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718e3744 | 1 | /* Kernel routing table updates using netlink over GNU/Linux system. |
2 | * Copyright (C) 1997, 98, 99 Kunihiro Ishiguro | |
3 | * | |
4 | * This file is part of GNU Zebra. | |
5 | * | |
6 | * GNU Zebra is free software; you can redistribute it and/or modify it | |
7 | * under the terms of the GNU General Public License as published by the | |
8 | * Free Software Foundation; either version 2, or (at your option) any | |
9 | * later version. | |
10 | * | |
11 | * GNU Zebra is distributed in the hope that it will be useful, but | |
12 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | * General Public License for more details. | |
15 | * | |
896014f4 DL |
16 | * You should have received a copy of the GNU General Public License along |
17 | * with this program; see the file COPYING; if not, write to the Free Software | |
18 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
718e3744 | 19 | */ |
20 | ||
21 | #include <zebra.h> | |
ddfeb486 DL |
22 | |
23 | #ifdef HAVE_NETLINK | |
24 | ||
8ccc7e80 | 25 | #include <net/if_arp.h> |
ba777396 RW |
26 | #include <linux/lwtunnel.h> |
27 | #include <linux/mpls_iptunnel.h> | |
28 | #include <linux/neighbour.h> | |
29 | #include <linux/rtnetlink.h> | |
d9f5b2f5 | 30 | #include <linux/nexthop.h> |
718e3744 | 31 | |
32 | /* Hack for GNU libc version 2. */ | |
33 | #ifndef MSG_TRUNC | |
34 | #define MSG_TRUNC 0x20 | |
35 | #endif /* MSG_TRUNC */ | |
36 | ||
37 | #include "linklist.h" | |
38 | #include "if.h" | |
39 | #include "log.h" | |
40 | #include "prefix.h" | |
41 | #include "connected.h" | |
42 | #include "table.h" | |
26e2ae36 | 43 | #include "memory.h" |
4a1ab8e4 | 44 | #include "zebra_memory.h" |
718e3744 | 45 | #include "rib.h" |
e04ab74d | 46 | #include "thread.h" |
edd7c245 | 47 | #include "privs.h" |
fb018d25 | 48 | #include "nexthop.h" |
78104b9b | 49 | #include "vrf.h" |
5e6a74d8 | 50 | #include "vty.h" |
40c7bdb0 | 51 | #include "mpls.h" |
13d60d35 | 52 | #include "vxlan.h" |
8d03bc50 | 53 | #include "printfrr.h" |
718e3744 | 54 | |
bf094f69 | 55 | #include "zebra/zapi_msg.h" |
fe18ee2d | 56 | #include "zebra/zebra_ns.h" |
7c551956 | 57 | #include "zebra/zebra_vrf.h" |
6621ca86 | 58 | #include "zebra/rt.h" |
718e3744 | 59 | #include "zebra/redistribute.h" |
60 | #include "zebra/interface.h" | |
61 | #include "zebra/debug.h" | |
12f6fb97 | 62 | #include "zebra/rtadv.h" |
567b877d | 63 | #include "zebra/zebra_ptm.h" |
40c7bdb0 | 64 | #include "zebra/zebra_mpls.h" |
1fdc9eae | 65 | #include "zebra/kernel_netlink.h" |
66 | #include "zebra/rt_netlink.h" | |
d9f5b2f5 | 67 | #include "zebra/zebra_nhg.h" |
e3be0432 | 68 | #include "zebra/zebra_mroute.h" |
2232a77c | 69 | #include "zebra/zebra_vxlan.h" |
364fed6b | 70 | #include "zebra/zebra_errors.h" |
e3be0432 | 71 | |
40c7bdb0 | 72 | #ifndef AF_MPLS |
73 | #define AF_MPLS 28 | |
74 | #endif | |
75 | ||
2232a77c | 76 | static vlanid_t filter_vlan = 0; |
77 | ||
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 | ||
6a6d11a3 | 145 | static inline bool is_selfroute(int proto) |
23b1f334 | 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)) { |
6a6d11a3 | 154 | return true; |
d62a17ae | 155 | } |
156 | ||
6a6d11a3 | 157 | return false; |
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", | |
15569c58 | 216 | __func__, 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", | |
15569c58 | 283 | __func__, 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", | |
15569c58 | 442 | __func__, index); |
20822f9d SW |
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; |
6a6d11a3 | 516 | bool selfroute; |
d62a17ae | 517 | |
518 | char anyaddr[16] = {0}; | |
519 | ||
915902cb | 520 | int proto = ZEBRA_ROUTE_KERNEL; |
d62a17ae | 521 | int index = 0; |
522 | int table; | |
523 | int metric = 0; | |
d7c0a89a | 524 | uint32_t mtu = 0; |
25715c7e | 525 | uint8_t distance = 0; |
4e40b6d6 | 526 | route_tag_t tag = 0; |
fcc89a9c | 527 | uint32_t nhe_id = 0; |
d62a17ae | 528 | |
529 | void *dest = NULL; | |
530 | void *gate = NULL; | |
531 | void *prefsrc = NULL; /* IPv4 preferred source host address */ | |
532 | void *src = NULL; /* IPv6 srcdest source prefix */ | |
e655a03c | 533 | enum blackhole_type bh_type = BLACKHOLE_UNSPEC; |
d62a17ae | 534 | |
535 | rtm = NLMSG_DATA(h); | |
536 | ||
537 | if (startup && h->nlmsg_type != RTM_NEWROUTE) | |
538 | return 0; | |
e655a03c DL |
539 | switch (rtm->rtm_type) { |
540 | case RTN_UNICAST: | |
541 | break; | |
542 | case RTN_BLACKHOLE: | |
543 | bh_type = BLACKHOLE_NULL; | |
544 | break; | |
545 | case RTN_UNREACHABLE: | |
546 | bh_type = BLACKHOLE_REJECT; | |
547 | break; | |
548 | case RTN_PROHIBIT: | |
549 | bh_type = BLACKHOLE_ADMINPROHIB; | |
550 | break; | |
551 | default: | |
8c8f250b DS |
552 | if (IS_ZEBRA_DEBUG_KERNEL) |
553 | zlog_debug("Route rtm_type: %s(%d) intentionally ignoring", | |
554 | nl_rttype_to_str(rtm->rtm_type), | |
555 | rtm->rtm_type); | |
d62a17ae | 556 | return 0; |
e655a03c | 557 | } |
d62a17ae | 558 | |
559 | len = h->nlmsg_len - NLMSG_LENGTH(sizeof(struct rtmsg)); | |
9bdf8618 | 560 | if (len < 0) { |
15569c58 DA |
561 | zlog_err( |
562 | "%s: Message received from netlink is of a broken size %d %zu", | |
563 | __func__, h->nlmsg_len, | |
564 | (size_t)NLMSG_LENGTH(sizeof(struct rtmsg))); | |
d62a17ae | 565 | return -1; |
9bdf8618 | 566 | } |
d62a17ae | 567 | |
0d6f7fd6 | 568 | memset(tb, 0, sizeof(tb)); |
d62a17ae | 569 | netlink_parse_rtattr(tb, RTA_MAX, RTM_RTA(rtm), len); |
570 | ||
571 | if (rtm->rtm_flags & RTM_F_CLONED) | |
572 | return 0; | |
573 | if (rtm->rtm_protocol == RTPROT_REDIRECT) | |
574 | return 0; | |
575 | if (rtm->rtm_protocol == RTPROT_KERNEL) | |
576 | return 0; | |
577 | ||
6a6d11a3 NN |
578 | selfroute = is_selfroute(rtm->rtm_protocol); |
579 | ||
580 | if (!startup && selfroute && h->nlmsg_type == RTM_NEWROUTE) { | |
6ab5222f DS |
581 | if (IS_ZEBRA_DEBUG_KERNEL) |
582 | zlog_debug("Route type: %d Received that we think we have originated, ignoring", | |
583 | rtm->rtm_protocol); | |
d62a17ae | 584 | return 0; |
6ab5222f | 585 | } |
d62a17ae | 586 | |
587 | /* We don't care about change notifications for the MPLS table. */ | |
588 | /* TODO: Revisit this. */ | |
589 | if (rtm->rtm_family == AF_MPLS) | |
590 | return 0; | |
591 | ||
592 | /* Table corresponding to route. */ | |
593 | if (tb[RTA_TABLE]) | |
594 | table = *(int *)RTA_DATA(tb[RTA_TABLE]); | |
595 | else | |
596 | table = rtm->rtm_table; | |
597 | ||
598 | /* Map to VRF */ | |
78dd30b2 | 599 | vrf_id = vrf_lookup_by_table(table, ns_id); |
d62a17ae | 600 | if (vrf_id == VRF_DEFAULT) { |
601 | if (!is_zebra_valid_kernel_table(table) | |
602 | && !is_zebra_main_routing_table(table)) | |
603 | return 0; | |
604 | } | |
605 | ||
606 | /* Route which inserted by Zebra. */ | |
6a6d11a3 | 607 | if (selfroute) { |
d62a17ae | 608 | flags |= ZEBRA_FLAG_SELFROUTE; |
38e40db1 | 609 | proto = proto2zebra(rtm->rtm_protocol, rtm->rtm_family, false); |
915902cb | 610 | } |
d62a17ae | 611 | if (tb[RTA_OIF]) |
612 | index = *(int *)RTA_DATA(tb[RTA_OIF]); | |
613 | ||
614 | if (tb[RTA_DST]) | |
615 | dest = RTA_DATA(tb[RTA_DST]); | |
616 | else | |
617 | dest = anyaddr; | |
618 | ||
619 | if (tb[RTA_SRC]) | |
620 | src = RTA_DATA(tb[RTA_SRC]); | |
621 | else | |
622 | src = anyaddr; | |
623 | ||
624 | if (tb[RTA_PREFSRC]) | |
625 | prefsrc = RTA_DATA(tb[RTA_PREFSRC]); | |
626 | ||
627 | if (tb[RTA_GATEWAY]) | |
628 | gate = RTA_DATA(tb[RTA_GATEWAY]); | |
629 | ||
fcc89a9c SW |
630 | if (tb[RTA_NH_ID]) |
631 | nhe_id = *(uint32_t *)RTA_DATA(tb[RTA_NH_ID]); | |
632 | ||
f19435a8 DS |
633 | if (tb[RTA_PRIORITY]) |
634 | metric = *(int *)RTA_DATA(tb[RTA_PRIORITY]); | |
d62a17ae | 635 | |
4e40b6d6 KK |
636 | #if defined(SUPPORT_REALMS) |
637 | if (tb[RTA_FLOW]) | |
638 | tag = *(uint32_t *)RTA_DATA(tb[RTA_FLOW]); | |
639 | #endif | |
640 | ||
f19435a8 DS |
641 | if (tb[RTA_METRICS]) { |
642 | struct rtattr *mxrta[RTAX_MAX + 1]; | |
d62a17ae | 643 | |
0d6f7fd6 | 644 | memset(mxrta, 0, sizeof(mxrta)); |
996c9314 | 645 | netlink_parse_rtattr(mxrta, RTAX_MAX, RTA_DATA(tb[RTA_METRICS]), |
f19435a8 | 646 | RTA_PAYLOAD(tb[RTA_METRICS])); |
d62a17ae | 647 | |
f19435a8 | 648 | if (mxrta[RTAX_MTU]) |
d7c0a89a | 649 | mtu = *(uint32_t *)RTA_DATA(mxrta[RTAX_MTU]); |
d62a17ae | 650 | } |
651 | ||
652 | if (rtm->rtm_family == AF_INET) { | |
653 | p.family = AF_INET; | |
930571d2 | 654 | if (rtm->rtm_dst_len > IPV4_MAX_BITLEN) { |
e17d9b2d | 655 | zlog_err( |
75829703 | 656 | "Invalid destination prefix length: %u received from kernel route change", |
930571d2 | 657 | rtm->rtm_dst_len); |
e17d9b2d | 658 | return -1; |
930571d2 | 659 | } |
d62a17ae | 660 | memcpy(&p.u.prefix4, dest, 4); |
661 | p.prefixlen = rtm->rtm_dst_len; | |
662 | ||
1f610a1f CF |
663 | if (rtm->rtm_src_len != 0) { |
664 | char buf[PREFIX_STRLEN]; | |
9df414fe | 665 | flog_warn( |
e914ccbe | 666 | EC_ZEBRA_UNSUPPORTED_V4_SRCDEST, |
9df414fe QY |
667 | "unsupported IPv4 sourcedest route (dest %s vrf %u)", |
668 | prefix2str(&p, buf, sizeof(buf)), vrf_id); | |
1f610a1f CF |
669 | return 0; |
670 | } | |
930571d2 | 671 | |
1f610a1f CF |
672 | /* Force debug below to not display anything for source */ |
673 | src_p.prefixlen = 0; | |
d62a17ae | 674 | } else if (rtm->rtm_family == AF_INET6) { |
675 | p.family = AF_INET6; | |
930571d2 | 676 | if (rtm->rtm_dst_len > IPV6_MAX_BITLEN) { |
e17d9b2d | 677 | zlog_err( |
75829703 | 678 | "Invalid destination prefix length: %u received from kernel route change", |
930571d2 | 679 | rtm->rtm_dst_len); |
e17d9b2d | 680 | return -1; |
930571d2 | 681 | } |
d62a17ae | 682 | memcpy(&p.u.prefix6, dest, 16); |
683 | p.prefixlen = rtm->rtm_dst_len; | |
684 | ||
685 | src_p.family = AF_INET6; | |
930571d2 | 686 | if (rtm->rtm_src_len > IPV6_MAX_BITLEN) { |
e17d9b2d | 687 | zlog_err( |
75829703 | 688 | "Invalid source prefix length: %u received from kernel route change", |
930571d2 | 689 | rtm->rtm_src_len); |
e17d9b2d | 690 | return -1; |
930571d2 | 691 | } |
d62a17ae | 692 | memcpy(&src_p.prefix, src, 16); |
693 | src_p.prefixlen = rtm->rtm_src_len; | |
694 | } | |
695 | ||
25715c7e DS |
696 | /* |
697 | * For ZEBRA_ROUTE_KERNEL types: | |
698 | * | |
699 | * The metric/priority of the route received from the kernel | |
700 | * is a 32 bit number. We are going to interpret the high | |
701 | * order byte as the Admin Distance and the low order 3 bytes | |
702 | * as the metric. | |
703 | * | |
704 | * This will allow us to do two things: | |
705 | * 1) Allow the creation of kernel routes that can be | |
706 | * overridden by zebra. | |
707 | * 2) Allow the old behavior for 'most' kernel route types | |
708 | * if a user enters 'ip route ...' v4 routes get a metric | |
709 | * of 0 and v6 routes get a metric of 1024. Both of these | |
710 | * values will end up with a admin distance of 0, which | |
711 | * will cause them to win for the purposes of zebra. | |
712 | */ | |
713 | if (proto == ZEBRA_ROUTE_KERNEL) { | |
714 | distance = (metric >> 24) & 0xFF; | |
996c9314 | 715 | metric = (metric & 0x00FFFFFF); |
25715c7e DS |
716 | } |
717 | ||
d62a17ae | 718 | if (IS_ZEBRA_DEBUG_KERNEL) { |
719 | char buf[PREFIX_STRLEN]; | |
720 | char buf2[PREFIX_STRLEN]; | |
45df4e96 | 721 | zlog_debug("%s %s%s%s vrf %u(%u) metric: %d Admin Distance: %d", |
996c9314 LB |
722 | nl_msg_type_to_str(h->nlmsg_type), |
723 | prefix2str(&p, buf, sizeof(buf)), | |
724 | src_p.prefixlen ? " from " : "", | |
725 | src_p.prefixlen | |
726 | ? prefix2str(&src_p, buf2, sizeof(buf2)) | |
727 | : "", | |
45df4e96 | 728 | vrf_id, table, metric, distance); |
d62a17ae | 729 | } |
730 | ||
731 | afi_t afi = AFI_IP; | |
732 | if (rtm->rtm_family == AF_INET6) | |
733 | afi = AFI_IP6; | |
734 | ||
735 | if (h->nlmsg_type == RTM_NEWROUTE) { | |
8795f904 | 736 | |
fd36be7e | 737 | if (!tb[RTA_MULTIPATH]) { |
77a44d94 | 738 | struct nexthop nh = {0}; |
8795f904 | 739 | |
77a44d94 SW |
740 | if (!nhe_id) { |
741 | nh = parse_nexthop_unicast( | |
742 | ns_id, rtm, tb, bh_type, index, prefsrc, | |
20822f9d | 743 | gate, afi, vrf_id); |
87da6a60 | 744 | } |
4a7371e9 | 745 | rib_add(afi, SAFI_UNICAST, vrf_id, proto, 0, flags, &p, |
8032b717 SW |
746 | &src_p, &nh, nhe_id, table, metric, mtu, |
747 | distance, tag); | |
fd36be7e | 748 | } else { |
d62a17ae | 749 | /* This is a multipath route */ |
d62a17ae | 750 | struct route_entry *re; |
0eb97b86 | 751 | struct nexthop_group *ng = NULL; |
d62a17ae | 752 | struct rtnexthop *rtnh = |
753 | (struct rtnexthop *)RTA_DATA(tb[RTA_MULTIPATH]); | |
d62a17ae | 754 | |
755 | re = XCALLOC(MTYPE_RE, sizeof(struct route_entry)); | |
915902cb | 756 | re->type = proto; |
25715c7e | 757 | re->distance = distance; |
d62a17ae | 758 | re->flags = flags; |
759 | re->metric = metric; | |
760 | re->mtu = mtu; | |
761 | re->vrf_id = vrf_id; | |
762 | re->table = table; | |
98572489 | 763 | re->uptime = monotime(NULL); |
4e40b6d6 | 764 | re->tag = tag; |
bbb322f2 | 765 | re->nhe_id = nhe_id; |
3c04071d | 766 | |
20822f9d | 767 | if (!nhe_id) { |
0eb97b86 MS |
768 | uint8_t nhop_num; |
769 | ||
770 | /* Use temporary list of nexthops; parse | |
771 | * message payload's nexthops. | |
772 | */ | |
773 | ng = nexthop_group_new(); | |
774 | nhop_num = | |
20822f9d | 775 | parse_multipath_nexthops_unicast( |
0eb97b86 | 776 | ns_id, ng, rtm, rtnh, tb, |
20822f9d SW |
777 | prefsrc, vrf_id); |
778 | ||
779 | zserv_nexthop_num_warn( | |
780 | __func__, (const struct prefix *)&p, | |
781 | nhop_num); | |
0eb97b86 MS |
782 | |
783 | if (nhop_num == 0) { | |
784 | nexthop_group_delete(&ng); | |
785 | ng = NULL; | |
786 | } | |
d62a17ae | 787 | } |
788 | ||
0eb97b86 | 789 | if (nhe_id || ng) |
1f610a1f | 790 | rib_add_multipath(afi, SAFI_UNICAST, &p, |
0eb97b86 | 791 | &src_p, re, ng); |
20822f9d SW |
792 | else |
793 | XFREE(MTYPE_RE, re); | |
d62a17ae | 794 | } |
795 | } else { | |
bc541126 SW |
796 | if (nhe_id) { |
797 | rib_delete(afi, SAFI_UNICAST, vrf_id, proto, 0, flags, | |
798 | &p, &src_p, NULL, nhe_id, table, metric, | |
799 | distance, true); | |
800 | } else { | |
801 | if (!tb[RTA_MULTIPATH]) { | |
802 | struct nexthop nh; | |
760f39dc HS |
803 | |
804 | nh = parse_nexthop_unicast( | |
805 | ns_id, rtm, tb, bh_type, index, prefsrc, | |
806 | gate, afi, vrf_id); | |
bc541126 SW |
807 | rib_delete(afi, SAFI_UNICAST, vrf_id, proto, 0, |
808 | flags, &p, &src_p, &nh, 0, table, | |
809 | metric, distance, true); | |
8ba5bd58 | 810 | } else { |
bc541126 SW |
811 | /* XXX: need to compare the entire list of |
812 | * nexthops here for NLM_F_APPEND stupidity */ | |
