } req; | |
5c610faf | 1275 | |
d62a17ae | 1276 | struct zebra_ns *zns = zebra_ns_lookup(NS_DEFAULT); |
8f7d9fc0 | 1277 | |
d62a17ae | 1278 | memset(&req.n, 0, sizeof(req.n)); |
1279 | memset(&req.ndm, 0, sizeof(req.ndm)); | |
5c610faf | 1280 | |
d62a17ae | 1281 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)); |
1282 | req.n.nlmsg_flags = NLM_F_CREATE | NLM_F_REQUEST; | |
1283 | req.n.nlmsg_type = cmd; // RTM_NEWNEIGH or RTM_DELNEIGH | |
1284 | req.n.nlmsg_pid = zns->netlink_cmd.snl.nl_pid; | |
a55ba23f | 1285 | |
d62a17ae | 1286 | req.ndm.ndm_family = AF_INET; |
1287 | req.ndm.ndm_state = NUD_PERMANENT; | |
1288 | req.ndm.ndm_ifindex = ifindex; | |
1289 | req.ndm.ndm_type = RTN_UNICAST; | |
5c610faf | 1290 | |
d62a17ae | 1291 | addattr_l(&req.n, sizeof(req), NDA_DST, &addr, 4); |
1292 | addattr_l(&req.n, sizeof(req), NDA_LLADDR, lla, llalen); | |
5c610faf | 1293 | |
d62a17ae | 1294 | return netlink_talk(netlink_talk_filter, &req.n, &zns->netlink_cmd, zns, |
1295 | 0); | |
5c610faf DS |
1296 | } |
1297 | ||
718e3744 | 1298 | /* Routing table change via netlink interface. */ |
6ae24471 | 1299 | /* Update flag indicates whether this is a "replace" or not. */ |
d62a17ae | 1300 | static int netlink_route_multipath(int cmd, struct prefix *p, |
1301 | struct prefix *src_p, struct route_entry *re, | |
1302 | int update) | |
718e3744 | 1303 | { |
d62a17ae | 1304 | int bytelen; |
1305 | struct sockaddr_nl snl; | |
1306 | struct nexthop *nexthop = NULL; | |
1307 | unsigned int nexthop_num; | |
a8309422 | 1308 | int discard = 0; |
d62a17ae | 1309 | int family = PREFIX_FAMILY(p); |
1310 | const char *routedesc; | |
1311 | int setsrc = 0; | |
1312 | union g_addr src; | |
1313 | ||
1314 | struct { | |
1315 | struct nlmsghdr n; | |
1316 | struct rtmsg r; | |
1317 | char buf[NL_PKT_BUF_SIZE]; | |
1318 | } req; | |
1319 | ||
1320 | struct zebra_ns *zns = zebra_ns_lookup(NS_DEFAULT); | |
1321 | struct zebra_vrf *zvrf = vrf_info_lookup(re->vrf_id); | |
1322 | ||
1323 | memset(&req, 0, sizeof req - NL_PKT_BUF_SIZE); | |
1324 | ||
1325 | bytelen = (family == AF_INET ? 4 : 16); | |
1326 | ||
1327 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)); | |
1328 | req.n.nlmsg_flags = NLM_F_CREATE | NLM_F_REQUEST; | |
1329 | if ((cmd == RTM_NEWROUTE) && update) | |
1330 | req.n.nlmsg_flags |= NLM_F_REPLACE; | |
1331 | req.n.nlmsg_type = cmd; | |
1332 | req.n.nlmsg_pid = zns->netlink_cmd.snl.nl_pid; | |
1333 | ||
1334 | req.r.rtm_family = family; | |
1335 | req.r.rtm_dst_len = p->prefixlen; | |
1336 | req.r.rtm_src_len = src_p ? src_p->prefixlen : 0; | |
915902cb | 1337 | req.r.rtm_protocol = zebra2proto(re->type); |
d62a17ae | 1338 | req.r.rtm_scope = RT_SCOPE_UNIVERSE; |
a8309422 | 1339 | req.r.rtm_type = RTN_UNICAST; |
d62a17ae | 1340 | |
d62a17ae | 1341 | addattr_l(&req.n, sizeof req, RTA_DST, &p->u.prefix, bytelen); |
1342 | if (src_p) | |
1343 | addattr_l(&req.n, sizeof req, RTA_SRC, &src_p->u.prefix, | |
1344 | bytelen); | |
1345 | ||
1346 | /* Metric. */ | |
1347 | /* Hardcode the metric for all routes coming from zebra. Metric isn't | |
1348 | * used | |
1349 | * either by the kernel or by zebra. Its purely for calculating best | |
1350 | * path(s) | |
1351 | * by the routing protocol and for communicating with protocol peers. | |
1352 | */ | |
1353 | addattr32(&req.n, sizeof req, RTA_PRIORITY, NL_DEFAULT_ROUTE_METRIC); | |
4e40b6d6 KK |
1354 | #if defined(SUPPORT_REALMS) |
1355 | if (re->tag > 0 && re->tag <= 255) | |
1356 | addattr32(&req.n, sizeof req, RTA_FLOW, re->tag); | |
1357 | #endif | |
d62a17ae | 1358 | /* Table corresponding to this route. */ |
1359 | if (re->table < 256) | |
1360 | req.r.rtm_table = re->table; | |
1361 | else { | |
1362 | req.r.rtm_table = RT_TABLE_UNSPEC; | |
1363 | addattr32(&req.n, sizeof req, RTA_TABLE, re->table); | |
0aabccc0 | 1364 | } |
718e3744 | 1365 | |
a8309422 DL |
1366 | if (discard) |
1367 | goto skip; | |
1368 | ||
d62a17ae | 1369 | if (re->mtu || re->nexthop_mtu) { |
1370 | char buf[NL_PKT_BUF_SIZE]; | |
1371 | struct rtattr *rta = (void *)buf; | |
1372 | u_int32_t mtu = re->mtu; | |
1373 | if (!mtu || (re->nexthop_mtu && re->nexthop_mtu < mtu)) | |
1374 | mtu = re->nexthop_mtu; | |
1375 | rta->rta_type = RTA_METRICS; | |
1376 | rta->rta_len = RTA_LENGTH(0); | |
1377 | rta_addattr_l(rta, NL_PKT_BUF_SIZE, RTAX_MTU, &mtu, sizeof mtu); | |
1378 | addattr_l(&req.n, NL_PKT_BUF_SIZE, RTA_METRICS, RTA_DATA(rta), | |
1379 | RTA_PAYLOAD(rta)); | |
1380 | } | |
1381 | ||
d62a17ae | 1382 | /* Count overall nexthops so we can decide whether to use singlepath |
1383 | * or multipath case. */ | |
1384 | nexthop_num = 0; | |
1385 | for (ALL_NEXTHOPS(re->nexthop, nexthop)) { | |
1386 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_RECURSIVE)) | |
1387 | continue; | |
1388 | if (cmd == RTM_NEWROUTE | |
25b9cb0c | 1389 | && !NEXTHOP_IS_ACTIVE(nexthop->flags)) |
d62a17ae | 1390 | continue; |
1391 | if (cmd == RTM_DELROUTE | |
1392 | && !CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB)) | |
1393 | continue; | |
1394 | ||
1395 | nexthop_num++; | |
1396 | } | |
1397 | ||
1398 | /* Singlepath case. */ | |
1399 | if (nexthop_num == 1 || multipath_num == 1) { | |
1400 | nexthop_num = 0; | |
1401 | for (ALL_NEXTHOPS(re->nexthop, nexthop)) { | |
1f1d24a8 DS |
1402 | /* |
1403 | * So we want to cover 2 types of blackhole | |
1404 | * routes here: | |
1405 | * 1) A normal blackhole route( ala from a static | |
1406 | * install. | |
1407 | * 2) A recursively resolved blackhole route | |
1408 | */ | |
1409 | if (nexthop->type == NEXTHOP_TYPE_BLACKHOLE) { | |
1410 | switch (nexthop->bh_type) { | |
1411 | case BLACKHOLE_ADMINPROHIB: | |
1412 | req.r.rtm_type = RTN_PROHIBIT; | |
1413 | break; | |
1414 | case BLACKHOLE_REJECT: | |
1415 | req.r.rtm_type = RTN_UNREACHABLE; | |
1416 | break; | |
1417 | default: | |
1418 | req.r.rtm_type = RTN_BLACKHOLE; | |
1419 | break; | |
