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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 | ||
8689b25a HS |
25 | /* The following definition is to workaround an issue in the Linux kernel |
26 | * header files with redefinition of 'struct in6_addr' in both | |
27 | * netinet/in.h and linux/in6.h. | |
28 | * Reference - https://sourceware.org/ml/libc-alpha/2013-01/msg00599.html | |
29 | */ | |
30 | #define _LINUX_IN6_H | |
31 | ||
8ccc7e80 | 32 | #include <net/if_arp.h> |
ba777396 RW |
33 | #include <linux/lwtunnel.h> |
34 | #include <linux/mpls_iptunnel.h> | |
8689b25a HS |
35 | #include <linux/seg6_iptunnel.h> |
36 | #include <linux/seg6_local.h> | |
ba777396 RW |
37 | #include <linux/neighbour.h> |
38 | #include <linux/rtnetlink.h> | |
d9f5b2f5 | 39 | #include <linux/nexthop.h> |
718e3744 | 40 | |
41 | /* Hack for GNU libc version 2. */ | |
42 | #ifndef MSG_TRUNC | |
43 | #define MSG_TRUNC 0x20 | |
44 | #endif /* MSG_TRUNC */ | |
45 | ||
46 | #include "linklist.h" | |
47 | #include "if.h" | |
48 | #include "log.h" | |
49 | #include "prefix.h" | |
8689b25a HS |
50 | #include "plist.h" |
51 | #include "plist_int.h" | |
718e3744 | 52 | #include "connected.h" |
53 | #include "table.h" | |
26e2ae36 | 54 | #include "memory.h" |
718e3744 | 55 | #include "rib.h" |
e04ab74d | 56 | #include "thread.h" |
edd7c245 | 57 | #include "privs.h" |
fb018d25 | 58 | #include "nexthop.h" |
78104b9b | 59 | #include "vrf.h" |
5e6a74d8 | 60 | #include "vty.h" |
40c7bdb0 | 61 | #include "mpls.h" |
13d60d35 | 62 | #include "vxlan.h" |
8d03bc50 | 63 | #include "printfrr.h" |
718e3744 | 64 | |
bf094f69 | 65 | #include "zebra/zapi_msg.h" |
fe18ee2d | 66 | #include "zebra/zebra_ns.h" |
7c551956 | 67 | #include "zebra/zebra_vrf.h" |
6621ca86 | 68 | #include "zebra/rt.h" |
718e3744 | 69 | #include "zebra/redistribute.h" |
70 | #include "zebra/interface.h" | |
71 | #include "zebra/debug.h" | |
12f6fb97 | 72 | #include "zebra/rtadv.h" |
567b877d | 73 | #include "zebra/zebra_ptm.h" |
40c7bdb0 | 74 | #include "zebra/zebra_mpls.h" |
1fdc9eae | 75 | #include "zebra/kernel_netlink.h" |
76 | #include "zebra/rt_netlink.h" | |
d9f5b2f5 | 77 | #include "zebra/zebra_nhg.h" |
e3be0432 | 78 | #include "zebra/zebra_mroute.h" |
2232a77c | 79 | #include "zebra/zebra_vxlan.h" |
364fed6b | 80 | #include "zebra/zebra_errors.h" |
506efd37 | 81 | #include "zebra/zebra_evpn_mh.h" |
1d80c209 | 82 | #include "zebra/zebra_trace.h" |
4cf4fad1 | 83 | #include "zebra/zebra_neigh.h" |
e3be0432 | 84 | |
40c7bdb0 | 85 | #ifndef AF_MPLS |
86 | #define AF_MPLS 28 | |
87 | #endif | |
88 | ||
d87ed8d7 AK |
89 | /* Re-defining as I am unable to include <linux/if_bridge.h> which has the |
90 | * UAPI for MAC sync. */ | |
91 | #ifndef _UAPI_LINUX_IF_BRIDGE_H | |
4bcdb608 | 92 | #define BR_SPH_LIST_SIZE 10 |
d87ed8d7 AK |
93 | #endif |
94 | ||
2232a77c | 95 | static vlanid_t filter_vlan = 0; |
96 | ||
7c99d51b MS |
97 | /* We capture whether the current kernel supports nexthop ids; by |
98 | * default, we'll use them if possible. There's also a configuration | |
99 | * available to _disable_ use of kernel nexthops. | |
100 | */ | |
fec211ad | 101 | static bool supports_nh; |
81505946 | 102 | |
d62a17ae | 103 | struct gw_family_t { |
d7c0a89a QY |
104 | uint16_t filler; |
105 | uint16_t family; | |
d62a17ae | 106 | union g_addr gate; |
40c7bdb0 | 107 | }; |
108 | ||
2b64873d DL |
109 | static const char ipv4_ll_buf[16] = "169.254.0.1"; |
110 | static struct in_addr ipv4_ll; | |
8755598a | 111 | |
002e5c43 SW |
112 | /* Is this a ipv4 over ipv6 route? */ |
113 | static bool is_route_v4_over_v6(unsigned char rtm_family, | |
114 | enum nexthop_types_t nexthop_type) | |
115 | { | |
116 | if (rtm_family == AF_INET | |
117 | && (nexthop_type == NEXTHOP_TYPE_IPV6 | |
118 | || nexthop_type == NEXTHOP_TYPE_IPV6_IFINDEX)) | |
119 | return true; | |
120 | ||
121 | return false; | |
122 | } | |
123 | ||
7c99d51b MS |
124 | /* Helper to control use of kernel-level nexthop ids */ |
125 | static bool kernel_nexthops_supported(void) | |
126 | { | |
d982012a SW |
127 | return (supports_nh && !vrf_is_backend_netns() |
128 | && zebra_nhg_kernel_nexthops_enabled()); | |
7c99d51b MS |
129 | } |
130 | ||
6c67f41f SW |
131 | /* |
132 | * Some people may only want to use NHGs created by protos and not | |
133 | * implicitly created by Zebra. This check accounts for that. | |
134 | */ | |
135 | static bool proto_nexthops_only(void) | |
136 | { | |
137 | return zebra_nhg_proto_nexthops_only(); | |
138 | } | |
139 | ||
140 | /* Is this a proto created NHG? */ | |
141 | static bool is_proto_nhg(uint32_t id, int type) | |
142 | { | |
143 | /* If type is available, use it as the source of truth */ | |
144 | if (type) { | |
145 | if (type != ZEBRA_ROUTE_NHG) | |
146 | return true; | |
147 | return false; | |
148 | } | |
149 | ||
54c89c93 | 150 | if (id >= ZEBRA_NHG_PROTO_LOWER) |
6c67f41f SW |
151 | return true; |
152 | ||
153 | return false; | |
154 | } | |
155 | ||
784d88aa SR |
156 | /* Is vni mcast group */ |
157 | static bool is_mac_vni_mcast_group(struct ethaddr *mac, vni_t vni, | |
158 | struct in_addr grp_addr) | |
159 | { | |
160 | if (!vni) | |
161 | return false; | |
162 | ||
163 | if (!is_zero_mac(mac)) | |
164 | return false; | |
165 | ||
166 | if (!IN_MULTICAST(ntohl(grp_addr.s_addr))) | |
167 | return false; | |
168 | ||
169 | return true; | |
170 | } | |
171 | ||
8755598a DS |
172 | /* |
173 | * The ipv4_ll data structure is used for all 5549 | |
174 | * additions to the kernel. Let's figure out the | |
175 | * correct value one time instead for every | |
176 | * install/remove of a 5549 type route | |
177 | */ | |
d62a17ae | 178 | void rt_netlink_init(void) |
8755598a | 179 | { |
d62a17ae | 180 | inet_pton(AF_INET, ipv4_ll_buf, &ipv4_ll); |
8755598a DS |
181 | } |
182 | ||
931fa60c MS |
183 | /* |
184 | * Mapping from dataplane neighbor flags to netlink flags | |
185 | */ | |
186 | static uint8_t neigh_flags_to_netlink(uint8_t dplane_flags) | |
187 | { | |
188 | uint8_t flags = 0; | |
189 | ||
190 | if (dplane_flags & DPLANE_NTF_EXT_LEARNED) | |
191 | flags |= NTF_EXT_LEARNED; | |
192 | if (dplane_flags & DPLANE_NTF_ROUTER) | |
193 | flags |= NTF_ROUTER; | |
d68e74b4 JU |
194 | if (dplane_flags & DPLANE_NTF_USE) |
195 | flags |= NTF_USE; | |
931fa60c MS |
196 | |
197 | return flags; | |
198 | } | |
199 | ||
200 | /* | |
201 | * Mapping from dataplane neighbor state to netlink state | |
202 | */ | |
203 | static uint16_t neigh_state_to_netlink(uint16_t dplane_state) | |
204 | { | |
205 | uint16_t state = 0; | |
206 | ||
207 | if (dplane_state & DPLANE_NUD_REACHABLE) | |
208 | state |= NUD_REACHABLE; | |
209 | if (dplane_state & DPLANE_NUD_STALE) | |
210 | state |= NUD_STALE; | |
211 | if (dplane_state & DPLANE_NUD_NOARP) | |
212 | state |= NUD_NOARP; | |
213 | if (dplane_state & DPLANE_NUD_PROBE) | |
214 | state |= NUD_PROBE; | |
d68e74b4 JU |
215 | if (dplane_state & DPLANE_NUD_INCOMPLETE) |
216 | state |= NUD_INCOMPLETE; | |
0a27a2fe PG |
217 | if (dplane_state & DPLANE_NUD_PERMANENT) |
218 | state |= NUD_PERMANENT; | |
219 | if (dplane_state & DPLANE_NUD_FAILED) | |
220 | state |= NUD_FAILED; | |
931fa60c MS |
221 | |
222 | return state; | |
223 | } | |
224 | ||
225 | ||
6a6d11a3 | 226 | static inline bool is_selfroute(int proto) |
23b1f334 | 227 | { |
d62a17ae | 228 | if ((proto == RTPROT_BGP) || (proto == RTPROT_OSPF) |
d4d71f11 | 229 | || (proto == RTPROT_ZSTATIC) || (proto == RTPROT_ZEBRA) |
d62a17ae | 230 | || (proto == RTPROT_ISIS) || (proto == RTPROT_RIPNG) |
231 | || (proto == RTPROT_NHRP) || (proto == RTPROT_EIGRP) | |
915902cb | 232 | || (proto == RTPROT_LDP) || (proto == RTPROT_BABEL) |
0761368a | 233 | || (proto == RTPROT_RIP) || (proto == RTPROT_SHARP) |
31f937fb SM |
234 | || (proto == RTPROT_PBR) || (proto == RTPROT_OPENFABRIC) |
235 | || (proto == RTPROT_SRTE)) { | |
6a6d11a3 | 236 | return true; |
d62a17ae | 237 | } |
238 | ||
6a6d11a3 | 239 | return false; |
23b1f334 DD |
240 | } |
241 | ||
4a563f27 | 242 | int zebra2proto(int proto) |
23b1f334 | 243 | { |
d62a17ae | 244 | switch (proto) { |
245 | case ZEBRA_ROUTE_BABEL: | |
246 | proto = RTPROT_BABEL; | |
247 | break; | |
248 | case ZEBRA_ROUTE_BGP: | |
249 | proto = RTPROT_BGP; | |
250 | break; | |
251 | case ZEBRA_ROUTE_OSPF: | |
252 | case ZEBRA_ROUTE_OSPF6: | |
253 | proto = RTPROT_OSPF; | |
254 | break; | |
255 | case ZEBRA_ROUTE_STATIC: | |
d4d71f11 | 256 | proto = RTPROT_ZSTATIC; |
d62a17ae | 257 | break; |
258 | case ZEBRA_ROUTE_ISIS: | |
259 | proto = RTPROT_ISIS; | |
260 | break; | |
261 | case ZEBRA_ROUTE_RIP: | |
262 | proto = RTPROT_RIP; | |
263 | break; | |
264 | case ZEBRA_ROUTE_RIPNG: | |
265 | proto = RTPROT_RIPNG; | |
266 | break; | |
267 | case ZEBRA_ROUTE_NHRP: | |
268 | proto = RTPROT_NHRP; | |
269 | break; | |
270 | case ZEBRA_ROUTE_EIGRP: | |
271 | proto = RTPROT_EIGRP; | |
272 | break; | |
273 | case ZEBRA_ROUTE_LDP: | |
274 | proto = RTPROT_LDP; | |
275 | break; | |
8a71d93d DS |
276 | case ZEBRA_ROUTE_SHARP: |
277 | proto = RTPROT_SHARP; | |
278 | break; | |
0761368a DS |
279 | case ZEBRA_ROUTE_PBR: |
280 | proto = RTPROT_PBR; | |
281 | break; | |
da82f6b4 CF |
282 | case ZEBRA_ROUTE_OPENFABRIC: |
283 | proto = RTPROT_OPENFABRIC; | |
284 | break; | |
31f937fb SM |
285 | case ZEBRA_ROUTE_SRTE: |
286 | proto = RTPROT_SRTE; | |
287 | break; | |
a56ec5c0 | 288 | case ZEBRA_ROUTE_TABLE: |
38e40db1 | 289 | case ZEBRA_ROUTE_NHG: |
a56ec5c0 DS |
290 | proto = RTPROT_ZEBRA; |
291 | break; | |
911d4d48 DE |
292 | case ZEBRA_ROUTE_CONNECT: |
293 | case ZEBRA_ROUTE_KERNEL: | |
294 | proto = RTPROT_KERNEL; | |
295 | break; | |
d62a17ae | 296 | default: |
0761368a DS |
297 | /* |
298 | * When a user adds a new protocol this will show up | |
299 | * to let them know to do something about it. This | |
300 | * is intentionally a warn because we should see | |
301 | * this as part of development of a new protocol | |
302 | */ | |
9df414fe QY |
303 | zlog_debug( |
304 | "%s: Please add this protocol(%d) to proper rt_netlink.c handling", | |
15569c58 | 305 | __func__, proto); |
d62a17ae | 306 | proto = RTPROT_ZEBRA; |
307 | break; | |
308 | } | |
309 | ||
310 | return proto; | |
23b1f334 DD |
311 | } |
312 | ||
38e40db1 | 313 | static inline int proto2zebra(int proto, int family, bool is_nexthop) |
915902cb DS |
314 | { |
315 | switch (proto) { | |
316 | case RTPROT_BABEL: | |
317 | proto = ZEBRA_ROUTE_BABEL; | |
318 | break; | |
319 | case RTPROT_BGP: | |
320 | proto = ZEBRA_ROUTE_BGP; | |
321 | break; | |
322 | case RTPROT_OSPF: | |
d6816f68 DS |
323 | proto = (family == AF_INET) ? ZEBRA_ROUTE_OSPF |
324 | : ZEBRA_ROUTE_OSPF6; | |
915902cb DS |
325 | break; |
326 | case RTPROT_ISIS: | |
327 | proto = ZEBRA_ROUTE_ISIS; | |
328 | break; | |
329 | case RTPROT_RIP: | |
330 | proto = ZEBRA_ROUTE_RIP; | |
331 | break; | |
332 | case RTPROT_RIPNG: | |
333 | proto = ZEBRA_ROUTE_RIPNG; | |
334 | break; | |
335 | case RTPROT_NHRP: | |
336 | proto = ZEBRA_ROUTE_NHRP; | |
337 | break; | |
338 | case RTPROT_EIGRP: | |
339 | proto = ZEBRA_ROUTE_EIGRP; | |
340 | break; | |
341 | case RTPROT_LDP: | |
342 | proto = ZEBRA_ROUTE_LDP; | |
343 | break; | |
344 | case RTPROT_STATIC: | |
d4d71f11 | 345 | case RTPROT_ZSTATIC: |
915902cb DS |
346 | proto = ZEBRA_ROUTE_STATIC; |
347 | break; | |
0761368a DS |
348 | case RTPROT_SHARP: |
349 | proto = ZEBRA_ROUTE_SHARP; | |
350 | break; | |
351 | case RTPROT_PBR: | |
352 | proto = ZEBRA_ROUTE_PBR; | |
353 | break; | |
da82f6b4 CF |
354 | case RTPROT_OPENFABRIC: |
355 | proto = ZEBRA_ROUTE_OPENFABRIC; | |
356 | break; | |
31f937fb SM |
357 | case RTPROT_SRTE: |
358 | proto = ZEBRA_ROUTE_SRTE; | |
359 | break; | |
b09388f0 DS |
360 | case RTPROT_UNSPEC: |
361 | case RTPROT_REDIRECT: | |
362 | case RTPROT_KERNEL: | |
363 | case RTPROT_BOOT: | |
364 | case RTPROT_GATED: | |
365 | case RTPROT_RA: | |
366 | case RTPROT_MRT: | |
367 | case RTPROT_BIRD: | |
368 | case RTPROT_DNROUTED: | |
369 | case RTPROT_XORP: | |
370 | case RTPROT_NTK: | |
371 | case RTPROT_MROUTED: | |
372 | case RTPROT_KEEPALIVED: | |
373 | case RTPROT_OPENR: | |
374 | proto = ZEBRA_ROUTE_KERNEL; | |
375 | break; | |
38e40db1 SW |
376 | case RTPROT_ZEBRA: |
377 | if (is_nexthop) { | |
378 | proto = ZEBRA_ROUTE_NHG; | |
379 | break; | |
380 | } | |
381 | /* Intentional fall thru */ | |
915902cb | 382 | default: |
0761368a DS |
383 | /* |
384 | * When a user adds a new protocol this will show up | |
385 | * to let them know to do something about it. This | |
386 | * is intentionally a warn because we should see | |
387 | * this as part of development of a new protocol | |
388 | */ | |
9df414fe QY |
389 | zlog_debug( |
390 | "%s: Please add this protocol(%d) to proper rt_netlink.c handling", | |
15569c58 | 391 | __func__, proto); |
915902cb DS |
392 | proto = ZEBRA_ROUTE_KERNEL; |
393 | break; | |
394 | } | |
395 | return proto; | |
396 | } | |
397 | ||
12f6fb97 DS |
398 | /* |
399 | Pending: create an efficient table_id (in a tree/hash) based lookup) | |
400 | */ | |
9d866c07 | 401 | vrf_id_t vrf_lookup_by_table(uint32_t table_id, ns_id_t ns_id) |
12f6fb97 | 402 | { |
d62a17ae | 403 | struct vrf *vrf; |
404 | struct zebra_vrf *zvrf; | |
12f6fb97 | 405 | |
a2addae8 | 406 | RB_FOREACH (vrf, vrf_id_head, &vrfs_by_id) { |
78dd30b2 PG |
407 | zvrf = vrf->info; |
408 | if (zvrf == NULL) | |
d62a17ae | 409 | continue; |
78dd30b2 PG |
410 | /* case vrf with netns : match the netnsid */ |
411 | if (vrf_is_backend_netns()) { | |
412 | if (ns_id == zvrf_id(zvrf)) | |
413 | return zvrf_id(zvrf); | |
414 | } else { | |
415 | /* VRF is VRF_BACKEND_VRF_LITE */ | |
416 | if (zvrf->table_id != table_id) | |
417 | continue; | |
418 | return zvrf_id(zvrf); | |
419 | } | |
d62a17ae | 420 | } |
12f6fb97 | 421 | |
d62a17ae | 422 | return VRF_DEFAULT; |
12f6fb97 DS |
423 | } |
424 | ||
87da6a60 SW |
425 | /** |
426 | * @parse_encap_mpls() - Parses encapsulated mpls attributes | |
427 | * @tb: Pointer to rtattr to look for nested items in. | |
428 | * @labels: Pointer to store labels in. | |
429 | * | |
430 | * Return: Number of mpls labels found. | |
431 | */ | |
432 | static int parse_encap_mpls(struct rtattr *tb, mpls_label_t *labels) | |
433 | { | |
434 | struct rtattr *tb_encap[MPLS_IPTUNNEL_MAX + 1] = {0}; | |
435 | mpls_lse_t *lses = NULL; | |
436 | int num_labels = 0; | |
437 | uint32_t ttl = 0; | |
438 | uint32_t bos = 0; | |
439 | uint32_t exp = 0; | |
440 | mpls_label_t label = 0; | |
441 | ||
442 | netlink_parse_rtattr_nested(tb_encap, MPLS_IPTUNNEL_MAX, tb); | |
443 | lses = (mpls_lse_t *)RTA_DATA(tb_encap[MPLS_IPTUNNEL_DST]); | |
444 | while (!bos && num_labels < MPLS_MAX_LABELS) { | |
445 | mpls_lse_decode(lses[num_labels], &label, &ttl, &exp, &bos); | |
446 | labels[num_labels++] = label; | |
447 | } | |
448 | ||
449 | return num_labels; | |
450 | } | |
451 | ||
d49e6c4a HS |
452 | static enum seg6local_action_t |
453 | parse_encap_seg6local(struct rtattr *tb, | |
454 | struct seg6local_context *ctx) | |
455 | { | |
ce39ca16 | 456 | struct rtattr *tb_encap[SEG6_LOCAL_MAX + 1] = {}; |
d49e6c4a HS |
457 | enum seg6local_action_t act = ZEBRA_SEG6_LOCAL_ACTION_UNSPEC; |
458 | ||
ce39ca16 | 459 | netlink_parse_rtattr_nested(tb_encap, SEG6_LOCAL_MAX, tb); |
d49e6c4a HS |
460 | |
461 | if (tb_encap[SEG6_LOCAL_ACTION]) | |
462 | act = *(uint32_t *)RTA_DATA(tb_encap[SEG6_LOCAL_ACTION]); | |
463 | ||
464 | if (tb_encap[SEG6_LOCAL_NH4]) | |
465 | ctx->nh4 = *(struct in_addr *)RTA_DATA( | |
466 | tb_encap[SEG6_LOCAL_NH4]); | |
467 | ||
468 | if (tb_encap[SEG6_LOCAL_NH6]) | |
469 | ctx->nh6 = *(struct in6_addr *)RTA_DATA( | |
470 | tb_encap[SEG6_LOCAL_NH6]); | |
471 | ||
472 | if (tb_encap[SEG6_LOCAL_TABLE]) | |
473 | ctx->table = *(uint32_t *)RTA_DATA(tb_encap[SEG6_LOCAL_TABLE]); | |
474 | ||
7eab60a7 RS |
475 | if (tb_encap[SEG6_LOCAL_VRFTABLE]) |
476 | ctx->table = | |
477 | *(uint32_t *)RTA_DATA(tb_encap[SEG6_LOCAL_VRFTABLE]); | |
478 | ||
d49e6c4a HS |
479 | return act; |
480 | } | |
481 | ||
f16de90b HS |
482 | static int parse_encap_seg6(struct rtattr *tb, struct in6_addr *segs) |
483 | { | |
ce39ca16 | 484 | struct rtattr *tb_encap[SEG6_IPTUNNEL_MAX + 1] = {}; |
f16de90b HS |
485 | struct seg6_iptunnel_encap *ipt = NULL; |
486 | struct in6_addr *segments = NULL; | |
487 | ||
ce39ca16 | 488 | netlink_parse_rtattr_nested(tb_encap, SEG6_IPTUNNEL_MAX, tb); |
f16de90b HS |
489 | |
490 | /* | |
491 | * TODO: It's not support multiple SID list. | |
492 | */ | |
493 | if (tb_encap[SEG6_IPTUNNEL_SRH]) { | |
494 | ipt = (struct seg6_iptunnel_encap *) | |
495 | RTA_DATA(tb_encap[SEG6_IPTUNNEL_SRH]); | |
496 | segments = ipt->srh[0].segments; | |
497 | *segs = segments[0]; | |
498 | return 1; | |
499 | } | |
500 | ||
501 | return 0; | |
502 | } | |
503 | ||
504 | ||
77a44d94 SW |
505 | static struct nexthop |
506 | parse_nexthop_unicast(ns_id_t ns_id, struct rtmsg *rtm, struct rtattr **tb, | |
507 | enum blackhole_type bh_type, int index, void *prefsrc, | |
20822f9d | 508 | void *gate, afi_t afi, vrf_id_t vrf_id) |
77a44d94 SW |
509 | { |
510 | struct interface *ifp = NULL; | |
511 | struct nexthop nh = {0}; | |
512 | mpls_label_t labels[MPLS_MAX_LABELS] = {0}; | |
513 | int num_labels = 0; | |
b9596f13 | 514 | enum seg6local_action_t seg6l_act = ZEBRA_SEG6_LOCAL_ACTION_UNSPEC; |
1bda3e62 HS |
515 | struct seg6local_context seg6l_ctx = {}; |
516 | struct in6_addr seg6_segs = {}; | |
f16de90b | 517 | int num_segs = 0; |
77a44d94 | 518 | |
20822f9d | 519 | vrf_id_t nh_vrf_id = vrf_id; |
77a44d94 SW |
520 | size_t sz = (afi == AFI_IP) ? 4 : 16; |
521 | ||
522 | if (bh_type == BLACKHOLE_UNSPEC) { | |
523 | if (index && !gate) | |
524 | nh.type = NEXTHOP_TYPE_IFINDEX; | |
525 | else if (index && gate) | |
526 | nh.type = (afi == AFI_IP) ? NEXTHOP_TYPE_IPV4_IFINDEX | |
527 | : NEXTHOP_TYPE_IPV6_IFINDEX; | |
528 | else if (!index && gate) | |
529 | nh.type = (afi == AFI_IP) ? NEXTHOP_TYPE_IPV4 | |
530 | : NEXTHOP_TYPE_IPV6; | |
531 | else { | |
532 | nh.type = NEXTHOP_TYPE_BLACKHOLE; | |
533 | nh.bh_type = bh_type; | |
534 | } | |
535 | } else { | |
536 | nh.type = NEXTHOP_TYPE_BLACKHOLE; | |
537 | nh.bh_type = bh_type; | |
538 | } | |
539 | nh.ifindex = index; | |
540 | if (prefsrc) | |
541 | memcpy(&nh.src, prefsrc, sz); | |
542 | if (gate) | |
543 | memcpy(&nh.gate, gate, sz); | |
544 | ||
545 | if (index) { | |
546 | ifp = if_lookup_by_index_per_ns(zebra_ns_lookup(ns_id), index); | |
547 | if (ifp) | |
096f7609 | 548 | nh_vrf_id = ifp->vrf->vrf_id; |
77a44d94 SW |
549 | } |
550 | nh.vrf_id = nh_vrf_id; | |
551 | ||
552 | if (tb[RTA_ENCAP] && tb[RTA_ENCAP_TYPE] | |
553 | && *(uint16_t *)RTA_DATA(tb[RTA_ENCAP_TYPE]) | |
554 | == LWTUNNEL_ENCAP_MPLS) { | |
555 | num_labels = parse_encap_mpls(tb[RTA_ENCAP], labels); | |
556 | } | |
d49e6c4a HS |
557 | if (tb[RTA_ENCAP] && tb[RTA_ENCAP_TYPE] |
558 | && *(uint16_t *)RTA_DATA(tb[RTA_ENCAP_TYPE]) | |
559 | == LWTUNNEL_ENCAP_SEG6_LOCAL) { | |
560 | seg6l_act = parse_encap_seg6local(tb[RTA_ENCAP], &seg6l_ctx); | |
561 | } | |
f16de90b HS |
562 | if (tb[RTA_ENCAP] && tb[RTA_ENCAP_TYPE] |
563 | && *(uint16_t *)RTA_DATA(tb[RTA_ENCAP_TYPE]) | |
564 | == LWTUNNEL_ENCAP_SEG6) { | |
565 | num_segs = parse_encap_seg6(tb[RTA_ENCAP], &seg6_segs); | |
566 | } | |
77a44d94 SW |
567 | |
568 | if (rtm->rtm_flags & RTNH_F_ONLINK) | |
569 | SET_FLAG(nh.flags, NEXTHOP_FLAG_ONLINK); | |
570 | ||
c704cb44 DS |
571 | if (rtm->rtm_flags & RTNH_F_LINKDOWN) |
572 | SET_FLAG(nh.flags, NEXTHOP_FLAG_LINKDOWN); | |
573 | ||
77a44d94 SW |
574 | if (num_labels) |
575 | nexthop_add_labels(&nh, ZEBRA_LSP_STATIC, num_labels, labels); | |
576 | ||
d49e6c4a | 577 | if (seg6l_act != ZEBRA_SEG6_LOCAL_ACTION_UNSPEC) |
eab0f8f0 | 578 | nexthop_add_srv6_seg6local(&nh, seg6l_act, &seg6l_ctx); |
d49e6c4a | 579 | |
