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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> | |
d9f5b2f5 | 30 | #include <linux/nexthop.h> |
718e3744 | 31 | |
32 | /* Hack for GNU libc version 2. */ | |
33 | #ifndef MSG_TRUNC | |
34 | #define MSG_TRUNC 0x20 | |
35 | #endif /* MSG_TRUNC */ | |
36 | ||
37 | #include "linklist.h" | |
38 | #include "if.h" | |
39 | #include "log.h" | |
40 | #include "prefix.h" | |
41 | #include "connected.h" | |
42 | #include "table.h" | |
26e2ae36 | 43 | #include "memory.h" |
4a1ab8e4 | 44 | #include "zebra_memory.h" |
718e3744 | 45 | #include "rib.h" |
e04ab74d | 46 | #include "thread.h" |
edd7c245 | 47 | #include "privs.h" |
fb018d25 | 48 | #include "nexthop.h" |
78104b9b | 49 | #include "vrf.h" |
5e6a74d8 | 50 | #include "vty.h" |
40c7bdb0 | 51 | #include "mpls.h" |
13d60d35 | 52 | #include "vxlan.h" |
8d03bc50 | 53 | #include "printfrr.h" |
718e3744 | 54 | |
bf094f69 | 55 | #include "zebra/zapi_msg.h" |
fe18ee2d | 56 | #include "zebra/zebra_ns.h" |
7c551956 | 57 | #include "zebra/zebra_vrf.h" |
6621ca86 | 58 | #include "zebra/rt.h" |
718e3744 | 59 | #include "zebra/redistribute.h" |
60 | #include "zebra/interface.h" | |
61 | #include "zebra/debug.h" | |
12f6fb97 | 62 | #include "zebra/rtadv.h" |
567b877d | 63 | #include "zebra/zebra_ptm.h" |
40c7bdb0 | 64 | #include "zebra/zebra_mpls.h" |
1fdc9eae | 65 | #include "zebra/kernel_netlink.h" |
66 | #include "zebra/rt_netlink.h" | |
d9f5b2f5 | 67 | #include "zebra/zebra_nhg.h" |
e3be0432 | 68 | #include "zebra/zebra_mroute.h" |
2232a77c | 69 | #include "zebra/zebra_vxlan.h" |
364fed6b | 70 | #include "zebra/zebra_errors.h" |
e3be0432 | 71 | |
40c7bdb0 | 72 | #ifndef AF_MPLS |
73 | #define AF_MPLS 28 | |
74 | #endif | |
75 | ||
2232a77c | 76 | static vlanid_t filter_vlan = 0; |
77 | ||
fec211ad | 78 | static bool supports_nh; |
81505946 | 79 | |
d62a17ae | 80 | struct gw_family_t { |
d7c0a89a QY |
81 | uint16_t filler; |
82 | uint16_t family; | |
d62a17ae | 83 | union g_addr gate; |
40c7bdb0 | 84 | }; |
85 | ||
2b64873d DL |
86 | static const char ipv4_ll_buf[16] = "169.254.0.1"; |
87 | static struct in_addr ipv4_ll; | |
8755598a DS |
88 | |
89 | /* | |
90 | * The ipv4_ll data structure is used for all 5549 | |
91 | * additions to the kernel. Let's figure out the | |
92 | * correct value one time instead for every | |
93 | * install/remove of a 5549 type route | |
94 | */ | |
d62a17ae | 95 | void rt_netlink_init(void) |
8755598a | 96 | { |
d62a17ae | 97 | inet_pton(AF_INET, ipv4_ll_buf, &ipv4_ll); |
8755598a DS |
98 | } |
99 | ||
931fa60c MS |
100 | /* |
101 | * Mapping from dataplane neighbor flags to netlink flags | |
102 | */ | |
103 | static uint8_t neigh_flags_to_netlink(uint8_t dplane_flags) | |
104 | { | |
105 | uint8_t flags = 0; | |
106 | ||
107 | if (dplane_flags & DPLANE_NTF_EXT_LEARNED) | |
108 | flags |= NTF_EXT_LEARNED; | |
109 | if (dplane_flags & DPLANE_NTF_ROUTER) | |
110 | flags |= NTF_ROUTER; | |
111 | ||
112 | return flags; | |
113 | } | |
114 | ||
115 | /* | |
116 | * Mapping from dataplane neighbor state to netlink state | |
117 | */ | |
118 | static uint16_t neigh_state_to_netlink(uint16_t dplane_state) | |
119 | { | |
120 | uint16_t state = 0; | |
121 | ||
122 | if (dplane_state & DPLANE_NUD_REACHABLE) | |
123 | state |= NUD_REACHABLE; | |
124 | if (dplane_state & DPLANE_NUD_STALE) | |
125 | state |= NUD_STALE; | |
126 | if (dplane_state & DPLANE_NUD_NOARP) | |
127 | state |= NUD_NOARP; | |
128 | if (dplane_state & DPLANE_NUD_PROBE) | |
129 | state |= NUD_PROBE; | |
130 | ||
131 | return state; | |
132 | } | |
133 | ||
134 | ||
23b1f334 DD |
135 | static inline int is_selfroute(int proto) |
136 | { | |
d62a17ae | 137 | if ((proto == RTPROT_BGP) || (proto == RTPROT_OSPF) |
d4d71f11 | 138 | || (proto == RTPROT_ZSTATIC) || (proto == RTPROT_ZEBRA) |
d62a17ae | 139 | || (proto == RTPROT_ISIS) || (proto == RTPROT_RIPNG) |
140 | || (proto == RTPROT_NHRP) || (proto == RTPROT_EIGRP) | |
915902cb | 141 | || (proto == RTPROT_LDP) || (proto == RTPROT_BABEL) |
0761368a | 142 | || (proto == RTPROT_RIP) || (proto == RTPROT_SHARP) |
da82f6b4 | 143 | || (proto == RTPROT_PBR) || (proto == RTPROT_OPENFABRIC)) { |
d62a17ae | 144 | return 1; |
145 | } | |
146 | ||
147 | return 0; | |
23b1f334 DD |
148 | } |
149 | ||
915902cb | 150 | static inline int zebra2proto(int proto) |
23b1f334 | 151 | { |
d62a17ae | 152 | switch (proto) { |
153 | case ZEBRA_ROUTE_BABEL: | |
154 | proto = RTPROT_BABEL; | |
155 | break; | |
156 | case ZEBRA_ROUTE_BGP: | |
157 | proto = RTPROT_BGP; | |
158 | break; | |
159 | case ZEBRA_ROUTE_OSPF: | |
160 | case ZEBRA_ROUTE_OSPF6: | |
161 | proto = RTPROT_OSPF; | |
162 | break; | |
163 | case ZEBRA_ROUTE_STATIC: | |
d4d71f11 | 164 | proto = RTPROT_ZSTATIC; |
d62a17ae | 165 | break; |
166 | case ZEBRA_ROUTE_ISIS: | |
167 | proto = RTPROT_ISIS; | |
168 | break; | |
169 | case ZEBRA_ROUTE_RIP: | |
170 | proto = RTPROT_RIP; | |
171 | break; | |
172 | case ZEBRA_ROUTE_RIPNG: | |
173 | proto = RTPROT_RIPNG; | |
174 | break; | |
175 | case ZEBRA_ROUTE_NHRP: | |
176 | proto = RTPROT_NHRP; | |
177 | break; | |
178 | case ZEBRA_ROUTE_EIGRP: | |
179 | proto = RTPROT_EIGRP; | |
180 | break; | |
181 | case ZEBRA_ROUTE_LDP: | |
182 | proto = RTPROT_LDP; | |
183 | break; | |
8a71d93d DS |
184 | case ZEBRA_ROUTE_SHARP: |
185 | proto = RTPROT_SHARP; | |
186 | break; | |
0761368a DS |
187 | case ZEBRA_ROUTE_PBR: |
188 | proto = RTPROT_PBR; | |
189 | break; | |
da82f6b4 CF |
190 | case ZEBRA_ROUTE_OPENFABRIC: |
191 | proto = RTPROT_OPENFABRIC; | |
192 | break; | |
a56ec5c0 | 193 | case ZEBRA_ROUTE_TABLE: |
38e40db1 | 194 | case ZEBRA_ROUTE_NHG: |
a56ec5c0 DS |
195 | proto = RTPROT_ZEBRA; |
196 | break; | |
d62a17ae | 197 | default: |
0761368a DS |
198 | /* |
199 | * When a user adds a new protocol this will show up | |
200 | * to let them know to do something about it. This | |
201 | * is intentionally a warn because we should see | |
202 | * this as part of development of a new protocol | |
203 | */ | |
9df414fe QY |
204 | zlog_debug( |
205 | "%s: Please add this protocol(%d) to proper rt_netlink.c handling", | |
206 | __PRETTY_FUNCTION__, proto); | |
d62a17ae | 207 | proto = RTPROT_ZEBRA; |
208 | break; | |
209 | } | |
210 | ||
211 | return proto; | |
23b1f334 DD |
212 | } |
213 | ||
38e40db1 | 214 | static inline int proto2zebra(int proto, int family, bool is_nexthop) |
915902cb DS |
215 | { |
216 | switch (proto) { | |
217 | case RTPROT_BABEL: | |
218 | proto = ZEBRA_ROUTE_BABEL; | |
219 | break; | |
220 | case RTPROT_BGP: | |
221 | proto = ZEBRA_ROUTE_BGP; | |
222 | break; | |
223 | case RTPROT_OSPF: | |
996c9314 LB |
224 | proto = (family == AFI_IP) ? ZEBRA_ROUTE_OSPF |
225 | : ZEBRA_ROUTE_OSPF6; | |
915902cb DS |
226 | break; |
227 | case RTPROT_ISIS: | |
228 | proto = ZEBRA_ROUTE_ISIS; | |
229 | break; | |
230 | case RTPROT_RIP: | |
231 | proto = ZEBRA_ROUTE_RIP; | |
232 | break; | |
233 | case RTPROT_RIPNG: | |
234 | proto = ZEBRA_ROUTE_RIPNG; | |
235 | break; | |
236 | case RTPROT_NHRP: | |
237 | proto = ZEBRA_ROUTE_NHRP; | |
238 | break; | |
239 | case RTPROT_EIGRP: | |
240 | proto = ZEBRA_ROUTE_EIGRP; | |
241 | break; | |
242 | case RTPROT_LDP: | |
243 | proto = ZEBRA_ROUTE_LDP; | |
244 | break; | |
245 | case RTPROT_STATIC: | |
d4d71f11 | 246 | case RTPROT_ZSTATIC: |
915902cb DS |
247 | proto = ZEBRA_ROUTE_STATIC; |
248 | break; | |
0761368a DS |
249 | case RTPROT_SHARP: |
250 | proto = ZEBRA_ROUTE_SHARP; | |
251 | break; | |
252 | case RTPROT_PBR: | |
253 | proto = ZEBRA_ROUTE_PBR; | |
254 | break; | |
da82f6b4 CF |
255 | case RTPROT_OPENFABRIC: |
256 | proto = ZEBRA_ROUTE_OPENFABRIC; | |
257 | break; | |
38e40db1 SW |
258 | case RTPROT_ZEBRA: |
259 | if (is_nexthop) { | |
260 | proto = ZEBRA_ROUTE_NHG; | |
261 | break; | |
262 | } | |
263 | /* Intentional fall thru */ | |
915902cb | 264 | default: |
0761368a DS |
265 | /* |
266 | * When a user adds a new protocol this will show up | |
267 | * to let them know to do something about it. This | |
268 | * is intentionally a warn because we should see | |
269 | * this as part of development of a new protocol | |
270 | */ | |
9df414fe QY |
271 | zlog_debug( |
272 | "%s: Please add this protocol(%d) to proper rt_netlink.c handling", | |
273 | __PRETTY_FUNCTION__, proto); | |
915902cb DS |
274 | proto = ZEBRA_ROUTE_KERNEL; |
275 | break; | |
276 | } | |
277 | return proto; | |
278 | } | |
279 | ||
12f6fb97 DS |
280 | /* |
281 | Pending: create an efficient table_id (in a tree/hash) based lookup) | |
282 | */ | |
d7c0a89a | 283 | static vrf_id_t vrf_lookup_by_table(uint32_t table_id, ns_id_t ns_id) |
12f6fb97 | 284 | { |
d62a17ae | 285 | struct vrf *vrf; |
286 | struct zebra_vrf *zvrf; | |
12f6fb97 | 287 | |
a2addae8 | 288 | RB_FOREACH (vrf, vrf_id_head, &vrfs_by_id) { |
78dd30b2 PG |
289 | zvrf = vrf->info; |
290 | if (zvrf == NULL) | |
d62a17ae | 291 | continue; |
78dd30b2 PG |
292 | /* case vrf with netns : match the netnsid */ |
293 | if (vrf_is_backend_netns()) { | |
294 | if (ns_id == zvrf_id(zvrf)) | |
295 | return zvrf_id(zvrf); | |
296 | } else { | |
297 | /* VRF is VRF_BACKEND_VRF_LITE */ | |
298 | if (zvrf->table_id != table_id) | |
299 | continue; | |
300 | return zvrf_id(zvrf); | |
301 | } | |
d62a17ae | 302 | } |
12f6fb97 | 303 | |
d62a17ae | 304 | return VRF_DEFAULT; |
12f6fb97 DS |
305 | } |
306 | ||
87da6a60 SW |
307 | /** |
308 | * @parse_encap_mpls() - Parses encapsulated mpls attributes | |
309 | * @tb: Pointer to rtattr to look for nested items in. | |
310 | * @labels: Pointer to store labels in. | |
311 | * | |
312 | * Return: Number of mpls labels found. | |
313 | */ | |
314 | static int parse_encap_mpls(struct rtattr *tb, mpls_label_t *labels) | |
315 | { | |
316 | struct rtattr *tb_encap[MPLS_IPTUNNEL_MAX + 1] = {0}; | |
317 | mpls_lse_t *lses = NULL; | |
318 | int num_labels = 0; | |
319 | uint32_t ttl = 0; | |
320 | uint32_t bos = 0; | |
321 | uint32_t exp = 0; | |
322 | mpls_label_t label = 0; | |
323 | ||
324 | netlink_parse_rtattr_nested(tb_encap, MPLS_IPTUNNEL_MAX, tb); | |
325 | lses = (mpls_lse_t *)RTA_DATA(tb_encap[MPLS_IPTUNNEL_DST]); | |
326 | while (!bos && num_labels < MPLS_MAX_LABELS) { | |
327 | mpls_lse_decode(lses[num_labels], &label, &ttl, &exp, &bos); | |
328 | labels[num_labels++] = label; | |
329 | } | |
330 | ||
331 | return num_labels; | |
332 | } | |
333 | ||
77a44d94 SW |
334 | static struct nexthop |
335 | parse_nexthop_unicast(ns_id_t ns_id, struct rtmsg *rtm, struct rtattr **tb, | |
336 | enum blackhole_type bh_type, int index, void *prefsrc, | |
20822f9d | 337 | void *gate, afi_t afi, vrf_id_t vrf_id) |
77a44d94 SW |
338 | { |
339 | struct interface *ifp = NULL; | |
340 | struct nexthop nh = {0}; | |
341 | mpls_label_t labels[MPLS_MAX_LABELS] = {0}; | |
342 | int num_labels = 0; | |
343 | ||
20822f9d | 344 | vrf_id_t nh_vrf_id = vrf_id; |
77a44d94 SW |
345 | size_t sz = (afi == AFI_IP) ? 4 : 16; |
346 | ||
347 | if (bh_type == BLACKHOLE_UNSPEC) { | |
348 | if (index && !gate) | |
349 | nh.type = NEXTHOP_TYPE_IFINDEX; | |
350 | else if (index && gate) | |
351 | nh.type = (afi == AFI_IP) ? NEXTHOP_TYPE_IPV4_IFINDEX | |
352 | : NEXTHOP_TYPE_IPV6_IFINDEX; | |
353 | else if (!index && gate) | |
354 | nh.type = (afi == AFI_IP) ? NEXTHOP_TYPE_IPV4 | |
355 | : NEXTHOP_TYPE_IPV6; | |
356 | else { | |
357 | nh.type = NEXTHOP_TYPE_BLACKHOLE; | |
358 | nh.bh_type = bh_type; | |
359 | } | |
360 | } else { | |
361 | nh.type = NEXTHOP_TYPE_BLACKHOLE; | |
362 | nh.bh_type = bh_type; | |
363 | } | |
364 | nh.ifindex = index; | |
365 | if (prefsrc) | |
366 | memcpy(&nh.src, prefsrc, sz); | |
367 | if (gate) | |
368 | memcpy(&nh.gate, gate, sz); | |
369 | ||
370 | if (index) { | |
371 | ifp = if_lookup_by_index_per_ns(zebra_ns_lookup(ns_id), index); | |
372 | if (ifp) | |
373 | nh_vrf_id = ifp->vrf_id; | |
374 | } | |
375 | nh.vrf_id = nh_vrf_id; | |
376 | ||
377 | if (tb[RTA_ENCAP] && tb[RTA_ENCAP_TYPE] | |
378 | && *(uint16_t *)RTA_DATA(tb[RTA_ENCAP_TYPE]) | |
379 | == LWTUNNEL_ENCAP_MPLS) { | |
380 | num_labels = parse_encap_mpls(tb[RTA_ENCAP], labels); | |
381 | } | |
382 | ||
383 | if (rtm->rtm_flags & RTNH_F_ONLINK) | |
384 | SET_FLAG(nh.flags, NEXTHOP_FLAG_ONLINK); | |
385 | ||
386 | if (num_labels) | |
387 | nexthop_add_labels(&nh, ZEBRA_LSP_STATIC, num_labels, labels); | |
388 | ||
389 | return nh; | |
390 | } | |
391 | ||
20822f9d | 392 | static uint8_t parse_multipath_nexthops_unicast(ns_id_t ns_id, |
0eb97b86 | 393 | struct nexthop_group *ng, |
20822f9d SW |
394 | struct rtmsg *rtm, |
395 | struct rtnexthop *rtnh, | |
396 | struct rtattr **tb, | |
397 | void *prefsrc, vrf_id_t vrf_id) | |
398 | { | |
399 | void *gate = NULL; | |
400 | struct interface *ifp = NULL; | |
401 | int index = 0; | |
402 | /* MPLS labels */ | |
403 | mpls_label_t labels[MPLS_MAX_LABELS] = {0}; | |
404 | int num_labels = 0; | |
405 | struct rtattr *rtnh_tb[RTA_MAX + 1] = {}; | |
406 | ||
407 | int len = RTA_PAYLOAD(tb[RTA_MULTIPATH]); | |
408 | vrf_id_t nh_vrf_id = vrf_id; | |
409 | ||
20822f9d SW |
410 | for (;;) { |
411 | struct nexthop *nh = NULL; | |
412 | ||
413 | if (len < (int)sizeof(*rtnh) || rtnh->rtnh_len > len) | |
414 | break; | |
415 | ||
416 | index = rtnh->rtnh_ifindex; | |
417 | if (index) { | |
418 | /* | |
419 | * Yes we are looking this up | |
420 | * for every nexthop and just | |
421 | * using the last one looked | |
422 | * up right now | |
423 | */ | |
424 | ifp = if_lookup_by_index_per_ns(zebra_ns_lookup(ns_id), | |
425 | index); | |
426 | if (ifp) | |
427 | nh_vrf_id = ifp->vrf_id; | |
428 | else { | |
429 | flog_warn( | |
430 | EC_ZEBRA_UNKNOWN_INTERFACE, | |
431 | "%s: Unknown interface %u specified, defaulting to VRF_DEFAULT", | |
432 | __PRETTY_FUNCTION__, index); | |
433 | nh_vrf_id = VRF_DEFAULT; | |
434 | } | |
435 | } else | |
436 | nh_vrf_id = vrf_id; | |
437 | ||
438 | if (rtnh->rtnh_len > sizeof(*rtnh)) { | |
439 | memset(rtnh_tb, 0, sizeof(rtnh_tb)); | |
440 | ||
441 | netlink_parse_rtattr(rtnh_tb, RTA_MAX, RTNH_DATA(rtnh), | |
442 | rtnh->rtnh_len - sizeof(*rtnh)); | |
443 | if (rtnh_tb[RTA_GATEWAY]) | |
444 | gate = RTA_DATA(rtnh_tb[RTA_GATEWAY]); | |
445 | if (rtnh_tb[RTA_ENCAP] && rtnh_tb[RTA_ENCAP_TYPE] | |
446 | && *(uint16_t *)RTA_DATA(rtnh_tb[RTA_ENCAP_TYPE]) | |
447 | == LWTUNNEL_ENCAP_MPLS) { | |
448 | num_labels = parse_encap_mpls( | |
449 | rtnh_tb[RTA_ENCAP], labels); | |
450 | } | |
451 | } | |
452 | ||
f3354e16 SW |
453 | if (gate && rtm->rtm_family == AF_INET) { |
454 | if (index) | |
0eb97b86 MS |
455 | nh = nexthop_from_ipv4_ifindex( |
456 | gate, prefsrc, index, nh_vrf_id); | |
f3354e16 | 457 | else |
0eb97b86 MS |
458 | nh = nexthop_from_ipv4(gate, prefsrc, |
459 | nh_vrf_id); | |
f3354e16 SW |
460 | } else if (gate && rtm->rtm_family == AF_INET6) { |
461 | if (index) | |
0eb97b86 MS |
462 | nh = nexthop_from_ipv6_ifindex( |
463 | gate, index, nh_vrf_id); | |
f3354e16 | 464 | else |
0eb97b86 | 465 | nh = nexthop_from_ipv6(gate, nh_vrf_id); |
20822f9d | 466 | } else |
0eb97b86 | 467 | nh = nexthop_from_ifindex(index, nh_vrf_id); |
20822f9d SW |
468 | |
469 | if (nh) { | |
df7fb580 DS |
470 | nh->weight = rtnh->rtnh_hops + 1; |
471 | ||
20822f9d SW |
472 | if (num_labels) |
473 | nexthop_add_labels(nh, ZEBRA_LSP_STATIC, | |
474 | num_labels, labels); | |
475 | ||
476 | if (rtnh->rtnh_flags & RTNH_F_ONLINK) | |
477 | SET_FLAG(nh->flags, NEXTHOP_FLAG_ONLINK); | |
0eb97b86 MS |
478 | |
479 | /* Add to temporary list */ | |
480 | nexthop_group_add_sorted(ng, nh); | |
20822f9d SW |
481 | } |
482 | ||
483 | if (rtnh->rtnh_len == 0) | |
484 | break; | |
485 | ||
486 | len -= NLMSG_ALIGN(rtnh->rtnh_len); | |
487 | rtnh = RTNH_NEXT(rtnh); | |
488 | } | |
489 | ||
0eb97b86 | 490 | uint8_t nhop_num = nexthop_group_nexthop_num(ng); |
20822f9d SW |
491 | |
492 | return nhop_num; | |
493 | } | |
494 | ||
718e3744 | 495 | /* Looking up routing table by netlink interface. */ |
2414abd3 | 496 | static int netlink_route_change_read_unicast(struct nlmsghdr *h, ns_id_t ns_id, |
d62a17ae | 497 | int startup) |
718e3744 | 498 | { |
d62a17ae | 499 | int len; |
500 | struct rtmsg *rtm; | |
501 | struct rtattr *tb[RTA_MAX + 1]; | |
d7c0a89a | 502 | uint8_t flags = 0; |
d62a17ae | 503 | struct prefix p; |
792fa92e | 504 | struct prefix_ipv6 src_p = {}; |
78dd30b2 | 505 | vrf_id_t vrf_id; |
d62a17ae | 506 | |
507 | char anyaddr[16] = {0}; | |
508 | ||
915902cb | 509 | int proto = ZEBRA_ROUTE_KERNEL; |
d62a17ae | 510 | int index = 0; |
511 | int table; | |
512 | int metric = 0; | |
d7c0a89a | 513 | uint32_t mtu = 0; |
25715c7e | 514 | uint8_t distance = 0; |
4e40b6d6 | 515 | route_tag_t tag = 0; |
fcc89a9c | 516 | uint32_t nhe_id = 0; |
d62a17ae | 517 | |
518 | void *dest = NULL; | |
519 | void *gate = NULL; | |
520 | void *prefsrc = NULL; /* IPv4 preferred source host address */ | |
521 | void *src = NULL; /* IPv6 srcdest source prefix */ | |
e655a03c | 522 | enum blackhole_type bh_type = BLACKHOLE_UNSPEC; |
