]>
Commit | Line | Data |
---|---|---|
718e3744 | 1 | /* Kernel routing table updates using netlink over GNU/Linux system. |
2 | * Copyright (C) 1997, 98, 99 Kunihiro Ishiguro | |
3 | * | |
4 | * This file is part of GNU Zebra. | |
5 | * | |
6 | * GNU Zebra is free software; you can redistribute it and/or modify it | |
7 | * under the terms of the GNU General Public License as published by the | |
8 | * Free Software Foundation; either version 2, or (at your option) any | |
9 | * later version. | |
10 | * | |
11 | * GNU Zebra is distributed in the hope that it will be useful, but | |
12 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | * General Public License for more details. | |
15 | * | |
896014f4 DL |
16 | * You should have received a copy of the GNU General Public License along |
17 | * with this program; see the file COPYING; if not, write to the Free Software | |
18 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
718e3744 | 19 | */ |
20 | ||
21 | #include <zebra.h> | |
ddfeb486 DL |
22 | |
23 | #ifdef HAVE_NETLINK | |
24 | ||
8ccc7e80 | 25 | #include <net/if_arp.h> |
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 | ||
7c99d51b MS |
78 | /* We capture whether the current kernel supports nexthop ids; by |
79 | * default, we'll use them if possible. There's also a configuration | |
80 | * available to _disable_ use of kernel nexthops. | |
81 | */ | |
fec211ad | 82 | static bool supports_nh; |
81505946 | 83 | |
d62a17ae | 84 | struct gw_family_t { |
d7c0a89a QY |
85 | uint16_t filler; |
86 | uint16_t family; | |
d62a17ae | 87 | union g_addr gate; |
40c7bdb0 | 88 | }; |
89 | ||
2b64873d DL |
90 | static const char ipv4_ll_buf[16] = "169.254.0.1"; |
91 | static struct in_addr ipv4_ll; | |
8755598a | 92 | |
7c99d51b MS |
93 | /* Helper to control use of kernel-level nexthop ids */ |
94 | static bool kernel_nexthops_supported(void) | |
95 | { | |
96 | return (supports_nh && zebra_nhg_kernel_nexthops_enabled()); | |
97 | } | |
98 | ||
8755598a DS |
99 | /* |
100 | * The ipv4_ll data structure is used for all 5549 | |
101 | * additions to the kernel. Let's figure out the | |
102 | * correct value one time instead for every | |
103 | * install/remove of a 5549 type route | |
104 | */ | |
d62a17ae | 105 | void rt_netlink_init(void) |
8755598a | 106 | { |
d62a17ae | 107 | inet_pton(AF_INET, ipv4_ll_buf, &ipv4_ll); |
8755598a DS |
108 | } |
109 | ||
931fa60c MS |
110 | /* |
111 | * Mapping from dataplane neighbor flags to netlink flags | |
112 | */ | |
113 | static uint8_t neigh_flags_to_netlink(uint8_t dplane_flags) | |
114 | { | |
115 | uint8_t flags = 0; | |
116 | ||
117 | if (dplane_flags & DPLANE_NTF_EXT_LEARNED) | |
118 | flags |= NTF_EXT_LEARNED; | |
119 | if (dplane_flags & DPLANE_NTF_ROUTER) | |
120 | flags |= NTF_ROUTER; | |
121 | ||
122 | return flags; | |
123 | } | |
124 | ||
125 | /* | |
126 | * Mapping from dataplane neighbor state to netlink state | |
127 | */ | |
128 | static uint16_t neigh_state_to_netlink(uint16_t dplane_state) | |
129 | { | |
130 | uint16_t state = 0; | |
131 | ||
132 | if (dplane_state & DPLANE_NUD_REACHABLE) | |
133 | state |= NUD_REACHABLE; | |
134 | if (dplane_state & DPLANE_NUD_STALE) | |
135 | state |= NUD_STALE; | |
136 | if (dplane_state & DPLANE_NUD_NOARP) | |
137 | state |= NUD_NOARP; | |
138 | if (dplane_state & DPLANE_NUD_PROBE) | |
139 | state |= NUD_PROBE; | |
140 | ||
141 | return state; | |
142 | } | |
143 | ||
144 | ||
23b1f334 DD |
145 | static inline int is_selfroute(int proto) |
146 | { | |
d62a17ae | 147 | if ((proto == RTPROT_BGP) || (proto == RTPROT_OSPF) |
d4d71f11 | 148 | || (proto == RTPROT_ZSTATIC) || (proto == RTPROT_ZEBRA) |
d62a17ae | 149 | || (proto == RTPROT_ISIS) || (proto == RTPROT_RIPNG) |
150 | || (proto == RTPROT_NHRP) || (proto == RTPROT_EIGRP) | |
915902cb | 151 | || (proto == RTPROT_LDP) || (proto == RTPROT_BABEL) |
0761368a | 152 | || (proto == RTPROT_RIP) || (proto == RTPROT_SHARP) |
da82f6b4 | 153 | || (proto == RTPROT_PBR) || (proto == RTPROT_OPENFABRIC)) { |
d62a17ae | 154 | return 1; |
155 | } | |
156 | ||
157 | return 0; | |
23b1f334 DD |
158 | } |
159 | ||
915902cb | 160 | static inline int zebra2proto(int proto) |
23b1f334 | 161 | { |
d62a17ae | 162 | switch (proto) { |
163 | case ZEBRA_ROUTE_BABEL: | |
164 | proto = RTPROT_BABEL; | |
165 | break; | |
166 | case ZEBRA_ROUTE_BGP: | |
167 | proto = RTPROT_BGP; | |
168 | break; | |
169 | case ZEBRA_ROUTE_OSPF: | |
170 | case ZEBRA_ROUTE_OSPF6: | |
171 | proto = RTPROT_OSPF; | |
172 | break; | |
173 | case ZEBRA_ROUTE_STATIC: | |
d4d71f11 | 174 | proto = RTPROT_ZSTATIC; |
d62a17ae | 175 | break; |
176 | case ZEBRA_ROUTE_ISIS: | |
177 | proto = RTPROT_ISIS; | |
178 | break; | |
179 | case ZEBRA_ROUTE_RIP: | |
180 | proto = RTPROT_RIP; | |
181 | break; | |
182 | case ZEBRA_ROUTE_RIPNG: | |
183 | proto = RTPROT_RIPNG; | |
184 | break; | |
185 | case ZEBRA_ROUTE_NHRP: | |
186 | proto = RTPROT_NHRP; | |
187 | break; | |
188 | case ZEBRA_ROUTE_EIGRP: | |
189 | proto = RTPROT_EIGRP; | |
190 | break; | |
191 | case ZEBRA_ROUTE_LDP: | |
192 | proto = RTPROT_LDP; | |
193 | break; | |
8a71d93d DS |
194 | case ZEBRA_ROUTE_SHARP: |
195 | proto = RTPROT_SHARP; | |
196 | break; | |
0761368a DS |
197 | case ZEBRA_ROUTE_PBR: |
198 | proto = RTPROT_PBR; | |
199 | break; | |
da82f6b4 CF |
200 | case ZEBRA_ROUTE_OPENFABRIC: |
201 | proto = RTPROT_OPENFABRIC; | |
202 | break; | |
a56ec5c0 | 203 | case ZEBRA_ROUTE_TABLE: |
38e40db1 | 204 | case ZEBRA_ROUTE_NHG: |
a56ec5c0 DS |
205 | proto = RTPROT_ZEBRA; |
206 | break; | |
d62a17ae | 207 | default: |
0761368a DS |
208 | /* |
209 | * When a user adds a new protocol this will show up | |
210 | * to let them know to do something about it. This | |
211 | * is intentionally a warn because we should see | |
212 | * this as part of development of a new protocol | |
213 | */ | |
9df414fe QY |
214 | zlog_debug( |
215 | "%s: Please add this protocol(%d) to proper rt_netlink.c handling", | |
216 | __PRETTY_FUNCTION__, proto); | |
d62a17ae | 217 | proto = RTPROT_ZEBRA; |
218 | break; | |
219 | } | |
220 | ||
221 | return proto; | |
23b1f334 DD |
222 | } |
223 | ||
38e40db1 | 224 | static inline int proto2zebra(int proto, int family, bool is_nexthop) |
915902cb DS |
225 | { |
226 | switch (proto) { | |
227 | case RTPROT_BABEL: | |
228 | proto = ZEBRA_ROUTE_BABEL; | |
229 | break; | |
230 | case RTPROT_BGP: | |
231 | proto = ZEBRA_ROUTE_BGP; | |
232 | break; | |
233 | case RTPROT_OSPF: | |
996c9314 LB |
234 | proto = (family == AFI_IP) ? ZEBRA_ROUTE_OSPF |
235 | : ZEBRA_ROUTE_OSPF6; | |
915902cb DS |
236 | break; |
237 | case RTPROT_ISIS: | |
238 | proto = ZEBRA_ROUTE_ISIS; | |
239 | break; | |
240 | case RTPROT_RIP: | |
241 | proto = ZEBRA_ROUTE_RIP; | |
242 | break; | |
243 | case RTPROT_RIPNG: | |
244 | proto = ZEBRA_ROUTE_RIPNG; | |
245 | break; | |
246 | case RTPROT_NHRP: | |
247 | proto = ZEBRA_ROUTE_NHRP; | |
248 | break; | |
249 | case RTPROT_EIGRP: | |
250 | proto = ZEBRA_ROUTE_EIGRP; | |
251 | break; | |
252 | case RTPROT_LDP: | |
253 | proto = ZEBRA_ROUTE_LDP; | |
254 | break; | |
255 | case RTPROT_STATIC: | |
d4d71f11 | 256 | case RTPROT_ZSTATIC: |
915902cb DS |
257 | proto = ZEBRA_ROUTE_STATIC; |
258 | break; | |
0761368a DS |
259 | case RTPROT_SHARP: |
260 | proto = ZEBRA_ROUTE_SHARP; | |
261 | break; | |
262 | case RTPROT_PBR: | |
263 | proto = ZEBRA_ROUTE_PBR; | |
264 | break; | |
da82f6b4 CF |
265 | case RTPROT_OPENFABRIC: |
266 | proto = ZEBRA_ROUTE_OPENFABRIC; | |
267 | break; | |
38e40db1 SW |
268 | case RTPROT_ZEBRA: |
269 | if (is_nexthop) { | |
270 | proto = ZEBRA_ROUTE_NHG; | |
271 | break; | |
272 | } | |
273 | /* Intentional fall thru */ | |
915902cb | 274 | default: |
0761368a DS |
275 | /* |
276 | * When a user adds a new protocol this will show up | |
277 | * to let them know to do something about it. This | |
278 | * is intentionally a warn because we should see | |
279 | * this as part of development of a new protocol | |
280 | */ | |
9df414fe QY |
281 | zlog_debug( |
282 | "%s: Please add this protocol(%d) to proper rt_netlink.c handling", | |
283 | __PRETTY_FUNCTION__, proto); | |
915902cb DS |
284 | proto = ZEBRA_ROUTE_KERNEL; |
285 | break; | |
286 | } | |
287 | return proto; | |
288 | } | |
289 | ||
12f6fb97 DS |
290 | /* |
291 | Pending: create an efficient table_id (in a tree/hash) based lookup) | |
292 | */ | |
d7c0a89a | 293 | static vrf_id_t vrf_lookup_by_table(uint32_t table_id, ns_id_t ns_id) |
12f6fb97 | 294 | { |
d62a17ae | 295 | struct vrf *vrf; |
296 | struct zebra_vrf *zvrf; | |
12f6fb97 | 297 | |
a2addae8 | 298 | RB_FOREACH (vrf, vrf_id_head, &vrfs_by_id) { |
78dd30b2 PG |
299 | zvrf = vrf->info; |
300 | if (zvrf == NULL) | |
d62a17ae | 301 | continue; |
78dd30b2 PG |
302 | /* case vrf with netns : match the netnsid */ |
303 | if (vrf_is_backend_netns()) { | |
304 | if (ns_id == zvrf_id(zvrf)) | |
305 | return zvrf_id(zvrf); | |
306 | } else { | |
307 | /* VRF is VRF_BACKEND_VRF_LITE */ | |
308 | if (zvrf->table_id != table_id) | |
309 | continue; | |
310 | return zvrf_id(zvrf); | |
311 | } | |
d62a17ae | 312 | } |
12f6fb97 | 313 | |
d62a17ae | 314 | return VRF_DEFAULT; |
12f6fb97 DS |
315 | } |
316 | ||
87da6a60 SW |
317 | /** |
318 | * @parse_encap_mpls() - Parses encapsulated mpls attributes | |
319 | * @tb: Pointer to rtattr to look for nested items in. | |
320 | * @labels: Pointer to store labels in. | |
321 | * | |
322 | * Return: Number of mpls labels found. | |
323 | */ | |
324 | static int parse_encap_mpls(struct rtattr *tb, mpls_label_t *labels) | |
325 | { | |
326 | struct rtattr *tb_encap[MPLS_IPTUNNEL_MAX + 1] = {0}; | |
327 | mpls_lse_t *lses = NULL; | |
328 | int num_labels = 0; | |
329 | uint32_t ttl = 0; | |
330 | uint32_t bos = 0; | |
331 | uint32_t exp = 0; | |
332 | mpls_label_t label = 0; | |
333 | ||
334 | netlink_parse_rtattr_nested(tb_encap, MPLS_IPTUNNEL_MAX, tb); | |
335 | lses = (mpls_lse_t *)RTA_DATA(tb_encap[MPLS_IPTUNNEL_DST]); | |
336 | while (!bos && num_labels < MPLS_MAX_LABELS) { | |
337 | mpls_lse_decode(lses[num_labels], &label, &ttl, &exp, &bos); | |
338 | labels[num_labels++] = label; | |
339 | } | |
340 | ||
341 | return num_labels; | |
342 | } | |
343 | ||
77a44d94 SW |
344 | static struct nexthop |
345 | parse_nexthop_unicast(ns_id_t ns_id, struct rtmsg *rtm, struct rtattr **tb, | |
346 | enum blackhole_type bh_type, int index, void *prefsrc, | |
20822f9d | 347 | void *gate, afi_t afi, vrf_id_t vrf_id) |
77a44d94 SW |
348 | { |
349 | struct interface *ifp = NULL; | |
350 | struct nexthop nh = {0}; | |
351 | mpls_label_t labels[MPLS_MAX_LABELS] = {0}; | |
352 | int num_labels = 0; | |
353 | ||
20822f9d | 354 | vrf_id_t nh_vrf_id = vrf_id; |
77a44d94 SW |
355 | size_t sz = (afi == AFI_IP) ? 4 : 16; |
356 | ||
357 | if (bh_type == BLACKHOLE_UNSPEC) { | |
358 | if (index && !gate) | |
359 | nh.type = NEXTHOP_TYPE_IFINDEX; | |
360 | else if (index && gate) | |
361 | nh.type = (afi == AFI_IP) ? NEXTHOP_TYPE_IPV4_IFINDEX | |
362 | : NEXTHOP_TYPE_IPV6_IFINDEX; | |
363 | else if (!index && gate) | |
364 | nh.type = (afi == AFI_IP) ? NEXTHOP_TYPE_IPV4 | |
365 | : NEXTHOP_TYPE_IPV6; | |
366 | else { | |
367 | nh.type = NEXTHOP_TYPE_BLACKHOLE; | |
368 | nh.bh_type = bh_type; | |
369 | } | |
370 | } else { | |
371 | nh.type = NEXTHOP_TYPE_BLACKHOLE; | |
372 | nh.bh_type = bh_type; | |
373 | } | |
374 | nh.ifindex = index; | |
375 | if (prefsrc) | |
376 | memcpy(&nh.src, prefsrc, sz); | |
377 | if (gate) | |
378 | memcpy(&nh.gate, gate, sz); | |
379 | ||
380 | if (index) { | |
381 | ifp = if_lookup_by_index_per_ns(zebra_ns_lookup(ns_id), index); | |
382 | if (ifp) | |
383 | nh_vrf_id = ifp->vrf_id; | |
384 | } | |
385 | nh.vrf_id = nh_vrf_id; | |
386 | ||
387 | if (tb[RTA_ENCAP] && tb[RTA_ENCAP_TYPE] | |
388 | && *(uint16_t *)RTA_DATA(tb[RTA_ENCAP_TYPE]) | |
389 | == LWTUNNEL_ENCAP_MPLS) { | |
390 | num_labels = parse_encap_mpls(tb[RTA_ENCAP], labels); | |
391 | } | |
392 | ||
393 | if (rtm->rtm_flags & RTNH_F_ONLINK) | |
394 | SET_FLAG(nh.flags, NEXTHOP_FLAG_ONLINK); | |
395 | ||
396 | if (num_labels) | |
397 | nexthop_add_labels(&nh, ZEBRA_LSP_STATIC, num_labels, labels); | |
398 | ||
399 | return nh; | |
400 | } | |
401 | ||
20822f9d | 402 | static uint8_t parse_multipath_nexthops_unicast(ns_id_t ns_id, |
0eb97b86 | 403 | struct nexthop_group *ng, |
20822f9d SW |
404 | struct rtmsg *rtm, |
405 | struct rtnexthop *rtnh, | |
406 | struct rtattr **tb, | |
407 | void *prefsrc, vrf_id_t vrf_id) | |
408 | { | |
409 | void *gate = NULL; | |
410 | struct interface *ifp = NULL; | |
411 | int index = 0; | |
412 | /* MPLS labels */ | |
413 | mpls_label_t labels[MPLS_MAX_LABELS] = {0}; | |
414 | int num_labels = 0; | |
415 | struct rtattr *rtnh_tb[RTA_MAX + 1] = {}; | |
416 | ||
417 | int len = RTA_PAYLOAD(tb[RTA_MULTIPATH]); | |
418 | vrf_id_t nh_vrf_id = vrf_id; | |
419 | ||
20822f9d SW |
420 | for (;;) { |
421 | struct nexthop *nh = NULL; | |
422 | ||
423 | if (len < (int)sizeof(*rtnh) || rtnh->rtnh_len > len) | |
424 | break; | |
425 | ||
426 | index = rtnh->rtnh_ifindex; | |
427 | if (index) { | |
428 | /* | |
429 | * Yes we are looking this up | |
430 | * for every nexthop and just | |
431 | * using the last one looked | |
432 | * up right now | |
433 | */ | |
434 | ifp = if_lookup_by_index_per_ns(zebra_ns_lookup(ns_id), | |
435 | index); | |
436 | if (ifp) | |
437 | nh_vrf_id = ifp->vrf_id; | |
438 | else { | |
439 | flog_warn( | |
440 | EC_ZEBRA_UNKNOWN_INTERFACE, | |
441 | "%s: Unknown interface %u specified, defaulting to VRF_DEFAULT", | |
442 | __PRETTY_FUNCTION__, index); | |
443 | nh_vrf_id = VRF_DEFAULT; | |
444 | } | |
445 | } else | |
446 | nh_vrf_id = vrf_id; | |
447 | ||
448 | if (rtnh->rtnh_len > sizeof(*rtnh)) { | |
449 | memset(rtnh_tb, 0, sizeof(rtnh_tb)); | |
450 | ||
451 | netlink_parse_rtattr(rtnh_tb, RTA_MAX, RTNH_DATA(rtnh), | |
452 | rtnh->rtnh_len - sizeof(*rtnh)); | |
453 | if (rtnh_tb[RTA_GATEWAY]) | |
454 | gate = RTA_DATA(rtnh_tb[RTA_GATEWAY]); | |
455 | if (rtnh_tb[RTA_ENCAP] && rtnh_tb[RTA_ENCAP_TYPE] | |
456 | && *(uint16_t *)RTA_DATA(rtnh_tb[RTA_ENCAP_TYPE]) | |
457 | == LWTUNNEL_ENCAP_MPLS) { | |
458 | num_labels = parse_encap_mpls( | |
459 | rtnh_tb[RTA_ENCAP], labels); | |
460 | } | |
461 | } | |
462 | ||
f3354e16 SW |
463 | if (gate && rtm->rtm_family == AF_INET) { |
464 | if (index) | |
0eb97b86 MS |
465 | nh = nexthop_from_ipv4_ifindex( |
466 | gate, prefsrc, index, nh_vrf_id); | |
f3354e16 | 467 | else |
0eb97b86 MS |
468 | nh = nexthop_from_ipv4(gate, prefsrc, |
469 | nh_vrf_id); | |
f3354e16 SW |
470 | } else if (gate && rtm->rtm_family == AF_INET6) { |
471 | if (index) | |
0eb97b86 MS |
472 | nh = nexthop_from_ipv6_ifindex( |
473 | gate, index, nh_vrf_id); | |
f3354e16 | 474 | else |
0eb97b86 | 475 | nh = nexthop_from_ipv6(gate, nh_vrf_id); |
20822f9d | 476 | } else |
0eb97b86 | 477 | nh = nexthop_from_ifindex(index, nh_vrf_id); |
20822f9d SW |
478 | |
479 | if (nh) { | |
df7fb580 DS |
480 | nh->weight = rtnh->rtnh_hops + 1; |
481 | ||
20822f9d SW |
482 | if (num_labels) |
483 | nexthop_add_labels(nh, ZEBRA_LSP_STATIC, | |
484 | num_labels, labels); | |
485 | ||
486 | if (rtnh->rtnh_flags & RTNH_F_ONLINK) | |
487 | SET_FLAG(nh->flags, NEXTHOP_FLAG_ONLINK); | |
0eb97b86 MS |
488 | |
489 | /* Add to temporary list */ | |
490 | nexthop_group_add_sorted(ng, nh); | |
20822f9d SW |
491 | } |
492 | ||
493 | if (rtnh->rtnh_len == 0) | |
494 | break; | |
495 | ||
496 | len -= NLMSG_ALIGN(rtnh->rtnh_len); | |
497 | rtnh = RTNH_NEXT(rtnh); | |
498 | } | |
499 | ||
0eb97b86 | 500 | uint8_t nhop_num = nexthop_group_nexthop_num(ng); |
20822f9d SW |
501 | |
502 | return nhop_num; | |
503 | } | |
504 | ||
718e3744 | 505 | /* Looking up routing table by netlink interface. */ |
2414abd3 | 506 | static int netlink_route_change_read_unicast(struct nlmsghdr *h, ns_id_t ns_id, |
d62a17ae | 507 | int startup) |
718e3744 | 508 | { |
d62a17ae | 509 | int len; |
510 | struct rtmsg *rtm; | |
511 | struct rtattr *tb[RTA_MAX + 1]; | |
d7c0a89a | 512 | uint8_t flags = 0; |
d62a17ae | 513 | struct prefix p; |
792fa92e | 514 | struct prefix_ipv6 src_p = {}; |
78dd30b2 | 515 | vrf_id_t vrf_id; |
d62a17ae | 516 | |
517 | char anyaddr[16] = {0}; | |
518 | ||
915902cb | 519 | int proto = ZEBRA_ROUTE_KERNEL; |
d62a17ae | 520 | int index = 0; |
521 | int table; | |
522 | int metric = 0; | |
d7c0a89a | 523 | uint32_t mtu = 0; |
25715c7e | 524 | uint8_t distance = 0; |
4e40b6d6 | 525 | route_tag_t tag = 0; |
fcc89a9c | 526 | uint32_t nhe_id = 0; |
d62a17ae | 527 | |
528 | void *dest = NULL; | |
529 | void *gate = NULL; | |
530 | void *prefsrc = NULL; /* IPv4 preferred source host address */ | |
531 | void *src = NULL; /* IPv6 srcdest source prefix */ | |
e655a03c | 532 | enum blackhole_type bh_type = BLACKHOLE_UNSPEC; |
d62a17ae | 533 | |
534 | rtm = NLMSG_DATA(h); | |
535 | ||
536 | if (startup && h->nlmsg_type != RTM_NEWROUTE) | |
537 | return 0; | |