f16de90b | 580 | if (num_segs) |
eab0f8f0 | 581 | nexthop_add_srv6_seg6(&nh, &seg6_segs); |
f16de90b | 582 | |
77a44d94 SW |
583 | return nh; |
584 | } | |
585 | ||
20822f9d | 586 | static uint8_t parse_multipath_nexthops_unicast(ns_id_t ns_id, |
0eb97b86 | 587 | struct nexthop_group *ng, |
20822f9d SW |
588 | struct rtmsg *rtm, |
589 | struct rtnexthop *rtnh, | |
590 | struct rtattr **tb, | |
591 | void *prefsrc, vrf_id_t vrf_id) | |
592 | { | |
593 | void *gate = NULL; | |
594 | struct interface *ifp = NULL; | |
595 | int index = 0; | |
596 | /* MPLS labels */ | |
597 | mpls_label_t labels[MPLS_MAX_LABELS] = {0}; | |
598 | int num_labels = 0; | |
b9596f13 | 599 | enum seg6local_action_t seg6l_act = ZEBRA_SEG6_LOCAL_ACTION_UNSPEC; |
1bda3e62 HS |
600 | struct seg6local_context seg6l_ctx = {}; |
601 | struct in6_addr seg6_segs = {}; | |
f16de90b | 602 | int num_segs = 0; |
20822f9d SW |
603 | struct rtattr *rtnh_tb[RTA_MAX + 1] = {}; |
604 | ||
605 | int len = RTA_PAYLOAD(tb[RTA_MULTIPATH]); | |
606 | vrf_id_t nh_vrf_id = vrf_id; | |
607 | ||
20822f9d SW |
608 | for (;;) { |
609 | struct nexthop *nh = NULL; | |
610 | ||
611 | if (len < (int)sizeof(*rtnh) || rtnh->rtnh_len > len) | |
612 | break; | |
613 | ||
614 | index = rtnh->rtnh_ifindex; | |
615 | if (index) { | |
616 | /* | |
617 | * Yes we are looking this up | |
618 | * for every nexthop and just | |
619 | * using the last one looked | |
620 | * up right now | |
621 | */ | |
622 | ifp = if_lookup_by_index_per_ns(zebra_ns_lookup(ns_id), | |
623 | index); | |
624 | if (ifp) | |
096f7609 | 625 | nh_vrf_id = ifp->vrf->vrf_id; |
20822f9d SW |
626 | else { |
627 | flog_warn( | |
628 | EC_ZEBRA_UNKNOWN_INTERFACE, | |
629 | "%s: Unknown interface %u specified, defaulting to VRF_DEFAULT", | |
15569c58 | 630 | __func__, index); |
20822f9d SW |
631 | nh_vrf_id = VRF_DEFAULT; |
632 | } | |
633 | } else | |
634 | nh_vrf_id = vrf_id; | |
635 | ||
636 | if (rtnh->rtnh_len > sizeof(*rtnh)) { | |
20822f9d SW |
637 | netlink_parse_rtattr(rtnh_tb, RTA_MAX, RTNH_DATA(rtnh), |
638 | rtnh->rtnh_len - sizeof(*rtnh)); | |
639 | if (rtnh_tb[RTA_GATEWAY]) | |
640 | gate = RTA_DATA(rtnh_tb[RTA_GATEWAY]); | |
641 | if (rtnh_tb[RTA_ENCAP] && rtnh_tb[RTA_ENCAP_TYPE] | |
642 | && *(uint16_t *)RTA_DATA(rtnh_tb[RTA_ENCAP_TYPE]) | |
643 | == LWTUNNEL_ENCAP_MPLS) { | |
644 | num_labels = parse_encap_mpls( | |
645 | rtnh_tb[RTA_ENCAP], labels); | |
646 | } | |
d49e6c4a HS |
647 | if (rtnh_tb[RTA_ENCAP] && rtnh_tb[RTA_ENCAP_TYPE] |
648 | && *(uint16_t *)RTA_DATA(rtnh_tb[RTA_ENCAP_TYPE]) | |
649 | == LWTUNNEL_ENCAP_SEG6_LOCAL) { | |
650 | seg6l_act = parse_encap_seg6local( | |
651 | rtnh_tb[RTA_ENCAP], &seg6l_ctx); | |
652 | } | |
f16de90b HS |
653 | if (rtnh_tb[RTA_ENCAP] && rtnh_tb[RTA_ENCAP_TYPE] |
654 | && *(uint16_t *)RTA_DATA(rtnh_tb[RTA_ENCAP_TYPE]) | |
655 | == LWTUNNEL_ENCAP_SEG6) { | |
656 | num_segs = parse_encap_seg6(rtnh_tb[RTA_ENCAP], | |
657 | &seg6_segs); | |
658 | } | |
20822f9d SW |
659 | } |
660 | ||
f3354e16 SW |
661 | if (gate && rtm->rtm_family == AF_INET) { |
662 | if (index) | |
0eb97b86 MS |
663 | nh = nexthop_from_ipv4_ifindex( |
664 | gate, prefsrc, index, nh_vrf_id); | |
f3354e16 | 665 | else |
0eb97b86 MS |
666 | nh = nexthop_from_ipv4(gate, prefsrc, |
667 | nh_vrf_id); | |
f3354e16 SW |
668 | } else if (gate && rtm->rtm_family == AF_INET6) { |
669 | if (index) | |
0eb97b86 MS |
670 | nh = nexthop_from_ipv6_ifindex( |
671 | gate, index, nh_vrf_id); | |
f3354e16 | 672 | else |
0eb97b86 | 673 | nh = nexthop_from_ipv6(gate, nh_vrf_id); |
20822f9d | 674 | } else |
0eb97b86 | 675 | nh = nexthop_from_ifindex(index, nh_vrf_id); |
20822f9d SW |
676 | |
677 | if (nh) { | |
df7fb580 DS |
678 | nh->weight = rtnh->rtnh_hops + 1; |
679 | ||
20822f9d SW |
680 | if (num_labels) |
681 | nexthop_add_labels(nh, ZEBRA_LSP_STATIC, | |
682 | num_labels, labels); | |
683 | ||
d49e6c4a | 684 | if (seg6l_act != ZEBRA_SEG6_LOCAL_ACTION_UNSPEC) |
eab0f8f0 HS |
685 | nexthop_add_srv6_seg6local(nh, seg6l_act, |
686 | &seg6l_ctx); | |
d49e6c4a | 687 | |
f16de90b | 688 | if (num_segs) |
eab0f8f0 | 689 | nexthop_add_srv6_seg6(nh, &seg6_segs); |
f16de90b | 690 | |
20822f9d SW |
691 | if (rtnh->rtnh_flags & RTNH_F_ONLINK) |
692 | SET_FLAG(nh->flags, NEXTHOP_FLAG_ONLINK); | |
0eb97b86 MS |
693 | |
694 | /* Add to temporary list */ | |
695 | nexthop_group_add_sorted(ng, nh); | |
20822f9d SW |
696 | } |
697 | ||
698 | if (rtnh->rtnh_len == 0) | |
699 | break; | |
700 | ||
701 | len -= NLMSG_ALIGN(rtnh->rtnh_len); | |
702 | rtnh = RTNH_NEXT(rtnh); | |
703 | } | |
704 | ||
0eb97b86 | 705 | uint8_t nhop_num = nexthop_group_nexthop_num(ng); |
20822f9d SW |
706 | |
707 | return nhop_num; | |
708 | } | |
709 | ||
718e3744 | 710 | /* Looking up routing table by netlink interface. */ |
45f0a10b DS |
711 | int netlink_route_change_read_unicast_internal(struct nlmsghdr *h, |
712 | ns_id_t ns_id, int startup, | |
713 | struct zebra_dplane_ctx *ctx) | |
718e3744 | 714 | { |
d62a17ae | 715 | int len; |
716 | struct rtmsg *rtm; | |
717 | struct rtattr *tb[RTA_MAX + 1]; | |
acde7f6b | 718 | uint32_t flags = 0; |
d62a17ae | 719 | struct prefix p; |
792fa92e | 720 | struct prefix_ipv6 src_p = {}; |
78dd30b2 | 721 | vrf_id_t vrf_id; |
6a6d11a3 | 722 | bool selfroute; |
d62a17ae | 723 | |
724 | char anyaddr[16] = {0}; | |
725 | ||
915902cb | 726 | int proto = ZEBRA_ROUTE_KERNEL; |
d62a17ae | 727 | int index = 0; |
728 | int table; | |
729 | int metric = 0; | |
d7c0a89a | 730 | uint32_t mtu = 0; |
25715c7e | 731 | uint8_t distance = 0; |
4e40b6d6 | 732 | route_tag_t tag = 0; |
fcc89a9c | 733 | uint32_t nhe_id = 0; |
d62a17ae | 734 | |
735 | void *dest = NULL; | |
736 | void *gate = NULL; | |
737 | void *prefsrc = NULL; /* IPv4 preferred source host address */ | |
738 | void *src = NULL; /* IPv6 srcdest source prefix */ | |
e655a03c | 739 | enum blackhole_type bh_type = BLACKHOLE_UNSPEC; |
d62a17ae | 740 | |
3cee2135 DS |
741 | frrtrace(3, frr_zebra, netlink_route_change_read_unicast, h, ns_id, |
742 | startup); | |
743 | ||
d62a17ae | 744 | rtm = NLMSG_DATA(h); |
745 | ||
746 | if (startup && h->nlmsg_type != RTM_NEWROUTE) | |
747 | return 0; | |
e655a03c DL |
748 | switch (rtm->rtm_type) { |
749 | case RTN_UNICAST: | |
750 | break; | |
751 | case RTN_BLACKHOLE: | |
752 | bh_type = BLACKHOLE_NULL; | |
753 | break; | |
754 | case RTN_UNREACHABLE: | |
755 | bh_type = BLACKHOLE_REJECT; | |
756 | break; | |
757 | case RTN_PROHIBIT: | |
758 | bh_type = BLACKHOLE_ADMINPROHIB; | |
759 | break; | |
760 | default: | |
8c8f250b DS |
761 | if (IS_ZEBRA_DEBUG_KERNEL) |
762 | zlog_debug("Route rtm_type: %s(%d) intentionally ignoring", | |
763 | nl_rttype_to_str(rtm->rtm_type), | |
764 | rtm->rtm_type); | |
d62a17ae | 765 | return 0; |
e655a03c | 766 | } |
d62a17ae | 767 | |
768 | len = h->nlmsg_len - NLMSG_LENGTH(sizeof(struct rtmsg)); | |
9bdf8618 | 769 | if (len < 0) { |
15569c58 DA |
770 | zlog_err( |
771 | "%s: Message received from netlink is of a broken size %d %zu", | |
772 | __func__, h->nlmsg_len, | |
773 | (size_t)NLMSG_LENGTH(sizeof(struct rtmsg))); | |
d62a17ae | 774 | return -1; |
9bdf8618 | 775 | } |
d62a17ae | 776 | |
d62a17ae | 777 | netlink_parse_rtattr(tb, RTA_MAX, RTM_RTA(rtm), len); |
778 | ||
779 | if (rtm->rtm_flags & RTM_F_CLONED) | |
780 | return 0; | |
781 | if (rtm->rtm_protocol == RTPROT_REDIRECT) | |
782 | return 0; | |
783 | if (rtm->rtm_protocol == RTPROT_KERNEL) | |
784 | return 0; | |
785 | ||
6a6d11a3 NN |
786 | selfroute = is_selfroute(rtm->rtm_protocol); |
787 | ||
45f0a10b DS |
788 | if (!startup && selfroute && h->nlmsg_type == RTM_NEWROUTE && |
789 | !zrouter.asic_offloaded && !ctx) { | |
6ab5222f DS |
790 | if (IS_ZEBRA_DEBUG_KERNEL) |
791 | zlog_debug("Route type: %d Received that we think we have originated, ignoring", | |
792 | rtm->rtm_protocol); | |
d62a17ae | 793 | return 0; |
6ab5222f | 794 | } |
d62a17ae | 795 | |
796 | /* We don't care about change notifications for the MPLS table. */ | |
797 | /* TODO: Revisit this. */ | |
798 | if (rtm->rtm_family == AF_MPLS) | |
799 | return 0; | |
800 | ||
801 | /* Table corresponding to route. */ | |
802 | if (tb[RTA_TABLE]) | |
803 | table = *(int *)RTA_DATA(tb[RTA_TABLE]); | |
804 | else | |
805 | table = rtm->rtm_table; | |
806 | ||
807 | /* Map to VRF */ | |
78dd30b2 | 808 | vrf_id = vrf_lookup_by_table(table, ns_id); |
d62a17ae | 809 | if (vrf_id == VRF_DEFAULT) { |
810 | if (!is_zebra_valid_kernel_table(table) | |
811 | && !is_zebra_main_routing_table(table)) | |
812 | return 0; | |
813 | } | |
814 | ||
5a3cf853 DS |
815 | if (rtm->rtm_flags & RTM_F_TRAP) |
816 | flags |= ZEBRA_FLAG_TRAPPED; | |
817 | if (rtm->rtm_flags & RTM_F_OFFLOAD) | |
818 | flags |= ZEBRA_FLAG_OFFLOADED; | |
0d32fbee DS |
819 | if (rtm->rtm_flags & RTM_F_OFFLOAD_FAILED) |
820 | flags |= ZEBRA_FLAG_OFFLOAD_FAILED; | |
5a3cf853 | 821 | |
a048d523 DS |
822 | if (h->nlmsg_flags & NLM_F_APPEND) |
823 | flags |= ZEBRA_FLAG_OUTOFSYNC; | |
824 | ||
d62a17ae | 825 | /* Route which inserted by Zebra. */ |
6a6d11a3 | 826 | if (selfroute) { |
d62a17ae | 827 | flags |= ZEBRA_FLAG_SELFROUTE; |
38e40db1 | 828 | proto = proto2zebra(rtm->rtm_protocol, rtm->rtm_family, false); |
915902cb | 829 | } |
d62a17ae | 830 | if (tb[RTA_OIF]) |
831 | index = *(int *)RTA_DATA(tb[RTA_OIF]); | |
832 | ||
833 | if (tb[RTA_DST]) | |
834 | dest = RTA_DATA(tb[RTA_DST]); | |
835 | else | |
836 | dest = anyaddr; | |
837 | ||
838 | if (tb[RTA_SRC]) | |
839 | src = RTA_DATA(tb[RTA_SRC]); | |
840 | else | |
841 | src = anyaddr; | |
842 | ||
843 | if (tb[RTA_PREFSRC]) | |
844 | prefsrc = RTA_DATA(tb[RTA_PREFSRC]); | |
845 | ||
846 | if (tb[RTA_GATEWAY]) | |
847 | gate = RTA_DATA(tb[RTA_GATEWAY]); | |
848 | ||
fcc89a9c SW |
849 | if (tb[RTA_NH_ID]) |
850 | nhe_id = *(uint32_t *)RTA_DATA(tb[RTA_NH_ID]); | |
851 | ||
f19435a8 DS |
852 | if (tb[RTA_PRIORITY]) |
853 | metric = *(int *)RTA_DATA(tb[RTA_PRIORITY]); | |
d62a17ae | 854 | |
4e40b6d6 KK |
855 | #if defined(SUPPORT_REALMS) |
856 | if (tb[RTA_FLOW]) | |
857 | tag = *(uint32_t *)RTA_DATA(tb[RTA_FLOW]); | |
858 | #endif | |
859 | ||
f19435a8 DS |
860 | if (tb[RTA_METRICS]) { |
861 | struct rtattr *mxrta[RTAX_MAX + 1]; | |
d62a17ae | 862 | |
996c9314 | 863 | netlink_parse_rtattr(mxrta, RTAX_MAX, RTA_DATA(tb[RTA_METRICS]), |
f19435a8 | 864 | RTA_PAYLOAD(tb[RTA_METRICS])); |
d62a17ae | 865 | |
f19435a8 | 866 | if (mxrta[RTAX_MTU]) |
d7c0a89a | 867 | mtu = *(uint32_t *)RTA_DATA(mxrta[RTAX_MTU]); |
d62a17ae | 868 | } |
869 | ||
870 | if (rtm->rtm_family == AF_INET) { | |
871 | p.family = AF_INET; | |
930571d2 | 872 | if (rtm->rtm_dst_len > IPV4_MAX_BITLEN) { |
e17d9b2d | 873 | zlog_err( |
75829703 | 874 | "Invalid destination prefix length: %u received from kernel route change", |
930571d2 | 875 | rtm->rtm_dst_len); |
e17d9b2d | 876 | return -1; |
930571d2 | 877 | } |
d62a17ae | 878 | memcpy(&p.u.prefix4, dest, 4); |
879 | p.prefixlen = rtm->rtm_dst_len; | |
880 | ||
1f610a1f | 881 | if (rtm->rtm_src_len != 0) { |
9df414fe | 882 | flog_warn( |
e914ccbe | 883 | EC_ZEBRA_UNSUPPORTED_V4_SRCDEST, |
2dbe669b DA |
884 | "unsupported IPv4 sourcedest route (dest %pFX vrf %u)", |
885 | &p, vrf_id); | |
1f610a1f CF |
886 | return 0; |
887 | } | |
930571d2 | 888 | |
1f610a1f CF |
889 | /* Force debug below to not display anything for source */ |
890 | src_p.prefixlen = 0; | |
d62a17ae | 891 | } else if (rtm->rtm_family == AF_INET6) { |
892 | p.family = AF_INET6; | |
930571d2 | 893 | if (rtm->rtm_dst_len > IPV6_MAX_BITLEN) { |
e17d9b2d | 894 | zlog_err( |
75829703 | 895 | "Invalid destination prefix length: %u received from kernel route change", |
930571d2 | 896 | rtm->rtm_dst_len); |
e17d9b2d | 897 | return -1; |
930571d2 | 898 | } |
d62a17ae | 899 | memcpy(&p.u.prefix6, dest, 16); |
900 | p.prefixlen = rtm->rtm_dst_len; | |
901 | ||
902 | src_p.family = AF_INET6; | |
930571d2 | 903 | if (rtm->rtm_src_len > IPV6_MAX_BITLEN) { |
e17d9b2d | 904 | zlog_err( |
75829703 | 905 | "Invalid source prefix length: %u received from kernel route change", |
930571d2 | 906 | rtm->rtm_src_len); |
e17d9b2d | 907 | return -1; |
930571d2 | 908 | } |
d62a17ae | 909 | memcpy(&src_p.prefix, src, 16); |
910 | src_p.prefixlen = rtm->rtm_src_len; | |
deb28338 MS |
911 | } else { |
912 | /* We only handle the AFs we handle... */ | |
913 | if (IS_ZEBRA_DEBUG_KERNEL) | |
914 | zlog_debug("%s: unknown address-family %u", __func__, | |
915 | rtm->rtm_family); | |
916 | return 0; | |
d62a17ae | 917 | } |
918 | ||
25715c7e DS |
919 | /* |
920 | * For ZEBRA_ROUTE_KERNEL types: | |
921 | * | |
922 | * The metric/priority of the route received from the kernel | |
923 | * is a 32 bit number. We are going to interpret the high | |
924 | * order byte as the Admin Distance and the low order 3 bytes | |
925 | * as the metric. | |
926 | * | |
927 | * This will allow us to do two things: | |
928 | * 1) Allow the creation of kernel routes that can be | |
929 | * overridden by zebra. | |
930 | * 2) Allow the old behavior for 'most' kernel route types | |
931 | * if a user enters 'ip route ...' v4 routes get a metric | |
932 | * of 0 and v6 routes get a metric of 1024. Both of these | |
933 | * values will end up with a admin distance of 0, which | |
934 | * will cause them to win for the purposes of zebra. | |
935 | */ | |
936 | if (proto == ZEBRA_ROUTE_KERNEL) { | |
937 | distance = (metric >> 24) & 0xFF; | |
996c9314 | 938 | metric = (metric & 0x00FFFFFF); |
25715c7e DS |
939 | } |
940 | ||
d62a17ae | 941 | if (IS_ZEBRA_DEBUG_KERNEL) { |
d62a17ae | 942 | char buf2[PREFIX_STRLEN]; |
2dbe669b | 943 | |
bd47f3a3 | 944 | zlog_debug( |
2dbe669b DA |
945 | "%s %pFX%s%s vrf %s(%u) table_id: %u metric: %d Admin Distance: %d", |
946 | nl_msg_type_to_str(h->nlmsg_type), &p, | |
bd47f3a3 JU |
947 | src_p.prefixlen ? " from " : "", |
948 | src_p.prefixlen ? prefix2str(&src_p, buf2, sizeof(buf2)) | |
949 | : "", | |
950 | vrf_id_to_name(vrf_id), vrf_id, table, metric, | |
951 | distance); | |
d62a17ae | 952 | } |
953 | ||
954 | afi_t afi = AFI_IP; | |
955 | if (rtm->rtm_family == AF_INET6) | |
956 | afi = AFI_IP6; | |
957 | ||
958 | if (h->nlmsg_type == RTM_NEWROUTE) { | |
07fd1f7e DS |
959 | struct route_entry *re; |
960 | struct nexthop_group *ng = NULL; | |
961 | ||
962 | re = zebra_rib_route_entry_new(vrf_id, proto, 0, flags, nhe_id, | |
963 | table, metric, mtu, distance, | |
964 | tag); | |
965 | if (!nhe_id) | |
966 | ng = nexthop_group_new(); | |
8795f904 | 967 | |
fd36be7e | 968 | if (!tb[RTA_MULTIPATH]) { |
07fd1f7e | 969 | struct nexthop *nexthop, nh; |
8795f904 | 970 | |
77a44d94 SW |
971 | if (!nhe_id) { |
972 | nh = parse_nexthop_unicast( | |
973 | ns_id, rtm, tb, bh_type, index, prefsrc, | |
20822f9d | 974 | gate, afi, vrf_id); |
07fd1f7e DS |
975 | |
976 | nexthop = nexthop_new(); | |
977 | *nexthop = nh; | |
978 | nexthop_group_add_sorted(ng, nexthop); | |
87da6a60 | 979 | } |
fd36be7e | 980 | } else { |
d62a17ae | 981 | /* This is a multipath route */ |
d62a17ae | 982 | struct rtnexthop *rtnh = |
983 | (struct rtnexthop *)RTA_DATA(tb[RTA_MULTIPATH]); | |
d62a17ae | 984 | |
20822f9d | 985 | if (!nhe_id) { |
0eb97b86 MS |
986 | uint8_t nhop_num; |
987 | ||
988 | /* Use temporary list of nexthops; parse | |
989 | * message payload's nexthops. | |
990 | */ | |
0eb97b86 | 991 | nhop_num = |
20822f9d | 992 | parse_multipath_nexthops_unicast( |
0eb97b86 | 993 | ns_id, ng, rtm, rtnh, tb, |
20822f9d SW |
994 | prefsrc, vrf_id); |
995 | ||
996 | zserv_nexthop_num_warn( | |
997 | __func__, (const struct prefix *)&p, | |
998 | nhop_num); | |
0eb97b86 MS |
999 | |
1000 | if (nhop_num == 0) { | |
1001 | nexthop_group_delete(&ng); | |
1002 | ng = NULL; | |
1003 | } | |
d62a17ae | 1004 | } |
07fd1f7e | 1005 | } |
478c62e2 | 1006 | if (nhe_id || ng) { |
45f0a10b DS |
1007 | dplane_rib_add_multipath(afi, SAFI_UNICAST, &p, &src_p, |
1008 | re, ng, startup, ctx); | |
478c62e2 DS |
1009 | if (ng) |
1010 | nexthop_group_delete(&ng); | |
1011 | } else { | |
07fd1f7e DS |
1012 | /* |
1013 | * I really don't see how this is possible | |
1014 | * but since we are testing for it let's | |
1015 | * let the end user know why the route | |
1016 | * that was just received was swallowed | |
1017 | * up and forgotten | |
1018 | */ | |
1019 | zlog_err( | |
1020 | "%s: %pFX multipath RTM_NEWROUTE has a invalid nexthop group from the kernel", | |
1021 | __func__, &p); | |
1022 | XFREE(MTYPE_RE, re); | |
d62a17ae | 1023 | } |
1024 | } else { | |
45f0a10b DS |
1025 | if (ctx) { |
1026 | zlog_err( | |
1027 | "%s: %pFX RTM_DELROUTE received but received a context as well", | |
1028 | __func__, &p); | |
1029 | return 0; | |
1030 | } | |
1031 | ||
bc541126 SW |
1032 | if (nhe_id) { |
1033 | rib_delete(afi, SAFI_UNICAST, vrf_id, proto, 0, flags, | |
1034 | &p, &src_p, NULL, nhe_id, table, metric, | |
3ceae22b | 1035 | distance, true); |
bc541126 SW |
1036 | } else { |
1037 | if (!tb[RTA_MULTIPATH]) { | |
1038 | struct nexthop nh; | |
760f39dc HS |
1039 | |
1040 | nh = parse_nexthop_unicast( | |
1041 | ns_id, rtm, tb, bh_type, index, prefsrc, | |
1042 | gate, afi, vrf_id); | |
bc541126 SW |
1043 | rib_delete(afi, SAFI_UNICAST, vrf_id, proto, 0, |
1044 | flags, &p, &src_p, &nh, 0, table, | |
3ceae22b | 1045 | metric, distance, true); |
8ba5bd58 | 1046 | } else { |
bc541126 SW |
1047 | /* XXX: need to compare the entire list of |
1048 | * nexthops here for NLM_F_APPEND stupidity */ | |
1049 | rib_delete(afi, SAFI_UNICAST, vrf_id, proto, 0, | |
1050 | flags, &p, &src_p, NULL, 0, table, | |
3ceae22b | 1051 | metric, distance, true); |
8ba5bd58 | 1052 | } |
d62a17ae | 1053 | } |
1054 | } | |
1055 | ||
45f0a10b DS |
1056 | return 1; |
1057 | } | |
1058 | ||
1059 | static int netlink_route_change_read_unicast(struct nlmsghdr *h, ns_id_t ns_id, | |
1060 | int startup) | |
1061 | { | |
1062 | return netlink_route_change_read_unicast_internal(h, ns_id, startup, | |
1063 | NULL); | |
718e3744 | 1064 | } |
1065 | ||
e3be0432 DS |
1066 | static struct mcast_route_data *mroute = NULL; |
1067 | ||
2414abd3 | 1068 | static int netlink_route_change_read_multicast(struct nlmsghdr *h, |
d62a17ae | 1069 | ns_id_t ns_id, int startup) |
565fdc75 | 1070 | { |
d62a17ae | 1071 | int len; |
1072 | struct rtmsg *rtm; | |
1073 | struct rtattr *tb[RTA_MAX + 1]; | |
1074 | struct mcast_route_data *m; | |
d62a17ae | 1075 | int iif = 0; |
1076 | int count; | |
1077 | int oif[256]; | |
1078 | int oif_count = 0; | |
d62a17ae | 1079 | char oif_list[256] = "\0"; |
78dd30b2 | 1080 | vrf_id_t vrf; |
43b5cc5e | 1081 | int table; |
d62a17ae | 1082 | |
afeb8524 DL |
1083 | assert(mroute); |
1084 | m = mroute; | |
d62a17ae | 1085 | |
1086 | rtm = NLMSG_DATA(h); | |
1087 | ||
1088 | len = h->nlmsg_len - NLMSG_LENGTH(sizeof(struct rtmsg)); | |
1089 | ||
d62a17ae | 1090 | netlink_parse_rtattr(tb, RTA_MAX, RTM_RTA(rtm), len); |
90d82769 | 1091 | |
43b5cc5e DS |
1092 | if (tb[RTA_TABLE]) |
1093 | table = *(int *)RTA_DATA(tb[RTA_TABLE]); | |
1094 | else | |
1095 | table = rtm->rtm_table; | |
1096 | ||
78dd30b2 | 1097 | vrf = vrf_lookup_by_table(table, ns_id); |
43b5cc5e | 1098 | |
d62a17ae | 1099 | if (tb[RTA_IIF]) |
1100 | iif = *(int *)RTA_DATA(tb[RTA_IIF]); | |
1101 | ||
4d3b4b18 MR |
1102 | if (tb[RTA_SRC]) { |
1103 | if (rtm->rtm_family == RTNL_FAMILY_IPMR) | |
1104 | m->src.ipaddr_v4 = | |
1105 | *(struct in_addr *)RTA_DATA(tb[RTA_SRC]); | |
1106 | else | |
1107 | m->src.ipaddr_v6 = | |
1108 | *(struct in6_addr *)RTA_DATA(tb[RTA_SRC]); | |
1109 | } | |
d62a17ae | 1110 | |
4d3b4b18 MR |
1111 | if (tb[RTA_DST]) { |
1112 | if (rtm->rtm_family == RTNL_FAMILY_IPMR) | |
1113 | m->grp.ipaddr_v4 = | |
1114 | *(struct in_addr *)RTA_DATA(tb[RTA_DST]); | |
1115 | else | |
1116 | m->grp.ipaddr_v6 = | |
1117 | *(struct in6_addr *)RTA_DATA(tb[RTA_DST]); | |