1420 | } | |
1421 | goto skip; | |
1422 | } | |
d62a17ae | 1423 | if (CHECK_FLAG(nexthop->flags, |
1424 | NEXTHOP_FLAG_RECURSIVE)) { | |
1425 | if (!setsrc) { | |
1426 | if (family == AF_INET) { | |
1427 | if (nexthop->rmap_src.ipv4 | |
1428 | .s_addr | |
1429 | != 0) { | |
1430 | src.ipv4 = | |
1431 | nexthop->rmap_src | |
1432 | .ipv4; | |
1433 | setsrc = 1; | |
1434 | } else if (nexthop->src.ipv4 | |
1435 | .s_addr | |
1436 | != 0) { | |
1437 | src.ipv4 = | |
1438 | nexthop->src | |
1439 | .ipv4; | |
1440 | setsrc = 1; | |
1441 | } | |
1442 | } else if (family == AF_INET6) { | |
1443 | if (!IN6_IS_ADDR_UNSPECIFIED( | |
1444 | &nexthop->rmap_src | |
1445 | .ipv6)) { | |
1446 | src.ipv6 = | |
1447 | nexthop->rmap_src | |
1448 | .ipv6; | |
1449 | setsrc = 1; | |
1450 | } else if ( | |
1451 | !IN6_IS_ADDR_UNSPECIFIED( | |
1452 | &nexthop->src | |
1453 | .ipv6)) { | |
1454 | src.ipv6 = | |
1455 | nexthop->src | |
1456 | .ipv6; | |
1457 | setsrc = 1; | |
1458 | } | |
1459 | } | |
1460 | } | |
1461 | continue; | |
1462 | } | |
1463 | ||
1464 | if ((cmd == RTM_NEWROUTE | |
25b9cb0c | 1465 | && NEXTHOP_IS_ACTIVE(nexthop->flags)) |
d62a17ae | 1466 | || (cmd == RTM_DELROUTE |
1467 | && CHECK_FLAG(nexthop->flags, | |
1468 | NEXTHOP_FLAG_FIB))) { | |
1469 | routedesc = nexthop->rparent | |
8b1450b9 RW |
1470 | ? "recursive, single-path" |
1471 | : "single-path"; | |
d62a17ae | 1472 | |
1473 | _netlink_route_debug(cmd, p, nexthop, routedesc, | |
1474 | family, zvrf); | |
1475 | _netlink_route_build_singlepath( | |
1476 | routedesc, bytelen, nexthop, &req.n, | |
1477 | &req.r, sizeof req, cmd); | |
1478 | nexthop_num++; | |
1479 | break; | |
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 | } | |
1490 | } else { | |
1491 | char buf[NL_PKT_BUF_SIZE]; | |
1492 | struct rtattr *rta = (void *)buf; | |
1493 | struct rtnexthop *rtnh; | |
1494 | union g_addr *src1 = NULL; | |
1495 | ||
1496 | rta->rta_type = RTA_MULTIPATH; | |
1497 | rta->rta_len = RTA_LENGTH(0); | |
1498 | rtnh = RTA_DATA(rta); | |
1499 | ||
1500 | nexthop_num = 0; | |
1501 | for (ALL_NEXTHOPS(re->nexthop, nexthop)) { | |
1502 | if (nexthop_num >= multipath_num) | |
1503 | break; | |
1504 | ||
1505 | if (CHECK_FLAG(nexthop->flags, | |
1506 | NEXTHOP_FLAG_RECURSIVE)) { | |
1507 | /* This only works for IPv4 now */ | |
1508 | if (!setsrc) { | |
1509 | if (family == AF_INET) { | |
1510 | if (nexthop->rmap_src.ipv4 | |
1511 | .s_addr | |
1512 | != 0) { | |
1513 | src.ipv4 = | |
1514 | nexthop->rmap_src | |
1515 | .ipv4; | |
1516 | setsrc = 1; | |
1517 | } else if (nexthop->src.ipv4 | |
1518 | .s_addr | |
1519 | != 0) { | |
1520 | src.ipv4 = | |
1521 | nexthop->src | |
1522 | .ipv4; | |
1523 | setsrc = 1; | |
1524 | } | |
1525 | } else if (family == AF_INET6) { | |
1526 | if (!IN6_IS_ADDR_UNSPECIFIED( | |
1527 | &nexthop->rmap_src | |
1528 | .ipv6)) { | |
1529 | src.ipv6 = | |
1530 | nexthop->rmap_src | |
1531 | .ipv6; | |
1532 | setsrc = 1; | |
1533 | } else if ( | |
1534 | !IN6_IS_ADDR_UNSPECIFIED( | |
1535 | &nexthop->src | |
1536 | .ipv6)) { | |
1537 | src.ipv6 = | |
1538 | nexthop->src | |
1539 | .ipv6; | |
1540 | setsrc = 1; | |
1541 | } | |
1542 | } | |
1543 | } | |
1544 | continue; | |
1545 | } | |
1546 | ||
1547 | if ((cmd == RTM_NEWROUTE | |
25b9cb0c | 1548 | && NEXTHOP_IS_ACTIVE(nexthop->flags)) |
d62a17ae | 1549 | || (cmd == RTM_DELROUTE |
1550 | && CHECK_FLAG(nexthop->flags, | |
1551 | NEXTHOP_FLAG_FIB))) { | |
1552 | routedesc = nexthop->rparent | |
8b1450b9 RW |
1553 | ? "recursive, multipath" |
1554 | : "multipath"; | |
d62a17ae | 1555 | nexthop_num++; |
1556 | ||
1557 | _netlink_route_debug(cmd, p, nexthop, routedesc, | |
1558 | family, zvrf); | |
1559 | _netlink_route_build_multipath( | |
1560 | routedesc, bytelen, nexthop, rta, rtnh, | |
1561 | &req.r, &src1); | |
1562 | rtnh = RTNH_NEXT(rtnh); | |
1563 | ||
1564 | if (!setsrc && src1) { | |
1565 | if (family == AF_INET) | |
1566 | src.ipv4 = src1->ipv4; | |
1567 | else if (family == AF_INET6) | |
1568 | src.ipv6 = src1->ipv6; | |
1569 | ||
1570 | setsrc = 1; | |
1571 | } | |
1572 | } | |
1573 | } | |
1574 | if (setsrc && (cmd == RTM_NEWROUTE)) { | |
1575 | if (family == AF_INET) | |
1576 | addattr_l(&req.n, sizeof req, RTA_PREFSRC, | |
1577 | &src.ipv4, bytelen); | |
1578 | else if (family == AF_INET6) | |
1579 | addattr_l(&req.n, sizeof req, RTA_PREFSRC, | |
1580 | &src.ipv6, bytelen); | |
1581 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1582 | zlog_debug("Setting source"); | |
1583 | } | |
1584 | ||
1585 | if (rta->rta_len > RTA_LENGTH(0)) | |
1586 | addattr_l(&req.n, NL_PKT_BUF_SIZE, RTA_MULTIPATH, | |
1587 | RTA_DATA(rta), RTA_PAYLOAD(rta)); | |
1588 | } | |
718e3744 | 1589 | |
d62a17ae | 1590 | /* If there is no useful nexthop then return. */ |
1591 | if (nexthop_num == 0) { | |
1592 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1593 | zlog_debug( | |
1594 | "netlink_route_multipath(): No useful nexthop."); | |
1595 | return 0; | |
1596 | } | |
718e3744 | 1597 | |
7021c425 | 1598 | skip: |
718e3744 | 1599 | |
d62a17ae | 1600 | /* Destination netlink address. */ |
1601 | memset(&snl, 0, sizeof snl); | |
1602 | snl.nl_family = AF_NETLINK; | |
718e3744 | 1603 | |
d62a17ae | 1604 | /* Talk to netlink socket. */ |
1605 | return netlink_talk(netlink_talk_filter, &req.n, &zns->netlink_cmd, zns, | |
1606 | 0); | |
718e3744 | 1607 | } |
1608 | ||
43b5cc5e | 1609 | int kernel_get_ipmr_sg_stats(struct zebra_vrf *zvrf, void *in) |
e3be0432 | 1610 | { |
d62a17ae | 1611 | int suc = 0; |
1612 | struct mcast_route_data *mr = (struct mcast_route_data *)in; | |
bd8b9272 DS |
1613 | struct { |
1614 | struct nlmsghdr n; | |
1615 | struct ndmsg ndm; | |
1616 | char buf[256]; | |
1617 | } req; | |
e3be0432 | 1618 | |
d62a17ae | 1619 | mroute = mr; |
bd8b9272 DS |
1620 | struct zebra_ns *zns = zebra_ns_lookup(NS_DEFAULT); |
1621 | ||
1622 | memset(&req.n, 0, sizeof(req.n)); | |