813 | rib_delete(afi, SAFI_UNICAST, vrf_id, proto, 0, | |
814 | flags, &p, &src_p, NULL, 0, table, | |
815 | metric, distance, true); | |
8ba5bd58 | 816 | } |
d62a17ae | 817 | } |
818 | } | |
819 | ||
820 | return 0; | |
718e3744 | 821 | } |
822 | ||
e3be0432 DS |
823 | static struct mcast_route_data *mroute = NULL; |
824 | ||
2414abd3 | 825 | static int netlink_route_change_read_multicast(struct nlmsghdr *h, |
d62a17ae | 826 | ns_id_t ns_id, int startup) |
565fdc75 | 827 | { |
d62a17ae | 828 | int len; |
829 | struct rtmsg *rtm; | |
830 | struct rtattr *tb[RTA_MAX + 1]; | |
831 | struct mcast_route_data *m; | |
832 | struct mcast_route_data mr; | |
833 | int iif = 0; | |
834 | int count; | |
835 | int oif[256]; | |
836 | int oif_count = 0; | |
837 | char sbuf[40]; | |
838 | char gbuf[40]; | |
839 | char oif_list[256] = "\0"; | |
78dd30b2 | 840 | vrf_id_t vrf; |
43b5cc5e | 841 | int table; |
d62a17ae | 842 | |
843 | if (mroute) | |
844 | m = mroute; | |
845 | else { | |
846 | memset(&mr, 0, sizeof(mr)); | |
847 | m = &mr; | |
848 | } | |
849 | ||
850 | rtm = NLMSG_DATA(h); | |
851 | ||
852 | len = h->nlmsg_len - NLMSG_LENGTH(sizeof(struct rtmsg)); | |
853 | ||
0d6f7fd6 | 854 | memset(tb, 0, sizeof(tb)); |
d62a17ae | 855 | netlink_parse_rtattr(tb, RTA_MAX, RTM_RTA(rtm), len); |
90d82769 | 856 | |
43b5cc5e DS |
857 | if (tb[RTA_TABLE]) |
858 | table = *(int *)RTA_DATA(tb[RTA_TABLE]); | |
859 | else | |
860 | table = rtm->rtm_table; | |
861 | ||
78dd30b2 | 862 | vrf = vrf_lookup_by_table(table, ns_id); |
43b5cc5e | 863 | |
d62a17ae | 864 | if (tb[RTA_IIF]) |
865 | iif = *(int *)RTA_DATA(tb[RTA_IIF]); | |
866 | ||
867 | if (tb[RTA_SRC]) | |
bd8b9272 | 868 | m->sg.src = *(struct in_addr *)RTA_DATA(tb[RTA_SRC]); |
d62a17ae | 869 | |
870 | if (tb[RTA_DST]) | |
bd8b9272 | 871 | m->sg.grp = *(struct in_addr *)RTA_DATA(tb[RTA_DST]); |
d62a17ae | 872 | |
62819462 | 873 | if (tb[RTA_EXPIRES]) |
d62a17ae | 874 | m->lastused = *(unsigned long long *)RTA_DATA(tb[RTA_EXPIRES]); |
875 | ||
876 | if (tb[RTA_MULTIPATH]) { | |
877 | struct rtnexthop *rtnh = | |
878 | (struct rtnexthop *)RTA_DATA(tb[RTA_MULTIPATH]); | |
879 | ||
880 | len = RTA_PAYLOAD(tb[RTA_MULTIPATH]); | |
881 | for (;;) { | |
882 | if (len < (int)sizeof(*rtnh) || rtnh->rtnh_len > len) | |
883 | break; | |
884 | ||
885 | oif[oif_count] = rtnh->rtnh_ifindex; | |
886 | oif_count++; | |
887 | ||
3c04071d SW |
888 | if (rtnh->rtnh_len == 0) |
889 | break; | |
890 | ||
d62a17ae | 891 | len -= NLMSG_ALIGN(rtnh->rtnh_len); |
892 | rtnh = RTNH_NEXT(rtnh); | |
893 | } | |
894 | } | |
895 | ||
896 | if (IS_ZEBRA_DEBUG_KERNEL) { | |
822c9af2 SW |
897 | struct interface *ifp = NULL; |
898 | struct zebra_vrf *zvrf = NULL; | |
899 | ||
0af35d90 RW |
900 | strlcpy(sbuf, inet_ntoa(m->sg.src), sizeof(sbuf)); |
901 | strlcpy(gbuf, inet_ntoa(m->sg.grp), sizeof(gbuf)); | |
d62a17ae | 902 | for (count = 0; count < oif_count; count++) { |
903 | ifp = if_lookup_by_index(oif[count], vrf); | |
904 | char temp[256]; | |
905 | ||
5b4256ca DS |
906 | sprintf(temp, "%s(%d) ", ifp ? ifp->name : "Unknown", |
907 | oif[count]); | |
eab4a5c2 | 908 | strlcat(oif_list, temp, sizeof(oif_list)); |
d62a17ae | 909 | } |
822c9af2 | 910 | zvrf = zebra_vrf_lookup_by_id(vrf); |
d62a17ae | 911 | ifp = if_lookup_by_index(iif, vrf); |
822c9af2 SW |
912 | zlog_debug( |
913 | "MCAST VRF: %s(%d) %s (%s,%s) IIF: %s(%d) OIF: %s jiffies: %lld", | |
914 | (zvrf ? zvrf->vrf->name : "Unknown"), vrf, | |
915 | nl_msg_type_to_str(h->nlmsg_type), sbuf, gbuf, | |
916 | ifp ? ifp->name : "Unknown", iif, oif_list, | |
917 | m->lastused); | |
90d82769 | 918 | } |
d62a17ae | 919 | return 0; |
565fdc75 DS |
920 | } |
921 | ||
2414abd3 | 922 | int netlink_route_change(struct nlmsghdr *h, ns_id_t ns_id, int startup) |
565fdc75 | 923 | { |
d62a17ae | 924 | int len; |
d62a17ae | 925 | struct rtmsg *rtm; |
926 | ||
927 | rtm = NLMSG_DATA(h); | |
928 | ||
929 | if (!(h->nlmsg_type == RTM_NEWROUTE || h->nlmsg_type == RTM_DELROUTE)) { | |
930 | /* If this is not route add/delete message print warning. */ | |
9165c5f5 | 931 | zlog_debug("Kernel message: %s NS %u", |
87b5d1b0 | 932 | nl_msg_type_to_str(h->nlmsg_type), ns_id); |
d62a17ae | 933 | return 0; |
934 | } | |
935 | ||
c25e2f1a DS |
936 | if (!(rtm->rtm_family == AF_INET || |
937 | rtm->rtm_family == AF_INET6 || | |
938 | rtm->rtm_family == RTNL_FAMILY_IPMR )) { | |
9df414fe | 939 | flog_warn( |
e914ccbe | 940 | EC_ZEBRA_UNKNOWN_FAMILY, |
87b5d1b0 DS |
941 | "Invalid address family: %u received from kernel route change: %s", |
942 | rtm->rtm_family, nl_msg_type_to_str(h->nlmsg_type)); | |
8a1b681c SW |
943 | return 0; |
944 | } | |
945 | ||
d62a17ae | 946 | /* Connected route. */ |
947 | if (IS_ZEBRA_DEBUG_KERNEL) | |
78dd30b2 | 948 | zlog_debug("%s %s %s proto %s NS %u", |
d62a17ae | 949 | nl_msg_type_to_str(h->nlmsg_type), |
950 | nl_family_to_str(rtm->rtm_family), | |
951 | nl_rttype_to_str(rtm->rtm_type), | |
78dd30b2 | 952 | nl_rtproto_to_str(rtm->rtm_protocol), ns_id); |
d62a17ae | 953 | |
d62a17ae | 954 | |
955 | len = h->nlmsg_len - NLMSG_LENGTH(sizeof(struct rtmsg)); | |
9bdf8618 | 956 | if (len < 0) { |
15569c58 DA |
957 | zlog_err( |
958 | "%s: Message received from netlink is of a broken size: %d %zu", | |
959 | __func__, h->nlmsg_len, | |
960 | (size_t)NLMSG_LENGTH(sizeof(struct rtmsg))); | |
d62a17ae | 961 | return -1; |
9bdf8618 | 962 | } |
d62a17ae | 963 | |
e655a03c | 964 | if (rtm->rtm_type == RTN_MULTICAST) |
2414abd3 | 965 | netlink_route_change_read_multicast(h, ns_id, startup); |
e655a03c | 966 | else |
2414abd3 | 967 | netlink_route_change_read_unicast(h, ns_id, startup); |
d62a17ae | 968 | return 0; |
565fdc75 DS |
969 | } |
970 | ||
289602d7 | 971 | /* Request for specific route information from the kernel */ |
d62a17ae | 972 | static int netlink_request_route(struct zebra_ns *zns, int family, int type) |
289602d7 | 973 | { |
d62a17ae | 974 | struct { |
975 | struct nlmsghdr n; | |
976 | struct rtmsg rtm; | |
977 | } req; | |
978 | ||
979 | /* Form the request, specifying filter (rtattr) if needed. */ | |
980 | memset(&req, 0, sizeof(req)); | |
981 | req.n.nlmsg_type = type; | |
718f9b0f | 982 | req.n.nlmsg_flags = NLM_F_ROOT | NLM_F_MATCH | NLM_F_REQUEST; |
d62a17ae | 983 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)); |
984 | req.rtm.rtm_family = family; | |
985 | ||
986 | return netlink_request(&zns->netlink_cmd, &req.n); | |
289602d7 | 987 | } |
988 | ||
718e3744 | 989 | /* Routing table read function using netlink interface. Only called |
990 | bootstrap time. */ | |
d62a17ae | 991 | int netlink_route_read(struct zebra_ns *zns) |
718e3744 | 992 | { |
d62a17ae | 993 | int ret; |
85a75f1e MS |
994 | struct zebra_dplane_info dp_info; |
995 | ||
996 | zebra_dplane_info_from_zns(&dp_info, zns, true /*is_cmd*/); | |
d62a17ae | 997 | |
998 | /* Get IPv4 routing table. */ | |
999 | ret = netlink_request_route(zns, AF_INET, RTM_GETROUTE); | |
1000 | if (ret < 0) | |
1001 | return ret; | |
1002 | ret = netlink_parse_info(netlink_route_change_read_unicast, | |
85a75f1e | 1003 | &zns->netlink_cmd, &dp_info, 0, 1); |
d62a17ae | 1004 | if (ret < 0) |
1005 | return ret; | |
1006 | ||
1007 | /* Get IPv6 routing table. */ | |
1008 | ret = netlink_request_route(zns, AF_INET6, RTM_GETROUTE); | |
1009 | if (ret < 0) | |
1010 | return ret; | |
1011 | ret = netlink_parse_info(netlink_route_change_read_unicast, | |
85a75f1e | 1012 | &zns->netlink_cmd, &dp_info, 0, 1); |
d62a17ae | 1013 | if (ret < 0) |
1014 | return ret; | |
1015 | ||
1016 | return 0; | |
718e3744 | 1017 | } |
1018 | ||
d7c0a89a QY |
1019 | static void _netlink_route_nl_add_gateway_info(uint8_t route_family, |
1020 | uint8_t gw_family, | |
d62a17ae | 1021 | struct nlmsghdr *nlmsg, |
1022 | size_t req_size, int bytelen, | |
81793ac1 | 1023 | const struct nexthop *nexthop) |
40c7bdb0 | 1024 | { |
d62a17ae | 1025 | if (route_family == AF_MPLS) { |
1026 | struct gw_family_t gw_fam; | |
1027 | ||
1028 | gw_fam.family = gw_family; | |
1029 | if (gw_family == AF_INET) | |
1030 | memcpy(&gw_fam.gate.ipv4, &nexthop->gate.ipv4, bytelen); | |
1031 | else | |
1032 | memcpy(&gw_fam.gate.ipv6, &nexthop->gate.ipv6, bytelen); | |
1033 | addattr_l(nlmsg, req_size, RTA_VIA, &gw_fam.family, | |
1034 | bytelen + 2); | |
1035 | } else { | |
1036 | if (gw_family == AF_INET) | |
1037 | addattr_l(nlmsg, req_size, RTA_GATEWAY, | |
1038 | &nexthop->gate.ipv4, bytelen); | |
1039 | else | |
1040 | addattr_l(nlmsg, req_size, RTA_GATEWAY, | |
1041 | &nexthop->gate.ipv6, bytelen); | |
1042 | } | |
40c7bdb0 | 1043 | } |
1044 | ||
d7c0a89a QY |
1045 | static void _netlink_route_rta_add_gateway_info(uint8_t route_family, |
1046 | uint8_t gw_family, | |
d62a17ae | 1047 | struct rtattr *rta, |
1048 | struct rtnexthop *rtnh, | |
1049 | size_t req_size, int bytelen, | |
81793ac1 | 1050 | const struct nexthop *nexthop) |
40c7bdb0 | 1051 | { |
d62a17ae | 1052 | if (route_family == AF_MPLS) { |
1053 | struct gw_family_t gw_fam; | |
1054 | ||
1055 | gw_fam.family = gw_family; | |
1056 | if (gw_family == AF_INET) | |
1057 | memcpy(&gw_fam.gate.ipv4, &nexthop->gate.ipv4, bytelen); | |
1058 | else | |
1059 | memcpy(&gw_fam.gate.ipv6, &nexthop->gate.ipv6, bytelen); | |
1060 | rta_addattr_l(rta, req_size, RTA_VIA, &gw_fam.family, | |
1061 | bytelen + 2); | |
1062 | rtnh->rtnh_len += RTA_LENGTH(bytelen + 2); | |
1063 | } else { | |
1064 | if (gw_family == AF_INET) | |
1065 | rta_addattr_l(rta, req_size, RTA_GATEWAY, | |
1066 | &nexthop->gate.ipv4, bytelen); | |
1067 | else | |
1068 | rta_addattr_l(rta, req_size, RTA_GATEWAY, | |
1069 | &nexthop->gate.ipv6, bytelen); | |
1070 | rtnh->rtnh_len += sizeof(struct rtattr) + bytelen; | |
1071 | } | |
40c7bdb0 | 1072 | } |
1073 | ||
b7537db6 SW |
1074 | static int build_label_stack(struct mpls_label_stack *nh_label, |
1075 | mpls_lse_t *out_lse, char *label_buf, | |
1076 | size_t label_buf_size) | |
1077 | { | |
1078 | char label_buf1[20]; | |
1079 | int num_labels = 0; | |
1080 | ||
1081 | for (int i = 0; nh_label && i < nh_label->num_labels; i++) { | |
1082 | if (nh_label->label[i] == MPLS_LABEL_IMPLICIT_NULL) | |
1083 | continue; | |
1084 | ||
1085 | if (IS_ZEBRA_DEBUG_KERNEL) { | |
1086 | if (!num_labels) | |
1087 | sprintf(label_buf, "label %u", | |
1088 | nh_label->label[i]); | |
1089 | else { | |
1090 | sprintf(label_buf1, "/%u", nh_label->label[i]); | |
1091 | strlcat(label_buf, label_buf1, label_buf_size); | |
1092 | } | |
1093 | } | |
1094 | ||
1095 | out_lse[num_labels] = | |
1096 | mpls_lse_encode(nh_label->label[i], 0, 0, 0); | |
1097 | num_labels++; | |
1098 | } | |
1099 | ||
1100 | return num_labels; | |
1101 | } | |
1102 | ||
fa713d9e CF |
1103 | /* This function takes a nexthop as argument and adds |
1104 | * the appropriate netlink attributes to an existing | |
1105 | * netlink message. | |
1106 | * | |
1107 | * @param routedesc: Human readable description of route type | |
1108 | * (direct/recursive, single-/multipath) | |
1109 | * @param bytelen: Length of addresses in bytes. | |
1110 | * @param nexthop: Nexthop information | |
1111 | * @param nlmsg: nlmsghdr structure to fill in. | |
1112 | * @param req_size: The size allocated for the message. | |
1113 | */ | |
9a0132a5 DS |
1114 | static void _netlink_route_build_singlepath(const struct prefix *p, |
1115 | const char *routedesc, int bytelen, | |
81793ac1 | 1116 | const struct nexthop *nexthop, |
d62a17ae | 1117 | struct nlmsghdr *nlmsg, |
1118 | struct rtmsg *rtmsg, | |
1119 | size_t req_size, int cmd) | |
fa713d9e | 1120 | { |
b7537db6 | 1121 | |
d62a17ae | 1122 | mpls_lse_t out_lse[MPLS_MAX_LABELS]; |
9a62e84b | 1123 | char label_buf[256]; |
b7537db6 SW |
1124 | int num_labels = 0; |
1125 | ||
1126 | assert(nexthop); | |
d62a17ae | 1127 | |
1128 | /* | |
1129 | * label_buf is *only* currently used within debugging. | |
1130 | * As such when we assign it we are guarding it inside | |
1131 | * a debug test. If you want to change this make sure | |
1132 | * you fix this assumption | |
1133 | */ | |
1134 | label_buf[0] = '\0'; | |
d62a17ae | 1135 | |
b7537db6 SW |
1136 | num_labels = build_label_stack(nexthop->nh_label, out_lse, label_buf, |
1137 | sizeof(label_buf)); | |
fa712963 RW |
1138 | |
1139 | if (num_labels) { | |
1140 | /* Set the BoS bit */ | |
1141 | out_lse[num_labels - 1] |= htonl(1 << MPLS_LS_S_SHIFT); | |
1142 | ||
1143 | if (rtmsg->rtm_family == AF_MPLS) | |
1144 | addattr_l(nlmsg, req_size, RTA_NEWDST, &out_lse, | |
1145 | num_labels * sizeof(mpls_lse_t)); | |
1146 | else { | |
1147 | struct rtattr *nest; | |
d7c0a89a | 1148 | uint16_t encap = LWTUNNEL_ENCAP_MPLS; |
fa712963 RW |
1149 | |
1150 | addattr_l(nlmsg, req_size, RTA_ENCAP_TYPE, &encap, | |
d7c0a89a | 1151 | sizeof(uint16_t)); |
fa712963 RW |
1152 | nest = addattr_nest(nlmsg, req_size, RTA_ENCAP); |
1153 | addattr_l(nlmsg, req_size, MPLS_IPTUNNEL_DST, &out_lse, | |
1154 | num_labels * sizeof(mpls_lse_t)); | |
1155 | addattr_nest_end(nlmsg, nest); | |
66d42727 | 1156 | } |
0aabccc0 | 1157 | } |
fa713d9e | 1158 | |
d62a17ae | 1159 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ONLINK)) |
1160 | rtmsg->rtm_flags |= RTNH_F_ONLINK; | |
1161 | ||
1162 | if (rtmsg->rtm_family == AF_INET | |
1163 | && (nexthop->type == NEXTHOP_TYPE_IPV6 | |
1164 | || nexthop->type == NEXTHOP_TYPE_IPV6_IFINDEX)) { | |
1165 | rtmsg->rtm_flags |= RTNH_F_ONLINK; | |
1166 | addattr_l(nlmsg, req_size, RTA_GATEWAY, &ipv4_ll, 4); | |
1167 | addattr32(nlmsg, req_size, RTA_OIF, nexthop->ifindex); | |
1168 | ||
975a328e DA |
1169 | if (nexthop->rmap_src.ipv4.s_addr != INADDR_ANY |
1170 | && (cmd == RTM_NEWROUTE)) | |
d62a17ae | 1171 | addattr_l(nlmsg, req_size, RTA_PREFSRC, |
1172 | &nexthop->rmap_src.ipv4, bytelen); | |
975a328e DA |
1173 | else if (nexthop->src.ipv4.s_addr != INADDR_ANY |
1174 | && (cmd == RTM_NEWROUTE)) | |
d62a17ae | 1175 | addattr_l(nlmsg, req_size, RTA_PREFSRC, |
1176 | &nexthop->src.ipv4, bytelen); | |
1177 | ||
1178 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1179 | zlog_debug( | |
9a0132a5 DS |
1180 | " 5549: _netlink_route_build_singlepath() (%s): %pFX nexthop via %s %s if %u(%u)", |
1181 | routedesc, p, ipv4_ll_buf, label_buf, | |
7556c3fd | 1182 | nexthop->ifindex, nexthop->vrf_id); |
d62a17ae | 1183 | return; |
0aabccc0 DD |
1184 | } |
1185 | ||
d62a17ae | 1186 | if (nexthop->type == NEXTHOP_TYPE_IPV4 |
1187 | || nexthop->type == NEXTHOP_TYPE_IPV4_IFINDEX) { | |
1188 | /* Send deletes to the kernel without specifying the next-hop */ | |
1189 | if (cmd != RTM_DELROUTE) | |
1190 | _netlink_route_nl_add_gateway_info( | |