1118 | } | |
d62a17ae | 1119 | |
62819462 | 1120 | if (tb[RTA_EXPIRES]) |
d62a17ae | 1121 | m->lastused = *(unsigned long long *)RTA_DATA(tb[RTA_EXPIRES]); |
1122 | ||
1123 | if (tb[RTA_MULTIPATH]) { | |
1124 | struct rtnexthop *rtnh = | |
1125 | (struct rtnexthop *)RTA_DATA(tb[RTA_MULTIPATH]); | |
1126 | ||
1127 | len = RTA_PAYLOAD(tb[RTA_MULTIPATH]); | |
1128 | for (;;) { | |
1129 | if (len < (int)sizeof(*rtnh) || rtnh->rtnh_len > len) | |
1130 | break; | |
1131 | ||
1132 | oif[oif_count] = rtnh->rtnh_ifindex; | |
1133 | oif_count++; | |
1134 | ||
3c04071d SW |
1135 | if (rtnh->rtnh_len == 0) |
1136 | break; | |
1137 | ||
d62a17ae | 1138 | len -= NLMSG_ALIGN(rtnh->rtnh_len); |
1139 | rtnh = RTNH_NEXT(rtnh); | |
1140 | } | |
1141 | } | |
1142 | ||
4d3b4b18 MR |
1143 | if (rtm->rtm_family == RTNL_FAMILY_IPMR) { |
1144 | SET_IPADDR_V4(&m->src); | |
1145 | SET_IPADDR_V4(&m->grp); | |
1146 | } else if (rtm->rtm_family == RTNL_FAMILY_IP6MR) { | |
1147 | SET_IPADDR_V6(&m->src); | |
1148 | SET_IPADDR_V6(&m->grp); | |
1149 | } else { | |
1150 | zlog_warn("%s: Invalid rtm_family received", __func__); | |
1151 | return 0; | |
1152 | } | |
1153 | ||
d62a17ae | 1154 | if (IS_ZEBRA_DEBUG_KERNEL) { |
822c9af2 SW |
1155 | struct interface *ifp = NULL; |
1156 | struct zebra_vrf *zvrf = NULL; | |
1157 | ||
d62a17ae | 1158 | for (count = 0; count < oif_count; count++) { |
1159 | ifp = if_lookup_by_index(oif[count], vrf); | |
1160 | char temp[256]; | |
1161 | ||
772270f3 QY |
1162 | snprintf(temp, sizeof(temp), "%s(%d) ", |
1163 | ifp ? ifp->name : "Unknown", oif[count]); | |
eab4a5c2 | 1164 | strlcat(oif_list, temp, sizeof(oif_list)); |
d62a17ae | 1165 | } |
822c9af2 | 1166 | zvrf = zebra_vrf_lookup_by_id(vrf); |
d62a17ae | 1167 | ifp = if_lookup_by_index(iif, vrf); |
822c9af2 | 1168 | zlog_debug( |
4d3b4b18 | 1169 | "MCAST VRF: %s(%d) %s (%pIA,%pIA) IIF: %s(%d) OIF: %s jiffies: %lld", |
bd47f3a3 | 1170 | zvrf_name(zvrf), vrf, nl_msg_type_to_str(h->nlmsg_type), |
4d3b4b18 MR |
1171 | &m->src, &m->grp, ifp ? ifp->name : "Unknown", iif, |
1172 | oif_list, m->lastused); | |
90d82769 | 1173 | } |
d62a17ae | 1174 | return 0; |
565fdc75 DS |
1175 | } |
1176 | ||
2414abd3 | 1177 | int netlink_route_change(struct nlmsghdr *h, ns_id_t ns_id, int startup) |
565fdc75 | 1178 | { |
d62a17ae | 1179 | int len; |
d62a17ae | 1180 | struct rtmsg *rtm; |
1181 | ||
1182 | rtm = NLMSG_DATA(h); | |
1183 | ||
1184 | if (!(h->nlmsg_type == RTM_NEWROUTE || h->nlmsg_type == RTM_DELROUTE)) { | |
1185 | /* If this is not route add/delete message print warning. */ | |
9165c5f5 | 1186 | zlog_debug("Kernel message: %s NS %u", |
87b5d1b0 | 1187 | nl_msg_type_to_str(h->nlmsg_type), ns_id); |
d62a17ae | 1188 | return 0; |
1189 | } | |
1190 | ||
afeb8524 DL |
1191 | switch (rtm->rtm_family) { |
1192 | case AF_INET: | |
1193 | case AF_INET6: | |
1194 | break; | |
1195 | ||
1196 | case RTNL_FAMILY_IPMR: | |
1197 | case RTNL_FAMILY_IP6MR: | |
1198 | /* notifications on IPMR are irrelevant to zebra, we only care | |
1199 | * about responses to RTM_GETROUTE requests we sent. | |
1200 | */ | |
1201 | return 0; | |
1202 | ||
1203 | default: | |
9df414fe | 1204 | flog_warn( |
e914ccbe | 1205 | EC_ZEBRA_UNKNOWN_FAMILY, |
87b5d1b0 DS |
1206 | "Invalid address family: %u received from kernel route change: %s", |
1207 | rtm->rtm_family, nl_msg_type_to_str(h->nlmsg_type)); | |
8a1b681c SW |
1208 | return 0; |
1209 | } | |
1210 | ||
d62a17ae | 1211 | /* Connected route. */ |
1212 | if (IS_ZEBRA_DEBUG_KERNEL) | |
78dd30b2 | 1213 | zlog_debug("%s %s %s proto %s NS %u", |
d62a17ae | 1214 | nl_msg_type_to_str(h->nlmsg_type), |
1215 | nl_family_to_str(rtm->rtm_family), | |
1216 | nl_rttype_to_str(rtm->rtm_type), | |
78dd30b2 | 1217 | nl_rtproto_to_str(rtm->rtm_protocol), ns_id); |
d62a17ae | 1218 | |
d62a17ae | 1219 | |
1220 | len = h->nlmsg_len - NLMSG_LENGTH(sizeof(struct rtmsg)); | |
9bdf8618 | 1221 | if (len < 0) { |
15569c58 DA |
1222 | zlog_err( |
1223 | "%s: Message received from netlink is of a broken size: %d %zu", | |
1224 | __func__, h->nlmsg_len, | |
1225 | (size_t)NLMSG_LENGTH(sizeof(struct rtmsg))); | |
d62a17ae | 1226 | return -1; |
9bdf8618 | 1227 | } |
d62a17ae | 1228 | |
afeb8524 DL |
1229 | /* these are "magic" kernel-managed *unicast* routes used for |
1230 | * outputting locally generated multicast traffic (which uses unicast | |
1231 | * handling on Linux because ~reasons~. | |
1232 | */ | |
e655a03c | 1233 | if (rtm->rtm_type == RTN_MULTICAST) |
afeb8524 DL |
1234 | return 0; |
1235 | ||
1236 | netlink_route_change_read_unicast(h, ns_id, startup); | |
d62a17ae | 1237 | return 0; |
565fdc75 DS |
1238 | } |
1239 | ||
289602d7 | 1240 | /* Request for specific route information from the kernel */ |
d62a17ae | 1241 | static int netlink_request_route(struct zebra_ns *zns, int family, int type) |
289602d7 | 1242 | { |
d62a17ae | 1243 | struct { |
1244 | struct nlmsghdr n; | |
1245 | struct rtmsg rtm; | |
1246 | } req; | |
1247 | ||
1248 | /* Form the request, specifying filter (rtattr) if needed. */ | |
1249 | memset(&req, 0, sizeof(req)); | |
1250 | req.n.nlmsg_type = type; | |
718f9b0f | 1251 | req.n.nlmsg_flags = NLM_F_ROOT | NLM_F_MATCH | NLM_F_REQUEST; |
d62a17ae | 1252 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)); |
1253 | req.rtm.rtm_family = family; | |
1254 | ||
fd3f8e52 | 1255 | return netlink_request(&zns->netlink_cmd, &req); |
289602d7 | 1256 | } |
1257 | ||
718e3744 | 1258 | /* Routing table read function using netlink interface. Only called |
1259 | bootstrap time. */ | |
d62a17ae | 1260 | int netlink_route_read(struct zebra_ns *zns) |
718e3744 | 1261 | { |
d62a17ae | 1262 | int ret; |
85a75f1e MS |
1263 | struct zebra_dplane_info dp_info; |
1264 | ||
1265 | zebra_dplane_info_from_zns(&dp_info, zns, true /*is_cmd*/); | |
d62a17ae | 1266 | |
1267 | /* Get IPv4 routing table. */ | |
1268 | ret = netlink_request_route(zns, AF_INET, RTM_GETROUTE); | |
1269 | if (ret < 0) | |
1270 | return ret; | |
1271 | ret = netlink_parse_info(netlink_route_change_read_unicast, | |
9bfadae8 | 1272 | &zns->netlink_cmd, &dp_info, 0, true); |
d62a17ae | 1273 | if (ret < 0) |
1274 | return ret; | |
1275 | ||
1276 | /* Get IPv6 routing table. */ | |
1277 | ret = netlink_request_route(zns, AF_INET6, RTM_GETROUTE); | |
1278 | if (ret < 0) | |
1279 | return ret; | |
1280 | ret = netlink_parse_info(netlink_route_change_read_unicast, | |
9bfadae8 | 1281 | &zns->netlink_cmd, &dp_info, 0, true); |
d62a17ae | 1282 | if (ret < 0) |
1283 | return ret; | |
1284 | ||
1285 | return 0; | |
718e3744 | 1286 | } |
1287 | ||
0be6e7d7 JU |
1288 | /* |
1289 | * The function returns true if the gateway info could be added | |
1290 | * to the message, otherwise false is returned. | |
1291 | */ | |
1292 | static bool _netlink_route_add_gateway_info(uint8_t route_family, | |
312a6bee JU |
1293 | uint8_t gw_family, |
1294 | struct nlmsghdr *nlmsg, | |
1295 | size_t req_size, int bytelen, | |
1296 | const struct nexthop *nexthop) | |
40c7bdb0 | 1297 | { |
d62a17ae | 1298 | if (route_family == AF_MPLS) { |
1299 | struct gw_family_t gw_fam; | |
1300 | ||
1301 | gw_fam.family = gw_family; | |
1302 | if (gw_family == AF_INET) | |
1303 | memcpy(&gw_fam.gate.ipv4, &nexthop->gate.ipv4, bytelen); | |
1304 | else | |
1305 | memcpy(&gw_fam.gate.ipv6, &nexthop->gate.ipv6, bytelen); | |
0be6e7d7 JU |
1306 | if (!nl_attr_put(nlmsg, req_size, RTA_VIA, &gw_fam.family, |
1307 | bytelen + 2)) | |
1308 | return false; | |
d62a17ae | 1309 | } else { |
92d6f769 K |
1310 | if (!(nexthop->rparent |
1311 | && IS_MAPPED_IPV6(&nexthop->rparent->gate.ipv6))) { | |
1312 | if (gw_family == AF_INET) { | |
1313 | if (!nl_attr_put(nlmsg, req_size, RTA_GATEWAY, | |
1314 | &nexthop->gate.ipv4, bytelen)) | |
1315 | return false; | |
1316 | } else { | |
1317 | if (!nl_attr_put(nlmsg, req_size, RTA_GATEWAY, | |
1318 | &nexthop->gate.ipv6, bytelen)) | |
1319 | return false; | |
1320 | } | |
0be6e7d7 | 1321 | } |
d62a17ae | 1322 | } |
0be6e7d7 JU |
1323 | |
1324 | return true; | |
40c7bdb0 | 1325 | } |
1326 | ||
b7537db6 | 1327 | static int build_label_stack(struct mpls_label_stack *nh_label, |
5fa6bfff | 1328 | enum lsp_types_t nh_label_type, |
b7537db6 SW |
1329 | mpls_lse_t *out_lse, char *label_buf, |
1330 | size_t label_buf_size) | |
1331 | { | |
1332 | char label_buf1[20]; | |
1333 | int num_labels = 0; | |
1334 | ||
1335 | for (int i = 0; nh_label && i < nh_label->num_labels; i++) { | |
582bb29a | 1336 | if (nh_label_type != ZEBRA_LSP_EVPN |
5fa6bfff | 1337 | && nh_label->label[i] == MPLS_LABEL_IMPLICIT_NULL) |
b7537db6 SW |
1338 | continue; |
1339 | ||
1340 | if (IS_ZEBRA_DEBUG_KERNEL) { | |
1341 | if (!num_labels) | |
7533cad7 QY |
1342 | snprintf(label_buf, label_buf_size, "label %u", |
1343 | nh_label->label[i]); | |
b7537db6 | 1344 | else { |
772270f3 QY |
1345 | snprintf(label_buf1, sizeof(label_buf1), "/%u", |
1346 | nh_label->label[i]); | |
b7537db6 SW |
1347 | strlcat(label_buf, label_buf1, label_buf_size); |
1348 | } | |
1349 | } | |
1350 | ||
5fa6bfff SW |
1351 | if (nh_label_type == ZEBRA_LSP_EVPN) |
1352 | out_lse[num_labels] = label2vni(&nh_label->label[i]); | |
1353 | else | |
1354 | out_lse[num_labels] = | |
1355 | mpls_lse_encode(nh_label->label[i], 0, 0, 0); | |
b7537db6 SW |
1356 | num_labels++; |
1357 | } | |
1358 | ||
1359 | return num_labels; | |
1360 | } | |
1361 | ||
e611f5da SW |
1362 | static bool _netlink_nexthop_encode_dvni_label(const struct nexthop *nexthop, |
1363 | struct nlmsghdr *nlmsg, | |
1364 | mpls_lse_t *out_lse, | |
1365 | size_t buflen, char *label_buf) | |
1366 | { | |
1367 | struct in_addr ipv4; | |
1368 | ||
1369 | if (!nl_attr_put64(nlmsg, buflen, LWTUNNEL_IP_ID, | |
1370 | htonll((uint64_t)out_lse[0]))) | |
1371 | return false; | |
1372 | ||
1373 | if (nexthop->type == NEXTHOP_TYPE_IPV4_IFINDEX) { | |
1374 | if (!nl_attr_put(nlmsg, buflen, LWTUNNEL_IP_DST, | |
1375 | &nexthop->gate.ipv4, 4)) | |
1376 | return false; | |
1377 | ||
1378 | } else if (nexthop->type == NEXTHOP_TYPE_IPV6_IFINDEX) { | |
1379 | if (IS_MAPPED_IPV6(&nexthop->gate.ipv6)) { | |
1380 | ipv4_mapped_ipv6_to_ipv4(&nexthop->gate.ipv6, &ipv4); | |
1381 | if (!nl_attr_put(nlmsg, buflen, LWTUNNEL_IP_DST, &ipv4, | |
1382 | 4)) | |
1383 | return false; | |
1384 | ||
1385 | } else { | |
1386 | if (!nl_attr_put(nlmsg, buflen, LWTUNNEL_IP_DST, | |
1387 | &nexthop->gate.ipv6, 16)) | |
1388 | return false; | |
1389 | } | |
1390 | } else { | |
1391 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1392 | zlog_debug( | |
1393 | "%s: nexthop %pNHv %s must NEXTHOP_TYPE_IPV*_IFINDEX to be vxlan encapped", | |
1394 | __func__, nexthop, label_buf); | |
1395 | ||
1396 | return false; | |
1397 | } | |
1398 | ||
1399 | return true; | |
1400 | } | |
1401 | ||
5fa6bfff | 1402 | static bool _netlink_route_encode_label_info(const struct nexthop *nexthop, |
a757997c JU |
1403 | struct nlmsghdr *nlmsg, |
1404 | size_t buflen, struct rtmsg *rtmsg, | |
1405 | char *label_buf, | |
1406 | size_t label_buf_size) | |
fa713d9e | 1407 | { |
d62a17ae | 1408 | mpls_lse_t out_lse[MPLS_MAX_LABELS]; |
a757997c | 1409 | int num_labels; |
5fa6bfff SW |
1410 | struct rtattr *nest; |
1411 | struct mpls_label_stack *nh_label; | |
1412 | enum lsp_types_t nh_label_type; | |
1413 | ||
1414 | nh_label = nexthop->nh_label; | |
1415 | nh_label_type = nexthop->nh_label_type; | |
bd47f3a3 | 1416 | |
d62a17ae | 1417 | /* |
1418 | * label_buf is *only* currently used within debugging. | |
1419 | * As such when we assign it we are guarding it inside | |
1420 | * a debug test. If you want to change this make sure | |
1421 | * you fix this assumption | |
1422 | */ | |
1423 | label_buf[0] = '\0'; | |
d62a17ae | 1424 | |
5fa6bfff SW |
1425 | num_labels = build_label_stack(nh_label, nh_label_type, out_lse, |
1426 | label_buf, label_buf_size); | |
1427 | ||
1428 | if (num_labels && nh_label_type == ZEBRA_LSP_EVPN) { | |
5fa6bfff SW |
1429 | if (!nl_attr_put16(nlmsg, buflen, RTA_ENCAP_TYPE, |
1430 | LWTUNNEL_ENCAP_IP)) | |
1431 | return false; | |
1432 | ||
1433 | nest = nl_attr_nest(nlmsg, buflen, RTA_ENCAP); | |
1434 | if (!nest) | |
1435 | return false; | |
1436 | ||
e611f5da SW |
1437 | if (_netlink_nexthop_encode_dvni_label(nexthop, nlmsg, out_lse, |
1438 | buflen, | |
1439 | label_buf) == false) | |
5fa6bfff SW |
1440 | return false; |
1441 | ||
5fa6bfff SW |
1442 | nl_attr_nest_end(nlmsg, nest); |
1443 | ||
1444 | } else if (num_labels) { | |
fa712963 RW |
1445 | /* Set the BoS bit */ |
1446 | out_lse[num_labels - 1] |= htonl(1 << MPLS_LS_S_SHIFT); | |
1447 | ||
0be6e7d7 | 1448 | if (rtmsg->rtm_family == AF_MPLS) { |
a757997c | 1449 | if (!nl_attr_put(nlmsg, buflen, RTA_NEWDST, &out_lse, |
0be6e7d7 JU |
1450 | num_labels * sizeof(mpls_lse_t))) |
1451 | return false; | |
1452 | } else { | |
a757997c JU |
1453 | if (!nl_attr_put16(nlmsg, buflen, RTA_ENCAP_TYPE, |
1454 | LWTUNNEL_ENCAP_MPLS)) | |
0be6e7d7 JU |
1455 | return false; |
1456 | ||
a757997c | 1457 | nest = nl_attr_nest(nlmsg, buflen, RTA_ENCAP); |
0be6e7d7 JU |
1458 | if (!nest) |
1459 | return false; | |
1460 | ||
a757997c | 1461 | if (!nl_attr_put(nlmsg, buflen, MPLS_IPTUNNEL_DST, |
0be6e7d7 JU |
1462 | &out_lse, |
1463 | num_labels * sizeof(mpls_lse_t))) | |
1464 | return false; | |
312a6bee | 1465 | nl_attr_nest_end(nlmsg, nest); |
66d42727 | 1466 | } |
0aabccc0 | 1467 | } |
fa713d9e | 1468 | |
a757997c JU |
1469 | return true; |
1470 | } | |
1471 | ||
1472 | static bool _netlink_route_encode_nexthop_src(const struct nexthop *nexthop, | |
1473 | int family, | |
1474 | struct nlmsghdr *nlmsg, | |
1475 | size_t buflen, int bytelen) | |
1476 | { | |
1477 | if (family == AF_INET) { | |
1478 | if (nexthop->rmap_src.ipv4.s_addr != INADDR_ANY) { | |
1479 | if (!nl_attr_put(nlmsg, buflen, RTA_PREFSRC, | |
1480 | &nexthop->rmap_src.ipv4, bytelen)) | |
1481 | return false; | |
1482 | } else if (nexthop->src.ipv4.s_addr != INADDR_ANY) { | |
1483 | if (!nl_attr_put(nlmsg, buflen, RTA_PREFSRC, | |
1484 | &nexthop->src.ipv4, bytelen)) | |
1485 | return false; | |
1486 | } | |
1487 | } else if (family == AF_INET6) { | |
1488 | if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->rmap_src.ipv6)) { | |
1489 | if (!nl_attr_put(nlmsg, buflen, RTA_PREFSRC, | |
1490 | &nexthop->rmap_src.ipv6, bytelen)) | |
1491 | return false; | |
1492 | } else if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->src.ipv6)) { | |
1493 | if (!nl_attr_put(nlmsg, buflen, RTA_PREFSRC, | |
1494 | &nexthop->src.ipv6, bytelen)) | |
1495 | return false; | |
1496 | } | |
1497 | } | |
1498 | ||
1499 | return true; | |
1500 | } | |
1501 | ||
f463eac7 HS |
1502 | static ssize_t fill_seg6ipt_encap(char *buffer, size_t buflen, |
1503 | const struct in6_addr *seg) | |
76fb7ae4 HS |
1504 | { |
1505 | struct seg6_iptunnel_encap *ipt; | |
1506 | struct ipv6_sr_hdr *srh; | |
1507 | const size_t srhlen = 24; | |
4df9d859 | 1508 | |
f463eac7 HS |
1509 | /* |
1510 | * Caution: Support only SINGLE-SID, not MULTI-SID | |
1511 | * This function only supports the case where segs represents | |
1512 | * a single SID. If you want to extend the SRv6 functionality, | |
1513 | * you should improve the Boundary Check. | |
1514 | * Ex. In case of set a SID-List include multiple-SIDs as an | |
1515 | * argument of the Transit Behavior, we must support variable | |
1516 | * boundary check for buflen. | |
1517 | */ | |
1518 | if (buflen < (sizeof(struct seg6_iptunnel_encap) + | |
1519 | sizeof(struct ipv6_sr_hdr) + 16)) | |
1520 | return -1; | |
1521 | ||
76fb7ae4 HS |
1522 | memset(buffer, 0, buflen); |
1523 | ||
1524 | ipt = (struct seg6_iptunnel_encap *)buffer; | |
1525 | ipt->mode = SEG6_IPTUN_MODE_ENCAP; | |
1526 | srh = ipt->srh; | |
1527 | srh->hdrlen = (srhlen >> 3) - 1; | |
1528 | srh->type = 4; | |
1529 | srh->segments_left = 0; | |
1530 | srh->first_segment = 0; | |
1531 | memcpy(&srh->segments[0], seg, sizeof(struct in6_addr)); | |
1532 | ||
1533 | return srhlen + 4; | |
1534 | } | |
1535 | ||
a757997c JU |
1536 | /* This function takes a nexthop as argument and adds |
1537 | * the appropriate netlink attributes to an existing | |
1538 | * netlink message. | |
1539 | * | |
1540 | * @param routedesc: Human readable description of route type | |
1541 | * (direct/recursive, single-/multipath) | |
1542 | * @param bytelen: Length of addresses in bytes. | |
1543 | * @param nexthop: Nexthop information | |
1544 | * @param nlmsg: nlmsghdr structure to fill in. | |
1545 | * @param req_size: The size allocated for the message. | |
1546 | * | |
1547 | * The function returns true if the nexthop could be added | |
1548 | * to the message, otherwise false is returned. | |
1549 | */ | |
1550 | static bool _netlink_route_build_singlepath(const struct prefix *p, | |
1551 | const char *routedesc, int bytelen, | |
1552 | const struct nexthop *nexthop, | |
1553 | struct nlmsghdr *nlmsg, | |
1554 | struct rtmsg *rtmsg, | |
1555 | size_t req_size, int cmd) | |
1556 | { | |
1557 | ||
1558 | char label_buf[256]; | |
1559 | struct vrf *vrf; | |
1560 | char addrstr[INET6_ADDRSTRLEN]; | |
1561 | ||
1562 | assert(nexthop); | |
1563 | ||
1564 | vrf = vrf_lookup_by_id(nexthop->vrf_id); | |
1565 | ||
5fa6bfff SW |
1566 | if (!_netlink_route_encode_label_info(nexthop, nlmsg, req_size, rtmsg, |
1567 | label_buf, sizeof(label_buf))) | |
a757997c JU |
1568 | return false; |
1569 | ||
eab0f8f0 HS |
1570 | if (nexthop->nh_srv6) { |
1571 | if (nexthop->nh_srv6->seg6local_action != | |
1572 | ZEBRA_SEG6_LOCAL_ACTION_UNSPEC) { | |
1573 | struct rtattr *nest; | |
1574 | const struct seg6local_context *ctx; | |
52026569 | 1575 | |
eab0f8f0 HS |
1576 | ctx = &nexthop->nh_srv6->seg6local_ctx; |
1577 | if (!nl_attr_put16(nlmsg, req_size, RTA_ENCAP_TYPE, | |
1578 | LWTUNNEL_ENCAP_SEG6_LOCAL)) | |
52026569 | 1579 | return false; |
eab0f8f0 HS |
1580 | |
1581 | nest = nl_attr_nest(nlmsg, req_size, RTA_ENCAP); | |
1582 | if (!nest) | |
52026569 | 1583 | return false; |
eab0f8f0 HS |
1584 | |
1585 | switch (nexthop->nh_srv6->seg6local_action) { | |
1586 | case ZEBRA_SEG6_LOCAL_ACTION_END: | |
1587 | if (!nl_attr_put32(nlmsg, req_size, | |
1588 | SEG6_LOCAL_ACTION, | |
1589 | SEG6_LOCAL_ACTION_END)) | |
1590 | return false; | |
1591 | break; | |
1592 | case ZEBRA_SEG6_LOCAL_ACTION_END_X: | |
1593 | if (!nl_attr_put32(nlmsg, req_size, | |
1594 | SEG6_LOCAL_ACTION, | |
1595 | SEG6_LOCAL_ACTION_END_X)) | |
1596 | return false; | |
1597 | if (!nl_attr_put(nlmsg, req_size, | |
1598 | SEG6_LOCAL_NH6, &ctx->nh6, | |
1599 | sizeof(struct in6_addr))) | |
1600 | return false; | |
1601 | break; | |
1602 | case ZEBRA_SEG6_LOCAL_ACTION_END_T: | |
1603 | if (!nl_attr_put32(nlmsg, req_size, | |
1604 | SEG6_LOCAL_ACTION, | |
1605 | SEG6_LOCAL_ACTION_END_T)) | |
1606 | return false; | |
1607 | if (!nl_attr_put32(nlmsg, req_size, | |
1608 | SEG6_LOCAL_TABLE, | |
1609 | ctx->table)) | |
1610 | return false; | |
1611 | break; | |
1612 | case ZEBRA_SEG6_LOCAL_ACTION_END_DX4: | |
1613 | if (!nl_attr_put32(nlmsg, req_size, | |
1614 | SEG6_LOCAL_ACTION, | |
1615 | SEG6_LOCAL_ACTION_END_DX4)) | |
1616 | return false; | |
1617 | if (!nl_attr_put(nlmsg, req_size, | |
1618 | SEG6_LOCAL_NH4, &ctx->nh4, | |
1619 | sizeof(struct in_addr))) | |
1620 | return false; | |
1621 | break; | |
1622 | case ZEBRA_SEG6_LOCAL_ACTION_END_DT6: | |
1623 | if (!nl_attr_put32(nlmsg, req_size, | |
1624 | SEG6_LOCAL_ACTION, | |
1625 | SEG6_LOCAL_ACTION_END_DT6)) | |
1626 | return false; | |
1627 | if (!nl_attr_put32(nlmsg, req_size, | |
1628 | SEG6_LOCAL_TABLE, | |
1629 | ctx->table)) | |
1630 | return false; | |
1631 | break; | |
7eab60a7 RS |
1632 | case ZEBRA_SEG6_LOCAL_ACTION_END_DT4: |
1633 | if (!nl_attr_put32(nlmsg, req_size, | |
1634 | SEG6_LOCAL_ACTION, | |
1635 | SEG6_LOCAL_ACTION_END_DT4)) | |
1636 | return false; | |