e655a03c DL |
538 | switch (rtm->rtm_type) { |
539 | case RTN_UNICAST: | |
540 | break; | |
541 | case RTN_BLACKHOLE: | |
542 | bh_type = BLACKHOLE_NULL; | |
543 | break; | |
544 | case RTN_UNREACHABLE: | |
545 | bh_type = BLACKHOLE_REJECT; | |
546 | break; | |
547 | case RTN_PROHIBIT: | |
548 | bh_type = BLACKHOLE_ADMINPROHIB; | |
549 | break; | |
550 | default: | |
8c8f250b DS |
551 | if (IS_ZEBRA_DEBUG_KERNEL) |
552 | zlog_debug("Route rtm_type: %s(%d) intentionally ignoring", | |
553 | nl_rttype_to_str(rtm->rtm_type), | |
554 | rtm->rtm_type); | |
d62a17ae | 555 | return 0; |
e655a03c | 556 | } |
d62a17ae | 557 | |
558 | len = h->nlmsg_len - NLMSG_LENGTH(sizeof(struct rtmsg)); | |
9bdf8618 DS |
559 | if (len < 0) { |
560 | zlog_err("%s: Message received from netlink is of a broken size %d %zu", | |
561 | __PRETTY_FUNCTION__, h->nlmsg_len, | |
562 | (size_t)NLMSG_LENGTH(sizeof(struct rtmsg))); | |
d62a17ae | 563 | return -1; |
9bdf8618 | 564 | } |
d62a17ae | 565 | |
566 | memset(tb, 0, sizeof tb); | |
567 | netlink_parse_rtattr(tb, RTA_MAX, RTM_RTA(rtm), len); | |
568 | ||
569 | if (rtm->rtm_flags & RTM_F_CLONED) | |
570 | return 0; | |
571 | if (rtm->rtm_protocol == RTPROT_REDIRECT) | |
572 | return 0; | |
573 | if (rtm->rtm_protocol == RTPROT_KERNEL) | |
574 | return 0; | |
575 | ||
576 | if (!startup && is_selfroute(rtm->rtm_protocol) | |
6ab5222f DS |
577 | && h->nlmsg_type == RTM_NEWROUTE) { |
578 | if (IS_ZEBRA_DEBUG_KERNEL) | |
579 | zlog_debug("Route type: %d Received that we think we have originated, ignoring", | |
580 | rtm->rtm_protocol); | |
d62a17ae | 581 | return 0; |
6ab5222f | 582 | } |
d62a17ae | 583 | |
584 | /* We don't care about change notifications for the MPLS table. */ | |
585 | /* TODO: Revisit this. */ | |
586 | if (rtm->rtm_family == AF_MPLS) | |
587 | return 0; | |
588 | ||
589 | /* Table corresponding to route. */ | |
590 | if (tb[RTA_TABLE]) | |
591 | table = *(int *)RTA_DATA(tb[RTA_TABLE]); | |
592 | else | |
593 | table = rtm->rtm_table; | |
594 | ||
595 | /* Map to VRF */ | |
78dd30b2 | 596 | vrf_id = vrf_lookup_by_table(table, ns_id); |
d62a17ae | 597 | if (vrf_id == VRF_DEFAULT) { |
598 | if (!is_zebra_valid_kernel_table(table) | |
599 | && !is_zebra_main_routing_table(table)) | |
600 | return 0; | |
601 | } | |
602 | ||
603 | /* Route which inserted by Zebra. */ | |
915902cb | 604 | if (is_selfroute(rtm->rtm_protocol)) { |
d62a17ae | 605 | flags |= ZEBRA_FLAG_SELFROUTE; |
38e40db1 | 606 | proto = proto2zebra(rtm->rtm_protocol, rtm->rtm_family, false); |
915902cb | 607 | } |
d62a17ae | 608 | if (tb[RTA_OIF]) |
609 | index = *(int *)RTA_DATA(tb[RTA_OIF]); | |
610 | ||
611 | if (tb[RTA_DST]) | |
612 | dest = RTA_DATA(tb[RTA_DST]); | |
613 | else | |
614 | dest = anyaddr; | |
615 | ||
616 | if (tb[RTA_SRC]) | |
617 | src = RTA_DATA(tb[RTA_SRC]); | |
618 | else | |
619 | src = anyaddr; | |
620 | ||
621 | if (tb[RTA_PREFSRC]) | |
622 | prefsrc = RTA_DATA(tb[RTA_PREFSRC]); | |
623 | ||
624 | if (tb[RTA_GATEWAY]) | |
625 | gate = RTA_DATA(tb[RTA_GATEWAY]); | |
626 | ||
fcc89a9c SW |
627 | if (tb[RTA_NH_ID]) |
628 | nhe_id = *(uint32_t *)RTA_DATA(tb[RTA_NH_ID]); | |
629 | ||
f19435a8 DS |
630 | if (tb[RTA_PRIORITY]) |
631 | metric = *(int *)RTA_DATA(tb[RTA_PRIORITY]); | |
d62a17ae | 632 | |
4e40b6d6 KK |
633 | #if defined(SUPPORT_REALMS) |
634 | if (tb[RTA_FLOW]) | |
635 | tag = *(uint32_t *)RTA_DATA(tb[RTA_FLOW]); | |
636 | #endif | |
637 | ||
f19435a8 DS |
638 | if (tb[RTA_METRICS]) { |
639 | struct rtattr *mxrta[RTAX_MAX + 1]; | |
d62a17ae | 640 | |
f19435a8 | 641 | memset(mxrta, 0, sizeof mxrta); |
996c9314 | 642 | netlink_parse_rtattr(mxrta, RTAX_MAX, RTA_DATA(tb[RTA_METRICS]), |
f19435a8 | 643 | RTA_PAYLOAD(tb[RTA_METRICS])); |
d62a17ae | 644 | |
f19435a8 | 645 | if (mxrta[RTAX_MTU]) |
d7c0a89a | 646 | mtu = *(uint32_t *)RTA_DATA(mxrta[RTAX_MTU]); |
d62a17ae | 647 | } |
648 | ||
649 | if (rtm->rtm_family == AF_INET) { | |
650 | p.family = AF_INET; | |
930571d2 | 651 | if (rtm->rtm_dst_len > IPV4_MAX_BITLEN) { |
e17d9b2d | 652 | zlog_err( |
75829703 | 653 | "Invalid destination prefix length: %u received from kernel route change", |
930571d2 | 654 | rtm->rtm_dst_len); |
e17d9b2d | 655 | return -1; |
930571d2 | 656 | } |
d62a17ae | 657 | memcpy(&p.u.prefix4, dest, 4); |
658 | p.prefixlen = rtm->rtm_dst_len; | |
659 | ||
1f610a1f CF |
660 | if (rtm->rtm_src_len != 0) { |
661 | char buf[PREFIX_STRLEN]; | |
9df414fe | 662 | flog_warn( |
e914ccbe | 663 | EC_ZEBRA_UNSUPPORTED_V4_SRCDEST, |
9df414fe QY |
664 | "unsupported IPv4 sourcedest route (dest %s vrf %u)", |
665 | prefix2str(&p, buf, sizeof(buf)), vrf_id); | |
1f610a1f CF |
666 | return 0; |
667 | } | |
930571d2 | 668 | |
1f610a1f CF |
669 | /* Force debug below to not display anything for source */ |
670 | src_p.prefixlen = 0; | |
d62a17ae | 671 | } else if (rtm->rtm_family == AF_INET6) { |
672 | p.family = AF_INET6; | |
930571d2 | 673 | if (rtm->rtm_dst_len > IPV6_MAX_BITLEN) { |
e17d9b2d | 674 | zlog_err( |
75829703 | 675 | "Invalid destination prefix length: %u received from kernel route change", |
930571d2 | 676 | rtm->rtm_dst_len); |
e17d9b2d | 677 | return -1; |
930571d2 | 678 | } |
d62a17ae | 679 | memcpy(&p.u.prefix6, dest, 16); |
680 | p.prefixlen = rtm->rtm_dst_len; | |
681 | ||
682 | src_p.family = AF_INET6; | |
930571d2 | 683 | if (rtm->rtm_src_len > IPV6_MAX_BITLEN) { |
e17d9b2d | 684 | zlog_err( |
75829703 | 685 | "Invalid source prefix length: %u received from kernel route change", |
930571d2 | 686 | rtm->rtm_src_len); |
e17d9b2d | 687 | return -1; |
930571d2 | 688 | } |
d62a17ae | 689 | memcpy(&src_p.prefix, src, 16); |
690 | src_p.prefixlen = rtm->rtm_src_len; | |
691 | } | |
692 | ||
25715c7e DS |
693 | /* |
694 | * For ZEBRA_ROUTE_KERNEL types: | |
695 | * | |
696 | * The metric/priority of the route received from the kernel | |
697 | * is a 32 bit number. We are going to interpret the high | |
698 | * order byte as the Admin Distance and the low order 3 bytes | |
699 | * as the metric. | |
700 | * | |
701 | * This will allow us to do two things: | |
702 | * 1) Allow the creation of kernel routes that can be | |
703 | * overridden by zebra. | |
704 | * 2) Allow the old behavior for 'most' kernel route types | |
705 | * if a user enters 'ip route ...' v4 routes get a metric | |
706 | * of 0 and v6 routes get a metric of 1024. Both of these | |
707 | * values will end up with a admin distance of 0, which | |
708 | * will cause them to win for the purposes of zebra. | |
709 | */ | |
710 | if (proto == ZEBRA_ROUTE_KERNEL) { | |
711 | distance = (metric >> 24) & 0xFF; | |
996c9314 | 712 | metric = (metric & 0x00FFFFFF); |
25715c7e DS |
713 | } |
714 | ||
d62a17ae | 715 | if (IS_ZEBRA_DEBUG_KERNEL) { |
716 | char buf[PREFIX_STRLEN]; | |
717 | char buf2[PREFIX_STRLEN]; | |
45df4e96 | 718 | zlog_debug("%s %s%s%s vrf %u(%u) metric: %d Admin Distance: %d", |
996c9314 LB |
719 | nl_msg_type_to_str(h->nlmsg_type), |
720 | prefix2str(&p, buf, sizeof(buf)), | |
721 | src_p.prefixlen ? " from " : "", | |
722 | src_p.prefixlen | |
723 | ? prefix2str(&src_p, buf2, sizeof(buf2)) | |
724 | : "", | |
45df4e96 | 725 | vrf_id, table, metric, distance); |
d62a17ae | 726 | } |
727 | ||
728 | afi_t afi = AFI_IP; | |
729 | if (rtm->rtm_family == AF_INET6) | |
730 | afi = AFI_IP6; | |
731 | ||
732 | if (h->nlmsg_type == RTM_NEWROUTE) { | |
8795f904 | 733 | |
fd36be7e | 734 | if (!tb[RTA_MULTIPATH]) { |
77a44d94 | 735 | struct nexthop nh = {0}; |
8795f904 | 736 | |
77a44d94 SW |
737 | if (!nhe_id) { |
738 | nh = parse_nexthop_unicast( | |
739 | ns_id, rtm, tb, bh_type, index, prefsrc, | |
20822f9d | 740 | gate, afi, vrf_id); |
87da6a60 | 741 | } |
4a7371e9 | 742 | rib_add(afi, SAFI_UNICAST, vrf_id, proto, 0, flags, &p, |
8032b717 SW |
743 | &src_p, &nh, nhe_id, table, metric, mtu, |
744 | distance, tag); | |
fd36be7e | 745 | } else { |
d62a17ae | 746 | /* This is a multipath route */ |
d62a17ae | 747 | struct route_entry *re; |
0eb97b86 | 748 | struct nexthop_group *ng = NULL; |
d62a17ae | 749 | struct rtnexthop *rtnh = |
750 | (struct rtnexthop *)RTA_DATA(tb[RTA_MULTIPATH]); | |
d62a17ae | 751 | |
752 | re = XCALLOC(MTYPE_RE, sizeof(struct route_entry)); | |
915902cb | 753 | re->type = proto; |
25715c7e | 754 | re->distance = distance; |
d62a17ae | 755 | re->flags = flags; |
756 | re->metric = metric; | |
757 | re->mtu = mtu; | |
758 | re->vrf_id = vrf_id; | |
759 | re->table = table; | |
98572489 | 760 | re->uptime = monotime(NULL); |
4e40b6d6 | 761 | re->tag = tag; |
bbb322f2 | 762 | re->nhe_id = nhe_id; |
3c04071d | 763 | |
20822f9d | 764 | if (!nhe_id) { |
0eb97b86 MS |
765 | uint8_t nhop_num; |
766 | ||
767 | /* Use temporary list of nexthops; parse | |
768 | * message payload's nexthops. | |
769 | */ | |
770 | ng = nexthop_group_new(); | |
771 | nhop_num = | |
20822f9d | 772 | parse_multipath_nexthops_unicast( |
0eb97b86 | 773 | ns_id, ng, rtm, rtnh, tb, |
20822f9d SW |
774 | prefsrc, vrf_id); |
775 | ||
776 | zserv_nexthop_num_warn( | |
777 | __func__, (const struct prefix *)&p, | |
778 | nhop_num); | |
0eb97b86 MS |
779 | |
780 | if (nhop_num == 0) { | |
781 | nexthop_group_delete(&ng); | |
782 | ng = NULL; | |
783 | } | |
d62a17ae | 784 | } |
785 | ||
0eb97b86 | 786 | if (nhe_id || ng) |
1f610a1f | 787 | rib_add_multipath(afi, SAFI_UNICAST, &p, |
0eb97b86 | 788 | &src_p, re, ng); |
20822f9d SW |
789 | else |
790 | XFREE(MTYPE_RE, re); | |
d62a17ae | 791 | } |
792 | } else { | |
bc541126 SW |
793 | if (nhe_id) { |
794 | rib_delete(afi, SAFI_UNICAST, vrf_id, proto, 0, flags, | |
795 | &p, &src_p, NULL, nhe_id, table, metric, | |
796 | distance, true); | |
797 | } else { | |
798 | if (!tb[RTA_MULTIPATH]) { | |
799 | struct nexthop nh; | |
760f39dc HS |
800 | |
801 | nh = parse_nexthop_unicast( | |
802 | ns_id, rtm, tb, bh_type, index, prefsrc, | |
803 | gate, afi, vrf_id); | |
bc541126 SW |
804 | rib_delete(afi, SAFI_UNICAST, vrf_id, proto, 0, |
805 | flags, &p, &src_p, &nh, 0, table, | |
806 | metric, distance, true); | |
8ba5bd58 | 807 | } else { |
bc541126 SW |
808 | /* XXX: need to compare the entire list of |
809 | * nexthops here for NLM_F_APPEND stupidity */ | |
810 | rib_delete(afi, SAFI_UNICAST, vrf_id, proto, 0, | |
811 | flags, &p, &src_p, NULL, 0, table, | |
812 | metric, distance, true); | |
8ba5bd58 | 813 | } |
d62a17ae | 814 | } |
815 | } | |
816 | ||
817 | return 0; | |
718e3744 | 818 | } |
819 | ||
e3be0432 DS |
820 | static struct mcast_route_data *mroute = NULL; |
821 | ||
2414abd3 | 822 | static int netlink_route_change_read_multicast(struct nlmsghdr *h, |
d62a17ae | 823 | ns_id_t ns_id, int startup) |
565fdc75 | 824 | { |
d62a17ae | 825 | int len; |
826 | struct rtmsg *rtm; | |
827 | struct rtattr *tb[RTA_MAX + 1]; | |
828 | struct mcast_route_data *m; | |
829 | struct mcast_route_data mr; | |
830 | int iif = 0; | |
831 | int count; | |
832 | int oif[256]; | |
833 | int oif_count = 0; | |
834 | char sbuf[40]; | |
835 | char gbuf[40]; | |
836 | char oif_list[256] = "\0"; | |
78dd30b2 | 837 | vrf_id_t vrf; |
43b5cc5e | 838 | int table; |
d62a17ae | 839 | |
840 | if (mroute) | |
841 | m = mroute; | |
842 | else { | |
843 | memset(&mr, 0, sizeof(mr)); | |
844 | m = &mr; | |
845 | } | |
846 | ||
847 | rtm = NLMSG_DATA(h); | |
848 | ||
849 | len = h->nlmsg_len - NLMSG_LENGTH(sizeof(struct rtmsg)); | |
850 | ||
851 | memset(tb, 0, sizeof tb); | |
852 | netlink_parse_rtattr(tb, RTA_MAX, RTM_RTA(rtm), len); | |
90d82769 | 853 | |
43b5cc5e DS |
854 | if (tb[RTA_TABLE]) |
855 | table = *(int *)RTA_DATA(tb[RTA_TABLE]); | |
856 | else | |
857 | table = rtm->rtm_table; | |
858 | ||
78dd30b2 | 859 | vrf = vrf_lookup_by_table(table, ns_id); |
43b5cc5e | 860 | |
d62a17ae | 861 | if (tb[RTA_IIF]) |
862 | iif = *(int *)RTA_DATA(tb[RTA_IIF]); | |
863 | ||
864 | if (tb[RTA_SRC]) | |
bd8b9272 | 865 | m->sg.src = *(struct in_addr *)RTA_DATA(tb[RTA_SRC]); |
d62a17ae | 866 | |
867 | if (tb[RTA_DST]) | |
bd8b9272 | 868 | m->sg.grp = *(struct in_addr *)RTA_DATA(tb[RTA_DST]); |
d62a17ae | 869 | |
62819462 | 870 | if (tb[RTA_EXPIRES]) |
d62a17ae | 871 | m->lastused = *(unsigned long long *)RTA_DATA(tb[RTA_EXPIRES]); |
872 | ||
873 | if (tb[RTA_MULTIPATH]) { | |
874 | struct rtnexthop *rtnh = | |
875 | (struct rtnexthop *)RTA_DATA(tb[RTA_MULTIPATH]); | |
876 | ||
877 | len = RTA_PAYLOAD(tb[RTA_MULTIPATH]); | |
878 | for (;;) { | |
879 | if (len < (int)sizeof(*rtnh) || rtnh->rtnh_len > len) | |
880 | break; | |
881 | ||
882 | oif[oif_count] = rtnh->rtnh_ifindex; | |
883 | oif_count++; | |
884 | ||
3c04071d SW |
885 | if (rtnh->rtnh_len == 0) |
886 | break; | |
887 | ||
d62a17ae | 888 | len -= NLMSG_ALIGN(rtnh->rtnh_len); |
889 | rtnh = RTNH_NEXT(rtnh); | |
890 | } | |
891 | } | |
892 | ||
893 | if (IS_ZEBRA_DEBUG_KERNEL) { | |
822c9af2 SW |
894 | struct interface *ifp = NULL; |
895 | struct zebra_vrf *zvrf = NULL; | |
896 | ||
0af35d90 RW |
897 | strlcpy(sbuf, inet_ntoa(m->sg.src), sizeof(sbuf)); |
898 | strlcpy(gbuf, inet_ntoa(m->sg.grp), sizeof(gbuf)); | |
d62a17ae | 899 | for (count = 0; count < oif_count; count++) { |
900 | ifp = if_lookup_by_index(oif[count], vrf); | |
901 | char temp[256]; | |
902 | ||
5b4256ca DS |
903 | sprintf(temp, "%s(%d) ", ifp ? ifp->name : "Unknown", |
904 | oif[count]); | |
eab4a5c2 | 905 | strlcat(oif_list, temp, sizeof(oif_list)); |
d62a17ae | 906 | } |
822c9af2 | 907 | zvrf = zebra_vrf_lookup_by_id(vrf); |
d62a17ae | 908 | ifp = if_lookup_by_index(iif, vrf); |
822c9af2 SW |
909 | zlog_debug( |
910 | "MCAST VRF: %s(%d) %s (%s,%s) IIF: %s(%d) OIF: %s jiffies: %lld", | |
911 | (zvrf ? zvrf->vrf->name : "Unknown"), vrf, | |
912 | nl_msg_type_to_str(h->nlmsg_type), sbuf, gbuf, | |
913 | ifp ? ifp->name : "Unknown", iif, oif_list, | |
914 | m->lastused); | |
90d82769 | 915 | } |
d62a17ae | 916 | return 0; |
565fdc75 DS |
917 | } |
918 | ||
2414abd3 | 919 | int netlink_route_change(struct nlmsghdr *h, ns_id_t ns_id, int startup) |
565fdc75 | 920 | { |
d62a17ae | 921 | int len; |
d62a17ae | 922 | struct rtmsg *rtm; |
923 | ||
924 | rtm = NLMSG_DATA(h); | |
925 | ||
926 | if (!(h->nlmsg_type == RTM_NEWROUTE || h->nlmsg_type == RTM_DELROUTE)) { | |
927 | /* If this is not route add/delete message print warning. */ | |
9165c5f5 | 928 | zlog_debug("Kernel message: %s NS %u", |
87b5d1b0 | 929 | nl_msg_type_to_str(h->nlmsg_type), ns_id); |
d62a17ae | 930 | return 0; |
931 | } | |
932 | ||
c25e2f1a DS |
933 | if (!(rtm->rtm_family == AF_INET || |
934 | rtm->rtm_family == AF_INET6 || | |
935 | rtm->rtm_family == RTNL_FAMILY_IPMR )) { | |
9df414fe | 936 | flog_warn( |
e914ccbe | 937 | EC_ZEBRA_UNKNOWN_FAMILY, |
87b5d1b0 DS |
938 | "Invalid address family: %u received from kernel route change: %s", |
939 | rtm->rtm_family, nl_msg_type_to_str(h->nlmsg_type)); | |
8a1b681c SW |
940 | return 0; |
941 | } | |
942 | ||
d62a17ae | 943 | /* Connected route. */ |
944 | if (IS_ZEBRA_DEBUG_KERNEL) | |
78dd30b2 | 945 | zlog_debug("%s %s %s proto %s NS %u", |
d62a17ae | 946 | nl_msg_type_to_str(h->nlmsg_type), |
947 | nl_family_to_str(rtm->rtm_family), | |
948 | nl_rttype_to_str(rtm->rtm_type), | |
78dd30b2 | 949 | nl_rtproto_to_str(rtm->rtm_protocol), ns_id); |
d62a17ae | 950 | |
d62a17ae | 951 | |
952 | len = h->nlmsg_len - NLMSG_LENGTH(sizeof(struct rtmsg)); | |
9bdf8618 DS |
953 | if (len < 0) { |
954 | zlog_err("%s: Message received from netlink is of a broken size: %d %zu", | |
955 | __PRETTY_FUNCTION__, | |
956 | h->nlmsg_len, | |
957 | (size_t)NLMSG_LENGTH(sizeof(struct rtmsg))); | |
d62a17ae | 958 | return -1; |
9bdf8618 | 959 | } |
d62a17ae | 960 | |
e655a03c | 961 | if (rtm->rtm_type == RTN_MULTICAST) |
2414abd3 | 962 | netlink_route_change_read_multicast(h, ns_id, startup); |
e655a03c | 963 | else |
2414abd3 | 964 | netlink_route_change_read_unicast(h, ns_id, startup); |
d62a17ae | 965 | return 0; |
565fdc75 DS |
966 | } |
967 | ||
289602d7 | 968 | /* Request for specific route information from the kernel */ |
d62a17ae | 969 | static int netlink_request_route(struct zebra_ns *zns, int family, int type) |
289602d7 | 970 | { |
d62a17ae | 971 | struct { |
972 | struct nlmsghdr n; | |
973 | struct rtmsg rtm; | |
974 | } req; | |
975 | ||
976 | /* Form the request, specifying filter (rtattr) if needed. */ | |
977 | memset(&req, 0, sizeof(req)); | |
978 | req.n.nlmsg_type = type; | |
718f9b0f | 979 | req.n.nlmsg_flags = NLM_F_ROOT | NLM_F_MATCH | NLM_F_REQUEST; |
d62a17ae | 980 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)); |
981 | req.rtm.rtm_family = family; | |
982 | ||
983 | return netlink_request(&zns->netlink_cmd, &req.n); | |
289602d7 | 984 | } |
985 | ||
718e3744 | 986 | /* Routing table read function using netlink interface. Only called |
987 | bootstrap time. */ | |
d62a17ae | 988 | int netlink_route_read(struct zebra_ns *zns) |
718e3744 | 989 | { |
d62a17ae | 990 | int ret; |
85a75f1e MS |
991 | struct zebra_dplane_info dp_info; |
992 | ||