1623 | memset(&req.ndm, 0, sizeof(req.ndm)); | |
1624 | ||
1625 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)); | |
1626 | req.n.nlmsg_flags = NLM_F_REQUEST; | |
1627 | req.n.nlmsg_pid = zns->netlink_cmd.snl.nl_pid; | |
1628 | ||
1629 | req.ndm.ndm_family = RTNL_FAMILY_IPMR; | |
1630 | req.n.nlmsg_type = RTM_GETROUTE; | |
1631 | ||
1632 | addattr_l(&req.n, sizeof(req), RTA_IIF, &mroute->ifindex, 4); | |
1633 | addattr_l(&req.n, sizeof(req), RTA_OIF, &mroute->ifindex, 4); | |
1634 | addattr_l(&req.n, sizeof(req), RTA_SRC, &mroute->sg.src.s_addr, 4); | |
1635 | addattr_l(&req.n, sizeof(req), RTA_DST, &mroute->sg.grp.s_addr, 4); | |
1636 | addattr_l(&req.n, sizeof(req), RTA_TABLE, &zvrf->table_id, 4); | |
e3be0432 | 1637 | |
bd8b9272 DS |
1638 | suc = netlink_talk(netlink_route_change_read_multicast, &req.n, |
1639 | &zns->netlink_cmd, zns, 0); | |
e3be0432 | 1640 | |
bd8b9272 | 1641 | mroute = NULL; |
d62a17ae | 1642 | return suc; |
e3be0432 DS |
1643 | } |
1644 | ||
0c555cc6 DS |
1645 | void kernel_route_rib(struct prefix *p, struct prefix *src_p, |
1646 | struct route_entry *old, struct route_entry *new) | |
718e3744 | 1647 | { |
0c555cc6 DS |
1648 | int ret = 0; |
1649 | ||
0af35d90 RW |
1650 | assert(old || new); |
1651 | ||
0c555cc6 DS |
1652 | if (new) { |
1653 | if (p->family == AF_INET) | |
1654 | ret = netlink_route_multipath(RTM_NEWROUTE, p, src_p, | |
1655 | new, (old) ? 1 : 0); | |
1656 | else { | |
1657 | /* | |
1658 | * So v6 route replace semantics are not in | |
1659 | * the kernel at this point as I understand it. | |
1660 | * So let's do a delete than an add. | |
1661 | * In the future once v6 route replace semantics | |
1662 | * are in we can figure out what to do here to | |
1663 | * allow working with old and new kernels. | |
1664 | * | |
1665 | * I'm also intentionally ignoring the failure case | |
1666 | * of the route delete. If that happens yeah we're | |
1667 | * screwed. | |
1668 | */ | |
1669 | if (old) | |
1670 | netlink_route_multipath(RTM_DELROUTE, p, | |
1671 | src_p, old, 0); | |
1672 | ret = netlink_route_multipath(RTM_NEWROUTE, p, | |
1673 | src_p, new, 0); | |
1674 | } | |
1675 | kernel_route_rib_pass_fail(p, new, | |
1676 | (!ret) ? | |
1677 | SOUTHBOUND_INSTALL_SUCCESS : | |
1678 | SOUTHBOUND_INSTALL_FAILURE); | |
1679 | return; | |
1680 | } | |
718e3744 | 1681 | |
0c555cc6 DS |
1682 | if (old) { |
1683 | ret = netlink_route_multipath(RTM_DELROUTE, p, src_p, old, 0); | |
e7fcb843 | 1684 | |
0c555cc6 DS |
1685 | kernel_route_rib_pass_fail(p, old, |
1686 | (!ret) ? | |
1687 | SOUTHBOUND_DELETE_SUCCESS : | |
1688 | SOUTHBOUND_DELETE_FAILURE); | |
1689 | } | |
718e3744 | 1690 | } |
1691 | ||
d62a17ae | 1692 | int kernel_neigh_update(int add, int ifindex, uint32_t addr, char *lla, |
1693 | int llalen) | |
6b8a5694 | 1694 | { |
d62a17ae | 1695 | return netlink_neigh_update(add ? RTM_NEWNEIGH : RTM_DELNEIGH, ifindex, |
1696 | addr, lla, llalen); | |
6b8a5694 | 1697 | } |
718e3744 | 1698 | |
13d60d35 | 1699 | /* |
1700 | * Add remote VTEP to the flood list for this VxLAN interface (VNI). This | |
1701 | * is done by adding an FDB entry with a MAC of 00:00:00:00:00:00. | |
1702 | */ | |
d62a17ae | 1703 | static int netlink_vxlan_flood_list_update(struct interface *ifp, |
1704 | struct in_addr *vtep_ip, int cmd) | |
13d60d35 | 1705 | { |
d62a17ae | 1706 | struct zebra_ns *zns = zebra_ns_lookup(NS_DEFAULT); |
1707 | struct { | |
1708 | struct nlmsghdr n; | |
1709 | struct ndmsg ndm; | |
1710 | char buf[256]; | |
1711 | } req; | |
1712 | u_char dst_mac[6] = {0x0, 0x0, 0x0, 0x0, 0x0, 0x0}; | |
1713 | ||
1714 | memset(&req.n, 0, sizeof(req.n)); | |
1715 | memset(&req.ndm, 0, sizeof(req.ndm)); | |
1716 | ||
1717 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)); | |
1718 | req.n.nlmsg_flags = NLM_F_REQUEST; | |
1719 | if (cmd == RTM_NEWNEIGH) | |
1720 | req.n.nlmsg_flags |= (NLM_F_CREATE | NLM_F_APPEND); | |
1721 | req.n.nlmsg_type = cmd; | |
1722 | req.ndm.ndm_family = PF_BRIDGE; | |
1723 | req.ndm.ndm_state = NUD_NOARP | NUD_PERMANENT; | |
1724 | req.ndm.ndm_flags |= NTF_SELF; // Handle by "self", not "master" | |
1725 | ||
1726 | ||
1727 | addattr_l(&req.n, sizeof(req), NDA_LLADDR, &dst_mac, 6); | |
1728 | req.ndm.ndm_ifindex = ifp->ifindex; | |
1729 | addattr_l(&req.n, sizeof(req), NDA_DST, &vtep_ip->s_addr, 4); | |
1730 | ||
1731 | return netlink_talk(netlink_talk_filter, &req.n, &zns->netlink_cmd, zns, | |
1732 | 0); | |
13d60d35 | 1733 | } |
1734 | ||
1735 | /* | |
d62a17ae | 1736 | * Add remote VTEP for this VxLAN interface (VNI). In Linux, this involves |
1737 | * adding | |
13d60d35 | 1738 | * a "flood" MAC FDB entry. |
1739 | */ | |
d62a17ae | 1740 | int kernel_add_vtep(vni_t vni, struct interface *ifp, struct in_addr *vtep_ip) |
13d60d35 | 1741 | { |
d62a17ae | 1742 | if (IS_ZEBRA_DEBUG_VXLAN) |
1743 | zlog_debug("Install %s into flood list for VNI %u intf %s(%u)", | |
1744 | inet_ntoa(*vtep_ip), vni, ifp->name, ifp->ifindex); | |
13d60d35 | 1745 | |
d62a17ae | 1746 | return netlink_vxlan_flood_list_update(ifp, vtep_ip, RTM_NEWNEIGH); |
13d60d35 | 1747 | } |
1748 | ||
1749 | /* | |
1750 | * Remove remote VTEP for this VxLAN interface (VNI). In Linux, this involves | |
1751 | * deleting the "flood" MAC FDB entry. | |
1752 | */ | |
d62a17ae | 1753 | int kernel_del_vtep(vni_t vni, struct interface *ifp, struct in_addr *vtep_ip) |
13d60d35 | 1754 | { |
d62a17ae | 1755 | if (IS_ZEBRA_DEBUG_VXLAN) |
1756 | zlog_debug( | |
1757 | "Uninstall %s from flood list for VNI %u intf %s(%u)", | |
1758 | inet_ntoa(*vtep_ip), vni, ifp->name, ifp->ifindex); | |
13d60d35 | 1759 | |
d62a17ae | 1760 | return netlink_vxlan_flood_list_update(ifp, vtep_ip, RTM_DELNEIGH); |
13d60d35 | 1761 | } |
1762 | ||
2232a77c | 1763 | #ifndef NDA_RTA |
d62a17ae | 1764 | #define NDA_RTA(r) \ |
1765 | ((struct rtattr *)(((char *)(r)) + NLMSG_ALIGN(sizeof(struct ndmsg)))) | |