1637 | if (!nl_attr_put32(nlmsg, req_size, | |
1638 | SEG6_LOCAL_VRFTABLE, | |
1639 | ctx->table)) | |
1640 | return false; | |
1641 | break; | |
8bea07e4 CS |
1642 | case ZEBRA_SEG6_LOCAL_ACTION_END_DT46: |
1643 | if (!nl_attr_put32(nlmsg, req_size, | |
1644 | SEG6_LOCAL_ACTION, | |
1645 | SEG6_LOCAL_ACTION_END_DT46)) | |
1646 | return false; | |
1647 | if (!nl_attr_put32(nlmsg, req_size, | |
1648 | SEG6_LOCAL_VRFTABLE, | |
1649 | ctx->table)) | |
1650 | return false; | |
1651 | break; | |
a98701f0 DS |
1652 | case ZEBRA_SEG6_LOCAL_ACTION_END_DX2: |
1653 | case ZEBRA_SEG6_LOCAL_ACTION_END_DX6: | |
1654 | case ZEBRA_SEG6_LOCAL_ACTION_END_B6: | |
1655 | case ZEBRA_SEG6_LOCAL_ACTION_END_B6_ENCAP: | |
1656 | case ZEBRA_SEG6_LOCAL_ACTION_END_BM: | |
1657 | case ZEBRA_SEG6_LOCAL_ACTION_END_S: | |
1658 | case ZEBRA_SEG6_LOCAL_ACTION_END_AS: | |
1659 | case ZEBRA_SEG6_LOCAL_ACTION_END_AM: | |
1660 | case ZEBRA_SEG6_LOCAL_ACTION_END_BPF: | |
1661 | case ZEBRA_SEG6_LOCAL_ACTION_UNSPEC: | |
eab0f8f0 HS |
1662 | zlog_err("%s: unsupport seg6local behaviour action=%u", |
1663 | __func__, | |
1664 | nexthop->nh_srv6->seg6local_action); | |
0a543b79 | 1665 | return false; |
eab0f8f0 HS |
1666 | } |
1667 | nl_attr_nest_end(nlmsg, nest); | |
1668 | } | |
1669 | ||
1670 | if (!sid_zero(&nexthop->nh_srv6->seg6_segs)) { | |
1671 | char tun_buf[4096]; | |
1672 | ssize_t tun_len; | |
1673 | struct rtattr *nest; | |
1674 | ||
1675 | if (!nl_attr_put16(nlmsg, req_size, RTA_ENCAP_TYPE, | |
1676 | LWTUNNEL_ENCAP_SEG6)) | |
52026569 | 1677 | return false; |
eab0f8f0 HS |
1678 | nest = nl_attr_nest(nlmsg, req_size, RTA_ENCAP); |
1679 | if (!nest) | |
52026569 | 1680 | return false; |
eab0f8f0 HS |
1681 | tun_len = fill_seg6ipt_encap(tun_buf, sizeof(tun_buf), |
1682 | &nexthop->nh_srv6->seg6_segs); | |
1683 | if (tun_len < 0) | |
52026569 | 1684 | return false; |
eab0f8f0 HS |
1685 | if (!nl_attr_put(nlmsg, req_size, SEG6_IPTUNNEL_SRH, |
1686 | tun_buf, tun_len)) | |
52026569 | 1687 | return false; |
eab0f8f0 | 1688 | nl_attr_nest_end(nlmsg, nest); |
8689b25a | 1689 | } |
76fb7ae4 HS |
1690 | } |
1691 | ||
d62a17ae | 1692 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ONLINK)) |
1693 | rtmsg->rtm_flags |= RTNH_F_ONLINK; | |
1694 | ||
002e5c43 | 1695 | if (is_route_v4_over_v6(rtmsg->rtm_family, nexthop->type)) { |
d62a17ae | 1696 | rtmsg->rtm_flags |= RTNH_F_ONLINK; |
0be6e7d7 JU |
1697 | if (!nl_attr_put(nlmsg, req_size, RTA_GATEWAY, &ipv4_ll, 4)) |
1698 | return false; | |
1699 | if (!nl_attr_put32(nlmsg, req_size, RTA_OIF, nexthop->ifindex)) | |
1700 | return false; | |
d62a17ae | 1701 | |
a757997c JU |
1702 | if (cmd == RTM_NEWROUTE) { |
1703 | if (!_netlink_route_encode_nexthop_src( | |
1704 | nexthop, AF_INET, nlmsg, req_size, bytelen)) | |
0be6e7d7 JU |
1705 | return false; |
1706 | } | |
d62a17ae | 1707 | |
1708 | if (IS_ZEBRA_DEBUG_KERNEL) | |
9266b315 RZ |
1709 | zlog_debug("%s: 5549 (%s): %pFX nexthop via %s %s if %u vrf %s(%u)", |
1710 | __func__, routedesc, p, ipv4_ll_buf, | |
1711 | label_buf, nexthop->ifindex, | |
1712 | VRF_LOGNAME(vrf), nexthop->vrf_id); | |
0be6e7d7 | 1713 | return true; |
0aabccc0 DD |
1714 | } |
1715 | ||
d62a17ae | 1716 | if (nexthop->type == NEXTHOP_TYPE_IPV4 |
1717 | || nexthop->type == NEXTHOP_TYPE_IPV4_IFINDEX) { | |
1718 | /* Send deletes to the kernel without specifying the next-hop */ | |
0be6e7d7 JU |
1719 | if (cmd != RTM_DELROUTE) { |
1720 | if (!_netlink_route_add_gateway_info( | |
1721 | rtmsg->rtm_family, AF_INET, nlmsg, req_size, | |
1722 | bytelen, nexthop)) | |
1723 | return false; | |
1724 | } | |
d62a17ae | 1725 | |
1726 | if (cmd == RTM_NEWROUTE) { | |
a757997c JU |
1727 | if (!_netlink_route_encode_nexthop_src( |
1728 | nexthop, AF_INET, nlmsg, req_size, bytelen)) | |
1729 | return false; | |
d62a17ae | 1730 | } |
1731 | ||
9266b315 RZ |
1732 | if (IS_ZEBRA_DEBUG_KERNEL) { |
1733 | inet_ntop(AF_INET, &nexthop->gate.ipv4, addrstr, | |
1734 | sizeof(addrstr)); | |
1735 | zlog_debug("%s: (%s): %pFX nexthop via %s %s if %u vrf %s(%u)", | |
1736 | __func__, routedesc, p, addrstr, label_buf, | |
1737 | nexthop->ifindex, VRF_LOGNAME(vrf), | |
1738 | nexthop->vrf_id); | |
1739 | } | |
0aabccc0 | 1740 | } |
fa713d9e | 1741 | |
d62a17ae | 1742 | if (nexthop->type == NEXTHOP_TYPE_IPV6 |
1743 | || nexthop->type == NEXTHOP_TYPE_IPV6_IFINDEX) { | |
0be6e7d7 JU |
1744 | if (!_netlink_route_add_gateway_info(rtmsg->rtm_family, |
1745 | AF_INET6, nlmsg, req_size, | |
1746 | bytelen, nexthop)) | |
1747 | return false; | |
d62a17ae | 1748 | |
1749 | if (cmd == RTM_NEWROUTE) { | |
a757997c JU |
1750 | if (!_netlink_route_encode_nexthop_src( |
1751 | nexthop, AF_INET6, nlmsg, req_size, | |
1752 | bytelen)) | |
1753 | return false; | |
d62a17ae | 1754 | } |
fa713d9e | 1755 | |
9266b315 RZ |
1756 | if (IS_ZEBRA_DEBUG_KERNEL) { |
1757 | inet_ntop(AF_INET6, &nexthop->gate.ipv6, addrstr, | |
1758 | sizeof(addrstr)); | |
1759 | zlog_debug("%s: (%s): %pFX nexthop via %s %s if %u vrf %s(%u)", | |
1760 | __func__, routedesc, p, addrstr, label_buf, | |
1761 | nexthop->ifindex, VRF_LOGNAME(vrf), | |
1762 | nexthop->vrf_id); | |
1763 | } | |
d62a17ae | 1764 | } |
5e210522 DS |
1765 | |
1766 | /* | |
1767 | * We have the ifindex so we should always send it | |
1768 | * This is especially useful if we are doing route | |
1769 | * leaking. | |
1770 | */ | |
0be6e7d7 JU |
1771 | if (nexthop->type != NEXTHOP_TYPE_BLACKHOLE) { |
1772 | if (!nl_attr_put32(nlmsg, req_size, RTA_OIF, nexthop->ifindex)) | |
1773 | return false; | |
1774 | } | |
d62a17ae | 1775 | |
275565fb | 1776 | if (nexthop->type == NEXTHOP_TYPE_IFINDEX) { |
d62a17ae | 1777 | if (cmd == RTM_NEWROUTE) { |
a757997c JU |
1778 | if (!_netlink_route_encode_nexthop_src( |
1779 | nexthop, AF_INET, nlmsg, req_size, bytelen)) | |
1780 | return false; | |
d62a17ae | 1781 | } |
fa713d9e | 1782 | |
d62a17ae | 1783 | if (IS_ZEBRA_DEBUG_KERNEL) |
9266b315 RZ |
1784 | zlog_debug("%s: (%s): %pFX nexthop via if %u vrf %s(%u)", |
1785 | __func__, routedesc, p, nexthop->ifindex, | |
1786 | VRF_LOGNAME(vrf), nexthop->vrf_id); | |
0aabccc0 | 1787 | } |
0be6e7d7 JU |
1788 | |
1789 | return true; | |
fa713d9e CF |
1790 | } |
1791 | ||
63eaefa8 R |
1792 | /* This function appends tag value as rtnl flow attribute |
1793 | * to the given netlink msg only if value is less than 256. | |
1794 | * Used only if SUPPORT_REALMS enabled. | |
1795 | * | |
1796 | * @param nlmsg: nlmsghdr structure to fill in. | |
1797 | * @param maxlen: The size allocated for the message. | |
1798 | * @param tag: The route tag. | |
1799 | * | |
1800 | * The function returns true if the flow attribute could | |
1801 | * be added to the message, otherwise false is returned. | |
1802 | */ | |
1803 | static inline bool _netlink_set_tag(struct nlmsghdr *n, unsigned int maxlen, | |
1804 | route_tag_t tag) | |
1805 | { | |
1806 | if (tag > 0 && tag <= 255) { | |
1807 | if (!nl_attr_put32(n, maxlen, RTA_FLOW, tag)) | |
1808 | return false; | |
1809 | } | |
1810 | return true; | |
1811 | } | |
1812 | ||
fa713d9e | 1813 | /* This function takes a nexthop as argument and |
312a6bee | 1814 | * appends to the given netlink msg. If the nexthop |
fa713d9e CF |
1815 | * defines a preferred source, the src parameter |
1816 | * will be modified to point to that src, otherwise | |
1817 | * it will be kept unmodified. | |
1818 | * | |
1819 | * @param routedesc: Human readable description of route type | |
1820 | * (direct/recursive, single-/multipath) | |
1821 | * @param bytelen: Length of addresses in bytes. | |
1822 | * @param nexthop: Nexthop information | |
312a6bee JU |
1823 | * @param nlmsg: nlmsghdr structure to fill in. |
1824 | * @param req_size: The size allocated for the message. | |
fa713d9e CF |
1825 | * @param src: pointer pointing to a location where |
1826 | * the prefsrc should be stored. | |
0be6e7d7 JU |
1827 | * |
1828 | * The function returns true if the nexthop could be added | |
1829 | * to the message, otherwise false is returned. | |
fa713d9e | 1830 | */ |
63eaefa8 R |
1831 | static bool _netlink_route_build_multipath( |
1832 | const struct prefix *p, const char *routedesc, int bytelen, | |
1833 | const struct nexthop *nexthop, struct nlmsghdr *nlmsg, size_t req_size, | |
1834 | struct rtmsg *rtmsg, const union g_addr **src, route_tag_t tag) | |
fa713d9e | 1835 | { |
9a62e84b | 1836 | char label_buf[256]; |
bd47f3a3 | 1837 | struct vrf *vrf; |
312a6bee | 1838 | struct rtnexthop *rtnh; |
d62a17ae | 1839 | |
312a6bee | 1840 | rtnh = nl_attr_rtnh(nlmsg, req_size); |
0be6e7d7 JU |
1841 | if (rtnh == NULL) |
1842 | return false; | |
d62a17ae | 1843 | |
b7537db6 SW |
1844 | assert(nexthop); |
1845 | ||
bd47f3a3 JU |
1846 | vrf = vrf_lookup_by_id(nexthop->vrf_id); |
1847 | ||
5fa6bfff SW |
1848 | if (!_netlink_route_encode_label_info(nexthop, nlmsg, req_size, rtmsg, |
1849 | label_buf, sizeof(label_buf))) | |
a757997c | 1850 | return false; |
d62a17ae | 1851 | |
1852 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ONLINK)) | |
1853 | rtnh->rtnh_flags |= RTNH_F_ONLINK; | |
1854 | ||
002e5c43 | 1855 | if (is_route_v4_over_v6(rtmsg->rtm_family, nexthop->type)) { |
d62a17ae | 1856 | rtnh->rtnh_flags |= RTNH_F_ONLINK; |
a757997c | 1857 | if (!nl_attr_put(nlmsg, req_size, RTA_GATEWAY, &ipv4_ll, 4)) |
0be6e7d7 | 1858 | return false; |
d62a17ae | 1859 | rtnh->rtnh_ifindex = nexthop->ifindex; |
8d27e1aa | 1860 | if (nexthop->weight) |
1861 | rtnh->rtnh_hops = nexthop->weight - 1; | |
d62a17ae | 1862 | |
975a328e | 1863 | if (nexthop->rmap_src.ipv4.s_addr != INADDR_ANY) |
d62a17ae | 1864 | *src = &nexthop->rmap_src; |
975a328e | 1865 | else if (nexthop->src.ipv4.s_addr != INADDR_ANY) |
d62a17ae | 1866 | *src = &nexthop->src; |
1867 | ||
1868 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1869 | zlog_debug( | |
9266b315 RZ |
1870 | "%s: 5549 (%s): %pFX nexthop via %s %s if %u vrf %s(%u)", |
1871 | __func__, routedesc, p, ipv4_ll_buf, label_buf, | |
bd47f3a3 JU |
1872 | nexthop->ifindex, VRF_LOGNAME(vrf), |
1873 | nexthop->vrf_id); | |
312a6bee | 1874 | nl_attr_rtnh_end(nlmsg, rtnh); |
0be6e7d7 | 1875 | return true; |
d62a17ae | 1876 | } |
1877 | ||
1878 | if (nexthop->type == NEXTHOP_TYPE_IPV4 | |
1879 | || nexthop->type == NEXTHOP_TYPE_IPV4_IFINDEX) { | |
0be6e7d7 JU |
1880 | if (!_netlink_route_add_gateway_info(rtmsg->rtm_family, AF_INET, |
1881 | nlmsg, req_size, bytelen, | |
1882 | nexthop)) | |
1883 | return false; | |
1884 | ||
975a328e | 1885 | if (nexthop->rmap_src.ipv4.s_addr != INADDR_ANY) |
d62a17ae | 1886 | *src = &nexthop->rmap_src; |
975a328e | 1887 | else if (nexthop->src.ipv4.s_addr != INADDR_ANY) |
d62a17ae | 1888 | *src = &nexthop->src; |
1889 | ||
a50404aa RZ |
1890 | if (IS_ZEBRA_DEBUG_KERNEL) |
1891 | zlog_debug("%s: (%s): %pFX nexthop via %pI4 %s if %u vrf %s(%u)", | |
1892 | __func__, routedesc, p, &nexthop->gate.ipv4, | |
1893 | label_buf, nexthop->ifindex, | |
1894 | VRF_LOGNAME(vrf), nexthop->vrf_id); | |
d62a17ae | 1895 | } |
1896 | if (nexthop->type == NEXTHOP_TYPE_IPV6 | |
1897 | || nexthop->type == NEXTHOP_TYPE_IPV6_IFINDEX) { | |
0be6e7d7 JU |
1898 | if (!_netlink_route_add_gateway_info(rtmsg->rtm_family, |
1899 | AF_INET6, nlmsg, req_size, | |
1900 | bytelen, nexthop)) | |
1901 | return false; | |
d62a17ae | 1902 | |
1903 | if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->rmap_src.ipv6)) | |
1904 | *src = &nexthop->rmap_src; | |
1905 | else if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->src.ipv6)) | |
1906 | *src = &nexthop->src; | |
1907 | ||
a50404aa RZ |
1908 | if (IS_ZEBRA_DEBUG_KERNEL) |
1909 | zlog_debug("%s: (%s): %pFX nexthop via %pI6 %s if %u vrf %s(%u)", | |
1910 | __func__, routedesc, p, &nexthop->gate.ipv6, | |
1911 | label_buf, nexthop->ifindex, | |
1912 | VRF_LOGNAME(vrf), nexthop->vrf_id); | |
d62a17ae | 1913 | } |
5e210522 DS |
1914 | |
1915 | /* | |
1916 | * We have figured out the ifindex so we should always send it | |
1917 | * This is especially useful if we are doing route | |
1918 | * leaking. | |
1919 | */ | |
1920 | if (nexthop->type != NEXTHOP_TYPE_BLACKHOLE) | |
1921 | rtnh->rtnh_ifindex = nexthop->ifindex; | |
1922 | ||
d62a17ae | 1923 | /* ifindex */ |
275565fb | 1924 | if (nexthop->type == NEXTHOP_TYPE_IFINDEX) { |
975a328e | 1925 | if (nexthop->rmap_src.ipv4.s_addr != INADDR_ANY) |
d62a17ae | 1926 | *src = &nexthop->rmap_src; |
975a328e | 1927 | else if (nexthop->src.ipv4.s_addr != INADDR_ANY) |
d62a17ae | 1928 | *src = &nexthop->src; |
1929 | ||
1930 | if (IS_ZEBRA_DEBUG_KERNEL) | |
9266b315 RZ |
1931 | zlog_debug("%s: (%s): %pFX nexthop via if %u vrf %s(%u)", |
1932 | __func__, routedesc, p, nexthop->ifindex, | |
1933 | VRF_LOGNAME(vrf), nexthop->vrf_id); | |
d62a17ae | 1934 | } |
df7fb580 DS |
1935 | |
1936 | if (nexthop->weight) | |
1937 | rtnh->rtnh_hops = nexthop->weight - 1; | |
0be6e7d7 | 1938 | |
63eaefa8 R |
1939 | if (!_netlink_set_tag(nlmsg, req_size, tag)) |
1940 | return false; | |
1941 | ||
312a6bee | 1942 | nl_attr_rtnh_end(nlmsg, rtnh); |
0be6e7d7 | 1943 | return true; |
fa713d9e CF |
1944 | } |
1945 | ||
f2595bd5 DS |
1946 | static inline bool |
1947 | _netlink_mpls_build_singlepath(const struct prefix *p, const char *routedesc, | |
1948 | const struct zebra_nhlfe *nhlfe, | |
1949 | struct nlmsghdr *nlmsg, struct rtmsg *rtmsg, | |
1950 | size_t req_size, int cmd) | |
40c7bdb0 | 1951 | { |
d62a17ae | 1952 | int bytelen; |
d7c0a89a | 1953 | uint8_t family; |
40c7bdb0 | 1954 | |
d62a17ae | 1955 | family = NHLFE_FAMILY(nhlfe); |
1956 | bytelen = (family == AF_INET ? 4 : 16); | |
0be6e7d7 JU |
1957 | return _netlink_route_build_singlepath(p, routedesc, bytelen, |
1958 | nhlfe->nexthop, nlmsg, rtmsg, | |
1959 | req_size, cmd); | |
40c7bdb0 | 1960 | } |
1961 | ||
1962 | ||
0be6e7d7 | 1963 | static inline bool |
9a0132a5 | 1964 | _netlink_mpls_build_multipath(const struct prefix *p, const char *routedesc, |
f2595bd5 | 1965 | const struct zebra_nhlfe *nhlfe, |
312a6bee JU |
1966 | struct nlmsghdr *nlmsg, size_t req_size, |
1967 | struct rtmsg *rtmsg, const union g_addr **src) | |
40c7bdb0 | 1968 | { |
d62a17ae | 1969 | int bytelen; |
d7c0a89a | 1970 | uint8_t family; |
40c7bdb0 | 1971 | |
d62a17ae | 1972 | family = NHLFE_FAMILY(nhlfe); |
1973 | bytelen = (family == AF_INET ? 4 : 16); | |
0be6e7d7 JU |
1974 | return _netlink_route_build_multipath(p, routedesc, bytelen, |
1975 | nhlfe->nexthop, nlmsg, req_size, | |
63eaefa8 | 1976 | rtmsg, src, 0); |
40c7bdb0 | 1977 | } |
1978 | ||
d7c0a89a | 1979 | static void _netlink_mpls_debug(int cmd, uint32_t label, const char *routedesc) |
40c7bdb0 | 1980 | { |
d62a17ae | 1981 | if (IS_ZEBRA_DEBUG_KERNEL) |
0be6e7d7 JU |
1982 | zlog_debug("netlink_mpls_multipath_msg_encode() (%s): %s %u/20", |
1983 | routedesc, nl_msg_type_to_str(cmd), label); | |
fa713d9e CF |
1984 | } |
1985 | ||
05657ec2 PG |
1986 | static int netlink_neigh_update(int cmd, int ifindex, void *addr, char *lla, |
1987 | int llalen, ns_id_t ns_id, uint8_t family, | |
1988 | bool permanent, uint8_t protocol) | |
5c610faf | 1989 | { |
d62a17ae | 1990 | struct { |
1991 | struct nlmsghdr n; | |
1992 | struct ndmsg ndm; | |
1993 | char buf[256]; | |
1994 | } req; | |
5c610faf | 1995 | |
5895d33f | 1996 | struct zebra_ns *zns = zebra_ns_lookup(ns_id); |
8f7d9fc0 | 1997 | |
5605ecfc | 1998 | memset(&req, 0, sizeof(req)); |
5c610faf | 1999 | |
d62a17ae | 2000 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)); |
2001 | req.n.nlmsg_flags = NLM_F_CREATE | NLM_F_REQUEST; | |
2002 | req.n.nlmsg_type = cmd; // RTM_NEWNEIGH or RTM_DELNEIGH | |
2003 | req.n.nlmsg_pid = zns->netlink_cmd.snl.nl_pid; | |
a55ba23f | 2004 | |
05657ec2 | 2005 | req.ndm.ndm_family = family; |
d62a17ae | 2006 | req.ndm.ndm_ifindex = ifindex; |
2007 | req.ndm.ndm_type = RTN_UNICAST; | |
05657ec2 PG |
2008 | if (cmd == RTM_NEWNEIGH) { |
2009 | if (!permanent) | |
2010 | req.ndm.ndm_state = NUD_REACHABLE; | |
2011 | else | |
2012 | req.ndm.ndm_state = NUD_PERMANENT; | |
2013 | } else | |
2014 | req.ndm.ndm_state = NUD_FAILED; | |
5c610faf | 2015 | |
312a6bee JU |
2016 | nl_attr_put(&req.n, sizeof(req), NDA_PROTOCOL, &protocol, |
2017 | sizeof(protocol)); | |
05657ec2 | 2018 | req.ndm.ndm_type = RTN_UNICAST; |
df948efc PG |
2019 | nl_attr_put(&req.n, sizeof(req), NDA_DST, addr, |
2020 | family2addrsize(family)); | |
05657ec2 PG |
2021 | if (lla) |
2022 | nl_attr_put(&req.n, sizeof(req), NDA_LLADDR, lla, llalen); | |
5c610faf | 2023 | |
d62a17ae | 2024 | return netlink_talk(netlink_talk_filter, &req.n, &zns->netlink_cmd, zns, |
9bfadae8 | 2025 | false); |
5c610faf DS |
2026 | } |
2027 | ||
762288f5 SW |
2028 | static bool nexthop_set_src(const struct nexthop *nexthop, int family, |
2029 | union g_addr *src) | |
2030 | { | |
2031 | if (family == AF_INET) { | |
2032 | if (nexthop->rmap_src.ipv4.s_addr != INADDR_ANY) { | |
2033 | src->ipv4 = nexthop->rmap_src.ipv4; | |
2034 | return true; | |
2035 | } else if (nexthop->src.ipv4.s_addr != INADDR_ANY) { | |
2036 | src->ipv4 = nexthop->src.ipv4; | |
2037 | return true; | |
2038 | } | |
2039 | } else if (family == AF_INET6) { | |
2040 | if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->rmap_src.ipv6)) { | |
2041 | src->ipv6 = nexthop->rmap_src.ipv6; | |
2042 | return true; | |
2043 | } else if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->src.ipv6)) { | |
2044 | src->ipv6 = nexthop->src.ipv6; | |
2045 | return true; | |
2046 | } | |
2047 | } | |
2048 | ||
2049 | return false; | |
2050 | } | |
2051 | ||
0be6e7d7 JU |
2052 | /* |
2053 | * The function returns true if the attribute could be added | |
2054 | * to the message, otherwise false is returned. | |
2055 | */ | |
2056 | static int netlink_route_nexthop_encap(struct nlmsghdr *n, size_t nlen, | |
2057 | struct nexthop *nh) | |
f2a0ba3a RZ |
2058 | { |
2059 | struct rtattr *nest; | |
2060 | ||
2061 | switch (nh->nh_encap_type) { | |
2062 | case NET_VXLAN: | |
a757997c | 2063 | if (!nl_attr_put16(n, nlen, RTA_ENCAP_TYPE, nh->nh_encap_type)) |
0be6e7d7 | 2064 | return false; |
f2a0ba3a | 2065 | |
312a6bee | 2066 | nest = nl_attr_nest(n, nlen, RTA_ENCAP); |
0be6e7d7 JU |
2067 | if (!nest) |
2068 | return false; | |
2069 | ||
2070 | if (!nl_attr_put32(n, nlen, 0 /* VXLAN_VNI */, | |
2071 | nh->nh_encap.vni)) | |
2072 | return false; | |
312a6bee | 2073 | nl_attr_nest_end(n, nest); |
f2a0ba3a RZ |
2074 | break; |
2075 | } | |
0be6e7d7 JU |
2076 | |
2077 | return true; | |
f2a0ba3a RZ |
2078 | } |
2079 | ||
7cdb1a84 MS |
2080 | /* |
2081 | * Routing table change via netlink interface, using a dataplane context object | |
0be6e7d7 JU |
2082 | * |
2083 | * Returns -1 on failure, 0 when the msg doesn't fit entirely in the buffer | |
2084 | * otherwise the number of bytes written to buf. | |
7cdb1a84 | 2085 | */ |
0be6e7d7 JU |
2086 | ssize_t netlink_route_multipath_msg_encode(int cmd, |
2087 | struct zebra_dplane_ctx *ctx, | |
2088 | uint8_t *data, size_t datalen, | |
2089 | bool fpm, bool force_nhg) | |
7cdb1a84 MS |
2090 | { |
2091 | int bytelen; | |
7cdb1a84 MS |
2092 | struct nexthop *nexthop = NULL; |
2093 | unsigned int nexthop_num; | |
7cdb1a84 | 2094 | const char *routedesc; |
762288f5 | 2095 | bool setsrc = false; |
7cdb1a84 MS |
2096 | union g_addr src; |
2097 | const struct prefix *p, *src_p; | |
2098 | uint32_t table_id; | |
d4000d7b | 2099 | struct nlsock *nl; |
63eaefa8 | 2100 | route_tag_t tag = 0; |
7cdb1a84 MS |
2101 | |
2102 | struct { | |
2103 | struct nlmsghdr n; | |
2104 | struct rtmsg r; | |
e57a3fab RZ |
2105 | char buf[]; |
2106 | } *req = (void *)data; | |
7cdb1a84 MS |
2107 | |
2108 | p = dplane_ctx_get_dest(ctx); | |
2109 | src_p = dplane_ctx_get_src(ctx); | |
2110 | ||
0be6e7d7 JU |
2111 | if (datalen < sizeof(*req)) |
2112 | return 0; | |
2113 | ||
d4000d7b DS |