d62a17ae | 523 | |
524 | rtm = NLMSG_DATA(h); | |
525 | ||
526 | if (startup && h->nlmsg_type != RTM_NEWROUTE) | |
527 | return 0; | |
e655a03c DL |
528 | switch (rtm->rtm_type) { |
529 | case RTN_UNICAST: | |
530 | break; | |
531 | case RTN_BLACKHOLE: | |
532 | bh_type = BLACKHOLE_NULL; | |
533 | break; | |
534 | case RTN_UNREACHABLE: | |
535 | bh_type = BLACKHOLE_REJECT; | |
536 | break; | |
537 | case RTN_PROHIBIT: | |
538 | bh_type = BLACKHOLE_ADMINPROHIB; | |
539 | break; | |
540 | default: | |
8c8f250b DS |
541 | if (IS_ZEBRA_DEBUG_KERNEL) |
542 | zlog_debug("Route rtm_type: %s(%d) intentionally ignoring", | |
543 | nl_rttype_to_str(rtm->rtm_type), | |
544 | rtm->rtm_type); | |
d62a17ae | 545 | return 0; |
e655a03c | 546 | } |
d62a17ae | 547 | |
548 | len = h->nlmsg_len - NLMSG_LENGTH(sizeof(struct rtmsg)); | |
9bdf8618 DS |
549 | if (len < 0) { |
550 | zlog_err("%s: Message received from netlink is of a broken size %d %zu", | |
551 | __PRETTY_FUNCTION__, h->nlmsg_len, | |
552 | (size_t)NLMSG_LENGTH(sizeof(struct rtmsg))); | |
d62a17ae | 553 | return -1; |
9bdf8618 | 554 | } |
d62a17ae | 555 | |
556 | memset(tb, 0, sizeof tb); | |
557 | netlink_parse_rtattr(tb, RTA_MAX, RTM_RTA(rtm), len); | |
558 | ||
559 | if (rtm->rtm_flags & RTM_F_CLONED) | |
560 | return 0; | |
561 | if (rtm->rtm_protocol == RTPROT_REDIRECT) | |
562 | return 0; | |
563 | if (rtm->rtm_protocol == RTPROT_KERNEL) | |
564 | return 0; | |
565 | ||
566 | if (!startup && is_selfroute(rtm->rtm_protocol) | |
6ab5222f DS |
567 | && h->nlmsg_type == RTM_NEWROUTE) { |
568 | if (IS_ZEBRA_DEBUG_KERNEL) | |
569 | zlog_debug("Route type: %d Received that we think we have originated, ignoring", | |
570 | rtm->rtm_protocol); | |
d62a17ae | 571 | return 0; |
6ab5222f | 572 | } |
d62a17ae | 573 | |
574 | /* We don't care about change notifications for the MPLS table. */ | |
575 | /* TODO: Revisit this. */ | |
576 | if (rtm->rtm_family == AF_MPLS) | |
577 | return 0; | |
578 | ||
579 | /* Table corresponding to route. */ | |
580 | if (tb[RTA_TABLE]) | |
581 | table = *(int *)RTA_DATA(tb[RTA_TABLE]); | |
582 | else | |
583 | table = rtm->rtm_table; | |
584 | ||
585 | /* Map to VRF */ | |
78dd30b2 | 586 | vrf_id = vrf_lookup_by_table(table, ns_id); |
d62a17ae | 587 | if (vrf_id == VRF_DEFAULT) { |
588 | if (!is_zebra_valid_kernel_table(table) | |
589 | && !is_zebra_main_routing_table(table)) | |
590 | return 0; | |
591 | } | |
592 | ||
593 | /* Route which inserted by Zebra. */ | |
915902cb | 594 | if (is_selfroute(rtm->rtm_protocol)) { |
d62a17ae | 595 | flags |= ZEBRA_FLAG_SELFROUTE; |
38e40db1 | 596 | proto = proto2zebra(rtm->rtm_protocol, rtm->rtm_family, false); |
915902cb | 597 | } |
d62a17ae | 598 | if (tb[RTA_OIF]) |
599 | index = *(int *)RTA_DATA(tb[RTA_OIF]); | |
600 | ||
601 | if (tb[RTA_DST]) | |
602 | dest = RTA_DATA(tb[RTA_DST]); | |
603 | else | |
604 | dest = anyaddr; | |
605 | ||
606 | if (tb[RTA_SRC]) | |
607 | src = RTA_DATA(tb[RTA_SRC]); | |
608 | else | |
609 | src = anyaddr; | |
610 | ||
611 | if (tb[RTA_PREFSRC]) | |
612 | prefsrc = RTA_DATA(tb[RTA_PREFSRC]); | |
613 | ||
614 | if (tb[RTA_GATEWAY]) | |
615 | gate = RTA_DATA(tb[RTA_GATEWAY]); | |
616 | ||
fcc89a9c SW |
617 | if (tb[RTA_NH_ID]) |
618 | nhe_id = *(uint32_t *)RTA_DATA(tb[RTA_NH_ID]); | |
619 | ||
f19435a8 DS |
620 | if (tb[RTA_PRIORITY]) |
621 | metric = *(int *)RTA_DATA(tb[RTA_PRIORITY]); | |
d62a17ae | 622 | |
4e40b6d6 KK |
623 | #if defined(SUPPORT_REALMS) |
624 | if (tb[RTA_FLOW]) | |
625 | tag = *(uint32_t *)RTA_DATA(tb[RTA_FLOW]); | |
626 | #endif | |
627 | ||
f19435a8 DS |
628 | if (tb[RTA_METRICS]) { |
629 | struct rtattr *mxrta[RTAX_MAX + 1]; | |
d62a17ae | 630 | |
f19435a8 | 631 | memset(mxrta, 0, sizeof mxrta); |
996c9314 | 632 | netlink_parse_rtattr(mxrta, RTAX_MAX, RTA_DATA(tb[RTA_METRICS]), |
f19435a8 | 633 | RTA_PAYLOAD(tb[RTA_METRICS])); |
d62a17ae | 634 | |
f19435a8 | 635 | if (mxrta[RTAX_MTU]) |
d7c0a89a | 636 | mtu = *(uint32_t *)RTA_DATA(mxrta[RTAX_MTU]); |
d62a17ae | 637 | } |
638 | ||
639 | if (rtm->rtm_family == AF_INET) { | |
640 | p.family = AF_INET; | |
930571d2 | 641 | if (rtm->rtm_dst_len > IPV4_MAX_BITLEN) { |
e17d9b2d | 642 | zlog_err( |
75829703 | 643 | "Invalid destination prefix length: %u received from kernel route change", |
930571d2 | 644 | rtm->rtm_dst_len); |
e17d9b2d | 645 | return -1; |
930571d2 | 646 | } |
d62a17ae | 647 | memcpy(&p.u.prefix4, dest, 4); |
648 | p.prefixlen = rtm->rtm_dst_len; | |
649 | ||
1f610a1f CF |
650 | if (rtm->rtm_src_len != 0) { |
651 | char buf[PREFIX_STRLEN]; | |
9df414fe | 652 | flog_warn( |
e914ccbe | 653 | EC_ZEBRA_UNSUPPORTED_V4_SRCDEST, |
9df414fe QY |
654 | "unsupported IPv4 sourcedest route (dest %s vrf %u)", |
655 | prefix2str(&p, buf, sizeof(buf)), vrf_id); | |
1f610a1f CF |
656 | return 0; |
657 | } | |
930571d2 | 658 | |
1f610a1f CF |
659 | /* Force debug below to not display anything for source */ |
660 | src_p.prefixlen = 0; | |
d62a17ae | 661 | } else if (rtm->rtm_family == AF_INET6) { |
662 | p.family = AF_INET6; | |
930571d2 | 663 | if (rtm->rtm_dst_len > IPV6_MAX_BITLEN) { |
e17d9b2d | 664 | zlog_err( |
75829703 | 665 | "Invalid destination prefix length: %u received from kernel route change", |
930571d2 | 666 | rtm->rtm_dst_len); |
e17d9b2d | 667 | return -1; |
930571d2 | 668 | } |
d62a17ae | 669 | memcpy(&p.u.prefix6, dest, 16); |
670 | p.prefixlen = rtm->rtm_dst_len; | |
671 | ||
672 | src_p.family = AF_INET6; | |
930571d2 | 673 | if (rtm->rtm_src_len > IPV6_MAX_BITLEN) { |
e17d9b2d | 674 | zlog_err( |
75829703 | 675 | "Invalid source prefix length: %u received from kernel route change", |
930571d2 | 676 | rtm->rtm_src_len); |
e17d9b2d | 677 | return -1; |
930571d2 | 678 | } |
d62a17ae | 679 | memcpy(&src_p.prefix, src, 16); |
680 | src_p.prefixlen = rtm->rtm_src_len; | |
681 | } | |
682 | ||
25715c7e DS |
683 | /* |
684 | * For ZEBRA_ROUTE_KERNEL types: | |
685 | * | |
686 | * The metric/priority of the route received from the kernel | |
687 | * is a 32 bit number. We are going to interpret the high | |
688 | * order byte as the Admin Distance and the low order 3 bytes | |
689 | * as the metric. | |
690 | * | |
691 | * This will allow us to do two things: | |
692 | * 1) Allow the creation of kernel routes that can be | |
693 | * overridden by zebra. | |
694 | * 2) Allow the old behavior for 'most' kernel route types | |
695 | * if a user enters 'ip route ...' v4 routes get a metric | |
696 | * of 0 and v6 routes get a metric of 1024. Both of these | |
697 | * values will end up with a admin distance of 0, which | |
698 | * will cause them to win for the purposes of zebra. | |
699 | */ | |
700 | if (proto == ZEBRA_ROUTE_KERNEL) { | |
701 | distance = (metric >> 24) & 0xFF; | |
996c9314 | 702 | metric = (metric & 0x00FFFFFF); |
25715c7e DS |
703 | } |
704 | ||
d62a17ae | 705 | if (IS_ZEBRA_DEBUG_KERNEL) { |
706 | char buf[PREFIX_STRLEN]; | |
707 | char buf2[PREFIX_STRLEN]; | |
45df4e96 | 708 | zlog_debug("%s %s%s%s vrf %u(%u) metric: %d Admin Distance: %d", |
996c9314 LB |
709 | nl_msg_type_to_str(h->nlmsg_type), |
710 | prefix2str(&p, buf, sizeof(buf)), | |
711 | src_p.prefixlen ? " from " : "", | |
712 | src_p.prefixlen | |
713 | ? prefix2str(&src_p, buf2, sizeof(buf2)) | |
714 | : "", | |
45df4e96 | 715 | vrf_id, table, metric, distance); |
d62a17ae | 716 | } |
717 | ||
718 | afi_t afi = AFI_IP; | |
719 | if (rtm->rtm_family == AF_INET6) | |
720 | afi = AFI_IP6; | |
721 | ||
722 | if (h->nlmsg_type == RTM_NEWROUTE) { | |
8795f904 | 723 | |
fd36be7e | 724 | if (!tb[RTA_MULTIPATH]) { |
77a44d94 | 725 | struct nexthop nh = {0}; |
8795f904 | 726 | |
77a44d94 SW |
727 | if (!nhe_id) { |
728 | nh = parse_nexthop_unicast( | |
729 | ns_id, rtm, tb, bh_type, index, prefsrc, | |
20822f9d | 730 | gate, afi, vrf_id); |
87da6a60 | 731 | } |
4a7371e9 | 732 | rib_add(afi, SAFI_UNICAST, vrf_id, proto, 0, flags, &p, |
8032b717 SW |
733 | &src_p, &nh, nhe_id, table, metric, mtu, |
734 | distance, tag); | |
fd36be7e | 735 | } else { |
d62a17ae | 736 | /* This is a multipath route */ |
d62a17ae | 737 | struct route_entry *re; |
0eb97b86 | 738 | struct nexthop_group *ng = NULL; |
d62a17ae | 739 | struct rtnexthop *rtnh = |
740 | (struct rtnexthop *)RTA_DATA(tb[RTA_MULTIPATH]); | |
d62a17ae | 741 | |
742 | re = XCALLOC(MTYPE_RE, sizeof(struct route_entry)); | |
915902cb | 743 | re->type = proto; |
25715c7e | 744 | re->distance = distance; |
d62a17ae | 745 | re->flags = flags; |
746 | re->metric = metric; | |
747 | re->mtu = mtu; | |
748 | re->vrf_id = vrf_id; | |
749 | re->table = table; | |
98572489 | 750 | re->uptime = monotime(NULL); |
4e40b6d6 | 751 | re->tag = tag; |
bbb322f2 | 752 | re->nhe_id = nhe_id; |
3c04071d | 753 | |
20822f9d | 754 | if (!nhe_id) { |
0eb97b86 MS |
755 | uint8_t nhop_num; |
756 | ||
757 | /* Use temporary list of nexthops; parse | |
758 | * message payload's nexthops. | |
759 | */ | |
760 | ng = nexthop_group_new(); | |
761 | nhop_num = | |
20822f9d | 762 | parse_multipath_nexthops_unicast( |
0eb97b86 | 763 | ns_id, ng, rtm, rtnh, tb, |
20822f9d SW |
764 | prefsrc, vrf_id); |
765 | ||
766 | zserv_nexthop_num_warn( | |
767 | __func__, (const struct prefix *)&p, | |
768 | nhop_num); | |
0eb97b86 MS |
769 | |
770 | if (nhop_num == 0) { | |
771 | nexthop_group_delete(&ng); | |
772 | ng = NULL; | |
773 | } | |
d62a17ae | 774 | } |
775 | ||
0eb97b86 | 776 | if (nhe_id || ng) |
1f610a1f | 777 | rib_add_multipath(afi, SAFI_UNICAST, &p, |
0eb97b86 | 778 | &src_p, re, ng); |
20822f9d SW |
779 | else |
780 | XFREE(MTYPE_RE, re); | |
d62a17ae | 781 | } |
782 | } else { | |
bc541126 SW |
783 | if (nhe_id) { |
784 | rib_delete(afi, SAFI_UNICAST, vrf_id, proto, 0, flags, | |
785 | &p, &src_p, NULL, nhe_id, table, metric, | |
786 | distance, true); | |
787 | } else { | |
788 | if (!tb[RTA_MULTIPATH]) { | |
789 | struct nexthop nh; | |
790 | size_t sz = (afi == AFI_IP) ? 4 : 16; | |
791 | ||
792 | memset(&nh, 0, sizeof(nh)); | |
793 | if (bh_type == BLACKHOLE_UNSPEC) { | |
794 | if (index && !gate) | |
795 | nh.type = NEXTHOP_TYPE_IFINDEX; | |
796 | else if (index && gate) | |
797 | nh.type = | |
798 | (afi == AFI_IP) | |
799 | ? NEXTHOP_TYPE_IPV4_IFINDEX | |
800 | : NEXTHOP_TYPE_IPV6_IFINDEX; | |
801 | else if (!index && gate) | |
802 | nh.type = | |
803 | (afi == AFI_IP) | |
804 | ? NEXTHOP_TYPE_IPV4 | |
805 | : NEXTHOP_TYPE_IPV6; | |
806 | else { | |
807 | nh.type = | |
808 | NEXTHOP_TYPE_BLACKHOLE; | |
809 | nh.bh_type = BLACKHOLE_UNSPEC; | |
810 | } | |
811 | } else { | |
8ba5bd58 | 812 | nh.type = NEXTHOP_TYPE_BLACKHOLE; |
bc541126 | 813 | nh.bh_type = bh_type; |
8ba5bd58 | 814 | } |
bc541126 SW |
815 | nh.ifindex = index; |
816 | if (gate) | |
817 | memcpy(&nh.gate, gate, sz); | |
818 | rib_delete(afi, SAFI_UNICAST, vrf_id, proto, 0, | |
819 | flags, &p, &src_p, &nh, 0, table, | |
820 | metric, distance, true); | |
8ba5bd58 | 821 | } else { |
bc541126 SW |
822 | /* XXX: need to compare the entire list of |
823 | * nexthops here for NLM_F_APPEND stupidity */ | |
824 | rib_delete(afi, SAFI_UNICAST, vrf_id, proto, 0, | |
825 | flags, &p, &src_p, NULL, 0, table, | |
826 | metric, distance, true); | |
8ba5bd58 | 827 | } |
d62a17ae | 828 | } |
829 | } | |
830 | ||
831 | return 0; | |
718e3744 | 832 | } |
833 | ||
e3be0432 DS |
834 | static struct mcast_route_data *mroute = NULL; |
835 | ||
2414abd3 | 836 | static int netlink_route_change_read_multicast(struct nlmsghdr *h, |
d62a17ae | 837 | ns_id_t ns_id, int startup) |
565fdc75 | 838 | { |
d62a17ae | 839 | int len; |
840 | struct rtmsg *rtm; | |
841 | struct rtattr *tb[RTA_MAX + 1]; | |
842 | struct mcast_route_data *m; | |
843 | struct mcast_route_data mr; | |
844 | int iif = 0; | |
845 | int count; | |
846 | int oif[256]; | |
847 | int oif_count = 0; | |
848 | char sbuf[40]; | |
849 | char gbuf[40]; | |
850 | char oif_list[256] = "\0"; | |
78dd30b2 | 851 | vrf_id_t vrf; |
43b5cc5e | 852 | int table; |
d62a17ae | 853 | |
854 | if (mroute) | |
855 | m = mroute; | |
856 | else { | |
857 | memset(&mr, 0, sizeof(mr)); | |
858 | m = &mr; | |
859 | } | |
860 | ||
861 | rtm = NLMSG_DATA(h); | |
862 | ||
863 | len = h->nlmsg_len - NLMSG_LENGTH(sizeof(struct rtmsg)); | |
864 | ||
865 | memset(tb, 0, sizeof tb); | |
866 | netlink_parse_rtattr(tb, RTA_MAX, RTM_RTA(rtm), len); | |
90d82769 | 867 | |
43b5cc5e DS |
868 | if (tb[RTA_TABLE]) |
869 | table = *(int *)RTA_DATA(tb[RTA_TABLE]); | |
870 | else | |
871 | table = rtm->rtm_table; | |
872 | ||
78dd30b2 | 873 | vrf = vrf_lookup_by_table(table, ns_id); |
43b5cc5e | 874 | |
d62a17ae | 875 | if (tb[RTA_IIF]) |
876 | iif = *(int *)RTA_DATA(tb[RTA_IIF]); | |
877 | ||
878 | if (tb[RTA_SRC]) | |
bd8b9272 | 879 | m->sg.src = *(struct in_addr *)RTA_DATA(tb[RTA_SRC]); |
d62a17ae | 880 | |
881 | if (tb[RTA_DST]) | |
bd8b9272 | 882 | m->sg.grp = *(struct in_addr *)RTA_DATA(tb[RTA_DST]); |
d62a17ae | 883 | |
62819462 | 884 | if (tb[RTA_EXPIRES]) |
d62a17ae | 885 | m->lastused = *(unsigned long long *)RTA_DATA(tb[RTA_EXPIRES]); |
886 | ||
887 | if (tb[RTA_MULTIPATH]) { | |
888 | struct rtnexthop *rtnh = | |
889 | (struct rtnexthop *)RTA_DATA(tb[RTA_MULTIPATH]); | |
890 | ||
891 | len = RTA_PAYLOAD(tb[RTA_MULTIPATH]); | |
892 | for (;;) { | |
893 | if (len < (int)sizeof(*rtnh) || rtnh->rtnh_len > len) | |
894 | break; | |
895 | ||
896 | oif[oif_count] = rtnh->rtnh_ifindex; | |
897 | oif_count++; | |
898 | ||
3c04071d SW |
899 | if (rtnh->rtnh_len == 0) |
900 | break; | |
901 | ||
d62a17ae | 902 | len -= NLMSG_ALIGN(rtnh->rtnh_len); |
903 | rtnh = RTNH_NEXT(rtnh); | |
904 | } | |
905 | } | |
906 | ||
907 | if (IS_ZEBRA_DEBUG_KERNEL) { | |
822c9af2 SW |
908 | struct interface *ifp = NULL; |
909 | struct zebra_vrf *zvrf = NULL; | |
910 | ||
0af35d90 RW |
911 | strlcpy(sbuf, inet_ntoa(m->sg.src), sizeof(sbuf)); |
912 | strlcpy(gbuf, inet_ntoa(m->sg.grp), sizeof(gbuf)); | |
d62a17ae | 913 | for (count = 0; count < oif_count; count++) { |
914 | ifp = if_lookup_by_index(oif[count], vrf); | |
915 | char temp[256]; | |
916 | ||
5b4256ca DS |
917 | sprintf(temp, "%s(%d) ", ifp ? ifp->name : "Unknown", |
918 | oif[count]); | |
eab4a5c2 | 919 | strlcat(oif_list, temp, sizeof(oif_list)); |
d62a17ae | 920 | } |
822c9af2 | 921 | zvrf = zebra_vrf_lookup_by_id(vrf); |
d62a17ae | 922 | ifp = if_lookup_by_index(iif, vrf); |
822c9af2 SW |
923 | zlog_debug( |
924 | "MCAST VRF: %s(%d) %s (%s,%s) IIF: %s(%d) OIF: %s jiffies: %lld", | |
925 | (zvrf ? zvrf->vrf->name : "Unknown"), vrf, | |
926 | nl_msg_type_to_str(h->nlmsg_type), sbuf, gbuf, | |
927 | ifp ? ifp->name : "Unknown", iif, oif_list, | |
928 | m->lastused); | |
90d82769 | 929 | } |
d62a17ae | 930 | return 0; |
565fdc75 DS |
931 | } |
932 | ||
2414abd3 | 933 | int netlink_route_change(struct nlmsghdr *h, ns_id_t ns_id, int startup) |
565fdc75 | 934 | { |
d62a17ae | 935 | int len; |
d62a17ae | 936 | struct rtmsg *rtm; |
937 | ||
938 | rtm = NLMSG_DATA(h); | |
939 | ||
940 | if (!(h->nlmsg_type == RTM_NEWROUTE || h->nlmsg_type == RTM_DELROUTE)) { | |
941 | /* If this is not route add/delete message print warning. */ | |
9165c5f5 | 942 | zlog_debug("Kernel message: %s NS %u", |
87b5d1b0 | 943 | nl_msg_type_to_str(h->nlmsg_type), ns_id); |
d62a17ae | 944 | return 0; |
945 | } | |
946 | ||
c25e2f1a DS |
947 | if (!(rtm->rtm_family == AF_INET || |
948 | rtm->rtm_family == AF_INET6 || | |
949 | rtm->rtm_family == RTNL_FAMILY_IPMR )) { | |
9df414fe | 950 | flog_warn( |
e914ccbe | 951 | EC_ZEBRA_UNKNOWN_FAMILY, |
87b5d1b0 DS |
952 | "Invalid address family: %u received from kernel route change: %s", |
953 | rtm->rtm_family, nl_msg_type_to_str(h->nlmsg_type)); | |
8a1b681c SW |
954 | return 0; |
955 | } | |
956 | ||
d62a17ae | 957 | /* Connected route. */ |
958 | if (IS_ZEBRA_DEBUG_KERNEL) | |
78dd30b2 | 959 | zlog_debug("%s %s %s proto %s NS %u", |
d62a17ae | 960 | nl_msg_type_to_str(h->nlmsg_type), |
961 | nl_family_to_str(rtm->rtm_family), | |
962 | nl_rttype_to_str(rtm->rtm_type), | |
78dd30b2 | 963 | nl_rtproto_to_str(rtm->rtm_protocol), ns_id); |
d62a17ae | 964 | |
d62a17ae | 965 | |
966 | len = h->nlmsg_len - NLMSG_LENGTH(sizeof(struct rtmsg)); | |
9bdf8618 DS |
967 | if (len < 0) { |
968 | zlog_err("%s: Message received from netlink is of a broken size: %d %zu", | |
969 | __PRETTY_FUNCTION__, | |
970 | h->nlmsg_len, | |
971 | (size_t)NLMSG_LENGTH(sizeof(struct rtmsg))); | |
d62a17ae | 972 | return -1; |
9bdf8618 | 973 | } |
d62a17ae | 974 | |
e655a03c | 975 | if (rtm->rtm_type == RTN_MULTICAST) |
2414abd3 | 976 | netlink_route_change_read_multicast(h, ns_id, startup); |
e655a03c | 977 | else |
2414abd3 | 978 | netlink_route_change_read_unicast(h, ns_id, startup); |
d62a17ae | 979 | return 0; |
565fdc75 DS |
980 | } |
981 | ||
289602d7 | 982 | /* Request for specific route information from the kernel */ |
d62a17ae | 983 | static int netlink_request_route(struct zebra_ns *zns, int family, int type) |
289602d7 | 984 | { |
d62a17ae | 985 | struct { |
986 | struct nlmsghdr n; | |