2232a77c | 1766 | #endif |
1767 | ||
d62a17ae | 1768 | static int netlink_macfdb_change(struct sockaddr_nl *snl, struct nlmsghdr *h, |
1769 | int len) | |
2232a77c | 1770 | { |
d62a17ae | 1771 | struct ndmsg *ndm; |
1772 | struct interface *ifp; | |
1773 | struct zebra_if *zif; | |
d62a17ae | 1774 | struct rtattr *tb[NDA_MAX + 1]; |
1775 | struct interface *br_if; | |
1776 | struct ethaddr mac; | |
1777 | vlanid_t vid = 0; | |
1778 | struct prefix vtep_ip; | |
1779 | int vid_present = 0, dst_present = 0; | |
1780 | char buf[ETHER_ADDR_STRLEN]; | |
1781 | char vid_buf[20]; | |
1782 | char dst_buf[30]; | |
1783 | u_char sticky = 0; | |
1784 | ||
1785 | ndm = NLMSG_DATA(h); | |
1786 | ||
2853fed6 | 1787 | /* We only process macfdb notifications if EVPN is enabled */ |
1788 | if (!is_evpn_enabled()) | |
1789 | return 0; | |
1790 | ||
d62a17ae | 1791 | /* The interface should exist. */ |
1792 | ifp = if_lookup_by_index_per_ns(zebra_ns_lookup(NS_DEFAULT), | |
1793 | ndm->ndm_ifindex); | |
2853fed6 | 1794 | if (!ifp || !ifp->info) |
d62a17ae | 1795 | return 0; |
1796 | ||
1797 | /* The interface should be something we're interested in. */ | |
1798 | if (!IS_ZEBRA_IF_BRIDGE_SLAVE(ifp)) | |
1799 | return 0; | |
1800 | ||
1801 | /* Drop "permanent" entries. */ | |
1802 | if (ndm->ndm_state & NUD_PERMANENT) | |
1803 | return 0; | |
1804 | ||
1805 | zif = (struct zebra_if *)ifp->info; | |
1806 | if ((br_if = zif->brslave_info.br_if) == NULL) { | |
1807 | zlog_warn("%s family %s IF %s(%u) brIF %u - no bridge master", | |
1808 | nl_msg_type_to_str(h->nlmsg_type), | |
1809 | nl_family_to_str(ndm->ndm_family), ifp->name, | |
1810 | ndm->ndm_ifindex, zif->brslave_info.bridge_ifindex); | |
1811 | return 0; | |
1812 | } | |
1813 | ||
1814 | /* Parse attributes and extract fields of interest. */ | |
1815 | memset(tb, 0, sizeof tb); | |
1816 | netlink_parse_rtattr(tb, NDA_MAX, NDA_RTA(ndm), len); | |
1817 | ||
1818 | if (!tb[NDA_LLADDR]) { | |
1819 | zlog_warn("%s family %s IF %s(%u) brIF %u - no LLADDR", | |
1820 | nl_msg_type_to_str(h->nlmsg_type), | |
1821 | nl_family_to_str(ndm->ndm_family), ifp->name, | |
1822 | ndm->ndm_ifindex, zif->brslave_info.bridge_ifindex); | |
1823 | return 0; | |
1824 | } | |
1825 | ||
ff8b7eb8 | 1826 | if (RTA_PAYLOAD(tb[NDA_LLADDR]) != ETH_ALEN) { |
d62a17ae | 1827 | zlog_warn( |
df0b13cf | 1828 | "%s family %s IF %s(%u) brIF %u - LLADDR is not MAC, len %lu", |
d62a17ae | 1829 | nl_msg_type_to_str(h->nlmsg_type), |
1830 | nl_family_to_str(ndm->ndm_family), ifp->name, | |
1831 | ndm->ndm_ifindex, zif->brslave_info.bridge_ifindex, | |
df0b13cf | 1832 | (unsigned long)RTA_PAYLOAD(tb[NDA_LLADDR])); |
d62a17ae | 1833 | return 0; |
1834 | } | |
1835 | ||
ff8b7eb8 | 1836 | memcpy(&mac, RTA_DATA(tb[NDA_LLADDR]), ETH_ALEN); |
d62a17ae | 1837 | |
1838 | if ((NDA_VLAN <= NDA_MAX) && tb[NDA_VLAN]) { | |
1839 | vid_present = 1; | |
1840 | vid = *(u_int16_t *)RTA_DATA(tb[NDA_VLAN]); | |
1841 | sprintf(vid_buf, " VLAN %u", vid); | |
1842 | } | |
1843 | ||
1844 | if (tb[NDA_DST]) { | |
1845 | /* TODO: Only IPv4 supported now. */ | |
1846 | dst_present = 1; | |
1847 | vtep_ip.family = AF_INET; | |
1848 | vtep_ip.prefixlen = IPV4_MAX_BITLEN; | |
1849 | memcpy(&(vtep_ip.u.prefix4.s_addr), RTA_DATA(tb[NDA_DST]), | |
1850 | IPV4_MAX_BYTELEN); | |
1851 | sprintf(dst_buf, " dst %s", inet_ntoa(vtep_ip.u.prefix4)); | |
1852 | } | |
1853 | ||
1854 | sticky = (ndm->ndm_state & NUD_NOARP) ? 1 : 0; | |
1855 | ||
1856 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1857 | zlog_debug("Rx %s family %s IF %s(%u)%s %sMAC %s%s", | |
1858 | nl_msg_type_to_str(h->nlmsg_type), | |
1859 | nl_family_to_str(ndm->ndm_family), ifp->name, | |
1860 | ndm->ndm_ifindex, vid_present ? vid_buf : "", | |
1861 | sticky ? "sticky " : "", | |
1862 | prefix_mac2str(&mac, buf, sizeof(buf)), | |
1863 | dst_present ? dst_buf : ""); | |
1864 | ||
1865 | if (filter_vlan && vid != filter_vlan) | |
1866 | return 0; | |
1867 | ||
1868 | /* If add or update, do accordingly if learnt on a "local" interface; if | |
1869 | * the notification is over VxLAN, this has to be related to | |
1870 | * multi-homing, | |
1871 | * so perform an implicit delete of any local entry (if it exists). | |
1872 | */ | |
1873 | if (h->nlmsg_type == RTM_NEWNEIGH) { | |
1874 | /* Drop "permanent" entries. */ | |
1875 | if (ndm->ndm_state & NUD_PERMANENT) | |
1876 | return 0; | |
1877 | ||
1878 | if (IS_ZEBRA_IF_VXLAN(ifp)) | |
1879 | return zebra_vxlan_check_del_local_mac(ifp, br_if, &mac, | |
1880 | vid); | |
1881 | ||
1882 | return zebra_vxlan_local_mac_add_update(ifp, br_if, &mac, vid, | |
1883 | sticky); | |
1884 | } | |
1885 | ||
1886 | /* This is a delete notification. | |
1887 | * 1. For a MAC over VxLan, check if it needs to be refreshed(readded) | |
1888 | * 2. For a MAC over "local" interface, delete the mac | |
1889 | * Note: We will get notifications from both bridge driver and VxLAN | |
1890 | * driver. | |
1891 | * Ignore the notification from VxLan driver as it is also generated | |
1892 | * when mac moves from remote to local. | |
1893 | */ | |
1894 | if (dst_present) | |
1895 | return 0; | |
1896 | ||
1897 | if (IS_ZEBRA_IF_VXLAN(ifp)) | |
1898 | return zebra_vxlan_check_readd_remote_mac(ifp, br_if, &mac, | |
1899 | vid); | |
1900 | ||
1901 | return zebra_vxlan_local_mac_del(ifp, br_if, &mac, vid); | |
2232a77c | 1902 | } |
1903 | ||
d62a17ae | 1904 | static int netlink_macfdb_table(struct sockaddr_nl *snl, struct nlmsghdr *h, |
1905 | ns_id_t ns_id, int startup) | |
2232a77c | 1906 | { |
d62a17ae | 1907 | int len; |
1908 | struct ndmsg *ndm; | |
2232a77c | 1909 | |
d62a17ae | 1910 | if (h->nlmsg_type != RTM_NEWNEIGH) |
1911 | return 0; | |
2232a77c | 1912 | |
d62a17ae | 1913 | /* Length validity. */ |
1914 | len = h->nlmsg_len - NLMSG_LENGTH(sizeof(struct ndmsg)); | |
1915 | if (len < 0) | |
1916 | return -1; | |
2232a77c | 1917 | |