2114 | nl = kernel_netlink_nlsock_lookup(dplane_ctx_get_ns_sock(ctx)); |
2115 | ||
e57a3fab | 2116 | memset(req, 0, sizeof(*req)); |
7cdb1a84 | 2117 | |
b9c87515 | 2118 | bytelen = (p->family == AF_INET ? 4 : 16); |
7cdb1a84 | 2119 | |
e57a3fab RZ |
2120 | req->n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)); |
2121 | req->n.nlmsg_flags = NLM_F_CREATE | NLM_F_REQUEST; | |
7cdb1a84 | 2122 | |
334734a8 DS |
2123 | if ((cmd == RTM_NEWROUTE) && |
2124 | ((p->family == AF_INET) || v6_rr_semantics)) | |
e57a3fab | 2125 | req->n.nlmsg_flags |= NLM_F_REPLACE; |
7cdb1a84 | 2126 | |
e57a3fab | 2127 | req->n.nlmsg_type = cmd; |
7cdb1a84 | 2128 | |
d4000d7b | 2129 | req->n.nlmsg_pid = nl->snl.nl_pid; |
7cdb1a84 | 2130 | |
b9c87515 | 2131 | req->r.rtm_family = p->family; |
e57a3fab RZ |
2132 | req->r.rtm_dst_len = p->prefixlen; |
2133 | req->r.rtm_src_len = src_p ? src_p->prefixlen : 0; | |
2134 | req->r.rtm_scope = RT_SCOPE_UNIVERSE; | |
7cdb1a84 | 2135 | |
5709131c | 2136 | if (cmd == RTM_DELROUTE) |
e57a3fab | 2137 | req->r.rtm_protocol = zebra2proto(dplane_ctx_get_old_type(ctx)); |
5709131c | 2138 | else |
e57a3fab | 2139 | req->r.rtm_protocol = zebra2proto(dplane_ctx_get_type(ctx)); |
7cdb1a84 MS |
2140 | |
2141 | /* | |
2142 | * blackhole routes are not RTN_UNICAST, they are | |
2143 | * RTN_ BLACKHOLE|UNREACHABLE|PROHIBIT | |
2144 | * so setting this value as a RTN_UNICAST would | |
2145 | * cause the route lookup of just the prefix | |
2146 | * to fail. So no need to specify this for | |
2147 | * the RTM_DELROUTE case | |
2148 | */ | |
2149 | if (cmd != RTM_DELROUTE) | |
e57a3fab | 2150 | req->r.rtm_type = RTN_UNICAST; |
7cdb1a84 | 2151 | |
0be6e7d7 JU |
2152 | if (!nl_attr_put(&req->n, datalen, RTA_DST, &p->u.prefix, bytelen)) |
2153 | return 0; | |
2154 | if (src_p) { | |
2155 | if (!nl_attr_put(&req->n, datalen, RTA_SRC, &src_p->u.prefix, | |
2156 | bytelen)) | |
2157 | return 0; | |
2158 | } | |
7cdb1a84 MS |
2159 | |
2160 | /* Metric. */ | |
2161 | /* Hardcode the metric for all routes coming from zebra. Metric isn't | |
2162 | * used | |
2163 | * either by the kernel or by zebra. Its purely for calculating best | |
2164 | * path(s) | |
2165 | * by the routing protocol and for communicating with protocol peers. | |
2166 | */ | |
0be6e7d7 | 2167 | if (!nl_attr_put32(&req->n, datalen, RTA_PRIORITY, |
68ff69fa | 2168 | ROUTE_INSTALLATION_METRIC)) |
0be6e7d7 | 2169 | return 0; |
7cdb1a84 MS |
2170 | |
2171 | #if defined(SUPPORT_REALMS) | |
63eaefa8 R |
2172 | if (cmd == RTM_DELROUTE) |
2173 | tag = dplane_ctx_get_old_tag(ctx); | |
2174 | else | |
2175 | tag = dplane_ctx_get_tag(ctx); | |
7cdb1a84 | 2176 | #endif |
63eaefa8 | 2177 | |
7cdb1a84 MS |
2178 | /* Table corresponding to this route. */ |
2179 | table_id = dplane_ctx_get_table(ctx); | |
2180 | if (table_id < 256) | |
e57a3fab | 2181 | req->r.rtm_table = table_id; |
7cdb1a84 | 2182 | else { |
e57a3fab | 2183 | req->r.rtm_table = RT_TABLE_UNSPEC; |
0be6e7d7 JU |
2184 | if (!nl_attr_put32(&req->n, datalen, RTA_TABLE, table_id)) |
2185 | return 0; | |
7cdb1a84 MS |
2186 | } |
2187 | ||
9266b315 RZ |
2188 | if (IS_ZEBRA_DEBUG_KERNEL) |
2189 | zlog_debug( | |
2190 | "%s: %s %pFX vrf %u(%u)", __func__, | |
2191 | nl_msg_type_to_str(cmd), p, dplane_ctx_get_vrf(ctx), | |
2192 | table_id); | |
7cdb1a84 MS |
2193 | |
2194 | /* | |
2195 | * If we are not updating the route and we have received | |
2196 | * a route delete, then all we need to fill in is the | |
2197 | * prefix information to tell the kernel to schwack | |
2198 | * it. | |
2199 | */ | |
63eaefa8 R |
2200 | if (cmd == RTM_DELROUTE) { |
2201 | if (!_netlink_set_tag(&req->n, datalen, tag)) | |
2202 | return 0; | |
0be6e7d7 | 2203 | return NLMSG_ALIGN(req->n.nlmsg_len); |
63eaefa8 | 2204 | } |
7cdb1a84 MS |
2205 | |
2206 | if (dplane_ctx_get_mtu(ctx) || dplane_ctx_get_nh_mtu(ctx)) { | |
312a6bee | 2207 | struct rtattr *nest; |
7cdb1a84 MS |
2208 | uint32_t mtu = dplane_ctx_get_mtu(ctx); |
2209 | uint32_t nexthop_mtu = dplane_ctx_get_nh_mtu(ctx); | |
5709131c | 2210 | |
7cdb1a84 MS |
2211 | if (!mtu || (nexthop_mtu && nexthop_mtu < mtu)) |
2212 | mtu = nexthop_mtu; | |
312a6bee JU |
2213 | |
2214 | nest = nl_attr_nest(&req->n, datalen, RTA_METRICS); | |
0be6e7d7 JU |
2215 | if (nest == NULL) |
2216 | return 0; | |
2217 | ||
2218 | if (!nl_attr_put(&req->n, datalen, RTAX_MTU, &mtu, sizeof(mtu))) | |
2219 | return 0; | |
312a6bee | 2220 | nl_attr_nest_end(&req->n, nest); |
7cdb1a84 MS |
2221 | } |
2222 | ||
4be03ff4 IR |
2223 | /* |
2224 | * Always install blackhole routes without using nexthops, because of | |
2225 | * the following kernel problems: | |
2226 | * 1. Kernel nexthops don't suport unreachable/prohibit route types. | |
2227 | * 2. Blackhole kernel nexthops are deleted when loopback is down. | |
2228 | */ | |
2229 | nexthop = dplane_ctx_get_ng(ctx)->nexthop; | |
2230 | if (nexthop) { | |
2231 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_RECURSIVE)) | |
2232 | nexthop = nexthop->resolved; | |
2233 | ||
2234 | if (nexthop->type == NEXTHOP_TYPE_BLACKHOLE) { | |
2235 | switch (nexthop->bh_type) { | |
2236 | case BLACKHOLE_ADMINPROHIB: | |
2237 | req->r.rtm_type = RTN_PROHIBIT; | |
2238 | break; | |
2239 | case BLACKHOLE_REJECT: | |
2240 | req->r.rtm_type = RTN_UNREACHABLE; | |
2241 | break; | |
a98701f0 DS |
2242 | case BLACKHOLE_UNSPEC: |
2243 | case BLACKHOLE_NULL: | |
4be03ff4 IR |
2244 | req->r.rtm_type = RTN_BLACKHOLE; |
2245 | break; | |
2246 | } | |
2247 | return NLMSG_ALIGN(req->n.nlmsg_len); | |
2248 | } | |
2249 | } | |
2250 | ||
6c67f41f SW |
2251 | if ((!fpm && kernel_nexthops_supported() |
2252 | && (!proto_nexthops_only() | |
2253 | || is_proto_nhg(dplane_ctx_get_nhe_id(ctx), 0))) | |
2254 | || (fpm && force_nhg)) { | |
d8bfd8dc | 2255 | /* Kernel supports nexthop objects */ |
9a0132a5 | 2256 | if (IS_ZEBRA_DEBUG_KERNEL) |
0be6e7d7 JU |
2257 | zlog_debug("%s: %pFX nhg_id is %u", __func__, p, |
2258 | dplane_ctx_get_nhe_id(ctx)); | |
e57a3fab | 2259 | |
0be6e7d7 JU |
2260 | if (!nl_attr_put32(&req->n, datalen, RTA_NH_ID, |
2261 | dplane_ctx_get_nhe_id(ctx))) | |
2262 | return 0; | |
d8bfd8dc SW |
2263 | |
2264 | /* Have to determine src still */ | |
2265 | for (ALL_NEXTHOPS_PTR(dplane_ctx_get_ng(ctx), nexthop)) { | |
2266 | if (setsrc) | |
2267 | break; | |
2268 | ||
e57a3fab | 2269 | setsrc = nexthop_set_src(nexthop, p->family, &src); |
d8bfd8dc SW |
2270 | } |
2271 | ||
2272 | if (setsrc) { | |
0be6e7d7 JU |
2273 | if (p->family == AF_INET) { |
2274 | if (!nl_attr_put(&req->n, datalen, RTA_PREFSRC, | |
2275 | &src.ipv4, bytelen)) | |
2276 | return 0; | |
2277 | } else if (p->family == AF_INET6) { | |
2278 | if (!nl_attr_put(&req->n, datalen, RTA_PREFSRC, | |
2279 | &src.ipv6, bytelen)) | |
2280 | return 0; | |
2281 | } | |
d8bfd8dc | 2282 | } |
f78fe8f3 | 2283 | |
0be6e7d7 | 2284 | return NLMSG_ALIGN(req->n.nlmsg_len); |
de3f5488 SW |
2285 | } |
2286 | ||
7cdb1a84 | 2287 | /* Count overall nexthops so we can decide whether to use singlepath |
5709131c MS |
2288 | * or multipath case. |
2289 | */ | |
7cdb1a84 MS |
2290 | nexthop_num = 0; |
2291 | for (ALL_NEXTHOPS_PTR(dplane_ctx_get_ng(ctx), nexthop)) { | |
2292 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_RECURSIVE)) | |
2293 | continue; | |
b9c87515 | 2294 | if (!NEXTHOP_IS_ACTIVE(nexthop->flags)) |
7cdb1a84 MS |
2295 | continue; |
2296 | ||
2297 | nexthop_num++; | |
2298 | } | |
2299 | ||
2300 | /* Singlepath case. */ | |
220f0f42 | 2301 | if (nexthop_num == 1) { |
7cdb1a84 MS |
2302 | nexthop_num = 0; |
2303 | for (ALL_NEXTHOPS_PTR(dplane_ctx_get_ng(ctx), nexthop)) { | |
7cdb1a84 MS |
2304 | if (CHECK_FLAG(nexthop->flags, |
2305 | NEXTHOP_FLAG_RECURSIVE)) { | |
5709131c MS |
2306 | |
2307 | if (setsrc) | |
2308 | continue; | |
2309 | ||
b9c87515 RZ |
2310 | setsrc = nexthop_set_src(nexthop, p->family, |
2311 | &src); | |
f183e380 | 2312 | continue; |
7cdb1a84 MS |
2313 | } |
2314 | ||
b9c87515 | 2315 | if (NEXTHOP_IS_ACTIVE(nexthop->flags)) { |
7cdb1a84 MS |
2316 | routedesc = nexthop->rparent |
2317 | ? "recursive, single-path" | |
2318 | : "single-path"; | |
2319 | ||
63eaefa8 R |
2320 | if (!_netlink_set_tag(&req->n, datalen, tag)) |
2321 | return 0; | |
2322 | ||
0be6e7d7 JU |
2323 | if (!_netlink_route_build_singlepath( |
2324 | p, routedesc, bytelen, nexthop, | |
2325 | &req->n, &req->r, datalen, cmd)) | |
2326 | return 0; | |
7cdb1a84 MS |
2327 | nexthop_num++; |
2328 | break; | |
2329 | } | |
f2a0ba3a RZ |
2330 | |
2331 | /* | |
2332 | * Add encapsulation information when installing via | |
2333 | * FPM. | |
2334 | */ | |
0be6e7d7 JU |
2335 | if (fpm) { |
2336 | if (!netlink_route_nexthop_encap( | |
2337 | &req->n, datalen, nexthop)) | |
2338 | return 0; | |
2339 | } | |
7cdb1a84 | 2340 | } |
f2a0ba3a | 2341 | |
13e0321a | 2342 | if (setsrc) { |
0be6e7d7 JU |
2343 | if (p->family == AF_INET) { |
2344 | if (!nl_attr_put(&req->n, datalen, RTA_PREFSRC, | |
2345 | &src.ipv4, bytelen)) | |
2346 | return 0; | |
2347 | } else if (p->family == AF_INET6) { | |
2348 | if (!nl_attr_put(&req->n, datalen, RTA_PREFSRC, | |
2349 | &src.ipv6, bytelen)) | |
2350 | return 0; | |
2351 | } | |
7cdb1a84 MS |
2352 | } |
2353 | } else { /* Multipath case */ | |
312a6bee | 2354 | struct rtattr *nest; |
81793ac1 | 2355 | const union g_addr *src1 = NULL; |
7cdb1a84 | 2356 | |
312a6bee | 2357 | nest = nl_attr_nest(&req->n, datalen, RTA_MULTIPATH); |
0be6e7d7 JU |
2358 | if (nest == NULL) |
2359 | return 0; | |
7cdb1a84 MS |
2360 | |
2361 | nexthop_num = 0; | |
2362 | for (ALL_NEXTHOPS_PTR(dplane_ctx_get_ng(ctx), nexthop)) { | |
7cdb1a84 MS |
2363 | if (CHECK_FLAG(nexthop->flags, |
2364 | NEXTHOP_FLAG_RECURSIVE)) { | |
2365 | /* This only works for IPv4 now */ | |
5709131c MS |
2366 | if (setsrc) |
2367 | continue; | |
2368 | ||
b9c87515 RZ |
2369 | setsrc = nexthop_set_src(nexthop, p->family, |
2370 | &src); | |
78e54ded | 2371 | continue; |
7cdb1a84 MS |
2372 | } |
2373 | ||
b9c87515 | 2374 | if (NEXTHOP_IS_ACTIVE(nexthop->flags)) { |
7cdb1a84 MS |
2375 | routedesc = nexthop->rparent |
2376 | ? "recursive, multipath" | |
2377 | : "multipath"; | |
2378 | nexthop_num++; | |
2379 | ||
0be6e7d7 JU |
2380 | if (!_netlink_route_build_multipath( |
2381 | p, routedesc, bytelen, nexthop, | |
63eaefa8 R |
2382 | &req->n, datalen, &req->r, &src1, |
2383 | tag)) | |
0be6e7d7 | 2384 | return 0; |
7cdb1a84 MS |
2385 | |
2386 | if (!setsrc && src1) { | |
b9c87515 | 2387 | if (p->family == AF_INET) |
7cdb1a84 | 2388 | src.ipv4 = src1->ipv4; |
b9c87515 | 2389 | else if (p->family == AF_INET6) |
7cdb1a84 MS |
2390 | src.ipv6 = src1->ipv6; |
2391 | ||
2392 | setsrc = 1; | |
2393 | } | |
2394 | } | |
312a6bee | 2395 | } |
0be6e7d7 | 2396 | |
312a6bee JU |
2397 | nl_attr_nest_end(&req->n, nest); |
2398 | ||
2399 | /* | |
2400 | * Add encapsulation information when installing via | |
2401 | * FPM. | |
2402 | */ | |
2403 | if (fpm) { | |
2404 | for (ALL_NEXTHOPS_PTR(dplane_ctx_get_ng(ctx), | |
2405 | nexthop)) { | |
2406 | if (CHECK_FLAG(nexthop->flags, | |
2407 | NEXTHOP_FLAG_RECURSIVE)) | |
2408 | continue; | |
0be6e7d7 JU |
2409 | if (!netlink_route_nexthop_encap( |
2410 | &req->n, datalen, nexthop)) | |
2411 | return 0; | |
312a6bee | 2412 | } |
7cdb1a84 | 2413 | } |
f2a0ba3a | 2414 | |
312a6bee | 2415 | |
13e0321a | 2416 | if (setsrc) { |
0be6e7d7 JU |
2417 | if (p->family == AF_INET) { |
2418 | if (!nl_attr_put(&req->n, datalen, RTA_PREFSRC, | |
2419 | &src.ipv4, bytelen)) | |
2420 | return 0; | |
2421 | } else if (p->family == AF_INET6) { | |
2422 | if (!nl_attr_put(&req->n, datalen, RTA_PREFSRC, | |
2423 | &src.ipv6, bytelen)) | |
2424 | return 0; | |
2425 | } | |
7cdb1a84 MS |
2426 | if (IS_ZEBRA_DEBUG_KERNEL) |
2427 | zlog_debug("Setting source"); | |
2428 | } | |
7cdb1a84 MS |
2429 | } |
2430 | ||
2431 | /* If there is no useful nexthop then return. */ | |
2432 | if (nexthop_num == 0) { | |
2433 | if (IS_ZEBRA_DEBUG_KERNEL) | |
9266b315 | 2434 | zlog_debug("%s: No useful nexthop.", __func__); |
7cdb1a84 MS |
2435 | } |
2436 | ||
312a6bee | 2437 | return NLMSG_ALIGN(req->n.nlmsg_len); |
7cdb1a84 MS |
2438 | } |
2439 | ||
43b5cc5e | 2440 | int kernel_get_ipmr_sg_stats(struct zebra_vrf *zvrf, void *in) |
e3be0432 | 2441 | { |
5523c156 | 2442 | uint32_t actual_table; |
d62a17ae | 2443 | int suc = 0; |
2444 | struct mcast_route_data *mr = (struct mcast_route_data *)in; | |
bd8b9272 DS |
2445 | struct { |
2446 | struct nlmsghdr n; | |
31071fe3 | 2447 | struct rtmsg rtm; |
bd8b9272 DS |
2448 | char buf[256]; |
2449 | } req; | |
e3be0432 | 2450 | |
d62a17ae | 2451 | mroute = mr; |
5895d33f | 2452 | struct zebra_ns *zns; |
bd8b9272 | 2453 | |
009f8ad5 | 2454 | zns = zvrf->zns; |
5605ecfc | 2455 | memset(&req, 0, sizeof(req)); |
bd8b9272 | 2456 | |
31071fe3 | 2457 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)); |
bd8b9272 DS |
2458 | req.n.nlmsg_flags = NLM_F_REQUEST; |
2459 | req.n.nlmsg_pid = zns->netlink_cmd.snl.nl_pid; | |
2460 | ||
bd8b9272 DS |
2461 | req.n.nlmsg_type = RTM_GETROUTE; |
2462 | ||
4d3b4b18 | 2463 | if (mroute->family == AF_INET) { |
31071fe3 | 2464 | req.rtm.rtm_family = RTNL_FAMILY_IPMR; |
e1cd4bb1 DL |
2465 | req.rtm.rtm_dst_len = IPV4_MAX_BITLEN; |
2466 | req.rtm.rtm_src_len = IPV4_MAX_BITLEN; | |
2467 | ||
4d3b4b18 MR |
2468 | nl_attr_put(&req.n, sizeof(req), RTA_SRC, |
2469 | &mroute->src.ipaddr_v4, | |
2470 | sizeof(mroute->src.ipaddr_v4)); | |
2471 | nl_attr_put(&req.n, sizeof(req), RTA_DST, | |
2472 | &mroute->grp.ipaddr_v4, | |
2473 | sizeof(mroute->grp.ipaddr_v4)); | |
2474 | } else { | |
31071fe3 | 2475 | req.rtm.rtm_family = RTNL_FAMILY_IP6MR; |
e1cd4bb1 DL |
2476 | req.rtm.rtm_dst_len = IPV6_MAX_BITLEN; |
2477 | req.rtm.rtm_src_len = IPV6_MAX_BITLEN; | |
2478 | ||
4d3b4b18 MR |
2479 | nl_attr_put(&req.n, sizeof(req), RTA_SRC, |
2480 | &mroute->src.ipaddr_v6, | |
2481 | sizeof(mroute->src.ipaddr_v6)); | |
2482 | nl_attr_put(&req.n, sizeof(req), RTA_DST, | |
2483 | &mroute->grp.ipaddr_v6, | |
2484 | sizeof(mroute->grp.ipaddr_v6)); | |
2485 | } | |
2486 | ||
5523c156 DS |
2487 | /* |
2488 | * What? | |
2489 | * | |
2490 | * So during the namespace cleanup we started storing | |
2491 | * the zvrf table_id for the default table as RT_TABLE_MAIN | |
2492 | * which is what the normal routing table for ip routing is. | |
2493 | * This change caused this to break our lookups of sg data | |
2494 | * because prior to this change the zvrf->table_id was 0 | |
2495 | * and when the pim multicast kernel code saw a 0, | |
2496 | * it was auto-translated to RT_TABLE_DEFAULT. But since | |
2497 | * we are now passing in RT_TABLE_MAIN there is no auto-translation | |
2498 | * and the kernel goes screw you and the delicious cookies you | |
2499 | * are trying to give me. So now we have this little hack. | |
2500 | */ | |
e1cd4bb1 DL |
2501 | if (mroute->family == AF_INET) |
2502 | actual_table = (zvrf->table_id == RT_TABLE_MAIN) | |
2503 | ? RT_TABLE_DEFAULT | |
2504 | : zvrf->table_id; | |
2505 | else | |
2506 | actual_table = zvrf->table_id; | |
2507 | ||
a757997c | 2508 | nl_attr_put32(&req.n, sizeof(req), RTA_TABLE, actual_table); |
e3be0432 | 2509 | |
bd8b9272 | 2510 | suc = netlink_talk(netlink_route_change_read_multicast, &req.n, |
9bfadae8 | 2511 | &zns->netlink_cmd, zns, false); |
e3be0432 | 2512 | |
bd8b9272 | 2513 | mroute = NULL; |
d62a17ae | 2514 | return suc; |
e3be0432 DS |
2515 | } |
2516 | ||
8d03bc50 SW |
2517 | /* Char length to debug ID with */ |
2518 | #define ID_LENGTH 10 | |
2519 | ||
0be6e7d7 | 2520 | static bool _netlink_nexthop_build_group(struct nlmsghdr *n, size_t req_size, |
8d03bc50 | 2521 | uint32_t id, |
e22e8001 | 2522 | const struct nh_grp *z_grp, |
569e1411 DS |
2523 | const uint8_t count, bool resilient, |
2524 | const struct nhg_resilience *nhgr) | |
565ce0d3 | 2525 | { |
565ce0d3 | 2526 | struct nexthop_grp grp[count]; |
8d03bc50 SW |
2527 | /* Need space for max group size, "/", and null term */ |
2528 | char buf[(MULTIPATH_NUM * (ID_LENGTH + 1)) + 1]; | |
2529 | char buf1[ID_LENGTH + 2]; | |
2530 | ||
2531 | buf[0] = '\0'; | |
565ce0d3 SW |
2532 | |
2533 | memset(grp, 0, sizeof(grp)); | |
2534 | ||
2535 | if (count) { | |
0c8215cb | 2536 | for (int i = 0; i < count; i++) { |
e22e8001 | 2537 | grp[i].id = z_grp[i].id; |
df7fb580 | 2538 | grp[i].weight = z_grp[i].weight - 1; |
8d03bc50 SW |
2539 | |
2540 | if (IS_ZEBRA_DEBUG_KERNEL) { | |
2541 | if (i == 0) | |
2542 | snprintf(buf, sizeof(buf1), "group %u", | |
2543 | grp[i].id); | |
2544 | else { | |
2545 | snprintf(buf1, sizeof(buf1), "/%u", | |
2546 | grp[i].id); | |
2547 | strlcat(buf, buf1, sizeof(buf)); | |
2548 | } | |
2549 | } | |
565ce0d3 | 2550 | } |
0be6e7d7 JU |
2551 | if (!nl_attr_put(n, req_size, NHA_GROUP, grp, |
2552 | count * sizeof(*grp))) | |
2553 | return false; | |
569e1411 DS |
2554 | |
2555 | if (resilient) { | |
2556 | struct rtattr *nest; | |
2557 | ||
2558 | nest = nl_attr_nest(n, req_size, NHA_RES_GROUP); | |
2559 | ||
2560 | nl_attr_put16(n, req_size, NHA_RES_GROUP_BUCKETS, | |
2561 | nhgr->buckets); | |
2562 | nl_attr_put32(n, req_size, NHA_RES_GROUP_IDLE_TIMER, | |
2563 | nhgr->idle_timer * 1000); | |
2564 | nl_attr_put32(n, req_size, | |
2565 | NHA_RES_GROUP_UNBALANCED_TIMER, | |
2566 | nhgr->unbalanced_timer * 1000); | |
2567 | nl_attr_nest_end(n, nest); | |
2568 | ||
2569 | nl_attr_put16(n, req_size, NHA_GROUP_TYPE, | |
2570 | NEXTHOP_GRP_TYPE_RES); | |
2571 | } | |
565ce0d3 | 2572 | } |
8d03bc50 SW |
2573 | |
2574 | if (IS_ZEBRA_DEBUG_KERNEL) | |
2575 | zlog_debug("%s: ID (%u): %s", __func__, id, buf); | |
0be6e7d7 JU |
2576 | |
2577 | return true; | |
565ce0d3 SW |
2578 | } |
2579 | ||
f820d025 | 2580 | /** |
e9a1cd93 | 2581 | * Next hop packet encoding helper function. |
f820d025 | 2582 | * |
e9a1cd93 RZ |
2583 | * \param[in] cmd netlink command. |
2584 | * \param[in] ctx dataplane context (information snapshot). | |
2585 | * \param[out] buf buffer to hold the packet. | |
2586 | * \param[in] buflen amount of buffer bytes. | |
f820d025 | 2587 | * |
0be6e7d7 JU |
2588 | * \returns -1 on failure, 0 when the msg doesn't fit entirely in the buffer |
2589 | * otherwise the number of bytes written to buf. | |
f820d025 | 2590 | */ |
0be6e7d7 JU |
2591 | ssize_t netlink_nexthop_msg_encode(uint16_t cmd, |
2592 | const struct zebra_dplane_ctx *ctx, | |
45c12994 | 2593 | void *buf, size_t buflen, bool fpm) |
f820d025 | 2594 | { |
f820d025 SW |
2595 | struct { |
2596 | struct nlmsghdr n; | |
2597 | struct nhmsg nhm; | |
e9a1cd93 RZ |
2598 | char buf[]; |
2599 | } *req = buf; | |
f820d025 | 2600 | |
8d03bc50 SW |
2601 | mpls_lse_t out_lse[MPLS_MAX_LABELS]; |
2602 | char label_buf[256]; | |
2603 | int num_labels = 0; | |
72938edf SW |
2604 | uint32_t id = dplane_ctx_get_nhe_id(ctx); |
2605 | int type = dplane_ctx_get_nhe_type(ctx); | |
bdd085a8 MS |
2606 | struct rtattr *nest; |
2607 | uint16_t encap; | |
d4000d7b DS |
2608 | struct nlsock *nl = |
2609 | kernel_netlink_nlsock_lookup(dplane_ctx_get_ns_sock(ctx)); | |
72938edf SW |
2610 | |
2611 | if (!id) { | |
2612 | flog_err( | |
2613 | EC_ZEBRA_NHG_FIB_UPDATE, | |
2614 | "Failed trying to update a nexthop group in the kernel that does not have an ID"); | |
2615 | return -1; | |
2616 | } | |
81505946 | 2617 | |
6c67f41f SW |
2618 | /* |
2619 | * Nothing to do if the kernel doesn't support nexthop objects or | |
45c12994 YH |
2620 | * we dont want to install this type of NHG, but FPM may possible to |
2621 | * handle this. | |
6c67f41f | 2622 | */ |
45c12994 | 2623 | if (!fpm && !kernel_nexthops_supported()) { |
72938edf SW |
2624 | if (IS_ZEBRA_DEBUG_KERNEL || IS_ZEBRA_DEBUG_NHG) |
2625 | zlog_debug( | |
2626 | "%s: nhg_id %u (%s): kernel nexthops not supported, ignoring", | |
2627 | __func__, id, zebra_route_string(type)); | |
6c67f41f | 2628 | return 0; |