993 | zebra_dplane_info_from_zns(&dp_info, zns, true /*is_cmd*/); | |
d62a17ae | 994 | |
995 | /* Get IPv4 routing table. */ | |
996 | ret = netlink_request_route(zns, AF_INET, RTM_GETROUTE); | |
997 | if (ret < 0) | |
998 | return ret; | |
999 | ret = netlink_parse_info(netlink_route_change_read_unicast, | |
85a75f1e | 1000 | &zns->netlink_cmd, &dp_info, 0, 1); |
d62a17ae | 1001 | if (ret < 0) |
1002 | return ret; | |
1003 | ||
1004 | /* Get IPv6 routing table. */ | |
1005 | ret = netlink_request_route(zns, AF_INET6, RTM_GETROUTE); | |
1006 | if (ret < 0) | |
1007 | return ret; | |
1008 | ret = netlink_parse_info(netlink_route_change_read_unicast, | |
85a75f1e | 1009 | &zns->netlink_cmd, &dp_info, 0, 1); |
d62a17ae | 1010 | if (ret < 0) |
1011 | return ret; | |
1012 | ||
1013 | return 0; | |
718e3744 | 1014 | } |
1015 | ||
d7c0a89a QY |
1016 | static void _netlink_route_nl_add_gateway_info(uint8_t route_family, |
1017 | uint8_t gw_family, | |
d62a17ae | 1018 | struct nlmsghdr *nlmsg, |
1019 | size_t req_size, int bytelen, | |
81793ac1 | 1020 | const struct nexthop *nexthop) |
40c7bdb0 | 1021 | { |
d62a17ae | 1022 | if (route_family == AF_MPLS) { |
1023 | struct gw_family_t gw_fam; | |
1024 | ||
1025 | gw_fam.family = gw_family; | |
1026 | if (gw_family == AF_INET) | |
1027 | memcpy(&gw_fam.gate.ipv4, &nexthop->gate.ipv4, bytelen); | |
1028 | else | |
1029 | memcpy(&gw_fam.gate.ipv6, &nexthop->gate.ipv6, bytelen); | |
1030 | addattr_l(nlmsg, req_size, RTA_VIA, &gw_fam.family, | |
1031 | bytelen + 2); | |
1032 | } else { | |
1033 | if (gw_family == AF_INET) | |
1034 | addattr_l(nlmsg, req_size, RTA_GATEWAY, | |
1035 | &nexthop->gate.ipv4, bytelen); | |
1036 | else | |
1037 | addattr_l(nlmsg, req_size, RTA_GATEWAY, | |
1038 | &nexthop->gate.ipv6, bytelen); | |
1039 | } | |
40c7bdb0 | 1040 | } |
1041 | ||
d7c0a89a QY |
1042 | static void _netlink_route_rta_add_gateway_info(uint8_t route_family, |
1043 | uint8_t gw_family, | |
d62a17ae | 1044 | struct rtattr *rta, |
1045 | struct rtnexthop *rtnh, | |
1046 | size_t req_size, int bytelen, | |
81793ac1 | 1047 | const struct nexthop *nexthop) |
40c7bdb0 | 1048 | { |
d62a17ae | 1049 | if (route_family == AF_MPLS) { |
1050 | struct gw_family_t gw_fam; | |
1051 | ||
1052 | gw_fam.family = gw_family; | |
1053 | if (gw_family == AF_INET) | |
1054 | memcpy(&gw_fam.gate.ipv4, &nexthop->gate.ipv4, bytelen); | |
1055 | else | |
1056 | memcpy(&gw_fam.gate.ipv6, &nexthop->gate.ipv6, bytelen); | |
1057 | rta_addattr_l(rta, req_size, RTA_VIA, &gw_fam.family, | |
1058 | bytelen + 2); | |
1059 | rtnh->rtnh_len += RTA_LENGTH(bytelen + 2); | |
1060 | } else { | |
1061 | if (gw_family == AF_INET) | |
1062 | rta_addattr_l(rta, req_size, RTA_GATEWAY, | |
1063 | &nexthop->gate.ipv4, bytelen); | |
1064 | else | |
1065 | rta_addattr_l(rta, req_size, RTA_GATEWAY, | |
1066 | &nexthop->gate.ipv6, bytelen); | |
1067 | rtnh->rtnh_len += sizeof(struct rtattr) + bytelen; | |
1068 | } | |
40c7bdb0 | 1069 | } |
1070 | ||
b7537db6 SW |
1071 | static int build_label_stack(struct mpls_label_stack *nh_label, |
1072 | mpls_lse_t *out_lse, char *label_buf, | |
1073 | size_t label_buf_size) | |
1074 | { | |
1075 | char label_buf1[20]; | |
1076 | int num_labels = 0; | |
1077 | ||
1078 | for (int i = 0; nh_label && i < nh_label->num_labels; i++) { | |
1079 | if (nh_label->label[i] == MPLS_LABEL_IMPLICIT_NULL) | |
1080 | continue; | |
1081 | ||
1082 | if (IS_ZEBRA_DEBUG_KERNEL) { | |
1083 | if (!num_labels) | |
1084 | sprintf(label_buf, "label %u", | |
1085 | nh_label->label[i]); | |
1086 | else { | |
1087 | sprintf(label_buf1, "/%u", nh_label->label[i]); | |
1088 | strlcat(label_buf, label_buf1, label_buf_size); | |
1089 | } | |
1090 | } | |
1091 | ||
1092 | out_lse[num_labels] = | |
1093 | mpls_lse_encode(nh_label->label[i], 0, 0, 0); | |
1094 | num_labels++; | |
1095 | } | |
1096 | ||
1097 | return num_labels; | |
1098 | } | |
1099 | ||
fa713d9e CF |
1100 | /* This function takes a nexthop as argument and adds |
1101 | * the appropriate netlink attributes to an existing | |
1102 | * netlink message. | |
1103 | * | |
1104 | * @param routedesc: Human readable description of route type | |
1105 | * (direct/recursive, single-/multipath) | |
1106 | * @param bytelen: Length of addresses in bytes. | |
1107 | * @param nexthop: Nexthop information | |
1108 | * @param nlmsg: nlmsghdr structure to fill in. | |
1109 | * @param req_size: The size allocated for the message. | |
1110 | */ | |
d62a17ae | 1111 | static void _netlink_route_build_singlepath(const char *routedesc, int bytelen, |
81793ac1 | 1112 | const struct nexthop *nexthop, |
d62a17ae | 1113 | struct nlmsghdr *nlmsg, |
1114 | struct rtmsg *rtmsg, | |
1115 | size_t req_size, int cmd) | |
fa713d9e | 1116 | { |
b7537db6 | 1117 | |
d62a17ae | 1118 | mpls_lse_t out_lse[MPLS_MAX_LABELS]; |
9a62e84b | 1119 | char label_buf[256]; |
b7537db6 SW |
1120 | int num_labels = 0; |
1121 | ||
1122 | assert(nexthop); | |
d62a17ae | 1123 | |
1124 | /* | |
1125 | * label_buf is *only* currently used within debugging. | |
1126 | * As such when we assign it we are guarding it inside | |
1127 | * a debug test. If you want to change this make sure | |
1128 | * you fix this assumption | |
1129 | */ | |
1130 | label_buf[0] = '\0'; | |
d62a17ae | 1131 | |
b7537db6 SW |
1132 | num_labels = build_label_stack(nexthop->nh_label, out_lse, label_buf, |
1133 | sizeof(label_buf)); | |
fa712963 RW |
1134 | |
1135 | if (num_labels) { | |
1136 | /* Set the BoS bit */ | |
1137 | out_lse[num_labels - 1] |= htonl(1 << MPLS_LS_S_SHIFT); | |
1138 | ||
1139 | if (rtmsg->rtm_family == AF_MPLS) | |
1140 | addattr_l(nlmsg, req_size, RTA_NEWDST, &out_lse, | |
1141 | num_labels * sizeof(mpls_lse_t)); | |
1142 | else { | |
1143 | struct rtattr *nest; | |
d7c0a89a | 1144 | uint16_t encap = LWTUNNEL_ENCAP_MPLS; |
fa712963 RW |
1145 | |
1146 | addattr_l(nlmsg, req_size, RTA_ENCAP_TYPE, &encap, | |
d7c0a89a | 1147 | sizeof(uint16_t)); |
fa712963 RW |
1148 | nest = addattr_nest(nlmsg, req_size, RTA_ENCAP); |
1149 | addattr_l(nlmsg, req_size, MPLS_IPTUNNEL_DST, &out_lse, | |
1150 | num_labels * sizeof(mpls_lse_t)); | |
1151 | addattr_nest_end(nlmsg, nest); | |
66d42727 | 1152 | } |
0aabccc0 | 1153 | } |
fa713d9e | 1154 | |
d62a17ae | 1155 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ONLINK)) |
1156 | rtmsg->rtm_flags |= RTNH_F_ONLINK; | |
1157 | ||
1158 | if (rtmsg->rtm_family == AF_INET | |
1159 | && (nexthop->type == NEXTHOP_TYPE_IPV6 | |
1160 | || nexthop->type == NEXTHOP_TYPE_IPV6_IFINDEX)) { | |
1161 | rtmsg->rtm_flags |= RTNH_F_ONLINK; | |
1162 | addattr_l(nlmsg, req_size, RTA_GATEWAY, &ipv4_ll, 4); | |
1163 | addattr32(nlmsg, req_size, RTA_OIF, nexthop->ifindex); | |
1164 | ||
975a328e DA |
1165 | if (nexthop->rmap_src.ipv4.s_addr != INADDR_ANY |
1166 | && (cmd == RTM_NEWROUTE)) | |
d62a17ae | 1167 | addattr_l(nlmsg, req_size, RTA_PREFSRC, |
1168 | &nexthop->rmap_src.ipv4, bytelen); | |
975a328e DA |
1169 | else if (nexthop->src.ipv4.s_addr != INADDR_ANY |
1170 | && (cmd == RTM_NEWROUTE)) | |
d62a17ae | 1171 | addattr_l(nlmsg, req_size, RTA_PREFSRC, |
1172 | &nexthop->src.ipv4, bytelen); | |
1173 | ||
1174 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1175 | zlog_debug( | |
1176 | " 5549: _netlink_route_build_singlepath() (%s): " | |
7556c3fd | 1177 | "nexthop via %s %s if %u(%u)", |
d62a17ae | 1178 | routedesc, ipv4_ll_buf, label_buf, |
7556c3fd | 1179 | nexthop->ifindex, nexthop->vrf_id); |
d62a17ae | 1180 | return; |
0aabccc0 DD |
1181 | } |
1182 | ||
d62a17ae | 1183 | if (nexthop->type == NEXTHOP_TYPE_IPV4 |
1184 | || nexthop->type == NEXTHOP_TYPE_IPV4_IFINDEX) { | |
1185 | /* Send deletes to the kernel without specifying the next-hop */ | |
1186 | if (cmd != RTM_DELROUTE) | |
1187 | _netlink_route_nl_add_gateway_info( | |
1188 | rtmsg->rtm_family, AF_INET, nlmsg, req_size, | |
1189 | bytelen, nexthop); | |
1190 | ||
1191 | if (cmd == RTM_NEWROUTE) { | |
975a328e | 1192 | if (nexthop->rmap_src.ipv4.s_addr != INADDR_ANY) |
d62a17ae | 1193 | addattr_l(nlmsg, req_size, RTA_PREFSRC, |
1194 | &nexthop->rmap_src.ipv4, bytelen); | |
975a328e | 1195 | else if (nexthop->src.ipv4.s_addr != INADDR_ANY) |
d62a17ae | 1196 | addattr_l(nlmsg, req_size, RTA_PREFSRC, |
1197 | &nexthop->src.ipv4, bytelen); | |
1198 | } | |
1199 | ||
1200 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1201 | zlog_debug( | |
1202 | "netlink_route_multipath() (%s): " | |
7556c3fd | 1203 | "nexthop via %s %s if %u(%u)", |
d62a17ae | 1204 | routedesc, inet_ntoa(nexthop->gate.ipv4), |
7556c3fd | 1205 | label_buf, nexthop->ifindex, nexthop->vrf_id); |
0aabccc0 | 1206 | } |
fa713d9e | 1207 | |
d62a17ae | 1208 | if (nexthop->type == NEXTHOP_TYPE_IPV6 |
1209 | || nexthop->type == NEXTHOP_TYPE_IPV6_IFINDEX) { | |
1210 | _netlink_route_nl_add_gateway_info(rtmsg->rtm_family, AF_INET6, | |
1211 | nlmsg, req_size, bytelen, | |
1212 | nexthop); | |
1213 | ||
1214 | if (cmd == RTM_NEWROUTE) { | |
1215 | if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->rmap_src.ipv6)) | |
1216 | addattr_l(nlmsg, req_size, RTA_PREFSRC, | |
1217 | &nexthop->rmap_src.ipv6, bytelen); | |
1218 | else if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->src.ipv6)) | |
1219 | addattr_l(nlmsg, req_size, RTA_PREFSRC, | |
1220 | &nexthop->src.ipv6, bytelen); | |
1221 | } | |
fa713d9e | 1222 | |
d62a17ae | 1223 | if (IS_ZEBRA_DEBUG_KERNEL) |
1224 | zlog_debug( | |
1225 | "netlink_route_multipath() (%s): " | |
7556c3fd | 1226 | "nexthop via %s %s if %u(%u)", |
d62a17ae | 1227 | routedesc, inet6_ntoa(nexthop->gate.ipv6), |
7556c3fd | 1228 | label_buf, nexthop->ifindex, nexthop->vrf_id); |
d62a17ae | 1229 | } |
5e210522 DS |
1230 | |
1231 | /* | |
1232 | * We have the ifindex so we should always send it | |
1233 | * This is especially useful if we are doing route | |
1234 | * leaking. | |
1235 | */ | |
1236 | if (nexthop->type != NEXTHOP_TYPE_BLACKHOLE) | |
d62a17ae | 1237 | addattr32(nlmsg, req_size, RTA_OIF, nexthop->ifindex); |
1238 | ||
275565fb | 1239 | if (nexthop->type == NEXTHOP_TYPE_IFINDEX) { |
d62a17ae | 1240 | if (cmd == RTM_NEWROUTE) { |
975a328e | 1241 | if (nexthop->rmap_src.ipv4.s_addr != INADDR_ANY) |
d62a17ae | 1242 | addattr_l(nlmsg, req_size, RTA_PREFSRC, |
1243 | &nexthop->rmap_src.ipv4, bytelen); | |
975a328e | 1244 | else if (nexthop->src.ipv4.s_addr != INADDR_ANY) |
d62a17ae | 1245 | addattr_l(nlmsg, req_size, RTA_PREFSRC, |
1246 | &nexthop->src.ipv4, bytelen); | |
1247 | } | |
fa713d9e | 1248 | |
d62a17ae | 1249 | if (IS_ZEBRA_DEBUG_KERNEL) |
1250 | zlog_debug( | |
1251 | "netlink_route_multipath() (%s): " | |
7556c3fd DS |
1252 | "nexthop via if %u(%u)", |
1253 | routedesc, nexthop->ifindex, nexthop->vrf_id); | |
0aabccc0 | 1254 | } |
fa713d9e CF |
1255 | } |
1256 | ||
1257 | /* This function takes a nexthop as argument and | |
1258 | * appends to the given rtattr/rtnexthop pair the | |
1259 | * representation of the nexthop. If the nexthop | |
1260 | * defines a preferred source, the src parameter | |
1261 | * will be modified to point to that src, otherwise | |
1262 | * it will be kept unmodified. | |
1263 | * | |
1264 | * @param routedesc: Human readable description of route type | |
1265 | * (direct/recursive, single-/multipath) | |
1266 | * @param bytelen: Length of addresses in bytes. | |
1267 | * @param nexthop: Nexthop information | |
1268 | * @param rta: rtnetlink attribute structure | |
1269 | * @param rtnh: pointer to an rtnetlink nexthop structure | |
1270 | * @param src: pointer pointing to a location where | |
1271 | * the prefsrc should be stored. | |
1272 | */ | |
d62a17ae | 1273 | static void _netlink_route_build_multipath(const char *routedesc, int bytelen, |
81793ac1 | 1274 | const struct nexthop *nexthop, |
d62a17ae | 1275 | struct rtattr *rta, |
1276 | struct rtnexthop *rtnh, | |
1277 | struct rtmsg *rtmsg, | |
81793ac1 | 1278 | const union g_addr **src) |
fa713d9e | 1279 | { |
d62a17ae | 1280 | mpls_lse_t out_lse[MPLS_MAX_LABELS]; |
9a62e84b | 1281 | char label_buf[256]; |
b7537db6 | 1282 | int num_labels = 0; |
d62a17ae | 1283 | |
1284 | rtnh->rtnh_len = sizeof(*rtnh); | |
1285 | rtnh->rtnh_flags = 0; | |
1286 | rtnh->rtnh_hops = 0; | |
1287 | rta->rta_len += rtnh->rtnh_len; | |
1288 | ||
b7537db6 SW |
1289 | assert(nexthop); |
1290 | ||
d62a17ae | 1291 | /* |
1292 | * label_buf is *only* currently used within debugging. | |
1293 | * As such when we assign it we are guarding it inside | |
1294 | * a debug test. If you want to change this make sure | |
1295 | * you fix this assumption | |
1296 | */ | |
1297 | label_buf[0] = '\0'; | |
d62a17ae | 1298 | |
b7537db6 SW |
1299 | num_labels = build_label_stack(nexthop->nh_label, out_lse, label_buf, |
1300 | sizeof(label_buf)); | |
fa712963 RW |
1301 | |
1302 | if (num_labels) { | |
1303 | /* Set the BoS bit */ | |
1304 | out_lse[num_labels - 1] |= htonl(1 << MPLS_LS_S_SHIFT); | |
1305 | ||
1306 | if (rtmsg->rtm_family == AF_MPLS) { | |
1307 | rta_addattr_l(rta, NL_PKT_BUF_SIZE, RTA_NEWDST, | |
1308 | &out_lse, | |
1309 | num_labels * sizeof(mpls_lse_t)); | |
1310 | rtnh->rtnh_len += | |
1311 | RTA_LENGTH(num_labels * sizeof(mpls_lse_t)); | |
1312 | } else { | |
1313 | struct rtattr *nest; | |
d7c0a89a | 1314 | uint16_t encap = LWTUNNEL_ENCAP_MPLS; |
fa712963 RW |
1315 | int len = rta->rta_len; |
1316 | ||
1317 | rta_addattr_l(rta, NL_PKT_BUF_SIZE, RTA_ENCAP_TYPE, | |
d7c0a89a | 1318 | &encap, sizeof(uint16_t)); |
fa712963 RW |
1319 | nest = rta_nest(rta, NL_PKT_BUF_SIZE, RTA_ENCAP); |
1320 | rta_addattr_l(rta, NL_PKT_BUF_SIZE, MPLS_IPTUNNEL_DST, | |
1321 | &out_lse, | |
1322 | num_labels * sizeof(mpls_lse_t)); | |
1323 | rta_nest_end(rta, nest); | |
1324 | rtnh->rtnh_len += rta->rta_len - len; | |
66d42727 | 1325 | } |
d62a17ae | 1326 | } |
1327 | ||
1328 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ONLINK)) | |
1329 | rtnh->rtnh_flags |= RTNH_F_ONLINK; | |
1330 | ||
1331 | if (rtmsg->rtm_family == AF_INET | |
1332 | && (nexthop->type == NEXTHOP_TYPE_IPV6 | |
1333 | || nexthop->type == NEXTHOP_TYPE_IPV6_IFINDEX)) { | |
1334 | bytelen = 4; | |
1335 | rtnh->rtnh_flags |= RTNH_F_ONLINK; | |
1336 | rta_addattr_l(rta, NL_PKT_BUF_SIZE, RTA_GATEWAY, &ipv4_ll, | |
1337 | bytelen); | |
1338 | rtnh->rtnh_len += sizeof(struct rtattr) + bytelen; | |
1339 | rtnh->rtnh_ifindex = nexthop->ifindex; | |
1340 | ||
975a328e | 1341 | if (nexthop->rmap_src.ipv4.s_addr != INADDR_ANY) |
d62a17ae | 1342 | *src = &nexthop->rmap_src; |
975a328e | 1343 | else if (nexthop->src.ipv4.s_addr != INADDR_ANY) |
d62a17ae | 1344 | *src = &nexthop->src; |
1345 | ||
1346 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1347 | zlog_debug( | |
1348 | " 5549: netlink_route_build_multipath() (%s): " | |
1349 | "nexthop via %s %s if %u", | |
1350 | routedesc, ipv4_ll_buf, label_buf, | |
1351 | nexthop->ifindex); | |
1352 | return; | |
1353 | } | |
1354 | ||
1355 | if (nexthop->type == NEXTHOP_TYPE_IPV4 | |
1356 | || nexthop->type == NEXTHOP_TYPE_IPV4_IFINDEX) { | |
1357 | _netlink_route_rta_add_gateway_info(rtmsg->rtm_family, AF_INET, | |
1358 | rta, rtnh, NL_PKT_BUF_SIZE, | |
1359 | bytelen, nexthop); | |
975a328e | 1360 | if (nexthop->rmap_src.ipv4.s_addr != INADDR_ANY) |
d62a17ae | 1361 | *src = &nexthop->rmap_src; |
975a328e | 1362 | else if (nexthop->src.ipv4.s_addr != INADDR_ANY) |
d62a17ae | 1363 | *src = &nexthop->src; |
1364 | ||
1365 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1366 | zlog_debug( | |
1367 | "netlink_route_multipath() (%s): " | |
1368 | "nexthop via %s %s if %u", | |
1369 | routedesc, inet_ntoa(nexthop->gate.ipv4), | |
1370 | label_buf, nexthop->ifindex); | |
1371 | } | |
1372 | if (nexthop->type == NEXTHOP_TYPE_IPV6 | |
1373 | || nexthop->type == NEXTHOP_TYPE_IPV6_IFINDEX) { | |
1374 | _netlink_route_rta_add_gateway_info(rtmsg->rtm_family, AF_INET6, | |
1375 | rta, rtnh, NL_PKT_BUF_SIZE, | |
1376 | bytelen, nexthop); | |
1377 | ||
1378 | if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->rmap_src.ipv6)) | |
1379 | *src = &nexthop->rmap_src; | |
1380 | else if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->src.ipv6)) | |
1381 | *src = &nexthop->src; | |
1382 | ||
1383 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1384 | zlog_debug( | |
1385 | "netlink_route_multipath() (%s): " | |
1386 | "nexthop via %s %s if %u", | |
1387 | routedesc, inet6_ntoa(nexthop->gate.ipv6), | |
1388 | label_buf, nexthop->ifindex); | |
1389 | } | |
5e210522 DS |
1390 | |
1391 | /* | |
1392 | * We have figured out the ifindex so we should always send it | |
1393 | * This is especially useful if we are doing route | |
1394 | * leaking. | |
1395 | */ | |
1396 | if (nexthop->type != NEXTHOP_TYPE_BLACKHOLE) | |
1397 | rtnh->rtnh_ifindex = nexthop->ifindex; | |
1398 | ||
d62a17ae | 1399 | /* ifindex */ |
275565fb | 1400 | if (nexthop->type == NEXTHOP_TYPE_IFINDEX) { |
975a328e | 1401 | if (nexthop->rmap_src.ipv4.s_addr != INADDR_ANY) |
d62a17ae | 1402 | *src = &nexthop->rmap_src; |