d62a17ae | 1918 | /* We are interested only in AF_BRIDGE notifications. */ |
1919 | ndm = NLMSG_DATA(h); | |
1920 | if (ndm->ndm_family != AF_BRIDGE) | |
1921 | return 0; | |
2232a77c | 1922 | |
d62a17ae | 1923 | return netlink_macfdb_change(snl, h, len); |
2232a77c | 1924 | } |
1925 | ||
1926 | /* Request for MAC FDB information from the kernel */ | |
d62a17ae | 1927 | static int netlink_request_macs(struct zebra_ns *zns, int family, int type, |
1928 | ifindex_t master_ifindex) | |
2232a77c | 1929 | { |
d62a17ae | 1930 | struct { |
1931 | struct nlmsghdr n; | |
1932 | struct ifinfomsg ifm; | |
1933 | char buf[256]; | |
1934 | } req; | |
1935 | ||
1936 | /* Form the request, specifying filter (rtattr) if needed. */ | |
1937 | memset(&req, 0, sizeof(req)); | |
1938 | req.n.nlmsg_type = type; | |
1939 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg)); | |
1940 | req.ifm.ifi_family = family; | |
1941 | if (master_ifindex) | |
1942 | addattr32(&req.n, sizeof(req), IFLA_MASTER, master_ifindex); | |
1943 | ||
1944 | return netlink_request(&zns->netlink_cmd, &req.n); | |
2232a77c | 1945 | } |
1946 | ||
1947 | /* | |
1948 | * MAC forwarding database read using netlink interface. This is invoked | |
1949 | * at startup. | |
1950 | */ | |
d62a17ae | 1951 | int netlink_macfdb_read(struct zebra_ns *zns) |
2232a77c | 1952 | { |
d62a17ae | 1953 | int ret; |
1954 | ||
1955 | /* Get bridge FDB table. */ | |
1956 | ret = netlink_request_macs(zns, AF_BRIDGE, RTM_GETNEIGH, 0); | |
1957 | if (ret < 0) | |
1958 | return ret; | |
1959 | /* We are reading entire table. */ | |
1960 | filter_vlan = 0; | |
1961 | ret = netlink_parse_info(netlink_macfdb_table, &zns->netlink_cmd, zns, | |
1962 | 0, 1); | |
1963 | ||
1964 | return ret; | |
2232a77c | 1965 | } |
1966 | ||
1967 | /* | |
1968 | * MAC forwarding database read using netlink interface. This is for a | |
1969 | * specific bridge and matching specific access VLAN (if VLAN-aware bridge). | |
1970 | */ | |
d62a17ae | 1971 | int netlink_macfdb_read_for_bridge(struct zebra_ns *zns, struct interface *ifp, |
1972 | struct interface *br_if) | |
2232a77c | 1973 | { |
d62a17ae | 1974 | struct zebra_if *br_zif; |
1975 | struct zebra_if *zif; | |
1976 | struct zebra_l2info_vxlan *vxl; | |
1977 | int ret = 0; | |
1978 | ||
1979 | ||
1980 | /* Save VLAN we're filtering on, if needed. */ | |
1981 | br_zif = (struct zebra_if *)br_if->info; | |
1982 | zif = (struct zebra_if *)ifp->info; | |
1983 | vxl = &zif->l2info.vxl; | |
1984 | if (IS_ZEBRA_IF_BRIDGE_VLAN_AWARE(br_zif)) | |
1985 | filter_vlan = vxl->access_vlan; | |
1986 | ||
1987 | /* Get bridge FDB table for specific bridge - we do the VLAN filtering. | |
1988 | */ | |
1989 | ret = netlink_request_macs(zns, AF_BRIDGE, RTM_GETNEIGH, | |
1990 | br_if->ifindex); | |
1991 | if (ret < 0) | |
1992 | return ret; | |
1993 | ret = netlink_parse_info(netlink_macfdb_table, &zns->netlink_cmd, zns, | |
1994 | 0, 0); | |
1995 | ||
1996 | /* Reset VLAN filter. */ | |
1997 | filter_vlan = 0; | |
1998 | return ret; | |
2232a77c | 1999 | } |
2000 | ||
d62a17ae | 2001 | static int netlink_macfdb_update(struct interface *ifp, vlanid_t vid, |
2002 | struct ethaddr *mac, struct in_addr vtep_ip, | |
2003 | int local, int cmd, u_char sticky) | |
2232a77c | 2004 | { |
d62a17ae | 2005 | struct zebra_ns *zns = zebra_ns_lookup(NS_DEFAULT); |
2006 | struct { | |
2007 | struct nlmsghdr n; | |
2008 | struct ndmsg ndm; | |
2009 | char buf[256]; | |
2010 | } req; | |
2011 | int dst_alen; | |
2012 | struct zebra_if *zif; | |
2013 | struct interface *br_if; | |
2014 | struct zebra_if *br_zif; | |
2015 | char buf[ETHER_ADDR_STRLEN]; | |
2016 | int vid_present = 0, dst_present = 0; | |
2017 | char vid_buf[20]; | |
2018 | char dst_buf[30]; | |
2019 | ||
2020 | zif = ifp->info; | |
2021 | if ((br_if = zif->brslave_info.br_if) == NULL) { | |
2022 | zlog_warn("MAC %s on IF %s(%u) - no mapping to bridge", | |
2023 | (cmd == RTM_NEWNEIGH) ? "add" : "del", ifp->name, | |
2024 | ifp->ifindex); | |
2025 | return -1; | |
2026 | } | |
2027 | ||
2028 | memset(&req.n, 0, sizeof(req.n)); | |
2029 | memset(&req.ndm, 0, sizeof(req.ndm)); | |
2030 | ||
2031 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)); | |
2032 | req.n.nlmsg_flags = NLM_F_REQUEST; | |
2033 | if (cmd == RTM_NEWNEIGH) | |
2034 | req.n.nlmsg_flags |= (NLM_F_CREATE | NLM_F_REPLACE); | |
2035 | req.n.nlmsg_type = cmd; | |
2036 | req.ndm.ndm_family = AF_BRIDGE; | |
2037 | req.ndm.ndm_flags |= NTF_SELF | NTF_MASTER; | |
2038 | req.ndm.ndm_state = NUD_REACHABLE; | |
2039 | ||
2040 | if (sticky) | |
2041 | req.ndm.ndm_state |= NUD_NOARP; | |
2042 | else | |
2043 | req.ndm.ndm_flags |= NTF_EXT_LEARNED; | |
2044 | ||
2045 | addattr_l(&req.n, sizeof(req), NDA_LLADDR, mac, 6); | |
2046 | req.ndm.ndm_ifindex = ifp->ifindex; | |
2047 | if (!local) { | |
2048 | dst_alen = 4; // TODO: hardcoded | |
2049 | addattr_l(&req.n, sizeof(req), NDA_DST, &vtep_ip, dst_alen); | |
2050 | dst_present = 1; | |
2051 | sprintf(dst_buf, " dst %s", inet_ntoa(vtep_ip)); | |
2052 | } | |
2053 | br_zif = (struct zebra_if *)br_if->info; | |
2054 | if (IS_ZEBRA_IF_BRIDGE_VLAN_AWARE(br_zif) && vid > 0) { | |
2055 | addattr16(&req.n, sizeof(req), NDA_VLAN, vid); | |
2056 | vid_present = 1; | |
2057 | sprintf(vid_buf, " VLAN %u", vid); | |
2058 | } | |
2059 | addattr32(&req.n, sizeof(req), NDA_MASTER, br_if->ifindex); | |
2060 | ||
2061 | if (IS_ZEBRA_DEBUG_KERNEL) | |
2062 | zlog_debug("Tx %s family %s IF %s(%u)%s %sMAC %s%s", | |
2063 | nl_msg_type_to_str(cmd), | |
2064 | nl_family_to_str(req.ndm.ndm_family), ifp->name, | |
2065 | ifp->ifindex, vid_present ? vid_buf : "", | |
2066 | sticky ? "sticky " : "", | |
2067 | prefix_mac2str(mac, buf, sizeof(buf)), | |
2068 | dst_present ? dst_buf : ""); | |
2069 | ||
2070 | return netlink_talk(netlink_talk_filter, &req.n, &zns->netlink_cmd, zns, | |
2071 | 0); | |
2232a77c | 2072 | } |
2073 | ||