1191 | rtmsg->rtm_family, AF_INET, nlmsg, req_size, | |
1192 | bytelen, nexthop); | |
1193 | ||
1194 | if (cmd == RTM_NEWROUTE) { | |
975a328e | 1195 | if (nexthop->rmap_src.ipv4.s_addr != INADDR_ANY) |
d62a17ae | 1196 | addattr_l(nlmsg, req_size, RTA_PREFSRC, |
1197 | &nexthop->rmap_src.ipv4, bytelen); | |
975a328e | 1198 | else if (nexthop->src.ipv4.s_addr != INADDR_ANY) |
d62a17ae | 1199 | addattr_l(nlmsg, req_size, RTA_PREFSRC, |
1200 | &nexthop->src.ipv4, bytelen); | |
1201 | } | |
1202 | ||
1203 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1204 | zlog_debug( | |
9a0132a5 DS |
1205 | "netlink_route_multipath() (%s): %pFX nexthop via %s %s if %u(%u)", |
1206 | routedesc, p, inet_ntoa(nexthop->gate.ipv4), | |
7556c3fd | 1207 | label_buf, nexthop->ifindex, nexthop->vrf_id); |
0aabccc0 | 1208 | } |
fa713d9e | 1209 | |
d62a17ae | 1210 | if (nexthop->type == NEXTHOP_TYPE_IPV6 |
1211 | || nexthop->type == NEXTHOP_TYPE_IPV6_IFINDEX) { | |
1212 | _netlink_route_nl_add_gateway_info(rtmsg->rtm_family, AF_INET6, | |
1213 | nlmsg, req_size, bytelen, | |
1214 | nexthop); | |
1215 | ||
1216 | if (cmd == RTM_NEWROUTE) { | |
1217 | if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->rmap_src.ipv6)) | |
1218 | addattr_l(nlmsg, req_size, RTA_PREFSRC, | |
1219 | &nexthop->rmap_src.ipv6, bytelen); | |
1220 | else if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->src.ipv6)) | |
1221 | addattr_l(nlmsg, req_size, RTA_PREFSRC, | |
1222 | &nexthop->src.ipv6, bytelen); | |
1223 | } | |
fa713d9e | 1224 | |
d62a17ae | 1225 | if (IS_ZEBRA_DEBUG_KERNEL) |
1226 | zlog_debug( | |
9a0132a5 DS |
1227 | "netlink_route_multipath() (%s): %pFX nexthop via %s %s if %u(%u)", |
1228 | routedesc, p, inet6_ntoa(nexthop->gate.ipv6), | |
7556c3fd | 1229 | label_buf, nexthop->ifindex, nexthop->vrf_id); |
d62a17ae | 1230 | } |
5e210522 DS |
1231 | |
1232 | /* | |
1233 | * We have the ifindex so we should always send it | |
1234 | * This is especially useful if we are doing route | |
1235 | * leaking. | |
1236 | */ | |
1237 | if (nexthop->type != NEXTHOP_TYPE_BLACKHOLE) | |
d62a17ae | 1238 | addattr32(nlmsg, req_size, RTA_OIF, nexthop->ifindex); |
1239 | ||
275565fb | 1240 | if (nexthop->type == NEXTHOP_TYPE_IFINDEX) { |
d62a17ae | 1241 | if (cmd == RTM_NEWROUTE) { |
975a328e | 1242 | if (nexthop->rmap_src.ipv4.s_addr != INADDR_ANY) |
d62a17ae | 1243 | addattr_l(nlmsg, req_size, RTA_PREFSRC, |
1244 | &nexthop->rmap_src.ipv4, bytelen); | |
975a328e | 1245 | else if (nexthop->src.ipv4.s_addr != INADDR_ANY) |
d62a17ae | 1246 | addattr_l(nlmsg, req_size, RTA_PREFSRC, |
1247 | &nexthop->src.ipv4, bytelen); | |
1248 | } | |
fa713d9e | 1249 | |
d62a17ae | 1250 | if (IS_ZEBRA_DEBUG_KERNEL) |
1251 | zlog_debug( | |
9a0132a5 DS |
1252 | "netlink_route_multipath() (%s): %pFX nexthop via if %u(%u)", |
1253 | routedesc, p, nexthop->ifindex, | |
1254 | nexthop->vrf_id); | |
0aabccc0 | 1255 | } |
fa713d9e CF |
1256 | } |
1257 | ||
1258 | /* This function takes a nexthop as argument and | |
1259 | * appends to the given rtattr/rtnexthop pair the | |
1260 | * representation of the nexthop. If the nexthop | |
1261 | * defines a preferred source, the src parameter | |
1262 | * will be modified to point to that src, otherwise | |
1263 | * it will be kept unmodified. | |
1264 | * | |
1265 | * @param routedesc: Human readable description of route type | |
1266 | * (direct/recursive, single-/multipath) | |
1267 | * @param bytelen: Length of addresses in bytes. | |
1268 | * @param nexthop: Nexthop information | |
1269 | * @param rta: rtnetlink attribute structure | |
1270 | * @param rtnh: pointer to an rtnetlink nexthop structure | |
1271 | * @param src: pointer pointing to a location where | |
1272 | * the prefsrc should be stored. | |
1273 | */ | |
9a0132a5 DS |
1274 | static void |
1275 | _netlink_route_build_multipath(const struct prefix *p, const char *routedesc, | |
1276 | int bytelen, const struct nexthop *nexthop, | |
1277 | struct rtattr *rta, struct rtnexthop *rtnh, | |
1278 | struct rtmsg *rtmsg, 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; | |
8d27e1aa | 1340 | if (nexthop->weight) |
1341 | rtnh->rtnh_hops = nexthop->weight - 1; | |
d62a17ae | 1342 | |
975a328e | 1343 | if (nexthop->rmap_src.ipv4.s_addr != INADDR_ANY) |
d62a17ae | 1344 | *src = &nexthop->rmap_src; |
975a328e | 1345 | else if (nexthop->src.ipv4.s_addr != INADDR_ANY) |
d62a17ae | 1346 | *src = &nexthop->src; |
1347 | ||
1348 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1349 | zlog_debug( | |
9a0132a5 DS |
1350 | " 5549: netlink_route_build_multipath() (%s): %pFX nexthop via %s %s if %u", |
1351 | routedesc, p, ipv4_ll_buf, label_buf, | |
d62a17ae | 1352 | nexthop->ifindex); |
1353 | return; | |
1354 | } | |
1355 | ||
1356 | if (nexthop->type == NEXTHOP_TYPE_IPV4 | |
1357 | || nexthop->type == NEXTHOP_TYPE_IPV4_IFINDEX) { | |
1358 | _netlink_route_rta_add_gateway_info(rtmsg->rtm_family, AF_INET, | |
1359 | rta, rtnh, NL_PKT_BUF_SIZE, | |
1360 | bytelen, nexthop); | |
975a328e | 1361 | if (nexthop->rmap_src.ipv4.s_addr != INADDR_ANY) |
d62a17ae | 1362 | *src = &nexthop->rmap_src; |
975a328e | 1363 | else if (nexthop->src.ipv4.s_addr != INADDR_ANY) |
d62a17ae | 1364 | *src = &nexthop->src; |
1365 | ||
1366 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1367 | zlog_debug( | |
9a0132a5 DS |
1368 | "netlink_route_multipath() (%s): %pFX nexthop via %s %s if %u", |
1369 | routedesc, p, inet_ntoa(nexthop->gate.ipv4), | |
d62a17ae | 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( | |
9a0132a5 DS |
1385 | "netlink_route_multipath() (%s): %pFX nexthop via %s %s if %u", |
1386 | routedesc, p, inet6_ntoa(nexthop->gate.ipv6), | |
d62a17ae | 1387 | label_buf, nexthop->ifindex); |
1388 | } | |
5e210522 DS |
1389 | |
1390 | /* | |
1391 | * We have figured out the ifindex so we should always send it | |
1392 | * This is especially useful if we are doing route | |
1393 | * leaking. | |
1394 | */ | |
1395 | if (nexthop->type != NEXTHOP_TYPE_BLACKHOLE) | |
1396 | rtnh->rtnh_ifindex = nexthop->ifindex; | |
1397 | ||
d62a17ae | 1398 | /* ifindex */ |
275565fb | 1399 | if (nexthop->type == NEXTHOP_TYPE_IFINDEX) { |
975a328e | 1400 | if (nexthop->rmap_src.ipv4.s_addr != INADDR_ANY) |
d62a17ae | 1401 | *src = &nexthop->rmap_src; |
975a328e | 1402 | else if (nexthop->src.ipv4.s_addr != INADDR_ANY) |
d62a17ae | 1403 | *src = &nexthop->src; |
1404 | ||
1405 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1406 | zlog_debug( | |
9a0132a5 DS |
1407 | "netlink_route_multipath() (%s): %pFX nexthop via if %u", |
1408 | routedesc, p, nexthop->ifindex); | |
d62a17ae | 1409 | } |
df7fb580 DS |
1410 | |
1411 | if (nexthop->weight) | |
1412 | rtnh->rtnh_hops = nexthop->weight - 1; | |
fa713d9e CF |
1413 | } |
1414 | ||
9a0132a5 DS |
1415 | static inline void _netlink_mpls_build_singlepath(const struct prefix *p, |
1416 | const char *routedesc, | |
81793ac1 | 1417 | const zebra_nhlfe_t *nhlfe, |
d62a17ae | 1418 | struct nlmsghdr *nlmsg, |
1419 | struct rtmsg *rtmsg, | |
1420 | size_t req_size, int cmd) | |
40c7bdb0 | 1421 | { |
d62a17ae | 1422 | int bytelen; |
d7c0a89a | 1423 | uint8_t family; |
40c7bdb0 | 1424 | |
d62a17ae | 1425 | family = NHLFE_FAMILY(nhlfe); |
1426 | bytelen = (family == AF_INET ? 4 : 16); | |
9a0132a5 | 1427 | _netlink_route_build_singlepath(p, routedesc, bytelen, nhlfe->nexthop, |
d62a17ae | 1428 | nlmsg, rtmsg, req_size, cmd); |
40c7bdb0 | 1429 | } |
1430 | ||
1431 | ||
1432 | static inline void | |
9a0132a5 DS |
1433 | _netlink_mpls_build_multipath(const struct prefix *p, const char *routedesc, |
1434 | const zebra_nhlfe_t *nhlfe, struct rtattr *rta, | |
1435 | struct rtnexthop *rtnh, struct rtmsg *rtmsg, | |
1436 | 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); | |
9a0132a5 DS |
1443 | _netlink_route_build_multipath(p, routedesc, bytelen, nhlfe->nexthop, |
1444 | rta, 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 | ||
762288f5 SW |
1518 | static bool nexthop_set_src(const struct nexthop *nexthop, int family, |
1519 | union g_addr *src) | |
1520 | { | |
1521 | if (family == AF_INET) { | |
1522 | if (nexthop->rmap_src.ipv4.s_addr != INADDR_ANY) { | |
1523 | src->ipv4 = nexthop->rmap_src.ipv4; | |
1524 | return true; | |
1525 | } else if (nexthop->src.ipv4.s_addr != INADDR_ANY) { | |
1526 | src->ipv4 = nexthop->src.ipv4; | |
1527 | return true; | |
1528 | } | |
1529 | } else if (family == AF_INET6) { | |
1530 | if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->rmap_src.ipv6)) { | |
1531 | src->ipv6 = nexthop->rmap_src.ipv6; | |
1532 | return true; | |
1533 | } else if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->src.ipv6)) { | |
1534 | src->ipv6 = nexthop->src.ipv6; | |
1535 | return true; | |
1536 | } | |
1537 | } | |
1538 | ||
1539 | return false; | |
1540 | } | |
1541 | ||
7cdb1a84 MS |
1542 | /* |
1543 | * Routing table change via netlink interface, using a dataplane context object | |
1544 | */ | |
25779064 | 1545 | static int netlink_route_multipath(int cmd, struct zebra_dplane_ctx *ctx) |
7cdb1a84 MS |
1546 | { |
1547 | int bytelen; | |
7cdb1a84 MS |
1548 | struct nexthop *nexthop = NULL; |
1549 | unsigned int nexthop_num; | |
1550 | int family; | |
1551 | const char *routedesc; | |
762288f5 | 1552 | bool setsrc = false; |
7cdb1a84 MS |
1553 | union g_addr src; |
1554 | const struct prefix *p, *src_p; | |
1555 | uint32_t table_id; | |
1556 | ||
1557 | struct { | |
1558 | struct nlmsghdr n; | |
1559 | struct rtmsg r; | |
1560 | char buf[NL_PKT_BUF_SIZE]; | |
1561 | } req; | |
1562 | ||
1563 | p = dplane_ctx_get_dest(ctx); | |
1564 | src_p = dplane_ctx_get_src(ctx); | |
1565 | ||
1566 | family = PREFIX_FAMILY(p); | |
1567 | ||
5709131c | 1568 | memset(&req, 0, sizeof(req) - NL_PKT_BUF_SIZE); |
7cdb1a84 MS |
1569 | |
1570 | bytelen = (family == AF_INET ? 4 : 16); | |
1571 | ||
1572 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)); | |
1573 | req.n.nlmsg_flags = NLM_F_CREATE | NLM_F_REQUEST; | |
1574 | ||
334734a8 DS |
1575 | if ((cmd == RTM_NEWROUTE) && |
1576 | ((p->family == AF_INET) || v6_rr_semantics)) | |
1577 | req.n.nlmsg_flags |= NLM_F_REPLACE; | |
7cdb1a84 MS |
1578 | |
1579 | req.n.nlmsg_type = cmd; | |
1580 | ||
1581 | req.n.nlmsg_pid = dplane_ctx_get_ns(ctx)->nls.snl.nl_pid; | |
1582 | ||
1583 | req.r.rtm_family = family; | |
1584 | req.r.rtm_dst_len = p->prefixlen; | |
1585 | req.r.rtm_src_len = src_p ? src_p->prefixlen : 0; | |
1586 | req.r.rtm_scope = RT_SCOPE_UNIVERSE; | |
1587 | ||
5709131c | 1588 | if (cmd == RTM_DELROUTE) |
7cdb1a84 | 1589 | req.r.rtm_protocol = zebra2proto(dplane_ctx_get_old_type(ctx)); |
5709131c | 1590 | else |
7cdb1a84 | 1591 | req.r.rtm_protocol = zebra2proto(dplane_ctx_get_type(ctx)); |
7cdb1a84 MS |
1592 | |
1593 | /* | |
1594 | * blackhole routes are not RTN_UNICAST, they are | |
1595 | * RTN_ BLACKHOLE|UNREACHABLE|PROHIBIT | |
1596 | * so setting this value as a RTN_UNICAST would | |
1597 | * cause the route lookup of just the prefix | |
1598 | * to fail. So no need to specify this for | |
1599 | * the RTM_DELROUTE case | |
1600 | */ | |
1601 | if (cmd != RTM_DELROUTE) | |
1602 | req.r.rtm_type = RTN_UNICAST; | |
1603 | ||
5709131c | 1604 | addattr_l(&req.n, sizeof(req), RTA_DST, &p->u.prefix, bytelen); |
7cdb1a84 | 1605 | if (src_p) |
5709131c | 1606 | addattr_l(&req.n, sizeof(req), RTA_SRC, &src_p->u.prefix, |
7cdb1a84 MS |
1607 | bytelen); |
1608 | ||
1609 | /* Metric. */ | |
1610 | /* Hardcode the metric for all routes coming from zebra. Metric isn't | |
1611 | * used | |
1612 | * either by the kernel or by zebra. Its purely for calculating best | |
1613 | * path(s) | |
1614 | * by the routing protocol and for communicating with protocol peers. | |
1615 | */ | |
5709131c | 1616 | addattr32(&req.n, sizeof(req), RTA_PRIORITY, NL_DEFAULT_ROUTE_METRIC); |
7cdb1a84 MS |
1617 | |
1618 | #if defined(SUPPORT_REALMS) | |
1619 | { | |
1620 | route_tag_t tag; | |
1621 | ||
5709131c | 1622 | if (cmd == RTM_DELROUTE) |
7cdb1a84 | 1623 | tag = dplane_ctx_get_old_tag(ctx); |
5709131c | 1624 | else |
7cdb1a84 | 1625 | tag = dplane_ctx_get_tag(ctx); |
7cdb1a84 MS |
1626 | |
1627 | if (tag > 0 && tag <= 255) | |
5709131c | 1628 | addattr32(&req.n, sizeof(req), RTA_FLOW, tag); |
7cdb1a84 MS |
1629 | } |
1630 | #endif | |
1631 | /* Table corresponding to this route. */ | |
1632 | table_id = dplane_ctx_get_table(ctx); | |
1633 | if (table_id < 256) | |
1634 | req.r.rtm_table = table_id; | |
1635 | else { | |
1636 | req.r.rtm_table = RT_TABLE_UNSPEC; | |
5709131c | 1637 | addattr32(&req.n, sizeof(req), RTA_TABLE, table_id); |
7cdb1a84 MS |
1638 | } |
1639 | ||
1640 | _netlink_route_debug(cmd, p, family, dplane_ctx_get_vrf(ctx), table_id); | |
1641 | ||
1642 | /* | |
1643 | * If we are not updating the route and we have received | |
1644 | * a route delete, then all we need to fill in is the | |
1645 | * prefix information to tell the kernel to schwack | |
1646 | * it. | |
1647 | */ | |
1648 | if (cmd == RTM_DELROUTE) | |
1649 | goto skip; | |
1650 | ||
1651 | if (dplane_ctx_get_mtu(ctx) || dplane_ctx_get_nh_mtu(ctx)) { | |
1652 | char buf[NL_PKT_BUF_SIZE]; | |
1653 | struct rtattr *rta = (void *)buf; | |
1654 | uint32_t mtu = dplane_ctx_get_mtu(ctx); | |
1655 | uint32_t nexthop_mtu = dplane_ctx_get_nh_mtu(ctx); | |
5709131c | 1656 | |
7cdb1a84 MS |
1657 | if (!mtu || (nexthop_mtu && nexthop_mtu < mtu)) |
1658 | mtu = nexthop_mtu; | |
1659 | rta->rta_type = RTA_METRICS; | |
1660 | rta->rta_len = RTA_LENGTH(0); | |
5709131c MS |
1661 | rta_addattr_l(rta, NL_PKT_BUF_SIZE, |
1662 | RTAX_MTU, &mtu, sizeof(mtu)); | |
7cdb1a84 MS |
1663 | addattr_l(&req.n, NL_PKT_BUF_SIZE, RTA_METRICS, RTA_DATA(rta), |
1664 | RTA_PAYLOAD(rta)); | |
1665 | } | |
1666 | ||
7c99d51b | 1667 | if (kernel_nexthops_supported()) { |
9a0132a5 DS |
1668 | if (IS_ZEBRA_DEBUG_KERNEL) |
1669 | zlog_debug( | |
1670 | "netlink_route_multipath(): %pFX nhg_id is %u", | |
1671 | p, dplane_ctx_get_nhe_id(ctx)); | |
de3f5488 SW |
1672 | /* Kernel supports nexthop objects */ |
1673 | addattr32(&req.n, sizeof(req), RTA_NH_ID, | |
1674 | dplane_ctx_get_nhe_id(ctx)); | |
1675 | goto skip; | |
1676 | } | |
1677 | ||
7cdb1a84 | 1678 | /* Count overall nexthops so we can decide whether to use singlepath |
5709131c MS |
1679 | * or multipath case. |
1680 | */ | |
7cdb1a84 MS |
1681 | nexthop_num = 0; |
1682 | for (ALL_NEXTHOPS_PTR(dplane_ctx_get_ng(ctx), nexthop)) { | |
1683 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_RECURSIVE)) | |
1684 | continue; | |
1685 | if (cmd == RTM_NEWROUTE && !NEXTHOP_IS_ACTIVE(nexthop->flags)) | |
1686 | continue; | |