975a328e | 1403 | else if (nexthop->src.ipv4.s_addr != INADDR_ANY) |
d62a17ae | 1404 | *src = &nexthop->src; |
1405 | ||
1406 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1407 | zlog_debug( | |
1408 | "netlink_route_multipath() (%s): " | |
1409 | "nexthop via if %u", | |
1410 | routedesc, nexthop->ifindex); | |
d62a17ae | 1411 | } |
df7fb580 DS |
1412 | |
1413 | if (nexthop->weight) | |
1414 | rtnh->rtnh_hops = nexthop->weight - 1; | |
fa713d9e CF |
1415 | } |
1416 | ||
d62a17ae | 1417 | static inline void _netlink_mpls_build_singlepath(const char *routedesc, |
81793ac1 | 1418 | const zebra_nhlfe_t *nhlfe, |
d62a17ae | 1419 | struct nlmsghdr *nlmsg, |
1420 | struct rtmsg *rtmsg, | |
1421 | size_t req_size, int cmd) | |
40c7bdb0 | 1422 | { |
d62a17ae | 1423 | int bytelen; |
d7c0a89a | 1424 | uint8_t family; |
40c7bdb0 | 1425 | |
d62a17ae | 1426 | family = NHLFE_FAMILY(nhlfe); |
1427 | bytelen = (family == AF_INET ? 4 : 16); | |
1428 | _netlink_route_build_singlepath(routedesc, bytelen, nhlfe->nexthop, | |
1429 | nlmsg, rtmsg, req_size, cmd); | |
40c7bdb0 | 1430 | } |
1431 | ||
1432 | ||
1433 | static inline void | |
81793ac1 | 1434 | _netlink_mpls_build_multipath(const char *routedesc, const zebra_nhlfe_t *nhlfe, |
d62a17ae | 1435 | struct rtattr *rta, struct rtnexthop *rtnh, |
81793ac1 | 1436 | struct rtmsg *rtmsg, const union g_addr **src) |
40c7bdb0 | 1437 | { |
d62a17ae | 1438 | int bytelen; |
d7c0a89a | 1439 | uint8_t family; |
40c7bdb0 | 1440 | |
d62a17ae | 1441 | family = NHLFE_FAMILY(nhlfe); |
1442 | bytelen = (family == AF_INET ? 4 : 16); | |
1443 | _netlink_route_build_multipath(routedesc, bytelen, nhlfe->nexthop, rta, | |
1444 | rtnh, rtmsg, src); | |
40c7bdb0 | 1445 | } |
1446 | ||
1447 | ||
fa713d9e CF |
1448 | /* Log debug information for netlink_route_multipath |
1449 | * if debug logging is enabled. | |
1450 | * | |
1451 | * @param cmd: Netlink command which is to be processed | |
1452 | * @param p: Prefix for which the change is due | |
fa713d9e | 1453 | * @param family: Address family which the change concerns |
45df4e96 DS |
1454 | * @param zvrf: The vrf we are in |
1455 | * @param tableid: The table we are working on | |
fa713d9e | 1456 | */ |
86391e56 MS |
1457 | static void _netlink_route_debug(int cmd, const struct prefix *p, |
1458 | int family, vrf_id_t vrfid, | |
7556c3fd | 1459 | uint32_t tableid) |
fa713d9e | 1460 | { |
d62a17ae | 1461 | if (IS_ZEBRA_DEBUG_KERNEL) { |
1462 | char buf[PREFIX_STRLEN]; | |
1463 | zlog_debug( | |
45df4e96 DS |
1464 | "netlink_route_multipath(): %s %s vrf %u(%u)", |
1465 | nl_msg_type_to_str(cmd), | |
1466 | prefix2str(p, buf, sizeof(buf)), | |
86391e56 | 1467 | vrfid, tableid); |
d62a17ae | 1468 | } |
1469 | } | |
1470 | ||
e8968ccb SW |
1471 | static void _netlink_nexthop_debug(int cmd, uint32_t id) |
1472 | { | |
1473 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1474 | zlog_debug("netlink_nexthop(): %s, id=%u", | |
1475 | nl_msg_type_to_str(cmd), id); | |
1476 | } | |
1477 | ||
d7c0a89a | 1478 | static void _netlink_mpls_debug(int cmd, uint32_t label, const char *routedesc) |
40c7bdb0 | 1479 | { |
d62a17ae | 1480 | if (IS_ZEBRA_DEBUG_KERNEL) |
1481 | zlog_debug("netlink_mpls_multipath() (%s): %s %u/20", routedesc, | |
1482 | nl_msg_type_to_str(cmd), label); | |
fa713d9e CF |
1483 | } |
1484 | ||
d62a17ae | 1485 | static int netlink_neigh_update(int cmd, int ifindex, uint32_t addr, char *lla, |
5895d33f | 1486 | int llalen, ns_id_t ns_id) |
5c610faf | 1487 | { |
f3dbec60 | 1488 | uint8_t protocol = RTPROT_ZEBRA; |
d62a17ae | 1489 | struct { |
1490 | struct nlmsghdr n; | |
1491 | struct ndmsg ndm; | |
1492 | char buf[256]; | |
1493 | } req; | |
5c610faf | 1494 | |
5895d33f | 1495 | struct zebra_ns *zns = zebra_ns_lookup(ns_id); |
8f7d9fc0 | 1496 | |
5605ecfc | 1497 | memset(&req, 0, sizeof(req)); |
5c610faf | 1498 | |
d62a17ae | 1499 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)); |
1500 | req.n.nlmsg_flags = NLM_F_CREATE | NLM_F_REQUEST; | |
1501 | req.n.nlmsg_type = cmd; // RTM_NEWNEIGH or RTM_DELNEIGH | |
1502 | req.n.nlmsg_pid = zns->netlink_cmd.snl.nl_pid; | |
a55ba23f | 1503 | |
d62a17ae | 1504 | req.ndm.ndm_family = AF_INET; |
1505 | req.ndm.ndm_state = NUD_PERMANENT; | |
1506 | req.ndm.ndm_ifindex = ifindex; | |
1507 | req.ndm.ndm_type = RTN_UNICAST; | |
5c610faf | 1508 | |
f3dbec60 DS |
1509 | addattr_l(&req.n, sizeof(req), |
1510 | NDA_PROTOCOL, &protocol, sizeof(protocol)); | |
d62a17ae | 1511 | addattr_l(&req.n, sizeof(req), NDA_DST, &addr, 4); |
1512 | addattr_l(&req.n, sizeof(req), NDA_LLADDR, lla, llalen); | |
5c610faf | 1513 | |
d62a17ae | 1514 | return netlink_talk(netlink_talk_filter, &req.n, &zns->netlink_cmd, zns, |
1515 | 0); | |
5c610faf DS |
1516 | } |
1517 | ||
7cdb1a84 MS |
1518 | /* |
1519 | * Routing table change via netlink interface, using a dataplane context object | |
1520 | */ | |
25779064 | 1521 | static int netlink_route_multipath(int cmd, struct zebra_dplane_ctx *ctx) |
7cdb1a84 MS |
1522 | { |
1523 | int bytelen; | |
7cdb1a84 MS |
1524 | struct nexthop *nexthop = NULL; |
1525 | unsigned int nexthop_num; | |
1526 | int family; | |
1527 | const char *routedesc; | |
1528 | int setsrc = 0; | |
1529 | union g_addr src; | |
1530 | const struct prefix *p, *src_p; | |
1531 | uint32_t table_id; | |
1532 | ||
1533 | struct { | |
1534 | struct nlmsghdr n; | |
1535 | struct rtmsg r; | |
1536 | char buf[NL_PKT_BUF_SIZE]; | |
1537 | } req; | |
1538 | ||
1539 | p = dplane_ctx_get_dest(ctx); | |
1540 | src_p = dplane_ctx_get_src(ctx); | |
1541 | ||
1542 | family = PREFIX_FAMILY(p); | |
1543 | ||
5709131c | 1544 | memset(&req, 0, sizeof(req) - NL_PKT_BUF_SIZE); |
7cdb1a84 MS |
1545 | |
1546 | bytelen = (family == AF_INET ? 4 : 16); | |
1547 | ||
1548 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)); | |
1549 | req.n.nlmsg_flags = NLM_F_CREATE | NLM_F_REQUEST; | |
1550 | ||
334734a8 DS |
1551 | if ((cmd == RTM_NEWROUTE) && |
1552 | ((p->family == AF_INET) || v6_rr_semantics)) | |
1553 | req.n.nlmsg_flags |= NLM_F_REPLACE; | |
7cdb1a84 MS |
1554 | |
1555 | req.n.nlmsg_type = cmd; | |
1556 | ||
1557 | req.n.nlmsg_pid = dplane_ctx_get_ns(ctx)->nls.snl.nl_pid; | |
1558 | ||
1559 | req.r.rtm_family = family; | |
1560 | req.r.rtm_dst_len = p->prefixlen; | |
1561 | req.r.rtm_src_len = src_p ? src_p->prefixlen : 0; | |
1562 | req.r.rtm_scope = RT_SCOPE_UNIVERSE; | |
1563 | ||
5709131c | 1564 | if (cmd == RTM_DELROUTE) |
7cdb1a84 | 1565 | req.r.rtm_protocol = zebra2proto(dplane_ctx_get_old_type(ctx)); |
5709131c | 1566 | else |
7cdb1a84 | 1567 | req.r.rtm_protocol = zebra2proto(dplane_ctx_get_type(ctx)); |
7cdb1a84 MS |
1568 | |
1569 | /* | |
1570 | * blackhole routes are not RTN_UNICAST, they are | |
1571 | * RTN_ BLACKHOLE|UNREACHABLE|PROHIBIT | |
1572 | * so setting this value as a RTN_UNICAST would | |
1573 | * cause the route lookup of just the prefix | |
1574 | * to fail. So no need to specify this for | |
1575 | * the RTM_DELROUTE case | |
1576 | */ | |
1577 | if (cmd != RTM_DELROUTE) | |
1578 | req.r.rtm_type = RTN_UNICAST; | |
1579 | ||
5709131c | 1580 | addattr_l(&req.n, sizeof(req), RTA_DST, &p->u.prefix, bytelen); |
7cdb1a84 | 1581 | if (src_p) |
5709131c | 1582 | addattr_l(&req.n, sizeof(req), RTA_SRC, &src_p->u.prefix, |
7cdb1a84 MS |
1583 | bytelen); |
1584 | ||
1585 | /* Metric. */ | |
1586 | /* Hardcode the metric for all routes coming from zebra. Metric isn't | |
1587 | * used | |
1588 | * either by the kernel or by zebra. Its purely for calculating best | |
1589 | * path(s) | |
1590 | * by the routing protocol and for communicating with protocol peers. | |
1591 | */ | |
5709131c | 1592 | addattr32(&req.n, sizeof(req), RTA_PRIORITY, NL_DEFAULT_ROUTE_METRIC); |
7cdb1a84 MS |
1593 | |
1594 | #if defined(SUPPORT_REALMS) | |
1595 | { | |
1596 | route_tag_t tag; | |
1597 | ||
5709131c | 1598 | if (cmd == RTM_DELROUTE) |
7cdb1a84 | 1599 | tag = dplane_ctx_get_old_tag(ctx); |
5709131c | 1600 | else |
7cdb1a84 | 1601 | tag = dplane_ctx_get_tag(ctx); |
7cdb1a84 MS |
1602 | |
1603 | if (tag > 0 && tag <= 255) | |
5709131c | 1604 | addattr32(&req.n, sizeof(req), RTA_FLOW, tag); |
7cdb1a84 MS |
1605 | } |
1606 | #endif | |
1607 | /* Table corresponding to this route. */ | |
1608 | table_id = dplane_ctx_get_table(ctx); | |
1609 | if (table_id < 256) | |
1610 | req.r.rtm_table = table_id; | |
1611 | else { | |
1612 | req.r.rtm_table = RT_TABLE_UNSPEC; | |
5709131c | 1613 | addattr32(&req.n, sizeof(req), RTA_TABLE, table_id); |
7cdb1a84 MS |
1614 | } |
1615 | ||
1616 | _netlink_route_debug(cmd, p, family, dplane_ctx_get_vrf(ctx), table_id); | |
1617 | ||
1618 | /* | |
1619 | * If we are not updating the route and we have received | |
1620 | * a route delete, then all we need to fill in is the | |
1621 | * prefix information to tell the kernel to schwack | |
1622 | * it. | |
1623 | */ | |
1624 | if (cmd == RTM_DELROUTE) | |
1625 | goto skip; | |
1626 | ||
1627 | if (dplane_ctx_get_mtu(ctx) || dplane_ctx_get_nh_mtu(ctx)) { | |
1628 | char buf[NL_PKT_BUF_SIZE]; | |
1629 | struct rtattr *rta = (void *)buf; | |
1630 | uint32_t mtu = dplane_ctx_get_mtu(ctx); | |
1631 | uint32_t nexthop_mtu = dplane_ctx_get_nh_mtu(ctx); | |
5709131c | 1632 | |
7cdb1a84 MS |
1633 | if (!mtu || (nexthop_mtu && nexthop_mtu < mtu)) |
1634 | mtu = nexthop_mtu; | |
1635 | rta->rta_type = RTA_METRICS; | |
1636 | rta->rta_len = RTA_LENGTH(0); | |
5709131c MS |
1637 | rta_addattr_l(rta, NL_PKT_BUF_SIZE, |
1638 | RTAX_MTU, &mtu, sizeof(mtu)); | |
7cdb1a84 MS |
1639 | addattr_l(&req.n, NL_PKT_BUF_SIZE, RTA_METRICS, RTA_DATA(rta), |
1640 | RTA_PAYLOAD(rta)); | |
1641 | } | |
1642 | ||
7c99d51b | 1643 | if (kernel_nexthops_supported()) { |
de3f5488 SW |
1644 | /* Kernel supports nexthop objects */ |
1645 | addattr32(&req.n, sizeof(req), RTA_NH_ID, | |
1646 | dplane_ctx_get_nhe_id(ctx)); | |
1647 | goto skip; | |
1648 | } | |
1649 | ||
7cdb1a84 | 1650 | /* Count overall nexthops so we can decide whether to use singlepath |
5709131c MS |
1651 | * or multipath case. |
1652 | */ | |
7cdb1a84 MS |
1653 | nexthop_num = 0; |
1654 | for (ALL_NEXTHOPS_PTR(dplane_ctx_get_ng(ctx), nexthop)) { | |
1655 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_RECURSIVE)) | |
1656 | continue; | |
1657 | if (cmd == RTM_NEWROUTE && !NEXTHOP_IS_ACTIVE(nexthop->flags)) | |
1658 | continue; | |
1659 | ||
1660 | nexthop_num++; | |
1661 | } | |
1662 | ||
1663 | /* Singlepath case. */ | |
220f0f42 | 1664 | if (nexthop_num == 1) { |
7cdb1a84 MS |
1665 | nexthop_num = 0; |
1666 | for (ALL_NEXTHOPS_PTR(dplane_ctx_get_ng(ctx), nexthop)) { | |
1667 | /* | |
1668 | * So we want to cover 2 types of blackhole | |
1669 | * routes here: | |
1670 | * 1) A normal blackhole route( ala from a static | |
1671 | * install. | |
1672 | * 2) A recursively resolved blackhole route | |
1673 | */ | |
1674 | if (nexthop->type == NEXTHOP_TYPE_BLACKHOLE) { | |
1675 | switch (nexthop->bh_type) { | |
1676 | case BLACKHOLE_ADMINPROHIB: | |
1677 | req.r.rtm_type = RTN_PROHIBIT; | |
1678 | break; | |
1679 | case BLACKHOLE_REJECT: | |
1680 | req.r.rtm_type = RTN_UNREACHABLE; | |
1681 | break; | |
1682 | default: | |
1683 | req.r.rtm_type = RTN_BLACKHOLE; | |
1684 | break; | |
1685 | } | |
1686 | goto skip; | |
1687 | } | |
1688 | if (CHECK_FLAG(nexthop->flags, | |
1689 | NEXTHOP_FLAG_RECURSIVE)) { | |
5709131c MS |
1690 | |
1691 | if (setsrc) | |
1692 | continue; | |
1693 | ||
1694 | if (family == AF_INET) { | |
1695 | if (nexthop->rmap_src.ipv4.s_addr | |
1696 | != 0) { | |
1697 | src.ipv4 = | |
1698 | nexthop->rmap_src.ipv4; | |
1699 | setsrc = 1; | |
1700 | } else if (nexthop->src.ipv4.s_addr | |
1701 | != 0) { | |
1702 | src.ipv4 = | |
1703 | nexthop->src.ipv4; | |
1704 | setsrc = 1; | |
1705 | } | |
1706 | } else if (family == AF_INET6) { | |
1707 | if (!IN6_IS_ADDR_UNSPECIFIED( | |
1708 | &nexthop->rmap_src.ipv6)) { | |
1709 | src.ipv6 = | |
1710 | nexthop->rmap_src.ipv6; | |
1711 | setsrc = 1; | |
1712 | } else if ( | |
1713 | !IN6_IS_ADDR_UNSPECIFIED( | |
1714 | &nexthop->src.ipv6)) { | |
1715 | src.ipv6 = | |
1716 | nexthop->src.ipv6; | |
1717 | setsrc = 1; | |
7cdb1a84 MS |
1718 | } |
1719 | } | |
f183e380 | 1720 | continue; |
7cdb1a84 MS |
1721 | } |
1722 | ||
1723 | if ((cmd == RTM_NEWROUTE | |
1724 | && NEXTHOP_IS_ACTIVE(nexthop->flags))) { | |
1725 | routedesc = nexthop->rparent | |
1726 | ? "recursive, single-path" | |
1727 | : "single-path"; | |
1728 | ||
1729 | _netlink_route_build_singlepath( | |
1730 | routedesc, bytelen, nexthop, &req.n, | |
5709131c | 1731 | &req.r, sizeof(req), cmd); |
7cdb1a84 MS |
1732 | nexthop_num++; |
1733 | break; | |
1734 | } | |
1735 | } | |
1736 | if (setsrc && (cmd == RTM_NEWROUTE)) { | |
1737 | if (family == AF_INET) | |
5709131c | 1738 | addattr_l(&req.n, sizeof(req), RTA_PREFSRC, |
7cdb1a84 MS |
1739 | &src.ipv4, bytelen); |
1740 | else if (family == AF_INET6) | |
5709131c | 1741 | addattr_l(&req.n, sizeof(req), RTA_PREFSRC, |
7cdb1a84 MS |
1742 | &src.ipv6, bytelen); |
1743 | } | |
1744 | } else { /* Multipath case */ | |
1745 | char buf[NL_PKT_BUF_SIZE]; | |
1746 | struct rtattr *rta = (void *)buf; | |
1747 | struct rtnexthop *rtnh; | |
81793ac1 | 1748 | const union g_addr *src1 = NULL; |
7cdb1a84 MS |
1749 | |
1750 | rta->rta_type = RTA_MULTIPATH; | |
1751 | rta->rta_len = RTA_LENGTH(0); | |
1752 | rtnh = RTA_DATA(rta); | |
1753 | ||
1754 | nexthop_num = 0; | |
1755 | for (ALL_NEXTHOPS_PTR(dplane_ctx_get_ng(ctx), nexthop)) { | |
7cdb1a84 MS |
1756 | if (CHECK_FLAG(nexthop->flags, |
1757 | NEXTHOP_FLAG_RECURSIVE)) { | |
1758 | /* This only works for IPv4 now */ | |
5709131c MS |
1759 | if (setsrc) |
1760 | continue; | |
1761 | ||
1762 | if (family == AF_INET) { | |
1763 | if (nexthop->rmap_src.ipv4.s_addr | |
1764 | != 0) { | |
1765 | src.ipv4 = | |
1766 | nexthop->rmap_src.ipv4; | |
1767 | setsrc = 1; | |
1768 | } else if (nexthop->src.ipv4.s_addr | |
1769 | != 0) { | |
1770 | src.ipv4 = | |
1771 | nexthop->src.ipv4; | |
1772 | setsrc = 1; | |
1773 | } | |
1774 | } else if (family == AF_INET6) { | |
1775 | if (!IN6_IS_ADDR_UNSPECIFIED( | |
1776 | &nexthop->rmap_src.ipv6)) { | |
1777 | src.ipv6 = | |
1778 | nexthop->rmap_src.ipv6; | |
1779 | setsrc = 1; | |
1780 | } else if ( | |
1781 | !IN6_IS_ADDR_UNSPECIFIED( | |
1782 | &nexthop->src.ipv6)) { | |
1783 | src.ipv6 = | |
1784 | nexthop->src.ipv6; | |
1785 | setsrc = 1; | |
7cdb1a84 MS |
1786 | } |
1787 | } | |
78e54ded MS |
1788 | |
1789 | continue; | |
7cdb1a84 MS |
1790 | } |
1791 | ||
1792 | if ((cmd == RTM_NEWROUTE | |
1793 | && NEXTHOP_IS_ACTIVE(nexthop->flags))) { | |
1794 | routedesc = nexthop->rparent | |
1795 | ? "recursive, multipath" | |
1796 | : "multipath"; | |
1797 | nexthop_num++; | |
1798 | ||
1799 | _netlink_route_build_multipath( | |
1800 | routedesc, bytelen, nexthop, rta, rtnh, | |
1801 | &req.r, &src1); | |
1802 | rtnh = RTNH_NEXT(rtnh); | |
1803 | ||
1804 | if (!setsrc && src1) { | |
1805 | if (family == AF_INET) | |
1806 | src.ipv4 = src1->ipv4; | |
1807 | else if (family == AF_INET6) | |
1808 | src.ipv6 = src1->ipv6; | |
1809 | ||
1810 | setsrc = 1; | |
1811 | } | |
1812 | } | |
1813 | } | |
1814 | if (setsrc && (cmd == RTM_NEWROUTE)) { | |
1815 | if (family == AF_INET) | |
5709131c | 1816 | addattr_l(&req.n, sizeof(req), RTA_PREFSRC, |
7cdb1a84 MS |
1817 | &src.ipv4, bytelen); |
1818 | else if (family == AF_INET6) | |
5709131c | 1819 | addattr_l(&req.n, sizeof(req), RTA_PREFSRC, |
7cdb1a84 MS |
1820 | &src.ipv6, bytelen); |
1821 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1822 | zlog_debug("Setting source"); | |
1823 | } | |
1824 | ||
1825 | if (rta->rta_len > RTA_LENGTH(0)) | |
1826 | addattr_l(&req.n, NL_PKT_BUF_SIZE, RTA_MULTIPATH, | |
1827 | RTA_DATA(rta), RTA_PAYLOAD(rta)); | |
1828 | } | |
1829 | ||
1830 | /* If there is no useful nexthop then return. */ | |
1831 | if (nexthop_num == 0) { | |
1832 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1833 | zlog_debug( | |
1834 | "netlink_route_multipath(): No useful nexthop."); | |
1835 | return 0; | |
1836 | } | |
1837 | ||
1838 | skip: | |
7cdb1a84 MS |
1839 | /* Talk to netlink socket. */ |
1840 | return netlink_talk_info(netlink_talk_filter, &req.n, | |
1841 | dplane_ctx_get_ns(ctx), 0); | |
1842 | } | |
1843 | ||
43b5cc5e | 1844 | int kernel_get_ipmr_sg_stats(struct zebra_vrf *zvrf, void *in) |
e3be0432 | 1845 | { |
5523c156 | 1846 | uint32_t actual_table; |
d62a17ae | 1847 | int suc = 0; |
1848 | struct mcast_route_data *mr = (struct mcast_route_data *)in; | |
bd8b9272 DS |
1849 | struct { |
1850 | struct nlmsghdr n; | |
1851 | struct ndmsg ndm; | |
1852 | char buf[256]; | |
1853 | } req; | |
e3be0432 | 1854 | |
d62a17ae | 1855 | mroute = mr; |
5895d33f | 1856 | struct zebra_ns *zns; |
bd8b9272 | 1857 | |
009f8ad5 | 1858 | zns = zvrf->zns; |
5605ecfc | 1859 | memset(&req, 0, sizeof(req)); |
bd8b9272 DS |
1860 | |
1861 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)); | |