d62a17ae | 2074 | #define NUD_VALID \ |
2075 | (NUD_PERMANENT | NUD_NOARP | NUD_REACHABLE | NUD_PROBE | NUD_STALE \ | |
2076 | | NUD_DELAY) | |
2232a77c | 2077 | |
d62a17ae | 2078 | static int netlink_ipneigh_change(struct sockaddr_nl *snl, struct nlmsghdr *h, |
2079 | int len) | |
2232a77c | 2080 | { |
d62a17ae | 2081 | struct ndmsg *ndm; |
2082 | struct interface *ifp; | |
2083 | struct zebra_if *zif; | |
d62a17ae | 2084 | struct rtattr *tb[NDA_MAX + 1]; |
2085 | struct interface *link_if; | |
2086 | struct ethaddr mac; | |
2087 | struct ipaddr ip; | |
2088 | char buf[ETHER_ADDR_STRLEN]; | |
2089 | char buf2[INET6_ADDRSTRLEN]; | |
2090 | int mac_present = 0; | |
2091 | u_char ext_learned; | |
2092 | ||
2093 | ndm = NLMSG_DATA(h); | |
2094 | ||
2853fed6 | 2095 | /* We only process neigh notifications if EVPN is enabled */ |
2096 | if (!is_evpn_enabled()) | |
2097 | return 0; | |
2098 | ||
d62a17ae | 2099 | /* The interface should exist. */ |
2100 | ifp = if_lookup_by_index_per_ns(zebra_ns_lookup(NS_DEFAULT), | |
2101 | ndm->ndm_ifindex); | |
2853fed6 | 2102 | if (!ifp || !ifp->info) |
d62a17ae | 2103 | return 0; |
2104 | ||
2105 | /* Drop "permanent" entries. */ | |
2106 | if (ndm->ndm_state & NUD_PERMANENT) | |
2107 | return 0; | |
2108 | ||
2109 | zif = (struct zebra_if *)ifp->info; | |
2110 | /* The neighbor is present on an SVI. From this, we locate the | |
2111 | * underlying | |
2112 | * bridge because we're only interested in neighbors on a VxLAN bridge. | |
2113 | * The bridge is located based on the nature of the SVI: | |
2114 | * (a) In the case of a VLAN-aware bridge, the SVI is a L3 VLAN | |
2115 | * interface | |
2116 | * and is linked to the bridge | |
2117 | * (b) In the case of a VLAN-unaware bridge, the SVI is the bridge | |
2118 | * inteface | |
2119 | * itself | |
2120 | */ | |
2121 | if (IS_ZEBRA_IF_VLAN(ifp)) { | |
71349e03 MK |
2122 | link_if = if_lookup_by_index_per_ns(zebra_ns_lookup(NS_DEFAULT), |
2123 | zif->link_ifindex); | |
d62a17ae | 2124 | if (!link_if) |
2125 | return 0; | |
2126 | } else if (IS_ZEBRA_IF_BRIDGE(ifp)) | |
2127 | link_if = ifp; | |
2128 | else | |
2129 | return 0; | |
2130 | ||
2131 | /* Parse attributes and extract fields of interest. */ | |
2132 | memset(tb, 0, sizeof tb); | |
2133 | netlink_parse_rtattr(tb, NDA_MAX, NDA_RTA(ndm), len); | |
2134 | ||
2135 | if (!tb[NDA_DST]) { | |
2136 | zlog_warn("%s family %s IF %s(%u) - no DST", | |
2137 | nl_msg_type_to_str(h->nlmsg_type), | |
2138 | nl_family_to_str(ndm->ndm_family), ifp->name, | |
2139 | ndm->ndm_ifindex); | |
2140 | return 0; | |
2141 | } | |
2142 | memset(&mac, 0, sizeof(struct ethaddr)); | |
2143 | memset(&ip, 0, sizeof(struct ipaddr)); | |
2144 | ip.ipa_type = (ndm->ndm_family == AF_INET) ? IPADDR_V4 : IPADDR_V6; | |
2145 | memcpy(&ip.ip.addr, RTA_DATA(tb[NDA_DST]), RTA_PAYLOAD(tb[NDA_DST])); | |
2146 | ||
2147 | if (h->nlmsg_type == RTM_NEWNEIGH) { | |
2148 | if (tb[NDA_LLADDR]) { | |
ff8b7eb8 | 2149 | if (RTA_PAYLOAD(tb[NDA_LLADDR]) != ETH_ALEN) { |
d62a17ae | 2150 | zlog_warn( |
df0b13cf | 2151 | "%s family %s IF %s(%u) - LLADDR is not MAC, len %lu", |
d62a17ae | 2152 | nl_msg_type_to_str(h->nlmsg_type), |
2153 | nl_family_to_str(ndm->ndm_family), | |
2154 | ifp->name, ndm->ndm_ifindex, | |
df0b13cf | 2155 | (unsigned long)RTA_PAYLOAD(tb[NDA_LLADDR])); |
d62a17ae | 2156 | return 0; |
2157 | } | |
2158 | ||
2159 | mac_present = 1; | |
ff8b7eb8 | 2160 | memcpy(&mac, RTA_DATA(tb[NDA_LLADDR]), ETH_ALEN); |
d62a17ae | 2161 | } |
2162 | ||
2163 | ext_learned = (ndm->ndm_flags & NTF_EXT_LEARNED) ? 1 : 0; | |
2164 | ||
2165 | if (IS_ZEBRA_DEBUG_KERNEL) | |
2166 | zlog_debug( | |
2167 | "Rx %s family %s IF %s(%u) IP %s MAC %s state 0x%x flags 0x%x", | |
2168 | nl_msg_type_to_str(h->nlmsg_type), | |
2169 | nl_family_to_str(ndm->ndm_family), ifp->name, | |
2170 | ndm->ndm_ifindex, | |
2171 | ipaddr2str(&ip, buf2, sizeof(buf2)), | |
2172 | mac_present | |
2173 | ? prefix_mac2str(&mac, buf, sizeof(buf)) | |
2174 | : "", | |
2175 | ndm->ndm_state, ndm->ndm_flags); | |
2176 | ||
2177 | /* If the neighbor state is valid for use, process as an add or | |
2178 | * update | |
2179 | * else process as a delete. Note that the delete handling may | |
2180 | * result | |
2181 | * in re-adding the neighbor if it is a valid "remote" neighbor. | |
2182 | */ | |
2183 | if (ndm->ndm_state & NUD_VALID) | |
2184 | return zebra_vxlan_local_neigh_add_update( | |
2185 | ifp, link_if, &ip, &mac, ndm->ndm_state, | |
2186 | ext_learned); | |
2187 | ||
2188 | return zebra_vxlan_local_neigh_del(ifp, link_if, &ip); | |
2189 | } | |
2190 | ||
2191 | if (IS_ZEBRA_DEBUG_KERNEL) | |
2192 | zlog_debug("Rx %s family %s IF %s(%u) IP %s", | |
2193 | nl_msg_type_to_str(h->nlmsg_type), | |
2194 | nl_family_to_str(ndm->ndm_family), ifp->name, | |
2195 | ndm->ndm_ifindex, | |
2196 | ipaddr2str(&ip, buf2, sizeof(buf2))); | |
2197 | ||
2198 | /* Process the delete - it may result in re-adding the neighbor if it is | |
2199 | * a valid "remote" neighbor. | |
2200 | */ | |
2201 | return zebra_vxlan_local_neigh_del(ifp, link_if, &ip); | |
2232a77c | 2202 | } |
2203 | ||
d62a17ae | 2204 | static int netlink_neigh_table(struct sockaddr_nl *snl, struct nlmsghdr *h, |
2205 | ns_id_t ns_id, int startup) | |
2232a77c | 2206 | { |
d62a17ae | 2207 | int len; |
2208 | struct ndmsg *ndm; | |
2232a77c | 2209 | |
d62a17ae | 2210 | if (h->nlmsg_type != RTM_NEWNEIGH) |
2211 | return 0; | |
2232a77c | 2212 | |
d62a17ae | 2213 | /* Length validity. */ |
2214 | len = h->nlmsg_len - NLMSG_LENGTH(sizeof(struct ndmsg)); | |
2215 | if (len < 0) | |
2216 | return -1; | |
2232a77c | 2217 | |
d62a17ae | 2218 | /* We are interested only in AF_INET or AF_INET6 notifications. */ |
2219 | ndm = NLMSG_DATA(h); | |
2220 | if (ndm->ndm_family != AF_INET && ndm->ndm_family != AF_INET6) | |
2221 | return 0; | |
2232a77c | 2222 | |
d62a17ae | 2223 | return netlink_neigh_change(snl, h, len); |