987 | struct rtmsg rtm; | |
988 | } req; | |
989 | ||
990 | /* Form the request, specifying filter (rtattr) if needed. */ | |
991 | memset(&req, 0, sizeof(req)); | |
992 | req.n.nlmsg_type = type; | |
718f9b0f | 993 | req.n.nlmsg_flags = NLM_F_ROOT | NLM_F_MATCH | NLM_F_REQUEST; |
d62a17ae | 994 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)); |
995 | req.rtm.rtm_family = family; | |
996 | ||
997 | return netlink_request(&zns->netlink_cmd, &req.n); | |
289602d7 | 998 | } |
999 | ||
718e3744 | 1000 | /* Routing table read function using netlink interface. Only called |
1001 | bootstrap time. */ | |
d62a17ae | 1002 | int netlink_route_read(struct zebra_ns *zns) |
718e3744 | 1003 | { |
d62a17ae | 1004 | int ret; |
85a75f1e MS |
1005 | struct zebra_dplane_info dp_info; |
1006 | ||
1007 | zebra_dplane_info_from_zns(&dp_info, zns, true /*is_cmd*/); | |
d62a17ae | 1008 | |
1009 | /* Get IPv4 routing table. */ | |
1010 | ret = netlink_request_route(zns, AF_INET, RTM_GETROUTE); | |
1011 | if (ret < 0) | |
1012 | return ret; | |
1013 | ret = netlink_parse_info(netlink_route_change_read_unicast, | |
85a75f1e | 1014 | &zns->netlink_cmd, &dp_info, 0, 1); |
d62a17ae | 1015 | if (ret < 0) |
1016 | return ret; | |
1017 | ||
1018 | /* Get IPv6 routing table. */ | |
1019 | ret = netlink_request_route(zns, AF_INET6, RTM_GETROUTE); | |
1020 | if (ret < 0) | |
1021 | return ret; | |
1022 | ret = netlink_parse_info(netlink_route_change_read_unicast, | |
85a75f1e | 1023 | &zns->netlink_cmd, &dp_info, 0, 1); |
d62a17ae | 1024 | if (ret < 0) |
1025 | return ret; | |
1026 | ||
1027 | return 0; | |
718e3744 | 1028 | } |
1029 | ||
d7c0a89a QY |
1030 | static void _netlink_route_nl_add_gateway_info(uint8_t route_family, |
1031 | uint8_t gw_family, | |
d62a17ae | 1032 | struct nlmsghdr *nlmsg, |
1033 | size_t req_size, int bytelen, | |
81793ac1 | 1034 | const struct nexthop *nexthop) |
40c7bdb0 | 1035 | { |
d62a17ae | 1036 | if (route_family == AF_MPLS) { |
1037 | struct gw_family_t gw_fam; | |
1038 | ||
1039 | gw_fam.family = gw_family; | |
1040 | if (gw_family == AF_INET) | |
1041 | memcpy(&gw_fam.gate.ipv4, &nexthop->gate.ipv4, bytelen); | |
1042 | else | |
1043 | memcpy(&gw_fam.gate.ipv6, &nexthop->gate.ipv6, bytelen); | |
1044 | addattr_l(nlmsg, req_size, RTA_VIA, &gw_fam.family, | |
1045 | bytelen + 2); | |
1046 | } else { | |
1047 | if (gw_family == AF_INET) | |
1048 | addattr_l(nlmsg, req_size, RTA_GATEWAY, | |
1049 | &nexthop->gate.ipv4, bytelen); | |
1050 | else | |
1051 | addattr_l(nlmsg, req_size, RTA_GATEWAY, | |
1052 | &nexthop->gate.ipv6, bytelen); | |
1053 | } | |
40c7bdb0 | 1054 | } |
1055 | ||
d7c0a89a QY |
1056 | static void _netlink_route_rta_add_gateway_info(uint8_t route_family, |
1057 | uint8_t gw_family, | |
d62a17ae | 1058 | struct rtattr *rta, |
1059 | struct rtnexthop *rtnh, | |
1060 | size_t req_size, int bytelen, | |
81793ac1 | 1061 | const struct nexthop *nexthop) |
40c7bdb0 | 1062 | { |
d62a17ae | 1063 | if (route_family == AF_MPLS) { |
1064 | struct gw_family_t gw_fam; | |
1065 | ||
1066 | gw_fam.family = gw_family; | |
1067 | if (gw_family == AF_INET) | |
1068 | memcpy(&gw_fam.gate.ipv4, &nexthop->gate.ipv4, bytelen); | |
1069 | else | |
1070 | memcpy(&gw_fam.gate.ipv6, &nexthop->gate.ipv6, bytelen); | |
1071 | rta_addattr_l(rta, req_size, RTA_VIA, &gw_fam.family, | |
1072 | bytelen + 2); | |
1073 | rtnh->rtnh_len += RTA_LENGTH(bytelen + 2); | |
1074 | } else { | |
1075 | if (gw_family == AF_INET) | |
1076 | rta_addattr_l(rta, req_size, RTA_GATEWAY, | |
1077 | &nexthop->gate.ipv4, bytelen); | |
1078 | else | |
1079 | rta_addattr_l(rta, req_size, RTA_GATEWAY, | |
1080 | &nexthop->gate.ipv6, bytelen); | |
1081 | rtnh->rtnh_len += sizeof(struct rtattr) + bytelen; | |
1082 | } | |
40c7bdb0 | 1083 | } |
1084 | ||
b7537db6 SW |
1085 | static int build_label_stack(struct mpls_label_stack *nh_label, |
1086 | mpls_lse_t *out_lse, char *label_buf, | |
1087 | size_t label_buf_size) | |
1088 | { | |
1089 | char label_buf1[20]; | |
1090 | int num_labels = 0; | |
1091 | ||
1092 | for (int i = 0; nh_label && i < nh_label->num_labels; i++) { | |
1093 | if (nh_label->label[i] == MPLS_LABEL_IMPLICIT_NULL) | |
1094 | continue; | |
1095 | ||
1096 | if (IS_ZEBRA_DEBUG_KERNEL) { | |
1097 | if (!num_labels) | |
1098 | sprintf(label_buf, "label %u", | |
1099 | nh_label->label[i]); | |
1100 | else { | |
1101 | sprintf(label_buf1, "/%u", nh_label->label[i]); | |
1102 | strlcat(label_buf, label_buf1, label_buf_size); | |
1103 | } | |
1104 | } | |
1105 | ||
1106 | out_lse[num_labels] = | |
1107 | mpls_lse_encode(nh_label->label[i], 0, 0, 0); | |
1108 | num_labels++; | |
1109 | } | |
1110 | ||
1111 | return num_labels; | |
1112 | } | |
1113 | ||
fa713d9e CF |
1114 | /* This function takes a nexthop as argument and adds |
1115 | * the appropriate netlink attributes to an existing | |
1116 | * netlink message. | |
1117 | * | |
1118 | * @param routedesc: Human readable description of route type | |
1119 | * (direct/recursive, single-/multipath) | |
1120 | * @param bytelen: Length of addresses in bytes. | |
1121 | * @param nexthop: Nexthop information | |
1122 | * @param nlmsg: nlmsghdr structure to fill in. | |
1123 | * @param req_size: The size allocated for the message. | |
1124 | */ | |
d62a17ae | 1125 | static void _netlink_route_build_singlepath(const char *routedesc, int bytelen, |
81793ac1 | 1126 | const struct nexthop *nexthop, |
d62a17ae | 1127 | struct nlmsghdr *nlmsg, |
1128 | struct rtmsg *rtmsg, | |
1129 | size_t req_size, int cmd) | |
fa713d9e | 1130 | { |
b7537db6 | 1131 | |
d62a17ae | 1132 | mpls_lse_t out_lse[MPLS_MAX_LABELS]; |
9a62e84b | 1133 | char label_buf[256]; |
b7537db6 SW |
1134 | int num_labels = 0; |
1135 | ||
1136 | assert(nexthop); | |
d62a17ae | 1137 | |
1138 | /* | |
1139 | * label_buf is *only* currently used within debugging. | |
1140 | * As such when we assign it we are guarding it inside | |
1141 | * a debug test. If you want to change this make sure | |
1142 | * you fix this assumption | |
1143 | */ | |
1144 | label_buf[0] = '\0'; | |
d62a17ae | 1145 | |
b7537db6 SW |
1146 | num_labels = build_label_stack(nexthop->nh_label, out_lse, label_buf, |
1147 | sizeof(label_buf)); | |
fa712963 RW |
1148 | |
1149 | if (num_labels) { | |
1150 | /* Set the BoS bit */ | |
1151 | out_lse[num_labels - 1] |= htonl(1 << MPLS_LS_S_SHIFT); | |
1152 | ||
1153 | if (rtmsg->rtm_family == AF_MPLS) | |
1154 | addattr_l(nlmsg, req_size, RTA_NEWDST, &out_lse, | |
1155 | num_labels * sizeof(mpls_lse_t)); | |
1156 | else { | |
1157 | struct rtattr *nest; | |
d7c0a89a | 1158 | uint16_t encap = LWTUNNEL_ENCAP_MPLS; |
fa712963 RW |
1159 | |
1160 | addattr_l(nlmsg, req_size, RTA_ENCAP_TYPE, &encap, | |
d7c0a89a | 1161 | sizeof(uint16_t)); |
fa712963 RW |
1162 | nest = addattr_nest(nlmsg, req_size, RTA_ENCAP); |
1163 | addattr_l(nlmsg, req_size, MPLS_IPTUNNEL_DST, &out_lse, | |
1164 | num_labels * sizeof(mpls_lse_t)); | |
1165 | addattr_nest_end(nlmsg, nest); | |
66d42727 | 1166 | } |
0aabccc0 | 1167 | } |
fa713d9e | 1168 | |
d62a17ae | 1169 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ONLINK)) |
1170 | rtmsg->rtm_flags |= RTNH_F_ONLINK; | |
1171 | ||
1172 | if (rtmsg->rtm_family == AF_INET | |
1173 | && (nexthop->type == NEXTHOP_TYPE_IPV6 | |
1174 | || nexthop->type == NEXTHOP_TYPE_IPV6_IFINDEX)) { | |
1175 | rtmsg->rtm_flags |= RTNH_F_ONLINK; | |
1176 | addattr_l(nlmsg, req_size, RTA_GATEWAY, &ipv4_ll, 4); | |
1177 | addattr32(nlmsg, req_size, RTA_OIF, nexthop->ifindex); | |
1178 | ||
1179 | if (nexthop->rmap_src.ipv4.s_addr && (cmd == RTM_NEWROUTE)) | |
1180 | addattr_l(nlmsg, req_size, RTA_PREFSRC, | |
1181 | &nexthop->rmap_src.ipv4, bytelen); | |
1182 | else if (nexthop->src.ipv4.s_addr && (cmd == RTM_NEWROUTE)) | |
1183 | addattr_l(nlmsg, req_size, RTA_PREFSRC, | |
1184 | &nexthop->src.ipv4, bytelen); | |
1185 | ||
1186 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1187 | zlog_debug( | |
1188 | " 5549: _netlink_route_build_singlepath() (%s): " | |
7556c3fd | 1189 | "nexthop via %s %s if %u(%u)", |
d62a17ae | 1190 | routedesc, ipv4_ll_buf, label_buf, |
7556c3fd | 1191 | nexthop->ifindex, nexthop->vrf_id); |
d62a17ae | 1192 | return; |
0aabccc0 DD |
1193 | } |
1194 | ||
d62a17ae | 1195 | if (nexthop->type == NEXTHOP_TYPE_IPV4 |
1196 | || nexthop->type == NEXTHOP_TYPE_IPV4_IFINDEX) { | |
1197 | /* Send deletes to the kernel without specifying the next-hop */ | |
1198 | if (cmd != RTM_DELROUTE) | |
1199 | _netlink_route_nl_add_gateway_info( | |
1200 | rtmsg->rtm_family, AF_INET, nlmsg, req_size, | |
1201 | bytelen, nexthop); | |
1202 | ||
1203 | if (cmd == RTM_NEWROUTE) { | |
1204 | if (nexthop->rmap_src.ipv4.s_addr) | |
1205 | addattr_l(nlmsg, req_size, RTA_PREFSRC, | |
1206 | &nexthop->rmap_src.ipv4, bytelen); | |
1207 | else if (nexthop->src.ipv4.s_addr) | |
1208 | addattr_l(nlmsg, req_size, RTA_PREFSRC, | |
1209 | &nexthop->src.ipv4, bytelen); | |
1210 | } | |
1211 | ||
1212 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1213 | zlog_debug( | |
1214 | "netlink_route_multipath() (%s): " | |
7556c3fd | 1215 | "nexthop via %s %s if %u(%u)", |
d62a17ae | 1216 | routedesc, inet_ntoa(nexthop->gate.ipv4), |
7556c3fd | 1217 | label_buf, nexthop->ifindex, nexthop->vrf_id); |
0aabccc0 | 1218 | } |
fa713d9e | 1219 | |
d62a17ae | 1220 | if (nexthop->type == NEXTHOP_TYPE_IPV6 |
1221 | || nexthop->type == NEXTHOP_TYPE_IPV6_IFINDEX) { | |
1222 | _netlink_route_nl_add_gateway_info(rtmsg->rtm_family, AF_INET6, | |
1223 | nlmsg, req_size, bytelen, | |
1224 | nexthop); | |
1225 | ||
1226 | if (cmd == RTM_NEWROUTE) { | |
1227 | if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->rmap_src.ipv6)) | |
1228 | addattr_l(nlmsg, req_size, RTA_PREFSRC, | |
1229 | &nexthop->rmap_src.ipv6, bytelen); | |
1230 | else if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->src.ipv6)) | |
1231 | addattr_l(nlmsg, req_size, RTA_PREFSRC, | |
1232 | &nexthop->src.ipv6, bytelen); | |
1233 | } | |
fa713d9e | 1234 | |
d62a17ae | 1235 | if (IS_ZEBRA_DEBUG_KERNEL) |
1236 | zlog_debug( | |
1237 | "netlink_route_multipath() (%s): " | |
7556c3fd | 1238 | "nexthop via %s %s if %u(%u)", |
d62a17ae | 1239 | routedesc, inet6_ntoa(nexthop->gate.ipv6), |
7556c3fd | 1240 | label_buf, nexthop->ifindex, nexthop->vrf_id); |
d62a17ae | 1241 | } |
5e210522 DS |
1242 | |
1243 | /* | |
1244 | * We have the ifindex so we should always send it | |
1245 | * This is especially useful if we are doing route | |
1246 | * leaking. | |
1247 | */ | |
1248 | if (nexthop->type != NEXTHOP_TYPE_BLACKHOLE) | |
d62a17ae | 1249 | addattr32(nlmsg, req_size, RTA_OIF, nexthop->ifindex); |
1250 | ||
275565fb | 1251 | if (nexthop->type == NEXTHOP_TYPE_IFINDEX) { |
d62a17ae | 1252 | if (cmd == RTM_NEWROUTE) { |
1253 | if (nexthop->rmap_src.ipv4.s_addr) | |
1254 | addattr_l(nlmsg, req_size, RTA_PREFSRC, | |
1255 | &nexthop->rmap_src.ipv4, bytelen); | |
1256 | else if (nexthop->src.ipv4.s_addr) | |
1257 | addattr_l(nlmsg, req_size, RTA_PREFSRC, | |
1258 | &nexthop->src.ipv4, bytelen); | |
1259 | } | |
fa713d9e | 1260 | |
d62a17ae | 1261 | if (IS_ZEBRA_DEBUG_KERNEL) |
1262 | zlog_debug( | |
1263 | "netlink_route_multipath() (%s): " | |
7556c3fd DS |
1264 | "nexthop via if %u(%u)", |
1265 | routedesc, nexthop->ifindex, nexthop->vrf_id); | |
0aabccc0 | 1266 | } |
fa713d9e CF |
1267 | } |
1268 | ||
1269 | /* This function takes a nexthop as argument and | |
1270 | * appends to the given rtattr/rtnexthop pair the | |
1271 | * representation of the nexthop. If the nexthop | |
1272 | * defines a preferred source, the src parameter | |
1273 | * will be modified to point to that src, otherwise | |
1274 | * it will be kept unmodified. | |
1275 | * | |
1276 | * @param routedesc: Human readable description of route type | |
1277 | * (direct/recursive, single-/multipath) | |
1278 | * @param bytelen: Length of addresses in bytes. | |
1279 | * @param nexthop: Nexthop information | |
1280 | * @param rta: rtnetlink attribute structure | |
1281 | * @param rtnh: pointer to an rtnetlink nexthop structure | |
1282 | * @param src: pointer pointing to a location where | |
1283 | * the prefsrc should be stored. | |
1284 | */ | |
d62a17ae | 1285 | static void _netlink_route_build_multipath(const char *routedesc, int bytelen, |
81793ac1 | 1286 | const struct nexthop *nexthop, |
d62a17ae | 1287 | struct rtattr *rta, |
1288 | struct rtnexthop *rtnh, | |
1289 | struct rtmsg *rtmsg, | |
81793ac1 | 1290 | const union g_addr **src) |
fa713d9e | 1291 | { |
d62a17ae | 1292 | mpls_lse_t out_lse[MPLS_MAX_LABELS]; |
9a62e84b | 1293 | char label_buf[256]; |
b7537db6 | 1294 | int num_labels = 0; |
d62a17ae | 1295 | |
1296 | rtnh->rtnh_len = sizeof(*rtnh); | |
1297 | rtnh->rtnh_flags = 0; | |
1298 | rtnh->rtnh_hops = 0; | |
1299 | rta->rta_len += rtnh->rtnh_len; | |
1300 | ||
b7537db6 SW |
1301 | assert(nexthop); |
1302 | ||
d62a17ae | 1303 | /* |
1304 | * label_buf is *only* currently used within debugging. | |
1305 | * As such when we assign it we are guarding it inside | |
1306 | * a debug test. If you want to change this make sure | |
1307 | * you fix this assumption | |
1308 | */ | |
1309 | label_buf[0] = '\0'; | |
d62a17ae | 1310 | |
b7537db6 SW |
1311 | num_labels = build_label_stack(nexthop->nh_label, out_lse, label_buf, |
1312 | sizeof(label_buf)); | |
fa712963 RW |
1313 | |
1314 | if (num_labels) { | |
1315 | /* Set the BoS bit */ | |
1316 | out_lse[num_labels - 1] |= htonl(1 << MPLS_LS_S_SHIFT); | |
1317 | ||
1318 | if (rtmsg->rtm_family == AF_MPLS) { | |
1319 | rta_addattr_l(rta, NL_PKT_BUF_SIZE, RTA_NEWDST, | |
1320 | &out_lse, | |
1321 | num_labels * sizeof(mpls_lse_t)); | |
1322 | rtnh->rtnh_len += | |
1323 | RTA_LENGTH(num_labels * sizeof(mpls_lse_t)); | |
1324 | } else { | |
1325 | struct rtattr *nest; | |
d7c0a89a | 1326 | uint16_t encap = LWTUNNEL_ENCAP_MPLS; |
fa712963 RW |
1327 | int len = rta->rta_len; |
1328 | ||
1329 | rta_addattr_l(rta, NL_PKT_BUF_SIZE, RTA_ENCAP_TYPE, | |
d7c0a89a | 1330 | &encap, sizeof(uint16_t)); |
fa712963 RW |
1331 | nest = rta_nest(rta, NL_PKT_BUF_SIZE, RTA_ENCAP); |
1332 | rta_addattr_l(rta, NL_PKT_BUF_SIZE, MPLS_IPTUNNEL_DST, | |
1333 | &out_lse, | |
1334 | num_labels * sizeof(mpls_lse_t)); | |
1335 | rta_nest_end(rta, nest); | |
1336 | rtnh->rtnh_len += rta->rta_len - len; | |
66d42727 | 1337 | } |
d62a17ae | 1338 | } |
1339 | ||
1340 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ONLINK)) | |
1341 | rtnh->rtnh_flags |= RTNH_F_ONLINK; | |
1342 | ||
1343 | if (rtmsg->rtm_family == AF_INET | |
1344 | && (nexthop->type == NEXTHOP_TYPE_IPV6 | |
1345 | || nexthop->type == NEXTHOP_TYPE_IPV6_IFINDEX)) { | |
1346 | bytelen = 4; | |
1347 | rtnh->rtnh_flags |= RTNH_F_ONLINK; | |
1348 | rta_addattr_l(rta, NL_PKT_BUF_SIZE, RTA_GATEWAY, &ipv4_ll, | |
1349 | bytelen); | |
1350 | rtnh->rtnh_len += sizeof(struct rtattr) + bytelen; | |
1351 | rtnh->rtnh_ifindex = nexthop->ifindex; | |
1352 | ||
1353 | if (nexthop->rmap_src.ipv4.s_addr) | |
1354 | *src = &nexthop->rmap_src; | |
1355 | else if (nexthop->src.ipv4.s_addr) | |
1356 | *src = &nexthop->src; | |
1357 | ||
1358 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1359 | zlog_debug( | |
1360 | " 5549: netlink_route_build_multipath() (%s): " | |
1361 | "nexthop via %s %s if %u", | |
1362 | routedesc, ipv4_ll_buf, label_buf, | |
1363 | nexthop->ifindex); | |
1364 | return; | |
1365 | } | |
1366 | ||
1367 | if (nexthop->type == NEXTHOP_TYPE_IPV4 | |
1368 | || nexthop->type == NEXTHOP_TYPE_IPV4_IFINDEX) { | |
1369 | _netlink_route_rta_add_gateway_info(rtmsg->rtm_family, AF_INET, | |
1370 | rta, rtnh, NL_PKT_BUF_SIZE, | |
1371 | bytelen, nexthop); | |
1372 | if (nexthop->rmap_src.ipv4.s_addr) | |
1373 | *src = &nexthop->rmap_src; | |
1374 | else if (nexthop->src.ipv4.s_addr) | |
1375 | *src = &nexthop->src; | |
1376 | ||
1377 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1378 | zlog_debug( | |
1379 | "netlink_route_multipath() (%s): " | |
1380 | "nexthop via %s %s if %u", | |
1381 | routedesc, inet_ntoa(nexthop->gate.ipv4), | |
1382 | label_buf, nexthop->ifindex); | |
1383 | } | |
1384 | if (nexthop->type == NEXTHOP_TYPE_IPV6 | |
1385 | || nexthop->type == NEXTHOP_TYPE_IPV6_IFINDEX) { | |
1386 | _netlink_route_rta_add_gateway_info(rtmsg->rtm_family, AF_INET6, | |
1387 | rta, rtnh, NL_PKT_BUF_SIZE, | |
1388 | bytelen, nexthop); | |
1389 | ||
1390 | if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->rmap_src.ipv6)) | |
1391 | *src = &nexthop->rmap_src; | |
1392 | else if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->src.ipv6)) | |
1393 | *src = &nexthop->src; | |
1394 | ||
1395 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1396 | zlog_debug( | |
1397 | "netlink_route_multipath() (%s): " | |
1398 | "nexthop via %s %s if %u", | |
1399 | routedesc, inet6_ntoa(nexthop->gate.ipv6), | |
1400 | label_buf, nexthop->ifindex); | |
1401 | } | |
5e210522 DS |
1402 | |
1403 | /* | |