1687 | ||
1688 | nexthop_num++; | |
1689 | } | |
1690 | ||
1691 | /* Singlepath case. */ | |
220f0f42 | 1692 | if (nexthop_num == 1) { |
7cdb1a84 MS |
1693 | nexthop_num = 0; |
1694 | for (ALL_NEXTHOPS_PTR(dplane_ctx_get_ng(ctx), nexthop)) { | |
1695 | /* | |
1696 | * So we want to cover 2 types of blackhole | |
1697 | * routes here: | |
1698 | * 1) A normal blackhole route( ala from a static | |
1699 | * install. | |
1700 | * 2) A recursively resolved blackhole route | |
1701 | */ | |
1702 | if (nexthop->type == NEXTHOP_TYPE_BLACKHOLE) { | |
1703 | switch (nexthop->bh_type) { | |
1704 | case BLACKHOLE_ADMINPROHIB: | |
1705 | req.r.rtm_type = RTN_PROHIBIT; | |
1706 | break; | |
1707 | case BLACKHOLE_REJECT: | |
1708 | req.r.rtm_type = RTN_UNREACHABLE; | |
1709 | break; | |
1710 | default: | |
1711 | req.r.rtm_type = RTN_BLACKHOLE; | |
1712 | break; | |
1713 | } | |
1714 | goto skip; | |
1715 | } | |
1716 | if (CHECK_FLAG(nexthop->flags, | |
1717 | NEXTHOP_FLAG_RECURSIVE)) { | |
5709131c MS |
1718 | |
1719 | if (setsrc) | |
1720 | continue; | |
1721 | ||
762288f5 SW |
1722 | setsrc = nexthop_set_src(nexthop, family, &src); |
1723 | ||
f183e380 | 1724 | continue; |
7cdb1a84 MS |
1725 | } |
1726 | ||
1727 | if ((cmd == RTM_NEWROUTE | |
1728 | && NEXTHOP_IS_ACTIVE(nexthop->flags))) { | |
1729 | routedesc = nexthop->rparent | |
1730 | ? "recursive, single-path" | |
1731 | : "single-path"; | |
1732 | ||
1733 | _netlink_route_build_singlepath( | |
9a0132a5 | 1734 | p, routedesc, bytelen, nexthop, &req.n, |
5709131c | 1735 | &req.r, sizeof(req), cmd); |
7cdb1a84 MS |
1736 | nexthop_num++; |
1737 | break; | |
1738 | } | |
1739 | } | |
1740 | if (setsrc && (cmd == RTM_NEWROUTE)) { | |
1741 | if (family == AF_INET) | |
5709131c | 1742 | addattr_l(&req.n, sizeof(req), RTA_PREFSRC, |
7cdb1a84 MS |
1743 | &src.ipv4, bytelen); |
1744 | else if (family == AF_INET6) | |
5709131c | 1745 | addattr_l(&req.n, sizeof(req), RTA_PREFSRC, |
7cdb1a84 MS |
1746 | &src.ipv6, bytelen); |
1747 | } | |
1748 | } else { /* Multipath case */ | |
1749 | char buf[NL_PKT_BUF_SIZE]; | |
1750 | struct rtattr *rta = (void *)buf; | |
1751 | struct rtnexthop *rtnh; | |
81793ac1 | 1752 | const union g_addr *src1 = NULL; |
7cdb1a84 MS |
1753 | |
1754 | rta->rta_type = RTA_MULTIPATH; | |
1755 | rta->rta_len = RTA_LENGTH(0); | |
1756 | rtnh = RTA_DATA(rta); | |
1757 | ||
1758 | nexthop_num = 0; | |
1759 | for (ALL_NEXTHOPS_PTR(dplane_ctx_get_ng(ctx), nexthop)) { | |
7cdb1a84 MS |
1760 | if (CHECK_FLAG(nexthop->flags, |
1761 | NEXTHOP_FLAG_RECURSIVE)) { | |
1762 | /* This only works for IPv4 now */ | |
5709131c MS |
1763 | if (setsrc) |
1764 | continue; | |
1765 | ||
762288f5 | 1766 | setsrc = nexthop_set_src(nexthop, family, &src); |
78e54ded MS |
1767 | |
1768 | continue; | |
7cdb1a84 MS |
1769 | } |
1770 | ||
1771 | if ((cmd == RTM_NEWROUTE | |
1772 | && NEXTHOP_IS_ACTIVE(nexthop->flags))) { | |
1773 | routedesc = nexthop->rparent | |
1774 | ? "recursive, multipath" | |
1775 | : "multipath"; | |
1776 | nexthop_num++; | |
1777 | ||
1778 | _netlink_route_build_multipath( | |
9a0132a5 DS |
1779 | p, routedesc, bytelen, nexthop, rta, |
1780 | rtnh, &req.r, &src1); | |
7cdb1a84 MS |
1781 | rtnh = RTNH_NEXT(rtnh); |
1782 | ||
1783 | if (!setsrc && src1) { | |
1784 | if (family == AF_INET) | |
1785 | src.ipv4 = src1->ipv4; | |
1786 | else if (family == AF_INET6) | |
1787 | src.ipv6 = src1->ipv6; | |
1788 | ||
1789 | setsrc = 1; | |
1790 | } | |
1791 | } | |
1792 | } | |
1793 | if (setsrc && (cmd == RTM_NEWROUTE)) { | |
1794 | if (family == AF_INET) | |
5709131c | 1795 | addattr_l(&req.n, sizeof(req), RTA_PREFSRC, |
7cdb1a84 MS |
1796 | &src.ipv4, bytelen); |
1797 | else if (family == AF_INET6) | |
5709131c | 1798 | addattr_l(&req.n, sizeof(req), RTA_PREFSRC, |
7cdb1a84 MS |
1799 | &src.ipv6, bytelen); |
1800 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1801 | zlog_debug("Setting source"); | |
1802 | } | |
1803 | ||
1804 | if (rta->rta_len > RTA_LENGTH(0)) | |
1805 | addattr_l(&req.n, NL_PKT_BUF_SIZE, RTA_MULTIPATH, | |
1806 | RTA_DATA(rta), RTA_PAYLOAD(rta)); | |
1807 | } | |
1808 | ||
1809 | /* If there is no useful nexthop then return. */ | |
1810 | if (nexthop_num == 0) { | |
1811 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1812 | zlog_debug( | |
1813 | "netlink_route_multipath(): No useful nexthop."); | |
1814 | return 0; | |
1815 | } | |
1816 | ||
1817 | skip: | |
7cdb1a84 MS |
1818 | /* Talk to netlink socket. */ |
1819 | return netlink_talk_info(netlink_talk_filter, &req.n, | |
1820 | dplane_ctx_get_ns(ctx), 0); | |
1821 | } | |
1822 | ||
43b5cc5e | 1823 | int kernel_get_ipmr_sg_stats(struct zebra_vrf *zvrf, void *in) |
e3be0432 | 1824 | { |
5523c156 | 1825 | uint32_t actual_table; |
d62a17ae | 1826 | int suc = 0; |
1827 | struct mcast_route_data *mr = (struct mcast_route_data *)in; | |
bd8b9272 DS |
1828 | struct { |
1829 | struct nlmsghdr n; | |
1830 | struct ndmsg ndm; | |
1831 | char buf[256]; | |
1832 | } req; | |
e3be0432 | 1833 | |
d62a17ae | 1834 | mroute = mr; |
5895d33f | 1835 | struct zebra_ns *zns; |
bd8b9272 | 1836 | |
009f8ad5 | 1837 | zns = zvrf->zns; |
5605ecfc | 1838 | memset(&req, 0, sizeof(req)); |
bd8b9272 DS |
1839 | |
1840 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)); | |
1841 | req.n.nlmsg_flags = NLM_F_REQUEST; | |
1842 | req.n.nlmsg_pid = zns->netlink_cmd.snl.nl_pid; | |
1843 | ||
1844 | req.ndm.ndm_family = RTNL_FAMILY_IPMR; | |
1845 | req.n.nlmsg_type = RTM_GETROUTE; | |
1846 | ||
1847 | addattr_l(&req.n, sizeof(req), RTA_IIF, &mroute->ifindex, 4); | |
1848 | addattr_l(&req.n, sizeof(req), RTA_OIF, &mroute->ifindex, 4); | |
1849 | addattr_l(&req.n, sizeof(req), RTA_SRC, &mroute->sg.src.s_addr, 4); | |
1850 | addattr_l(&req.n, sizeof(req), RTA_DST, &mroute->sg.grp.s_addr, 4); | |
5523c156 DS |
1851 | /* |
1852 | * What? | |
1853 | * | |
1854 | * So during the namespace cleanup we started storing | |
1855 | * the zvrf table_id for the default table as RT_TABLE_MAIN | |
1856 | * which is what the normal routing table for ip routing is. | |
1857 | * This change caused this to break our lookups of sg data | |
1858 | * because prior to this change the zvrf->table_id was 0 | |
1859 | * and when the pim multicast kernel code saw a 0, | |
1860 | * it was auto-translated to RT_TABLE_DEFAULT. But since | |
1861 | * we are now passing in RT_TABLE_MAIN there is no auto-translation | |
1862 | * and the kernel goes screw you and the delicious cookies you | |
1863 | * are trying to give me. So now we have this little hack. | |
1864 | */ | |
1865 | actual_table = (zvrf->table_id == RT_TABLE_MAIN) ? RT_TABLE_DEFAULT : | |
1866 | zvrf->table_id; | |
1867 | addattr_l(&req.n, sizeof(req), RTA_TABLE, &actual_table, 4); | |
e3be0432 | 1868 | |
bd8b9272 DS |
1869 | suc = netlink_talk(netlink_route_change_read_multicast, &req.n, |
1870 | &zns->netlink_cmd, zns, 0); | |
e3be0432 | 1871 | |
bd8b9272 | 1872 | mroute = NULL; |
d62a17ae | 1873 | return suc; |
e3be0432 DS |
1874 | } |
1875 | ||
8d03bc50 SW |
1876 | /* Char length to debug ID with */ |
1877 | #define ID_LENGTH 10 | |
1878 | ||
565ce0d3 | 1879 | static void _netlink_nexthop_build_group(struct nlmsghdr *n, size_t req_size, |
8d03bc50 | 1880 | uint32_t id, |
e22e8001 | 1881 | const struct nh_grp *z_grp, |
0c8215cb | 1882 | const uint8_t count) |
565ce0d3 | 1883 | { |
565ce0d3 | 1884 | struct nexthop_grp grp[count]; |
8d03bc50 SW |
1885 | /* Need space for max group size, "/", and null term */ |
1886 | char buf[(MULTIPATH_NUM * (ID_LENGTH + 1)) + 1]; | |
1887 | char buf1[ID_LENGTH + 2]; | |
1888 | ||
1889 | buf[0] = '\0'; | |
565ce0d3 SW |
1890 | |
1891 | memset(grp, 0, sizeof(grp)); | |
1892 | ||
1893 | if (count) { | |
0c8215cb | 1894 | for (int i = 0; i < count; i++) { |
e22e8001 | 1895 | grp[i].id = z_grp[i].id; |
df7fb580 | 1896 | grp[i].weight = z_grp[i].weight - 1; |
8d03bc50 SW |
1897 | |
1898 | if (IS_ZEBRA_DEBUG_KERNEL) { | |
1899 | if (i == 0) | |
1900 | snprintf(buf, sizeof(buf1), "group %u", | |
1901 | grp[i].id); | |
1902 | else { | |
1903 | snprintf(buf1, sizeof(buf1), "/%u", | |
1904 | grp[i].id); | |
1905 | strlcat(buf, buf1, sizeof(buf)); | |
1906 | } | |
1907 | } | |
565ce0d3 | 1908 | } |
0c8215cb | 1909 | addattr_l(n, req_size, NHA_GROUP, grp, count * sizeof(*grp)); |
565ce0d3 | 1910 | } |
8d03bc50 SW |
1911 | |
1912 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1913 | zlog_debug("%s: ID (%u): %s", __func__, id, buf); | |
565ce0d3 SW |
1914 | } |
1915 | ||
f820d025 SW |
1916 | /** |
1917 | * netlink_nexthop() - Nexthop change via the netlink interface | |
1918 | * | |
1919 | * @ctx: Dataplane ctx | |
1920 | * | |
1921 | * Return: Result status | |
1922 | */ | |
1923 | static int netlink_nexthop(int cmd, struct zebra_dplane_ctx *ctx) | |
1924 | { | |
f820d025 SW |
1925 | struct { |
1926 | struct nlmsghdr n; | |
1927 | struct nhmsg nhm; | |
1928 | char buf[NL_PKT_BUF_SIZE]; | |
1929 | } req; | |
1930 | ||
8d03bc50 SW |
1931 | mpls_lse_t out_lse[MPLS_MAX_LABELS]; |
1932 | char label_buf[256]; | |
1933 | int num_labels = 0; | |
1934 | size_t req_size = sizeof(req); | |
1935 | ||
81505946 | 1936 | /* Nothing to do if the kernel doesn't support nexthop objects */ |
7c99d51b | 1937 | if (!kernel_nexthops_supported()) |
81505946 SW |
1938 | return 0; |
1939 | ||
8d03bc50 SW |
1940 | label_buf[0] = '\0'; |
1941 | ||
1942 | memset(&req, 0, req_size); | |
f820d025 | 1943 | |
f820d025 SW |
1944 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct nhmsg)); |
1945 | req.n.nlmsg_flags = NLM_F_CREATE | NLM_F_REQUEST; | |
9a1588c4 SW |
1946 | |
1947 | if (cmd == RTM_NEWNEXTHOP) | |
1948 | req.n.nlmsg_flags |= NLM_F_REPLACE; | |
1949 | ||
f820d025 | 1950 | req.n.nlmsg_type = cmd; |
4f096395 | 1951 | req.n.nlmsg_pid = dplane_ctx_get_ns(ctx)->nls.snl.nl_pid; |
f820d025 SW |
1952 | |
1953 | req.nhm.nh_family = AF_UNSPEC; | |
fec211ad | 1954 | /* TODO: Scope? */ |
f820d025 | 1955 | |
0c8215cb SW |
1956 | uint32_t id = dplane_ctx_get_nhe_id(ctx); |
1957 | ||
1958 | if (!id) { | |
f820d025 SW |
1959 | flog_err( |
1960 | EC_ZEBRA_NHG_FIB_UPDATE, | |
1961 | "Failed trying to update a nexthop group in the kernel that does not have an ID"); | |
1962 | return -1; | |
1963 | } | |
1964 | ||
8d03bc50 | 1965 | addattr32(&req.n, req_size, NHA_ID, id); |
f820d025 SW |
1966 | |
1967 | if (cmd == RTM_NEWNEXTHOP) { | |
e22e8001 | 1968 | if (dplane_ctx_get_nhe_nh_grp_count(ctx)) |
0c8215cb | 1969 | _netlink_nexthop_build_group( |
8d03bc50 | 1970 | &req.n, req_size, id, |
e22e8001 SW |
1971 | dplane_ctx_get_nhe_nh_grp(ctx), |
1972 | dplane_ctx_get_nhe_nh_grp_count(ctx)); | |
0c8215cb SW |
1973 | else { |
1974 | const struct nexthop *nh = | |
1975 | dplane_ctx_get_nhe_ng(ctx)->nexthop; | |
1976 | afi_t afi = dplane_ctx_get_nhe_afi(ctx); | |
e8b0e420 | 1977 | |
0c8215cb | 1978 | if (afi == AFI_IP) |
565ce0d3 | 1979 | req.nhm.nh_family = AF_INET; |
0c8215cb | 1980 | else if (afi == AFI_IP6) |
565ce0d3 | 1981 | req.nhm.nh_family = AF_INET6; |
f820d025 | 1982 | |
565ce0d3 | 1983 | switch (nh->type) { |
a6e6a6d8 | 1984 | case NEXTHOP_TYPE_IPV4: |
565ce0d3 | 1985 | case NEXTHOP_TYPE_IPV4_IFINDEX: |
8d03bc50 | 1986 | addattr_l(&req.n, req_size, NHA_GATEWAY, |
565ce0d3 SW |
1987 | &nh->gate.ipv4, IPV4_MAX_BYTELEN); |
1988 | break; | |
a6e6a6d8 | 1989 | case NEXTHOP_TYPE_IPV6: |
565ce0d3 | 1990 | case NEXTHOP_TYPE_IPV6_IFINDEX: |
8d03bc50 | 1991 | addattr_l(&req.n, req_size, NHA_GATEWAY, |
565ce0d3 SW |
1992 | &nh->gate.ipv6, IPV6_MAX_BYTELEN); |
1993 | break; | |
1994 | case NEXTHOP_TYPE_BLACKHOLE: | |
8d03bc50 SW |
1995 | addattr_l(&req.n, req_size, NHA_BLACKHOLE, NULL, |
1996 | 0); | |
1997 | /* Blackhole shouldn't have anymore attributes | |
1998 | */ | |
1999 | goto nexthop_done; | |
565ce0d3 SW |
2000 | case NEXTHOP_TYPE_IFINDEX: |
2001 | /* Don't need anymore info for this */ | |
2002 | break; | |
a6e6a6d8 SW |
2003 | } |
2004 | ||
2005 | if (!nh->ifindex) { | |
565ce0d3 SW |
2006 | flog_err( |
2007 | EC_ZEBRA_NHG_FIB_UPDATE, | |
2008 | "Context received for kernel nexthop update without an interface"); | |
2009 | return -1; | |
565ce0d3 SW |
2010 | } |
2011 | ||
8d03bc50 SW |
2012 | addattr32(&req.n, req_size, NHA_OIF, nh->ifindex); |
2013 | ||
62d2ecb2 SW |
2014 | if (CHECK_FLAG(nh->flags, NEXTHOP_FLAG_ONLINK)) |
2015 | req.nhm.nh_flags |= RTNH_F_ONLINK; | |
2016 | ||
8d03bc50 SW |
2017 | num_labels = |
2018 | build_label_stack(nh->nh_label, out_lse, | |
2019 | label_buf, sizeof(label_buf)); | |
2020 | ||
2021 | if (num_labels) { | |
2022 | /* Set the BoS bit */ | |
2023 | out_lse[num_labels - 1] |= | |
2024 | htonl(1 << MPLS_LS_S_SHIFT); | |
2025 | ||
2026 | /* | |
2027 | * TODO: MPLS unsupported for now in kernel. | |
2028 | */ | |
2029 | if (req.nhm.nh_family == AF_MPLS) | |
2030 | goto nexthop_done; | |
2031 | #if 0 | |
2032 | addattr_l(&req.n, req_size, NHA_NEWDST, | |
2033 | &out_lse, | |
2034 | num_labels | |
2035 | * sizeof(mpls_lse_t)); | |
2036 | #endif | |
2037 | else { | |
2038 | struct rtattr *nest; | |
2039 | uint16_t encap = LWTUNNEL_ENCAP_MPLS; | |
2040 | ||
2041 | addattr_l(&req.n, req_size, | |
2042 | NHA_ENCAP_TYPE, &encap, | |
2043 | sizeof(uint16_t)); | |
2044 | nest = addattr_nest(&req.n, req_size, | |
2045 | NHA_ENCAP); | |
2046 | addattr_l(&req.n, req_size, | |
2047 | MPLS_IPTUNNEL_DST, &out_lse, | |
2048 | num_labels | |
2049 | * sizeof(mpls_lse_t)); | |
2050 | addattr_nest_end(&req.n, nest); | |
2051 | } | |
2052 | } | |
2053 | ||
2054 | nexthop_done: | |
2055 | if (IS_ZEBRA_DEBUG_KERNEL) { | |
2056 | char buf[NEXTHOP_STRLEN]; | |
2057 | ||
2058 | snprintfrr(buf, sizeof(buf), "%pNHv", nh); | |
2059 | zlog_debug("%s: ID (%u): %s (%u) %s ", __func__, | |
2060 | id, buf, nh->vrf_id, label_buf); | |
2061 | } | |
f820d025 SW |
2062 | } |
2063 | ||
38e40db1 | 2064 | req.nhm.nh_protocol = zebra2proto(dplane_ctx_get_nhe_type(ctx)); |
f820d025 | 2065 | |
f820d025 SW |
2066 | } else if (cmd != RTM_DELNEXTHOP) { |
2067 | flog_err( | |
2068 | EC_ZEBRA_NHG_FIB_UPDATE, | |
2069 | "Nexthop group kernel update command (%d) does not exist", | |
2070 | cmd); | |
2071 | return -1; | |
2072 | } | |
2073 | ||
0c8215cb | 2074 | _netlink_nexthop_debug(cmd, id); |
f820d025 SW |
2075 | |
2076 | return netlink_talk_info(netlink_talk_filter, &req.n, | |
2077 | dplane_ctx_get_ns(ctx), 0); | |
2078 | } | |
2079 | ||
2080 | /** | |
2081 | * kernel_nexthop_update() - Update/delete a nexthop from the kernel | |
2082 | * | |
2083 | * @ctx: Dataplane context | |
2084 | * | |
2085 | * Return: Dataplane result flag | |
2086 | */ | |
2087 | enum zebra_dplane_result kernel_nexthop_update(struct zebra_dplane_ctx *ctx) | |