72938edf SW |
2629 | } |
2630 | ||
2631 | if (proto_nexthops_only() && !is_proto_nhg(id, type)) { | |
2632 | if (IS_ZEBRA_DEBUG_KERNEL || IS_ZEBRA_DEBUG_NHG) | |
2633 | zlog_debug( | |
2634 | "%s: nhg_id %u (%s): proto-based nexthops only, ignoring", | |
2635 | __func__, id, zebra_route_string(type)); | |
2636 | return 0; | |
2637 | } | |
6c67f41f | 2638 | |
8d03bc50 SW |
2639 | label_buf[0] = '\0'; |
2640 | ||
0be6e7d7 JU |
2641 | if (buflen < sizeof(*req)) |
2642 | return 0; | |
2643 | ||
2644 | memset(req, 0, sizeof(*req)); | |
f820d025 | 2645 | |
e9a1cd93 RZ |
2646 | req->n.nlmsg_len = NLMSG_LENGTH(sizeof(struct nhmsg)); |
2647 | req->n.nlmsg_flags = NLM_F_CREATE | NLM_F_REQUEST; | |
9a1588c4 SW |
2648 | |
2649 | if (cmd == RTM_NEWNEXTHOP) | |
e9a1cd93 | 2650 | req->n.nlmsg_flags |= NLM_F_REPLACE; |
9a1588c4 | 2651 | |
e9a1cd93 | 2652 | req->n.nlmsg_type = cmd; |
d4000d7b | 2653 | req->n.nlmsg_pid = nl->snl.nl_pid; |
f820d025 | 2654 | |
e9a1cd93 | 2655 | req->nhm.nh_family = AF_UNSPEC; |
fec211ad | 2656 | /* TODO: Scope? */ |
f820d025 | 2657 | |
0be6e7d7 JU |
2658 | if (!nl_attr_put32(&req->n, buflen, NHA_ID, id)) |
2659 | return 0; | |
f820d025 SW |
2660 | |
2661 | if (cmd == RTM_NEWNEXTHOP) { | |
bf1626a6 MS |
2662 | /* |
2663 | * We distinguish between a "group", which is a collection | |
2664 | * of ids, and a singleton nexthop with an id. The | |
2665 | * group is installed as an id that just refers to a list of | |
2666 | * other ids. | |
2667 | */ | |
0be6e7d7 | 2668 | if (dplane_ctx_get_nhe_nh_grp_count(ctx)) { |
569e1411 DS |
2669 | const struct nexthop_group *nhg; |
2670 | const struct nhg_resilience *nhgr; | |
2671 | ||
2672 | nhg = dplane_ctx_get_nhe_ng(ctx); | |
2673 | nhgr = &nhg->nhgr; | |
d52c949b | 2674 | if (!_netlink_nexthop_build_group( |
0be6e7d7 JU |
2675 | &req->n, buflen, id, |
2676 | dplane_ctx_get_nhe_nh_grp(ctx), | |
569e1411 DS |
2677 | dplane_ctx_get_nhe_nh_grp_count(ctx), |
2678 | !!nhgr->buckets, nhgr)) | |
0be6e7d7 JU |
2679 | return 0; |
2680 | } else { | |
0c8215cb SW |
2681 | const struct nexthop *nh = |
2682 | dplane_ctx_get_nhe_ng(ctx)->nexthop; | |
2683 | afi_t afi = dplane_ctx_get_nhe_afi(ctx); | |
e8b0e420 | 2684 | |
0c8215cb | 2685 | if (afi == AFI_IP) |
e9a1cd93 | 2686 | req->nhm.nh_family = AF_INET; |
0c8215cb | 2687 | else if (afi == AFI_IP6) |
e9a1cd93 | 2688 | req->nhm.nh_family = AF_INET6; |
f820d025 | 2689 | |
565ce0d3 | 2690 | switch (nh->type) { |
a6e6a6d8 | 2691 | case NEXTHOP_TYPE_IPV4: |
565ce0d3 | 2692 | case NEXTHOP_TYPE_IPV4_IFINDEX: |
0be6e7d7 JU |
2693 | if (!nl_attr_put(&req->n, buflen, NHA_GATEWAY, |
2694 | &nh->gate.ipv4, | |
2695 | IPV4_MAX_BYTELEN)) | |
2696 | return 0; | |
565ce0d3 | 2697 | break; |
a6e6a6d8 | 2698 | case NEXTHOP_TYPE_IPV6: |
565ce0d3 | 2699 | case NEXTHOP_TYPE_IPV6_IFINDEX: |
0be6e7d7 JU |
2700 | if (!nl_attr_put(&req->n, buflen, NHA_GATEWAY, |
2701 | &nh->gate.ipv6, | |
2702 | IPV6_MAX_BYTELEN)) | |
2703 | return 0; | |
565ce0d3 SW |
2704 | break; |
2705 | case NEXTHOP_TYPE_BLACKHOLE: | |
0be6e7d7 JU |
2706 | if (!nl_attr_put(&req->n, buflen, NHA_BLACKHOLE, |
2707 | NULL, 0)) | |
2708 | return 0; | |
8d03bc50 SW |
2709 | /* Blackhole shouldn't have anymore attributes |
2710 | */ | |
2711 | goto nexthop_done; | |
565ce0d3 SW |
2712 | case NEXTHOP_TYPE_IFINDEX: |
2713 | /* Don't need anymore info for this */ | |
2714 | break; | |
a6e6a6d8 SW |
2715 | } |
2716 | ||
2717 | if (!nh->ifindex) { | |
565ce0d3 SW |
2718 | flog_err( |
2719 | EC_ZEBRA_NHG_FIB_UPDATE, | |
2720 | "Context received for kernel nexthop update without an interface"); | |
2721 | return -1; | |
565ce0d3 SW |
2722 | } |
2723 | ||
0be6e7d7 JU |
2724 | if (!nl_attr_put32(&req->n, buflen, NHA_OIF, |
2725 | nh->ifindex)) | |
2726 | return 0; | |
8d03bc50 | 2727 | |
62d2ecb2 | 2728 | if (CHECK_FLAG(nh->flags, NEXTHOP_FLAG_ONLINK)) |
e9a1cd93 | 2729 | req->nhm.nh_flags |= RTNH_F_ONLINK; |
62d2ecb2 | 2730 | |
5fa6bfff SW |
2731 | num_labels = build_label_stack( |
2732 | nh->nh_label, nh->nh_label_type, out_lse, | |
2733 | label_buf, sizeof(label_buf)); | |
8d03bc50 | 2734 | |
e611f5da SW |
2735 | if (num_labels && nh->nh_label_type == ZEBRA_LSP_EVPN) { |
2736 | if (!nl_attr_put16(&req->n, buflen, | |
2737 | NHA_ENCAP_TYPE, | |
2738 | LWTUNNEL_ENCAP_IP)) | |
2739 | return 0; | |
2740 | ||
2741 | nest = nl_attr_nest(&req->n, buflen, NHA_ENCAP); | |
2742 | if (!nest) | |
2743 | return 0; | |
2744 | ||
2745 | if (_netlink_nexthop_encode_dvni_label( | |
2746 | nh, &req->n, out_lse, buflen, | |
2747 | label_buf) == false) | |
2748 | return 0; | |
2749 | ||
2750 | nl_attr_nest_end(&req->n, nest); | |
2751 | ||
2752 | } else if (num_labels) { | |
8d03bc50 SW |
2753 | /* Set the BoS bit */ |
2754 | out_lse[num_labels - 1] |= | |
2755 | htonl(1 << MPLS_LS_S_SHIFT); | |
2756 | ||
2757 | /* | |
2758 | * TODO: MPLS unsupported for now in kernel. | |
2759 | */ | |
e9a1cd93 | 2760 | if (req->nhm.nh_family == AF_MPLS) |
8d03bc50 | 2761 | goto nexthop_done; |
bdd085a8 MS |
2762 | |
2763 | encap = LWTUNNEL_ENCAP_MPLS; | |
2764 | if (!nl_attr_put16(&req->n, buflen, | |
2765 | NHA_ENCAP_TYPE, encap)) | |
2766 | return 0; | |
2767 | nest = nl_attr_nest(&req->n, buflen, NHA_ENCAP); | |
2768 | if (!nest) | |
2769 | return 0; | |
2770 | if (!nl_attr_put( | |
2771 | &req->n, buflen, MPLS_IPTUNNEL_DST, | |
2772 | &out_lse, | |
2773 | num_labels * sizeof(mpls_lse_t))) | |
2774 | return 0; | |
2775 | ||
2776 | nl_attr_nest_end(&req->n, nest); | |
8d03bc50 SW |
2777 | } |
2778 | ||
eab0f8f0 HS |
2779 | if (nh->nh_srv6) { |
2780 | if (nh->nh_srv6->seg6local_action != | |
2781 | ZEBRA_SEG6_LOCAL_ACTION_UNSPEC) { | |
2782 | uint32_t action; | |
2783 | uint16_t encap; | |
2784 | struct rtattr *nest; | |
2785 | const struct seg6local_context *ctx; | |
2786 | ||
2787 | req->nhm.nh_family = AF_INET6; | |
2788 | action = nh->nh_srv6->seg6local_action; | |
2789 | ctx = &nh->nh_srv6->seg6local_ctx; | |
2790 | encap = LWTUNNEL_ENCAP_SEG6_LOCAL; | |
2791 | if (!nl_attr_put(&req->n, buflen, | |
2792 | NHA_ENCAP_TYPE, | |
2793 | &encap, | |
2794 | sizeof(uint16_t))) | |
2795 | return 0; | |
8689b25a | 2796 | |
eab0f8f0 HS |
2797 | nest = nl_attr_nest(&req->n, buflen, |
2798 | NHA_ENCAP | NLA_F_NESTED); | |
2799 | if (!nest) | |
2800 | return 0; | |
52026569 | 2801 | |
eab0f8f0 HS |
2802 | switch (action) { |
2803 | case SEG6_LOCAL_ACTION_END: | |
2804 | if (!nl_attr_put32( | |
2805 | &req->n, buflen, | |
52026569 HS |
2806 | SEG6_LOCAL_ACTION, |
2807 | SEG6_LOCAL_ACTION_END)) | |
eab0f8f0 HS |
2808 | return 0; |
2809 | break; | |
2810 | case SEG6_LOCAL_ACTION_END_X: | |
2811 | if (!nl_attr_put32( | |
2812 | &req->n, buflen, | |
52026569 HS |
2813 | SEG6_LOCAL_ACTION, |
2814 | SEG6_LOCAL_ACTION_END_X)) | |
eab0f8f0 HS |
2815 | return 0; |
2816 | if (!nl_attr_put( | |
2817 | &req->n, buflen, | |
8689b25a | 2818 | SEG6_LOCAL_NH6, &ctx->nh6, |
52026569 | 2819 | sizeof(struct in6_addr))) |
eab0f8f0 HS |
2820 | return 0; |
2821 | break; | |
2822 | case SEG6_LOCAL_ACTION_END_T: | |
2823 | if (!nl_attr_put32( | |
2824 | &req->n, buflen, | |
52026569 HS |
2825 | SEG6_LOCAL_ACTION, |
2826 | SEG6_LOCAL_ACTION_END_T)) | |
eab0f8f0 HS |
2827 | return 0; |
2828 | if (!nl_attr_put32( | |
2829 | &req->n, buflen, | |
52026569 HS |
2830 | SEG6_LOCAL_TABLE, |
2831 | ctx->table)) | |
eab0f8f0 HS |
2832 | return 0; |
2833 | break; | |
2834 | case SEG6_LOCAL_ACTION_END_DX4: | |
2835 | if (!nl_attr_put32( | |
2836 | &req->n, buflen, | |
52026569 HS |
2837 | SEG6_LOCAL_ACTION, |
2838 | SEG6_LOCAL_ACTION_END_DX4)) | |
eab0f8f0 HS |
2839 | return 0; |
2840 | if (!nl_attr_put( | |
2841 | &req->n, buflen, | |
8689b25a | 2842 | SEG6_LOCAL_NH4, &ctx->nh4, |
52026569 | 2843 | sizeof(struct in_addr))) |
eab0f8f0 HS |
2844 | return 0; |
2845 | break; | |
2846 | case SEG6_LOCAL_ACTION_END_DT6: | |
2847 | if (!nl_attr_put32( | |
2848 | &req->n, buflen, | |
52026569 HS |
2849 | SEG6_LOCAL_ACTION, |
2850 | SEG6_LOCAL_ACTION_END_DT6)) | |
eab0f8f0 HS |
2851 | return 0; |
2852 | if (!nl_attr_put32( | |
2853 | &req->n, buflen, | |
52026569 HS |
2854 | SEG6_LOCAL_TABLE, |
2855 | ctx->table)) | |
eab0f8f0 HS |
2856 | return 0; |
2857 | break; | |
7eab60a7 RS |
2858 | case SEG6_LOCAL_ACTION_END_DT4: |
2859 | if (!nl_attr_put32( | |
2860 | &req->n, buflen, | |
2861 | SEG6_LOCAL_ACTION, | |
2862 | SEG6_LOCAL_ACTION_END_DT4)) | |
2863 | return 0; | |
2864 | if (!nl_attr_put32( | |
2865 | &req->n, buflen, | |
2866 | SEG6_LOCAL_VRFTABLE, | |
2867 | ctx->table)) | |
2868 | return 0; | |
2869 | break; | |
8bea07e4 CS |
2870 | case SEG6_LOCAL_ACTION_END_DT46: |
2871 | if (!nl_attr_put32( | |
2872 | &req->n, buflen, | |
2873 | SEG6_LOCAL_ACTION, | |
2874 | SEG6_LOCAL_ACTION_END_DT46)) | |
2875 | return 0; | |
2876 | if (!nl_attr_put32( | |
2877 | &req->n, buflen, | |
2878 | SEG6_LOCAL_VRFTABLE, | |
2879 | ctx->table)) | |
2880 | return 0; | |
2881 | break; | |
eab0f8f0 HS |
2882 | default: |
2883 | zlog_err("%s: unsupport seg6local behaviour action=%u", | |
2884 | __func__, action); | |
0a543b79 | 2885 | return 0; |
eab0f8f0 HS |
2886 | } |
2887 | nl_attr_nest_end(&req->n, nest); | |
8689b25a | 2888 | } |
8689b25a | 2889 | |
eab0f8f0 HS |
2890 | if (!sid_zero(&nh->nh_srv6->seg6_segs)) { |
2891 | char tun_buf[4096]; | |
2892 | ssize_t tun_len; | |
2893 | struct rtattr *nest; | |
76fb7ae4 | 2894 | |
eab0f8f0 HS |
2895 | if (!nl_attr_put16(&req->n, buflen, |
2896 | NHA_ENCAP_TYPE, | |
2897 | LWTUNNEL_ENCAP_SEG6)) | |
2898 | return 0; | |
2899 | nest = nl_attr_nest(&req->n, buflen, | |
2900 | NHA_ENCAP | NLA_F_NESTED); | |
2901 | if (!nest) | |
2902 | return 0; | |
2903 | tun_len = fill_seg6ipt_encap(tun_buf, | |
2904 | sizeof(tun_buf), | |
2905 | &nh->nh_srv6->seg6_segs); | |
2906 | if (tun_len < 0) | |
2907 | return 0; | |
2908 | if (!nl_attr_put(&req->n, buflen, | |
2909 | SEG6_IPTUNNEL_SRH, | |
2910 | tun_buf, tun_len)) | |
2911 | return 0; | |
2912 | nl_attr_nest_end(&req->n, nest); | |
2913 | } | |
76fb7ae4 HS |
2914 | } |
2915 | ||
bf1626a6 MS |
2916 | nexthop_done: |
2917 | ||
2918 | if (IS_ZEBRA_DEBUG_KERNEL) | |
2c77ddee DS |
2919 | zlog_debug("%s: ID (%u): %pNHv(%d) vrf %s(%u) %s ", |
2920 | __func__, id, nh, nh->ifindex, | |
bd47f3a3 JU |
2921 | vrf_id_to_name(nh->vrf_id), |
2922 | nh->vrf_id, label_buf); | |
bdd085a8 | 2923 | } |
f820d025 | 2924 | |
bdd085a8 | 2925 | req->nhm.nh_protocol = zebra2proto(type); |
f820d025 | 2926 | |
f820d025 SW |
2927 | } else if (cmd != RTM_DELNEXTHOP) { |
2928 | flog_err( | |
2929 | EC_ZEBRA_NHG_FIB_UPDATE, | |
2930 | "Nexthop group kernel update command (%d) does not exist", | |
2931 | cmd); | |
2932 | return -1; | |
2933 | } | |
2934 | ||
9266b315 RZ |
2935 | if (IS_ZEBRA_DEBUG_KERNEL) |
2936 | zlog_debug("%s: %s, id=%u", __func__, nl_msg_type_to_str(cmd), | |
2937 | id); | |
f820d025 | 2938 | |
e9a1cd93 | 2939 | return NLMSG_ALIGN(req->n.nlmsg_len); |
f820d025 SW |
2940 | } |
2941 | ||
67e3369e JU |
2942 | static ssize_t netlink_nexthop_msg_encoder(struct zebra_dplane_ctx *ctx, |
2943 | void *buf, size_t buflen) | |
f820d025 | 2944 | { |
bf1626a6 | 2945 | enum dplane_op_e op; |
98cda54a | 2946 | int cmd = 0; |
f820d025 | 2947 | |
bf1626a6 MS |
2948 | op = dplane_ctx_get_op(ctx); |
2949 | if (op == DPLANE_OP_NH_INSTALL || op == DPLANE_OP_NH_UPDATE) | |
f820d025 | 2950 | cmd = RTM_NEWNEXTHOP; |
bf1626a6 MS |
2951 | else if (op == DPLANE_OP_NH_DELETE) |
2952 | cmd = RTM_DELNEXTHOP; | |
2953 | else { | |
2954 | flog_err(EC_ZEBRA_NHG_FIB_UPDATE, | |
2955 | "Context received for kernel nexthop update with incorrect OP code (%u)", | |
2956 | op); | |
67e3369e | 2957 | return -1; |
f820d025 SW |
2958 | } |
2959 | ||
45c12994 | 2960 | return netlink_nexthop_msg_encode(cmd, ctx, buf, buflen, false); |
67e3369e JU |
2961 | } |
2962 | ||
67e3369e JU |
2963 | enum netlink_msg_status |
2964 | netlink_put_nexthop_update_msg(struct nl_batch *bth, | |
2965 | struct zebra_dplane_ctx *ctx) | |
2966 | { | |
e9a1cd93 RZ |
2967 | /* Nothing to do if the kernel doesn't support nexthop objects */ |
2968 | if (!kernel_nexthops_supported()) | |
67e3369e | 2969 | return FRR_NETLINK_SUCCESS; |
e9a1cd93 | 2970 | |
67e3369e JU |
2971 | return netlink_batch_add_msg(bth, ctx, netlink_nexthop_msg_encoder, |
2972 | false); | |
2973 | } | |
f820d025 | 2974 | |
67e3369e JU |
2975 | static ssize_t netlink_newroute_msg_encoder(struct zebra_dplane_ctx *ctx, |
2976 | void *buf, size_t buflen) | |
2977 | { | |
2978 | return netlink_route_multipath_msg_encode(RTM_NEWROUTE, ctx, buf, | |
2979 | buflen, false, false); | |
f820d025 SW |
2980 | } |
2981 | ||
67e3369e JU |
2982 | static ssize_t netlink_delroute_msg_encoder(struct zebra_dplane_ctx *ctx, |
2983 | void *buf, size_t buflen) | |
2984 | { | |
2985 | return netlink_route_multipath_msg_encode(RTM_DELROUTE, ctx, buf, | |
2986 | buflen, false, false); | |
2987 | } | |
2988 | ||
2989 | enum netlink_msg_status | |
2990 | netlink_put_route_update_msg(struct nl_batch *bth, struct zebra_dplane_ctx *ctx) | |
7cdb1a84 | 2991 | { |
67e3369e | 2992 | int cmd; |
7cdb1a84 MS |
2993 | const struct prefix *p = dplane_ctx_get_dest(ctx); |
2994 | ||
2995 | if (dplane_ctx_get_op(ctx) == DPLANE_OP_ROUTE_DELETE) { | |
2996 | cmd = RTM_DELROUTE; | |
2997 | } else if (dplane_ctx_get_op(ctx) == DPLANE_OP_ROUTE_INSTALL) { | |
2998 | cmd = RTM_NEWROUTE; | |
2999 | } else if (dplane_ctx_get_op(ctx) == DPLANE_OP_ROUTE_UPDATE) { | |
3000 | ||
3001 | if (p->family == AF_INET || v6_rr_semantics) { | |
3002 | /* Single 'replace' operation */ | |
fe5f21af DS |
3003 | |
3004 | /* | |
3005 | * With route replace semantics in place | |
3006 | * for v4 routes and the new route is a system | |
3007 | * route we do not install anything. | |
3008 | * The problem here is that the new system | |
3009 | * route should cause us to withdraw from | |
3010 | * the kernel the old non-system route | |
3011 | */ | |
67e3369e JU |
3012 | if (RSYSTEM_ROUTE(dplane_ctx_get_type(ctx)) |
3013 | && !RSYSTEM_ROUTE(dplane_ctx_get_old_type(ctx))) | |
6b390b3c | 3014 | return netlink_batch_add_msg( |
67e3369e JU |
3015 | bth, ctx, netlink_delroute_msg_encoder, |
3016 | true); | |
7cdb1a84 MS |
3017 | } else { |
3018 | /* | |
3019 | * So v6 route replace semantics are not in | |
3020 | * the kernel at this point as I understand it. | |
3021 | * so let's do a delete then an add. | |
3022 | * In the future once v6 route replace semantics | |
3023 | * are in we can figure out what to do here to | |
3024 | * allow working with old and new kernels. | |
3025 | * | |
3026 | * I'm also intentionally ignoring the failure case | |
3027 | * of the route delete. If that happens yeah we're | |
3028 | * screwed. | |
3029 | */ | |
67e3369e JU |
3030 | if (!RSYSTEM_ROUTE(dplane_ctx_get_old_type(ctx))) |
3031 | netlink_batch_add_msg( | |
3032 | bth, ctx, netlink_delroute_msg_encoder, | |
3033 | true); | |
7cdb1a84 MS |
3034 | } |
3035 | ||
67e3369e JU |
3036 | cmd = RTM_NEWROUTE; |
3037 | } else | |
3038 | return FRR_NETLINK_ERROR; | |
7cdb1a84 | 3039 | |
67e3369e JU |
3040 | if (RSYSTEM_ROUTE(dplane_ctx_get_type(ctx))) |
3041 | return FRR_NETLINK_SUCCESS; | |
0be6e7d7 | 3042 | |
67e3369e JU |
3043 | return netlink_batch_add_msg(bth, ctx, |
3044 | cmd == RTM_NEWROUTE | |
3045 | ? netlink_newroute_msg_encoder | |
3046 | : netlink_delroute_msg_encoder, | |
3047 | false); | |
3048 | } | |
7cdb1a84 | 3049 | |
d9f5b2f5 SW |
3050 | /** |
3051 | * netlink_nexthop_process_nh() - Parse the gatway/if info from a new nexthop | |
3052 | * | |
3053 | * @tb: Netlink RTA data | |
3054 | * @family: Address family in the nhmsg | |
8c0a24c1 | 3055 | * @ifp: Interface connected - this should be NULL, we fill it in |
d9f5b2f5 SW |
3056 | * @ns_id: Namspace id |
3057 | * | |
3058 | * Return: New nexthop | |
3059 | */ | |
e22e8001 SW |
3060 | static struct nexthop netlink_nexthop_process_nh(struct rtattr **tb, |
3061 | unsigned char family, | |
3062 | struct interface **ifp, | |
3063 | ns_id_t ns_id) | |
d9f5b2f5 | 3064 | { |
e22e8001 | 3065 | struct nexthop nh = {}; |
d9f5b2f5 | 3066 | void *gate = NULL; |
8e401b25 | 3067 | enum nexthop_types_t type = 0; |
e22e8001 SW |
3068 | int if_index = 0; |
3069 | size_t sz = 0; | |
7134ba70 | 3070 | struct interface *ifp_lookup; |
d9f5b2f5 SW |
3071 | |
3072 | if_index = *(int *)RTA_DATA(tb[NHA_OIF]); | |
3073 | ||
8e401b25 | 3074 | |
d9f5b2f5 SW |
3075 | if (tb[NHA_GATEWAY]) { |
3076 | switch (family) { | |
3077 | case AF_INET: | |
8e401b25 | 3078 | type = NEXTHOP_TYPE_IPV4_IFINDEX; |
d9f5b2f5 SW |
3079 | sz = 4; |
3080 | break; | |
3081 | case AF_INET6: | |
8e401b25 | 3082 | type = NEXTHOP_TYPE_IPV6_IFINDEX; |
d9f5b2f5 SW |
3083 | sz = 16; |
3084 | break; | |
3085 | default: | |
3086 | flog_warn( | |
3087 | EC_ZEBRA_BAD_NHG_MESSAGE, | |
c4239c05 | 3088 | "Nexthop gateway with bad address family (%d) received from kernel", |
d9f5b2f5 | 3089 | family); |
e22e8001 | 3090 | return nh; |
d9f5b2f5 SW |
3091 | } |
3092 | gate = RTA_DATA(tb[NHA_GATEWAY]); | |
e22e8001 | 3093 | } else |
8e401b25 | 3094 | type = NEXTHOP_TYPE_IFINDEX; |
d9f5b2f5 | 3095 | |
8e401b25 | 3096 | if (type) |
e22e8001 | 3097 | nh.type = type; |
8e401b25 SW |
3098 | |
3099 | if (gate) | |
e22e8001 | 3100 | memcpy(&(nh.gate), gate, sz); |
8e401b25 SW |
3101 | |
3102 | if (if_index) | |
e22e8001 | 3103 | nh.ifindex = if_index; |
8e401b25 | 3104 | |
7134ba70 DS |
3105 | ifp_lookup = |
3106 | if_lookup_by_index_per_ns(zebra_ns_lookup(ns_id), nh.ifindex); | |
3107 | ||
e22e8001 | 3108 | if (ifp) |
7134ba70 DS |
3109 | *ifp = ifp_lookup; |
3110 | if (ifp_lookup) | |
096f7609 | 3111 | nh.vrf_id = ifp_lookup->vrf->vrf_id; |
e22e8001 | 3112 | else { |
d9f5b2f5 SW |
3113 | flog_warn( |
3114 | EC_ZEBRA_UNKNOWN_INTERFACE, | |
3115 | "%s: Unknown nexthop interface %u received, defaulting to VRF_DEFAULT", | |
15569c58 | 3116 | __func__, nh.ifindex); |
d9f5b2f5 | 3117 | |
e22e8001 | 3118 | nh.vrf_id = VRF_DEFAULT; |
d9f5b2f5 SW |
3119 | } |
3120 | ||
3121 | if (tb[NHA_ENCAP] && tb[NHA_ENCAP_TYPE]) { | |
3122 | uint16_t encap_type = *(uint16_t *)RTA_DATA(tb[NHA_ENCAP_TYPE]); | |
3123 | int num_labels = 0; | |
6e728764 | 3124 | |
d9f5b2f5 SW |
3125 | mpls_label_t labels[MPLS_MAX_LABELS] = {0}; |
3126 | ||
e22e8001 | 3127 | if (encap_type == LWTUNNEL_ENCAP_MPLS) |
d9f5b2f5 | 3128 | num_labels = parse_encap_mpls(tb[NHA_ENCAP], labels); |
d9f5b2f5 | 3129 | |
e22e8001 SW |
3130 | if (num_labels) |
3131 | nexthop_add_labels(&nh, ZEBRA_LSP_STATIC, num_labels, | |
d9f5b2f5 | 3132 | labels); |
d9f5b2f5 SW |
3133 | } |
3134 | ||
3135 | return nh; | |
3136 | } | |
3137 | ||
85f5e761 | 3138 | static int netlink_nexthop_process_group(struct rtattr **tb, |
569e1411 DS |
3139 | struct nh_grp *z_grp, int z_grp_size, |
3140 | struct nhg_resilience *nhgr) | |
d9f5b2f5 | 3141 | { |
e22e8001 SW |
3142 | uint8_t count = 0; |
3143 | /* linux/nexthop.h group struct */ | |
d9f5b2f5 SW |
3144 | struct nexthop_grp *n_grp = NULL; |
3145 | ||
85f5e761 | 3146 | n_grp = (struct nexthop_grp *)RTA_DATA(tb[NHA_GROUP]); |
d9f5b2f5 SW |
3147 | count = (RTA_PAYLOAD(tb[NHA_GROUP]) / sizeof(*n_grp)); |
3148 | ||
3149 | if (!count || (count * sizeof(*n_grp)) != RTA_PAYLOAD(tb[NHA_GROUP])) { | |
3150 | flog_warn(EC_ZEBRA_BAD_NHG_MESSAGE, | |
3151 | "Invalid nexthop group received from the kernel"); | |
85f5e761 | 3152 | return count; |
d9f5b2f5 SW |
3153 | } |
3154 | ||
5a935f79 | 3155 | for (int i = 0; ((i < count) && (i < z_grp_size)); i++) { |
e22e8001 | 3156 | z_grp[i].id = n_grp[i].id; |
df7fb580 | 3157 | z_grp[i].weight = n_grp[i].weight + 1; |
85f5e761 | 3158 | } |
569e1411 DS |
3159 | |
3160 | memset(nhgr, 0, sizeof(*nhgr)); | |
3161 | if (tb[NHA_RES_GROUP]) { | |
3162 | struct rtattr *tbn[NHA_RES_GROUP_MAX + 1]; | |
3163 | struct rtattr *rta; | |
3164 | struct rtattr *res_group = tb[NHA_RES_GROUP]; | |