1404 | * We have figured out the ifindex so we should always send it | |
1405 | * This is especially useful if we are doing route | |
1406 | * leaking. | |
1407 | */ | |
1408 | if (nexthop->type != NEXTHOP_TYPE_BLACKHOLE) | |
1409 | rtnh->rtnh_ifindex = nexthop->ifindex; | |
1410 | ||
d62a17ae | 1411 | /* ifindex */ |
275565fb | 1412 | if (nexthop->type == NEXTHOP_TYPE_IFINDEX) { |
d62a17ae | 1413 | if (nexthop->rmap_src.ipv4.s_addr) |
1414 | *src = &nexthop->rmap_src; | |
1415 | else if (nexthop->src.ipv4.s_addr) | |
1416 | *src = &nexthop->src; | |
1417 | ||
1418 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1419 | zlog_debug( | |
1420 | "netlink_route_multipath() (%s): " | |
1421 | "nexthop via if %u", | |
1422 | routedesc, nexthop->ifindex); | |
d62a17ae | 1423 | } |
df7fb580 DS |
1424 | |
1425 | if (nexthop->weight) | |
1426 | rtnh->rtnh_hops = nexthop->weight - 1; | |
fa713d9e CF |
1427 | } |
1428 | ||
d62a17ae | 1429 | static inline void _netlink_mpls_build_singlepath(const char *routedesc, |
81793ac1 | 1430 | const zebra_nhlfe_t *nhlfe, |
d62a17ae | 1431 | struct nlmsghdr *nlmsg, |
1432 | struct rtmsg *rtmsg, | |
1433 | size_t req_size, int cmd) | |
40c7bdb0 | 1434 | { |
d62a17ae | 1435 | int bytelen; |
d7c0a89a | 1436 | uint8_t family; |
40c7bdb0 | 1437 | |
d62a17ae | 1438 | family = NHLFE_FAMILY(nhlfe); |
1439 | bytelen = (family == AF_INET ? 4 : 16); | |
1440 | _netlink_route_build_singlepath(routedesc, bytelen, nhlfe->nexthop, | |
1441 | nlmsg, rtmsg, req_size, cmd); | |
40c7bdb0 | 1442 | } |
1443 | ||
1444 | ||
1445 | static inline void | |
81793ac1 | 1446 | _netlink_mpls_build_multipath(const char *routedesc, const zebra_nhlfe_t *nhlfe, |
d62a17ae | 1447 | struct rtattr *rta, struct rtnexthop *rtnh, |
81793ac1 | 1448 | struct rtmsg *rtmsg, const union g_addr **src) |
40c7bdb0 | 1449 | { |
d62a17ae | 1450 | int bytelen; |
d7c0a89a | 1451 | uint8_t family; |
40c7bdb0 | 1452 | |
d62a17ae | 1453 | family = NHLFE_FAMILY(nhlfe); |
1454 | bytelen = (family == AF_INET ? 4 : 16); | |
1455 | _netlink_route_build_multipath(routedesc, bytelen, nhlfe->nexthop, rta, | |
1456 | rtnh, rtmsg, src); | |
40c7bdb0 | 1457 | } |
1458 | ||
1459 | ||
fa713d9e CF |
1460 | /* Log debug information for netlink_route_multipath |
1461 | * if debug logging is enabled. | |
1462 | * | |
1463 | * @param cmd: Netlink command which is to be processed | |
1464 | * @param p: Prefix for which the change is due | |
fa713d9e | 1465 | * @param family: Address family which the change concerns |
45df4e96 DS |
1466 | * @param zvrf: The vrf we are in |
1467 | * @param tableid: The table we are working on | |
fa713d9e | 1468 | */ |
86391e56 MS |
1469 | static void _netlink_route_debug(int cmd, const struct prefix *p, |
1470 | int family, vrf_id_t vrfid, | |
7556c3fd | 1471 | uint32_t tableid) |
fa713d9e | 1472 | { |
d62a17ae | 1473 | if (IS_ZEBRA_DEBUG_KERNEL) { |
1474 | char buf[PREFIX_STRLEN]; | |
1475 | zlog_debug( | |
45df4e96 DS |
1476 | "netlink_route_multipath(): %s %s vrf %u(%u)", |
1477 | nl_msg_type_to_str(cmd), | |
1478 | prefix2str(p, buf, sizeof(buf)), | |
86391e56 | 1479 | vrfid, tableid); |
d62a17ae | 1480 | } |
1481 | } | |
1482 | ||
e8968ccb SW |
1483 | static void _netlink_nexthop_debug(int cmd, uint32_t id) |
1484 | { | |
1485 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1486 | zlog_debug("netlink_nexthop(): %s, id=%u", | |
1487 | nl_msg_type_to_str(cmd), id); | |
1488 | } | |
1489 | ||
d7c0a89a | 1490 | static void _netlink_mpls_debug(int cmd, uint32_t label, const char *routedesc) |
40c7bdb0 | 1491 | { |
d62a17ae | 1492 | if (IS_ZEBRA_DEBUG_KERNEL) |
1493 | zlog_debug("netlink_mpls_multipath() (%s): %s %u/20", routedesc, | |
1494 | nl_msg_type_to_str(cmd), label); | |
fa713d9e CF |
1495 | } |
1496 | ||
d62a17ae | 1497 | static int netlink_neigh_update(int cmd, int ifindex, uint32_t addr, char *lla, |
5895d33f | 1498 | int llalen, ns_id_t ns_id) |
5c610faf | 1499 | { |
f3dbec60 | 1500 | uint8_t protocol = RTPROT_ZEBRA; |
d62a17ae | 1501 | struct { |
1502 | struct nlmsghdr n; | |
1503 | struct ndmsg ndm; | |
1504 | char buf[256]; | |
1505 | } req; | |
5c610faf | 1506 | |
5895d33f | 1507 | struct zebra_ns *zns = zebra_ns_lookup(ns_id); |
8f7d9fc0 | 1508 | |
5605ecfc | 1509 | memset(&req, 0, sizeof(req)); |
5c610faf | 1510 | |
d62a17ae | 1511 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)); |
1512 | req.n.nlmsg_flags = NLM_F_CREATE | NLM_F_REQUEST; | |
1513 | req.n.nlmsg_type = cmd; // RTM_NEWNEIGH or RTM_DELNEIGH | |
1514 | req.n.nlmsg_pid = zns->netlink_cmd.snl.nl_pid; | |
a55ba23f | 1515 | |
d62a17ae | 1516 | req.ndm.ndm_family = AF_INET; |
1517 | req.ndm.ndm_state = NUD_PERMANENT; | |
1518 | req.ndm.ndm_ifindex = ifindex; | |
1519 | req.ndm.ndm_type = RTN_UNICAST; | |
5c610faf | 1520 | |
f3dbec60 DS |
1521 | addattr_l(&req.n, sizeof(req), |
1522 | NDA_PROTOCOL, &protocol, sizeof(protocol)); | |
d62a17ae | 1523 | addattr_l(&req.n, sizeof(req), NDA_DST, &addr, 4); |
1524 | addattr_l(&req.n, sizeof(req), NDA_LLADDR, lla, llalen); | |
5c610faf | 1525 | |
d62a17ae | 1526 | return netlink_talk(netlink_talk_filter, &req.n, &zns->netlink_cmd, zns, |
1527 | 0); | |
5c610faf DS |
1528 | } |
1529 | ||
7cdb1a84 MS |
1530 | /* |
1531 | * Routing table change via netlink interface, using a dataplane context object | |
1532 | */ | |
25779064 | 1533 | static int netlink_route_multipath(int cmd, struct zebra_dplane_ctx *ctx) |
7cdb1a84 MS |
1534 | { |
1535 | int bytelen; | |
7cdb1a84 MS |
1536 | struct nexthop *nexthop = NULL; |
1537 | unsigned int nexthop_num; | |
1538 | int family; | |
1539 | const char *routedesc; | |
1540 | int setsrc = 0; | |
1541 | union g_addr src; | |
1542 | const struct prefix *p, *src_p; | |
1543 | uint32_t table_id; | |
1544 | ||
1545 | struct { | |
1546 | struct nlmsghdr n; | |
1547 | struct rtmsg r; | |
1548 | char buf[NL_PKT_BUF_SIZE]; | |
1549 | } req; | |
1550 | ||
1551 | p = dplane_ctx_get_dest(ctx); | |
1552 | src_p = dplane_ctx_get_src(ctx); | |
1553 | ||
1554 | family = PREFIX_FAMILY(p); | |
1555 | ||
5709131c | 1556 | memset(&req, 0, sizeof(req) - NL_PKT_BUF_SIZE); |
7cdb1a84 MS |
1557 | |
1558 | bytelen = (family == AF_INET ? 4 : 16); | |
1559 | ||
1560 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)); | |
1561 | req.n.nlmsg_flags = NLM_F_CREATE | NLM_F_REQUEST; | |
1562 | ||
334734a8 DS |
1563 | if ((cmd == RTM_NEWROUTE) && |
1564 | ((p->family == AF_INET) || v6_rr_semantics)) | |
1565 | req.n.nlmsg_flags |= NLM_F_REPLACE; | |
7cdb1a84 MS |
1566 | |
1567 | req.n.nlmsg_type = cmd; | |
1568 | ||
1569 | req.n.nlmsg_pid = dplane_ctx_get_ns(ctx)->nls.snl.nl_pid; | |
1570 | ||
1571 | req.r.rtm_family = family; | |
1572 | req.r.rtm_dst_len = p->prefixlen; | |
1573 | req.r.rtm_src_len = src_p ? src_p->prefixlen : 0; | |
1574 | req.r.rtm_scope = RT_SCOPE_UNIVERSE; | |
1575 | ||
5709131c | 1576 | if (cmd == RTM_DELROUTE) |
7cdb1a84 | 1577 | req.r.rtm_protocol = zebra2proto(dplane_ctx_get_old_type(ctx)); |
5709131c | 1578 | else |
7cdb1a84 | 1579 | req.r.rtm_protocol = zebra2proto(dplane_ctx_get_type(ctx)); |
7cdb1a84 MS |
1580 | |
1581 | /* | |
1582 | * blackhole routes are not RTN_UNICAST, they are | |
1583 | * RTN_ BLACKHOLE|UNREACHABLE|PROHIBIT | |
1584 | * so setting this value as a RTN_UNICAST would | |
1585 | * cause the route lookup of just the prefix | |
1586 | * to fail. So no need to specify this for | |
1587 | * the RTM_DELROUTE case | |
1588 | */ | |
1589 | if (cmd != RTM_DELROUTE) | |
1590 | req.r.rtm_type = RTN_UNICAST; | |
1591 | ||
5709131c | 1592 | addattr_l(&req.n, sizeof(req), RTA_DST, &p->u.prefix, bytelen); |
7cdb1a84 | 1593 | if (src_p) |
5709131c | 1594 | addattr_l(&req.n, sizeof(req), RTA_SRC, &src_p->u.prefix, |
7cdb1a84 MS |
1595 | bytelen); |
1596 | ||
1597 | /* Metric. */ | |
1598 | /* Hardcode the metric for all routes coming from zebra. Metric isn't | |
1599 | * used | |
1600 | * either by the kernel or by zebra. Its purely for calculating best | |
1601 | * path(s) | |
1602 | * by the routing protocol and for communicating with protocol peers. | |
1603 | */ | |
5709131c | 1604 | addattr32(&req.n, sizeof(req), RTA_PRIORITY, NL_DEFAULT_ROUTE_METRIC); |
7cdb1a84 MS |
1605 | |
1606 | #if defined(SUPPORT_REALMS) | |
1607 | { | |
1608 | route_tag_t tag; | |
1609 | ||
5709131c | 1610 | if (cmd == RTM_DELROUTE) |
7cdb1a84 | 1611 | tag = dplane_ctx_get_old_tag(ctx); |
5709131c | 1612 | else |
7cdb1a84 | 1613 | tag = dplane_ctx_get_tag(ctx); |
7cdb1a84 MS |
1614 | |
1615 | if (tag > 0 && tag <= 255) | |
5709131c | 1616 | addattr32(&req.n, sizeof(req), RTA_FLOW, tag); |
7cdb1a84 MS |
1617 | } |
1618 | #endif | |
1619 | /* Table corresponding to this route. */ | |
1620 | table_id = dplane_ctx_get_table(ctx); | |
1621 | if (table_id < 256) | |
1622 | req.r.rtm_table = table_id; | |
1623 | else { | |
1624 | req.r.rtm_table = RT_TABLE_UNSPEC; | |
5709131c | 1625 | addattr32(&req.n, sizeof(req), RTA_TABLE, table_id); |
7cdb1a84 MS |
1626 | } |
1627 | ||
1628 | _netlink_route_debug(cmd, p, family, dplane_ctx_get_vrf(ctx), table_id); | |
1629 | ||
1630 | /* | |
1631 | * If we are not updating the route and we have received | |
1632 | * a route delete, then all we need to fill in is the | |
1633 | * prefix information to tell the kernel to schwack | |
1634 | * it. | |
1635 | */ | |
1636 | if (cmd == RTM_DELROUTE) | |
1637 | goto skip; | |
1638 | ||
1639 | if (dplane_ctx_get_mtu(ctx) || dplane_ctx_get_nh_mtu(ctx)) { | |
1640 | char buf[NL_PKT_BUF_SIZE]; | |
1641 | struct rtattr *rta = (void *)buf; | |
1642 | uint32_t mtu = dplane_ctx_get_mtu(ctx); | |
1643 | uint32_t nexthop_mtu = dplane_ctx_get_nh_mtu(ctx); | |
5709131c | 1644 | |
7cdb1a84 MS |
1645 | if (!mtu || (nexthop_mtu && nexthop_mtu < mtu)) |
1646 | mtu = nexthop_mtu; | |
1647 | rta->rta_type = RTA_METRICS; | |
1648 | rta->rta_len = RTA_LENGTH(0); | |
5709131c MS |
1649 | rta_addattr_l(rta, NL_PKT_BUF_SIZE, |
1650 | RTAX_MTU, &mtu, sizeof(mtu)); | |
7cdb1a84 MS |
1651 | addattr_l(&req.n, NL_PKT_BUF_SIZE, RTA_METRICS, RTA_DATA(rta), |
1652 | RTA_PAYLOAD(rta)); | |
1653 | } | |
1654 | ||
81505946 | 1655 | if (supports_nh) { |
de3f5488 SW |
1656 | /* Kernel supports nexthop objects */ |
1657 | addattr32(&req.n, sizeof(req), RTA_NH_ID, | |
1658 | dplane_ctx_get_nhe_id(ctx)); | |
1659 | goto skip; | |
1660 | } | |
1661 | ||
7cdb1a84 | 1662 | /* Count overall nexthops so we can decide whether to use singlepath |
5709131c MS |
1663 | * or multipath case. |
1664 | */ | |
7cdb1a84 MS |
1665 | nexthop_num = 0; |
1666 | for (ALL_NEXTHOPS_PTR(dplane_ctx_get_ng(ctx), nexthop)) { | |
1667 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_RECURSIVE)) | |
1668 | continue; | |
1669 | if (cmd == RTM_NEWROUTE && !NEXTHOP_IS_ACTIVE(nexthop->flags)) | |
1670 | continue; | |
1671 | ||
1672 | nexthop_num++; | |
1673 | } | |
1674 | ||
1675 | /* Singlepath case. */ | |
220f0f42 | 1676 | if (nexthop_num == 1) { |
7cdb1a84 MS |
1677 | nexthop_num = 0; |
1678 | for (ALL_NEXTHOPS_PTR(dplane_ctx_get_ng(ctx), nexthop)) { | |
1679 | /* | |
1680 | * So we want to cover 2 types of blackhole | |
1681 | * routes here: | |
1682 | * 1) A normal blackhole route( ala from a static | |
1683 | * install. | |
1684 | * 2) A recursively resolved blackhole route | |
1685 | */ | |
1686 | if (nexthop->type == NEXTHOP_TYPE_BLACKHOLE) { | |
1687 | switch (nexthop->bh_type) { | |
1688 | case BLACKHOLE_ADMINPROHIB: | |
1689 | req.r.rtm_type = RTN_PROHIBIT; | |
1690 | break; | |
1691 | case BLACKHOLE_REJECT: | |
1692 | req.r.rtm_type = RTN_UNREACHABLE; | |
1693 | break; | |
1694 | default: | |
1695 | req.r.rtm_type = RTN_BLACKHOLE; | |
1696 | break; | |
1697 | } | |
1698 | goto skip; | |
1699 | } | |
1700 | if (CHECK_FLAG(nexthop->flags, | |
1701 | NEXTHOP_FLAG_RECURSIVE)) { | |
5709131c MS |
1702 | |
1703 | if (setsrc) | |
1704 | continue; | |
1705 | ||
1706 | if (family == AF_INET) { | |
1707 | if (nexthop->rmap_src.ipv4.s_addr | |
1708 | != 0) { | |
1709 | src.ipv4 = | |
1710 | nexthop->rmap_src.ipv4; | |
1711 | setsrc = 1; | |
1712 | } else if (nexthop->src.ipv4.s_addr | |
1713 | != 0) { | |
1714 | src.ipv4 = | |
1715 | nexthop->src.ipv4; | |
1716 | setsrc = 1; | |
1717 | } | |
1718 | } else if (family == AF_INET6) { | |
1719 | if (!IN6_IS_ADDR_UNSPECIFIED( | |
1720 | &nexthop->rmap_src.ipv6)) { | |
1721 | src.ipv6 = | |
1722 | nexthop->rmap_src.ipv6; | |
1723 | setsrc = 1; | |
1724 | } else if ( | |
1725 | !IN6_IS_ADDR_UNSPECIFIED( | |
1726 | &nexthop->src.ipv6)) { | |
1727 | src.ipv6 = | |
1728 | nexthop->src.ipv6; | |
1729 | setsrc = 1; | |
7cdb1a84 MS |
1730 | } |
1731 | } | |
f183e380 | 1732 | continue; |
7cdb1a84 MS |
1733 | } |
1734 | ||
1735 | if ((cmd == RTM_NEWROUTE | |
1736 | && NEXTHOP_IS_ACTIVE(nexthop->flags))) { | |
1737 | routedesc = nexthop->rparent | |
1738 | ? "recursive, single-path" | |
1739 | : "single-path"; | |
1740 | ||
1741 | _netlink_route_build_singlepath( | |
1742 | routedesc, bytelen, nexthop, &req.n, | |
5709131c | 1743 | &req.r, sizeof(req), cmd); |
7cdb1a84 MS |
1744 | nexthop_num++; |
1745 | break; | |
1746 | } | |
1747 | } | |
1748 | if (setsrc && (cmd == RTM_NEWROUTE)) { | |
1749 | if (family == AF_INET) | |
5709131c | 1750 | addattr_l(&req.n, sizeof(req), RTA_PREFSRC, |
7cdb1a84 MS |
1751 | &src.ipv4, bytelen); |
1752 | else if (family == AF_INET6) | |
5709131c | 1753 | addattr_l(&req.n, sizeof(req), RTA_PREFSRC, |
7cdb1a84 MS |
1754 | &src.ipv6, bytelen); |
1755 | } | |
1756 | } else { /* Multipath case */ | |
1757 | char buf[NL_PKT_BUF_SIZE]; | |
1758 | struct rtattr *rta = (void *)buf; | |
1759 | struct rtnexthop *rtnh; | |
81793ac1 | 1760 | const union g_addr *src1 = NULL; |
7cdb1a84 MS |
1761 | |
1762 | rta->rta_type = RTA_MULTIPATH; | |
1763 | rta->rta_len = RTA_LENGTH(0); | |
1764 | rtnh = RTA_DATA(rta); | |
1765 | ||
1766 | nexthop_num = 0; | |
1767 | for (ALL_NEXTHOPS_PTR(dplane_ctx_get_ng(ctx), nexthop)) { | |
7cdb1a84 MS |
1768 | if (CHECK_FLAG(nexthop->flags, |
1769 | NEXTHOP_FLAG_RECURSIVE)) { | |
1770 | /* This only works for IPv4 now */ | |
5709131c MS |
1771 | if (setsrc) |
1772 | continue; | |
1773 | ||
1774 | if (family == AF_INET) { | |
1775 | if (nexthop->rmap_src.ipv4.s_addr | |
1776 | != 0) { | |
1777 | src.ipv4 = | |
1778 | nexthop->rmap_src.ipv4; | |
1779 | setsrc = 1; | |
1780 | } else if (nexthop->src.ipv4.s_addr | |
1781 | != 0) { | |
1782 | src.ipv4 = | |
1783 | nexthop->src.ipv4; | |
1784 | setsrc = 1; | |
1785 | } | |
1786 | } else if (family == AF_INET6) { | |
1787 | if (!IN6_IS_ADDR_UNSPECIFIED( | |
1788 | &nexthop->rmap_src.ipv6)) { | |
1789 | src.ipv6 = | |
1790 | nexthop->rmap_src.ipv6; | |
1791 | setsrc = 1; | |
1792 | } else if ( | |
1793 | !IN6_IS_ADDR_UNSPECIFIED( | |
1794 | &nexthop->src.ipv6)) { | |
1795 | src.ipv6 = | |
1796 | nexthop->src.ipv6; | |
1797 | setsrc = 1; | |
7cdb1a84 MS |
1798 | } |
1799 | } | |
78e54ded MS |
1800 | |
1801 | continue; | |
7cdb1a84 MS |
1802 | } |
1803 | ||
1804 | if ((cmd == RTM_NEWROUTE | |
1805 | && NEXTHOP_IS_ACTIVE(nexthop->flags))) { | |
1806 | routedesc = nexthop->rparent | |
1807 | ? "recursive, multipath" | |
1808 | : "multipath"; | |
1809 | nexthop_num++; | |
1810 | ||
1811 | _netlink_route_build_multipath( | |
1812 | routedesc, bytelen, nexthop, rta, rtnh, | |
1813 | &req.r, &src1); | |
1814 | rtnh = RTNH_NEXT(rtnh); | |
1815 | ||
1816 | if (!setsrc && src1) { | |
1817 | if (family == AF_INET) | |
1818 | src.ipv4 = src1->ipv4; | |
1819 | else if (family == AF_INET6) | |
1820 | src.ipv6 = src1->ipv6; | |
1821 | ||
1822 | setsrc = 1; | |
1823 | } | |
1824 | } | |
1825 | } | |
1826 | if (setsrc && (cmd == RTM_NEWROUTE)) { | |
1827 | if (family == AF_INET) | |
5709131c | 1828 | addattr_l(&req.n, sizeof(req), RTA_PREFSRC, |
7cdb1a84 MS |
1829 | &src.ipv4, bytelen); |
1830 | else if (family == AF_INET6) | |
5709131c | 1831 | addattr_l(&req.n, sizeof(req), RTA_PREFSRC, |
7cdb1a84 MS |
1832 | &src.ipv6, bytelen); |
1833 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1834 | zlog_debug("Setting source"); | |
1835 | } | |
1836 | ||
1837 | if (rta->rta_len > RTA_LENGTH(0)) | |
1838 | addattr_l(&req.n, NL_PKT_BUF_SIZE, RTA_MULTIPATH, | |
1839 | RTA_DATA(rta), RTA_PAYLOAD(rta)); | |
1840 | } | |
1841 | ||
1842 | /* If there is no useful nexthop then return. */ | |
1843 | if (nexthop_num == 0) { | |
1844 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1845 | zlog_debug( | |
1846 | "netlink_route_multipath(): No useful nexthop."); | |
1847 | return 0; | |
1848 | } | |
1849 | ||
1850 | skip: | |
7cdb1a84 MS |
1851 | /* Talk to netlink socket. */ |
1852 | return netlink_talk_info(netlink_talk_filter, &req.n, | |
1853 | dplane_ctx_get_ns(ctx), 0); | |
1854 | } | |
1855 | ||
43b5cc5e | 1856 | int kernel_get_ipmr_sg_stats(struct zebra_vrf *zvrf, void *in) |
e3be0432 | 1857 | { |
5523c156 | 1858 | uint32_t actual_table; |
d62a17ae | 1859 | int suc = 0; |
1860 | struct mcast_route_data *mr = (struct mcast_route_data *)in; | |
bd8b9272 DS |
1861 | struct { |