2088 | { | |
98cda54a SW |
2089 | int cmd = 0; |
2090 | int ret = 0; | |
f820d025 SW |
2091 | |
2092 | switch (dplane_ctx_get_op(ctx)) { | |
2093 | case DPLANE_OP_NH_DELETE: | |
2094 | cmd = RTM_DELNEXTHOP; | |
2095 | break; | |
2096 | case DPLANE_OP_NH_INSTALL: | |
2097 | case DPLANE_OP_NH_UPDATE: | |
2098 | cmd = RTM_NEWNEXTHOP; | |
2099 | break; | |
2100 | case DPLANE_OP_ROUTE_INSTALL: | |
2101 | case DPLANE_OP_ROUTE_UPDATE: | |
2102 | case DPLANE_OP_ROUTE_DELETE: | |
2103 | case DPLANE_OP_ROUTE_NOTIFY: | |
2104 | case DPLANE_OP_LSP_INSTALL: | |
2105 | case DPLANE_OP_LSP_UPDATE: | |
2106 | case DPLANE_OP_LSP_DELETE: | |
2107 | case DPLANE_OP_LSP_NOTIFY: | |
2108 | case DPLANE_OP_PW_INSTALL: | |
2109 | case DPLANE_OP_PW_UNINSTALL: | |
2110 | case DPLANE_OP_SYS_ROUTE_ADD: | |
2111 | case DPLANE_OP_SYS_ROUTE_DELETE: | |
2112 | case DPLANE_OP_ADDR_INSTALL: | |
2113 | case DPLANE_OP_ADDR_UNINSTALL: | |
2114 | case DPLANE_OP_MAC_INSTALL: | |
2115 | case DPLANE_OP_MAC_DELETE: | |
40a2a6cd SW |
2116 | case DPLANE_OP_NEIGH_INSTALL: |
2117 | case DPLANE_OP_NEIGH_UPDATE: | |
2118 | case DPLANE_OP_NEIGH_DELETE: | |
2119 | case DPLANE_OP_VTEP_ADD: | |
2120 | case DPLANE_OP_VTEP_DELETE: | |
f820d025 SW |
2121 | case DPLANE_OP_NONE: |
2122 | flog_err( | |
2123 | EC_ZEBRA_NHG_FIB_UPDATE, | |
2124 | "Context received for kernel nexthop update with incorrect OP code (%u)", | |
2125 | dplane_ctx_get_op(ctx)); | |
2126 | return ZEBRA_DPLANE_REQUEST_FAILURE; | |
f820d025 SW |
2127 | } |
2128 | ||
2129 | ret = netlink_nexthop(cmd, ctx); | |
2130 | ||
2131 | return (ret == 0 ? ZEBRA_DPLANE_REQUEST_SUCCESS | |
2132 | : ZEBRA_DPLANE_REQUEST_FAILURE); | |
2133 | } | |
2134 | ||
7cdb1a84 MS |
2135 | /* |
2136 | * Update or delete a prefix from the kernel, | |
2137 | * using info from a dataplane context. | |
2138 | */ | |
25779064 | 2139 | enum zebra_dplane_result kernel_route_update(struct zebra_dplane_ctx *ctx) |
7cdb1a84 MS |
2140 | { |
2141 | int cmd, ret; | |
2142 | const struct prefix *p = dplane_ctx_get_dest(ctx); | |
f183e380 | 2143 | struct nexthop *nexthop; |
7cdb1a84 MS |
2144 | |
2145 | if (dplane_ctx_get_op(ctx) == DPLANE_OP_ROUTE_DELETE) { | |
2146 | cmd = RTM_DELROUTE; | |
2147 | } else if (dplane_ctx_get_op(ctx) == DPLANE_OP_ROUTE_INSTALL) { | |
2148 | cmd = RTM_NEWROUTE; | |
2149 | } else if (dplane_ctx_get_op(ctx) == DPLANE_OP_ROUTE_UPDATE) { | |
2150 | ||
2151 | if (p->family == AF_INET || v6_rr_semantics) { | |
2152 | /* Single 'replace' operation */ | |
2153 | cmd = RTM_NEWROUTE; | |
fe5f21af DS |
2154 | |
2155 | /* | |
2156 | * With route replace semantics in place | |
2157 | * for v4 routes and the new route is a system | |
2158 | * route we do not install anything. | |
2159 | * The problem here is that the new system | |
2160 | * route should cause us to withdraw from | |
2161 | * the kernel the old non-system route | |
2162 | */ | |
2163 | if (RSYSTEM_ROUTE(dplane_ctx_get_type(ctx)) && | |
2164 | !RSYSTEM_ROUTE(dplane_ctx_get_old_type(ctx))) | |
2165 | (void)netlink_route_multipath(RTM_DELROUTE, | |
2166 | ctx); | |
7cdb1a84 MS |
2167 | } else { |
2168 | /* | |
2169 | * So v6 route replace semantics are not in | |
2170 | * the kernel at this point as I understand it. | |
2171 | * so let's do a delete then an add. | |
2172 | * In the future once v6 route replace semantics | |
2173 | * are in we can figure out what to do here to | |
2174 | * allow working with old and new kernels. | |
2175 | * | |
2176 | * I'm also intentionally ignoring the failure case | |
2177 | * of the route delete. If that happens yeah we're | |
2178 | * screwed. | |
2179 | */ | |
3cdba47a DS |
2180 | if (!RSYSTEM_ROUTE(dplane_ctx_get_old_type(ctx))) |
2181 | (void)netlink_route_multipath(RTM_DELROUTE, | |
2182 | ctx); | |
7cdb1a84 MS |
2183 | cmd = RTM_NEWROUTE; |
2184 | } | |
2185 | ||
2186 | } else { | |
2187 | return ZEBRA_DPLANE_REQUEST_FAILURE; | |
2188 | } | |
2189 | ||
3cdba47a DS |
2190 | if (!RSYSTEM_ROUTE(dplane_ctx_get_type(ctx))) |
2191 | ret = netlink_route_multipath(cmd, ctx); | |
2192 | else | |
2193 | ret = 0; | |
f183e380 MS |
2194 | if ((cmd == RTM_NEWROUTE) && (ret == 0)) { |
2195 | /* Update installed nexthops to signal which have been | |
2196 | * installed. | |
2197 | */ | |
2198 | for (ALL_NEXTHOPS_PTR(dplane_ctx_get_ng(ctx), nexthop)) { | |
2199 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_RECURSIVE)) | |
2200 | continue; | |
2201 | ||
2202 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE)) { | |
2203 | SET_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB); | |
f183e380 MS |
2204 | } |
2205 | } | |
2206 | } | |
7cdb1a84 MS |
2207 | |
2208 | return (ret == 0 ? | |
2209 | ZEBRA_DPLANE_REQUEST_SUCCESS : ZEBRA_DPLANE_REQUEST_FAILURE); | |
2210 | } | |
2211 | ||
d9f5b2f5 SW |
2212 | /** |
2213 | * netlink_nexthop_process_nh() - Parse the gatway/if info from a new nexthop | |
2214 | * | |
2215 | * @tb: Netlink RTA data | |
2216 | * @family: Address family in the nhmsg | |
8c0a24c1 | 2217 | * @ifp: Interface connected - this should be NULL, we fill it in |
d9f5b2f5 SW |
2218 | * @ns_id: Namspace id |
2219 | * | |
2220 | * Return: New nexthop | |
2221 | */ | |
e22e8001 SW |
2222 | static struct nexthop netlink_nexthop_process_nh(struct rtattr **tb, |
2223 | unsigned char family, | |
2224 | struct interface **ifp, | |
2225 | ns_id_t ns_id) | |
d9f5b2f5 | 2226 | { |
e22e8001 | 2227 | struct nexthop nh = {}; |
d9f5b2f5 | 2228 | void *gate = NULL; |
8e401b25 | 2229 | enum nexthop_types_t type = 0; |
e22e8001 SW |
2230 | int if_index = 0; |
2231 | size_t sz = 0; | |
7134ba70 | 2232 | struct interface *ifp_lookup; |
d9f5b2f5 SW |
2233 | |
2234 | if_index = *(int *)RTA_DATA(tb[NHA_OIF]); | |
2235 | ||
8e401b25 | 2236 | |
d9f5b2f5 SW |
2237 | if (tb[NHA_GATEWAY]) { |
2238 | switch (family) { | |
2239 | case AF_INET: | |
8e401b25 | 2240 | type = NEXTHOP_TYPE_IPV4_IFINDEX; |
d9f5b2f5 SW |
2241 | sz = 4; |
2242 | break; | |
2243 | case AF_INET6: | |
8e401b25 | 2244 | type = NEXTHOP_TYPE_IPV6_IFINDEX; |
d9f5b2f5 SW |
2245 | sz = 16; |
2246 | break; | |
2247 | default: | |
2248 | flog_warn( | |
2249 | EC_ZEBRA_BAD_NHG_MESSAGE, | |
c4239c05 | 2250 | "Nexthop gateway with bad address family (%d) received from kernel", |
d9f5b2f5 | 2251 | family); |
e22e8001 | 2252 | return nh; |
d9f5b2f5 SW |
2253 | } |
2254 | gate = RTA_DATA(tb[NHA_GATEWAY]); | |
e22e8001 | 2255 | } else |
8e401b25 | 2256 | type = NEXTHOP_TYPE_IFINDEX; |
d9f5b2f5 | 2257 | |
8e401b25 | 2258 | if (type) |
e22e8001 | 2259 | nh.type = type; |
8e401b25 SW |
2260 | |
2261 | if (gate) | |
e22e8001 | 2262 | memcpy(&(nh.gate), gate, sz); |
8e401b25 SW |
2263 | |
2264 | if (if_index) | |
e22e8001 | 2265 | nh.ifindex = if_index; |
8e401b25 | 2266 | |
7134ba70 DS |
2267 | ifp_lookup = |
2268 | if_lookup_by_index_per_ns(zebra_ns_lookup(ns_id), nh.ifindex); | |
2269 | ||
e22e8001 | 2270 | if (ifp) |
7134ba70 DS |
2271 | *ifp = ifp_lookup; |
2272 | if (ifp_lookup) | |
2273 | nh.vrf_id = ifp_lookup->vrf_id; | |
e22e8001 | 2274 | else { |
d9f5b2f5 SW |
2275 | flog_warn( |
2276 | EC_ZEBRA_UNKNOWN_INTERFACE, | |
2277 | "%s: Unknown nexthop interface %u received, defaulting to VRF_DEFAULT", | |
15569c58 | 2278 | __func__, nh.ifindex); |
d9f5b2f5 | 2279 | |
e22e8001 | 2280 | nh.vrf_id = VRF_DEFAULT; |
d9f5b2f5 SW |
2281 | } |
2282 | ||
2283 | if (tb[NHA_ENCAP] && tb[NHA_ENCAP_TYPE]) { | |
2284 | uint16_t encap_type = *(uint16_t *)RTA_DATA(tb[NHA_ENCAP_TYPE]); | |
2285 | int num_labels = 0; | |
6e728764 | 2286 | |
d9f5b2f5 SW |
2287 | mpls_label_t labels[MPLS_MAX_LABELS] = {0}; |
2288 | ||
e22e8001 | 2289 | if (encap_type == LWTUNNEL_ENCAP_MPLS) |
d9f5b2f5 | 2290 | num_labels = parse_encap_mpls(tb[NHA_ENCAP], labels); |
d9f5b2f5 | 2291 | |
e22e8001 SW |
2292 | if (num_labels) |
2293 | nexthop_add_labels(&nh, ZEBRA_LSP_STATIC, num_labels, | |
d9f5b2f5 | 2294 | labels); |
d9f5b2f5 SW |
2295 | } |
2296 | ||
2297 | return nh; | |
2298 | } | |
2299 | ||
85f5e761 | 2300 | static int netlink_nexthop_process_group(struct rtattr **tb, |
5a935f79 | 2301 | struct nh_grp *z_grp, int z_grp_size) |
d9f5b2f5 | 2302 | { |
e22e8001 SW |
2303 | uint8_t count = 0; |
2304 | /* linux/nexthop.h group struct */ | |
d9f5b2f5 SW |
2305 | struct nexthop_grp *n_grp = NULL; |
2306 | ||
85f5e761 | 2307 | n_grp = (struct nexthop_grp *)RTA_DATA(tb[NHA_GROUP]); |
d9f5b2f5 SW |
2308 | count = (RTA_PAYLOAD(tb[NHA_GROUP]) / sizeof(*n_grp)); |
2309 | ||
2310 | if (!count || (count * sizeof(*n_grp)) != RTA_PAYLOAD(tb[NHA_GROUP])) { | |
2311 | flog_warn(EC_ZEBRA_BAD_NHG_MESSAGE, | |
2312 | "Invalid nexthop group received from the kernel"); | |
85f5e761 | 2313 | return count; |
d9f5b2f5 SW |
2314 | } |
2315 | ||
38e40db1 | 2316 | #if 0 |
d9f5b2f5 | 2317 | // TODO: Need type for something? |
85f5e761 SW |
2318 | zlog_debug("Nexthop group type: %d", |
2319 | *((uint16_t *)RTA_DATA(tb[NHA_GROUP_TYPE]))); | |
d9f5b2f5 | 2320 | |
38e40db1 | 2321 | #endif |
d9f5b2f5 | 2322 | |
5a935f79 | 2323 | for (int i = 0; ((i < count) && (i < z_grp_size)); i++) { |
e22e8001 | 2324 | z_grp[i].id = n_grp[i].id; |
df7fb580 | 2325 | z_grp[i].weight = n_grp[i].weight + 1; |
85f5e761 | 2326 | } |
d9f5b2f5 SW |
2327 | return count; |
2328 | } | |
2329 | ||
2330 | /** | |
2331 | * netlink_nexthop_change() - Read in change about nexthops from the kernel | |
2332 | * | |
2333 | * @h: Netlink message header | |
2334 | * @ns_id: Namspace id | |
2335 | * @startup: Are we reading under startup conditions? | |
2336 | * | |
2337 | * Return: Result status | |
2338 | */ | |
2339 | int netlink_nexthop_change(struct nlmsghdr *h, ns_id_t ns_id, int startup) | |
2340 | { | |
2341 | int len; | |
2342 | /* nexthop group id */ | |
2343 | uint32_t id; | |
2344 | unsigned char family; | |
38e40db1 | 2345 | int type; |
e8b0e420 | 2346 | afi_t afi = AFI_UNSPEC; |
946de1b9 | 2347 | vrf_id_t vrf_id = VRF_DEFAULT; |
8c0a24c1 | 2348 | struct interface *ifp = NULL; |
d9f5b2f5 | 2349 | struct nhmsg *nhm = NULL; |
e22e8001 SW |
2350 | struct nexthop nh = {}; |
2351 | struct nh_grp grp[MULTIPATH_NUM] = {}; | |
85f5e761 | 2352 | /* Count of nexthops in group array */ |
e22e8001 | 2353 | uint8_t grp_count = 0; |
e22e8001 | 2354 | struct rtattr *tb[NHA_MAX + 1] = {}; |
d9f5b2f5 | 2355 | |
d9f5b2f5 SW |
2356 | nhm = NLMSG_DATA(h); |
2357 | ||
88cafda7 DS |
2358 | if (ns_id) |
2359 | vrf_id = ns_id; | |
2360 | ||
d9f5b2f5 SW |
2361 | if (startup && h->nlmsg_type != RTM_NEWNEXTHOP) |
2362 | return 0; | |
2363 | ||
2364 | len = h->nlmsg_len - NLMSG_LENGTH(sizeof(struct nhmsg)); | |
2365 | if (len < 0) { | |
2366 | zlog_warn( | |
2367 | "%s: Message received from netlink is of a broken size %d %zu", | |
15569c58 | 2368 | __func__, h->nlmsg_len, |
d9f5b2f5 SW |
2369 | (size_t)NLMSG_LENGTH(sizeof(struct nhmsg))); |
2370 | return -1; | |
2371 | } | |
2372 | ||
d9f5b2f5 SW |
2373 | netlink_parse_rtattr(tb, NHA_MAX, RTM_NHA(nhm), len); |
2374 | ||
2375 | ||
2376 | if (!tb[NHA_ID]) { | |
2377 | flog_warn( | |
2378 | EC_ZEBRA_BAD_NHG_MESSAGE, | |
2379 | "Nexthop group without an ID received from the kernel"); | |
2380 | return -1; | |
2381 | } | |
2382 | ||
2383 | /* We use the ID key'd nhg table for kernel updates */ | |
2384 | id = *((uint32_t *)RTA_DATA(tb[NHA_ID])); | |
d9f5b2f5 | 2385 | |
e8b0e420 | 2386 | family = nhm->nh_family; |
e8b0e420 SW |
2387 | afi = family2afi(family); |
2388 | ||
38e40db1 SW |
2389 | type = proto2zebra(nhm->nh_protocol, 0, true); |
2390 | ||
fdee485a SW |
2391 | if (IS_ZEBRA_DEBUG_KERNEL) |
2392 | zlog_debug("%s ID (%u) %s NS %u", | |
2393 | nl_msg_type_to_str(h->nlmsg_type), id, | |
2394 | nl_family_to_str(family), ns_id); | |
2395 | ||
2396 | ||
d9f5b2f5 SW |
2397 | if (h->nlmsg_type == RTM_NEWNEXTHOP) { |
2398 | if (tb[NHA_GROUP]) { | |
2399 | /** | |
2400 | * If this is a group message its only going to have | |
2401 | * an array of nexthop IDs associated with it | |
2402 | */ | |
5a935f79 SW |
2403 | grp_count = netlink_nexthop_process_group( |
2404 | tb, grp, array_size(grp)); | |
85f5e761 SW |
2405 | } else { |
2406 | if (tb[NHA_BLACKHOLE]) { | |
2407 | /** | |
2408 | * This nexthop is just for blackhole-ing | |
2409 | * traffic, it should not have an OIF, GATEWAY, | |
2410 | * or ENCAP | |
2411 | */ | |
e22e8001 SW |
2412 | nh.type = NEXTHOP_TYPE_BLACKHOLE; |
2413 | nh.bh_type = BLACKHOLE_UNSPEC; | |
2414 | } else if (tb[NHA_OIF]) | |
85f5e761 SW |
2415 | /** |
2416 | * This is a true new nexthop, so we need | |
2417 | * to parse the gateway and device info | |
2418 | */ | |
2419 | nh = netlink_nexthop_process_nh(tb, family, | |
2420 | &ifp, ns_id); | |
e22e8001 SW |
2421 | else { |
2422 | ||
8e401b25 SW |
2423 | flog_warn( |
2424 | EC_ZEBRA_BAD_NHG_MESSAGE, | |
2425 | "Invalid Nexthop message received from the kernel with ID (%u)", | |
2426 | id); | |
2427 | return -1; | |
2428 | } | |
e22e8001 SW |
2429 | SET_FLAG(nh.flags, NEXTHOP_FLAG_ACTIVE); |
2430 | if (nhm->nh_flags & RTNH_F_ONLINK) | |
2431 | SET_FLAG(nh.flags, NEXTHOP_FLAG_ONLINK); | |
2432 | vrf_id = nh.vrf_id; | |
d9f5b2f5 SW |
2433 | } |
2434 | ||
38e40db1 SW |
2435 | if (zebra_nhg_kernel_find(id, &nh, grp, grp_count, vrf_id, afi, |
2436 | type, startup)) | |
e22e8001 | 2437 | return -1; |
8e401b25 | 2438 | |
9a1588c4 | 2439 | } else if (h->nlmsg_type == RTM_DELNEXTHOP) |
88cafda7 | 2440 | zebra_nhg_kernel_del(id, vrf_id); |
d9f5b2f5 | 2441 | |
d9f5b2f5 SW |
2442 | return 0; |
2443 | } | |
2444 | ||
2445 | /** | |
2446 | * netlink_request_nexthop() - Request nextop information from the kernel | |
2447 | * @zns: Zebra namespace | |
2448 | * @family: AF_* netlink family | |
2449 | * @type: RTM_* route type | |
2450 | * | |
2451 | * Return: Result status | |
2452 | */ | |
2453 | static int netlink_request_nexthop(struct zebra_ns *zns, int family, int type) | |
2454 | { | |
2455 | struct { | |
2456 | struct nlmsghdr n; | |
2457 | struct nhmsg nhm; | |
2458 | } req; | |
2459 | ||
2460 | /* Form the request, specifying filter (rtattr) if needed. */ | |
2461 | memset(&req, 0, sizeof(req)); | |
2462 | req.n.nlmsg_type = type; | |
2463 | req.n.nlmsg_flags = NLM_F_ROOT | NLM_F_MATCH | NLM_F_REQUEST; | |
2464 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct nhmsg)); | |
2465 | req.nhm.nh_family = family; | |
2466 | ||
2467 | return netlink_request(&zns->netlink_cmd, &req.n); | |
2468 | } | |
2469 | ||
7d5bb02b | 2470 | |
d9f5b2f5 SW |
2471 | /** |
2472 | * netlink_nexthop_read() - Nexthop read function using netlink interface | |
2473 | * | |
2474 | * @zns: Zebra name space | |
2475 | * | |
2476 | * Return: Result status | |