3165 | ||
3166 | netlink_parse_rtattr_nested(tbn, NHA_RES_GROUP_MAX, res_group); | |
3167 | ||
3168 | if (tbn[NHA_RES_GROUP_BUCKETS]) { | |
3169 | rta = tbn[NHA_RES_GROUP_BUCKETS]; | |
3170 | nhgr->buckets = *(uint16_t *)RTA_DATA(rta); | |
3171 | } | |
3172 | ||
3173 | if (tbn[NHA_RES_GROUP_IDLE_TIMER]) { | |
3174 | rta = tbn[NHA_RES_GROUP_IDLE_TIMER]; | |
3175 | nhgr->idle_timer = *(uint32_t *)RTA_DATA(rta); | |
3176 | } | |
3177 | ||
3178 | if (tbn[NHA_RES_GROUP_UNBALANCED_TIMER]) { | |
3179 | rta = tbn[NHA_RES_GROUP_UNBALANCED_TIMER]; | |
3180 | nhgr->unbalanced_timer = *(uint32_t *)RTA_DATA(rta); | |
3181 | } | |
3182 | ||
3183 | if (tbn[NHA_RES_GROUP_UNBALANCED_TIME]) { | |
3184 | rta = tbn[NHA_RES_GROUP_UNBALANCED_TIME]; | |
3185 | nhgr->unbalanced_time = *(uint64_t *)RTA_DATA(rta); | |
3186 | } | |
3187 | } | |
3188 | ||
d9f5b2f5 SW |
3189 | return count; |
3190 | } | |
3191 | ||
3192 | /** | |
3193 | * netlink_nexthop_change() - Read in change about nexthops from the kernel | |
3194 | * | |
3195 | * @h: Netlink message header | |
3196 | * @ns_id: Namspace id | |
3197 | * @startup: Are we reading under startup conditions? | |
3198 | * | |
3199 | * Return: Result status | |
3200 | */ | |
3201 | int netlink_nexthop_change(struct nlmsghdr *h, ns_id_t ns_id, int startup) | |
3202 | { | |
3203 | int len; | |
3204 | /* nexthop group id */ | |
3205 | uint32_t id; | |
3206 | unsigned char family; | |
38e40db1 | 3207 | int type; |
e8b0e420 | 3208 | afi_t afi = AFI_UNSPEC; |
946de1b9 | 3209 | vrf_id_t vrf_id = VRF_DEFAULT; |
8c0a24c1 | 3210 | struct interface *ifp = NULL; |
d9f5b2f5 | 3211 | struct nhmsg *nhm = NULL; |
e22e8001 SW |
3212 | struct nexthop nh = {}; |
3213 | struct nh_grp grp[MULTIPATH_NUM] = {}; | |
85f5e761 | 3214 | /* Count of nexthops in group array */ |
e22e8001 | 3215 | uint8_t grp_count = 0; |
e22e8001 | 3216 | struct rtattr *tb[NHA_MAX + 1] = {}; |
d9f5b2f5 | 3217 | |
1d80c209 DS |
3218 | frrtrace(3, frr_zebra, netlink_nexthop_change, h, ns_id, startup); |
3219 | ||
d9f5b2f5 SW |
3220 | nhm = NLMSG_DATA(h); |
3221 | ||
88cafda7 DS |
3222 | if (ns_id) |
3223 | vrf_id = ns_id; | |
3224 | ||
d9f5b2f5 SW |
3225 | if (startup && h->nlmsg_type != RTM_NEWNEXTHOP) |
3226 | return 0; | |
3227 | ||
3228 | len = h->nlmsg_len - NLMSG_LENGTH(sizeof(struct nhmsg)); | |
3229 | if (len < 0) { | |
3230 | zlog_warn( | |
3231 | "%s: Message received from netlink is of a broken size %d %zu", | |
15569c58 | 3232 | __func__, h->nlmsg_len, |
d9f5b2f5 SW |
3233 | (size_t)NLMSG_LENGTH(sizeof(struct nhmsg))); |
3234 | return -1; | |
3235 | } | |
3236 | ||
6e1e2e8d DS |
3237 | netlink_parse_rtattr_flags(tb, NHA_MAX, RTM_NHA(nhm), len, |
3238 | NLA_F_NESTED); | |
d9f5b2f5 SW |
3239 | |
3240 | ||
3241 | if (!tb[NHA_ID]) { | |
3242 | flog_warn( | |
3243 | EC_ZEBRA_BAD_NHG_MESSAGE, | |
3244 | "Nexthop group without an ID received from the kernel"); | |
3245 | return -1; | |
3246 | } | |
3247 | ||
3248 | /* We use the ID key'd nhg table for kernel updates */ | |
3249 | id = *((uint32_t *)RTA_DATA(tb[NHA_ID])); | |
d9f5b2f5 | 3250 | |
506efd37 AK |
3251 | if (zebra_evpn_mh_is_fdb_nh(id)) { |
3252 | /* If this is a L2 NH just ignore it */ | |
3253 | if (IS_ZEBRA_DEBUG_KERNEL || IS_ZEBRA_DEBUG_EVPN_MH_NH) { | |
3254 | zlog_debug("Ignore kernel update (%u) for fdb-nh 0x%x", | |
3255 | h->nlmsg_type, id); | |
3256 | } | |
3257 | return 0; | |
3258 | } | |
3259 | ||
e8b0e420 | 3260 | family = nhm->nh_family; |
e8b0e420 SW |
3261 | afi = family2afi(family); |
3262 | ||
38e40db1 SW |
3263 | type = proto2zebra(nhm->nh_protocol, 0, true); |
3264 | ||
fdee485a SW |
3265 | if (IS_ZEBRA_DEBUG_KERNEL) |
3266 | zlog_debug("%s ID (%u) %s NS %u", | |
3267 | nl_msg_type_to_str(h->nlmsg_type), id, | |
3268 | nl_family_to_str(family), ns_id); | |
3269 | ||
3270 | ||
d9f5b2f5 | 3271 | if (h->nlmsg_type == RTM_NEWNEXTHOP) { |
569e1411 DS |
3272 | struct nhg_resilience nhgr = {}; |
3273 | ||
d9f5b2f5 SW |
3274 | if (tb[NHA_GROUP]) { |
3275 | /** | |
3276 | * If this is a group message its only going to have | |
3277 | * an array of nexthop IDs associated with it | |
3278 | */ | |
5a935f79 | 3279 | grp_count = netlink_nexthop_process_group( |
569e1411 | 3280 | tb, grp, array_size(grp), &nhgr); |
85f5e761 SW |
3281 | } else { |
3282 | if (tb[NHA_BLACKHOLE]) { | |
3283 | /** | |
3284 | * This nexthop is just for blackhole-ing | |
3285 | * traffic, it should not have an OIF, GATEWAY, | |
3286 | * or ENCAP | |
3287 | */ | |
e22e8001 SW |
3288 | nh.type = NEXTHOP_TYPE_BLACKHOLE; |
3289 | nh.bh_type = BLACKHOLE_UNSPEC; | |
3290 | } else if (tb[NHA_OIF]) | |
85f5e761 SW |
3291 | /** |
3292 | * This is a true new nexthop, so we need | |
3293 | * to parse the gateway and device info | |
3294 | */ | |
3295 | nh = netlink_nexthop_process_nh(tb, family, | |
3296 | &ifp, ns_id); | |
e22e8001 SW |
3297 | else { |
3298 | ||
8e401b25 SW |
3299 | flog_warn( |
3300 | EC_ZEBRA_BAD_NHG_MESSAGE, | |
3301 | "Invalid Nexthop message received from the kernel with ID (%u)", | |
3302 | id); | |
3303 | return -1; | |
3304 | } | |
e22e8001 SW |
3305 | SET_FLAG(nh.flags, NEXTHOP_FLAG_ACTIVE); |
3306 | if (nhm->nh_flags & RTNH_F_ONLINK) | |
3307 | SET_FLAG(nh.flags, NEXTHOP_FLAG_ONLINK); | |
3308 | vrf_id = nh.vrf_id; | |
d9f5b2f5 SW |
3309 | } |
3310 | ||
38e40db1 | 3311 | if (zebra_nhg_kernel_find(id, &nh, grp, grp_count, vrf_id, afi, |
569e1411 | 3312 | type, startup, &nhgr)) |
e22e8001 | 3313 | return -1; |
8e401b25 | 3314 | |
9a1588c4 | 3315 | } else if (h->nlmsg_type == RTM_DELNEXTHOP) |
88cafda7 | 3316 | zebra_nhg_kernel_del(id, vrf_id); |
d9f5b2f5 | 3317 | |
d9f5b2f5 SW |
3318 | return 0; |
3319 | } | |
3320 | ||
3321 | /** | |
3322 | * netlink_request_nexthop() - Request nextop information from the kernel | |
3323 | * @zns: Zebra namespace | |
3324 | * @family: AF_* netlink family | |
3325 | * @type: RTM_* route type | |
3326 | * | |
3327 | * Return: Result status | |
3328 | */ | |
3329 | static int netlink_request_nexthop(struct zebra_ns *zns, int family, int type) | |
3330 | { | |
3331 | struct { | |
3332 | struct nlmsghdr n; | |
3333 | struct nhmsg nhm; | |
3334 | } req; | |
3335 | ||
3336 | /* Form the request, specifying filter (rtattr) if needed. */ | |
3337 | memset(&req, 0, sizeof(req)); | |
3338 | req.n.nlmsg_type = type; | |
3339 | req.n.nlmsg_flags = NLM_F_ROOT | NLM_F_MATCH | NLM_F_REQUEST; | |
3340 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct nhmsg)); | |
3341 | req.nhm.nh_family = family; | |
3342 | ||
fd3f8e52 | 3343 | return netlink_request(&zns->netlink_cmd, &req); |
d9f5b2f5 SW |
3344 | } |
3345 | ||
7d5bb02b | 3346 | |
d9f5b2f5 SW |
3347 | /** |
3348 | * netlink_nexthop_read() - Nexthop read function using netlink interface | |
3349 | * | |
3350 | * @zns: Zebra name space | |
3351 | * | |
3352 | * Return: Result status | |
3353 | * Only called at bootstrap time. | |
3354 | */ | |
3355 | int netlink_nexthop_read(struct zebra_ns *zns) | |
3356 | { | |
3357 | int ret; | |
3358 | struct zebra_dplane_info dp_info; | |
3359 | ||
3360 | zebra_dplane_info_from_zns(&dp_info, zns, true /*is_cmd*/); | |
3361 | ||
3362 | /* Get nexthop objects */ | |
3363 | ret = netlink_request_nexthop(zns, AF_UNSPEC, RTM_GETNEXTHOP); | |
3364 | if (ret < 0) | |
3365 | return ret; | |
3366 | ret = netlink_parse_info(netlink_nexthop_change, &zns->netlink_cmd, | |
9bfadae8 | 3367 | &dp_info, 0, true); |
81505946 SW |
3368 | |
3369 | if (!ret) | |
3370 | /* If we succesfully read in nexthop objects, | |
3371 | * this kernel must support them. | |
3372 | */ | |
3373 | supports_nh = true; | |
7c99d51b MS |
3374 | if (IS_ZEBRA_DEBUG_KERNEL || IS_ZEBRA_DEBUG_NHG) |
3375 | zlog_debug("Nexthop objects %ssupported on this kernel", | |
3376 | supports_nh ? "" : "not "); | |
090ee856 DS |
3377 | |
3378 | zebra_router_set_supports_nhgs(supports_nh); | |
81505946 | 3379 | |
60e0eaee | 3380 | return ret; |
d9f5b2f5 SW |
3381 | } |
3382 | ||
3383 | ||
05657ec2 PG |
3384 | int kernel_neigh_update(int add, int ifindex, void *addr, char *lla, int llalen, |
3385 | ns_id_t ns_id, uint8_t family, bool permanent) | |
6b8a5694 | 3386 | { |
d62a17ae | 3387 | return netlink_neigh_update(add ? RTM_NEWNEIGH : RTM_DELNEIGH, ifindex, |
05657ec2 PG |
3388 | addr, lla, llalen, ns_id, family, permanent, |
3389 | RTPROT_ZEBRA); | |
6b8a5694 | 3390 | } |
718e3744 | 3391 | |
340845e2 | 3392 | /** |
0be6e7d7 JU |
3393 | * netlink_neigh_update_msg_encode() - Common helper api for encoding |
3394 | * evpn neighbor update as netlink messages using dataplane context object. | |
bbd4285b | 3395 | * Here, a neighbor refers to a bridge forwarding database entry for |
3396 | * either unicast forwarding or head-end replication or an IP neighbor | |
3397 | * entry. | |
340845e2 JU |
3398 | * @ctx: Dataplane context |
3399 | * @cmd: Netlink command (RTM_NEWNEIGH or RTM_DELNEIGH) | |
0a27a2fe PG |
3400 | * @lla: A pointer to neighbor cache link layer address |
3401 | * @llalen: Length of the pointer to neighbor cache link layer | |
3402 | * address | |
340845e2 | 3403 | * @ip: A neighbor cache n/w layer destination address |
bbd4285b | 3404 | * In the case of bridge FDB, this represnts the remote |
3405 | * VTEP IP. | |
340845e2 JU |
3406 | * @replace_obj: Whether NEW request should replace existing object or |
3407 | * add to the end of the list | |
3408 | * @family: AF_* netlink family | |
3409 | * @type: RTN_* route type | |
3410 | * @flags: NTF_* flags | |
3411 | * @state: NUD_* states | |
d4d4ec1c RZ |
3412 | * @data: data buffer pointer |
3413 | * @datalen: total amount of data buffer space | |
0a27a2fe | 3414 | * @protocol: protocol information |
340845e2 | 3415 | * |
0be6e7d7 JU |
3416 | * Return: 0 when the msg doesn't fit entirely in the buffer |
3417 | * otherwise the number of bytes written to buf. | |
13d60d35 | 3418 | */ |
0be6e7d7 | 3419 | static ssize_t netlink_neigh_update_msg_encode( |
0a27a2fe PG |
3420 | const struct zebra_dplane_ctx *ctx, int cmd, const void *lla, |
3421 | int llalen, const struct ipaddr *ip, bool replace_obj, uint8_t family, | |
3422 | uint8_t type, uint8_t flags, uint16_t state, uint32_t nhg_id, bool nfy, | |
ccd187cd | 3423 | uint8_t nfy_flags, bool ext, uint32_t ext_flags, void *data, |
0a27a2fe | 3424 | size_t datalen, uint8_t protocol) |
13d60d35 | 3425 | { |
d62a17ae | 3426 | struct { |
3427 | struct nlmsghdr n; | |
3428 | struct ndmsg ndm; | |
d4d4ec1c RZ |
3429 | char buf[]; |
3430 | } *req = data; | |
340845e2 JU |
3431 | int ipa_len; |
3432 | enum dplane_op_e op; | |
d62a17ae | 3433 | |
0be6e7d7 JU |
3434 | if (datalen < sizeof(*req)) |
3435 | return 0; | |
45c80fbd | 3436 | memset(req, 0, sizeof(*req)); |
d62a17ae | 3437 | |
340845e2 JU |
3438 | op = dplane_ctx_get_op(ctx); |
3439 | ||
d4d4ec1c RZ |
3440 | req->n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)); |
3441 | req->n.nlmsg_flags = NLM_F_REQUEST; | |
d62a17ae | 3442 | if (cmd == RTM_NEWNEIGH) |
d4d4ec1c | 3443 | req->n.nlmsg_flags |= |
340845e2 JU |
3444 | NLM_F_CREATE |
3445 | | (replace_obj ? NLM_F_REPLACE : NLM_F_APPEND); | |
d4d4ec1c RZ |
3446 | req->n.nlmsg_type = cmd; |
3447 | req->ndm.ndm_family = family; | |
3448 | req->ndm.ndm_type = type; | |
3449 | req->ndm.ndm_state = state; | |
3450 | req->ndm.ndm_flags = flags; | |
3451 | req->ndm.ndm_ifindex = dplane_ctx_get_ifindex(ctx); | |
d62a17ae | 3452 | |
45c80fbd | 3453 | if (!nl_attr_put(&req->n, datalen, NDA_PROTOCOL, &protocol, |
0be6e7d7 JU |
3454 | sizeof(protocol))) |
3455 | return 0; | |
3456 | ||
0a27a2fe PG |
3457 | if (lla) { |
3458 | if (!nl_attr_put(&req->n, datalen, NDA_LLADDR, lla, llalen)) | |
0be6e7d7 JU |
3459 | return 0; |
3460 | } | |
13d60d35 | 3461 | |
f188e68e | 3462 | if (nfy) { |
4bcdb608 NA |
3463 | struct rtattr *nest; |
3464 | ||
3465 | nest = nl_attr_nest(&req->n, datalen, | |
3466 | NDA_FDB_EXT_ATTRS | NLA_F_NESTED); | |
3467 | if (!nest) | |
3468 | return 0; | |
3469 | ||
3470 | if (!nl_attr_put(&req->n, datalen, NFEA_ACTIVITY_NOTIFY, | |
3471 | &nfy_flags, sizeof(nfy_flags))) | |
f188e68e | 3472 | return 0; |
4bcdb608 NA |
3473 | if (!nl_attr_put(&req->n, datalen, NFEA_DONT_REFRESH, NULL, 0)) |
3474 | return 0; | |
3475 | ||
3476 | nl_attr_nest_end(&req->n, nest); | |
f188e68e | 3477 | } |
506efd37 | 3478 | |
4bcdb608 | 3479 | |
ccd187cd AK |
3480 | if (ext) { |
3481 | if (!nl_attr_put(&req->n, datalen, NDA_EXT_FLAGS, &ext_flags, | |
3482 | sizeof(ext_flags))) | |
3483 | return 0; | |
3484 | } | |
3485 | ||
80e19eb7 AK |
3486 | if (nhg_id) { |
3487 | if (!nl_attr_put32(&req->n, datalen, NDA_NH_ID, nhg_id)) | |
3488 | return 0; | |
3489 | } else { | |
3490 | ipa_len = | |
3491 | IS_IPADDR_V4(ip) ? IPV4_MAX_BYTELEN : IPV6_MAX_BYTELEN; | |
3492 | if (!nl_attr_put(&req->n, datalen, NDA_DST, &ip->ip.addr, | |
3493 | ipa_len)) | |
3494 | return 0; | |
3495 | } | |
340845e2 JU |
3496 | |
3497 | if (op == DPLANE_OP_MAC_INSTALL || op == DPLANE_OP_MAC_DELETE) { | |
3498 | vlanid_t vid = dplane_ctx_mac_get_vlan(ctx); | |
b95ce8fa | 3499 | vni_t vni = dplane_ctx_mac_get_vni(ctx); |
13d60d35 | 3500 | |
0be6e7d7 JU |
3501 | if (vid > 0) { |
3502 | if (!nl_attr_put16(&req->n, datalen, NDA_VLAN, vid)) | |
3503 | return 0; | |
3504 | } | |
13d60d35 | 3505 | |
b95ce8fa SR |
3506 | if (vni > 0) { |
3507 | if (!nl_attr_put32(&req->n, datalen, NDA_SRC_VNI, vni)) | |
3508 | return 0; | |
3509 | } | |
3510 | ||
0be6e7d7 JU |
3511 | if (!nl_attr_put32(&req->n, datalen, NDA_MASTER, |
3512 | dplane_ctx_mac_get_br_ifindex(ctx))) | |
3513 | return 0; | |
340845e2 | 3514 | } |
13d60d35 | 3515 | |
b95ce8fa SR |
3516 | if (op == DPLANE_OP_VTEP_ADD || op == DPLANE_OP_VTEP_DELETE) { |
3517 | vni_t vni = dplane_ctx_neigh_get_vni(ctx); | |
3518 | ||
3519 | if (vni > 0) { | |
3520 | if (!nl_attr_put32(&req->n, datalen, NDA_SRC_VNI, vni)) | |
3521 | return 0; | |
3522 | } | |
3523 | } | |
3524 | ||
d4d4ec1c | 3525 | return NLMSG_ALIGN(req->n.nlmsg_len); |
13d60d35 | 3526 | } |
3527 | ||
340845e2 JU |
3528 | /* |
3529 | * Add remote VTEP to the flood list for this VxLAN interface (VNI). This | |
3530 | * is done by adding an FDB entry with a MAC of 00:00:00:00:00:00. | |
3531 | */ | |
67e3369e JU |
3532 | static ssize_t |
3533 | netlink_vxlan_flood_update_ctx(const struct zebra_dplane_ctx *ctx, int cmd, | |
3534 | void *buf, size_t buflen) | |
340845e2 JU |
3535 | { |
3536 | struct ethaddr dst_mac = {.octet = {0}}; | |
88217099 PG |
3537 | int proto = RTPROT_ZEBRA; |
3538 | ||
3539 | if (dplane_ctx_get_type(ctx) != 0) | |
3540 | proto = zebra2proto(dplane_ctx_get_type(ctx)); | |
d4d4ec1c | 3541 | |
67e3369e | 3542 | return netlink_neigh_update_msg_encode( |
0a27a2fe PG |
3543 | ctx, cmd, (const void *)&dst_mac, ETH_ALEN, |
3544 | dplane_ctx_neigh_get_ipaddr(ctx), false, PF_BRIDGE, 0, NTF_SELF, | |
3545 | (NUD_NOARP | NUD_PERMANENT), 0 /*nhg*/, false /*nfy*/, | |
3546 | 0 /*nfy_flags*/, false /*ext*/, 0 /*ext_flags*/, buf, buflen, | |
88217099 | 3547 | proto); |
340845e2 JU |
3548 | } |
3549 | ||
2232a77c | 3550 | #ifndef NDA_RTA |
d62a17ae | 3551 | #define NDA_RTA(r) \ |
3552 | ((struct rtattr *)(((char *)(r)) + NLMSG_ALIGN(sizeof(struct ndmsg)))) | |
2232a77c | 3553 | #endif |
3554 | ||
2414abd3 | 3555 | static int netlink_macfdb_change(struct nlmsghdr *h, int len, ns_id_t ns_id) |
2232a77c | 3556 | { |
d62a17ae | 3557 | struct ndmsg *ndm; |
3558 | struct interface *ifp; | |
3559 | struct zebra_if *zif; | |
d62a17ae | 3560 | struct rtattr *tb[NDA_MAX + 1]; |
3561 | struct interface *br_if; | |
3562 | struct ethaddr mac; | |
3563 | vlanid_t vid = 0; | |
4b3f26f4 | 3564 | struct in_addr vtep_ip; |
d62a17ae | 3565 | int vid_present = 0, dst_present = 0; |
d62a17ae | 3566 | char vid_buf[20]; |
3567 | char dst_buf[30]; | |
a37f4598 | 3568 | bool sticky; |
f188e68e AK |
3569 | bool local_inactive = false; |
3570 | bool dp_static = false; | |
784d88aa | 3571 | vni_t vni = 0; |
f188e68e | 3572 | uint32_t nhg_id = 0; |
784d88aa | 3573 | bool vni_mcast_grp = false; |
d62a17ae | 3574 | |
3575 | ndm = NLMSG_DATA(h); | |
3576 | ||
2853fed6 | 3577 | /* We only process macfdb notifications if EVPN is enabled */ |
3578 | if (!is_evpn_enabled()) | |
3579 | return 0; | |
3580 | ||
4b3f26f4 | 3581 | /* Parse attributes and extract fields of interest. Do basic |
3582 | * validation of the fields. | |
3583 | */ | |
4bcdb608 NA |
3584 | netlink_parse_rtattr_flags(tb, NDA_MAX, NDA_RTA(ndm), len, |
3585 | NLA_F_NESTED); | |
d62a17ae | 3586 | |
3587 | if (!tb[NDA_LLADDR]) { | |
28bd0652 | 3588 | if (IS_ZEBRA_DEBUG_KERNEL) |
4b3f26f4 | 3589 | zlog_debug("%s AF_BRIDGE IF %u - no LLADDR", |
28bd0652 | 3590 | nl_msg_type_to_str(h->nlmsg_type), |
4b3f26f4 | 3591 | ndm->ndm_ifindex); |
d62a17ae | 3592 | return 0; |
3593 | } | |
3594 | ||
ff8b7eb8 | 3595 | if (RTA_PAYLOAD(tb[NDA_LLADDR]) != ETH_ALEN) { |
28bd0652 DS |
3596 | if (IS_ZEBRA_DEBUG_KERNEL) |
3597 | zlog_debug( | |
4b3f26f4 | 3598 | "%s AF_BRIDGE IF %u - LLADDR is not MAC, len %lu", |
3599 | nl_msg_type_to_str(h->nlmsg_type), ndm->ndm_ifindex, | |
28bd0652 | 3600 | (unsigned long)RTA_PAYLOAD(tb[NDA_LLADDR])); |
d62a17ae | 3601 | return 0; |
3602 | } | |
3603 | ||
ff8b7eb8 | 3604 | memcpy(&mac, RTA_DATA(tb[NDA_LLADDR]), ETH_ALEN); |
d62a17ae | 3605 | |
2be18df4 | 3606 | if (tb[NDA_VLAN]) { |
d62a17ae | 3607 | vid_present = 1; |
d7c0a89a | 3608 | vid = *(uint16_t *)RTA_DATA(tb[NDA_VLAN]); |
772270f3 | 3609 | snprintf(vid_buf, sizeof(vid_buf), " VLAN %u", vid); |
d62a17ae | 3610 | } |
3611 | ||
3612 | if (tb[NDA_DST]) { | |
3613 | /* TODO: Only IPv4 supported now. */ | |
3614 | dst_present = 1; | |
4b3f26f4 | 3615 | memcpy(&vtep_ip.s_addr, RTA_DATA(tb[NDA_DST]), |
d62a17ae | 3616 | IPV4_MAX_BYTELEN); |
9bcef951 MS |
3617 | snprintfrr(dst_buf, sizeof(dst_buf), " dst %pI4", |
3618 | &vtep_ip); | |
e8a392d9 SR |
3619 | } else |
3620 | memset(&vtep_ip, 0, sizeof(vtep_ip)); | |
d62a17ae | 3621 | |
f188e68e AK |
3622 | if (tb[NDA_NH_ID]) |
3623 | nhg_id = *(uint32_t *)RTA_DATA(tb[NDA_NH_ID]); | |
3624 | ||
3625 | if (ndm->ndm_state & NUD_STALE) | |
3626 | local_inactive = true; | |
3627 | ||
4bcdb608 NA |
3628 | if (tb[NDA_FDB_EXT_ATTRS]) { |
3629 | struct rtattr *attr = tb[NDA_FDB_EXT_ATTRS]; | |
3630 | struct rtattr *nfea_tb[NFEA_MAX + 1] = {0}; | |
3631 | ||
3632 | netlink_parse_rtattr_nested(nfea_tb, NFEA_MAX, attr); | |
3633 | if (nfea_tb[NFEA_ACTIVITY_NOTIFY]) { | |
3634 | uint8_t nfy_flags; | |
f188e68e | 3635 | |
4bcdb608 NA |
3636 | nfy_flags = *(uint8_t *)RTA_DATA( |
3637 | nfea_tb[NFEA_ACTIVITY_NOTIFY]); | |
3638 | if (nfy_flags & FDB_NOTIFY_BIT) | |
3639 | dp_static = true; | |
3640 | if (nfy_flags & FDB_NOTIFY_INACTIVE_BIT) | |
3641 | local_inactive = true; | |
3642 | } | |
f188e68e AK |
3643 | } |
3644 | ||
784d88aa SR |
3645 | if (tb[NDA_SRC_VNI]) |
3646 | vni = *(vni_t *)RTA_DATA(tb[NDA_SRC_VNI]); | |
3647 | ||
d62a17ae | 3648 | if (IS_ZEBRA_DEBUG_KERNEL) |
784d88aa SR |
3649 | zlog_debug( |
3650 | "Rx %s AF_BRIDGE IF %u%s st 0x%x fl 0x%x MAC %pEA%s nhg %d vni %d", | |
3651 | nl_msg_type_to_str(h->nlmsg_type), ndm->ndm_ifindex, | |
3652 | vid_present ? vid_buf : "", ndm->ndm_state, | |
3653 | ndm->ndm_flags, &mac, dst_present ? dst_buf : "", | |
3654 | nhg_id, vni); | |
d62a17ae | 3655 | |
4b3f26f4 | 3656 | /* The interface should exist. */ |
3657 | ifp = if_lookup_by_index_per_ns(zebra_ns_lookup(ns_id), | |
3658 | ndm->ndm_ifindex); | |
3659 | if (!ifp || !ifp->info) | |
3660 | return 0; | |
3661 | ||
3662 | /* The interface should be something we're interested in. */ | |
3663 | if (!IS_ZEBRA_IF_BRIDGE_SLAVE(ifp)) | |
3664 | return 0; | |
3665 | ||
3666 | zif = (struct zebra_if *)ifp->info; | |
3667 | if ((br_if = zif->brslave_info.br_if) == NULL) { | |
3668 | if (IS_ZEBRA_DEBUG_KERNEL) | |
3669 | zlog_debug( | |
3670 | "%s AF_BRIDGE IF %s(%u) brIF %u - no bridge master", | |