1862 | struct nlmsghdr n; | |
1863 | struct ndmsg ndm; | |
1864 | char buf[256]; | |
1865 | } req; | |
e3be0432 | 1866 | |
d62a17ae | 1867 | mroute = mr; |
5895d33f | 1868 | struct zebra_ns *zns; |
bd8b9272 | 1869 | |
009f8ad5 | 1870 | zns = zvrf->zns; |
5605ecfc | 1871 | memset(&req, 0, sizeof(req)); |
bd8b9272 DS |
1872 | |
1873 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)); | |
1874 | req.n.nlmsg_flags = NLM_F_REQUEST; | |
1875 | req.n.nlmsg_pid = zns->netlink_cmd.snl.nl_pid; | |
1876 | ||
1877 | req.ndm.ndm_family = RTNL_FAMILY_IPMR; | |
1878 | req.n.nlmsg_type = RTM_GETROUTE; | |
1879 | ||
1880 | addattr_l(&req.n, sizeof(req), RTA_IIF, &mroute->ifindex, 4); | |
1881 | addattr_l(&req.n, sizeof(req), RTA_OIF, &mroute->ifindex, 4); | |
1882 | addattr_l(&req.n, sizeof(req), RTA_SRC, &mroute->sg.src.s_addr, 4); | |
1883 | addattr_l(&req.n, sizeof(req), RTA_DST, &mroute->sg.grp.s_addr, 4); | |
5523c156 DS |
1884 | /* |
1885 | * What? | |
1886 | * | |
1887 | * So during the namespace cleanup we started storing | |
1888 | * the zvrf table_id for the default table as RT_TABLE_MAIN | |
1889 | * which is what the normal routing table for ip routing is. | |
1890 | * This change caused this to break our lookups of sg data | |
1891 | * because prior to this change the zvrf->table_id was 0 | |
1892 | * and when the pim multicast kernel code saw a 0, | |
1893 | * it was auto-translated to RT_TABLE_DEFAULT. But since | |
1894 | * we are now passing in RT_TABLE_MAIN there is no auto-translation | |
1895 | * and the kernel goes screw you and the delicious cookies you | |
1896 | * are trying to give me. So now we have this little hack. | |
1897 | */ | |
1898 | actual_table = (zvrf->table_id == RT_TABLE_MAIN) ? RT_TABLE_DEFAULT : | |
1899 | zvrf->table_id; | |
1900 | addattr_l(&req.n, sizeof(req), RTA_TABLE, &actual_table, 4); | |
e3be0432 | 1901 | |
bd8b9272 DS |
1902 | suc = netlink_talk(netlink_route_change_read_multicast, &req.n, |
1903 | &zns->netlink_cmd, zns, 0); | |
e3be0432 | 1904 | |
bd8b9272 | 1905 | mroute = NULL; |
d62a17ae | 1906 | return suc; |
e3be0432 DS |
1907 | } |
1908 | ||
8d03bc50 SW |
1909 | /* Char length to debug ID with */ |
1910 | #define ID_LENGTH 10 | |
1911 | ||
565ce0d3 | 1912 | static void _netlink_nexthop_build_group(struct nlmsghdr *n, size_t req_size, |
8d03bc50 | 1913 | uint32_t id, |
e22e8001 | 1914 | const struct nh_grp *z_grp, |
0c8215cb | 1915 | const uint8_t count) |
565ce0d3 | 1916 | { |
565ce0d3 | 1917 | struct nexthop_grp grp[count]; |
8d03bc50 SW |
1918 | /* Need space for max group size, "/", and null term */ |
1919 | char buf[(MULTIPATH_NUM * (ID_LENGTH + 1)) + 1]; | |
1920 | char buf1[ID_LENGTH + 2]; | |
1921 | ||
1922 | buf[0] = '\0'; | |
565ce0d3 SW |
1923 | |
1924 | memset(grp, 0, sizeof(grp)); | |
1925 | ||
1926 | if (count) { | |
0c8215cb | 1927 | for (int i = 0; i < count; i++) { |
e22e8001 | 1928 | grp[i].id = z_grp[i].id; |
df7fb580 | 1929 | grp[i].weight = z_grp[i].weight - 1; |
8d03bc50 SW |
1930 | |
1931 | if (IS_ZEBRA_DEBUG_KERNEL) { | |
1932 | if (i == 0) | |
1933 | snprintf(buf, sizeof(buf1), "group %u", | |
1934 | grp[i].id); | |
1935 | else { | |
1936 | snprintf(buf1, sizeof(buf1), "/%u", | |
1937 | grp[i].id); | |
1938 | strlcat(buf, buf1, sizeof(buf)); | |
1939 | } | |
1940 | } | |
565ce0d3 | 1941 | } |
0c8215cb | 1942 | addattr_l(n, req_size, NHA_GROUP, grp, count * sizeof(*grp)); |
565ce0d3 | 1943 | } |
8d03bc50 SW |
1944 | |
1945 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1946 | zlog_debug("%s: ID (%u): %s", __func__, id, buf); | |
565ce0d3 SW |
1947 | } |
1948 | ||
f820d025 SW |
1949 | /** |
1950 | * netlink_nexthop() - Nexthop change via the netlink interface | |
1951 | * | |
1952 | * @ctx: Dataplane ctx | |
1953 | * | |
1954 | * Return: Result status | |
1955 | */ | |
1956 | static int netlink_nexthop(int cmd, struct zebra_dplane_ctx *ctx) | |
1957 | { | |
f820d025 SW |
1958 | struct { |
1959 | struct nlmsghdr n; | |
1960 | struct nhmsg nhm; | |
1961 | char buf[NL_PKT_BUF_SIZE]; | |
1962 | } req; | |
1963 | ||
8d03bc50 SW |
1964 | mpls_lse_t out_lse[MPLS_MAX_LABELS]; |
1965 | char label_buf[256]; | |
1966 | int num_labels = 0; | |
1967 | size_t req_size = sizeof(req); | |
1968 | ||
81505946 SW |
1969 | /* Nothing to do if the kernel doesn't support nexthop objects */ |
1970 | if (!supports_nh) | |
1971 | return 0; | |
1972 | ||
8d03bc50 SW |
1973 | label_buf[0] = '\0'; |
1974 | ||
1975 | memset(&req, 0, req_size); | |
f820d025 | 1976 | |
f820d025 SW |
1977 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct nhmsg)); |
1978 | req.n.nlmsg_flags = NLM_F_CREATE | NLM_F_REQUEST; | |
9a1588c4 SW |
1979 | |
1980 | if (cmd == RTM_NEWNEXTHOP) | |
1981 | req.n.nlmsg_flags |= NLM_F_REPLACE; | |
1982 | ||
f820d025 | 1983 | req.n.nlmsg_type = cmd; |
4f096395 | 1984 | req.n.nlmsg_pid = dplane_ctx_get_ns(ctx)->nls.snl.nl_pid; |
f820d025 SW |
1985 | |
1986 | req.nhm.nh_family = AF_UNSPEC; | |
fec211ad | 1987 | /* TODO: Scope? */ |
f820d025 | 1988 | |
0c8215cb SW |
1989 | uint32_t id = dplane_ctx_get_nhe_id(ctx); |
1990 | ||
1991 | if (!id) { | |
f820d025 SW |
1992 | flog_err( |
1993 | EC_ZEBRA_NHG_FIB_UPDATE, | |
1994 | "Failed trying to update a nexthop group in the kernel that does not have an ID"); | |
1995 | return -1; | |
1996 | } | |
1997 | ||
8d03bc50 | 1998 | addattr32(&req.n, req_size, NHA_ID, id); |
f820d025 SW |
1999 | |
2000 | if (cmd == RTM_NEWNEXTHOP) { | |
e22e8001 | 2001 | if (dplane_ctx_get_nhe_nh_grp_count(ctx)) |
0c8215cb | 2002 | _netlink_nexthop_build_group( |
8d03bc50 | 2003 | &req.n, req_size, id, |
e22e8001 SW |
2004 | dplane_ctx_get_nhe_nh_grp(ctx), |
2005 | dplane_ctx_get_nhe_nh_grp_count(ctx)); | |
0c8215cb SW |
2006 | else { |
2007 | const struct nexthop *nh = | |
2008 | dplane_ctx_get_nhe_ng(ctx)->nexthop; | |
2009 | afi_t afi = dplane_ctx_get_nhe_afi(ctx); | |
e8b0e420 | 2010 | |
0c8215cb | 2011 | if (afi == AFI_IP) |
565ce0d3 | 2012 | req.nhm.nh_family = AF_INET; |
0c8215cb | 2013 | else if (afi == AFI_IP6) |
565ce0d3 | 2014 | req.nhm.nh_family = AF_INET6; |
f820d025 | 2015 | |
565ce0d3 | 2016 | switch (nh->type) { |
a6e6a6d8 | 2017 | case NEXTHOP_TYPE_IPV4: |
565ce0d3 | 2018 | case NEXTHOP_TYPE_IPV4_IFINDEX: |
8d03bc50 | 2019 | addattr_l(&req.n, req_size, NHA_GATEWAY, |
565ce0d3 SW |
2020 | &nh->gate.ipv4, IPV4_MAX_BYTELEN); |
2021 | break; | |
a6e6a6d8 | 2022 | case NEXTHOP_TYPE_IPV6: |
565ce0d3 | 2023 | case NEXTHOP_TYPE_IPV6_IFINDEX: |
8d03bc50 | 2024 | addattr_l(&req.n, req_size, NHA_GATEWAY, |
565ce0d3 SW |
2025 | &nh->gate.ipv6, IPV6_MAX_BYTELEN); |
2026 | break; | |
2027 | case NEXTHOP_TYPE_BLACKHOLE: | |
8d03bc50 SW |
2028 | addattr_l(&req.n, req_size, NHA_BLACKHOLE, NULL, |
2029 | 0); | |
2030 | /* Blackhole shouldn't have anymore attributes | |
2031 | */ | |
2032 | goto nexthop_done; | |
565ce0d3 SW |
2033 | case NEXTHOP_TYPE_IFINDEX: |
2034 | /* Don't need anymore info for this */ | |
2035 | break; | |
a6e6a6d8 SW |
2036 | } |
2037 | ||
2038 | if (!nh->ifindex) { | |
565ce0d3 SW |
2039 | flog_err( |
2040 | EC_ZEBRA_NHG_FIB_UPDATE, | |
2041 | "Context received for kernel nexthop update without an interface"); | |
2042 | return -1; | |
565ce0d3 SW |
2043 | } |
2044 | ||
8d03bc50 SW |
2045 | addattr32(&req.n, req_size, NHA_OIF, nh->ifindex); |
2046 | ||
62d2ecb2 SW |
2047 | if (CHECK_FLAG(nh->flags, NEXTHOP_FLAG_ONLINK)) |
2048 | req.nhm.nh_flags |= RTNH_F_ONLINK; | |
2049 | ||
8d03bc50 SW |
2050 | num_labels = |
2051 | build_label_stack(nh->nh_label, out_lse, | |
2052 | label_buf, sizeof(label_buf)); | |
2053 | ||
2054 | if (num_labels) { | |
2055 | /* Set the BoS bit */ | |
2056 | out_lse[num_labels - 1] |= | |
2057 | htonl(1 << MPLS_LS_S_SHIFT); | |
2058 | ||
2059 | /* | |
2060 | * TODO: MPLS unsupported for now in kernel. | |
2061 | */ | |
2062 | if (req.nhm.nh_family == AF_MPLS) | |
2063 | goto nexthop_done; | |
2064 | #if 0 | |
2065 | addattr_l(&req.n, req_size, NHA_NEWDST, | |
2066 | &out_lse, | |
2067 | num_labels | |
2068 | * sizeof(mpls_lse_t)); | |
2069 | #endif | |
2070 | else { | |
2071 | struct rtattr *nest; | |
2072 | uint16_t encap = LWTUNNEL_ENCAP_MPLS; | |
2073 | ||
2074 | addattr_l(&req.n, req_size, | |
2075 | NHA_ENCAP_TYPE, &encap, | |
2076 | sizeof(uint16_t)); | |
2077 | nest = addattr_nest(&req.n, req_size, | |
2078 | NHA_ENCAP); | |
2079 | addattr_l(&req.n, req_size, | |
2080 | MPLS_IPTUNNEL_DST, &out_lse, | |
2081 | num_labels | |
2082 | * sizeof(mpls_lse_t)); | |
2083 | addattr_nest_end(&req.n, nest); | |
2084 | } | |
2085 | } | |
2086 | ||
2087 | nexthop_done: | |
2088 | if (IS_ZEBRA_DEBUG_KERNEL) { | |
2089 | char buf[NEXTHOP_STRLEN]; | |
2090 | ||
2091 | snprintfrr(buf, sizeof(buf), "%pNHv", nh); | |
2092 | zlog_debug("%s: ID (%u): %s (%u) %s ", __func__, | |
2093 | id, buf, nh->vrf_id, label_buf); | |
2094 | } | |
f820d025 SW |
2095 | } |
2096 | ||
38e40db1 | 2097 | req.nhm.nh_protocol = zebra2proto(dplane_ctx_get_nhe_type(ctx)); |
f820d025 | 2098 | |
f820d025 SW |
2099 | } else if (cmd != RTM_DELNEXTHOP) { |
2100 | flog_err( | |
2101 | EC_ZEBRA_NHG_FIB_UPDATE, | |
2102 | "Nexthop group kernel update command (%d) does not exist", | |
2103 | cmd); | |
2104 | return -1; | |
2105 | } | |
2106 | ||
0c8215cb | 2107 | _netlink_nexthop_debug(cmd, id); |
f820d025 SW |
2108 | |
2109 | return netlink_talk_info(netlink_talk_filter, &req.n, | |
2110 | dplane_ctx_get_ns(ctx), 0); | |
2111 | } | |
2112 | ||
2113 | /** | |
2114 | * kernel_nexthop_update() - Update/delete a nexthop from the kernel | |
2115 | * | |
2116 | * @ctx: Dataplane context | |
2117 | * | |
2118 | * Return: Dataplane result flag | |
2119 | */ | |
2120 | enum zebra_dplane_result kernel_nexthop_update(struct zebra_dplane_ctx *ctx) | |
2121 | { | |
98cda54a SW |
2122 | int cmd = 0; |
2123 | int ret = 0; | |
f820d025 SW |
2124 | |
2125 | switch (dplane_ctx_get_op(ctx)) { | |
2126 | case DPLANE_OP_NH_DELETE: | |
2127 | cmd = RTM_DELNEXTHOP; | |
2128 | break; | |
2129 | case DPLANE_OP_NH_INSTALL: | |
2130 | case DPLANE_OP_NH_UPDATE: | |
2131 | cmd = RTM_NEWNEXTHOP; | |
2132 | break; | |
2133 | case DPLANE_OP_ROUTE_INSTALL: | |
2134 | case DPLANE_OP_ROUTE_UPDATE: | |
2135 | case DPLANE_OP_ROUTE_DELETE: | |
2136 | case DPLANE_OP_ROUTE_NOTIFY: | |
2137 | case DPLANE_OP_LSP_INSTALL: | |
2138 | case DPLANE_OP_LSP_UPDATE: | |
2139 | case DPLANE_OP_LSP_DELETE: | |
2140 | case DPLANE_OP_LSP_NOTIFY: | |
2141 | case DPLANE_OP_PW_INSTALL: | |
2142 | case DPLANE_OP_PW_UNINSTALL: | |
2143 | case DPLANE_OP_SYS_ROUTE_ADD: | |
2144 | case DPLANE_OP_SYS_ROUTE_DELETE: | |
2145 | case DPLANE_OP_ADDR_INSTALL: | |
2146 | case DPLANE_OP_ADDR_UNINSTALL: | |
2147 | case DPLANE_OP_MAC_INSTALL: | |
2148 | case DPLANE_OP_MAC_DELETE: | |
40a2a6cd SW |
2149 | case DPLANE_OP_NEIGH_INSTALL: |
2150 | case DPLANE_OP_NEIGH_UPDATE: | |
2151 | case DPLANE_OP_NEIGH_DELETE: | |
2152 | case DPLANE_OP_VTEP_ADD: | |
2153 | case DPLANE_OP_VTEP_DELETE: | |
f820d025 SW |
2154 | case DPLANE_OP_NONE: |
2155 | flog_err( | |
2156 | EC_ZEBRA_NHG_FIB_UPDATE, | |
2157 | "Context received for kernel nexthop update with incorrect OP code (%u)", | |
2158 | dplane_ctx_get_op(ctx)); | |
2159 | return ZEBRA_DPLANE_REQUEST_FAILURE; | |
f820d025 SW |
2160 | } |
2161 | ||
2162 | ret = netlink_nexthop(cmd, ctx); | |
2163 | ||
2164 | return (ret == 0 ? ZEBRA_DPLANE_REQUEST_SUCCESS | |
2165 | : ZEBRA_DPLANE_REQUEST_FAILURE); | |
2166 | } | |
2167 | ||
7cdb1a84 MS |
2168 | /* |
2169 | * Update or delete a prefix from the kernel, | |
2170 | * using info from a dataplane context. | |
2171 | */ | |
25779064 | 2172 | enum zebra_dplane_result kernel_route_update(struct zebra_dplane_ctx *ctx) |
7cdb1a84 MS |
2173 | { |
2174 | int cmd, ret; | |
2175 | const struct prefix *p = dplane_ctx_get_dest(ctx); | |
f183e380 | 2176 | struct nexthop *nexthop; |
7cdb1a84 MS |
2177 | |
2178 | if (dplane_ctx_get_op(ctx) == DPLANE_OP_ROUTE_DELETE) { | |
2179 | cmd = RTM_DELROUTE; | |
2180 | } else if (dplane_ctx_get_op(ctx) == DPLANE_OP_ROUTE_INSTALL) { | |
2181 | cmd = RTM_NEWROUTE; | |
2182 | } else if (dplane_ctx_get_op(ctx) == DPLANE_OP_ROUTE_UPDATE) { | |
2183 | ||
2184 | if (p->family == AF_INET || v6_rr_semantics) { | |
2185 | /* Single 'replace' operation */ | |
2186 | cmd = RTM_NEWROUTE; | |
fe5f21af DS |
2187 | |
2188 | /* | |
2189 | * With route replace semantics in place | |
2190 | * for v4 routes and the new route is a system | |
2191 | * route we do not install anything. | |
2192 | * The problem here is that the new system | |
2193 | * route should cause us to withdraw from | |
2194 | * the kernel the old non-system route | |
2195 | */ | |
2196 | if (RSYSTEM_ROUTE(dplane_ctx_get_type(ctx)) && | |
2197 | !RSYSTEM_ROUTE(dplane_ctx_get_old_type(ctx))) | |
2198 | (void)netlink_route_multipath(RTM_DELROUTE, | |
2199 | ctx); | |
7cdb1a84 MS |
2200 | } else { |
2201 | /* | |
2202 | * So v6 route replace semantics are not in | |
2203 | * the kernel at this point as I understand it. | |
2204 | * so let's do a delete then an add. | |
2205 | * In the future once v6 route replace semantics | |
2206 | * are in we can figure out what to do here to | |
2207 | * allow working with old and new kernels. | |
2208 | * | |
2209 | * I'm also intentionally ignoring the failure case | |
2210 | * of the route delete. If that happens yeah we're | |
2211 | * screwed. | |
2212 | */ | |
3cdba47a DS |
2213 | if (!RSYSTEM_ROUTE(dplane_ctx_get_old_type(ctx))) |
2214 | (void)netlink_route_multipath(RTM_DELROUTE, | |
2215 | ctx); | |
7cdb1a84 MS |
2216 | cmd = RTM_NEWROUTE; |
2217 | } | |
2218 | ||
2219 | } else { | |
2220 | return ZEBRA_DPLANE_REQUEST_FAILURE; | |
2221 | } | |
2222 | ||
3cdba47a DS |
2223 | if (!RSYSTEM_ROUTE(dplane_ctx_get_type(ctx))) |
2224 | ret = netlink_route_multipath(cmd, ctx); | |
2225 | else | |
2226 | ret = 0; | |
f183e380 MS |
2227 | if ((cmd == RTM_NEWROUTE) && (ret == 0)) { |
2228 | /* Update installed nexthops to signal which have been | |
2229 | * installed. | |
2230 | */ | |
2231 | for (ALL_NEXTHOPS_PTR(dplane_ctx_get_ng(ctx), nexthop)) { | |
2232 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_RECURSIVE)) | |
2233 | continue; | |
2234 | ||
2235 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE)) { | |
2236 | SET_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB); | |
f183e380 MS |
2237 | } |
2238 | } | |
2239 | } | |
7cdb1a84 MS |
2240 | |
2241 | return (ret == 0 ? | |
2242 | ZEBRA_DPLANE_REQUEST_SUCCESS : ZEBRA_DPLANE_REQUEST_FAILURE); | |
2243 | } | |
2244 | ||
d9f5b2f5 SW |
2245 | /** |
2246 | * netlink_nexthop_process_nh() - Parse the gatway/if info from a new nexthop | |
2247 | * | |
2248 | * @tb: Netlink RTA data | |
2249 | * @family: Address family in the nhmsg | |
8c0a24c1 | 2250 | * @ifp: Interface connected - this should be NULL, we fill it in |
d9f5b2f5 SW |
2251 | * @ns_id: Namspace id |
2252 | * | |
2253 | * Return: New nexthop | |
2254 | */ | |
e22e8001 SW |
2255 | static struct nexthop netlink_nexthop_process_nh(struct rtattr **tb, |
2256 | unsigned char family, | |
2257 | struct interface **ifp, | |
2258 | ns_id_t ns_id) | |
d9f5b2f5 | 2259 | { |
e22e8001 | 2260 | struct nexthop nh = {}; |
d9f5b2f5 | 2261 | void *gate = NULL; |
8e401b25 | 2262 | enum nexthop_types_t type = 0; |
e22e8001 SW |
2263 | int if_index = 0; |
2264 | size_t sz = 0; | |
7134ba70 | 2265 | struct interface *ifp_lookup; |
d9f5b2f5 SW |
2266 | |
2267 | if_index = *(int *)RTA_DATA(tb[NHA_OIF]); | |
2268 | ||
8e401b25 | 2269 | |
d9f5b2f5 SW |
2270 | if (tb[NHA_GATEWAY]) { |
2271 | switch (family) { | |
2272 | case AF_INET: | |
8e401b25 | 2273 | type = NEXTHOP_TYPE_IPV4_IFINDEX; |
d9f5b2f5 SW |
2274 | sz = 4; |
2275 | break; | |
2276 | case AF_INET6: | |
8e401b25 | 2277 | type = NEXTHOP_TYPE_IPV6_IFINDEX; |
d9f5b2f5 SW |
2278 | sz = 16; |
2279 | break; | |
2280 | default: | |
2281 | flog_warn( | |
2282 | EC_ZEBRA_BAD_NHG_MESSAGE, | |
c4239c05 | 2283 | "Nexthop gateway with bad address family (%d) received from kernel", |
d9f5b2f5 | 2284 | family); |
e22e8001 | 2285 | return nh; |
d9f5b2f5 SW |
2286 | } |
2287 | gate = RTA_DATA(tb[NHA_GATEWAY]); | |
e22e8001 | 2288 | } else |
8e401b25 | 2289 | type = NEXTHOP_TYPE_IFINDEX; |
d9f5b2f5 | 2290 | |
8e401b25 | 2291 | if (type) |
e22e8001 | 2292 | nh.type = type; |
8e401b25 SW |
2293 | |
2294 | if (gate) | |
e22e8001 | 2295 | memcpy(&(nh.gate), gate, sz); |
8e401b25 SW |
2296 | |
2297 | if (if_index) | |
e22e8001 | 2298 | nh.ifindex = if_index; |
8e401b25 | 2299 | |
7134ba70 DS |
2300 | ifp_lookup = |
2301 | if_lookup_by_index_per_ns(zebra_ns_lookup(ns_id), nh.ifindex); | |
2302 | ||
e22e8001 | 2303 | if (ifp) |
7134ba70 DS |
2304 | *ifp = ifp_lookup; |
2305 | if (ifp_lookup) | |
2306 | nh.vrf_id = ifp_lookup->vrf_id; | |
e22e8001 | 2307 | else { |
d9f5b2f5 SW |
2308 | flog_warn( |
2309 | EC_ZEBRA_UNKNOWN_INTERFACE, | |
2310 | "%s: Unknown nexthop interface %u received, defaulting to VRF_DEFAULT", | |
e22e8001 | 2311 | __PRETTY_FUNCTION__, nh.ifindex); |
d9f5b2f5 | 2312 | |