2477 | * Only called at bootstrap time. | |
2478 | */ | |
2479 | int netlink_nexthop_read(struct zebra_ns *zns) | |
2480 | { | |
2481 | int ret; | |
2482 | struct zebra_dplane_info dp_info; | |
2483 | ||
2484 | zebra_dplane_info_from_zns(&dp_info, zns, true /*is_cmd*/); | |
2485 | ||
2486 | /* Get nexthop objects */ | |
2487 | ret = netlink_request_nexthop(zns, AF_UNSPEC, RTM_GETNEXTHOP); | |
2488 | if (ret < 0) | |
2489 | return ret; | |
2490 | ret = netlink_parse_info(netlink_nexthop_change, &zns->netlink_cmd, | |
2491 | &dp_info, 0, 1); | |
81505946 SW |
2492 | |
2493 | if (!ret) | |
2494 | /* If we succesfully read in nexthop objects, | |
2495 | * this kernel must support them. | |
2496 | */ | |
2497 | supports_nh = true; | |
7c99d51b MS |
2498 | |
2499 | if (IS_ZEBRA_DEBUG_KERNEL || IS_ZEBRA_DEBUG_NHG) | |
2500 | zlog_debug("Nexthop objects %ssupported on this kernel", | |
2501 | supports_nh ? "" : "not "); | |
81505946 | 2502 | |
60e0eaee | 2503 | return ret; |
d9f5b2f5 SW |
2504 | } |
2505 | ||
2506 | ||
d62a17ae | 2507 | int kernel_neigh_update(int add, int ifindex, uint32_t addr, char *lla, |
5895d33f | 2508 | int llalen, ns_id_t ns_id) |
6b8a5694 | 2509 | { |
d62a17ae | 2510 | return netlink_neigh_update(add ? RTM_NEWNEIGH : RTM_DELNEIGH, ifindex, |
5895d33f | 2511 | addr, lla, llalen, ns_id); |
6b8a5694 | 2512 | } |
718e3744 | 2513 | |
13d60d35 | 2514 | /* |
2515 | * Add remote VTEP to the flood list for this VxLAN interface (VNI). This | |
2516 | * is done by adding an FDB entry with a MAC of 00:00:00:00:00:00. | |
2517 | */ | |
0bbd4ff4 MS |
2518 | static int netlink_vxlan_flood_update_ctx(const struct zebra_dplane_ctx *ctx, |
2519 | int cmd) | |
13d60d35 | 2520 | { |
f3dbec60 | 2521 | uint8_t protocol = RTPROT_ZEBRA; |
d62a17ae | 2522 | struct { |
2523 | struct nlmsghdr n; | |
2524 | struct ndmsg ndm; | |
2525 | char buf[256]; | |
2526 | } req; | |
d7c0a89a | 2527 | uint8_t dst_mac[6] = {0x0, 0x0, 0x0, 0x0, 0x0, 0x0}; |
0bbd4ff4 | 2528 | const struct ipaddr *addr; |
d62a17ae | 2529 | |
5605ecfc | 2530 | memset(&req, 0, sizeof(req)); |
d62a17ae | 2531 | |
2532 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)); | |
2533 | req.n.nlmsg_flags = NLM_F_REQUEST; | |
2534 | if (cmd == RTM_NEWNEIGH) | |
2535 | req.n.nlmsg_flags |= (NLM_F_CREATE | NLM_F_APPEND); | |
2536 | req.n.nlmsg_type = cmd; | |
2537 | req.ndm.ndm_family = PF_BRIDGE; | |
2538 | req.ndm.ndm_state = NUD_NOARP | NUD_PERMANENT; | |
fec211ad | 2539 | req.ndm.ndm_flags |= NTF_SELF; /* Handle by "self", not "master" */ |
d62a17ae | 2540 | |
2541 | ||
f3dbec60 DS |
2542 | addattr_l(&req.n, sizeof(req), |
2543 | NDA_PROTOCOL, &protocol, sizeof(protocol)); | |
d62a17ae | 2544 | addattr_l(&req.n, sizeof(req), NDA_LLADDR, &dst_mac, 6); |
0bbd4ff4 | 2545 | req.ndm.ndm_ifindex = dplane_ctx_get_ifindex(ctx); |
13d60d35 | 2546 | |
0bbd4ff4 | 2547 | addr = dplane_ctx_neigh_get_ipaddr(ctx); |
13d60d35 | 2548 | |
0bbd4ff4 | 2549 | addattr_l(&req.n, sizeof(req), NDA_DST, &(addr->ipaddr_v4), 4); |
13d60d35 | 2550 | |
0bbd4ff4 MS |
2551 | return netlink_talk_info(netlink_talk_filter, &req.n, |
2552 | dplane_ctx_get_ns(ctx), 0); | |
13d60d35 | 2553 | } |
2554 | ||
2232a77c | 2555 | #ifndef NDA_RTA |
d62a17ae | 2556 | #define NDA_RTA(r) \ |
2557 | ((struct rtattr *)(((char *)(r)) + NLMSG_ALIGN(sizeof(struct ndmsg)))) | |
2232a77c | 2558 | #endif |
2559 | ||
2414abd3 | 2560 | static int netlink_macfdb_change(struct nlmsghdr *h, int len, ns_id_t ns_id) |
2232a77c | 2561 | { |
d62a17ae | 2562 | struct ndmsg *ndm; |
2563 | struct interface *ifp; | |
2564 | struct zebra_if *zif; | |
d62a17ae | 2565 | struct rtattr *tb[NDA_MAX + 1]; |
2566 | struct interface *br_if; | |
2567 | struct ethaddr mac; | |
2568 | vlanid_t vid = 0; | |
4b3f26f4 | 2569 | struct in_addr vtep_ip; |
d62a17ae | 2570 | int vid_present = 0, dst_present = 0; |
2571 | char buf[ETHER_ADDR_STRLEN]; | |
2572 | char vid_buf[20]; | |
2573 | char dst_buf[30]; | |
a37f4598 | 2574 | bool sticky; |
d62a17ae | 2575 | |
2576 | ndm = NLMSG_DATA(h); | |
2577 | ||
2853fed6 | 2578 | /* We only process macfdb notifications if EVPN is enabled */ |
2579 | if (!is_evpn_enabled()) | |
2580 | return 0; | |
2581 | ||
4b3f26f4 | 2582 | /* Parse attributes and extract fields of interest. Do basic |
2583 | * validation of the fields. | |
2584 | */ | |
2585 | memset(tb, 0, sizeof tb); | |
d62a17ae | 2586 | netlink_parse_rtattr(tb, NDA_MAX, NDA_RTA(ndm), len); |
2587 | ||
2588 | if (!tb[NDA_LLADDR]) { | |
28bd0652 | 2589 | if (IS_ZEBRA_DEBUG_KERNEL) |
4b3f26f4 | 2590 | zlog_debug("%s AF_BRIDGE IF %u - no LLADDR", |
28bd0652 | 2591 | nl_msg_type_to_str(h->nlmsg_type), |
4b3f26f4 | 2592 | ndm->ndm_ifindex); |
d62a17ae | 2593 | return 0; |
2594 | } | |
2595 | ||
ff8b7eb8 | 2596 | if (RTA_PAYLOAD(tb[NDA_LLADDR]) != ETH_ALEN) { |
28bd0652 DS |
2597 | if (IS_ZEBRA_DEBUG_KERNEL) |
2598 | zlog_debug( | |
4b3f26f4 | 2599 | "%s AF_BRIDGE IF %u - LLADDR is not MAC, len %lu", |
2600 | nl_msg_type_to_str(h->nlmsg_type), ndm->ndm_ifindex, | |
28bd0652 | 2601 | (unsigned long)RTA_PAYLOAD(tb[NDA_LLADDR])); |
d62a17ae | 2602 | return 0; |
2603 | } | |
2604 | ||
ff8b7eb8 | 2605 | memcpy(&mac, RTA_DATA(tb[NDA_LLADDR]), ETH_ALEN); |
d62a17ae | 2606 | |
2607 | if ((NDA_VLAN <= NDA_MAX) && tb[NDA_VLAN]) { | |
2608 | vid_present = 1; | |
d7c0a89a | 2609 | vid = *(uint16_t *)RTA_DATA(tb[NDA_VLAN]); |
d62a17ae | 2610 | sprintf(vid_buf, " VLAN %u", vid); |
2611 | } | |
2612 | ||
2613 | if (tb[NDA_DST]) { | |
2614 | /* TODO: Only IPv4 supported now. */ | |
2615 | dst_present = 1; | |
4b3f26f4 | 2616 | memcpy(&vtep_ip.s_addr, RTA_DATA(tb[NDA_DST]), |
d62a17ae | 2617 | IPV4_MAX_BYTELEN); |
4b3f26f4 | 2618 | sprintf(dst_buf, " dst %s", inet_ntoa(vtep_ip)); |
d62a17ae | 2619 | } |
2620 | ||
d62a17ae | 2621 | if (IS_ZEBRA_DEBUG_KERNEL) |
4b3f26f4 | 2622 | zlog_debug("Rx %s AF_BRIDGE IF %u%s st 0x%x fl 0x%x MAC %s%s", |
d62a17ae | 2623 | nl_msg_type_to_str(h->nlmsg_type), |
d62a17ae | 2624 | ndm->ndm_ifindex, vid_present ? vid_buf : "", |
4b3f26f4 | 2625 | ndm->ndm_state, ndm->ndm_flags, |
d62a17ae | 2626 | prefix_mac2str(&mac, buf, sizeof(buf)), |
2627 | dst_present ? dst_buf : ""); | |
2628 | ||
4b3f26f4 | 2629 | /* The interface should exist. */ |
2630 | ifp = if_lookup_by_index_per_ns(zebra_ns_lookup(ns_id), | |
2631 | ndm->ndm_ifindex); | |
2632 | if (!ifp || !ifp->info) | |
2633 | return 0; | |
2634 | ||
2635 | /* The interface should be something we're interested in. */ | |
2636 | if (!IS_ZEBRA_IF_BRIDGE_SLAVE(ifp)) | |
2637 | return 0; | |
2638 | ||
2639 | zif = (struct zebra_if *)ifp->info; | |
2640 | if ((br_if = zif->brslave_info.br_if) == NULL) { | |
2641 | if (IS_ZEBRA_DEBUG_KERNEL) | |
2642 | zlog_debug( | |
2643 | "%s AF_BRIDGE IF %s(%u) brIF %u - no bridge master", | |
2644 | nl_msg_type_to_str(h->nlmsg_type), ifp->name, | |
2645 | ndm->ndm_ifindex, | |
2646 | zif->brslave_info.bridge_ifindex); | |
2647 | return 0; | |
2648 | } | |
2649 | ||
2650 | sticky = !!(ndm->ndm_state & NUD_NOARP); | |
2651 | ||
28bd0652 DS |
2652 | if (filter_vlan && vid != filter_vlan) { |
2653 | if (IS_ZEBRA_DEBUG_KERNEL) | |
d6951e5e | 2654 | zlog_debug(" Filtered due to filter vlan: %d", |
28bd0652 | 2655 | filter_vlan); |
d62a17ae | 2656 | return 0; |
28bd0652 | 2657 | } |
d62a17ae | 2658 | |
2659 | /* If add or update, do accordingly if learnt on a "local" interface; if | |
2660 | * the notification is over VxLAN, this has to be related to | |
2661 | * multi-homing, | |
2662 | * so perform an implicit delete of any local entry (if it exists). | |
2663 | */ | |
2664 | if (h->nlmsg_type == RTM_NEWNEIGH) { | |
4b3f26f4 | 2665 | /* Drop "permanent" entries. */ |
2666 | if (ndm->ndm_state & NUD_PERMANENT) { | |
2667 | if (IS_ZEBRA_DEBUG_KERNEL) | |
d6951e5e DL |
2668 | zlog_debug( |
2669 | " Dropping entry because of NUD_PERMANENT"); | |
2670 | return 0; | |
4b3f26f4 | 2671 | } |
2672 | ||
d62a17ae | 2673 | if (IS_ZEBRA_IF_VXLAN(ifp)) |
2674 | return zebra_vxlan_check_del_local_mac(ifp, br_if, &mac, | |
2675 | vid); | |
2676 | ||
2677 | return zebra_vxlan_local_mac_add_update(ifp, br_if, &mac, vid, | |
2678 | sticky); | |
2679 | } | |
2680 | ||
2681 | /* This is a delete notification. | |
4b3f26f4 | 2682 | * Ignore the notification with IP dest as it may just signify that the |
2683 | * MAC has moved from remote to local. The exception is the special | |
2684 | * all-zeros MAC that represents the BUM flooding entry; we may have | |
2685 | * to readd it. Otherwise, | |
d62a17ae | 2686 | * 1. For a MAC over VxLan, check if it needs to be refreshed(readded) |
2687 | * 2. For a MAC over "local" interface, delete the mac | |
2688 | * Note: We will get notifications from both bridge driver and VxLAN | |
2689 | * driver. | |
d62a17ae | 2690 | */ |
28bd0652 | 2691 | if (dst_present) { |
4b3f26f4 | 2692 | u_char zero_mac[6] = {0x0, 0x0, 0x0, 0x0, 0x0, 0x0}; |
2693 | ||
2694 | if (!memcmp(zero_mac, mac.octet, ETH_ALEN)) | |
2695 | return zebra_vxlan_check_readd_vtep(ifp, vtep_ip); | |
d62a17ae | 2696 | return 0; |
28bd0652 | 2697 | } |
d62a17ae | 2698 | |
2699 | if (IS_ZEBRA_IF_VXLAN(ifp)) | |
2700 | return zebra_vxlan_check_readd_remote_mac(ifp, br_if, &mac, | |
2701 | vid); | |
2702 | ||
2703 | return zebra_vxlan_local_mac_del(ifp, br_if, &mac, vid); | |
2232a77c | 2704 | } |
2705 | ||
2414abd3 | 2706 | static int netlink_macfdb_table(struct nlmsghdr *h, ns_id_t ns_id, int startup) |
2232a77c | 2707 | { |
d62a17ae | 2708 | int len; |
2709 | struct ndmsg *ndm; | |
2232a77c | 2710 | |
d62a17ae | 2711 | if (h->nlmsg_type != RTM_NEWNEIGH) |
2712 | return 0; | |
2232a77c | 2713 | |
d62a17ae | 2714 | /* Length validity. */ |
2715 | len = h->nlmsg_len - NLMSG_LENGTH(sizeof(struct ndmsg)); | |
2716 | if (len < 0) | |
2717 | return -1; | |
2232a77c | 2718 | |
d62a17ae | 2719 | /* We are interested only in AF_BRIDGE notifications. */ |
2720 | ndm = NLMSG_DATA(h); | |
2721 | if (ndm->ndm_family != AF_BRIDGE) | |
2722 | return 0; | |
2232a77c | 2723 | |
2414abd3 | 2724 | return netlink_macfdb_change(h, len, ns_id); |
2232a77c | 2725 | } |
2726 | ||
2727 | /* Request for MAC FDB information from the kernel */ | |
85a75f1e MS |
2728 | static int netlink_request_macs(struct nlsock *netlink_cmd, int family, |
2729 | int type, ifindex_t master_ifindex) | |
2232a77c | 2730 | { |
d62a17ae | 2731 | struct { |
2732 | struct nlmsghdr n; | |
2733 | struct ifinfomsg ifm; | |
2734 | char buf[256]; | |
2735 | } req; | |
2736 | ||
2737 | /* Form the request, specifying filter (rtattr) if needed. */ | |
2738 | memset(&req, 0, sizeof(req)); | |
2739 | req.n.nlmsg_type = type; | |
718f9b0f | 2740 | req.n.nlmsg_flags = NLM_F_ROOT | NLM_F_MATCH | NLM_F_REQUEST; |
d62a17ae | 2741 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg)); |
2742 | req.ifm.ifi_family = family; | |
2743 | if (master_ifindex) | |
2744 | addattr32(&req.n, sizeof(req), IFLA_MASTER, master_ifindex); | |
2745 | ||
85a75f1e | 2746 | return netlink_request(netlink_cmd, &req.n); |
2232a77c | 2747 | } |
2748 | ||
2749 | /* | |
2750 | * MAC forwarding database read using netlink interface. This is invoked | |
2751 | * at startup. | |
2752 | */ | |
d62a17ae | 2753 | int netlink_macfdb_read(struct zebra_ns *zns) |
2232a77c | 2754 | { |
d62a17ae | 2755 | int ret; |
85a75f1e MS |
2756 | struct zebra_dplane_info dp_info; |
2757 | ||
2758 | zebra_dplane_info_from_zns(&dp_info, zns, true /*is_cmd*/); | |
d62a17ae | 2759 | |
2760 | /* Get bridge FDB table. */ | |
85a75f1e MS |
2761 | ret = netlink_request_macs(&zns->netlink_cmd, AF_BRIDGE, RTM_GETNEIGH, |
2762 | 0); | |
d62a17ae | 2763 | if (ret < 0) |
2764 | return ret; | |
2765 | /* We are reading entire table. */ | |
2766 | filter_vlan = 0; | |
85a75f1e MS |
2767 | ret = netlink_parse_info(netlink_macfdb_table, &zns->netlink_cmd, |
2768 | &dp_info, 0, 1); | |
d62a17ae | 2769 | |
2770 | return ret; | |
2232a77c | 2771 | } |
2772 | ||
2773 | /* | |
2774 | * MAC forwarding database read using netlink interface. This is for a | |
2775 | * specific bridge and matching specific access VLAN (if VLAN-aware bridge). | |
2776 | */ | |
d62a17ae | 2777 | int netlink_macfdb_read_for_bridge(struct zebra_ns *zns, struct interface *ifp, |
2778 | struct interface *br_if) | |
2232a77c | 2779 | { |
d62a17ae | 2780 | struct zebra_if *br_zif; |
2781 | struct zebra_if *zif; | |
2782 | struct zebra_l2info_vxlan *vxl; | |
85a75f1e | 2783 | struct zebra_dplane_info dp_info; |
d62a17ae | 2784 | int ret = 0; |
2785 | ||
85a75f1e | 2786 | zebra_dplane_info_from_zns(&dp_info, zns, true /*is_cmd*/); |
d62a17ae | 2787 | |
2788 | /* Save VLAN we're filtering on, if needed. */ | |
2789 | br_zif = (struct zebra_if *)br_if->info; | |
2790 | zif = (struct zebra_if *)ifp->info; | |
2791 | vxl = &zif->l2info.vxl; | |
2792 | if (IS_ZEBRA_IF_BRIDGE_VLAN_AWARE(br_zif)) | |
2793 | filter_vlan = vxl->access_vlan; | |
2794 | ||
2795 | /* Get bridge FDB table for specific bridge - we do the VLAN filtering. | |
2796 | */ | |
85a75f1e | 2797 | ret = netlink_request_macs(&zns->netlink_cmd, AF_BRIDGE, RTM_GETNEIGH, |
d62a17ae | 2798 | br_if->ifindex); |
2799 | if (ret < 0) | |
2800 | return ret; | |
85a75f1e MS |
2801 | ret = netlink_parse_info(netlink_macfdb_table, &zns->netlink_cmd, |
2802 | &dp_info, 0, 0); | |
d62a17ae | 2803 | |
2804 | /* Reset VLAN filter. */ | |
2805 | filter_vlan = 0; | |
2806 | return ret; | |
2232a77c | 2807 | } |
2808 | ||
67fb9374 CS |
2809 | |
2810 | /* Request for MAC FDB for a specific MAC address in VLAN from the kernel */ | |
2811 | static int netlink_request_specific_mac_in_bridge(struct zebra_ns *zns, | |
2812 | int family, | |
2813 | int type, | |
2814 | struct interface *br_if, | |
2815 | struct ethaddr *mac, | |
2816 | vlanid_t vid) | |
2817 | { | |
2818 | struct { | |
2819 | struct nlmsghdr n; | |
2820 | struct ndmsg ndm; | |
2821 | char buf[256]; | |
2822 | } req; | |
2823 | struct zebra_if *br_zif; | |
2824 | char buf[ETHER_ADDR_STRLEN]; | |
2825 | ||
2826 | memset(&req, 0, sizeof(req)); | |
2827 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)); | |
2828 | req.n.nlmsg_type = type; /* RTM_GETNEIGH */ | |
2829 | req.n.nlmsg_flags = NLM_F_REQUEST; | |
2830 | req.ndm.ndm_family = family; /* AF_BRIDGE */ | |
2831 | /* req.ndm.ndm_state = NUD_REACHABLE; */ | |
2832 | ||
2833 | addattr_l(&req.n, sizeof(req), NDA_LLADDR, mac, 6); | |
2834 | ||
2835 | br_zif = (struct zebra_if *)br_if->info; | |
2836 | if (IS_ZEBRA_IF_BRIDGE_VLAN_AWARE(br_zif) && vid > 0) | |
2837 | addattr16(&req.n, sizeof(req), NDA_VLAN, vid); | |
2838 | ||
2839 | addattr32(&req.n, sizeof(req), NDA_MASTER, br_if->ifindex); | |
2840 | ||