1862 | req.n.nlmsg_flags = NLM_F_REQUEST; | |
1863 | req.n.nlmsg_pid = zns->netlink_cmd.snl.nl_pid; | |
1864 | ||
1865 | req.ndm.ndm_family = RTNL_FAMILY_IPMR; | |
1866 | req.n.nlmsg_type = RTM_GETROUTE; | |
1867 | ||
1868 | addattr_l(&req.n, sizeof(req), RTA_IIF, &mroute->ifindex, 4); | |
1869 | addattr_l(&req.n, sizeof(req), RTA_OIF, &mroute->ifindex, 4); | |
1870 | addattr_l(&req.n, sizeof(req), RTA_SRC, &mroute->sg.src.s_addr, 4); | |
1871 | addattr_l(&req.n, sizeof(req), RTA_DST, &mroute->sg.grp.s_addr, 4); | |
5523c156 DS |
1872 | /* |
1873 | * What? | |
1874 | * | |
1875 | * So during the namespace cleanup we started storing | |
1876 | * the zvrf table_id for the default table as RT_TABLE_MAIN | |
1877 | * which is what the normal routing table for ip routing is. | |
1878 | * This change caused this to break our lookups of sg data | |
1879 | * because prior to this change the zvrf->table_id was 0 | |
1880 | * and when the pim multicast kernel code saw a 0, | |
1881 | * it was auto-translated to RT_TABLE_DEFAULT. But since | |
1882 | * we are now passing in RT_TABLE_MAIN there is no auto-translation | |
1883 | * and the kernel goes screw you and the delicious cookies you | |
1884 | * are trying to give me. So now we have this little hack. | |
1885 | */ | |
1886 | actual_table = (zvrf->table_id == RT_TABLE_MAIN) ? RT_TABLE_DEFAULT : | |
1887 | zvrf->table_id; | |
1888 | addattr_l(&req.n, sizeof(req), RTA_TABLE, &actual_table, 4); | |
e3be0432 | 1889 | |
bd8b9272 DS |
1890 | suc = netlink_talk(netlink_route_change_read_multicast, &req.n, |
1891 | &zns->netlink_cmd, zns, 0); | |
e3be0432 | 1892 | |
bd8b9272 | 1893 | mroute = NULL; |
d62a17ae | 1894 | return suc; |
e3be0432 DS |
1895 | } |
1896 | ||
8d03bc50 SW |
1897 | /* Char length to debug ID with */ |
1898 | #define ID_LENGTH 10 | |
1899 | ||
565ce0d3 | 1900 | static void _netlink_nexthop_build_group(struct nlmsghdr *n, size_t req_size, |
8d03bc50 | 1901 | uint32_t id, |
e22e8001 | 1902 | const struct nh_grp *z_grp, |
0c8215cb | 1903 | const uint8_t count) |
565ce0d3 | 1904 | { |
565ce0d3 | 1905 | struct nexthop_grp grp[count]; |
8d03bc50 SW |
1906 | /* Need space for max group size, "/", and null term */ |
1907 | char buf[(MULTIPATH_NUM * (ID_LENGTH + 1)) + 1]; | |
1908 | char buf1[ID_LENGTH + 2]; | |
1909 | ||
1910 | buf[0] = '\0'; | |
565ce0d3 SW |
1911 | |
1912 | memset(grp, 0, sizeof(grp)); | |
1913 | ||
1914 | if (count) { | |
0c8215cb | 1915 | for (int i = 0; i < count; i++) { |
e22e8001 | 1916 | grp[i].id = z_grp[i].id; |
df7fb580 | 1917 | grp[i].weight = z_grp[i].weight - 1; |
8d03bc50 SW |
1918 | |
1919 | if (IS_ZEBRA_DEBUG_KERNEL) { | |
1920 | if (i == 0) | |
1921 | snprintf(buf, sizeof(buf1), "group %u", | |
1922 | grp[i].id); | |
1923 | else { | |
1924 | snprintf(buf1, sizeof(buf1), "/%u", | |
1925 | grp[i].id); | |
1926 | strlcat(buf, buf1, sizeof(buf)); | |
1927 | } | |
1928 | } | |
565ce0d3 | 1929 | } |
0c8215cb | 1930 | addattr_l(n, req_size, NHA_GROUP, grp, count * sizeof(*grp)); |
565ce0d3 | 1931 | } |
8d03bc50 SW |
1932 | |
1933 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1934 | zlog_debug("%s: ID (%u): %s", __func__, id, buf); | |
565ce0d3 SW |
1935 | } |
1936 | ||
f820d025 SW |
1937 | /** |
1938 | * netlink_nexthop() - Nexthop change via the netlink interface | |
1939 | * | |
1940 | * @ctx: Dataplane ctx | |
1941 | * | |
1942 | * Return: Result status | |
1943 | */ | |
1944 | static int netlink_nexthop(int cmd, struct zebra_dplane_ctx *ctx) | |
1945 | { | |
f820d025 SW |
1946 | struct { |
1947 | struct nlmsghdr n; | |
1948 | struct nhmsg nhm; | |
1949 | char buf[NL_PKT_BUF_SIZE]; | |
1950 | } req; | |
1951 | ||
8d03bc50 SW |
1952 | mpls_lse_t out_lse[MPLS_MAX_LABELS]; |
1953 | char label_buf[256]; | |
1954 | int num_labels = 0; | |
1955 | size_t req_size = sizeof(req); | |
1956 | ||
81505946 | 1957 | /* Nothing to do if the kernel doesn't support nexthop objects */ |
7c99d51b | 1958 | if (!kernel_nexthops_supported()) |
81505946 SW |
1959 | return 0; |
1960 | ||
8d03bc50 SW |
1961 | label_buf[0] = '\0'; |
1962 | ||
1963 | memset(&req, 0, req_size); | |
f820d025 | 1964 | |
f820d025 SW |
1965 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct nhmsg)); |
1966 | req.n.nlmsg_flags = NLM_F_CREATE | NLM_F_REQUEST; | |
9a1588c4 SW |
1967 | |
1968 | if (cmd == RTM_NEWNEXTHOP) | |
1969 | req.n.nlmsg_flags |= NLM_F_REPLACE; | |
1970 | ||
f820d025 | 1971 | req.n.nlmsg_type = cmd; |
4f096395 | 1972 | req.n.nlmsg_pid = dplane_ctx_get_ns(ctx)->nls.snl.nl_pid; |
f820d025 SW |
1973 | |
1974 | req.nhm.nh_family = AF_UNSPEC; | |
fec211ad | 1975 | /* TODO: Scope? */ |
f820d025 | 1976 | |
0c8215cb SW |
1977 | uint32_t id = dplane_ctx_get_nhe_id(ctx); |
1978 | ||
1979 | if (!id) { | |
f820d025 SW |
1980 | flog_err( |
1981 | EC_ZEBRA_NHG_FIB_UPDATE, | |
1982 | "Failed trying to update a nexthop group in the kernel that does not have an ID"); | |
1983 | return -1; | |
1984 | } | |
1985 | ||
8d03bc50 | 1986 | addattr32(&req.n, req_size, NHA_ID, id); |
f820d025 SW |
1987 | |
1988 | if (cmd == RTM_NEWNEXTHOP) { | |
e22e8001 | 1989 | if (dplane_ctx_get_nhe_nh_grp_count(ctx)) |
0c8215cb | 1990 | _netlink_nexthop_build_group( |
8d03bc50 | 1991 | &req.n, req_size, id, |
e22e8001 SW |
1992 | dplane_ctx_get_nhe_nh_grp(ctx), |
1993 | dplane_ctx_get_nhe_nh_grp_count(ctx)); | |
0c8215cb SW |
1994 | else { |
1995 | const struct nexthop *nh = | |
1996 | dplane_ctx_get_nhe_ng(ctx)->nexthop; | |
1997 | afi_t afi = dplane_ctx_get_nhe_afi(ctx); | |
e8b0e420 | 1998 | |
0c8215cb | 1999 | if (afi == AFI_IP) |
565ce0d3 | 2000 | req.nhm.nh_family = AF_INET; |
0c8215cb | 2001 | else if (afi == AFI_IP6) |
565ce0d3 | 2002 | req.nhm.nh_family = AF_INET6; |
f820d025 | 2003 | |
565ce0d3 | 2004 | switch (nh->type) { |
a6e6a6d8 | 2005 | case NEXTHOP_TYPE_IPV4: |
565ce0d3 | 2006 | case NEXTHOP_TYPE_IPV4_IFINDEX: |
8d03bc50 | 2007 | addattr_l(&req.n, req_size, NHA_GATEWAY, |
565ce0d3 SW |
2008 | &nh->gate.ipv4, IPV4_MAX_BYTELEN); |
2009 | break; | |
a6e6a6d8 | 2010 | case NEXTHOP_TYPE_IPV6: |
565ce0d3 | 2011 | case NEXTHOP_TYPE_IPV6_IFINDEX: |
8d03bc50 | 2012 | addattr_l(&req.n, req_size, NHA_GATEWAY, |
565ce0d3 SW |
2013 | &nh->gate.ipv6, IPV6_MAX_BYTELEN); |
2014 | break; | |
2015 | case NEXTHOP_TYPE_BLACKHOLE: | |
8d03bc50 SW |
2016 | addattr_l(&req.n, req_size, NHA_BLACKHOLE, NULL, |
2017 | 0); | |
2018 | /* Blackhole shouldn't have anymore attributes | |
2019 | */ | |
2020 | goto nexthop_done; | |
565ce0d3 SW |
2021 | case NEXTHOP_TYPE_IFINDEX: |
2022 | /* Don't need anymore info for this */ | |
2023 | break; | |
a6e6a6d8 SW |
2024 | } |
2025 | ||
2026 | if (!nh->ifindex) { | |
565ce0d3 SW |
2027 | flog_err( |
2028 | EC_ZEBRA_NHG_FIB_UPDATE, | |
2029 | "Context received for kernel nexthop update without an interface"); | |
2030 | return -1; | |
565ce0d3 SW |
2031 | } |
2032 | ||
8d03bc50 SW |
2033 | addattr32(&req.n, req_size, NHA_OIF, nh->ifindex); |
2034 | ||
62d2ecb2 SW |
2035 | if (CHECK_FLAG(nh->flags, NEXTHOP_FLAG_ONLINK)) |
2036 | req.nhm.nh_flags |= RTNH_F_ONLINK; | |
2037 | ||
8d03bc50 SW |
2038 | num_labels = |
2039 | build_label_stack(nh->nh_label, out_lse, | |
2040 | label_buf, sizeof(label_buf)); | |
2041 | ||
2042 | if (num_labels) { | |
2043 | /* Set the BoS bit */ | |
2044 | out_lse[num_labels - 1] |= | |
2045 | htonl(1 << MPLS_LS_S_SHIFT); | |
2046 | ||
2047 | /* | |
2048 | * TODO: MPLS unsupported for now in kernel. | |
2049 | */ | |
2050 | if (req.nhm.nh_family == AF_MPLS) | |
2051 | goto nexthop_done; | |
2052 | #if 0 | |
2053 | addattr_l(&req.n, req_size, NHA_NEWDST, | |
2054 | &out_lse, | |
2055 | num_labels | |
2056 | * sizeof(mpls_lse_t)); | |
2057 | #endif | |
2058 | else { | |
2059 | struct rtattr *nest; | |
2060 | uint16_t encap = LWTUNNEL_ENCAP_MPLS; | |
2061 | ||
2062 | addattr_l(&req.n, req_size, | |
2063 | NHA_ENCAP_TYPE, &encap, | |
2064 | sizeof(uint16_t)); | |
2065 | nest = addattr_nest(&req.n, req_size, | |
2066 | NHA_ENCAP); | |
2067 | addattr_l(&req.n, req_size, | |
2068 | MPLS_IPTUNNEL_DST, &out_lse, | |
2069 | num_labels | |
2070 | * sizeof(mpls_lse_t)); | |
2071 | addattr_nest_end(&req.n, nest); | |
2072 | } | |
2073 | } | |
2074 | ||
2075 | nexthop_done: | |
2076 | if (IS_ZEBRA_DEBUG_KERNEL) { | |
2077 | char buf[NEXTHOP_STRLEN]; | |
2078 | ||
2079 | snprintfrr(buf, sizeof(buf), "%pNHv", nh); | |
2080 | zlog_debug("%s: ID (%u): %s (%u) %s ", __func__, | |
2081 | id, buf, nh->vrf_id, label_buf); | |
2082 | } | |
f820d025 SW |
2083 | } |
2084 | ||
38e40db1 | 2085 | req.nhm.nh_protocol = zebra2proto(dplane_ctx_get_nhe_type(ctx)); |
f820d025 | 2086 | |
f820d025 SW |
2087 | } else if (cmd != RTM_DELNEXTHOP) { |
2088 | flog_err( | |
2089 | EC_ZEBRA_NHG_FIB_UPDATE, | |
2090 | "Nexthop group kernel update command (%d) does not exist", | |
2091 | cmd); | |
2092 | return -1; | |
2093 | } | |
2094 | ||
0c8215cb | 2095 | _netlink_nexthop_debug(cmd, id); |
f820d025 SW |
2096 | |
2097 | return netlink_talk_info(netlink_talk_filter, &req.n, | |
2098 | dplane_ctx_get_ns(ctx), 0); | |
2099 | } | |
2100 | ||
2101 | /** | |
2102 | * kernel_nexthop_update() - Update/delete a nexthop from the kernel | |
2103 | * | |
2104 | * @ctx: Dataplane context | |
2105 | * | |
2106 | * Return: Dataplane result flag | |
2107 | */ | |
2108 | enum zebra_dplane_result kernel_nexthop_update(struct zebra_dplane_ctx *ctx) | |
2109 | { | |
98cda54a SW |
2110 | int cmd = 0; |
2111 | int ret = 0; | |
f820d025 SW |
2112 | |
2113 | switch (dplane_ctx_get_op(ctx)) { | |
2114 | case DPLANE_OP_NH_DELETE: | |
2115 | cmd = RTM_DELNEXTHOP; | |
2116 | break; | |
2117 | case DPLANE_OP_NH_INSTALL: | |
2118 | case DPLANE_OP_NH_UPDATE: | |
2119 | cmd = RTM_NEWNEXTHOP; | |
2120 | break; | |
2121 | case DPLANE_OP_ROUTE_INSTALL: | |
2122 | case DPLANE_OP_ROUTE_UPDATE: | |
2123 | case DPLANE_OP_ROUTE_DELETE: | |
2124 | case DPLANE_OP_ROUTE_NOTIFY: | |
2125 | case DPLANE_OP_LSP_INSTALL: | |
2126 | case DPLANE_OP_LSP_UPDATE: | |
2127 | case DPLANE_OP_LSP_DELETE: | |
2128 | case DPLANE_OP_LSP_NOTIFY: | |
2129 | case DPLANE_OP_PW_INSTALL: | |
2130 | case DPLANE_OP_PW_UNINSTALL: | |
2131 | case DPLANE_OP_SYS_ROUTE_ADD: | |
2132 | case DPLANE_OP_SYS_ROUTE_DELETE: | |
2133 | case DPLANE_OP_ADDR_INSTALL: | |
2134 | case DPLANE_OP_ADDR_UNINSTALL: | |
2135 | case DPLANE_OP_MAC_INSTALL: | |
2136 | case DPLANE_OP_MAC_DELETE: | |
40a2a6cd SW |
2137 | case DPLANE_OP_NEIGH_INSTALL: |
2138 | case DPLANE_OP_NEIGH_UPDATE: | |
2139 | case DPLANE_OP_NEIGH_DELETE: | |
2140 | case DPLANE_OP_VTEP_ADD: | |
2141 | case DPLANE_OP_VTEP_DELETE: | |
f820d025 SW |
2142 | case DPLANE_OP_NONE: |
2143 | flog_err( | |
2144 | EC_ZEBRA_NHG_FIB_UPDATE, | |
2145 | "Context received for kernel nexthop update with incorrect OP code (%u)", | |
2146 | dplane_ctx_get_op(ctx)); | |
2147 | return ZEBRA_DPLANE_REQUEST_FAILURE; | |
f820d025 SW |
2148 | } |
2149 | ||
2150 | ret = netlink_nexthop(cmd, ctx); | |
2151 | ||
2152 | return (ret == 0 ? ZEBRA_DPLANE_REQUEST_SUCCESS | |
2153 | : ZEBRA_DPLANE_REQUEST_FAILURE); | |
2154 | } | |
2155 | ||
7cdb1a84 MS |
2156 | /* |
2157 | * Update or delete a prefix from the kernel, | |
2158 | * using info from a dataplane context. | |
2159 | */ | |
25779064 | 2160 | enum zebra_dplane_result kernel_route_update(struct zebra_dplane_ctx *ctx) |
7cdb1a84 MS |
2161 | { |
2162 | int cmd, ret; | |
2163 | const struct prefix *p = dplane_ctx_get_dest(ctx); | |
f183e380 | 2164 | struct nexthop *nexthop; |
7cdb1a84 MS |
2165 | |
2166 | if (dplane_ctx_get_op(ctx) == DPLANE_OP_ROUTE_DELETE) { | |
2167 | cmd = RTM_DELROUTE; | |
2168 | } else if (dplane_ctx_get_op(ctx) == DPLANE_OP_ROUTE_INSTALL) { | |
2169 | cmd = RTM_NEWROUTE; | |
2170 | } else if (dplane_ctx_get_op(ctx) == DPLANE_OP_ROUTE_UPDATE) { | |
2171 | ||
2172 | if (p->family == AF_INET || v6_rr_semantics) { | |
2173 | /* Single 'replace' operation */ | |
2174 | cmd = RTM_NEWROUTE; | |
fe5f21af DS |
2175 | |
2176 | /* | |
2177 | * With route replace semantics in place | |
2178 | * for v4 routes and the new route is a system | |
2179 | * route we do not install anything. | |
2180 | * The problem here is that the new system | |
2181 | * route should cause us to withdraw from | |
2182 | * the kernel the old non-system route | |
2183 | */ | |
2184 | if (RSYSTEM_ROUTE(dplane_ctx_get_type(ctx)) && | |
2185 | !RSYSTEM_ROUTE(dplane_ctx_get_old_type(ctx))) | |
2186 | (void)netlink_route_multipath(RTM_DELROUTE, | |
2187 | ctx); | |
7cdb1a84 MS |
2188 | } else { |
2189 | /* | |
2190 | * So v6 route replace semantics are not in | |
2191 | * the kernel at this point as I understand it. | |
2192 | * so let's do a delete then an add. | |
2193 | * In the future once v6 route replace semantics | |
2194 | * are in we can figure out what to do here to | |
2195 | * allow working with old and new kernels. | |
2196 | * | |
2197 | * I'm also intentionally ignoring the failure case | |
2198 | * of the route delete. If that happens yeah we're | |
2199 | * screwed. | |
2200 | */ | |
3cdba47a DS |
2201 | if (!RSYSTEM_ROUTE(dplane_ctx_get_old_type(ctx))) |
2202 | (void)netlink_route_multipath(RTM_DELROUTE, | |
2203 | ctx); | |
7cdb1a84 MS |
2204 | cmd = RTM_NEWROUTE; |
2205 | } | |
2206 | ||
2207 | } else { | |
2208 | return ZEBRA_DPLANE_REQUEST_FAILURE; | |
2209 | } | |
2210 | ||
3cdba47a DS |
2211 | if (!RSYSTEM_ROUTE(dplane_ctx_get_type(ctx))) |
2212 | ret = netlink_route_multipath(cmd, ctx); | |
2213 | else | |
2214 | ret = 0; | |
f183e380 MS |
2215 | if ((cmd == RTM_NEWROUTE) && (ret == 0)) { |
2216 | /* Update installed nexthops to signal which have been | |
2217 | * installed. | |
2218 | */ | |
2219 | for (ALL_NEXTHOPS_PTR(dplane_ctx_get_ng(ctx), nexthop)) { | |
2220 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_RECURSIVE)) | |
2221 | continue; | |
2222 | ||
2223 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE)) { | |
2224 | SET_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB); | |
f183e380 MS |
2225 | } |
2226 | } | |
2227 | } | |
7cdb1a84 MS |
2228 | |
2229 | return (ret == 0 ? | |
2230 | ZEBRA_DPLANE_REQUEST_SUCCESS : ZEBRA_DPLANE_REQUEST_FAILURE); | |
2231 | } | |
2232 | ||
d9f5b2f5 SW |
2233 | /** |
2234 | * netlink_nexthop_process_nh() - Parse the gatway/if info from a new nexthop | |
2235 | * | |
2236 | * @tb: Netlink RTA data | |
2237 | * @family: Address family in the nhmsg | |
8c0a24c1 | 2238 | * @ifp: Interface connected - this should be NULL, we fill it in |
d9f5b2f5 SW |
2239 | * @ns_id: Namspace id |
2240 | * | |
2241 | * Return: New nexthop | |
2242 | */ | |
e22e8001 SW |
2243 | static struct nexthop netlink_nexthop_process_nh(struct rtattr **tb, |
2244 | unsigned char family, | |
2245 | struct interface **ifp, | |
2246 | ns_id_t ns_id) | |
d9f5b2f5 | 2247 | { |
e22e8001 | 2248 | struct nexthop nh = {}; |
d9f5b2f5 | 2249 | void *gate = NULL; |
8e401b25 | 2250 | enum nexthop_types_t type = 0; |
e22e8001 SW |
2251 | int if_index = 0; |
2252 | size_t sz = 0; | |
7134ba70 | 2253 | struct interface *ifp_lookup; |
d9f5b2f5 SW |
2254 | |
2255 | if_index = *(int *)RTA_DATA(tb[NHA_OIF]); | |
2256 | ||
8e401b25 | 2257 | |
d9f5b2f5 SW |
2258 | if (tb[NHA_GATEWAY]) { |
2259 | switch (family) { | |
2260 | case AF_INET: | |
8e401b25 | 2261 | type = NEXTHOP_TYPE_IPV4_IFINDEX; |
d9f5b2f5 SW |
2262 | sz = 4; |
2263 | break; | |
2264 | case AF_INET6: | |
8e401b25 | 2265 | type = NEXTHOP_TYPE_IPV6_IFINDEX; |
d9f5b2f5 SW |
2266 | sz = 16; |
2267 | break; | |
2268 | default: | |
2269 | flog_warn( | |
2270 | EC_ZEBRA_BAD_NHG_MESSAGE, | |
c4239c05 | 2271 | "Nexthop gateway with bad address family (%d) received from kernel", |
d9f5b2f5 | 2272 | family); |
e22e8001 | 2273 | return nh; |
d9f5b2f5 SW |
2274 | } |
2275 | gate = RTA_DATA(tb[NHA_GATEWAY]); | |
e22e8001 | 2276 | } else |
8e401b25 | 2277 | type = NEXTHOP_TYPE_IFINDEX; |
d9f5b2f5 | 2278 | |
8e401b25 | 2279 | if (type) |
e22e8001 | 2280 | nh.type = type; |
8e401b25 SW |
2281 | |
2282 | if (gate) | |
e22e8001 | 2283 | memcpy(&(nh.gate), gate, sz); |
8e401b25 SW |
2284 | |
2285 | if (if_index) | |
e22e8001 | 2286 | nh.ifindex = if_index; |
8e401b25 | 2287 | |
7134ba70 DS |
2288 | ifp_lookup = |
2289 | if_lookup_by_index_per_ns(zebra_ns_lookup(ns_id), nh.ifindex); | |
2290 | ||
e22e8001 | 2291 | if (ifp) |
7134ba70 DS |
2292 | *ifp = ifp_lookup; |
2293 | if (ifp_lookup) | |
2294 | nh.vrf_id = ifp_lookup->vrf_id; | |
e22e8001 | 2295 | else { |
d9f5b2f5 SW |
2296 | flog_warn( |
2297 | EC_ZEBRA_UNKNOWN_INTERFACE, | |
2298 | "%s: Unknown nexthop interface %u received, defaulting to VRF_DEFAULT", | |
e22e8001 | 2299 | __PRETTY_FUNCTION__, nh.ifindex); |
d9f5b2f5 | 2300 | |
e22e8001 | 2301 | nh.vrf_id = VRF_DEFAULT; |
d9f5b2f5 SW |
2302 | } |
2303 | ||
2304 | if (tb[NHA_ENCAP] && tb[NHA_ENCAP_TYPE]) { | |
2305 | uint16_t encap_type = *(uint16_t *)RTA_DATA(tb[NHA_ENCAP_TYPE]); | |
2306 | int num_labels = 0; | |
6e728764 | 2307 | |
d9f5b2f5 SW |