e22e8001 | 2313 | nh.vrf_id = VRF_DEFAULT; |
d9f5b2f5 SW |
2314 | } |
2315 | ||
2316 | if (tb[NHA_ENCAP] && tb[NHA_ENCAP_TYPE]) { | |
2317 | uint16_t encap_type = *(uint16_t *)RTA_DATA(tb[NHA_ENCAP_TYPE]); | |
2318 | int num_labels = 0; | |
6e728764 | 2319 | |
d9f5b2f5 SW |
2320 | mpls_label_t labels[MPLS_MAX_LABELS] = {0}; |
2321 | ||
e22e8001 | 2322 | if (encap_type == LWTUNNEL_ENCAP_MPLS) |
d9f5b2f5 | 2323 | num_labels = parse_encap_mpls(tb[NHA_ENCAP], labels); |
d9f5b2f5 | 2324 | |
e22e8001 SW |
2325 | if (num_labels) |
2326 | nexthop_add_labels(&nh, ZEBRA_LSP_STATIC, num_labels, | |
d9f5b2f5 | 2327 | labels); |
d9f5b2f5 SW |
2328 | } |
2329 | ||
2330 | return nh; | |
2331 | } | |
2332 | ||
85f5e761 | 2333 | static int netlink_nexthop_process_group(struct rtattr **tb, |
5a935f79 | 2334 | struct nh_grp *z_grp, int z_grp_size) |
d9f5b2f5 | 2335 | { |
e22e8001 SW |
2336 | uint8_t count = 0; |
2337 | /* linux/nexthop.h group struct */ | |
d9f5b2f5 SW |
2338 | struct nexthop_grp *n_grp = NULL; |
2339 | ||
85f5e761 | 2340 | n_grp = (struct nexthop_grp *)RTA_DATA(tb[NHA_GROUP]); |
d9f5b2f5 SW |
2341 | count = (RTA_PAYLOAD(tb[NHA_GROUP]) / sizeof(*n_grp)); |
2342 | ||
2343 | if (!count || (count * sizeof(*n_grp)) != RTA_PAYLOAD(tb[NHA_GROUP])) { | |
2344 | flog_warn(EC_ZEBRA_BAD_NHG_MESSAGE, | |
2345 | "Invalid nexthop group received from the kernel"); | |
85f5e761 | 2346 | return count; |
d9f5b2f5 SW |
2347 | } |
2348 | ||
38e40db1 | 2349 | #if 0 |
d9f5b2f5 | 2350 | // TODO: Need type for something? |
85f5e761 SW |
2351 | zlog_debug("Nexthop group type: %d", |
2352 | *((uint16_t *)RTA_DATA(tb[NHA_GROUP_TYPE]))); | |
d9f5b2f5 | 2353 | |
38e40db1 | 2354 | #endif |
d9f5b2f5 | 2355 | |
5a935f79 | 2356 | for (int i = 0; ((i < count) && (i < z_grp_size)); i++) { |
e22e8001 | 2357 | z_grp[i].id = n_grp[i].id; |
df7fb580 | 2358 | z_grp[i].weight = n_grp[i].weight + 1; |
85f5e761 | 2359 | } |
d9f5b2f5 SW |
2360 | return count; |
2361 | } | |
2362 | ||
2363 | /** | |
2364 | * netlink_nexthop_change() - Read in change about nexthops from the kernel | |
2365 | * | |
2366 | * @h: Netlink message header | |
2367 | * @ns_id: Namspace id | |
2368 | * @startup: Are we reading under startup conditions? | |
2369 | * | |
2370 | * Return: Result status | |
2371 | */ | |
2372 | int netlink_nexthop_change(struct nlmsghdr *h, ns_id_t ns_id, int startup) | |
2373 | { | |
2374 | int len; | |
2375 | /* nexthop group id */ | |
2376 | uint32_t id; | |
2377 | unsigned char family; | |
38e40db1 | 2378 | int type; |
e8b0e420 | 2379 | afi_t afi = AFI_UNSPEC; |
bbb3940e | 2380 | vrf_id_t vrf_id = 0; |
8c0a24c1 | 2381 | struct interface *ifp = NULL; |
d9f5b2f5 | 2382 | struct nhmsg *nhm = NULL; |
e22e8001 SW |
2383 | struct nexthop nh = {}; |
2384 | struct nh_grp grp[MULTIPATH_NUM] = {}; | |
85f5e761 | 2385 | /* Count of nexthops in group array */ |
e22e8001 | 2386 | uint8_t grp_count = 0; |
e22e8001 | 2387 | struct rtattr *tb[NHA_MAX + 1] = {}; |
d9f5b2f5 | 2388 | |
d9f5b2f5 SW |
2389 | nhm = NLMSG_DATA(h); |
2390 | ||
2391 | if (startup && h->nlmsg_type != RTM_NEWNEXTHOP) | |
2392 | return 0; | |
2393 | ||
2394 | len = h->nlmsg_len - NLMSG_LENGTH(sizeof(struct nhmsg)); | |
2395 | if (len < 0) { | |
2396 | zlog_warn( | |
2397 | "%s: Message received from netlink is of a broken size %d %zu", | |
2398 | __PRETTY_FUNCTION__, h->nlmsg_len, | |
2399 | (size_t)NLMSG_LENGTH(sizeof(struct nhmsg))); | |
2400 | return -1; | |
2401 | } | |
2402 | ||
d9f5b2f5 SW |
2403 | netlink_parse_rtattr(tb, NHA_MAX, RTM_NHA(nhm), len); |
2404 | ||
2405 | ||
2406 | if (!tb[NHA_ID]) { | |
2407 | flog_warn( | |
2408 | EC_ZEBRA_BAD_NHG_MESSAGE, | |
2409 | "Nexthop group without an ID received from the kernel"); | |
2410 | return -1; | |
2411 | } | |
2412 | ||
2413 | /* We use the ID key'd nhg table for kernel updates */ | |
2414 | id = *((uint32_t *)RTA_DATA(tb[NHA_ID])); | |
d9f5b2f5 | 2415 | |
e8b0e420 | 2416 | family = nhm->nh_family; |
e8b0e420 SW |
2417 | afi = family2afi(family); |
2418 | ||
38e40db1 SW |
2419 | type = proto2zebra(nhm->nh_protocol, 0, true); |
2420 | ||
fdee485a SW |
2421 | if (IS_ZEBRA_DEBUG_KERNEL) |
2422 | zlog_debug("%s ID (%u) %s NS %u", | |
2423 | nl_msg_type_to_str(h->nlmsg_type), id, | |
2424 | nl_family_to_str(family), ns_id); | |
2425 | ||
2426 | ||
d9f5b2f5 SW |
2427 | if (h->nlmsg_type == RTM_NEWNEXTHOP) { |
2428 | if (tb[NHA_GROUP]) { | |
2429 | /** | |
2430 | * If this is a group message its only going to have | |
2431 | * an array of nexthop IDs associated with it | |
2432 | */ | |
5a935f79 SW |
2433 | grp_count = netlink_nexthop_process_group( |
2434 | tb, grp, array_size(grp)); | |
85f5e761 SW |
2435 | } else { |
2436 | if (tb[NHA_BLACKHOLE]) { | |
2437 | /** | |
2438 | * This nexthop is just for blackhole-ing | |
2439 | * traffic, it should not have an OIF, GATEWAY, | |
2440 | * or ENCAP | |
2441 | */ | |
e22e8001 SW |
2442 | nh.type = NEXTHOP_TYPE_BLACKHOLE; |
2443 | nh.bh_type = BLACKHOLE_UNSPEC; | |
2444 | } else if (tb[NHA_OIF]) | |
85f5e761 SW |
2445 | /** |
2446 | * This is a true new nexthop, so we need | |
2447 | * to parse the gateway and device info | |
2448 | */ | |
2449 | nh = netlink_nexthop_process_nh(tb, family, | |
2450 | &ifp, ns_id); | |
e22e8001 SW |
2451 | else { |
2452 | ||
8e401b25 SW |
2453 | flog_warn( |
2454 | EC_ZEBRA_BAD_NHG_MESSAGE, | |
2455 | "Invalid Nexthop message received from the kernel with ID (%u)", | |
2456 | id); | |
2457 | return -1; | |
2458 | } | |
e22e8001 SW |
2459 | SET_FLAG(nh.flags, NEXTHOP_FLAG_ACTIVE); |
2460 | if (nhm->nh_flags & RTNH_F_ONLINK) | |
2461 | SET_FLAG(nh.flags, NEXTHOP_FLAG_ONLINK); | |
2462 | vrf_id = nh.vrf_id; | |
d9f5b2f5 SW |
2463 | } |
2464 | ||
38e40db1 SW |
2465 | if (zebra_nhg_kernel_find(id, &nh, grp, grp_count, vrf_id, afi, |
2466 | type, startup)) | |
e22e8001 | 2467 | return -1; |
8e401b25 | 2468 | |
9a1588c4 SW |
2469 | } else if (h->nlmsg_type == RTM_DELNEXTHOP) |
2470 | zebra_nhg_kernel_del(id); | |
d9f5b2f5 | 2471 | |
d9f5b2f5 SW |
2472 | return 0; |
2473 | } | |
2474 | ||
2475 | /** | |
2476 | * netlink_request_nexthop() - Request nextop information from the kernel | |
2477 | * @zns: Zebra namespace | |
2478 | * @family: AF_* netlink family | |
2479 | * @type: RTM_* route type | |
2480 | * | |
2481 | * Return: Result status | |
2482 | */ | |
2483 | static int netlink_request_nexthop(struct zebra_ns *zns, int family, int type) | |
2484 | { | |
2485 | struct { | |
2486 | struct nlmsghdr n; | |
2487 | struct nhmsg nhm; | |
2488 | } req; | |
2489 | ||
2490 | /* Form the request, specifying filter (rtattr) if needed. */ | |
2491 | memset(&req, 0, sizeof(req)); | |
2492 | req.n.nlmsg_type = type; | |
2493 | req.n.nlmsg_flags = NLM_F_ROOT | NLM_F_MATCH | NLM_F_REQUEST; | |
2494 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct nhmsg)); | |
2495 | req.nhm.nh_family = family; | |
2496 | ||
2497 | return netlink_request(&zns->netlink_cmd, &req.n); | |
2498 | } | |
2499 | ||
7d5bb02b | 2500 | |
d9f5b2f5 SW |
2501 | /** |
2502 | * netlink_nexthop_read() - Nexthop read function using netlink interface | |
2503 | * | |
2504 | * @zns: Zebra name space | |
2505 | * | |
2506 | * Return: Result status | |
2507 | * Only called at bootstrap time. | |
2508 | */ | |
2509 | int netlink_nexthop_read(struct zebra_ns *zns) | |
2510 | { | |
2511 | int ret; | |
2512 | struct zebra_dplane_info dp_info; | |
2513 | ||
2514 | zebra_dplane_info_from_zns(&dp_info, zns, true /*is_cmd*/); | |
2515 | ||
2516 | /* Get nexthop objects */ | |
2517 | ret = netlink_request_nexthop(zns, AF_UNSPEC, RTM_GETNEXTHOP); | |
2518 | if (ret < 0) | |
2519 | return ret; | |
2520 | ret = netlink_parse_info(netlink_nexthop_change, &zns->netlink_cmd, | |
2521 | &dp_info, 0, 1); | |
81505946 SW |
2522 | |
2523 | if (!ret) | |
2524 | /* If we succesfully read in nexthop objects, | |
2525 | * this kernel must support them. | |
2526 | */ | |
2527 | supports_nh = true; | |
2528 | else if (IS_ZEBRA_DEBUG_KERNEL) | |
2529 | zlog_debug("Nexthop objects not supported on this kernel"); | |
2530 | ||
60e0eaee | 2531 | return ret; |
d9f5b2f5 SW |
2532 | } |
2533 | ||
2534 | ||
d62a17ae | 2535 | int kernel_neigh_update(int add, int ifindex, uint32_t addr, char *lla, |
5895d33f | 2536 | int llalen, ns_id_t ns_id) |
6b8a5694 | 2537 | { |
d62a17ae | 2538 | return netlink_neigh_update(add ? RTM_NEWNEIGH : RTM_DELNEIGH, ifindex, |
5895d33f | 2539 | addr, lla, llalen, ns_id); |
6b8a5694 | 2540 | } |
718e3744 | 2541 | |
13d60d35 | 2542 | /* |
2543 | * Add remote VTEP to the flood list for this VxLAN interface (VNI). This | |
2544 | * is done by adding an FDB entry with a MAC of 00:00:00:00:00:00. | |
2545 | */ | |
0bbd4ff4 MS |
2546 | static int netlink_vxlan_flood_update_ctx(const struct zebra_dplane_ctx *ctx, |
2547 | int cmd) | |
13d60d35 | 2548 | { |
f3dbec60 | 2549 | uint8_t protocol = RTPROT_ZEBRA; |
d62a17ae | 2550 | struct { |
2551 | struct nlmsghdr n; | |
2552 | struct ndmsg ndm; | |
2553 | char buf[256]; | |
2554 | } req; | |
d7c0a89a | 2555 | uint8_t dst_mac[6] = {0x0, 0x0, 0x0, 0x0, 0x0, 0x0}; |
0bbd4ff4 | 2556 | const struct ipaddr *addr; |
d62a17ae | 2557 | |
5605ecfc | 2558 | memset(&req, 0, sizeof(req)); |
d62a17ae | 2559 | |
2560 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)); | |
2561 | req.n.nlmsg_flags = NLM_F_REQUEST; | |
2562 | if (cmd == RTM_NEWNEIGH) | |
2563 | req.n.nlmsg_flags |= (NLM_F_CREATE | NLM_F_APPEND); | |
2564 | req.n.nlmsg_type = cmd; | |
2565 | req.ndm.ndm_family = PF_BRIDGE; | |
2566 | req.ndm.ndm_state = NUD_NOARP | NUD_PERMANENT; | |
fec211ad | 2567 | req.ndm.ndm_flags |= NTF_SELF; /* Handle by "self", not "master" */ |
d62a17ae | 2568 | |
2569 | ||
f3dbec60 DS |
2570 | addattr_l(&req.n, sizeof(req), |
2571 | NDA_PROTOCOL, &protocol, sizeof(protocol)); | |
d62a17ae | 2572 | addattr_l(&req.n, sizeof(req), NDA_LLADDR, &dst_mac, 6); |
0bbd4ff4 | 2573 | req.ndm.ndm_ifindex = dplane_ctx_get_ifindex(ctx); |
13d60d35 | 2574 | |
0bbd4ff4 | 2575 | addr = dplane_ctx_neigh_get_ipaddr(ctx); |
13d60d35 | 2576 | |
0bbd4ff4 | 2577 | addattr_l(&req.n, sizeof(req), NDA_DST, &(addr->ipaddr_v4), 4); |
13d60d35 | 2578 | |
0bbd4ff4 MS |
2579 | return netlink_talk_info(netlink_talk_filter, &req.n, |
2580 | dplane_ctx_get_ns(ctx), 0); | |
13d60d35 | 2581 | } |
2582 | ||
2232a77c | 2583 | #ifndef NDA_RTA |
d62a17ae | 2584 | #define NDA_RTA(r) \ |
2585 | ((struct rtattr *)(((char *)(r)) + NLMSG_ALIGN(sizeof(struct ndmsg)))) | |
2232a77c | 2586 | #endif |
2587 | ||
2414abd3 | 2588 | static int netlink_macfdb_change(struct nlmsghdr *h, int len, ns_id_t ns_id) |
2232a77c | 2589 | { |
d62a17ae | 2590 | struct ndmsg *ndm; |
2591 | struct interface *ifp; | |
2592 | struct zebra_if *zif; | |
d62a17ae | 2593 | struct rtattr *tb[NDA_MAX + 1]; |
2594 | struct interface *br_if; | |
2595 | struct ethaddr mac; | |
2596 | vlanid_t vid = 0; | |
2597 | struct prefix vtep_ip; | |
2598 | int vid_present = 0, dst_present = 0; | |
2599 | char buf[ETHER_ADDR_STRLEN]; | |
2600 | char vid_buf[20]; | |
2601 | char dst_buf[30]; | |
a37f4598 | 2602 | bool sticky; |
d62a17ae | 2603 | |
2604 | ndm = NLMSG_DATA(h); | |
2605 | ||
2853fed6 | 2606 | /* We only process macfdb notifications if EVPN is enabled */ |
2607 | if (!is_evpn_enabled()) | |
2608 | return 0; | |
2609 | ||
d62a17ae | 2610 | /* The interface should exist. */ |
5895d33f | 2611 | ifp = if_lookup_by_index_per_ns(zebra_ns_lookup(ns_id), |
d62a17ae | 2612 | ndm->ndm_ifindex); |
28bd0652 DS |
2613 | if (!ifp || !ifp->info) { |
2614 | if (IS_ZEBRA_DEBUG_KERNEL) | |
2615 | zlog_debug("\t%s without associated interface: %u", | |
2616 | __PRETTY_FUNCTION__, ndm->ndm_ifindex); | |
d62a17ae | 2617 | return 0; |
28bd0652 | 2618 | } |
d62a17ae | 2619 | |
2620 | /* The interface should be something we're interested in. */ | |
28bd0652 DS |
2621 | if (!IS_ZEBRA_IF_BRIDGE_SLAVE(ifp)) { |
2622 | if (IS_ZEBRA_DEBUG_KERNEL) | |
2623 | zlog_debug("\t%s Not interested in %s, not a slave", | |
2624 | __PRETTY_FUNCTION__, ifp->name); | |
d62a17ae | 2625 | return 0; |
28bd0652 | 2626 | } |
d62a17ae | 2627 | |
2628 | /* Drop "permanent" entries. */ | |
28bd0652 DS |
2629 | if (ndm->ndm_state & NUD_PERMANENT) { |
2630 | if (IS_ZEBRA_DEBUG_KERNEL) | |
2631 | zlog_debug("\t%s Entry is PERMANENT, dropping", | |
2632 | __PRETTY_FUNCTION__); | |
d62a17ae | 2633 | return 0; |
28bd0652 | 2634 | } |
d62a17ae | 2635 | |
2636 | zif = (struct zebra_if *)ifp->info; | |
2637 | if ((br_if = zif->brslave_info.br_if) == NULL) { | |
28bd0652 DS |
2638 | if (IS_ZEBRA_DEBUG_KERNEL) |
2639 | zlog_debug( | |
2640 | "%s family %s IF %s(%u) brIF %u - no bridge master", | |
2641 | nl_msg_type_to_str(h->nlmsg_type), | |
2642 | nl_family_to_str(ndm->ndm_family), ifp->name, | |
2643 | ndm->ndm_ifindex, | |
2644 | zif->brslave_info.bridge_ifindex); | |
d62a17ae | 2645 | return 0; |
2646 | } | |
2647 | ||
2648 | /* Parse attributes and extract fields of interest. */ | |
2649 | memset(tb, 0, sizeof tb); | |
2650 | netlink_parse_rtattr(tb, NDA_MAX, NDA_RTA(ndm), len); | |
2651 | ||
2652 | if (!tb[NDA_LLADDR]) { | |
28bd0652 DS |
2653 | if (IS_ZEBRA_DEBUG_KERNEL) |
2654 | zlog_debug("%s family %s IF %s(%u) brIF %u - no LLADDR", | |
2655 | nl_msg_type_to_str(h->nlmsg_type), | |
2656 | nl_family_to_str(ndm->ndm_family), ifp->name, | |
2657 | ndm->ndm_ifindex, | |
2658 | zif->brslave_info.bridge_ifindex); | |
d62a17ae | 2659 | return 0; |
2660 | } | |
2661 | ||
ff8b7eb8 | 2662 | if (RTA_PAYLOAD(tb[NDA_LLADDR]) != ETH_ALEN) { |
28bd0652 DS |
2663 | if (IS_ZEBRA_DEBUG_KERNEL) |
2664 | zlog_debug( | |
2665 | "%s family %s IF %s(%u) brIF %u - LLADDR is not MAC, len %lu", | |
2666 | nl_msg_type_to_str(h->nlmsg_type), | |
2667 | nl_family_to_str(ndm->ndm_family), ifp->name, | |
2668 | ndm->ndm_ifindex, | |
2669 | zif->brslave_info.bridge_ifindex, | |
2670 | (unsigned long)RTA_PAYLOAD(tb[NDA_LLADDR])); | |
d62a17ae | 2671 | return 0; |
2672 | } | |
2673 | ||
ff8b7eb8 | 2674 | memcpy(&mac, RTA_DATA(tb[NDA_LLADDR]), ETH_ALEN); |
d62a17ae | 2675 | |
2676 | if ((NDA_VLAN <= NDA_MAX) && tb[NDA_VLAN]) { | |
2677 | vid_present = 1; | |
d7c0a89a | 2678 | vid = *(uint16_t *)RTA_DATA(tb[NDA_VLAN]); |
d62a17ae | 2679 | sprintf(vid_buf, " VLAN %u", vid); |
2680 | } | |
2681 | ||
2682 | if (tb[NDA_DST]) { | |
2683 | /* TODO: Only IPv4 supported now. */ | |
2684 | dst_present = 1; | |
2685 | vtep_ip.family = AF_INET; | |
2686 | vtep_ip.prefixlen = IPV4_MAX_BITLEN; | |
2687 | memcpy(&(vtep_ip.u.prefix4.s_addr), RTA_DATA(tb[NDA_DST]), | |
2688 | IPV4_MAX_BYTELEN); | |
2689 | sprintf(dst_buf, " dst %s", inet_ntoa(vtep_ip.u.prefix4)); | |
2690 | } | |
2691 | ||
a37f4598 | 2692 | sticky = !!(ndm->ndm_state & NUD_NOARP); |
d62a17ae | 2693 | |
2694 | if (IS_ZEBRA_DEBUG_KERNEL) | |
2695 | zlog_debug("Rx %s family %s IF %s(%u)%s %sMAC %s%s", | |
2696 | nl_msg_type_to_str(h->nlmsg_type), | |
2697 | nl_family_to_str(ndm->ndm_family), ifp->name, | |
2698 | ndm->ndm_ifindex, vid_present ? vid_buf : "", | |
2699 | sticky ? "sticky " : "", | |
2700 | prefix_mac2str(&mac, buf, sizeof(buf)), | |
2701 | dst_present ? dst_buf : ""); | |
2702 | ||
28bd0652 DS |
2703 | if (filter_vlan && vid != filter_vlan) { |
2704 | if (IS_ZEBRA_DEBUG_KERNEL) | |
2705 | zlog_debug("\tFiltered due to filter vlan: %d", | |
2706 | filter_vlan); | |
d62a17ae | 2707 | return 0; |
28bd0652 | 2708 | } |
d62a17ae | 2709 | |
2710 | /* If add or update, do accordingly if learnt on a "local" interface; if | |
2711 | * the notification is over VxLAN, this has to be related to | |
2712 | * multi-homing, | |
2713 | * so perform an implicit delete of any local entry (if it exists). | |
2714 | */ | |
2715 | if (h->nlmsg_type == RTM_NEWNEIGH) { | |
d62a17ae | 2716 | if (IS_ZEBRA_IF_VXLAN(ifp)) |
2717 | return zebra_vxlan_check_del_local_mac(ifp, br_if, &mac, | |
2718 | vid); | |
2719 | ||
2720 | return zebra_vxlan_local_mac_add_update(ifp, br_if, &mac, vid, | |
2721 | sticky); | |
2722 | } | |
2723 | ||
2724 | /* This is a delete notification. | |
2725 | * 1. For a MAC over VxLan, check if it needs to be refreshed(readded) | |
2726 | * 2. For a MAC over "local" interface, delete the mac | |
2727 | * Note: We will get notifications from both bridge driver and VxLAN | |
2728 | * driver. | |
2729 | * Ignore the notification from VxLan driver as it is also generated | |
2730 | * when mac moves from remote to local. | |
2731 | */ | |
28bd0652 DS |
2732 | if (dst_present) { |
2733 | if (IS_ZEBRA_DEBUG_KERNEL) | |
2734 | zlog_debug("\tNo Destination Present"); | |
d62a17ae | 2735 | return 0; |
28bd0652 | 2736 | } |
d62a17ae | 2737 | |
2738 | if (IS_ZEBRA_IF_VXLAN(ifp)) | |
2739 | return zebra_vxlan_check_readd_remote_mac(ifp, br_if, &mac, | |
2740 | vid); | |
2741 | ||
2742 | return zebra_vxlan_local_mac_del(ifp, br_if, &mac, vid); | |
2232a77c | 2743 | } |
2744 | ||
2414abd3 | 2745 | static int netlink_macfdb_table(struct nlmsghdr *h, ns_id_t ns_id, int startup) |
2232a77c | 2746 | { |