2232a77c | 2224 | } |
2225 | ||
2226 | /* Request for IP neighbor information from the kernel */ | |
d62a17ae | 2227 | static int netlink_request_neigh(struct zebra_ns *zns, int family, int type, |
2228 | ifindex_t ifindex) | |
2232a77c | 2229 | { |
d62a17ae | 2230 | struct { |
2231 | struct nlmsghdr n; | |
2232 | struct ndmsg ndm; | |
2233 | char buf[256]; | |
2234 | } req; | |
2235 | ||
2236 | /* Form the request, specifying filter (rtattr) if needed. */ | |
2237 | memset(&req, 0, sizeof(req)); | |
2238 | req.n.nlmsg_type = type; | |
2239 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)); | |
2240 | req.ndm.ndm_family = family; | |
2241 | if (ifindex) | |
2242 | addattr32(&req.n, sizeof(req), NDA_IFINDEX, ifindex); | |
2243 | ||
2244 | return netlink_request(&zns->netlink_cmd, &req.n); | |
2232a77c | 2245 | } |
2246 | ||
2247 | /* | |
2248 | * IP Neighbor table read using netlink interface. This is invoked | |
2249 | * at startup. | |
2250 | */ | |
d62a17ae | 2251 | int netlink_neigh_read(struct zebra_ns *zns) |
2232a77c | 2252 | { |
d62a17ae | 2253 | int ret; |
2232a77c | 2254 | |
d62a17ae | 2255 | /* Get IP neighbor table. */ |
2256 | ret = netlink_request_neigh(zns, AF_UNSPEC, RTM_GETNEIGH, 0); | |
2257 | if (ret < 0) | |
2258 | return ret; | |
2259 | ret = netlink_parse_info(netlink_neigh_table, &zns->netlink_cmd, zns, 0, | |
2260 | 1); | |
2232a77c | 2261 | |
d62a17ae | 2262 | return ret; |
2232a77c | 2263 | } |
2264 | ||
2265 | /* | |
2266 | * IP Neighbor table read using netlink interface. This is for a specific | |
2267 | * VLAN device. | |
2268 | */ | |
d62a17ae | 2269 | int netlink_neigh_read_for_vlan(struct zebra_ns *zns, struct interface *vlan_if) |
2232a77c | 2270 | { |
d62a17ae | 2271 | int ret = 0; |
2232a77c | 2272 | |
d62a17ae | 2273 | ret = netlink_request_neigh(zns, AF_UNSPEC, RTM_GETNEIGH, |
2274 | vlan_if->ifindex); | |
2275 | if (ret < 0) | |
2276 | return ret; | |
2277 | ret = netlink_parse_info(netlink_neigh_table, &zns->netlink_cmd, zns, 0, | |
2278 | 0); | |
2232a77c | 2279 | |
d62a17ae | 2280 | return ret; |
2232a77c | 2281 | } |
2282 | ||
d62a17ae | 2283 | int netlink_neigh_change(struct sockaddr_nl *snl, struct nlmsghdr *h, |
2284 | ns_id_t ns_id) | |
2232a77c | 2285 | { |
d62a17ae | 2286 | int len; |
2287 | struct ndmsg *ndm; | |
2232a77c | 2288 | |
d62a17ae | 2289 | if (!(h->nlmsg_type == RTM_NEWNEIGH || h->nlmsg_type == RTM_DELNEIGH)) |
2290 | return 0; | |
2232a77c | 2291 | |
d62a17ae | 2292 | /* Length validity. */ |
2293 | len = h->nlmsg_len - NLMSG_LENGTH(sizeof(struct ndmsg)); | |
2294 | if (len < 0) | |
2295 | return -1; | |
2232a77c | 2296 | |
d62a17ae | 2297 | /* Is this a notification for the MAC FDB or IP neighbor table? */ |
2298 | ndm = NLMSG_DATA(h); | |
2299 | if (ndm->ndm_family == AF_BRIDGE) | |
2300 | return netlink_macfdb_change(snl, h, len); | |
2232a77c | 2301 | |
d62a17ae | 2302 | if (ndm->ndm_type != RTN_UNICAST) |
2303 | return 0; | |
2232a77c | 2304 | |
d62a17ae | 2305 | if (ndm->ndm_family == AF_INET || ndm->ndm_family == AF_INET6) |
2306 | return netlink_ipneigh_change(snl, h, len); | |
2232a77c | 2307 | |
d62a17ae | 2308 | return 0; |
2232a77c | 2309 | } |
2310 | ||
d62a17ae | 2311 | static int netlink_neigh_update2(struct interface *ifp, struct ipaddr *ip, |
2312 | struct ethaddr *mac, u_int32_t flags, int cmd) | |
2232a77c | 2313 | { |
d62a17ae | 2314 | struct { |
2315 | struct nlmsghdr n; | |
2316 | struct ndmsg ndm; | |
2317 | char buf[256]; | |
2318 | } req; | |
2319 | int ipa_len; | |
2320 | ||
2321 | struct zebra_ns *zns = zebra_ns_lookup(NS_DEFAULT); | |
2322 | char buf[INET6_ADDRSTRLEN]; | |
2323 | char buf2[ETHER_ADDR_STRLEN]; | |
2324 | ||
2325 | memset(&req.n, 0, sizeof(req.n)); | |
2326 | memset(&req.ndm, 0, sizeof(req.ndm)); | |
2327 | ||
2328 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)); | |
2329 | req.n.nlmsg_flags = NLM_F_REQUEST; | |
2330 | if (cmd == RTM_NEWNEIGH) | |
2331 | req.n.nlmsg_flags |= (NLM_F_CREATE | NLM_F_REPLACE); | |
2332 | req.n.nlmsg_type = cmd; // RTM_NEWNEIGH or RTM_DELNEIGH | |
2333 | req.ndm.ndm_family = IS_IPADDR_V4(ip) ? AF_INET : AF_INET6; | |
2334 | req.ndm.ndm_state = flags; | |
2335 | req.ndm.ndm_ifindex = ifp->ifindex; | |
2336 | req.ndm.ndm_type = RTN_UNICAST; | |
2337 | req.ndm.ndm_flags = NTF_EXT_LEARNED; | |
2338 | ||
2339 | ||
2340 | ipa_len = IS_IPADDR_V4(ip) ? IPV4_MAX_BYTELEN : IPV6_MAX_BYTELEN; | |
2341 | addattr_l(&req.n, sizeof(req), NDA_DST, &ip->ip.addr, ipa_len); | |
2342 | if (mac) | |
2343 | addattr_l(&req.n, sizeof(req), NDA_LLADDR, mac, 6); | |
2344 | ||
2345 | if (IS_ZEBRA_DEBUG_KERNEL) | |
2346 | zlog_debug("Tx %s family %s IF %s(%u) Neigh %s MAC %s", | |
2347 | nl_msg_type_to_str(cmd), | |
2348 | nl_family_to_str(req.ndm.ndm_family), ifp->name, | |
2349 | ifp->ifindex, ipaddr2str(ip, buf, sizeof(buf)), | |
2350 | mac ? prefix_mac2str(mac, buf2, sizeof(buf2)) | |
2351 | : "null"); | |
2352 | ||
2353 | return netlink_talk(netlink_talk_filter, &req.n, &zns->netlink_cmd, zns, | |
2354 | 0); | |
2232a77c | 2355 | } |
2356 | ||
d62a17ae | 2357 | int kernel_add_mac(struct interface *ifp, vlanid_t vid, struct ethaddr *mac, |
2358 | struct in_addr vtep_ip, u_char sticky) | |
2232a77c | 2359 | { |
d62a17ae | 2360 | return netlink_macfdb_update(ifp, vid, mac, vtep_ip, 0, RTM_NEWNEIGH, |
2361 | sticky); | |
2232a77c | 2362 | } |
2363 | ||
d62a17ae | 2364 | int kernel_del_mac(struct interface *ifp, vlanid_t vid, struct ethaddr *mac, |
2365 | struct in_addr vtep_ip, int local) | |
2232a77c | 2366 | { |
d62a17ae | 2367 | return netlink_macfdb_update(ifp, vid, mac, vtep_ip, local, |
2368 | RTM_DELNEIGH, 0); | |
2232a77c | 2369 | } |
2370 | ||
d62a17ae | 2371 | int kernel_add_neigh(struct interface *ifp, struct ipaddr *ip, |
2372 | struct ethaddr *mac) | |
2232a77c | 2373 | { |
d62a17ae | 2374 | return netlink_neigh_update2(ifp, ip, mac, NUD_REACHABLE, RTM_NEWNEIGH); |