2308 | mpls_label_t labels[MPLS_MAX_LABELS] = {0}; |
2309 | ||
e22e8001 | 2310 | if (encap_type == LWTUNNEL_ENCAP_MPLS) |
d9f5b2f5 | 2311 | num_labels = parse_encap_mpls(tb[NHA_ENCAP], labels); |
d9f5b2f5 | 2312 | |
e22e8001 SW |
2313 | if (num_labels) |
2314 | nexthop_add_labels(&nh, ZEBRA_LSP_STATIC, num_labels, | |
d9f5b2f5 | 2315 | labels); |
d9f5b2f5 SW |
2316 | } |
2317 | ||
2318 | return nh; | |
2319 | } | |
2320 | ||
85f5e761 | 2321 | static int netlink_nexthop_process_group(struct rtattr **tb, |
5a935f79 | 2322 | struct nh_grp *z_grp, int z_grp_size) |
d9f5b2f5 | 2323 | { |
e22e8001 SW |
2324 | uint8_t count = 0; |
2325 | /* linux/nexthop.h group struct */ | |
d9f5b2f5 SW |
2326 | struct nexthop_grp *n_grp = NULL; |
2327 | ||
85f5e761 | 2328 | n_grp = (struct nexthop_grp *)RTA_DATA(tb[NHA_GROUP]); |
d9f5b2f5 SW |
2329 | count = (RTA_PAYLOAD(tb[NHA_GROUP]) / sizeof(*n_grp)); |
2330 | ||
2331 | if (!count || (count * sizeof(*n_grp)) != RTA_PAYLOAD(tb[NHA_GROUP])) { | |
2332 | flog_warn(EC_ZEBRA_BAD_NHG_MESSAGE, | |
2333 | "Invalid nexthop group received from the kernel"); | |
85f5e761 | 2334 | return count; |
d9f5b2f5 SW |
2335 | } |
2336 | ||
38e40db1 | 2337 | #if 0 |
d9f5b2f5 | 2338 | // TODO: Need type for something? |
85f5e761 SW |
2339 | zlog_debug("Nexthop group type: %d", |
2340 | *((uint16_t *)RTA_DATA(tb[NHA_GROUP_TYPE]))); | |
d9f5b2f5 | 2341 | |
38e40db1 | 2342 | #endif |
d9f5b2f5 | 2343 | |
5a935f79 | 2344 | for (int i = 0; ((i < count) && (i < z_grp_size)); i++) { |
e22e8001 | 2345 | z_grp[i].id = n_grp[i].id; |
df7fb580 | 2346 | z_grp[i].weight = n_grp[i].weight + 1; |
85f5e761 | 2347 | } |
d9f5b2f5 SW |
2348 | return count; |
2349 | } | |
2350 | ||
2351 | /** | |
2352 | * netlink_nexthop_change() - Read in change about nexthops from the kernel | |
2353 | * | |
2354 | * @h: Netlink message header | |
2355 | * @ns_id: Namspace id | |
2356 | * @startup: Are we reading under startup conditions? | |
2357 | * | |
2358 | * Return: Result status | |
2359 | */ | |
2360 | int netlink_nexthop_change(struct nlmsghdr *h, ns_id_t ns_id, int startup) | |
2361 | { | |
2362 | int len; | |
2363 | /* nexthop group id */ | |
2364 | uint32_t id; | |
2365 | unsigned char family; | |
38e40db1 | 2366 | int type; |
e8b0e420 | 2367 | afi_t afi = AFI_UNSPEC; |
946de1b9 | 2368 | vrf_id_t vrf_id = VRF_DEFAULT; |
8c0a24c1 | 2369 | struct interface *ifp = NULL; |
d9f5b2f5 | 2370 | struct nhmsg *nhm = NULL; |
e22e8001 SW |
2371 | struct nexthop nh = {}; |
2372 | struct nh_grp grp[MULTIPATH_NUM] = {}; | |
85f5e761 | 2373 | /* Count of nexthops in group array */ |
e22e8001 | 2374 | uint8_t grp_count = 0; |
e22e8001 | 2375 | struct rtattr *tb[NHA_MAX + 1] = {}; |
d9f5b2f5 | 2376 | |
d9f5b2f5 SW |
2377 | nhm = NLMSG_DATA(h); |
2378 | ||
88cafda7 DS |
2379 | if (ns_id) |
2380 | vrf_id = ns_id; | |
2381 | ||
d9f5b2f5 SW |
2382 | if (startup && h->nlmsg_type != RTM_NEWNEXTHOP) |
2383 | return 0; | |
2384 | ||
2385 | len = h->nlmsg_len - NLMSG_LENGTH(sizeof(struct nhmsg)); | |
2386 | if (len < 0) { | |
2387 | zlog_warn( | |
2388 | "%s: Message received from netlink is of a broken size %d %zu", | |
2389 | __PRETTY_FUNCTION__, h->nlmsg_len, | |
2390 | (size_t)NLMSG_LENGTH(sizeof(struct nhmsg))); | |
2391 | return -1; | |
2392 | } | |
2393 | ||
d9f5b2f5 SW |
2394 | netlink_parse_rtattr(tb, NHA_MAX, RTM_NHA(nhm), len); |
2395 | ||
2396 | ||
2397 | if (!tb[NHA_ID]) { | |
2398 | flog_warn( | |
2399 | EC_ZEBRA_BAD_NHG_MESSAGE, | |
2400 | "Nexthop group without an ID received from the kernel"); | |
2401 | return -1; | |
2402 | } | |
2403 | ||
2404 | /* We use the ID key'd nhg table for kernel updates */ | |
2405 | id = *((uint32_t *)RTA_DATA(tb[NHA_ID])); | |
d9f5b2f5 | 2406 | |
e8b0e420 | 2407 | family = nhm->nh_family; |
e8b0e420 SW |
2408 | afi = family2afi(family); |
2409 | ||
38e40db1 SW |
2410 | type = proto2zebra(nhm->nh_protocol, 0, true); |
2411 | ||
fdee485a SW |
2412 | if (IS_ZEBRA_DEBUG_KERNEL) |
2413 | zlog_debug("%s ID (%u) %s NS %u", | |
2414 | nl_msg_type_to_str(h->nlmsg_type), id, | |
2415 | nl_family_to_str(family), ns_id); | |
2416 | ||
2417 | ||
d9f5b2f5 SW |
2418 | if (h->nlmsg_type == RTM_NEWNEXTHOP) { |
2419 | if (tb[NHA_GROUP]) { | |
2420 | /** | |
2421 | * If this is a group message its only going to have | |
2422 | * an array of nexthop IDs associated with it | |
2423 | */ | |
5a935f79 SW |
2424 | grp_count = netlink_nexthop_process_group( |
2425 | tb, grp, array_size(grp)); | |
85f5e761 SW |
2426 | } else { |
2427 | if (tb[NHA_BLACKHOLE]) { | |
2428 | /** | |
2429 | * This nexthop is just for blackhole-ing | |
2430 | * traffic, it should not have an OIF, GATEWAY, | |
2431 | * or ENCAP | |
2432 | */ | |
e22e8001 SW |
2433 | nh.type = NEXTHOP_TYPE_BLACKHOLE; |
2434 | nh.bh_type = BLACKHOLE_UNSPEC; | |
2435 | } else if (tb[NHA_OIF]) | |
85f5e761 SW |
2436 | /** |
2437 | * This is a true new nexthop, so we need | |
2438 | * to parse the gateway and device info | |
2439 | */ | |
2440 | nh = netlink_nexthop_process_nh(tb, family, | |
2441 | &ifp, ns_id); | |
e22e8001 SW |
2442 | else { |
2443 | ||
8e401b25 SW |
2444 | flog_warn( |
2445 | EC_ZEBRA_BAD_NHG_MESSAGE, | |
2446 | "Invalid Nexthop message received from the kernel with ID (%u)", | |
2447 | id); | |
2448 | return -1; | |
2449 | } | |
e22e8001 SW |
2450 | SET_FLAG(nh.flags, NEXTHOP_FLAG_ACTIVE); |
2451 | if (nhm->nh_flags & RTNH_F_ONLINK) | |
2452 | SET_FLAG(nh.flags, NEXTHOP_FLAG_ONLINK); | |
2453 | vrf_id = nh.vrf_id; | |
d9f5b2f5 SW |
2454 | } |
2455 | ||
38e40db1 SW |
2456 | if (zebra_nhg_kernel_find(id, &nh, grp, grp_count, vrf_id, afi, |
2457 | type, startup)) | |
e22e8001 | 2458 | return -1; |
8e401b25 | 2459 | |
9a1588c4 | 2460 | } else if (h->nlmsg_type == RTM_DELNEXTHOP) |
88cafda7 | 2461 | zebra_nhg_kernel_del(id, vrf_id); |
d9f5b2f5 | 2462 | |
d9f5b2f5 SW |
2463 | return 0; |
2464 | } | |
2465 | ||
2466 | /** | |
2467 | * netlink_request_nexthop() - Request nextop information from the kernel | |
2468 | * @zns: Zebra namespace | |
2469 | * @family: AF_* netlink family | |
2470 | * @type: RTM_* route type | |
2471 | * | |
2472 | * Return: Result status | |
2473 | */ | |
2474 | static int netlink_request_nexthop(struct zebra_ns *zns, int family, int type) | |
2475 | { | |
2476 | struct { | |
2477 | struct nlmsghdr n; | |
2478 | struct nhmsg nhm; | |
2479 | } req; | |
2480 | ||
2481 | /* Form the request, specifying filter (rtattr) if needed. */ | |
2482 | memset(&req, 0, sizeof(req)); | |
2483 | req.n.nlmsg_type = type; | |
2484 | req.n.nlmsg_flags = NLM_F_ROOT | NLM_F_MATCH | NLM_F_REQUEST; | |
2485 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct nhmsg)); | |
2486 | req.nhm.nh_family = family; | |
2487 | ||
2488 | return netlink_request(&zns->netlink_cmd, &req.n); | |
2489 | } | |
2490 | ||
7d5bb02b | 2491 | |
d9f5b2f5 SW |
2492 | /** |
2493 | * netlink_nexthop_read() - Nexthop read function using netlink interface | |
2494 | * | |
2495 | * @zns: Zebra name space | |
2496 | * | |
2497 | * Return: Result status | |
2498 | * Only called at bootstrap time. | |
2499 | */ | |
2500 | int netlink_nexthop_read(struct zebra_ns *zns) | |
2501 | { | |
2502 | int ret; | |
2503 | struct zebra_dplane_info dp_info; | |
2504 | ||
2505 | zebra_dplane_info_from_zns(&dp_info, zns, true /*is_cmd*/); | |
2506 | ||
2507 | /* Get nexthop objects */ | |
2508 | ret = netlink_request_nexthop(zns, AF_UNSPEC, RTM_GETNEXTHOP); | |
2509 | if (ret < 0) | |
2510 | return ret; | |
2511 | ret = netlink_parse_info(netlink_nexthop_change, &zns->netlink_cmd, | |
2512 | &dp_info, 0, 1); | |
81505946 SW |
2513 | |
2514 | if (!ret) | |
2515 | /* If we succesfully read in nexthop objects, | |
2516 | * this kernel must support them. | |
2517 | */ | |
2518 | supports_nh = true; | |
7c99d51b MS |
2519 | |
2520 | if (IS_ZEBRA_DEBUG_KERNEL || IS_ZEBRA_DEBUG_NHG) | |
2521 | zlog_debug("Nexthop objects %ssupported on this kernel", | |
2522 | supports_nh ? "" : "not "); | |
81505946 | 2523 | |
60e0eaee | 2524 | return ret; |
d9f5b2f5 SW |
2525 | } |
2526 | ||
2527 | ||
d62a17ae | 2528 | int kernel_neigh_update(int add, int ifindex, uint32_t addr, char *lla, |
5895d33f | 2529 | int llalen, ns_id_t ns_id) |
6b8a5694 | 2530 | { |
d62a17ae | 2531 | return netlink_neigh_update(add ? RTM_NEWNEIGH : RTM_DELNEIGH, ifindex, |
5895d33f | 2532 | addr, lla, llalen, ns_id); |
6b8a5694 | 2533 | } |
718e3744 | 2534 | |
13d60d35 | 2535 | /* |
2536 | * Add remote VTEP to the flood list for this VxLAN interface (VNI). This | |
2537 | * is done by adding an FDB entry with a MAC of 00:00:00:00:00:00. | |
2538 | */ | |
0bbd4ff4 MS |
2539 | static int netlink_vxlan_flood_update_ctx(const struct zebra_dplane_ctx *ctx, |
2540 | int cmd) | |
13d60d35 | 2541 | { |
f3dbec60 | 2542 | uint8_t protocol = RTPROT_ZEBRA; |
d62a17ae | 2543 | struct { |
2544 | struct nlmsghdr n; | |
2545 | struct ndmsg ndm; | |
2546 | char buf[256]; | |
2547 | } req; | |
d7c0a89a | 2548 | uint8_t dst_mac[6] = {0x0, 0x0, 0x0, 0x0, 0x0, 0x0}; |
0bbd4ff4 | 2549 | const struct ipaddr *addr; |
d62a17ae | 2550 | |
5605ecfc | 2551 | memset(&req, 0, sizeof(req)); |
d62a17ae | 2552 | |
2553 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)); | |
2554 | req.n.nlmsg_flags = NLM_F_REQUEST; | |
2555 | if (cmd == RTM_NEWNEIGH) | |
2556 | req.n.nlmsg_flags |= (NLM_F_CREATE | NLM_F_APPEND); | |
2557 | req.n.nlmsg_type = cmd; | |
2558 | req.ndm.ndm_family = PF_BRIDGE; | |
2559 | req.ndm.ndm_state = NUD_NOARP | NUD_PERMANENT; | |
fec211ad | 2560 | req.ndm.ndm_flags |= NTF_SELF; /* Handle by "self", not "master" */ |
d62a17ae | 2561 | |
2562 | ||
f3dbec60 DS |
2563 | addattr_l(&req.n, sizeof(req), |
2564 | NDA_PROTOCOL, &protocol, sizeof(protocol)); | |
d62a17ae | 2565 | addattr_l(&req.n, sizeof(req), NDA_LLADDR, &dst_mac, 6); |
0bbd4ff4 | 2566 | req.ndm.ndm_ifindex = dplane_ctx_get_ifindex(ctx); |
13d60d35 | 2567 | |
0bbd4ff4 | 2568 | addr = dplane_ctx_neigh_get_ipaddr(ctx); |
13d60d35 | 2569 | |
0bbd4ff4 | 2570 | addattr_l(&req.n, sizeof(req), NDA_DST, &(addr->ipaddr_v4), 4); |
13d60d35 | 2571 | |
0bbd4ff4 MS |
2572 | return netlink_talk_info(netlink_talk_filter, &req.n, |
2573 | dplane_ctx_get_ns(ctx), 0); | |
13d60d35 | 2574 | } |
2575 | ||
2232a77c | 2576 | #ifndef NDA_RTA |
d62a17ae | 2577 | #define NDA_RTA(r) \ |
2578 | ((struct rtattr *)(((char *)(r)) + NLMSG_ALIGN(sizeof(struct ndmsg)))) | |
2232a77c | 2579 | #endif |
2580 | ||
2414abd3 | 2581 | static int netlink_macfdb_change(struct nlmsghdr *h, int len, ns_id_t ns_id) |
2232a77c | 2582 | { |
d62a17ae | 2583 | struct ndmsg *ndm; |
2584 | struct interface *ifp; | |
2585 | struct zebra_if *zif; | |
d62a17ae | 2586 | struct rtattr *tb[NDA_MAX + 1]; |
2587 | struct interface *br_if; | |
2588 | struct ethaddr mac; | |
2589 | vlanid_t vid = 0; | |
2590 | struct prefix vtep_ip; | |
2591 | int vid_present = 0, dst_present = 0; | |
2592 | char buf[ETHER_ADDR_STRLEN]; | |
2593 | char vid_buf[20]; | |
2594 | char dst_buf[30]; | |
a37f4598 | 2595 | bool sticky; |
d62a17ae | 2596 | |
2597 | ndm = NLMSG_DATA(h); | |
2598 | ||
2853fed6 | 2599 | /* We only process macfdb notifications if EVPN is enabled */ |
2600 | if (!is_evpn_enabled()) | |
2601 | return 0; | |
2602 | ||
d62a17ae | 2603 | /* The interface should exist. */ |
5895d33f | 2604 | ifp = if_lookup_by_index_per_ns(zebra_ns_lookup(ns_id), |
d62a17ae | 2605 | ndm->ndm_ifindex); |
28bd0652 DS |
2606 | if (!ifp || !ifp->info) { |
2607 | if (IS_ZEBRA_DEBUG_KERNEL) | |
2608 | zlog_debug("\t%s without associated interface: %u", | |
2609 | __PRETTY_FUNCTION__, ndm->ndm_ifindex); | |
d62a17ae | 2610 | return 0; |
28bd0652 | 2611 | } |
d62a17ae | 2612 | |
2613 | /* The interface should be something we're interested in. */ | |
28bd0652 DS |
2614 | if (!IS_ZEBRA_IF_BRIDGE_SLAVE(ifp)) { |
2615 | if (IS_ZEBRA_DEBUG_KERNEL) | |
2616 | zlog_debug("\t%s Not interested in %s, not a slave", | |
2617 | __PRETTY_FUNCTION__, ifp->name); | |
d62a17ae | 2618 | return 0; |
28bd0652 | 2619 | } |
d62a17ae | 2620 | |
2621 | /* Drop "permanent" entries. */ | |
28bd0652 DS |
2622 | if (ndm->ndm_state & NUD_PERMANENT) { |
2623 | if (IS_ZEBRA_DEBUG_KERNEL) | |
2624 | zlog_debug("\t%s Entry is PERMANENT, dropping", | |
2625 | __PRETTY_FUNCTION__); | |
d62a17ae | 2626 | return 0; |
28bd0652 | 2627 | } |
d62a17ae | 2628 | |
2629 | zif = (struct zebra_if *)ifp->info; | |
2630 | if ((br_if = zif->brslave_info.br_if) == NULL) { | |
28bd0652 DS |
2631 | if (IS_ZEBRA_DEBUG_KERNEL) |
2632 | zlog_debug( | |
2633 | "%s family %s IF %s(%u) brIF %u - no bridge master", | |
2634 | nl_msg_type_to_str(h->nlmsg_type), | |
2635 | nl_family_to_str(ndm->ndm_family), ifp->name, | |
2636 | ndm->ndm_ifindex, | |
2637 | zif->brslave_info.bridge_ifindex); | |
d62a17ae | 2638 | return 0; |
2639 | } | |
2640 | ||
2641 | /* Parse attributes and extract fields of interest. */ | |
2642 | memset(tb, 0, sizeof tb); | |
2643 | netlink_parse_rtattr(tb, NDA_MAX, NDA_RTA(ndm), len); | |
2644 | ||
2645 | if (!tb[NDA_LLADDR]) { | |
28bd0652 DS |
2646 | if (IS_ZEBRA_DEBUG_KERNEL) |
2647 | zlog_debug("%s family %s IF %s(%u) brIF %u - no LLADDR", | |
2648 | nl_msg_type_to_str(h->nlmsg_type), | |
2649 | nl_family_to_str(ndm->ndm_family), ifp->name, | |
2650 | ndm->ndm_ifindex, | |
2651 | zif->brslave_info.bridge_ifindex); | |
d62a17ae | 2652 | return 0; |
2653 | } | |
2654 | ||
ff8b7eb8 | 2655 | if (RTA_PAYLOAD(tb[NDA_LLADDR]) != ETH_ALEN) { |
28bd0652 DS |
2656 | if (IS_ZEBRA_DEBUG_KERNEL) |
2657 | zlog_debug( | |
2658 | "%s family %s IF %s(%u) brIF %u - LLADDR is not MAC, len %lu", | |
2659 | nl_msg_type_to_str(h->nlmsg_type), | |
2660 | nl_family_to_str(ndm->ndm_family), ifp->name, | |
2661 | ndm->ndm_ifindex, | |
2662 | zif->brslave_info.bridge_ifindex, | |
2663 | (unsigned long)RTA_PAYLOAD(tb[NDA_LLADDR])); | |
d62a17ae | 2664 | return 0; |
2665 | } | |
2666 | ||
ff8b7eb8 | 2667 | memcpy(&mac, RTA_DATA(tb[NDA_LLADDR]), ETH_ALEN); |
d62a17ae | 2668 | |
2669 | if ((NDA_VLAN <= NDA_MAX) && tb[NDA_VLAN]) { | |
2670 | vid_present = 1; | |
d7c0a89a | 2671 | vid = *(uint16_t *)RTA_DATA(tb[NDA_VLAN]); |
d62a17ae | 2672 | sprintf(vid_buf, " VLAN %u", vid); |
2673 | } | |
2674 | ||
2675 | if (tb[NDA_DST]) { | |
2676 | /* TODO: Only IPv4 supported now. */ | |
2677 | dst_present = 1; | |
2678 | vtep_ip.family = AF_INET; | |
2679 | vtep_ip.prefixlen = IPV4_MAX_BITLEN; | |
2680 | memcpy(&(vtep_ip.u.prefix4.s_addr), RTA_DATA(tb[NDA_DST]), | |
2681 | IPV4_MAX_BYTELEN); | |
2682 | sprintf(dst_buf, " dst %s", inet_ntoa(vtep_ip.u.prefix4)); | |
2683 | } | |
2684 | ||
a37f4598 | 2685 | sticky = !!(ndm->ndm_state & NUD_NOARP); |
d62a17ae | 2686 | |
2687 | if (IS_ZEBRA_DEBUG_KERNEL) | |
2688 | zlog_debug("Rx %s family %s IF %s(%u)%s %sMAC %s%s", | |
2689 | nl_msg_type_to_str(h->nlmsg_type), | |
2690 | nl_family_to_str(ndm->ndm_family), ifp->name, | |
2691 | ndm->ndm_ifindex, vid_present ? vid_buf : "", | |
2692 | sticky ? "sticky " : "", | |
2693 | prefix_mac2str(&mac, buf, sizeof(buf)), | |
2694 | dst_present ? dst_buf : ""); | |
2695 | ||
28bd0652 DS |
2696 | if (filter_vlan && vid != filter_vlan) { |
2697 | if (IS_ZEBRA_DEBUG_KERNEL) | |
2698 | zlog_debug("\tFiltered due to filter vlan: %d", | |
2699 | filter_vlan); | |
d62a17ae | 2700 | return 0; |
28bd0652 | 2701 | } |
d62a17ae | 2702 | |
2703 | /* If add or update, do accordingly if learnt on a "local" interface; if | |
2704 | * the notification is over VxLAN, this has to be related to | |
2705 | * multi-homing, | |
2706 | * so perform an implicit delete of any local entry (if it exists). | |
2707 | */ | |
2708 | if (h->nlmsg_type == RTM_NEWNEIGH) { | |
d62a17ae | 2709 | if (IS_ZEBRA_IF_VXLAN(ifp)) |
2710 | return zebra_vxlan_check_del_local_mac(ifp, br_if, &mac, | |
2711 | vid); | |
2712 | ||
2713 | return zebra_vxlan_local_mac_add_update(ifp, br_if, &mac, vid, | |
2714 | sticky); | |
2715 | } | |
2716 | ||
2717 | /* This is a delete notification. | |
2718 | * 1. For a MAC over VxLan, check if it needs to be refreshed(readded) | |
2719 | * 2. For a MAC over "local" interface, delete the mac | |
2720 | * Note: We will get notifications from both bridge driver and VxLAN | |
2721 | * driver. | |
2722 | * Ignore the notification from VxLan driver as it is also generated | |
2723 | * when mac moves from remote to local. | |
2724 | */ | |
28bd0652 DS |
2725 | if (dst_present) { |
2726 | if (IS_ZEBRA_DEBUG_KERNEL) | |
2727 | zlog_debug("\tNo Destination Present"); | |
d62a17ae | 2728 | return 0; |
28bd0652 | 2729 | } |
d62a17ae | 2730 | |
2731 | if (IS_ZEBRA_IF_VXLAN(ifp)) | |
2732 | return zebra_vxlan_check_readd_remote_mac(ifp, br_if, &mac, | |
2733 | vid); | |
2734 | ||
2735 | return zebra_vxlan_local_mac_del(ifp, br_if, &mac, vid); | |
2232a77c | 2736 | } |
2737 | ||
2414abd3 | 2738 | static int netlink_macfdb_table(struct nlmsghdr *h, ns_id_t ns_id, int startup) |
2232a77c | 2739 | { |
d62a17ae | 2740 | int len; |
2741 | struct ndmsg *ndm; | |