d62a17ae | 2747 | int len; |
2748 | struct ndmsg *ndm; | |
2232a77c | 2749 | |
d62a17ae | 2750 | if (h->nlmsg_type != RTM_NEWNEIGH) |
2751 | return 0; | |
2232a77c | 2752 | |
d62a17ae | 2753 | /* Length validity. */ |
2754 | len = h->nlmsg_len - NLMSG_LENGTH(sizeof(struct ndmsg)); | |
2755 | if (len < 0) | |
2756 | return -1; | |
2232a77c | 2757 | |
d62a17ae | 2758 | /* We are interested only in AF_BRIDGE notifications. */ |
2759 | ndm = NLMSG_DATA(h); | |
2760 | if (ndm->ndm_family != AF_BRIDGE) | |
2761 | return 0; | |
2232a77c | 2762 | |
2414abd3 | 2763 | return netlink_macfdb_change(h, len, ns_id); |
2232a77c | 2764 | } |
2765 | ||
2766 | /* Request for MAC FDB information from the kernel */ | |
85a75f1e MS |
2767 | static int netlink_request_macs(struct nlsock *netlink_cmd, int family, |
2768 | int type, ifindex_t master_ifindex) | |
2232a77c | 2769 | { |
d62a17ae | 2770 | struct { |
2771 | struct nlmsghdr n; | |
2772 | struct ifinfomsg ifm; | |
2773 | char buf[256]; | |
2774 | } req; | |
2775 | ||
2776 | /* Form the request, specifying filter (rtattr) if needed. */ | |
2777 | memset(&req, 0, sizeof(req)); | |
2778 | req.n.nlmsg_type = type; | |
718f9b0f | 2779 | req.n.nlmsg_flags = NLM_F_ROOT | NLM_F_MATCH | NLM_F_REQUEST; |
d62a17ae | 2780 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg)); |
2781 | req.ifm.ifi_family = family; | |
2782 | if (master_ifindex) | |
2783 | addattr32(&req.n, sizeof(req), IFLA_MASTER, master_ifindex); | |
2784 | ||
85a75f1e | 2785 | return netlink_request(netlink_cmd, &req.n); |
2232a77c | 2786 | } |
2787 | ||
2788 | /* | |
2789 | * MAC forwarding database read using netlink interface. This is invoked | |
2790 | * at startup. | |
2791 | */ | |
d62a17ae | 2792 | int netlink_macfdb_read(struct zebra_ns *zns) |
2232a77c | 2793 | { |
d62a17ae | 2794 | int ret; |
85a75f1e MS |
2795 | struct zebra_dplane_info dp_info; |
2796 | ||
2797 | zebra_dplane_info_from_zns(&dp_info, zns, true /*is_cmd*/); | |
d62a17ae | 2798 | |
2799 | /* Get bridge FDB table. */ | |
85a75f1e MS |
2800 | ret = netlink_request_macs(&zns->netlink_cmd, AF_BRIDGE, RTM_GETNEIGH, |
2801 | 0); | |
d62a17ae | 2802 | if (ret < 0) |
2803 | return ret; | |
2804 | /* We are reading entire table. */ | |
2805 | filter_vlan = 0; | |
85a75f1e MS |
2806 | ret = netlink_parse_info(netlink_macfdb_table, &zns->netlink_cmd, |
2807 | &dp_info, 0, 1); | |
d62a17ae | 2808 | |
2809 | return ret; | |
2232a77c | 2810 | } |
2811 | ||
2812 | /* | |
2813 | * MAC forwarding database read using netlink interface. This is for a | |
2814 | * specific bridge and matching specific access VLAN (if VLAN-aware bridge). | |
2815 | */ | |
d62a17ae | 2816 | int netlink_macfdb_read_for_bridge(struct zebra_ns *zns, struct interface *ifp, |
2817 | struct interface *br_if) | |
2232a77c | 2818 | { |
d62a17ae | 2819 | struct zebra_if *br_zif; |
2820 | struct zebra_if *zif; | |
2821 | struct zebra_l2info_vxlan *vxl; | |
85a75f1e | 2822 | struct zebra_dplane_info dp_info; |
d62a17ae | 2823 | int ret = 0; |
2824 | ||
85a75f1e | 2825 | zebra_dplane_info_from_zns(&dp_info, zns, true /*is_cmd*/); |
d62a17ae | 2826 | |
2827 | /* Save VLAN we're filtering on, if needed. */ | |
2828 | br_zif = (struct zebra_if *)br_if->info; | |
2829 | zif = (struct zebra_if *)ifp->info; | |
2830 | vxl = &zif->l2info.vxl; | |
2831 | if (IS_ZEBRA_IF_BRIDGE_VLAN_AWARE(br_zif)) | |
2832 | filter_vlan = vxl->access_vlan; | |
2833 | ||
2834 | /* Get bridge FDB table for specific bridge - we do the VLAN filtering. | |
2835 | */ | |
85a75f1e | 2836 | ret = netlink_request_macs(&zns->netlink_cmd, AF_BRIDGE, RTM_GETNEIGH, |
d62a17ae | 2837 | br_if->ifindex); |
2838 | if (ret < 0) | |
2839 | return ret; | |
85a75f1e MS |
2840 | ret = netlink_parse_info(netlink_macfdb_table, &zns->netlink_cmd, |
2841 | &dp_info, 0, 0); | |
d62a17ae | 2842 | |
2843 | /* Reset VLAN filter. */ | |
2844 | filter_vlan = 0; | |
2845 | return ret; | |
2232a77c | 2846 | } |
2847 | ||
67fb9374 CS |
2848 | |
2849 | /* Request for MAC FDB for a specific MAC address in VLAN from the kernel */ | |
2850 | static int netlink_request_specific_mac_in_bridge(struct zebra_ns *zns, | |
2851 | int family, | |
2852 | int type, | |
2853 | struct interface *br_if, | |
2854 | struct ethaddr *mac, | |
2855 | vlanid_t vid) | |
2856 | { | |
2857 | struct { | |
2858 | struct nlmsghdr n; | |
2859 | struct ndmsg ndm; | |
2860 | char buf[256]; | |
2861 | } req; | |
2862 | struct zebra_if *br_zif; | |
2863 | char buf[ETHER_ADDR_STRLEN]; | |
2864 | ||
2865 | memset(&req, 0, sizeof(req)); | |
2866 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)); | |
2867 | req.n.nlmsg_type = type; /* RTM_GETNEIGH */ | |
2868 | req.n.nlmsg_flags = NLM_F_REQUEST; | |
2869 | req.ndm.ndm_family = family; /* AF_BRIDGE */ | |
2870 | /* req.ndm.ndm_state = NUD_REACHABLE; */ | |
2871 | ||
2872 | addattr_l(&req.n, sizeof(req), NDA_LLADDR, mac, 6); | |
2873 | ||
2874 | br_zif = (struct zebra_if *)br_if->info; | |
2875 | if (IS_ZEBRA_IF_BRIDGE_VLAN_AWARE(br_zif) && vid > 0) | |
2876 | addattr16(&req.n, sizeof(req), NDA_VLAN, vid); | |
2877 | ||
2878 | addattr32(&req.n, sizeof(req), NDA_MASTER, br_if->ifindex); | |
2879 | ||
2880 | if (IS_ZEBRA_DEBUG_KERNEL) | |
2881 | zlog_debug("%s: Tx family %s IF %s(%u) MAC %s vid %u", | |
2882 | __PRETTY_FUNCTION__, | |
2883 | nl_family_to_str(req.ndm.ndm_family), br_if->name, | |
2884 | br_if->ifindex, | |
2885 | prefix_mac2str(mac, buf, sizeof(buf)), vid); | |
2886 | ||
2887 | return netlink_request(&zns->netlink_cmd, &req.n); | |
2888 | } | |
2889 | ||
2890 | int netlink_macfdb_read_specific_mac(struct zebra_ns *zns, | |
2891 | struct interface *br_if, | |
2892 | struct ethaddr *mac, vlanid_t vid) | |
2893 | { | |
2894 | int ret = 0; | |
2895 | struct zebra_dplane_info dp_info; | |
2896 | ||
2897 | zebra_dplane_info_from_zns(&dp_info, zns, true /*is_cmd*/); | |
2898 | ||
2899 | /* Get bridge FDB table for specific bridge - we do the VLAN filtering. | |
2900 | */ | |
2901 | ret = netlink_request_specific_mac_in_bridge(zns, AF_BRIDGE, | |
2902 | RTM_GETNEIGH, | |
2903 | br_if, mac, vid); | |
2904 | if (ret < 0) | |
2905 | return ret; | |
2906 | ||
2907 | ret = netlink_parse_info(netlink_macfdb_table, &zns->netlink_cmd, | |
2908 | &dp_info, 1, 0); | |
2909 | ||
2910 | return ret; | |
2911 | } | |
036d93c0 MS |
2912 | |
2913 | /* | |
2914 | * Netlink-specific handler for MAC updates using dataplane context object. | |
2915 | */ | |
2916 | static enum zebra_dplane_result | |
2917 | netlink_macfdb_update_ctx(struct zebra_dplane_ctx *ctx) | |
2232a77c | 2918 | { |
f3dbec60 | 2919 | uint8_t protocol = RTPROT_ZEBRA; |
d62a17ae | 2920 | struct { |
2921 | struct nlmsghdr n; | |
2922 | struct ndmsg ndm; | |
2923 | char buf[256]; | |
2924 | } req; | |
036d93c0 | 2925 | int ret; |
d62a17ae | 2926 | int dst_alen; |
36590076 | 2927 | int vid_present = 0; |
036d93c0 MS |
2928 | int cmd; |
2929 | struct in_addr vtep_ip; | |
2930 | vlanid_t vid; | |
2931 | ||
2932 | if (dplane_ctx_get_op(ctx) == DPLANE_OP_MAC_INSTALL) | |
2933 | cmd = RTM_NEWNEIGH; | |
2934 | else | |
2935 | cmd = RTM_DELNEIGH; | |
2936 | ||
5605ecfc | 2937 | memset(&req, 0, sizeof(req)); |
d62a17ae | 2938 | |
2939 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)); | |
2940 | req.n.nlmsg_flags = NLM_F_REQUEST; | |
2941 | if (cmd == RTM_NEWNEIGH) | |
2942 | req.n.nlmsg_flags |= (NLM_F_CREATE | NLM_F_REPLACE); | |
2943 | req.n.nlmsg_type = cmd; | |
2944 | req.ndm.ndm_family = AF_BRIDGE; | |
2945 | req.ndm.ndm_flags |= NTF_SELF | NTF_MASTER; | |
2946 | req.ndm.ndm_state = NUD_REACHABLE; | |
2947 | ||
036d93c0 | 2948 | if (dplane_ctx_mac_is_sticky(ctx)) |
d62a17ae | 2949 | req.ndm.ndm_state |= NUD_NOARP; |
2950 | else | |
2951 | req.ndm.ndm_flags |= NTF_EXT_LEARNED; | |
2952 | ||
f3dbec60 DS |
2953 | addattr_l(&req.n, sizeof(req), |
2954 | NDA_PROTOCOL, &protocol, sizeof(protocol)); | |
036d93c0 MS |
2955 | addattr_l(&req.n, sizeof(req), NDA_LLADDR, |
2956 | dplane_ctx_mac_get_addr(ctx), 6); | |
478566d6 | 2957 | req.ndm.ndm_ifindex = dplane_ctx_get_ifindex(ctx); |
036d93c0 | 2958 | |
d63c1b18 | 2959 | dst_alen = 4; // TODO: hardcoded |
036d93c0 | 2960 | vtep_ip = *(dplane_ctx_mac_get_vtep_ip(ctx)); |
d63c1b18 | 2961 | addattr_l(&req.n, sizeof(req), NDA_DST, &vtep_ip, dst_alen); |
036d93c0 | 2962 | |
478566d6 MS |
2963 | vid = dplane_ctx_mac_get_vlan(ctx); |
2964 | ||
2965 | if (vid > 0) { | |
d62a17ae | 2966 | addattr16(&req.n, sizeof(req), NDA_VLAN, vid); |
2967 | vid_present = 1; | |
d62a17ae | 2968 | } |
478566d6 MS |
2969 | addattr32(&req.n, sizeof(req), NDA_MASTER, |
2970 | dplane_ctx_mac_get_br_ifindex(ctx)); | |
d62a17ae | 2971 | |
036d93c0 MS |
2972 | if (IS_ZEBRA_DEBUG_KERNEL) { |
2973 | char ipbuf[PREFIX_STRLEN]; | |
2974 | char buf[ETHER_ADDR_STRLEN]; | |
2975 | char dst_buf[PREFIX_STRLEN + 10]; | |
478566d6 MS |
2976 | char vid_buf[20]; |
2977 | ||
2978 | if (vid_present) | |
2979 | snprintf(vid_buf, sizeof(vid_buf), " VLAN %u", vid); | |
2980 | else | |
2981 | vid_buf[0] = '\0'; | |
036d93c0 MS |
2982 | |
2983 | inet_ntop(AF_INET, &vtep_ip, ipbuf, sizeof(ipbuf)); | |
2984 | snprintf(dst_buf, sizeof(dst_buf), " dst %s", ipbuf); | |
2985 | prefix_mac2str(dplane_ctx_mac_get_addr(ctx), buf, sizeof(buf)); | |
2986 | ||
d62a17ae | 2987 | zlog_debug("Tx %s family %s IF %s(%u)%s %sMAC %s%s", |
2988 | nl_msg_type_to_str(cmd), | |
478566d6 MS |
2989 | nl_family_to_str(req.ndm.ndm_family), |
2990 | dplane_ctx_get_ifname(ctx), | |
2991 | dplane_ctx_get_ifindex(ctx), vid_buf, | |
036d93c0 MS |
2992 | dplane_ctx_mac_is_sticky(ctx) ? "sticky " : "", |
2993 | buf, dst_buf); | |
2994 | } | |
d62a17ae | 2995 | |
036d93c0 MS |
2996 | ret = netlink_talk_info(netlink_talk_filter, &req.n, |
2997 | dplane_ctx_get_ns(ctx), 0); | |
2998 | if (ret == 0) | |
2999 | return ZEBRA_DPLANE_REQUEST_SUCCESS; | |
3000 | else | |
3001 | return ZEBRA_DPLANE_REQUEST_FAILURE; | |
2232a77c | 3002 | } |
3003 | ||
f17b99ed DS |
3004 | /* |
3005 | * In the event the kernel deletes ipv4 link-local neighbor entries created for | |
3006 | * 5549 support, re-install them. | |
3007 | */ | |
3008 | static void netlink_handle_5549(struct ndmsg *ndm, struct zebra_if *zif, | |
9b036974 DS |
3009 | struct interface *ifp, struct ipaddr *ip, |
3010 | bool handle_failed) | |
f17b99ed DS |
3011 | { |
3012 | if (ndm->ndm_family != AF_INET) | |
3013 | return; | |
3014 | ||
3015 | if (!zif->v6_2_v4_ll_neigh_entry) | |
3016 | return; | |
3017 | ||
3018 | if (ipv4_ll.s_addr != ip->ip._v4_addr.s_addr) | |
3019 | return; | |
3020 | ||
9b036974 DS |
3021 | if (handle_failed && ndm->ndm_state & NUD_FAILED) { |
3022 | zlog_info("Neighbor Entry for %s has entered a failed state, not reinstalling", | |
3023 | ifp->name); | |
3024 | return; | |
3025 | } | |
3026 | ||
f17b99ed DS |
3027 | if_nbr_ipv6ll_to_ipv4ll_neigh_update(ifp, &zif->v6_2_v4_ll_addr6, true); |
3028 | } | |
3029 | ||
d62a17ae | 3030 | #define NUD_VALID \ |
3031 | (NUD_PERMANENT | NUD_NOARP | NUD_REACHABLE | NUD_PROBE | NUD_STALE \ | |
3032 | | NUD_DELAY) | |
2232a77c | 3033 | |
2414abd3 | 3034 | static int netlink_ipneigh_change(struct nlmsghdr *h, int len, ns_id_t ns_id) |
2232a77c | 3035 | { |
d62a17ae | 3036 | struct ndmsg *ndm; |
3037 | struct interface *ifp; | |
3038 | struct zebra_if *zif; | |
d62a17ae | 3039 | struct rtattr *tb[NDA_MAX + 1]; |
3040 | struct interface *link_if; | |
3041 | struct ethaddr mac; | |
3042 | struct ipaddr ip; | |
3043 | char buf[ETHER_ADDR_STRLEN]; | |
3044 | char buf2[INET6_ADDRSTRLEN]; | |
3045 | int mac_present = 0; | |
a37f4598 | 3046 | bool is_ext; |
3047 | bool is_router; | |
d62a17ae | 3048 | |
3049 | ndm = NLMSG_DATA(h); | |
3050 | ||
3051 | /* The interface should exist. */ | |
5895d33f | 3052 | ifp = if_lookup_by_index_per_ns(zebra_ns_lookup(ns_id), |
d62a17ae | 3053 | ndm->ndm_ifindex); |
2853fed6 | 3054 | if (!ifp || !ifp->info) |
d62a17ae | 3055 | return 0; |
3056 | ||
20089ae2 DS |
3057 | zif = (struct zebra_if *)ifp->info; |
3058 | ||
3059 | /* Parse attributes and extract fields of interest. */ | |
3060 | memset(tb, 0, sizeof tb); | |
3061 | netlink_parse_rtattr(tb, NDA_MAX, NDA_RTA(ndm), len); | |
3062 | ||
3063 | if (!tb[NDA_DST]) { | |
9df414fe QY |
3064 | zlog_debug("%s family %s IF %s(%u) - no DST", |
3065 | nl_msg_type_to_str(h->nlmsg_type), | |
3066 | nl_family_to_str(ndm->ndm_family), ifp->name, | |
3067 | ndm->ndm_ifindex); | |
d62a17ae | 3068 | return 0; |
20089ae2 DS |
3069 | } |
3070 | ||
3071 | memset(&ip, 0, sizeof(struct ipaddr)); | |
3072 | ip.ipa_type = (ndm->ndm_family == AF_INET) ? IPADDR_V4 : IPADDR_V6; | |
3073 | memcpy(&ip.ip.addr, RTA_DATA(tb[NDA_DST]), RTA_PAYLOAD(tb[NDA_DST])); | |
3074 | ||
f17b99ed DS |
3075 | /* if kernel deletes our rfc5549 neighbor entry, re-install it */ |
3076 | if (h->nlmsg_type == RTM_DELNEIGH && (ndm->ndm_state & NUD_PERMANENT)) { | |
9b036974 | 3077 | netlink_handle_5549(ndm, zif, ifp, &ip, false); |
28bd0652 DS |
3078 | if (IS_ZEBRA_DEBUG_KERNEL) |
3079 | zlog_debug( | |
3080 | "\tNeighbor Entry Received is a 5549 entry, finished"); | |
20089ae2 DS |
3081 | return 0; |
3082 | } | |
d62a17ae | 3083 | |
f17b99ed | 3084 | /* if kernel marks our rfc5549 neighbor entry invalid, re-install it */ |
9b036974 DS |
3085 | if (h->nlmsg_type == RTM_NEWNEIGH && !(ndm->ndm_state & NUD_VALID)) |
3086 | netlink_handle_5549(ndm, zif, ifp, &ip, true); | |
f17b99ed | 3087 | |
d62a17ae | 3088 | /* The neighbor is present on an SVI. From this, we locate the |
3089 | * underlying | |
3090 | * bridge because we're only interested in neighbors on a VxLAN bridge. | |
3091 | * The bridge is located based on the nature of the SVI: | |
3092 | * (a) In the case of a VLAN-aware bridge, the SVI is a L3 VLAN | |
3093 | * interface | |
3094 | * and is linked to the bridge | |
3095 | * (b) In the case of a VLAN-unaware bridge, the SVI is the bridge | |
3096 | * inteface | |
3097 | * itself | |
3098 | */ | |
3099 | if (IS_ZEBRA_IF_VLAN(ifp)) { | |
5895d33f | 3100 | link_if = if_lookup_by_index_per_ns(zebra_ns_lookup(ns_id), |
71349e03 | 3101 | zif->link_ifindex); |
d62a17ae | 3102 | if (!link_if) |
3103 | return 0; | |
3104 | } else if (IS_ZEBRA_IF_BRIDGE(ifp)) | |
3105 | link_if = ifp; | |
28bd0652 DS |
3106 | else { |
3107 | if (IS_ZEBRA_DEBUG_KERNEL) | |
3108 | zlog_debug( | |
3109 | "\tNeighbor Entry received is not on a VLAN or a BRIDGE, ignoring"); | |
d62a17ae | 3110 | return 0; |
28bd0652 | 3111 | } |
d62a17ae | 3112 | |
d62a17ae | 3113 | memset(&mac, 0, sizeof(struct ethaddr)); |
d62a17ae | 3114 | if (h->nlmsg_type == RTM_NEWNEIGH) { |
3115 | if (tb[NDA_LLADDR]) { | |
ff8b7eb8 | 3116 | if (RTA_PAYLOAD(tb[NDA_LLADDR]) != ETH_ALEN) { |
28bd0652 DS |
3117 | if (IS_ZEBRA_DEBUG_KERNEL) |
3118 | zlog_debug( | |
3119 | "%s family %s IF %s(%u) - LLADDR is not MAC, len %lu", | |
3120 | nl_msg_type_to_str( | |
3121 | h->nlmsg_type), | |
3122 | nl_family_to_str( | |
3123 | ndm->ndm_family), | |
3124 | ifp->name, ndm->ndm_ifindex, | |
3125 | (unsigned long)RTA_PAYLOAD( | |
3126 | tb[NDA_LLADDR])); | |
d62a17ae | 3127 | return 0; |
3128 | } | |
3129 | ||
3130 | mac_present = 1; | |
ff8b7eb8 | 3131 | memcpy(&mac, RTA_DATA(tb[NDA_LLADDR]), ETH_ALEN); |
d62a17ae | 3132 | } |
3133 | ||
a37f4598 | 3134 | is_ext = !!(ndm->ndm_flags & NTF_EXT_LEARNED); |
3135 | is_router = !!(ndm->ndm_flags & NTF_ROUTER); | |
d62a17ae | 3136 | |
3137 | if (IS_ZEBRA_DEBUG_KERNEL) | |
3138 | zlog_debug( | |
3139 | "Rx %s family %s IF %s(%u) IP %s MAC %s state 0x%x flags 0x%x", | |
3140 | nl_msg_type_to_str(h->nlmsg_type), | |
3141 | nl_family_to_str(ndm->ndm_family), ifp->name, | |
3142 | ndm->ndm_ifindex, | |
3143 | ipaddr2str(&ip, buf2, sizeof(buf2)), | |
3144 | mac_present | |
3145 | ? prefix_mac2str(&mac, buf, sizeof(buf)) | |
3146 | : "", | |
3147 | ndm->ndm_state, ndm->ndm_flags); | |
3148 | ||
3149 | /* If the neighbor state is valid for use, process as an add or | |
3150 | * update | |
3151 | * else process as a delete. Note that the delete handling may | |
3152 | * result | |
3153 | * in re-adding the neighbor if it is a valid "remote" neighbor. | |
3154 | */ | |
3155 | if (ndm->ndm_state & NUD_VALID) | |
ee69da27 | 3156 | return zebra_vxlan_handle_kernel_neigh_update( |
d62a17ae | 3157 | ifp, link_if, &ip, &mac, ndm->ndm_state, |
a37f4598 | 3158 | is_ext, is_router); |
d62a17ae | 3159 | |
ee69da27 | 3160 | return zebra_vxlan_handle_kernel_neigh_del(ifp, link_if, &ip); |
d62a17ae | 3161 | } |
3162 | ||
3163 | if (IS_ZEBRA_DEBUG_KERNEL) | |
3164 | zlog_debug("Rx %s family %s IF %s(%u) IP %s", | |
3165 | nl_msg_type_to_str(h->nlmsg_type), | |
3166 | nl_family_to_str(ndm->ndm_family), ifp->name, | |
3167 | ndm->ndm_ifindex, | |
3168 | ipaddr2str(&ip, buf2, sizeof(buf2))); | |
3169 | ||
3170 | /* Process the delete - it may result in re-adding the neighbor if it is | |
3171 | * a valid "remote" neighbor. | |
3172 | */ | |
ee69da27 | 3173 | return zebra_vxlan_handle_kernel_neigh_del(ifp, link_if, &ip); |
2232a77c | 3174 | } |