2232a77c | 2375 | } |
2376 | ||
d62a17ae | 2377 | int kernel_del_neigh(struct interface *ifp, struct ipaddr *ip) |
2232a77c | 2378 | { |
d62a17ae | 2379 | return netlink_neigh_update2(ifp, ip, NULL, 0, RTM_DELNEIGH); |
2232a77c | 2380 | } |
2381 | ||
40c7bdb0 | 2382 | /* |
2383 | * MPLS label forwarding table change via netlink interface. | |
2384 | */ | |
d62a17ae | 2385 | int netlink_mpls_multipath(int cmd, zebra_lsp_t *lsp) |
40c7bdb0 | 2386 | { |
d62a17ae | 2387 | mpls_lse_t lse; |
2388 | zebra_nhlfe_t *nhlfe; | |
2389 | struct nexthop *nexthop = NULL; | |
2390 | unsigned int nexthop_num; | |
2391 | const char *routedesc; | |
2392 | struct zebra_ns *zns = zebra_ns_lookup(NS_DEFAULT); | |
805444ce | 2393 | int route_type; |
d62a17ae | 2394 | |
2395 | struct { | |
2396 | struct nlmsghdr n; | |
2397 | struct rtmsg r; | |
2398 | char buf[NL_PKT_BUF_SIZE]; | |
2399 | } req; | |
2400 | ||
2401 | memset(&req, 0, sizeof req - NL_PKT_BUF_SIZE); | |
2402 | ||
d62a17ae | 2403 | /* |
2404 | * Count # nexthops so we can decide whether to use singlepath | |
2405 | * or multipath case. | |
2406 | */ | |
2407 | nexthop_num = 0; | |
2408 | for (nhlfe = lsp->nhlfe_list; nhlfe; nhlfe = nhlfe->next) { | |
2409 | nexthop = nhlfe->nexthop; | |
2410 | if (!nexthop) | |
2411 | continue; | |
2412 | if (cmd == RTM_NEWROUTE) { | |
2413 | /* Count all selected NHLFEs */ | |
2414 | if (CHECK_FLAG(nhlfe->flags, NHLFE_FLAG_SELECTED) | |
2415 | && CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE)) | |
2416 | nexthop_num++; | |
2417 | } else /* DEL */ | |
2418 | { | |
2419 | /* Count all installed NHLFEs */ | |
2420 | if (CHECK_FLAG(nhlfe->flags, NHLFE_FLAG_INSTALLED) | |
2421 | && CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB)) | |
2422 | nexthop_num++; | |
2423 | } | |
2424 | } | |
2425 | ||
8dc8a4b6 | 2426 | if ((nexthop_num == 0) || (!lsp->best_nhlfe && (cmd != RTM_DELROUTE))) |
d62a17ae | 2427 | return 0; |
2428 | ||
2429 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)); | |
2430 | req.n.nlmsg_flags = NLM_F_CREATE | NLM_F_REQUEST; | |
2431 | req.n.nlmsg_type = cmd; | |
2432 | req.n.nlmsg_pid = zns->netlink_cmd.snl.nl_pid; | |
2433 | ||
2434 | req.r.rtm_family = AF_MPLS; | |
2435 | req.r.rtm_table = RT_TABLE_MAIN; | |
2436 | req.r.rtm_dst_len = MPLS_LABEL_LEN_BITS; | |
d62a17ae | 2437 | req.r.rtm_scope = RT_SCOPE_UNIVERSE; |
2438 | req.r.rtm_type = RTN_UNICAST; | |
2439 | ||
8dc8a4b6 | 2440 | if (cmd == RTM_NEWROUTE) { |
d62a17ae | 2441 | /* We do a replace to handle update. */ |
2442 | req.n.nlmsg_flags |= NLM_F_REPLACE; | |
2443 | ||
8dc8a4b6 DS |
2444 | /* set the protocol value if installing */ |
2445 | route_type = re_type_from_lsp_type(lsp->best_nhlfe->type); | |
2446 | req.r.rtm_protocol = zebra2proto(route_type); | |
2447 | } | |
2448 | ||
d62a17ae | 2449 | /* Fill destination */ |
2450 | lse = mpls_lse_encode(lsp->ile.in_label, 0, 0, 1); | |
2451 | addattr_l(&req.n, sizeof req, RTA_DST, &lse, sizeof(mpls_lse_t)); | |
2452 | ||
2453 | /* Fill nexthops (paths) based on single-path or multipath. The paths | |
2454 | * chosen depend on the operation. | |
2455 | */ | |
2456 | if (nexthop_num == 1 || multipath_num == 1) { | |
8b1450b9 | 2457 | routedesc = "single-path"; |
d62a17ae | 2458 | _netlink_mpls_debug(cmd, lsp->ile.in_label, routedesc); |
2459 | ||
2460 | nexthop_num = 0; | |
2461 | for (nhlfe = lsp->nhlfe_list; nhlfe; nhlfe = nhlfe->next) { | |
2462 | nexthop = nhlfe->nexthop; | |
2463 | if (!nexthop) | |
2464 | continue; | |
2465 | ||
2466 | if ((cmd == RTM_NEWROUTE | |
2467 | && (CHECK_FLAG(nhlfe->flags, NHLFE_FLAG_SELECTED) | |
2468 | && CHECK_FLAG(nexthop->flags, | |
2469 | NEXTHOP_FLAG_ACTIVE))) | |
2470 | || (cmd == RTM_DELROUTE | |
2471 | && (CHECK_FLAG(nhlfe->flags, | |
2472 | NHLFE_FLAG_INSTALLED) | |
2473 | && CHECK_FLAG(nexthop->flags, | |
2474 | NEXTHOP_FLAG_FIB)))) { | |
2475 | /* Add the gateway */ | |
2476 | _netlink_mpls_build_singlepath(routedesc, nhlfe, | |
2477 | &req.n, &req.r, | |
2478 | sizeof req, cmd); | |
d62a17ae | 2479 | nexthop_num++; |
2480 | break; | |
2481 | } | |
2482 | } | |
2483 | } else /* Multipath case */ | |
2484 | { | |
2485 | char buf[NL_PKT_BUF_SIZE]; | |
2486 | struct rtattr *rta = (void *)buf; | |
2487 | struct rtnexthop *rtnh; | |
2488 | union g_addr *src1 = NULL; | |
2489 | ||
2490 | rta->rta_type = RTA_MULTIPATH; | |
2491 | rta->rta_len = RTA_LENGTH(0); | |
2492 | rtnh = RTA_DATA(rta); | |
2493 | ||
8b1450b9 | 2494 | routedesc = "multipath"; |
d62a17ae | 2495 | _netlink_mpls_debug(cmd, lsp->ile.in_label, routedesc); |
2496 | ||
2497 | nexthop_num = 0; | |
2498 | for (nhlfe = lsp->nhlfe_list; nhlfe; nhlfe = nhlfe->next) { | |
2499 | nexthop = nhlfe->nexthop; | |
2500 | if (!nexthop) | |
2501 | continue; | |
2502 | ||
2503 | if (nexthop_num >= multipath_num) | |
2504 | break; | |
2505 | ||
2506 | if ((cmd == RTM_NEWROUTE | |
2507 | && (CHECK_FLAG(nhlfe->flags, NHLFE_FLAG_SELECTED) | |
2508 | && CHECK_FLAG(nexthop->flags, | |
2509 | NEXTHOP_FLAG_ACTIVE))) | |
2510 | || (cmd == RTM_DELROUTE | |
2511 | && (CHECK_FLAG(nhlfe->flags, | |
2512 | NHLFE_FLAG_INSTALLED) | |
2513 | && CHECK_FLAG(nexthop->flags, | |
2514 | NEXTHOP_FLAG_FIB)))) { | |
2515 | nexthop_num++; | |
2516 | ||
2517 | /* Build the multipath */ | |
2518 | _netlink_mpls_build_multipath(routedesc, nhlfe, | |
2519 | rta, rtnh, &req.r, | |
2520 | &src1); | |
2521 | rtnh = RTNH_NEXT(rtnh); | |
d62a17ae | 2522 | } |
2523 | } | |
2524 | ||
2525 | /* Add the multipath */ | |
2526 | if (rta->rta_len > RTA_LENGTH(0)) | |
2527 | addattr_l(&req.n, NL_PKT_BUF_SIZE, RTA_MULTIPATH, | |
2528 | RTA_DATA(rta), RTA_PAYLOAD(rta)); | |
2529 | } | |
2530 | ||
2531 | /* Talk to netlink socket. */ | |
2532 | return netlink_talk(netlink_talk_filter, &req.n, &zns->netlink_cmd, zns, | |
2533 | 0); | |
40c7bdb0 | 2534 | } |
ddfeb486 | 2535 | #endif /* HAVE_NETLINK */ |