2232a77c | 2742 | |
d62a17ae | 2743 | if (h->nlmsg_type != RTM_NEWNEIGH) |
2744 | return 0; | |
2232a77c | 2745 | |
d62a17ae | 2746 | /* Length validity. */ |
2747 | len = h->nlmsg_len - NLMSG_LENGTH(sizeof(struct ndmsg)); | |
2748 | if (len < 0) | |
2749 | return -1; | |
2232a77c | 2750 | |
d62a17ae | 2751 | /* We are interested only in AF_BRIDGE notifications. */ |
2752 | ndm = NLMSG_DATA(h); | |
2753 | if (ndm->ndm_family != AF_BRIDGE) | |
2754 | return 0; | |
2232a77c | 2755 | |
2414abd3 | 2756 | return netlink_macfdb_change(h, len, ns_id); |
2232a77c | 2757 | } |
2758 | ||
2759 | /* Request for MAC FDB information from the kernel */ | |
85a75f1e MS |
2760 | static int netlink_request_macs(struct nlsock *netlink_cmd, int family, |
2761 | int type, ifindex_t master_ifindex) | |
2232a77c | 2762 | { |
d62a17ae | 2763 | struct { |
2764 | struct nlmsghdr n; | |
2765 | struct ifinfomsg ifm; | |
2766 | char buf[256]; | |
2767 | } req; | |
2768 | ||
2769 | /* Form the request, specifying filter (rtattr) if needed. */ | |
2770 | memset(&req, 0, sizeof(req)); | |
2771 | req.n.nlmsg_type = type; | |
718f9b0f | 2772 | req.n.nlmsg_flags = NLM_F_ROOT | NLM_F_MATCH | NLM_F_REQUEST; |
d62a17ae | 2773 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg)); |
2774 | req.ifm.ifi_family = family; | |
2775 | if (master_ifindex) | |
2776 | addattr32(&req.n, sizeof(req), IFLA_MASTER, master_ifindex); | |
2777 | ||
85a75f1e | 2778 | return netlink_request(netlink_cmd, &req.n); |
2232a77c | 2779 | } |
2780 | ||
2781 | /* | |
2782 | * MAC forwarding database read using netlink interface. This is invoked | |
2783 | * at startup. | |
2784 | */ | |
d62a17ae | 2785 | int netlink_macfdb_read(struct zebra_ns *zns) |
2232a77c | 2786 | { |
d62a17ae | 2787 | int ret; |
85a75f1e MS |
2788 | struct zebra_dplane_info dp_info; |
2789 | ||
2790 | zebra_dplane_info_from_zns(&dp_info, zns, true /*is_cmd*/); | |
d62a17ae | 2791 | |
2792 | /* Get bridge FDB table. */ | |
85a75f1e MS |
2793 | ret = netlink_request_macs(&zns->netlink_cmd, AF_BRIDGE, RTM_GETNEIGH, |
2794 | 0); | |
d62a17ae | 2795 | if (ret < 0) |
2796 | return ret; | |
2797 | /* We are reading entire table. */ | |
2798 | filter_vlan = 0; | |
85a75f1e MS |
2799 | ret = netlink_parse_info(netlink_macfdb_table, &zns->netlink_cmd, |
2800 | &dp_info, 0, 1); | |
d62a17ae | 2801 | |
2802 | return ret; | |
2232a77c | 2803 | } |
2804 | ||
2805 | /* | |
2806 | * MAC forwarding database read using netlink interface. This is for a | |
2807 | * specific bridge and matching specific access VLAN (if VLAN-aware bridge). | |
2808 | */ | |
d62a17ae | 2809 | int netlink_macfdb_read_for_bridge(struct zebra_ns *zns, struct interface *ifp, |
2810 | struct interface *br_if) | |
2232a77c | 2811 | { |
d62a17ae | 2812 | struct zebra_if *br_zif; |
2813 | struct zebra_if *zif; | |
2814 | struct zebra_l2info_vxlan *vxl; | |
85a75f1e | 2815 | struct zebra_dplane_info dp_info; |
d62a17ae | 2816 | int ret = 0; |
2817 | ||
85a75f1e | 2818 | zebra_dplane_info_from_zns(&dp_info, zns, true /*is_cmd*/); |
d62a17ae | 2819 | |
2820 | /* Save VLAN we're filtering on, if needed. */ | |
2821 | br_zif = (struct zebra_if *)br_if->info; | |
2822 | zif = (struct zebra_if *)ifp->info; | |
2823 | vxl = &zif->l2info.vxl; | |
2824 | if (IS_ZEBRA_IF_BRIDGE_VLAN_AWARE(br_zif)) | |
2825 | filter_vlan = vxl->access_vlan; | |
2826 | ||
2827 | /* Get bridge FDB table for specific bridge - we do the VLAN filtering. | |
2828 | */ | |
85a75f1e | 2829 | ret = netlink_request_macs(&zns->netlink_cmd, AF_BRIDGE, RTM_GETNEIGH, |
d62a17ae | 2830 | br_if->ifindex); |
2831 | if (ret < 0) | |
2832 | return ret; | |
85a75f1e MS |
2833 | ret = netlink_parse_info(netlink_macfdb_table, &zns->netlink_cmd, |
2834 | &dp_info, 0, 0); | |
d62a17ae | 2835 | |
2836 | /* Reset VLAN filter. */ | |
2837 | filter_vlan = 0; | |
2838 | return ret; | |
2232a77c | 2839 | } |
2840 | ||
67fb9374 CS |
2841 | |
2842 | /* Request for MAC FDB for a specific MAC address in VLAN from the kernel */ | |
2843 | static int netlink_request_specific_mac_in_bridge(struct zebra_ns *zns, | |
2844 | int family, | |
2845 | int type, | |
2846 | struct interface *br_if, | |
2847 | struct ethaddr *mac, | |
2848 | vlanid_t vid) | |
2849 | { | |
2850 | struct { | |
2851 | struct nlmsghdr n; | |
2852 | struct ndmsg ndm; | |
2853 | char buf[256]; | |
2854 | } req; | |
2855 | struct zebra_if *br_zif; | |
2856 | char buf[ETHER_ADDR_STRLEN]; | |
2857 | ||
2858 | memset(&req, 0, sizeof(req)); | |
2859 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)); | |
2860 | req.n.nlmsg_type = type; /* RTM_GETNEIGH */ | |
2861 | req.n.nlmsg_flags = NLM_F_REQUEST; | |
2862 | req.ndm.ndm_family = family; /* AF_BRIDGE */ | |
2863 | /* req.ndm.ndm_state = NUD_REACHABLE; */ | |
2864 | ||
2865 | addattr_l(&req.n, sizeof(req), NDA_LLADDR, mac, 6); | |
2866 | ||
2867 | br_zif = (struct zebra_if *)br_if->info; | |
2868 | if (IS_ZEBRA_IF_BRIDGE_VLAN_AWARE(br_zif) && vid > 0) | |
2869 | addattr16(&req.n, sizeof(req), NDA_VLAN, vid); | |
2870 | ||
2871 | addattr32(&req.n, sizeof(req), NDA_MASTER, br_if->ifindex); | |
2872 | ||
2873 | if (IS_ZEBRA_DEBUG_KERNEL) | |
2874 | zlog_debug("%s: Tx family %s IF %s(%u) MAC %s vid %u", | |
2875 | __PRETTY_FUNCTION__, | |
2876 | nl_family_to_str(req.ndm.ndm_family), br_if->name, | |
2877 | br_if->ifindex, | |
2878 | prefix_mac2str(mac, buf, sizeof(buf)), vid); | |
2879 | ||
2880 | return netlink_request(&zns->netlink_cmd, &req.n); | |
2881 | } | |
2882 | ||
2883 | int netlink_macfdb_read_specific_mac(struct zebra_ns *zns, | |
2884 | struct interface *br_if, | |
2885 | struct ethaddr *mac, vlanid_t vid) | |
2886 | { | |
2887 | int ret = 0; | |
2888 | struct zebra_dplane_info dp_info; | |
2889 | ||
2890 | zebra_dplane_info_from_zns(&dp_info, zns, true /*is_cmd*/); | |
2891 | ||
2892 | /* Get bridge FDB table for specific bridge - we do the VLAN filtering. | |
2893 | */ | |
2894 | ret = netlink_request_specific_mac_in_bridge(zns, AF_BRIDGE, | |
2895 | RTM_GETNEIGH, | |
2896 | br_if, mac, vid); | |
2897 | if (ret < 0) | |
2898 | return ret; | |
2899 | ||
2900 | ret = netlink_parse_info(netlink_macfdb_table, &zns->netlink_cmd, | |
2901 | &dp_info, 1, 0); | |
2902 | ||
2903 | return ret; | |
2904 | } | |
036d93c0 MS |
2905 | |
2906 | /* | |
2907 | * Netlink-specific handler for MAC updates using dataplane context object. | |
2908 | */ | |
2909 | static enum zebra_dplane_result | |
2910 | netlink_macfdb_update_ctx(struct zebra_dplane_ctx *ctx) | |
2232a77c | 2911 | { |
f3dbec60 | 2912 | uint8_t protocol = RTPROT_ZEBRA; |
d62a17ae | 2913 | struct { |
2914 | struct nlmsghdr n; | |
2915 | struct ndmsg ndm; | |
2916 | char buf[256]; | |
2917 | } req; | |
036d93c0 | 2918 | int ret; |
d62a17ae | 2919 | int dst_alen; |
36590076 | 2920 | int vid_present = 0; |
036d93c0 MS |
2921 | int cmd; |
2922 | struct in_addr vtep_ip; | |
2923 | vlanid_t vid; | |
2924 | ||
2925 | if (dplane_ctx_get_op(ctx) == DPLANE_OP_MAC_INSTALL) | |
2926 | cmd = RTM_NEWNEIGH; | |
2927 | else | |
2928 | cmd = RTM_DELNEIGH; | |
2929 | ||
5605ecfc | 2930 | memset(&req, 0, sizeof(req)); |
d62a17ae | 2931 | |
2932 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)); | |
2933 | req.n.nlmsg_flags = NLM_F_REQUEST; | |
2934 | if (cmd == RTM_NEWNEIGH) | |
2935 | req.n.nlmsg_flags |= (NLM_F_CREATE | NLM_F_REPLACE); | |
2936 | req.n.nlmsg_type = cmd; | |
2937 | req.ndm.ndm_family = AF_BRIDGE; | |
2938 | req.ndm.ndm_flags |= NTF_SELF | NTF_MASTER; | |
2939 | req.ndm.ndm_state = NUD_REACHABLE; | |
2940 | ||
036d93c0 | 2941 | if (dplane_ctx_mac_is_sticky(ctx)) |
d62a17ae | 2942 | req.ndm.ndm_state |= NUD_NOARP; |
2943 | else | |
2944 | req.ndm.ndm_flags |= NTF_EXT_LEARNED; | |
2945 | ||
f3dbec60 DS |
2946 | addattr_l(&req.n, sizeof(req), |
2947 | NDA_PROTOCOL, &protocol, sizeof(protocol)); | |
036d93c0 MS |
2948 | addattr_l(&req.n, sizeof(req), NDA_LLADDR, |
2949 | dplane_ctx_mac_get_addr(ctx), 6); | |
478566d6 | 2950 | req.ndm.ndm_ifindex = dplane_ctx_get_ifindex(ctx); |
036d93c0 | 2951 | |
d63c1b18 | 2952 | dst_alen = 4; // TODO: hardcoded |
036d93c0 | 2953 | vtep_ip = *(dplane_ctx_mac_get_vtep_ip(ctx)); |
d63c1b18 | 2954 | addattr_l(&req.n, sizeof(req), NDA_DST, &vtep_ip, dst_alen); |
036d93c0 | 2955 | |
478566d6 MS |
2956 | vid = dplane_ctx_mac_get_vlan(ctx); |
2957 | ||
2958 | if (vid > 0) { | |
d62a17ae | 2959 | addattr16(&req.n, sizeof(req), NDA_VLAN, vid); |
2960 | vid_present = 1; | |
d62a17ae | 2961 | } |
478566d6 MS |
2962 | addattr32(&req.n, sizeof(req), NDA_MASTER, |
2963 | dplane_ctx_mac_get_br_ifindex(ctx)); | |
d62a17ae | 2964 | |
036d93c0 MS |
2965 | if (IS_ZEBRA_DEBUG_KERNEL) { |
2966 | char ipbuf[PREFIX_STRLEN]; | |
2967 | char buf[ETHER_ADDR_STRLEN]; | |
2968 | char dst_buf[PREFIX_STRLEN + 10]; | |
478566d6 MS |
2969 | char vid_buf[20]; |
2970 | ||
2971 | if (vid_present) | |
2972 | snprintf(vid_buf, sizeof(vid_buf), " VLAN %u", vid); | |
2973 | else | |
2974 | vid_buf[0] = '\0'; | |
036d93c0 MS |
2975 | |
2976 | inet_ntop(AF_INET, &vtep_ip, ipbuf, sizeof(ipbuf)); | |
2977 | snprintf(dst_buf, sizeof(dst_buf), " dst %s", ipbuf); | |
2978 | prefix_mac2str(dplane_ctx_mac_get_addr(ctx), buf, sizeof(buf)); | |
2979 | ||
d62a17ae | 2980 | zlog_debug("Tx %s family %s IF %s(%u)%s %sMAC %s%s", |
2981 | nl_msg_type_to_str(cmd), | |
478566d6 MS |
2982 | nl_family_to_str(req.ndm.ndm_family), |
2983 | dplane_ctx_get_ifname(ctx), | |
2984 | dplane_ctx_get_ifindex(ctx), vid_buf, | |
036d93c0 MS |
2985 | dplane_ctx_mac_is_sticky(ctx) ? "sticky " : "", |
2986 | buf, dst_buf); | |
2987 | } | |
d62a17ae | 2988 | |
036d93c0 MS |
2989 | ret = netlink_talk_info(netlink_talk_filter, &req.n, |
2990 | dplane_ctx_get_ns(ctx), 0); | |
2991 | if (ret == 0) | |
2992 | return ZEBRA_DPLANE_REQUEST_SUCCESS; | |
2993 | else | |
2994 | return ZEBRA_DPLANE_REQUEST_FAILURE; | |
2232a77c | 2995 | } |
2996 | ||
f17b99ed DS |
2997 | /* |
2998 | * In the event the kernel deletes ipv4 link-local neighbor entries created for | |
2999 | * 5549 support, re-install them. | |
3000 | */ | |
3001 | static void netlink_handle_5549(struct ndmsg *ndm, struct zebra_if *zif, | |
9b036974 DS |
3002 | struct interface *ifp, struct ipaddr *ip, |
3003 | bool handle_failed) | |
f17b99ed DS |
3004 | { |
3005 | if (ndm->ndm_family != AF_INET) | |
3006 | return; | |
3007 | ||
3008 | if (!zif->v6_2_v4_ll_neigh_entry) | |
3009 | return; | |
3010 | ||
3011 | if (ipv4_ll.s_addr != ip->ip._v4_addr.s_addr) | |
3012 | return; | |
3013 | ||
9b036974 DS |
3014 | if (handle_failed && ndm->ndm_state & NUD_FAILED) { |
3015 | zlog_info("Neighbor Entry for %s has entered a failed state, not reinstalling", | |
3016 | ifp->name); | |
3017 | return; | |
3018 | } | |
3019 | ||
f17b99ed DS |
3020 | if_nbr_ipv6ll_to_ipv4ll_neigh_update(ifp, &zif->v6_2_v4_ll_addr6, true); |
3021 | } | |
3022 | ||
d62a17ae | 3023 | #define NUD_VALID \ |
3024 | (NUD_PERMANENT | NUD_NOARP | NUD_REACHABLE | NUD_PROBE | NUD_STALE \ | |
3025 | | NUD_DELAY) | |
2232a77c | 3026 | |
2414abd3 | 3027 | static int netlink_ipneigh_change(struct nlmsghdr *h, int len, ns_id_t ns_id) |
2232a77c | 3028 | { |
d62a17ae | 3029 | struct ndmsg *ndm; |
3030 | struct interface *ifp; | |
3031 | struct zebra_if *zif; | |
d62a17ae | 3032 | struct rtattr *tb[NDA_MAX + 1]; |
3033 | struct interface *link_if; | |
3034 | struct ethaddr mac; | |
3035 | struct ipaddr ip; | |
3036 | char buf[ETHER_ADDR_STRLEN]; | |
3037 | char buf2[INET6_ADDRSTRLEN]; | |
3038 | int mac_present = 0; | |
a37f4598 | 3039 | bool is_ext; |
3040 | bool is_router; | |
d62a17ae | 3041 | |
3042 | ndm = NLMSG_DATA(h); | |
3043 | ||
3044 | /* The interface should exist. */ | |
5895d33f | 3045 | ifp = if_lookup_by_index_per_ns(zebra_ns_lookup(ns_id), |
d62a17ae | 3046 | ndm->ndm_ifindex); |
2853fed6 | 3047 | if (!ifp || !ifp->info) |
d62a17ae | 3048 | return 0; |
3049 | ||
20089ae2 DS |
3050 | zif = (struct zebra_if *)ifp->info; |
3051 | ||
3052 | /* Parse attributes and extract fields of interest. */ | |
3053 | memset(tb, 0, sizeof tb); | |
3054 | netlink_parse_rtattr(tb, NDA_MAX, NDA_RTA(ndm), len); | |
3055 | ||
3056 | if (!tb[NDA_DST]) { | |
9df414fe QY |
3057 | zlog_debug("%s family %s IF %s(%u) - no DST", |
3058 | nl_msg_type_to_str(h->nlmsg_type), | |
3059 | nl_family_to_str(ndm->ndm_family), ifp->name, | |
3060 | ndm->ndm_ifindex); | |
d62a17ae | 3061 | return 0; |
20089ae2 DS |
3062 | } |
3063 | ||
3064 | memset(&ip, 0, sizeof(struct ipaddr)); | |
3065 | ip.ipa_type = (ndm->ndm_family == AF_INET) ? IPADDR_V4 : IPADDR_V6; | |
3066 | memcpy(&ip.ip.addr, RTA_DATA(tb[NDA_DST]), RTA_PAYLOAD(tb[NDA_DST])); | |
3067 | ||
f17b99ed DS |
3068 | /* if kernel deletes our rfc5549 neighbor entry, re-install it */ |
3069 | if (h->nlmsg_type == RTM_DELNEIGH && (ndm->ndm_state & NUD_PERMANENT)) { | |
9b036974 | 3070 | netlink_handle_5549(ndm, zif, ifp, &ip, false); |
28bd0652 DS |
3071 | if (IS_ZEBRA_DEBUG_KERNEL) |
3072 | zlog_debug( | |
3073 | "\tNeighbor Entry Received is a 5549 entry, finished"); | |
20089ae2 DS |
3074 | return 0; |
3075 | } | |
d62a17ae | 3076 | |
f17b99ed | 3077 | /* if kernel marks our rfc5549 neighbor entry invalid, re-install it */ |
9b036974 DS |
3078 | if (h->nlmsg_type == RTM_NEWNEIGH && !(ndm->ndm_state & NUD_VALID)) |
3079 | netlink_handle_5549(ndm, zif, ifp, &ip, true); | |
f17b99ed | 3080 | |
d62a17ae | 3081 | /* The neighbor is present on an SVI. From this, we locate the |
3082 | * underlying | |
3083 | * bridge because we're only interested in neighbors on a VxLAN bridge. | |
3084 | * The bridge is located based on the nature of the SVI: | |
3085 | * (a) In the case of a VLAN-aware bridge, the SVI is a L3 VLAN | |
3086 | * interface | |
3087 | * and is linked to the bridge | |
3088 | * (b) In the case of a VLAN-unaware bridge, the SVI is the bridge | |
3089 | * inteface | |
3090 | * itself | |
3091 | */ | |
3092 | if (IS_ZEBRA_IF_VLAN(ifp)) { | |
5895d33f | 3093 | link_if = if_lookup_by_index_per_ns(zebra_ns_lookup(ns_id), |
71349e03 | 3094 | zif->link_ifindex); |
d62a17ae | 3095 | if (!link_if) |
3096 | return 0; | |
3097 | } else if (IS_ZEBRA_IF_BRIDGE(ifp)) | |
3098 | link_if = ifp; | |
28bd0652 DS |
3099 | else { |
3100 | if (IS_ZEBRA_DEBUG_KERNEL) | |
3101 | zlog_debug( | |
3102 | "\tNeighbor Entry received is not on a VLAN or a BRIDGE, ignoring"); | |
d62a17ae | 3103 | return 0; |
28bd0652 | 3104 | } |
d62a17ae | 3105 | |
d62a17ae | 3106 | memset(&mac, 0, sizeof(struct ethaddr)); |
d62a17ae | 3107 | if (h->nlmsg_type == RTM_NEWNEIGH) { |
3108 | if (tb[NDA_LLADDR]) { | |
ff8b7eb8 | 3109 | if (RTA_PAYLOAD(tb[NDA_LLADDR]) != ETH_ALEN) { |
28bd0652 DS |
3110 | if (IS_ZEBRA_DEBUG_KERNEL) |
3111 | zlog_debug( | |
3112 | "%s family %s IF %s(%u) - LLADDR is not MAC, len %lu", | |
3113 | nl_msg_type_to_str( | |
3114 | h->nlmsg_type), | |
3115 | nl_family_to_str( | |
3116 | ndm->ndm_family), | |
3117 | ifp->name, ndm->ndm_ifindex, | |
3118 | (unsigned long)RTA_PAYLOAD( | |
3119 | tb[NDA_LLADDR])); | |
d62a17ae | 3120 | return 0; |
3121 | } | |
3122 | ||
3123 | mac_present = 1; | |
ff8b7eb8 | 3124 | memcpy(&mac, RTA_DATA(tb[NDA_LLADDR]), ETH_ALEN); |
d62a17ae | 3125 | } |
3126 | ||
a37f4598 | 3127 | is_ext = !!(ndm->ndm_flags & NTF_EXT_LEARNED); |
3128 | is_router = !!(ndm->ndm_flags & NTF_ROUTER); | |
d62a17ae | 3129 | |
3130 | if (IS_ZEBRA_DEBUG_KERNEL) | |
3131 | zlog_debug( | |
3132 | "Rx %s family %s IF %s(%u) IP %s MAC %s state 0x%x flags 0x%x", | |
3133 | nl_msg_type_to_str(h->nlmsg_type), | |
3134 | nl_family_to_str(ndm->ndm_family), ifp->name, | |
3135 | ndm->ndm_ifindex, | |
3136 | ipaddr2str(&ip, buf2, sizeof(buf2)), | |
3137 | mac_present | |
3138 | ? prefix_mac2str(&mac, buf, sizeof(buf)) | |
3139 | : "", | |
3140 | ndm->ndm_state, ndm->ndm_flags); | |
3141 | ||
3142 | /* If the neighbor state is valid for use, process as an add or | |
3143 | * update | |
3144 | * else process as a delete. Note that the delete handling may | |
3145 | * result | |
3146 | * in re-adding the neighbor if it is a valid "remote" neighbor. | |
3147 | */ | |
3148 | if (ndm->ndm_state & NUD_VALID) | |
ee69da27 | 3149 | return zebra_vxlan_handle_kernel_neigh_update( |
d62a17ae | 3150 | ifp, link_if, &ip, &mac, ndm->ndm_state, |
a37f4598 | 3151 | is_ext, is_router); |
d62a17ae | 3152 | |
ee69da27 | 3153 | return zebra_vxlan_handle_kernel_neigh_del(ifp, link_if, &ip); |
d62a17ae | 3154 | } |
3155 | ||
3156 | if (IS_ZEBRA_DEBUG_KERNEL) | |
3157 | zlog_debug("Rx %s family %s IF %s(%u) IP %s", | |
3158 | nl_msg_type_to_str(h->nlmsg_type), | |
3159 | nl_family_to_str(ndm->ndm_family), ifp->name, | |
3160 | ndm->ndm_ifindex, | |
3161 | ipaddr2str(&ip, buf2, sizeof(buf2))); | |
3162 | ||
3163 | /* Process the delete - it may result in re-adding the neighbor if it is | |
3164 | * a valid "remote" neighbor. | |
3165 | */ | |
ee69da27 | 3166 | return zebra_vxlan_handle_kernel_neigh_del(ifp, link_if, &ip); |
2232a77c | 3167 | } |
3168 | ||