2841 | if (IS_ZEBRA_DEBUG_KERNEL) | |
15569c58 | 2842 | zlog_debug("%s: Tx family %s IF %s(%u) MAC %s vid %u", __func__, |
67fb9374 CS |
2843 | nl_family_to_str(req.ndm.ndm_family), br_if->name, |
2844 | br_if->ifindex, | |
2845 | prefix_mac2str(mac, buf, sizeof(buf)), vid); | |
2846 | ||
2847 | return netlink_request(&zns->netlink_cmd, &req.n); | |
2848 | } | |
2849 | ||
2850 | int netlink_macfdb_read_specific_mac(struct zebra_ns *zns, | |
2851 | struct interface *br_if, | |
2852 | struct ethaddr *mac, vlanid_t vid) | |
2853 | { | |
2854 | int ret = 0; | |
2855 | struct zebra_dplane_info dp_info; | |
2856 | ||
2857 | zebra_dplane_info_from_zns(&dp_info, zns, true /*is_cmd*/); | |
2858 | ||
2859 | /* Get bridge FDB table for specific bridge - we do the VLAN filtering. | |
2860 | */ | |
2861 | ret = netlink_request_specific_mac_in_bridge(zns, AF_BRIDGE, | |
2862 | RTM_GETNEIGH, | |
2863 | br_if, mac, vid); | |
2864 | if (ret < 0) | |
2865 | return ret; | |
2866 | ||
2867 | ret = netlink_parse_info(netlink_macfdb_table, &zns->netlink_cmd, | |
2868 | &dp_info, 1, 0); | |
2869 | ||
2870 | return ret; | |
2871 | } | |
036d93c0 MS |
2872 | |
2873 | /* | |
2874 | * Netlink-specific handler for MAC updates using dataplane context object. | |
2875 | */ | |
2876 | static enum zebra_dplane_result | |
2877 | netlink_macfdb_update_ctx(struct zebra_dplane_ctx *ctx) | |
2232a77c | 2878 | { |
f3dbec60 | 2879 | uint8_t protocol = RTPROT_ZEBRA; |
d62a17ae | 2880 | struct { |
2881 | struct nlmsghdr n; | |
2882 | struct ndmsg ndm; | |
2883 | char buf[256]; | |
2884 | } req; | |
036d93c0 | 2885 | int ret; |
d62a17ae | 2886 | int dst_alen; |
36590076 | 2887 | int vid_present = 0; |
036d93c0 MS |
2888 | int cmd; |
2889 | struct in_addr vtep_ip; | |
2890 | vlanid_t vid; | |
2891 | ||
2892 | if (dplane_ctx_get_op(ctx) == DPLANE_OP_MAC_INSTALL) | |
2893 | cmd = RTM_NEWNEIGH; | |
2894 | else | |
2895 | cmd = RTM_DELNEIGH; | |
2896 | ||
5605ecfc | 2897 | memset(&req, 0, sizeof(req)); |
d62a17ae | 2898 | |
2899 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)); | |
2900 | req.n.nlmsg_flags = NLM_F_REQUEST; | |
2901 | if (cmd == RTM_NEWNEIGH) | |
2902 | req.n.nlmsg_flags |= (NLM_F_CREATE | NLM_F_REPLACE); | |
2903 | req.n.nlmsg_type = cmd; | |
2904 | req.ndm.ndm_family = AF_BRIDGE; | |
2905 | req.ndm.ndm_flags |= NTF_SELF | NTF_MASTER; | |
2906 | req.ndm.ndm_state = NUD_REACHABLE; | |
2907 | ||
036d93c0 | 2908 | if (dplane_ctx_mac_is_sticky(ctx)) |
d62a17ae | 2909 | req.ndm.ndm_state |= NUD_NOARP; |
2910 | else | |
2911 | req.ndm.ndm_flags |= NTF_EXT_LEARNED; | |
2912 | ||
f3dbec60 DS |
2913 | addattr_l(&req.n, sizeof(req), |
2914 | NDA_PROTOCOL, &protocol, sizeof(protocol)); | |
036d93c0 MS |
2915 | addattr_l(&req.n, sizeof(req), NDA_LLADDR, |
2916 | dplane_ctx_mac_get_addr(ctx), 6); | |
478566d6 | 2917 | req.ndm.ndm_ifindex = dplane_ctx_get_ifindex(ctx); |
036d93c0 | 2918 | |
d63c1b18 | 2919 | dst_alen = 4; // TODO: hardcoded |
036d93c0 | 2920 | vtep_ip = *(dplane_ctx_mac_get_vtep_ip(ctx)); |
d63c1b18 | 2921 | addattr_l(&req.n, sizeof(req), NDA_DST, &vtep_ip, dst_alen); |
036d93c0 | 2922 | |
478566d6 MS |
2923 | vid = dplane_ctx_mac_get_vlan(ctx); |
2924 | ||
2925 | if (vid > 0) { | |
d62a17ae | 2926 | addattr16(&req.n, sizeof(req), NDA_VLAN, vid); |
2927 | vid_present = 1; | |
d62a17ae | 2928 | } |
478566d6 MS |
2929 | addattr32(&req.n, sizeof(req), NDA_MASTER, |
2930 | dplane_ctx_mac_get_br_ifindex(ctx)); | |
d62a17ae | 2931 | |
036d93c0 MS |
2932 | if (IS_ZEBRA_DEBUG_KERNEL) { |
2933 | char ipbuf[PREFIX_STRLEN]; | |
2934 | char buf[ETHER_ADDR_STRLEN]; | |
2935 | char dst_buf[PREFIX_STRLEN + 10]; | |
478566d6 MS |
2936 | char vid_buf[20]; |
2937 | ||
2938 | if (vid_present) | |
2939 | snprintf(vid_buf, sizeof(vid_buf), " VLAN %u", vid); | |
2940 | else | |
2941 | vid_buf[0] = '\0'; | |
036d93c0 MS |
2942 | |
2943 | inet_ntop(AF_INET, &vtep_ip, ipbuf, sizeof(ipbuf)); | |
2944 | snprintf(dst_buf, sizeof(dst_buf), " dst %s", ipbuf); | |
2945 | prefix_mac2str(dplane_ctx_mac_get_addr(ctx), buf, sizeof(buf)); | |
2946 | ||
d62a17ae | 2947 | zlog_debug("Tx %s family %s IF %s(%u)%s %sMAC %s%s", |
2948 | nl_msg_type_to_str(cmd), | |
478566d6 MS |
2949 | nl_family_to_str(req.ndm.ndm_family), |
2950 | dplane_ctx_get_ifname(ctx), | |
2951 | dplane_ctx_get_ifindex(ctx), vid_buf, | |
036d93c0 MS |
2952 | dplane_ctx_mac_is_sticky(ctx) ? "sticky " : "", |
2953 | buf, dst_buf); | |
2954 | } | |
d62a17ae | 2955 | |
036d93c0 MS |
2956 | ret = netlink_talk_info(netlink_talk_filter, &req.n, |
2957 | dplane_ctx_get_ns(ctx), 0); | |
2958 | if (ret == 0) | |
2959 | return ZEBRA_DPLANE_REQUEST_SUCCESS; | |
2960 | else | |
2961 | return ZEBRA_DPLANE_REQUEST_FAILURE; | |
2232a77c | 2962 | } |
2963 | ||
f17b99ed DS |
2964 | /* |
2965 | * In the event the kernel deletes ipv4 link-local neighbor entries created for | |
2966 | * 5549 support, re-install them. | |
2967 | */ | |
2968 | static void netlink_handle_5549(struct ndmsg *ndm, struct zebra_if *zif, | |
9b036974 DS |
2969 | struct interface *ifp, struct ipaddr *ip, |
2970 | bool handle_failed) | |
f17b99ed DS |
2971 | { |
2972 | if (ndm->ndm_family != AF_INET) | |
2973 | return; | |
2974 | ||
2975 | if (!zif->v6_2_v4_ll_neigh_entry) | |
2976 | return; | |
2977 | ||
2978 | if (ipv4_ll.s_addr != ip->ip._v4_addr.s_addr) | |
2979 | return; | |
2980 | ||
9b036974 DS |
2981 | if (handle_failed && ndm->ndm_state & NUD_FAILED) { |
2982 | zlog_info("Neighbor Entry for %s has entered a failed state, not reinstalling", | |
2983 | ifp->name); | |
2984 | return; | |
2985 | } | |
2986 | ||
f17b99ed DS |
2987 | if_nbr_ipv6ll_to_ipv4ll_neigh_update(ifp, &zif->v6_2_v4_ll_addr6, true); |
2988 | } | |
2989 | ||
d62a17ae | 2990 | #define NUD_VALID \ |
2991 | (NUD_PERMANENT | NUD_NOARP | NUD_REACHABLE | NUD_PROBE | NUD_STALE \ | |
2992 | | NUD_DELAY) | |
2232a77c | 2993 | |
2414abd3 | 2994 | static int netlink_ipneigh_change(struct nlmsghdr *h, int len, ns_id_t ns_id) |
2232a77c | 2995 | { |
d62a17ae | 2996 | struct ndmsg *ndm; |
2997 | struct interface *ifp; | |
2998 | struct zebra_if *zif; | |
d62a17ae | 2999 | struct rtattr *tb[NDA_MAX + 1]; |
3000 | struct interface *link_if; | |
3001 | struct ethaddr mac; | |
3002 | struct ipaddr ip; | |
3003 | char buf[ETHER_ADDR_STRLEN]; | |
3004 | char buf2[INET6_ADDRSTRLEN]; | |
3005 | int mac_present = 0; | |
a37f4598 | 3006 | bool is_ext; |
3007 | bool is_router; | |
d62a17ae | 3008 | |
3009 | ndm = NLMSG_DATA(h); | |
3010 | ||
3011 | /* The interface should exist. */ | |
5895d33f | 3012 | ifp = if_lookup_by_index_per_ns(zebra_ns_lookup(ns_id), |
d62a17ae | 3013 | ndm->ndm_ifindex); |
2853fed6 | 3014 | if (!ifp || !ifp->info) |
d62a17ae | 3015 | return 0; |
3016 | ||
20089ae2 DS |
3017 | zif = (struct zebra_if *)ifp->info; |
3018 | ||
3019 | /* Parse attributes and extract fields of interest. */ | |
0d6f7fd6 | 3020 | memset(tb, 0, sizeof(tb)); |
20089ae2 DS |
3021 | netlink_parse_rtattr(tb, NDA_MAX, NDA_RTA(ndm), len); |
3022 | ||
3023 | if (!tb[NDA_DST]) { | |
9df414fe QY |
3024 | zlog_debug("%s family %s IF %s(%u) - no DST", |
3025 | nl_msg_type_to_str(h->nlmsg_type), | |
3026 | nl_family_to_str(ndm->ndm_family), ifp->name, | |
3027 | ndm->ndm_ifindex); | |
d62a17ae | 3028 | return 0; |
20089ae2 DS |
3029 | } |
3030 | ||
3031 | memset(&ip, 0, sizeof(struct ipaddr)); | |
3032 | ip.ipa_type = (ndm->ndm_family == AF_INET) ? IPADDR_V4 : IPADDR_V6; | |
3033 | memcpy(&ip.ip.addr, RTA_DATA(tb[NDA_DST]), RTA_PAYLOAD(tb[NDA_DST])); | |
3034 | ||
f17b99ed DS |
3035 | /* if kernel deletes our rfc5549 neighbor entry, re-install it */ |
3036 | if (h->nlmsg_type == RTM_DELNEIGH && (ndm->ndm_state & NUD_PERMANENT)) { | |
9b036974 | 3037 | netlink_handle_5549(ndm, zif, ifp, &ip, false); |
28bd0652 DS |
3038 | if (IS_ZEBRA_DEBUG_KERNEL) |
3039 | zlog_debug( | |
3040 | "\tNeighbor Entry Received is a 5549 entry, finished"); | |
20089ae2 DS |
3041 | return 0; |
3042 | } | |
d62a17ae | 3043 | |
f17b99ed | 3044 | /* if kernel marks our rfc5549 neighbor entry invalid, re-install it */ |
9b036974 DS |
3045 | if (h->nlmsg_type == RTM_NEWNEIGH && !(ndm->ndm_state & NUD_VALID)) |
3046 | netlink_handle_5549(ndm, zif, ifp, &ip, true); | |
f17b99ed | 3047 | |
d62a17ae | 3048 | /* The neighbor is present on an SVI. From this, we locate the |
3049 | * underlying | |
3050 | * bridge because we're only interested in neighbors on a VxLAN bridge. | |
3051 | * The bridge is located based on the nature of the SVI: | |
3052 | * (a) In the case of a VLAN-aware bridge, the SVI is a L3 VLAN | |
3053 | * interface | |
3054 | * and is linked to the bridge | |
3055 | * (b) In the case of a VLAN-unaware bridge, the SVI is the bridge | |
3056 | * inteface | |
3057 | * itself | |
3058 | */ | |
3059 | if (IS_ZEBRA_IF_VLAN(ifp)) { | |
5895d33f | 3060 | link_if = if_lookup_by_index_per_ns(zebra_ns_lookup(ns_id), |
71349e03 | 3061 | zif->link_ifindex); |
d62a17ae | 3062 | if (!link_if) |
3063 | return 0; | |
3064 | } else if (IS_ZEBRA_IF_BRIDGE(ifp)) | |
3065 | link_if = ifp; | |
28bd0652 DS |
3066 | else { |
3067 | if (IS_ZEBRA_DEBUG_KERNEL) | |
3068 | zlog_debug( | |
3069 | "\tNeighbor Entry received is not on a VLAN or a BRIDGE, ignoring"); | |
d62a17ae | 3070 | return 0; |
28bd0652 | 3071 | } |
d62a17ae | 3072 | |
d62a17ae | 3073 | memset(&mac, 0, sizeof(struct ethaddr)); |
d62a17ae | 3074 | if (h->nlmsg_type == RTM_NEWNEIGH) { |
3075 | if (tb[NDA_LLADDR]) { | |
ff8b7eb8 | 3076 | if (RTA_PAYLOAD(tb[NDA_LLADDR]) != ETH_ALEN) { |
28bd0652 DS |
3077 | if (IS_ZEBRA_DEBUG_KERNEL) |
3078 | zlog_debug( | |
3079 | "%s family %s IF %s(%u) - LLADDR is not MAC, len %lu", | |
3080 | nl_msg_type_to_str( | |
3081 | h->nlmsg_type), | |
3082 | nl_family_to_str( | |
3083 | ndm->ndm_family), | |
3084 | ifp->name, ndm->ndm_ifindex, | |
3085 | (unsigned long)RTA_PAYLOAD( | |
3086 | tb[NDA_LLADDR])); | |
d62a17ae | 3087 | return 0; |
3088 | } | |
3089 | ||
3090 | mac_present = 1; | |
ff8b7eb8 | 3091 | memcpy(&mac, RTA_DATA(tb[NDA_LLADDR]), ETH_ALEN); |
d62a17ae | 3092 | } |
3093 | ||
a37f4598 | 3094 | is_ext = !!(ndm->ndm_flags & NTF_EXT_LEARNED); |
3095 | is_router = !!(ndm->ndm_flags & NTF_ROUTER); | |
d62a17ae | 3096 | |
3097 | if (IS_ZEBRA_DEBUG_KERNEL) | |
3098 | zlog_debug( | |
3099 | "Rx %s family %s IF %s(%u) IP %s MAC %s state 0x%x flags 0x%x", | |
3100 | nl_msg_type_to_str(h->nlmsg_type), | |
3101 | nl_family_to_str(ndm->ndm_family), ifp->name, | |
3102 | ndm->ndm_ifindex, | |
3103 | ipaddr2str(&ip, buf2, sizeof(buf2)), | |
3104 | mac_present | |
3105 | ? prefix_mac2str(&mac, buf, sizeof(buf)) | |
3106 | : "", | |
3107 | ndm->ndm_state, ndm->ndm_flags); | |
3108 | ||
3109 | /* If the neighbor state is valid for use, process as an add or | |
3110 | * update | |
3111 | * else process as a delete. Note that the delete handling may | |
3112 | * result | |
3113 | * in re-adding the neighbor if it is a valid "remote" neighbor. | |
3114 | */ | |
3115 | if (ndm->ndm_state & NUD_VALID) | |
ee69da27 | 3116 | return zebra_vxlan_handle_kernel_neigh_update( |
d62a17ae | 3117 | ifp, link_if, &ip, &mac, ndm->ndm_state, |
a37f4598 | 3118 | is_ext, is_router); |
d62a17ae | 3119 | |
ee69da27 | 3120 | return zebra_vxlan_handle_kernel_neigh_del(ifp, link_if, &ip); |
d62a17ae | 3121 | } |
3122 | ||
3123 | if (IS_ZEBRA_DEBUG_KERNEL) | |
3124 | zlog_debug("Rx %s family %s IF %s(%u) IP %s", | |
3125 | nl_msg_type_to_str(h->nlmsg_type), | |
3126 | nl_family_to_str(ndm->ndm_family), ifp->name, | |
3127 | ndm->ndm_ifindex, | |
3128 | ipaddr2str(&ip, buf2, sizeof(buf2))); | |
3129 | ||
3130 | /* Process the delete - it may result in re-adding the neighbor if it is | |
3131 | * a valid "remote" neighbor. | |
3132 | */ | |
ee69da27 | 3133 | return zebra_vxlan_handle_kernel_neigh_del(ifp, link_if, &ip); |
2232a77c | 3134 | } |
3135 | ||
2414abd3 | 3136 | static int netlink_neigh_table(struct nlmsghdr *h, ns_id_t ns_id, int startup) |
2232a77c | 3137 | { |
d62a17ae | 3138 | int len; |
3139 | struct ndmsg *ndm; | |
2232a77c | 3140 | |
d62a17ae | 3141 | if (h->nlmsg_type != RTM_NEWNEIGH) |
3142 | return 0; | |
2232a77c | 3143 | |
d62a17ae | 3144 | /* Length validity. */ |
3145 | len = h->nlmsg_len - NLMSG_LENGTH(sizeof(struct ndmsg)); | |
3146 | if (len < 0) | |
3147 | return -1; | |
2232a77c | 3148 | |
d62a17ae | 3149 | /* We are interested only in AF_INET or AF_INET6 notifications. */ |
3150 | ndm = NLMSG_DATA(h); | |
3151 | if (ndm->ndm_family != AF_INET && ndm->ndm_family != AF_INET6) | |
3152 | return 0; | |
2232a77c | 3153 | |
2414abd3 | 3154 | return netlink_neigh_change(h, len); |
2232a77c | 3155 | } |
3156 | ||
3157 | /* Request for IP neighbor information from the kernel */ | |
85a75f1e MS |
3158 | static int netlink_request_neigh(struct nlsock *netlink_cmd, int family, |
3159 | int type, ifindex_t ifindex) | |
2232a77c | 3160 | { |
d62a17ae | 3161 | struct { |
3162 | struct nlmsghdr n; | |
3163 | struct ndmsg ndm; | |
3164 | char buf[256]; | |
3165 | } req; | |
3166 | ||
3167 | /* Form the request, specifying filter (rtattr) if needed. */ | |
3168 | memset(&req, 0, sizeof(req)); | |
3169 | req.n.nlmsg_type = type; | |
718f9b0f | 3170 | req.n.nlmsg_flags = NLM_F_ROOT | NLM_F_MATCH | NLM_F_REQUEST; |
d62a17ae | 3171 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)); |
3172 | req.ndm.ndm_family = family; | |
3173 | if (ifindex) | |
3174 | addattr32(&req.n, sizeof(req), NDA_IFINDEX, ifindex); | |
3175 | ||
85a75f1e | 3176 | return netlink_request(netlink_cmd, &req.n); |
2232a77c | 3177 | } |
3178 | ||
3179 | /* | |
3180 | * IP Neighbor table read using netlink interface. This is invoked | |
3181 | * at startup. | |
3182 | */ | |
d62a17ae | 3183 | int netlink_neigh_read(struct zebra_ns *zns) |
2232a77c | 3184 | { |
d62a17ae | 3185 | int ret; |
85a75f1e MS |
3186 | struct zebra_dplane_info dp_info; |
3187 | ||
3188 | zebra_dplane_info_from_zns(&dp_info, zns, true /*is_cmd*/); | |
2232a77c | 3189 | |
d62a17ae | 3190 | /* Get IP neighbor table. */ |
85a75f1e MS |
3191 | ret = netlink_request_neigh(&zns->netlink_cmd, AF_UNSPEC, RTM_GETNEIGH, |
3192 | 0); | |
d62a17ae | 3193 | if (ret < 0) |
3194 | return ret; | |
85a75f1e MS |
3195 | ret = netlink_parse_info(netlink_neigh_table, &zns->netlink_cmd, |
3196 | &dp_info, 0, 1); | |
2232a77c | 3197 | |
d62a17ae | 3198 | return ret; |
2232a77c | 3199 | } |
3200 | ||
3201 | /* | |
3202 | * IP Neighbor table read using netlink interface. This is for a specific | |
3203 | * VLAN device. | |
3204 | */ | |
d62a17ae | 3205 | int netlink_neigh_read_for_vlan(struct zebra_ns *zns, struct interface *vlan_if) |
2232a77c | 3206 | { |