3175 | ||
2414abd3 | 3176 | static int netlink_neigh_table(struct nlmsghdr *h, ns_id_t ns_id, int startup) |
2232a77c | 3177 | { |
d62a17ae | 3178 | int len; |
3179 | struct ndmsg *ndm; | |
2232a77c | 3180 | |
d62a17ae | 3181 | if (h->nlmsg_type != RTM_NEWNEIGH) |
3182 | return 0; | |
2232a77c | 3183 | |
d62a17ae | 3184 | /* Length validity. */ |
3185 | len = h->nlmsg_len - NLMSG_LENGTH(sizeof(struct ndmsg)); | |
3186 | if (len < 0) | |
3187 | return -1; | |
2232a77c | 3188 | |
d62a17ae | 3189 | /* We are interested only in AF_INET or AF_INET6 notifications. */ |
3190 | ndm = NLMSG_DATA(h); | |
3191 | if (ndm->ndm_family != AF_INET && ndm->ndm_family != AF_INET6) | |
3192 | return 0; | |
2232a77c | 3193 | |
2414abd3 | 3194 | return netlink_neigh_change(h, len); |
2232a77c | 3195 | } |
3196 | ||
3197 | /* Request for IP neighbor information from the kernel */ | |
85a75f1e MS |
3198 | static int netlink_request_neigh(struct nlsock *netlink_cmd, int family, |
3199 | int type, ifindex_t ifindex) | |
2232a77c | 3200 | { |
d62a17ae | 3201 | struct { |
3202 | struct nlmsghdr n; | |
3203 | struct ndmsg ndm; | |
3204 | char buf[256]; | |
3205 | } req; | |
3206 | ||
3207 | /* Form the request, specifying filter (rtattr) if needed. */ | |
3208 | memset(&req, 0, sizeof(req)); | |
3209 | req.n.nlmsg_type = type; | |
718f9b0f | 3210 | req.n.nlmsg_flags = NLM_F_ROOT | NLM_F_MATCH | NLM_F_REQUEST; |
d62a17ae | 3211 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)); |
3212 | req.ndm.ndm_family = family; | |
3213 | if (ifindex) | |
3214 | addattr32(&req.n, sizeof(req), NDA_IFINDEX, ifindex); | |
3215 | ||
85a75f1e | 3216 | return netlink_request(netlink_cmd, &req.n); |
2232a77c | 3217 | } |
3218 | ||
3219 | /* | |
3220 | * IP Neighbor table read using netlink interface. This is invoked | |
3221 | * at startup. | |
3222 | */ | |
d62a17ae | 3223 | int netlink_neigh_read(struct zebra_ns *zns) |
2232a77c | 3224 | { |
d62a17ae | 3225 | int ret; |
85a75f1e MS |
3226 | struct zebra_dplane_info dp_info; |
3227 | ||
3228 | zebra_dplane_info_from_zns(&dp_info, zns, true /*is_cmd*/); | |
2232a77c | 3229 | |
d62a17ae | 3230 | /* Get IP neighbor table. */ |
85a75f1e MS |
3231 | ret = netlink_request_neigh(&zns->netlink_cmd, AF_UNSPEC, RTM_GETNEIGH, |
3232 | 0); | |
d62a17ae | 3233 | if (ret < 0) |
3234 | return ret; | |
85a75f1e MS |
3235 | ret = netlink_parse_info(netlink_neigh_table, &zns->netlink_cmd, |
3236 | &dp_info, 0, 1); | |
2232a77c | 3237 | |
d62a17ae | 3238 | return ret; |
2232a77c | 3239 | } |
3240 | ||
3241 | /* | |
3242 | * IP Neighbor table read using netlink interface. This is for a specific | |
3243 | * VLAN device. | |
3244 | */ | |
d62a17ae | 3245 | int netlink_neigh_read_for_vlan(struct zebra_ns *zns, struct interface *vlan_if) |
2232a77c | 3246 | { |
d62a17ae | 3247 | int ret = 0; |
85a75f1e MS |
3248 | struct zebra_dplane_info dp_info; |
3249 | ||
3250 | zebra_dplane_info_from_zns(&dp_info, zns, true /*is_cmd*/); | |
2232a77c | 3251 | |
85a75f1e | 3252 | ret = netlink_request_neigh(&zns->netlink_cmd, AF_UNSPEC, RTM_GETNEIGH, |
d62a17ae | 3253 | vlan_if->ifindex); |
3254 | if (ret < 0) | |
3255 | return ret; | |
85a75f1e MS |
3256 | ret = netlink_parse_info(netlink_neigh_table, &zns->netlink_cmd, |
3257 | &dp_info, 0, 0); | |
2232a77c | 3258 | |
d62a17ae | 3259 | return ret; |
2232a77c | 3260 | } |
3261 | ||
67fb9374 CS |
3262 | /* |
3263 | * Request for a specific IP in VLAN (SVI) device from IP Neighbor table, | |
3264 | * read using netlink interface. | |
3265 | */ | |
3266 | static int netlink_request_specific_neigh_in_vlan(struct zebra_ns *zns, | |
3267 | int type, struct ipaddr *ip, | |
3268 | ifindex_t ifindex) | |
3269 | { | |
3270 | struct { | |
3271 | struct nlmsghdr n; | |
3272 | struct ndmsg ndm; | |
3273 | char buf[256]; | |
3274 | } req; | |
3275 | int ipa_len; | |
3276 | ||
3277 | /* Form the request, specifying filter (rtattr) if needed. */ | |
3278 | memset(&req, 0, sizeof(req)); | |
3279 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)); | |
3280 | req.n.nlmsg_flags = NLM_F_REQUEST; | |
3281 | req.n.nlmsg_type = type; /* RTM_GETNEIGH */ | |
3282 | req.ndm.ndm_ifindex = ifindex; | |
3283 | ||
3284 | if (IS_IPADDR_V4(ip)) { | |
3285 | ipa_len = IPV4_MAX_BYTELEN; | |
3286 | req.ndm.ndm_family = AF_INET; | |
3287 | ||
3288 | } else { | |
3289 | ipa_len = IPV6_MAX_BYTELEN; | |
3290 | req.ndm.ndm_family = AF_INET6; | |
3291 | } | |
3292 | ||
3293 | addattr_l(&req.n, sizeof(req), NDA_DST, &ip->ip.addr, ipa_len); | |
3294 | ||
3295 | return netlink_request(&zns->netlink_cmd, &req.n); | |
3296 | } | |
3297 | ||
3298 | int netlink_neigh_read_specific_ip(struct ipaddr *ip, | |
3299 | struct interface *vlan_if) | |
3300 | { | |
3301 | int ret = 0; | |
3302 | struct zebra_ns *zns; | |
3303 | struct zebra_vrf *zvrf = zebra_vrf_lookup_by_id(vlan_if->vrf_id); | |
3304 | char buf[INET6_ADDRSTRLEN]; | |
3305 | struct zebra_dplane_info dp_info; | |
3306 | ||
3307 | zns = zvrf->zns; | |
3308 | ||
3309 | zebra_dplane_info_from_zns(&dp_info, zns, true /*is_cmd*/); | |
3310 | ||
3311 | if (IS_ZEBRA_DEBUG_KERNEL) | |
3312 | zlog_debug("%s: neigh request IF %s(%u) IP %s vrf_id %u", | |
3313 | __PRETTY_FUNCTION__, vlan_if->name, | |
3314 | vlan_if->ifindex, | |
3315 | ipaddr2str(ip, buf, sizeof(buf)), | |
3316 | vlan_if->vrf_id); | |
3317 | ||
3318 | ret = netlink_request_specific_neigh_in_vlan(zns, RTM_GETNEIGH, ip, | |
3319 | vlan_if->ifindex); | |
3320 | if (ret < 0) | |
3321 | return ret; | |
3322 | ||
3323 | ret = netlink_parse_info(netlink_neigh_table, &zns->netlink_cmd, | |
3324 | &dp_info, 1, 0); | |
3325 | ||
3326 | return ret; | |
3327 | } | |
3328 | ||
2414abd3 | 3329 | int netlink_neigh_change(struct nlmsghdr *h, ns_id_t ns_id) |
2232a77c | 3330 | { |
d62a17ae | 3331 | int len; |
3332 | struct ndmsg *ndm; | |
2232a77c | 3333 | |
d62a17ae | 3334 | if (!(h->nlmsg_type == RTM_NEWNEIGH || h->nlmsg_type == RTM_DELNEIGH)) |
3335 | return 0; | |
2232a77c | 3336 | |
d62a17ae | 3337 | /* Length validity. */ |
3338 | len = h->nlmsg_len - NLMSG_LENGTH(sizeof(struct ndmsg)); | |
9bdf8618 DS |
3339 | if (len < 0) { |
3340 | zlog_err("%s: Message received from netlink is of a broken size %d %zu", | |
3341 | __PRETTY_FUNCTION__, h->nlmsg_len, | |
3342 | (size_t)NLMSG_LENGTH(sizeof(struct ndmsg))); | |
d62a17ae | 3343 | return -1; |
9bdf8618 | 3344 | } |
2232a77c | 3345 | |
d62a17ae | 3346 | /* Is this a notification for the MAC FDB or IP neighbor table? */ |
3347 | ndm = NLMSG_DATA(h); | |
3348 | if (ndm->ndm_family == AF_BRIDGE) | |
2414abd3 | 3349 | return netlink_macfdb_change(h, len, ns_id); |
2232a77c | 3350 | |
d62a17ae | 3351 | if (ndm->ndm_type != RTN_UNICAST) |
3352 | return 0; | |
2232a77c | 3353 | |
d62a17ae | 3354 | if (ndm->ndm_family == AF_INET || ndm->ndm_family == AF_INET6) |
2414abd3 | 3355 | return netlink_ipneigh_change(h, len, ns_id); |
8a1b681c | 3356 | else { |
9df414fe | 3357 | flog_warn( |
e914ccbe | 3358 | EC_ZEBRA_UNKNOWN_FAMILY, |
87b5d1b0 DS |
3359 | "Invalid address family: %u received from kernel neighbor change: %s", |
3360 | ndm->ndm_family, nl_msg_type_to_str(h->nlmsg_type)); | |
8a1b681c SW |
3361 | return 0; |
3362 | } | |
2232a77c | 3363 | |
d62a17ae | 3364 | return 0; |
2232a77c | 3365 | } |
3366 | ||
931fa60c MS |
3367 | /* |
3368 | * Utility neighbor-update function, using info from dplane context. | |
3369 | */ | |
3370 | static int netlink_neigh_update_ctx(const struct zebra_dplane_ctx *ctx, | |
3371 | int cmd) | |
2232a77c | 3372 | { |
f3dbec60 | 3373 | uint8_t protocol = RTPROT_ZEBRA; |
d62a17ae | 3374 | struct { |
3375 | struct nlmsghdr n; | |
3376 | struct ndmsg ndm; | |
3377 | char buf[256]; | |
3378 | } req; | |
3379 | int ipa_len; | |
d62a17ae | 3380 | char buf[INET6_ADDRSTRLEN]; |
3381 | char buf2[ETHER_ADDR_STRLEN]; | |
931fa60c MS |
3382 | const struct ipaddr *ip; |
3383 | const struct ethaddr *mac; | |
3384 | uint8_t flags; | |
3385 | uint16_t state; | |
d62a17ae | 3386 | |
5605ecfc | 3387 | memset(&req, 0, sizeof(req)); |
d62a17ae | 3388 | |
931fa60c MS |
3389 | ip = dplane_ctx_neigh_get_ipaddr(ctx); |
3390 | mac = dplane_ctx_neigh_get_mac(ctx); | |
3391 | if (is_zero_mac(mac)) | |
3392 | mac = NULL; | |
3393 | ||
3394 | flags = neigh_flags_to_netlink(dplane_ctx_neigh_get_flags(ctx)); | |
3395 | state = neigh_state_to_netlink(dplane_ctx_neigh_get_state(ctx)); | |
3396 | ||
d62a17ae | 3397 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)); |
3398 | req.n.nlmsg_flags = NLM_F_REQUEST; | |
3399 | if (cmd == RTM_NEWNEIGH) | |
3400 | req.n.nlmsg_flags |= (NLM_F_CREATE | NLM_F_REPLACE); | |
3401 | req.n.nlmsg_type = cmd; // RTM_NEWNEIGH or RTM_DELNEIGH | |
3402 | req.ndm.ndm_family = IS_IPADDR_V4(ip) ? AF_INET : AF_INET6; | |
68e33151 | 3403 | req.ndm.ndm_state = state; |
931fa60c | 3404 | req.ndm.ndm_ifindex = dplane_ctx_get_ifindex(ctx); |
d62a17ae | 3405 | req.ndm.ndm_type = RTN_UNICAST; |
68e33151 | 3406 | req.ndm.ndm_flags = flags; |
d62a17ae | 3407 | |
f3dbec60 DS |
3408 | addattr_l(&req.n, sizeof(req), |
3409 | NDA_PROTOCOL, &protocol, sizeof(protocol)); | |
d62a17ae | 3410 | ipa_len = IS_IPADDR_V4(ip) ? IPV4_MAX_BYTELEN : IPV6_MAX_BYTELEN; |
3411 | addattr_l(&req.n, sizeof(req), NDA_DST, &ip->ip.addr, ipa_len); | |
3412 | if (mac) | |
3413 | addattr_l(&req.n, sizeof(req), NDA_LLADDR, mac, 6); | |
3414 | ||
3415 | if (IS_ZEBRA_DEBUG_KERNEL) | |
6fe2b0e6 | 3416 | zlog_debug("Tx %s family %s IF %s(%u) Neigh %s MAC %s flags 0x%x state 0x%x", |
d62a17ae | 3417 | nl_msg_type_to_str(cmd), |
931fa60c MS |
3418 | nl_family_to_str(req.ndm.ndm_family), |
3419 | dplane_ctx_get_ifname(ctx), | |
3420 | dplane_ctx_get_ifindex(ctx), | |
3421 | ipaddr2str(ip, buf, sizeof(buf)), | |
d62a17ae | 3422 | mac ? prefix_mac2str(mac, buf2, sizeof(buf2)) |
931fa60c MS |
3423 | : "null", |
3424 | flags, state); | |
d62a17ae | 3425 | |
931fa60c MS |
3426 | return netlink_talk_info(netlink_talk_filter, &req.n, |
3427 | dplane_ctx_get_ns(ctx), 0); | |
2232a77c | 3428 | } |
3429 | ||
036d93c0 MS |
3430 | /* |
3431 | * Update MAC, using dataplane context object. | |
3432 | */ | |
3433 | enum zebra_dplane_result kernel_mac_update_ctx(struct zebra_dplane_ctx *ctx) | |
2232a77c | 3434 | { |
036d93c0 | 3435 | return netlink_macfdb_update_ctx(ctx); |
2232a77c | 3436 | } |
3437 | ||
931fa60c | 3438 | enum zebra_dplane_result kernel_neigh_update_ctx(struct zebra_dplane_ctx *ctx) |
2232a77c | 3439 | { |
931fa60c | 3440 | int ret = -1; |
2232a77c | 3441 | |
931fa60c MS |
3442 | switch (dplane_ctx_get_op(ctx)) { |
3443 | case DPLANE_OP_NEIGH_INSTALL: | |
3444 | case DPLANE_OP_NEIGH_UPDATE: | |
3445 | ret = netlink_neigh_update_ctx(ctx, RTM_NEWNEIGH); | |
3446 | break; | |
3447 | case DPLANE_OP_NEIGH_DELETE: | |
3448 | ret = netlink_neigh_update_ctx(ctx, RTM_DELNEIGH); | |
3449 | break; | |
0bbd4ff4 MS |
3450 | case DPLANE_OP_VTEP_ADD: |
3451 | ret = netlink_vxlan_flood_update_ctx(ctx, RTM_NEWNEIGH); | |
3452 | break; | |
3453 | case DPLANE_OP_VTEP_DELETE: | |
3454 | ret = netlink_vxlan_flood_update_ctx(ctx, RTM_DELNEIGH); | |
3455 | break; | |
931fa60c MS |
3456 | default: |
3457 | break; | |
3458 | } | |
2232a77c | 3459 | |
931fa60c MS |
3460 | return (ret == 0 ? |
3461 | ZEBRA_DPLANE_REQUEST_SUCCESS : ZEBRA_DPLANE_REQUEST_FAILURE); | |
6fe2b0e6 CS |
3462 | } |
3463 | ||
16c628de MS |
3464 | /* |
3465 | * MPLS label forwarding table change via netlink interface, using dataplane | |
3466 | * context information. | |
3467 | */ | |
fc608372 | 3468 | int netlink_mpls_multipath(int cmd, struct zebra_dplane_ctx *ctx) |
16c628de MS |
3469 | { |
3470 | mpls_lse_t lse; | |
81793ac1 | 3471 | const zebra_nhlfe_t *nhlfe; |
16c628de MS |
3472 | struct nexthop *nexthop = NULL; |
3473 | unsigned int nexthop_num; | |
3474 | const char *routedesc; | |
3475 | int route_type; | |
3476 | ||
3477 | struct { | |
3478 | struct nlmsghdr n; | |
3479 | struct rtmsg r; | |
3480 | char buf[NL_PKT_BUF_SIZE]; | |
3481 | } req; | |
3482 | ||
3483 | memset(&req, 0, sizeof(req) - NL_PKT_BUF_SIZE); | |
3484 | ||
3485 | /* | |
3486 | * Count # nexthops so we can decide whether to use singlepath | |
3487 | * or multipath case. | |
3488 | */ | |
3489 | nexthop_num = 0; | |
3490 | for (nhlfe = dplane_ctx_get_nhlfe(ctx); nhlfe; nhlfe = nhlfe->next) { | |
3491 | nexthop = nhlfe->nexthop; | |
3492 | if (!nexthop) | |
3493 | continue; | |
3494 | if (cmd == RTM_NEWROUTE) { | |
3495 | /* Count all selected NHLFEs */ | |
3496 | if (CHECK_FLAG(nhlfe->flags, NHLFE_FLAG_SELECTED) | |
3497 | && CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE)) | |
3498 | nexthop_num++; | |
3499 | } else { /* DEL */ | |
3500 | /* Count all installed NHLFEs */ | |
3501 | if (CHECK_FLAG(nhlfe->flags, NHLFE_FLAG_INSTALLED) | |
3502 | && CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB)) | |
3503 | nexthop_num++; | |
3504 | } | |
3505 | } | |
3506 | ||
3507 | if ((nexthop_num == 0) || | |
3508 | (!dplane_ctx_get_best_nhlfe(ctx) && (cmd != RTM_DELROUTE))) | |
3509 | return 0; | |
3510 | ||
3511 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)); | |
3512 | req.n.nlmsg_flags = NLM_F_CREATE | NLM_F_REQUEST; | |
3513 | req.n.nlmsg_type = cmd; | |
3514 | req.n.nlmsg_pid = dplane_ctx_get_ns(ctx)->nls.snl.nl_pid; | |
3515 | ||
3516 | req.r.rtm_family = AF_MPLS; | |
3517 | req.r.rtm_table = RT_TABLE_MAIN; | |
3518 | req.r.rtm_dst_len = MPLS_LABEL_LEN_BITS; | |
3519 | req.r.rtm_scope = RT_SCOPE_UNIVERSE; | |
3520 | req.r.rtm_type = RTN_UNICAST; | |
3521 | ||
3522 | if (cmd == RTM_NEWROUTE) { | |
3523 | /* We do a replace to handle update. */ | |
3524 | req.n.nlmsg_flags |= NLM_F_REPLACE; | |
3525 | ||
3526 | /* set the protocol value if installing */ | |
3527 | route_type = re_type_from_lsp_type( | |
3528 | dplane_ctx_get_best_nhlfe(ctx)->type); | |
3529 | req.r.rtm_protocol = zebra2proto(route_type); | |
3530 | } | |
3531 | ||
3532 | /* Fill destination */ | |
3533 | lse = mpls_lse_encode(dplane_ctx_get_in_label(ctx), 0, 0, 1); | |
3534 | addattr_l(&req.n, sizeof(req), RTA_DST, &lse, sizeof(mpls_lse_t)); | |
3535 | ||
3536 | /* Fill nexthops (paths) based on single-path or multipath. The paths | |
3537 | * chosen depend on the operation. | |
3538 | */ | |
fc608372 | 3539 | if (nexthop_num == 1) { |
16c628de MS |
3540 | routedesc = "single-path"; |
3541 | _netlink_mpls_debug(cmd, dplane_ctx_get_in_label(ctx), | |
3542 | routedesc); | |
3543 | ||
3544 | nexthop_num = 0; | |
3545 | for (nhlfe = dplane_ctx_get_nhlfe(ctx); | |
3546 | nhlfe; nhlfe = nhlfe->next) { | |
3547 | nexthop = nhlfe->nexthop; | |
3548 | if (!nexthop) | |
3549 | continue; | |
3550 | ||
3551 | if ((cmd == RTM_NEWROUTE | |
3552 | && (CHECK_FLAG(nhlfe->flags, NHLFE_FLAG_SELECTED) | |
3553 | && CHECK_FLAG(nexthop->flags, | |
3554 | NEXTHOP_FLAG_ACTIVE))) | |
3555 | || (cmd == RTM_DELROUTE | |
3556 | && (CHECK_FLAG(nhlfe->flags, | |
3557 | NHLFE_FLAG_INSTALLED) | |
3558 | && CHECK_FLAG(nexthop->flags, | |
3559 | NEXTHOP_FLAG_FIB)))) { | |
3560 | /* Add the gateway */ | |
3561 | _netlink_mpls_build_singlepath( | |
3562 | routedesc, nhlfe, | |
3563 | &req.n, &req.r, | |
3564 | sizeof(req), cmd); | |
3565 | ||
3566 | nexthop_num++; | |
3567 | break; | |
3568 | } | |
3569 | } | |
3570 | } else { /* Multipath case */ | |
3571 | char buf[NL_PKT_BUF_SIZE]; | |
3572 | struct rtattr *rta = (void *)buf; | |
3573 | struct rtnexthop *rtnh; | |
81793ac1 | 3574 | const union g_addr *src1 = NULL; |
16c628de MS |
3575 | |
3576 | rta->rta_type = RTA_MULTIPATH; | |
3577 | rta->rta_len = RTA_LENGTH(0); | |
3578 | rtnh = RTA_DATA(rta); | |
3579 | ||
3580 | routedesc = "multipath"; | |
3581 | _netlink_mpls_debug(cmd, dplane_ctx_get_in_label(ctx), | |
3582 | routedesc); | |
3583 | ||
3584 | nexthop_num = 0; | |
3585 | for (nhlfe = dplane_ctx_get_nhlfe(ctx); | |
3586 | nhlfe; nhlfe = nhlfe->next) { | |
3587 | nexthop = nhlfe->nexthop; | |
3588 | if (!nexthop) | |
3589 | continue; | |
3590 | ||
16c628de MS |
3591 | if ((cmd == RTM_NEWROUTE |
3592 | && (CHECK_FLAG(nhlfe->flags, NHLFE_FLAG_SELECTED) | |
3593 | && CHECK_FLAG(nexthop->flags, | |
3594 | NEXTHOP_FLAG_ACTIVE))) | |
3595 | || (cmd == RTM_DELROUTE | |
3596 | && (CHECK_FLAG(nhlfe->flags, | |
3597 | NHLFE_FLAG_INSTALLED) | |
3598 | && CHECK_FLAG(nexthop->flags, | |
3599 | NEXTHOP_FLAG_FIB)))) { | |
3600 | nexthop_num++; | |
3601 | ||
3602 | /* Build the multipath */ | |
3603 | _netlink_mpls_build_multipath(routedesc, nhlfe, | |
3604 | rta, rtnh, &req.r, | |
3605 | &src1); | |
3606 | rtnh = RTNH_NEXT(rtnh); | |
3607 | } | |
3608 | } | |
3609 | ||
3610 | /* Add the multipath */ | |
3611 | if (rta->rta_len > RTA_LENGTH(0)) | |
3612 | addattr_l(&req.n, NL_PKT_BUF_SIZE, RTA_MULTIPATH, | |
3613 | RTA_DATA(rta), RTA_PAYLOAD(rta)); | |
3614 | } | |
3615 | ||
3616 | /* Talk to netlink socket. */ | |
3617 | return netlink_talk_info(netlink_talk_filter, &req.n, | |
3618 | dplane_ctx_get_ns(ctx), 0); | |
3619 | } | |
ddfeb486 | 3620 | #endif /* HAVE_NETLINK */ |