2414abd3 | 3169 | static int netlink_neigh_table(struct nlmsghdr *h, ns_id_t ns_id, int startup) |
2232a77c | 3170 | { |
d62a17ae | 3171 | int len; |
3172 | struct ndmsg *ndm; | |
2232a77c | 3173 | |
d62a17ae | 3174 | if (h->nlmsg_type != RTM_NEWNEIGH) |
3175 | return 0; | |
2232a77c | 3176 | |
d62a17ae | 3177 | /* Length validity. */ |
3178 | len = h->nlmsg_len - NLMSG_LENGTH(sizeof(struct ndmsg)); | |
3179 | if (len < 0) | |
3180 | return -1; | |
2232a77c | 3181 | |
d62a17ae | 3182 | /* We are interested only in AF_INET or AF_INET6 notifications. */ |
3183 | ndm = NLMSG_DATA(h); | |
3184 | if (ndm->ndm_family != AF_INET && ndm->ndm_family != AF_INET6) | |
3185 | return 0; | |
2232a77c | 3186 | |
2414abd3 | 3187 | return netlink_neigh_change(h, len); |
2232a77c | 3188 | } |
3189 | ||
3190 | /* Request for IP neighbor information from the kernel */ | |
85a75f1e MS |
3191 | static int netlink_request_neigh(struct nlsock *netlink_cmd, int family, |
3192 | int type, ifindex_t ifindex) | |
2232a77c | 3193 | { |
d62a17ae | 3194 | struct { |
3195 | struct nlmsghdr n; | |
3196 | struct ndmsg ndm; | |
3197 | char buf[256]; | |
3198 | } req; | |
3199 | ||
3200 | /* Form the request, specifying filter (rtattr) if needed. */ | |
3201 | memset(&req, 0, sizeof(req)); | |
3202 | req.n.nlmsg_type = type; | |
718f9b0f | 3203 | req.n.nlmsg_flags = NLM_F_ROOT | NLM_F_MATCH | NLM_F_REQUEST; |
d62a17ae | 3204 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)); |
3205 | req.ndm.ndm_family = family; | |
3206 | if (ifindex) | |
3207 | addattr32(&req.n, sizeof(req), NDA_IFINDEX, ifindex); | |
3208 | ||
85a75f1e | 3209 | return netlink_request(netlink_cmd, &req.n); |
2232a77c | 3210 | } |
3211 | ||
3212 | /* | |
3213 | * IP Neighbor table read using netlink interface. This is invoked | |
3214 | * at startup. | |
3215 | */ | |
d62a17ae | 3216 | int netlink_neigh_read(struct zebra_ns *zns) |
2232a77c | 3217 | { |
d62a17ae | 3218 | int ret; |
85a75f1e MS |
3219 | struct zebra_dplane_info dp_info; |
3220 | ||
3221 | zebra_dplane_info_from_zns(&dp_info, zns, true /*is_cmd*/); | |
2232a77c | 3222 | |
d62a17ae | 3223 | /* Get IP neighbor table. */ |
85a75f1e MS |
3224 | ret = netlink_request_neigh(&zns->netlink_cmd, AF_UNSPEC, RTM_GETNEIGH, |
3225 | 0); | |
d62a17ae | 3226 | if (ret < 0) |
3227 | return ret; | |
85a75f1e MS |
3228 | ret = netlink_parse_info(netlink_neigh_table, &zns->netlink_cmd, |
3229 | &dp_info, 0, 1); | |
2232a77c | 3230 | |
d62a17ae | 3231 | return ret; |
2232a77c | 3232 | } |
3233 | ||
3234 | /* | |
3235 | * IP Neighbor table read using netlink interface. This is for a specific | |
3236 | * VLAN device. | |
3237 | */ | |
d62a17ae | 3238 | int netlink_neigh_read_for_vlan(struct zebra_ns *zns, struct interface *vlan_if) |
2232a77c | 3239 | { |
d62a17ae | 3240 | int ret = 0; |
85a75f1e MS |
3241 | struct zebra_dplane_info dp_info; |
3242 | ||
3243 | zebra_dplane_info_from_zns(&dp_info, zns, true /*is_cmd*/); | |
2232a77c | 3244 | |
85a75f1e | 3245 | ret = netlink_request_neigh(&zns->netlink_cmd, AF_UNSPEC, RTM_GETNEIGH, |
d62a17ae | 3246 | vlan_if->ifindex); |
3247 | if (ret < 0) | |
3248 | return ret; | |
85a75f1e MS |
3249 | ret = netlink_parse_info(netlink_neigh_table, &zns->netlink_cmd, |
3250 | &dp_info, 0, 0); | |
2232a77c | 3251 | |
d62a17ae | 3252 | return ret; |
2232a77c | 3253 | } |
3254 | ||
67fb9374 CS |
3255 | /* |
3256 | * Request for a specific IP in VLAN (SVI) device from IP Neighbor table, | |
3257 | * read using netlink interface. | |
3258 | */ | |
3259 | static int netlink_request_specific_neigh_in_vlan(struct zebra_ns *zns, | |
3260 | int type, struct ipaddr *ip, | |
3261 | ifindex_t ifindex) | |
3262 | { | |
3263 | struct { | |
3264 | struct nlmsghdr n; | |
3265 | struct ndmsg ndm; | |
3266 | char buf[256]; | |
3267 | } req; | |
3268 | int ipa_len; | |
3269 | ||
3270 | /* Form the request, specifying filter (rtattr) if needed. */ | |
3271 | memset(&req, 0, sizeof(req)); | |
3272 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)); | |
3273 | req.n.nlmsg_flags = NLM_F_REQUEST; | |
3274 | req.n.nlmsg_type = type; /* RTM_GETNEIGH */ | |
3275 | req.ndm.ndm_ifindex = ifindex; | |
3276 | ||
3277 | if (IS_IPADDR_V4(ip)) { | |
3278 | ipa_len = IPV4_MAX_BYTELEN; | |
3279 | req.ndm.ndm_family = AF_INET; | |
3280 | ||
3281 | } else { | |
3282 | ipa_len = IPV6_MAX_BYTELEN; | |
3283 | req.ndm.ndm_family = AF_INET6; | |
3284 | } | |
3285 | ||
3286 | addattr_l(&req.n, sizeof(req), NDA_DST, &ip->ip.addr, ipa_len); | |
3287 | ||
3288 | return netlink_request(&zns->netlink_cmd, &req.n); | |
3289 | } | |
3290 | ||
3291 | int netlink_neigh_read_specific_ip(struct ipaddr *ip, | |
3292 | struct interface *vlan_if) | |
3293 | { | |
3294 | int ret = 0; | |
3295 | struct zebra_ns *zns; | |
3296 | struct zebra_vrf *zvrf = zebra_vrf_lookup_by_id(vlan_if->vrf_id); | |
3297 | char buf[INET6_ADDRSTRLEN]; | |
3298 | struct zebra_dplane_info dp_info; | |
3299 | ||
3300 | zns = zvrf->zns; | |
3301 | ||
3302 | zebra_dplane_info_from_zns(&dp_info, zns, true /*is_cmd*/); | |
3303 | ||
3304 | if (IS_ZEBRA_DEBUG_KERNEL) | |
3305 | zlog_debug("%s: neigh request IF %s(%u) IP %s vrf_id %u", | |
3306 | __PRETTY_FUNCTION__, vlan_if->name, | |
3307 | vlan_if->ifindex, | |
3308 | ipaddr2str(ip, buf, sizeof(buf)), | |
3309 | vlan_if->vrf_id); | |
3310 | ||
3311 | ret = netlink_request_specific_neigh_in_vlan(zns, RTM_GETNEIGH, ip, | |
3312 | vlan_if->ifindex); | |
3313 | if (ret < 0) | |
3314 | return ret; | |
3315 | ||
3316 | ret = netlink_parse_info(netlink_neigh_table, &zns->netlink_cmd, | |
3317 | &dp_info, 1, 0); | |
3318 | ||
3319 | return ret; | |
3320 | } | |
3321 | ||
2414abd3 | 3322 | int netlink_neigh_change(struct nlmsghdr *h, ns_id_t ns_id) |
2232a77c | 3323 | { |
d62a17ae | 3324 | int len; |
3325 | struct ndmsg *ndm; | |
2232a77c | 3326 | |
d62a17ae | 3327 | if (!(h->nlmsg_type == RTM_NEWNEIGH || h->nlmsg_type == RTM_DELNEIGH)) |
3328 | return 0; | |
2232a77c | 3329 | |
d62a17ae | 3330 | /* Length validity. */ |
3331 | len = h->nlmsg_len - NLMSG_LENGTH(sizeof(struct ndmsg)); | |
9bdf8618 DS |
3332 | if (len < 0) { |
3333 | zlog_err("%s: Message received from netlink is of a broken size %d %zu", | |
3334 | __PRETTY_FUNCTION__, h->nlmsg_len, | |
3335 | (size_t)NLMSG_LENGTH(sizeof(struct ndmsg))); | |
d62a17ae | 3336 | return -1; |
9bdf8618 | 3337 | } |
2232a77c | 3338 | |
d62a17ae | 3339 | /* Is this a notification for the MAC FDB or IP neighbor table? */ |
3340 | ndm = NLMSG_DATA(h); | |
3341 | if (ndm->ndm_family == AF_BRIDGE) | |
2414abd3 | 3342 | return netlink_macfdb_change(h, len, ns_id); |
2232a77c | 3343 | |
d62a17ae | 3344 | if (ndm->ndm_type != RTN_UNICAST) |
3345 | return 0; | |
2232a77c | 3346 | |
d62a17ae | 3347 | if (ndm->ndm_family == AF_INET || ndm->ndm_family == AF_INET6) |
2414abd3 | 3348 | return netlink_ipneigh_change(h, len, ns_id); |
8a1b681c | 3349 | else { |
9df414fe | 3350 | flog_warn( |
e914ccbe | 3351 | EC_ZEBRA_UNKNOWN_FAMILY, |
87b5d1b0 DS |
3352 | "Invalid address family: %u received from kernel neighbor change: %s", |
3353 | ndm->ndm_family, nl_msg_type_to_str(h->nlmsg_type)); | |
8a1b681c SW |
3354 | return 0; |
3355 | } | |
2232a77c | 3356 | |
d62a17ae | 3357 | return 0; |
2232a77c | 3358 | } |
3359 | ||
931fa60c MS |
3360 | /* |
3361 | * Utility neighbor-update function, using info from dplane context. | |
3362 | */ | |
3363 | static int netlink_neigh_update_ctx(const struct zebra_dplane_ctx *ctx, | |
3364 | int cmd) | |
2232a77c | 3365 | { |
f3dbec60 | 3366 | uint8_t protocol = RTPROT_ZEBRA; |
d62a17ae | 3367 | struct { |
3368 | struct nlmsghdr n; | |
3369 | struct ndmsg ndm; | |
3370 | char buf[256]; | |
3371 | } req; | |
3372 | int ipa_len; | |
d62a17ae | 3373 | char buf[INET6_ADDRSTRLEN]; |
3374 | char buf2[ETHER_ADDR_STRLEN]; | |
931fa60c MS |
3375 | const struct ipaddr *ip; |
3376 | const struct ethaddr *mac; | |
3377 | uint8_t flags; | |
3378 | uint16_t state; | |
d62a17ae | 3379 | |
5605ecfc | 3380 | memset(&req, 0, sizeof(req)); |
d62a17ae | 3381 | |
931fa60c MS |
3382 | ip = dplane_ctx_neigh_get_ipaddr(ctx); |
3383 | mac = dplane_ctx_neigh_get_mac(ctx); | |
3384 | if (is_zero_mac(mac)) | |
3385 | mac = NULL; | |
3386 | ||
3387 | flags = neigh_flags_to_netlink(dplane_ctx_neigh_get_flags(ctx)); | |
3388 | state = neigh_state_to_netlink(dplane_ctx_neigh_get_state(ctx)); | |
3389 | ||
d62a17ae | 3390 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)); |
3391 | req.n.nlmsg_flags = NLM_F_REQUEST; | |
3392 | if (cmd == RTM_NEWNEIGH) | |
3393 | req.n.nlmsg_flags |= (NLM_F_CREATE | NLM_F_REPLACE); | |
3394 | req.n.nlmsg_type = cmd; // RTM_NEWNEIGH or RTM_DELNEIGH | |
3395 | req.ndm.ndm_family = IS_IPADDR_V4(ip) ? AF_INET : AF_INET6; | |
68e33151 | 3396 | req.ndm.ndm_state = state; |
931fa60c | 3397 | req.ndm.ndm_ifindex = dplane_ctx_get_ifindex(ctx); |
d62a17ae | 3398 | req.ndm.ndm_type = RTN_UNICAST; |
68e33151 | 3399 | req.ndm.ndm_flags = flags; |
d62a17ae | 3400 | |
f3dbec60 DS |
3401 | addattr_l(&req.n, sizeof(req), |
3402 | NDA_PROTOCOL, &protocol, sizeof(protocol)); | |
d62a17ae | 3403 | ipa_len = IS_IPADDR_V4(ip) ? IPV4_MAX_BYTELEN : IPV6_MAX_BYTELEN; |
3404 | addattr_l(&req.n, sizeof(req), NDA_DST, &ip->ip.addr, ipa_len); | |
3405 | if (mac) | |
3406 | addattr_l(&req.n, sizeof(req), NDA_LLADDR, mac, 6); | |
3407 | ||
3408 | if (IS_ZEBRA_DEBUG_KERNEL) | |
6fe2b0e6 | 3409 | zlog_debug("Tx %s family %s IF %s(%u) Neigh %s MAC %s flags 0x%x state 0x%x", |
d62a17ae | 3410 | nl_msg_type_to_str(cmd), |
931fa60c MS |
3411 | nl_family_to_str(req.ndm.ndm_family), |
3412 | dplane_ctx_get_ifname(ctx), | |
3413 | dplane_ctx_get_ifindex(ctx), | |
3414 | ipaddr2str(ip, buf, sizeof(buf)), | |
d62a17ae | 3415 | mac ? prefix_mac2str(mac, buf2, sizeof(buf2)) |
931fa60c MS |
3416 | : "null", |
3417 | flags, state); | |
d62a17ae | 3418 | |
931fa60c MS |
3419 | return netlink_talk_info(netlink_talk_filter, &req.n, |
3420 | dplane_ctx_get_ns(ctx), 0); | |
2232a77c | 3421 | } |
3422 | ||
036d93c0 MS |
3423 | /* |
3424 | * Update MAC, using dataplane context object. | |
3425 | */ | |
3426 | enum zebra_dplane_result kernel_mac_update_ctx(struct zebra_dplane_ctx *ctx) | |
2232a77c | 3427 | { |
036d93c0 | 3428 | return netlink_macfdb_update_ctx(ctx); |
2232a77c | 3429 | } |
3430 | ||
931fa60c | 3431 | enum zebra_dplane_result kernel_neigh_update_ctx(struct zebra_dplane_ctx *ctx) |
2232a77c | 3432 | { |
931fa60c | 3433 | int ret = -1; |
2232a77c | 3434 | |
931fa60c MS |
3435 | switch (dplane_ctx_get_op(ctx)) { |
3436 | case DPLANE_OP_NEIGH_INSTALL: | |
3437 | case DPLANE_OP_NEIGH_UPDATE: | |
3438 | ret = netlink_neigh_update_ctx(ctx, RTM_NEWNEIGH); | |
3439 | break; | |
3440 | case DPLANE_OP_NEIGH_DELETE: | |
3441 | ret = netlink_neigh_update_ctx(ctx, RTM_DELNEIGH); | |
3442 | break; | |
0bbd4ff4 MS |
3443 | case DPLANE_OP_VTEP_ADD: |
3444 | ret = netlink_vxlan_flood_update_ctx(ctx, RTM_NEWNEIGH); | |
3445 | break; | |
3446 | case DPLANE_OP_VTEP_DELETE: | |
3447 | ret = netlink_vxlan_flood_update_ctx(ctx, RTM_DELNEIGH); | |
3448 | break; | |
931fa60c MS |
3449 | default: |
3450 | break; | |
3451 | } | |
2232a77c | 3452 | |
931fa60c MS |
3453 | return (ret == 0 ? |
3454 | ZEBRA_DPLANE_REQUEST_SUCCESS : ZEBRA_DPLANE_REQUEST_FAILURE); | |
6fe2b0e6 CS |
3455 | } |
3456 | ||
16c628de MS |
3457 | /* |
3458 | * MPLS label forwarding table change via netlink interface, using dataplane | |
3459 | * context information. | |
3460 | */ | |
fc608372 | 3461 | int netlink_mpls_multipath(int cmd, struct zebra_dplane_ctx *ctx) |
16c628de MS |
3462 | { |
3463 | mpls_lse_t lse; | |
81793ac1 | 3464 | const zebra_nhlfe_t *nhlfe; |
16c628de MS |
3465 | struct nexthop *nexthop = NULL; |
3466 | unsigned int nexthop_num; | |
3467 | const char *routedesc; | |
3468 | int route_type; | |
3469 | ||
3470 | struct { | |
3471 | struct nlmsghdr n; | |
3472 | struct rtmsg r; | |
3473 | char buf[NL_PKT_BUF_SIZE]; | |
3474 | } req; | |
3475 | ||
3476 | memset(&req, 0, sizeof(req) - NL_PKT_BUF_SIZE); | |
3477 | ||
3478 | /* | |
3479 | * Count # nexthops so we can decide whether to use singlepath | |
3480 | * or multipath case. | |
3481 | */ | |
3482 | nexthop_num = 0; | |
3483 | for (nhlfe = dplane_ctx_get_nhlfe(ctx); nhlfe; nhlfe = nhlfe->next) { | |
3484 | nexthop = nhlfe->nexthop; | |
3485 | if (!nexthop) | |
3486 | continue; | |
3487 | if (cmd == RTM_NEWROUTE) { | |
3488 | /* Count all selected NHLFEs */ | |
3489 | if (CHECK_FLAG(nhlfe->flags, NHLFE_FLAG_SELECTED) | |
3490 | && CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE)) | |
3491 | nexthop_num++; | |
3492 | } else { /* DEL */ | |
3493 | /* Count all installed NHLFEs */ | |
3494 | if (CHECK_FLAG(nhlfe->flags, NHLFE_FLAG_INSTALLED) | |
3495 | && CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB)) | |
3496 | nexthop_num++; | |
3497 | } | |
3498 | } | |
3499 | ||
3500 | if ((nexthop_num == 0) || | |
3501 | (!dplane_ctx_get_best_nhlfe(ctx) && (cmd != RTM_DELROUTE))) | |
3502 | return 0; | |
3503 | ||
3504 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)); | |
3505 | req.n.nlmsg_flags = NLM_F_CREATE | NLM_F_REQUEST; | |
3506 | req.n.nlmsg_type = cmd; | |
3507 | req.n.nlmsg_pid = dplane_ctx_get_ns(ctx)->nls.snl.nl_pid; | |
3508 | ||
3509 | req.r.rtm_family = AF_MPLS; | |
3510 | req.r.rtm_table = RT_TABLE_MAIN; | |
3511 | req.r.rtm_dst_len = MPLS_LABEL_LEN_BITS; | |
3512 | req.r.rtm_scope = RT_SCOPE_UNIVERSE; | |
3513 | req.r.rtm_type = RTN_UNICAST; | |
3514 | ||
3515 | if (cmd == RTM_NEWROUTE) { | |
3516 | /* We do a replace to handle update. */ | |
3517 | req.n.nlmsg_flags |= NLM_F_REPLACE; | |
3518 | ||
3519 | /* set the protocol value if installing */ | |
3520 | route_type = re_type_from_lsp_type( | |
3521 | dplane_ctx_get_best_nhlfe(ctx)->type); | |
3522 | req.r.rtm_protocol = zebra2proto(route_type); | |
3523 | } | |
3524 | ||
3525 | /* Fill destination */ | |
3526 | lse = mpls_lse_encode(dplane_ctx_get_in_label(ctx), 0, 0, 1); | |
3527 | addattr_l(&req.n, sizeof(req), RTA_DST, &lse, sizeof(mpls_lse_t)); | |
3528 | ||
3529 | /* Fill nexthops (paths) based on single-path or multipath. The paths | |
3530 | * chosen depend on the operation. | |
3531 | */ | |
fc608372 | 3532 | if (nexthop_num == 1) { |
16c628de MS |
3533 | routedesc = "single-path"; |
3534 | _netlink_mpls_debug(cmd, dplane_ctx_get_in_label(ctx), | |
3535 | routedesc); | |
3536 | ||
3537 | nexthop_num = 0; | |
3538 | for (nhlfe = dplane_ctx_get_nhlfe(ctx); | |
3539 | nhlfe; nhlfe = nhlfe->next) { | |
3540 | nexthop = nhlfe->nexthop; | |
3541 | if (!nexthop) | |
3542 | continue; | |
3543 | ||
3544 | if ((cmd == RTM_NEWROUTE | |
3545 | && (CHECK_FLAG(nhlfe->flags, NHLFE_FLAG_SELECTED) | |
3546 | && CHECK_FLAG(nexthop->flags, | |
3547 | NEXTHOP_FLAG_ACTIVE))) | |
3548 | || (cmd == RTM_DELROUTE | |
3549 | && (CHECK_FLAG(nhlfe->flags, | |
3550 | NHLFE_FLAG_INSTALLED) | |
3551 | && CHECK_FLAG(nexthop->flags, | |
3552 | NEXTHOP_FLAG_FIB)))) { | |
3553 | /* Add the gateway */ | |
3554 | _netlink_mpls_build_singlepath( | |
3555 | routedesc, nhlfe, | |
3556 | &req.n, &req.r, | |
3557 | sizeof(req), cmd); | |
3558 | ||
3559 | nexthop_num++; | |
3560 | break; | |
3561 | } | |
3562 | } | |
3563 | } else { /* Multipath case */ | |
3564 | char buf[NL_PKT_BUF_SIZE]; | |
3565 | struct rtattr *rta = (void *)buf; | |
3566 | struct rtnexthop *rtnh; | |
81793ac1 | 3567 | const union g_addr *src1 = NULL; |
16c628de MS |
3568 | |
3569 | rta->rta_type = RTA_MULTIPATH; | |
3570 | rta->rta_len = RTA_LENGTH(0); | |
3571 | rtnh = RTA_DATA(rta); | |
3572 | ||
3573 | routedesc = "multipath"; | |
3574 | _netlink_mpls_debug(cmd, dplane_ctx_get_in_label(ctx), | |
3575 | routedesc); | |
3576 | ||
3577 | nexthop_num = 0; | |
3578 | for (nhlfe = dplane_ctx_get_nhlfe(ctx); | |
3579 | nhlfe; nhlfe = nhlfe->next) { | |
3580 | nexthop = nhlfe->nexthop; | |
3581 | if (!nexthop) | |
3582 | continue; | |
3583 | ||
16c628de MS |
3584 | if ((cmd == RTM_NEWROUTE |
3585 | && (CHECK_FLAG(nhlfe->flags, NHLFE_FLAG_SELECTED) | |
3586 | && CHECK_FLAG(nexthop->flags, | |
3587 | NEXTHOP_FLAG_ACTIVE))) | |
3588 | || (cmd == RTM_DELROUTE | |
3589 | && (CHECK_FLAG(nhlfe->flags, | |
3590 | NHLFE_FLAG_INSTALLED) | |
3591 | && CHECK_FLAG(nexthop->flags, | |
3592 | NEXTHOP_FLAG_FIB)))) { | |
3593 | nexthop_num++; | |
3594 | ||
3595 | /* Build the multipath */ | |
3596 | _netlink_mpls_build_multipath(routedesc, nhlfe, | |
3597 | rta, rtnh, &req.r, | |
3598 | &src1); | |
3599 | rtnh = RTNH_NEXT(rtnh); | |
3600 | } | |
3601 | } | |
3602 | ||
3603 | /* Add the multipath */ | |
3604 | if (rta->rta_len > RTA_LENGTH(0)) | |
3605 | addattr_l(&req.n, NL_PKT_BUF_SIZE, RTA_MULTIPATH, | |
3606 | RTA_DATA(rta), RTA_PAYLOAD(rta)); | |
3607 | } | |
3608 | ||
3609 | /* Talk to netlink socket. */ | |
3610 | return netlink_talk_info(netlink_talk_filter, &req.n, | |
3611 | dplane_ctx_get_ns(ctx), 0); | |
3612 | } | |
ddfeb486 | 3613 | #endif /* HAVE_NETLINK */ |