d62a17ae | 3207 | int ret = 0; |
85a75f1e MS |
3208 | struct zebra_dplane_info dp_info; |
3209 | ||
3210 | zebra_dplane_info_from_zns(&dp_info, zns, true /*is_cmd*/); | |
2232a77c | 3211 | |
85a75f1e | 3212 | ret = netlink_request_neigh(&zns->netlink_cmd, AF_UNSPEC, RTM_GETNEIGH, |
d62a17ae | 3213 | vlan_if->ifindex); |
3214 | if (ret < 0) | |
3215 | return ret; | |
85a75f1e MS |
3216 | ret = netlink_parse_info(netlink_neigh_table, &zns->netlink_cmd, |
3217 | &dp_info, 0, 0); | |
2232a77c | 3218 | |
d62a17ae | 3219 | return ret; |
2232a77c | 3220 | } |
3221 | ||
67fb9374 CS |
3222 | /* |
3223 | * Request for a specific IP in VLAN (SVI) device from IP Neighbor table, | |
3224 | * read using netlink interface. | |
3225 | */ | |
3226 | static int netlink_request_specific_neigh_in_vlan(struct zebra_ns *zns, | |
3227 | int type, struct ipaddr *ip, | |
3228 | ifindex_t ifindex) | |
3229 | { | |
3230 | struct { | |
3231 | struct nlmsghdr n; | |
3232 | struct ndmsg ndm; | |
3233 | char buf[256]; | |
3234 | } req; | |
3235 | int ipa_len; | |
3236 | ||
3237 | /* Form the request, specifying filter (rtattr) if needed. */ | |
3238 | memset(&req, 0, sizeof(req)); | |
3239 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)); | |
3240 | req.n.nlmsg_flags = NLM_F_REQUEST; | |
3241 | req.n.nlmsg_type = type; /* RTM_GETNEIGH */ | |
3242 | req.ndm.ndm_ifindex = ifindex; | |
3243 | ||
3244 | if (IS_IPADDR_V4(ip)) { | |
3245 | ipa_len = IPV4_MAX_BYTELEN; | |
3246 | req.ndm.ndm_family = AF_INET; | |
3247 | ||
3248 | } else { | |
3249 | ipa_len = IPV6_MAX_BYTELEN; | |
3250 | req.ndm.ndm_family = AF_INET6; | |
3251 | } | |
3252 | ||
3253 | addattr_l(&req.n, sizeof(req), NDA_DST, &ip->ip.addr, ipa_len); | |
3254 | ||
7c26c121 CS |
3255 | if (IS_ZEBRA_DEBUG_KERNEL) { |
3256 | char buf[INET6_ADDRSTRLEN]; | |
3257 | ||
3258 | zlog_debug("%s: Tx %s family %s IF %u IP %s flags 0x%x", | |
3259 | __func__, nl_msg_type_to_str(type), | |
3260 | nl_family_to_str(req.ndm.ndm_family), ifindex, | |
3261 | ipaddr2str(ip, buf, sizeof(buf)), req.n.nlmsg_flags); | |
3262 | } | |
3263 | ||
67fb9374 CS |
3264 | return netlink_request(&zns->netlink_cmd, &req.n); |
3265 | } | |
3266 | ||
3267 | int netlink_neigh_read_specific_ip(struct ipaddr *ip, | |
3268 | struct interface *vlan_if) | |
3269 | { | |
3270 | int ret = 0; | |
3271 | struct zebra_ns *zns; | |
3272 | struct zebra_vrf *zvrf = zebra_vrf_lookup_by_id(vlan_if->vrf_id); | |
3273 | char buf[INET6_ADDRSTRLEN]; | |
3274 | struct zebra_dplane_info dp_info; | |
3275 | ||
3276 | zns = zvrf->zns; | |
3277 | ||
3278 | zebra_dplane_info_from_zns(&dp_info, zns, true /*is_cmd*/); | |
3279 | ||
3280 | if (IS_ZEBRA_DEBUG_KERNEL) | |
3281 | zlog_debug("%s: neigh request IF %s(%u) IP %s vrf_id %u", | |
15569c58 DA |
3282 | __func__, vlan_if->name, vlan_if->ifindex, |
3283 | ipaddr2str(ip, buf, sizeof(buf)), vlan_if->vrf_id); | |
67fb9374 CS |
3284 | |
3285 | ret = netlink_request_specific_neigh_in_vlan(zns, RTM_GETNEIGH, ip, | |
3286 | vlan_if->ifindex); | |
3287 | if (ret < 0) | |
3288 | return ret; | |
3289 | ||
3290 | ret = netlink_parse_info(netlink_neigh_table, &zns->netlink_cmd, | |
3291 | &dp_info, 1, 0); | |
3292 | ||
3293 | return ret; | |
3294 | } | |
3295 | ||
2414abd3 | 3296 | int netlink_neigh_change(struct nlmsghdr *h, ns_id_t ns_id) |
2232a77c | 3297 | { |
d62a17ae | 3298 | int len; |
3299 | struct ndmsg *ndm; | |
2232a77c | 3300 | |
d62a17ae | 3301 | if (!(h->nlmsg_type == RTM_NEWNEIGH || h->nlmsg_type == RTM_DELNEIGH)) |
3302 | return 0; | |
2232a77c | 3303 | |
d62a17ae | 3304 | /* Length validity. */ |
3305 | len = h->nlmsg_len - NLMSG_LENGTH(sizeof(struct ndmsg)); | |
9bdf8618 | 3306 | if (len < 0) { |
15569c58 DA |
3307 | zlog_err( |
3308 | "%s: Message received from netlink is of a broken size %d %zu", | |
3309 | __func__, h->nlmsg_len, | |
3310 | (size_t)NLMSG_LENGTH(sizeof(struct ndmsg))); | |
d62a17ae | 3311 | return -1; |
9bdf8618 | 3312 | } |
2232a77c | 3313 | |
d62a17ae | 3314 | /* Is this a notification for the MAC FDB or IP neighbor table? */ |
3315 | ndm = NLMSG_DATA(h); | |
3316 | if (ndm->ndm_family == AF_BRIDGE) | |
2414abd3 | 3317 | return netlink_macfdb_change(h, len, ns_id); |
2232a77c | 3318 | |
d62a17ae | 3319 | if (ndm->ndm_type != RTN_UNICAST) |
3320 | return 0; | |
2232a77c | 3321 | |
d62a17ae | 3322 | if (ndm->ndm_family == AF_INET || ndm->ndm_family == AF_INET6) |
2414abd3 | 3323 | return netlink_ipneigh_change(h, len, ns_id); |
8a1b681c | 3324 | else { |
9df414fe | 3325 | flog_warn( |
e914ccbe | 3326 | EC_ZEBRA_UNKNOWN_FAMILY, |
87b5d1b0 DS |
3327 | "Invalid address family: %u received from kernel neighbor change: %s", |
3328 | ndm->ndm_family, nl_msg_type_to_str(h->nlmsg_type)); | |
8a1b681c SW |
3329 | return 0; |
3330 | } | |
2232a77c | 3331 | |
d62a17ae | 3332 | return 0; |
2232a77c | 3333 | } |
3334 | ||
931fa60c MS |
3335 | /* |
3336 | * Utility neighbor-update function, using info from dplane context. | |
3337 | */ | |
3338 | static int netlink_neigh_update_ctx(const struct zebra_dplane_ctx *ctx, | |
3339 | int cmd) | |
2232a77c | 3340 | { |
f3dbec60 | 3341 | uint8_t protocol = RTPROT_ZEBRA; |
d62a17ae | 3342 | struct { |
3343 | struct nlmsghdr n; | |
3344 | struct ndmsg ndm; | |
3345 | char buf[256]; | |
3346 | } req; | |
3347 | int ipa_len; | |
d62a17ae | 3348 | char buf[INET6_ADDRSTRLEN]; |
3349 | char buf2[ETHER_ADDR_STRLEN]; | |
931fa60c MS |
3350 | const struct ipaddr *ip; |
3351 | const struct ethaddr *mac; | |
3352 | uint8_t flags; | |
3353 | uint16_t state; | |
d62a17ae | 3354 | |
5605ecfc | 3355 | memset(&req, 0, sizeof(req)); |
d62a17ae | 3356 | |
931fa60c MS |
3357 | ip = dplane_ctx_neigh_get_ipaddr(ctx); |
3358 | mac = dplane_ctx_neigh_get_mac(ctx); | |
3359 | if (is_zero_mac(mac)) | |
3360 | mac = NULL; | |
3361 | ||
3362 | flags = neigh_flags_to_netlink(dplane_ctx_neigh_get_flags(ctx)); | |
3363 | state = neigh_state_to_netlink(dplane_ctx_neigh_get_state(ctx)); | |
3364 | ||
d62a17ae | 3365 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)); |
3366 | req.n.nlmsg_flags = NLM_F_REQUEST; | |
3367 | if (cmd == RTM_NEWNEIGH) | |
3368 | req.n.nlmsg_flags |= (NLM_F_CREATE | NLM_F_REPLACE); | |
3369 | req.n.nlmsg_type = cmd; // RTM_NEWNEIGH or RTM_DELNEIGH | |
3370 | req.ndm.ndm_family = IS_IPADDR_V4(ip) ? AF_INET : AF_INET6; | |
68e33151 | 3371 | req.ndm.ndm_state = state; |
931fa60c | 3372 | req.ndm.ndm_ifindex = dplane_ctx_get_ifindex(ctx); |
d62a17ae | 3373 | req.ndm.ndm_type = RTN_UNICAST; |
68e33151 | 3374 | req.ndm.ndm_flags = flags; |
d62a17ae | 3375 | |
f3dbec60 DS |
3376 | addattr_l(&req.n, sizeof(req), |
3377 | NDA_PROTOCOL, &protocol, sizeof(protocol)); | |
d62a17ae | 3378 | ipa_len = IS_IPADDR_V4(ip) ? IPV4_MAX_BYTELEN : IPV6_MAX_BYTELEN; |
3379 | addattr_l(&req.n, sizeof(req), NDA_DST, &ip->ip.addr, ipa_len); | |
3380 | if (mac) | |
3381 | addattr_l(&req.n, sizeof(req), NDA_LLADDR, mac, 6); | |
3382 | ||
3383 | if (IS_ZEBRA_DEBUG_KERNEL) | |
6fe2b0e6 | 3384 | zlog_debug("Tx %s family %s IF %s(%u) Neigh %s MAC %s flags 0x%x state 0x%x", |
d62a17ae | 3385 | nl_msg_type_to_str(cmd), |
931fa60c MS |
3386 | nl_family_to_str(req.ndm.ndm_family), |
3387 | dplane_ctx_get_ifname(ctx), | |
3388 | dplane_ctx_get_ifindex(ctx), | |
3389 | ipaddr2str(ip, buf, sizeof(buf)), | |
d62a17ae | 3390 | mac ? prefix_mac2str(mac, buf2, sizeof(buf2)) |
931fa60c MS |
3391 | : "null", |
3392 | flags, state); | |
d62a17ae | 3393 | |
931fa60c MS |
3394 | return netlink_talk_info(netlink_talk_filter, &req.n, |
3395 | dplane_ctx_get_ns(ctx), 0); | |
2232a77c | 3396 | } |
3397 | ||
036d93c0 MS |
3398 | /* |
3399 | * Update MAC, using dataplane context object. | |
3400 | */ | |
3401 | enum zebra_dplane_result kernel_mac_update_ctx(struct zebra_dplane_ctx *ctx) | |
2232a77c | 3402 | { |
036d93c0 | 3403 | return netlink_macfdb_update_ctx(ctx); |
2232a77c | 3404 | } |
3405 | ||
931fa60c | 3406 | enum zebra_dplane_result kernel_neigh_update_ctx(struct zebra_dplane_ctx *ctx) |
2232a77c | 3407 | { |
931fa60c | 3408 | int ret = -1; |
2232a77c | 3409 | |
931fa60c MS |
3410 | switch (dplane_ctx_get_op(ctx)) { |
3411 | case DPLANE_OP_NEIGH_INSTALL: | |
3412 | case DPLANE_OP_NEIGH_UPDATE: | |
3413 | ret = netlink_neigh_update_ctx(ctx, RTM_NEWNEIGH); | |
3414 | break; | |
3415 | case DPLANE_OP_NEIGH_DELETE: | |
3416 | ret = netlink_neigh_update_ctx(ctx, RTM_DELNEIGH); | |
3417 | break; | |
0bbd4ff4 MS |
3418 | case DPLANE_OP_VTEP_ADD: |
3419 | ret = netlink_vxlan_flood_update_ctx(ctx, RTM_NEWNEIGH); | |
3420 | break; | |
3421 | case DPLANE_OP_VTEP_DELETE: | |
3422 | ret = netlink_vxlan_flood_update_ctx(ctx, RTM_DELNEIGH); | |
3423 | break; | |
931fa60c MS |
3424 | default: |
3425 | break; | |
3426 | } | |
2232a77c | 3427 | |
931fa60c MS |
3428 | return (ret == 0 ? |
3429 | ZEBRA_DPLANE_REQUEST_SUCCESS : ZEBRA_DPLANE_REQUEST_FAILURE); | |
6fe2b0e6 CS |
3430 | } |
3431 | ||
16c628de MS |
3432 | /* |
3433 | * MPLS label forwarding table change via netlink interface, using dataplane | |
3434 | * context information. | |
3435 | */ | |
fc608372 | 3436 | int netlink_mpls_multipath(int cmd, struct zebra_dplane_ctx *ctx) |
16c628de MS |
3437 | { |
3438 | mpls_lse_t lse; | |
81793ac1 | 3439 | const zebra_nhlfe_t *nhlfe; |
16c628de MS |
3440 | struct nexthop *nexthop = NULL; |
3441 | unsigned int nexthop_num; | |
3442 | const char *routedesc; | |
3443 | int route_type; | |
9a0132a5 | 3444 | struct prefix p = {0}; |
16c628de MS |
3445 | |
3446 | struct { | |
3447 | struct nlmsghdr n; | |
3448 | struct rtmsg r; | |
3449 | char buf[NL_PKT_BUF_SIZE]; | |
3450 | } req; | |
3451 | ||
3452 | memset(&req, 0, sizeof(req) - NL_PKT_BUF_SIZE); | |
3453 | ||
3454 | /* | |
3455 | * Count # nexthops so we can decide whether to use singlepath | |
3456 | * or multipath case. | |
3457 | */ | |
3458 | nexthop_num = 0; | |
3459 | for (nhlfe = dplane_ctx_get_nhlfe(ctx); nhlfe; nhlfe = nhlfe->next) { | |
3460 | nexthop = nhlfe->nexthop; | |
3461 | if (!nexthop) | |
3462 | continue; | |
3463 | if (cmd == RTM_NEWROUTE) { | |
3464 | /* Count all selected NHLFEs */ | |
3465 | if (CHECK_FLAG(nhlfe->flags, NHLFE_FLAG_SELECTED) | |
3466 | && CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE)) | |
3467 | nexthop_num++; | |
3468 | } else { /* DEL */ | |
3469 | /* Count all installed NHLFEs */ | |
3470 | if (CHECK_FLAG(nhlfe->flags, NHLFE_FLAG_INSTALLED) | |
3471 | && CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB)) | |
3472 | nexthop_num++; | |
3473 | } | |
3474 | } | |
3475 | ||
3476 | if ((nexthop_num == 0) || | |
3477 | (!dplane_ctx_get_best_nhlfe(ctx) && (cmd != RTM_DELROUTE))) | |
3478 | return 0; | |
3479 | ||
3480 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)); | |
3481 | req.n.nlmsg_flags = NLM_F_CREATE | NLM_F_REQUEST; | |
3482 | req.n.nlmsg_type = cmd; | |
3483 | req.n.nlmsg_pid = dplane_ctx_get_ns(ctx)->nls.snl.nl_pid; | |
3484 | ||
3485 | req.r.rtm_family = AF_MPLS; | |
3486 | req.r.rtm_table = RT_TABLE_MAIN; | |
3487 | req.r.rtm_dst_len = MPLS_LABEL_LEN_BITS; | |
3488 | req.r.rtm_scope = RT_SCOPE_UNIVERSE; | |
3489 | req.r.rtm_type = RTN_UNICAST; | |
3490 | ||
3491 | if (cmd == RTM_NEWROUTE) { | |
3492 | /* We do a replace to handle update. */ | |
3493 | req.n.nlmsg_flags |= NLM_F_REPLACE; | |
3494 | ||
3495 | /* set the protocol value if installing */ | |
3496 | route_type = re_type_from_lsp_type( | |
3497 | dplane_ctx_get_best_nhlfe(ctx)->type); | |
3498 | req.r.rtm_protocol = zebra2proto(route_type); | |
3499 | } | |
3500 | ||
3501 | /* Fill destination */ | |
3502 | lse = mpls_lse_encode(dplane_ctx_get_in_label(ctx), 0, 0, 1); | |
3503 | addattr_l(&req.n, sizeof(req), RTA_DST, &lse, sizeof(mpls_lse_t)); | |
3504 | ||
3505 | /* Fill nexthops (paths) based on single-path or multipath. The paths | |
3506 | * chosen depend on the operation. | |
3507 | */ | |
fc608372 | 3508 | if (nexthop_num == 1) { |
16c628de MS |
3509 | routedesc = "single-path"; |
3510 | _netlink_mpls_debug(cmd, dplane_ctx_get_in_label(ctx), | |
3511 | routedesc); | |
3512 | ||
3513 | nexthop_num = 0; | |
3514 | for (nhlfe = dplane_ctx_get_nhlfe(ctx); | |
3515 | nhlfe; nhlfe = nhlfe->next) { | |
3516 | nexthop = nhlfe->nexthop; | |
3517 | if (!nexthop) | |
3518 | continue; | |
3519 | ||
3520 | if ((cmd == RTM_NEWROUTE | |
3521 | && (CHECK_FLAG(nhlfe->flags, NHLFE_FLAG_SELECTED) | |
3522 | && CHECK_FLAG(nexthop->flags, | |
3523 | NEXTHOP_FLAG_ACTIVE))) | |
3524 | || (cmd == RTM_DELROUTE | |
3525 | && (CHECK_FLAG(nhlfe->flags, | |
3526 | NHLFE_FLAG_INSTALLED) | |
3527 | && CHECK_FLAG(nexthop->flags, | |
3528 | NEXTHOP_FLAG_FIB)))) { | |
3529 | /* Add the gateway */ | |
3530 | _netlink_mpls_build_singlepath( | |
9a0132a5 | 3531 | &p, routedesc, nhlfe, &req.n, &req.r, |
16c628de MS |
3532 | sizeof(req), cmd); |
3533 | ||
3534 | nexthop_num++; | |
3535 | break; | |
3536 | } | |
3537 | } | |
3538 | } else { /* Multipath case */ | |
3539 | char buf[NL_PKT_BUF_SIZE]; | |
3540 | struct rtattr *rta = (void *)buf; | |
3541 | struct rtnexthop *rtnh; | |
81793ac1 | 3542 | const union g_addr *src1 = NULL; |
16c628de MS |
3543 | |
3544 | rta->rta_type = RTA_MULTIPATH; | |
3545 | rta->rta_len = RTA_LENGTH(0); | |
3546 | rtnh = RTA_DATA(rta); | |
3547 | ||
3548 | routedesc = "multipath"; | |
3549 | _netlink_mpls_debug(cmd, dplane_ctx_get_in_label(ctx), | |
3550 | routedesc); | |
3551 | ||
3552 | nexthop_num = 0; | |
3553 | for (nhlfe = dplane_ctx_get_nhlfe(ctx); | |
3554 | nhlfe; nhlfe = nhlfe->next) { | |
3555 | nexthop = nhlfe->nexthop; | |
3556 | if (!nexthop) | |
3557 | continue; | |
3558 | ||
16c628de MS |
3559 | if ((cmd == RTM_NEWROUTE |
3560 | && (CHECK_FLAG(nhlfe->flags, NHLFE_FLAG_SELECTED) | |
3561 | && CHECK_FLAG(nexthop->flags, | |
3562 | NEXTHOP_FLAG_ACTIVE))) | |
3563 | || (cmd == RTM_DELROUTE | |
3564 | && (CHECK_FLAG(nhlfe->flags, | |
3565 | NHLFE_FLAG_INSTALLED) | |
3566 | && CHECK_FLAG(nexthop->flags, | |
3567 | NEXTHOP_FLAG_FIB)))) { | |
3568 | nexthop_num++; | |
3569 | ||
3570 | /* Build the multipath */ | |
9a0132a5 DS |
3571 | _netlink_mpls_build_multipath(&p, routedesc, |
3572 | nhlfe, rta, rtnh, | |
3573 | &req.r, &src1); | |
16c628de MS |
3574 | rtnh = RTNH_NEXT(rtnh); |
3575 | } | |
3576 | } | |
3577 | ||
3578 | /* Add the multipath */ | |
3579 | if (rta->rta_len > RTA_LENGTH(0)) | |
3580 | addattr_l(&req.n, NL_PKT_BUF_SIZE, RTA_MULTIPATH, | |
3581 | RTA_DATA(rta), RTA_PAYLOAD(rta)); | |
3582 | } | |
3583 | ||
3584 | /* Talk to netlink socket. */ | |
3585 | return netlink_talk_info(netlink_talk_filter, &req.n, | |
3586 | dplane_ctx_get_ns(ctx), 0); | |
3587 | } | |
ddfeb486 | 3588 | #endif /* HAVE_NETLINK */ |