3671 | nl_msg_type_to_str(h->nlmsg_type), ifp->name, | |
3672 | ndm->ndm_ifindex, | |
3673 | zif->brslave_info.bridge_ifindex); | |
3674 | return 0; | |
3675 | } | |
3676 | ||
784d88aa SR |
3677 | /* For per vni device, vni comes from device itself */ |
3678 | if (IS_ZEBRA_IF_VXLAN(ifp) && IS_ZEBRA_VXLAN_IF_VNI(zif)) { | |
3679 | struct zebra_vxlan_vni *vnip; | |
9464e5b8 | 3680 | |
784d88aa SR |
3681 | vnip = zebra_vxlan_if_vni_find(zif, 0); |
3682 | vni = vnip->vni; | |
3683 | } | |
3684 | ||
f188e68e | 3685 | sticky = !!(ndm->ndm_flags & NTF_STICKY); |
4b3f26f4 | 3686 | |
28bd0652 DS |
3687 | if (filter_vlan && vid != filter_vlan) { |
3688 | if (IS_ZEBRA_DEBUG_KERNEL) | |
d6951e5e | 3689 | zlog_debug(" Filtered due to filter vlan: %d", |
28bd0652 | 3690 | filter_vlan); |
d62a17ae | 3691 | return 0; |
28bd0652 | 3692 | } |
d62a17ae | 3693 | |
784d88aa SR |
3694 | /* |
3695 | * Check if this is a mcast group update (svd case) | |
3696 | */ | |
3697 | vni_mcast_grp = is_mac_vni_mcast_group(&mac, vni, vtep_ip); | |
3698 | ||
d62a17ae | 3699 | /* If add or update, do accordingly if learnt on a "local" interface; if |
3700 | * the notification is over VxLAN, this has to be related to | |
3701 | * multi-homing, | |
3702 | * so perform an implicit delete of any local entry (if it exists). | |
3703 | */ | |
3704 | if (h->nlmsg_type == RTM_NEWNEIGH) { | |
4b3f26f4 | 3705 | /* Drop "permanent" entries. */ |
784d88aa | 3706 | if (!vni_mcast_grp && (ndm->ndm_state & NUD_PERMANENT)) { |
4b3f26f4 | 3707 | if (IS_ZEBRA_DEBUG_KERNEL) |
d6951e5e DL |
3708 | zlog_debug( |
3709 | " Dropping entry because of NUD_PERMANENT"); | |
3710 | return 0; | |
4b3f26f4 | 3711 | } |
3712 | ||
784d88aa SR |
3713 | if (IS_ZEBRA_IF_VXLAN(ifp)) { |
3714 | if (!dst_present) | |
3715 | return 0; | |
3716 | ||
3717 | if (vni_mcast_grp) | |
131a9a2e SR |
3718 | return zebra_vxlan_if_vni_mcast_group_update( |
3719 | ifp, vni, &vtep_ip); | |
784d88aa | 3720 | |
131a9a2e SR |
3721 | return zebra_vxlan_dp_network_mac_add( |
3722 | ifp, br_if, &mac, vid, vni, nhg_id, sticky, | |
3723 | !!(ndm->ndm_flags & NTF_EXT_LEARNED)); | |
784d88aa | 3724 | } |
d62a17ae | 3725 | |
3726 | return zebra_vxlan_local_mac_add_update(ifp, br_if, &mac, vid, | |
f188e68e | 3727 | sticky, local_inactive, dp_static); |
d62a17ae | 3728 | } |
3729 | ||
3730 | /* This is a delete notification. | |
4b3f26f4 | 3731 | * Ignore the notification with IP dest as it may just signify that the |
3732 | * MAC has moved from remote to local. The exception is the special | |
3733 | * all-zeros MAC that represents the BUM flooding entry; we may have | |
3734 | * to readd it. Otherwise, | |
d62a17ae | 3735 | * 1. For a MAC over VxLan, check if it needs to be refreshed(readded) |
3736 | * 2. For a MAC over "local" interface, delete the mac | |
3737 | * Note: We will get notifications from both bridge driver and VxLAN | |
3738 | * driver. | |
d62a17ae | 3739 | */ |
f188e68e AK |
3740 | if (nhg_id) |
3741 | return 0; | |
3742 | ||
28bd0652 | 3743 | if (dst_present) { |
784d88aa | 3744 | if (vni_mcast_grp) |
131a9a2e SR |
3745 | return zebra_vxlan_if_vni_mcast_group_update(ifp, vni, |
3746 | NULL); | |
784d88aa | 3747 | |
131a9a2e SR |
3748 | if (is_zero_mac(&mac)) |
3749 | return zebra_vxlan_check_readd_vtep(ifp, vni, vtep_ip); | |
4b3f26f4 | 3750 | |
d62a17ae | 3751 | return 0; |
28bd0652 | 3752 | } |
d62a17ae | 3753 | |
3754 | if (IS_ZEBRA_IF_VXLAN(ifp)) | |
784d88aa | 3755 | return 0; |
d62a17ae | 3756 | |
3757 | return zebra_vxlan_local_mac_del(ifp, br_if, &mac, vid); | |
2232a77c | 3758 | } |
3759 | ||
2414abd3 | 3760 | static int netlink_macfdb_table(struct nlmsghdr *h, ns_id_t ns_id, int startup) |
2232a77c | 3761 | { |
d62a17ae | 3762 | int len; |
3763 | struct ndmsg *ndm; | |
2232a77c | 3764 | |
d62a17ae | 3765 | if (h->nlmsg_type != RTM_NEWNEIGH) |
3766 | return 0; | |
2232a77c | 3767 | |
d62a17ae | 3768 | /* Length validity. */ |
3769 | len = h->nlmsg_len - NLMSG_LENGTH(sizeof(struct ndmsg)); | |
3770 | if (len < 0) | |
3771 | return -1; | |
2232a77c | 3772 | |
d62a17ae | 3773 | /* We are interested only in AF_BRIDGE notifications. */ |
3774 | ndm = NLMSG_DATA(h); | |
3775 | if (ndm->ndm_family != AF_BRIDGE) | |
3776 | return 0; | |
2232a77c | 3777 | |
2414abd3 | 3778 | return netlink_macfdb_change(h, len, ns_id); |
2232a77c | 3779 | } |
3780 | ||
3781 | /* Request for MAC FDB information from the kernel */ | |
85a75f1e MS |
3782 | static int netlink_request_macs(struct nlsock *netlink_cmd, int family, |
3783 | int type, ifindex_t master_ifindex) | |
2232a77c | 3784 | { |
d62a17ae | 3785 | struct { |
3786 | struct nlmsghdr n; | |
3787 | struct ifinfomsg ifm; | |
3788 | char buf[256]; | |
3789 | } req; | |
3790 | ||
3791 | /* Form the request, specifying filter (rtattr) if needed. */ | |
3792 | memset(&req, 0, sizeof(req)); | |
3793 | req.n.nlmsg_type = type; | |
718f9b0f | 3794 | req.n.nlmsg_flags = NLM_F_ROOT | NLM_F_MATCH | NLM_F_REQUEST; |
d62a17ae | 3795 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg)); |
3796 | req.ifm.ifi_family = family; | |
3797 | if (master_ifindex) | |
312a6bee | 3798 | nl_attr_put32(&req.n, sizeof(req), IFLA_MASTER, master_ifindex); |
d62a17ae | 3799 | |
fd3f8e52 | 3800 | return netlink_request(netlink_cmd, &req); |
2232a77c | 3801 | } |
3802 | ||
3803 | /* | |
3804 | * MAC forwarding database read using netlink interface. This is invoked | |
3805 | * at startup. | |
3806 | */ | |
d62a17ae | 3807 | int netlink_macfdb_read(struct zebra_ns *zns) |
2232a77c | 3808 | { |
d62a17ae | 3809 | int ret; |
85a75f1e MS |
3810 | struct zebra_dplane_info dp_info; |
3811 | ||
3812 | zebra_dplane_info_from_zns(&dp_info, zns, true /*is_cmd*/); | |
d62a17ae | 3813 | |
3814 | /* Get bridge FDB table. */ | |
85a75f1e MS |
3815 | ret = netlink_request_macs(&zns->netlink_cmd, AF_BRIDGE, RTM_GETNEIGH, |
3816 | 0); | |
d62a17ae | 3817 | if (ret < 0) |
3818 | return ret; | |
3819 | /* We are reading entire table. */ | |
3820 | filter_vlan = 0; | |
85a75f1e | 3821 | ret = netlink_parse_info(netlink_macfdb_table, &zns->netlink_cmd, |
9bfadae8 | 3822 | &dp_info, 0, true); |
d62a17ae | 3823 | |
3824 | return ret; | |
2232a77c | 3825 | } |
3826 | ||
3827 | /* | |
3828 | * MAC forwarding database read using netlink interface. This is for a | |
3829 | * specific bridge and matching specific access VLAN (if VLAN-aware bridge). | |
3830 | */ | |
d62a17ae | 3831 | int netlink_macfdb_read_for_bridge(struct zebra_ns *zns, struct interface *ifp, |
784d88aa | 3832 | struct interface *br_if, vlanid_t vid) |
2232a77c | 3833 | { |
d62a17ae | 3834 | struct zebra_if *br_zif; |
85a75f1e | 3835 | struct zebra_dplane_info dp_info; |
d62a17ae | 3836 | int ret = 0; |
3837 | ||
85a75f1e | 3838 | zebra_dplane_info_from_zns(&dp_info, zns, true /*is_cmd*/); |
d62a17ae | 3839 | |
3840 | /* Save VLAN we're filtering on, if needed. */ | |
3841 | br_zif = (struct zebra_if *)br_if->info; | |
d62a17ae | 3842 | if (IS_ZEBRA_IF_BRIDGE_VLAN_AWARE(br_zif)) |
784d88aa | 3843 | filter_vlan = vid; |
d62a17ae | 3844 | |
3845 | /* Get bridge FDB table for specific bridge - we do the VLAN filtering. | |
3846 | */ | |
85a75f1e | 3847 | ret = netlink_request_macs(&zns->netlink_cmd, AF_BRIDGE, RTM_GETNEIGH, |
d62a17ae | 3848 | br_if->ifindex); |
3849 | if (ret < 0) | |
3850 | return ret; | |
85a75f1e | 3851 | ret = netlink_parse_info(netlink_macfdb_table, &zns->netlink_cmd, |
9bfadae8 | 3852 | &dp_info, 0, false); |
d62a17ae | 3853 | |
3854 | /* Reset VLAN filter. */ | |
3855 | filter_vlan = 0; | |
3856 | return ret; | |
2232a77c | 3857 | } |
3858 | ||
67fb9374 CS |
3859 | |
3860 | /* Request for MAC FDB for a specific MAC address in VLAN from the kernel */ | |
9464e5b8 SR |
3861 | static int netlink_request_specific_mac(struct zebra_ns *zns, int family, |
3862 | int type, struct interface *ifp, | |
3863 | const struct ethaddr *mac, vlanid_t vid, | |
3864 | vni_t vni, uint8_t flags) | |
67fb9374 CS |
3865 | { |
3866 | struct { | |
3867 | struct nlmsghdr n; | |
3868 | struct ndmsg ndm; | |
3869 | char buf[256]; | |
3870 | } req; | |
9464e5b8 | 3871 | struct zebra_if *zif; |
67fb9374 CS |
3872 | |
3873 | memset(&req, 0, sizeof(req)); | |
3874 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)); | |
3875 | req.n.nlmsg_type = type; /* RTM_GETNEIGH */ | |
3876 | req.n.nlmsg_flags = NLM_F_REQUEST; | |
3877 | req.ndm.ndm_family = family; /* AF_BRIDGE */ | |
9464e5b8 | 3878 | req.ndm.ndm_flags = flags; |
67fb9374 CS |
3879 | /* req.ndm.ndm_state = NUD_REACHABLE; */ |
3880 | ||
312a6bee | 3881 | nl_attr_put(&req.n, sizeof(req), NDA_LLADDR, mac, 6); |
67fb9374 | 3882 | |
9464e5b8 SR |
3883 | zif = (struct zebra_if *)ifp->info; |
3884 | /* Is this a read on a VXLAN interface? */ | |
3885 | if (IS_ZEBRA_IF_VXLAN(ifp)) { | |
3886 | nl_attr_put32(&req.n, sizeof(req), NDA_VNI, vni); | |
3887 | /* TBD: Why is ifindex not filled in the non-vxlan case? */ | |
3888 | req.ndm.ndm_ifindex = ifp->ifindex; | |
3889 | } else { | |
3890 | if (IS_ZEBRA_IF_BRIDGE_VLAN_AWARE(zif) && vid > 0) | |
3891 | nl_attr_put16(&req.n, sizeof(req), NDA_VLAN, vid); | |
3892 | nl_attr_put32(&req.n, sizeof(req), NDA_MASTER, ifp->ifindex); | |
3893 | } | |
67fb9374 CS |
3894 | |
3895 | if (IS_ZEBRA_DEBUG_KERNEL) | |
9464e5b8 SR |
3896 | zlog_debug("Tx %s %s IF %s(%u) MAC %pEA vid %u vni %u", |
3897 | nl_msg_type_to_str(type), | |
3898 | nl_family_to_str(req.ndm.ndm_family), ifp->name, | |
3899 | ifp->ifindex, mac, vid, vni); | |
67fb9374 | 3900 | |
fd3f8e52 | 3901 | return netlink_request(&zns->netlink_cmd, &req); |
67fb9374 CS |
3902 | } |
3903 | ||
3904 | int netlink_macfdb_read_specific_mac(struct zebra_ns *zns, | |
3905 | struct interface *br_if, | |
1a3bd37f | 3906 | const struct ethaddr *mac, vlanid_t vid) |
67fb9374 CS |
3907 | { |
3908 | int ret = 0; | |
3909 | struct zebra_dplane_info dp_info; | |
3910 | ||
3911 | zebra_dplane_info_from_zns(&dp_info, zns, true /*is_cmd*/); | |
3912 | ||
3913 | /* Get bridge FDB table for specific bridge - we do the VLAN filtering. | |
3914 | */ | |
9464e5b8 SR |
3915 | ret = netlink_request_specific_mac(zns, AF_BRIDGE, RTM_GETNEIGH, br_if, |
3916 | mac, vid, 0, 0); | |
3917 | if (ret < 0) | |
3918 | return ret; | |
3919 | ||
3920 | ret = netlink_parse_info(netlink_macfdb_table, &zns->netlink_cmd, | |
3921 | &dp_info, 1, 0); | |
3922 | ||
3923 | return ret; | |
3924 | } | |
3925 | ||
3926 | int netlink_macfdb_read_mcast_for_vni(struct zebra_ns *zns, | |
3927 | struct interface *ifp, vni_t vni) | |
3928 | { | |
3929 | struct zebra_if *zif; | |
3930 | struct ethaddr mac = { .octet = {0} }; | |
3931 | struct zebra_dplane_info dp_info; | |
3932 | int ret = 0; | |
3933 | ||
3934 | zif = ifp->info; | |
3935 | if (IS_ZEBRA_VXLAN_IF_VNI(zif)) | |
3936 | return 0; | |
3937 | ||
3938 | zebra_dplane_info_from_zns(&dp_info, zns, true /*is_cmd*/); | |
3939 | ||
3940 | /* Get specific FDB entry for BUM handling, if any */ | |
3941 | ret = netlink_request_specific_mac(zns, AF_BRIDGE, RTM_GETNEIGH, ifp, | |
3942 | &mac, 0, vni, NTF_SELF); | |
67fb9374 CS |
3943 | if (ret < 0) |
3944 | return ret; | |
3945 | ||
3946 | ret = netlink_parse_info(netlink_macfdb_table, &zns->netlink_cmd, | |
9bfadae8 | 3947 | &dp_info, 1, false); |
67fb9374 CS |
3948 | |
3949 | return ret; | |
3950 | } | |
036d93c0 MS |
3951 | |
3952 | /* | |
3953 | * Netlink-specific handler for MAC updates using dataplane context object. | |
3954 | */ | |
67e3369e JU |
3955 | ssize_t netlink_macfdb_update_ctx(struct zebra_dplane_ctx *ctx, void *data, |
3956 | size_t datalen) | |
2232a77c | 3957 | { |
340845e2 | 3958 | struct ipaddr vtep_ip; |
036d93c0 | 3959 | vlanid_t vid; |
d4d4ec1c RZ |
3960 | ssize_t total; |
3961 | int cmd; | |
340845e2 JU |
3962 | uint8_t flags; |
3963 | uint16_t state; | |
506efd37 | 3964 | uint32_t nhg_id; |
f188e68e AK |
3965 | uint32_t update_flags; |
3966 | bool nfy = false; | |
3967 | uint8_t nfy_flags = 0; | |
88217099 PG |
3968 | int proto = RTPROT_ZEBRA; |
3969 | ||
3970 | if (dplane_ctx_get_type(ctx) != 0) | |
3971 | proto = zebra2proto(dplane_ctx_get_type(ctx)); | |
d4d4ec1c RZ |
3972 | |
3973 | cmd = dplane_ctx_get_op(ctx) == DPLANE_OP_MAC_INSTALL | |
3974 | ? RTM_NEWNEIGH : RTM_DELNEIGH; | |
036d93c0 | 3975 | |
f188e68e | 3976 | flags = NTF_MASTER; |
340845e2 | 3977 | state = NUD_REACHABLE; |
d62a17ae | 3978 | |
f188e68e AK |
3979 | update_flags = dplane_ctx_mac_get_update_flags(ctx); |
3980 | if (update_flags & DPLANE_MAC_REMOTE) { | |
3981 | flags |= NTF_SELF; | |
60e372e9 AK |
3982 | if (dplane_ctx_mac_is_sticky(ctx)) { |
3983 | /* NUD_NOARP prevents the entry from expiring */ | |
3984 | state |= NUD_NOARP; | |
3985 | /* sticky the entry from moving */ | |
f188e68e | 3986 | flags |= NTF_STICKY; |
60e372e9 | 3987 | } else { |
f188e68e | 3988 | flags |= NTF_EXT_LEARNED; |
60e372e9 | 3989 | } |
f188e68e AK |
3990 | /* if it was static-local previously we need to clear the |
3991 | * notify flags on replace with remote | |
3992 | */ | |
3993 | if (update_flags & DPLANE_MAC_WAS_STATIC) | |
3994 | nfy = true; | |
3995 | } else { | |
3996 | /* local mac */ | |
3997 | if (update_flags & DPLANE_MAC_SET_STATIC) { | |
4bcdb608 | 3998 | nfy_flags |= FDB_NOTIFY_BIT; |
f188e68e AK |
3999 | state |= NUD_NOARP; |
4000 | } | |
4001 | ||
4002 | if (update_flags & DPLANE_MAC_SET_INACTIVE) | |
4bcdb608 | 4003 | nfy_flags |= FDB_NOTIFY_INACTIVE_BIT; |
f188e68e AK |
4004 | |
4005 | nfy = true; | |
4006 | } | |
478566d6 | 4007 | |
506efd37 | 4008 | nhg_id = dplane_ctx_mac_get_nhg_id(ctx); |
340845e2 JU |
4009 | vtep_ip.ipaddr_v4 = *(dplane_ctx_mac_get_vtep_ip(ctx)); |
4010 | SET_IPADDR_V4(&vtep_ip); | |
d62a17ae | 4011 | |
036d93c0 | 4012 | if (IS_ZEBRA_DEBUG_KERNEL) { |
478566d6 | 4013 | char vid_buf[20]; |
506efd37 | 4014 | const struct ethaddr *mac = dplane_ctx_mac_get_addr(ctx); |
478566d6 | 4015 | |
340845e2 JU |
4016 | vid = dplane_ctx_mac_get_vlan(ctx); |
4017 | if (vid > 0) | |
478566d6 MS |
4018 | snprintf(vid_buf, sizeof(vid_buf), " VLAN %u", vid); |
4019 | else | |
4020 | vid_buf[0] = '\0'; | |
036d93c0 | 4021 | |
ccd187cd | 4022 | zlog_debug( |
ef7b8be4 | 4023 | "Tx %s family %s IF %s(%u)%s %sMAC %pEA dst %pIA nhg %u%s%s%s%s%s", |
ccd187cd AK |
4024 | nl_msg_type_to_str(cmd), nl_family_to_str(AF_BRIDGE), |
4025 | dplane_ctx_get_ifname(ctx), dplane_ctx_get_ifindex(ctx), | |
4026 | vid_buf, dplane_ctx_mac_is_sticky(ctx) ? "sticky " : "", | |
ef7b8be4 | 4027 | mac, &vtep_ip, nhg_id, |
ccd187cd AK |
4028 | (update_flags & DPLANE_MAC_REMOTE) ? " rem" : "", |
4029 | (update_flags & DPLANE_MAC_WAS_STATIC) ? " clr_sync" | |
4030 | : "", | |
4031 | (update_flags & DPLANE_MAC_SET_STATIC) ? " static" : "", | |
4032 | (update_flags & DPLANE_MAC_SET_INACTIVE) ? " inactive" | |
4033 | : "", | |
4034 | nfy ? " nfy" : ""); | |
036d93c0 | 4035 | } |
d62a17ae | 4036 | |
0be6e7d7 | 4037 | total = netlink_neigh_update_msg_encode( |
0a27a2fe PG |
4038 | ctx, cmd, (const void *)dplane_ctx_mac_get_addr(ctx), ETH_ALEN, |
4039 | &vtep_ip, true, AF_BRIDGE, 0, flags, state, nhg_id, nfy, | |
4040 | nfy_flags, false /*ext*/, 0 /*ext_flags*/, data, datalen, | |
88217099 | 4041 | proto); |
d4d4ec1c RZ |
4042 | |
4043 | return total; | |
2232a77c | 4044 | } |
4045 | ||
f17b99ed DS |
4046 | /* |
4047 | * In the event the kernel deletes ipv4 link-local neighbor entries created for | |
4048 | * 5549 support, re-install them. | |
4049 | */ | |
4050 | static void netlink_handle_5549(struct ndmsg *ndm, struct zebra_if *zif, | |
9b036974 DS |
4051 | struct interface *ifp, struct ipaddr *ip, |
4052 | bool handle_failed) | |
f17b99ed DS |
4053 | { |
4054 | if (ndm->ndm_family != AF_INET) | |
4055 | return; | |
4056 | ||
4057 | if (!zif->v6_2_v4_ll_neigh_entry) | |
4058 | return; | |
4059 | ||
4060 | if (ipv4_ll.s_addr != ip->ip._v4_addr.s_addr) | |
4061 | return; | |
4062 | ||
9b036974 DS |
4063 | if (handle_failed && ndm->ndm_state & NUD_FAILED) { |
4064 | zlog_info("Neighbor Entry for %s has entered a failed state, not reinstalling", | |
4065 | ifp->name); | |
4066 | return; | |
4067 | } | |
4068 | ||
f17b99ed DS |
4069 | if_nbr_ipv6ll_to_ipv4ll_neigh_update(ifp, &zif->v6_2_v4_ll_addr6, true); |
4070 | } | |
4071 | ||
d62a17ae | 4072 | #define NUD_VALID \ |
4073 | (NUD_PERMANENT | NUD_NOARP | NUD_REACHABLE | NUD_PROBE | NUD_STALE \ | |
4074 | | NUD_DELAY) | |
f188e68e AK |
4075 | #define NUD_LOCAL_ACTIVE \ |
4076 | (NUD_PERMANENT | NUD_NOARP | NUD_REACHABLE) | |
2232a77c | 4077 | |
80f6b5fa PG |
4078 | static int netlink_nbr_entry_state_to_zclient(int nbr_state) |
4079 | { | |
4080 | /* an exact match is done between | |
4081 | * - netlink neighbor state values: NDM_XXX (see in linux/neighbour.h) | |
4082 | * - zclient neighbor state values: ZEBRA_NEIGH_STATE_XXX | |
4083 | * (see in lib/zclient.h) | |
4084 | */ | |
4085 | return nbr_state; | |
4086 | } | |
2414abd3 | 4087 | static int netlink_ipneigh_change(struct nlmsghdr *h, int len, ns_id_t ns_id) |
2232a77c | 4088 | { |
d62a17ae | 4089 | struct ndmsg *ndm; |
4090 | struct interface *ifp; | |
4091 | struct zebra_if *zif; | |
d62a17ae | 4092 | struct rtattr *tb[NDA_MAX + 1]; |
4093 | struct interface *link_if; | |
4094 | struct ethaddr mac; | |
4095 | struct ipaddr ip; | |
4096 | char buf[ETHER_ADDR_STRLEN]; | |
d62a17ae | 4097 | int mac_present = 0; |
a37f4598 | 4098 | bool is_ext; |
4099 | bool is_router; | |
f188e68e | 4100 | bool local_inactive; |
7c0e4dc6 AK |
4101 | uint32_t ext_flags = 0; |
4102 | bool dp_static = false; | |
7723e8d3 PG |
4103 | int l2_len = 0; |
4104 | int cmd; | |
d62a17ae | 4105 | |
4106 | ndm = NLMSG_DATA(h); | |
4107 | ||
4108 | /* The interface should exist. */ | |
5895d33f | 4109 | ifp = if_lookup_by_index_per_ns(zebra_ns_lookup(ns_id), |
d62a17ae | 4110 | ndm->ndm_ifindex); |
2853fed6 | 4111 | if (!ifp || !ifp->info) |
d62a17ae | 4112 | return 0; |
4113 | ||
20089ae2 DS |
4114 | zif = (struct zebra_if *)ifp->info; |
4115 | ||
4116 | /* Parse attributes and extract fields of interest. */ | |
20089ae2 DS |
4117 | netlink_parse_rtattr(tb, NDA_MAX, NDA_RTA(ndm), len); |
4118 | ||
4119 | if (!tb[NDA_DST]) { | |
bd47f3a3 | 4120 | zlog_debug("%s family %s IF %s(%u) vrf %s(%u) - no DST", |
9df414fe QY |
4121 | nl_msg_type_to_str(h->nlmsg_type), |
4122 | nl_family_to_str(ndm->ndm_family), ifp->name, | |
096f7609 | 4123 | ndm->ndm_ifindex, ifp->vrf->name, ifp->vrf->vrf_id); |
d62a17ae | 4124 | return 0; |
20089ae2 DS |
4125 | } |
4126 | ||
6006b807 | 4127 | memset(&ip, 0, sizeof(ip)); |
20089ae2 DS |
4128 | ip.ipa_type = (ndm->ndm_family == AF_INET) ? IPADDR_V4 : IPADDR_V6; |
4129 | memcpy(&ip.ip.addr, RTA_DATA(tb[NDA_DST]), RTA_PAYLOAD(tb[NDA_DST])); | |
4130 | ||
f17b99ed DS |
4131 | /* if kernel deletes our rfc5549 neighbor entry, re-install it */ |
4132 | if (h->nlmsg_type == RTM_DELNEIGH && (ndm->ndm_state & NUD_PERMANENT)) { | |
9b036974 | 4133 | netlink_handle_5549(ndm, zif, ifp, &ip, false); |
28bd0652 DS |
4134 | if (IS_ZEBRA_DEBUG_KERNEL) |
4135 | zlog_debug( | |
1d5453d6 | 4136 | " Neighbor Entry Received is a 5549 entry, finished"); |
20089ae2 DS |
4137 | return 0; |
4138 | } | |
d62a17ae | 4139 | |
f17b99ed | 4140 | /* if kernel marks our rfc5549 neighbor entry invalid, re-install it */ |
9b036974 DS |
4141 | if (h->nlmsg_type == RTM_NEWNEIGH && !(ndm->ndm_state & NUD_VALID)) |
4142 | netlink_handle_5549(ndm, zif, ifp, &ip, true); | |
f17b99ed | 4143 | |
7723e8d3 PG |
4144 | /* we send link layer information to client: |
4145 | * - nlmsg_type = RTM_DELNEIGH|NEWNEIGH|GETNEIGH | |
4146 | * - struct ipaddr ( for DEL and GET) | |
4147 | * - struct ethaddr mac; (for NEW) | |
4148 | */ | |
4149 | if (h->nlmsg_type == RTM_NEWNEIGH) | |
4150 | cmd = ZEBRA_NHRP_NEIGH_ADDED; | |
4151 | else if (h->nlmsg_type == RTM_GETNEIGH) | |
4152 | cmd = ZEBRA_NHRP_NEIGH_GET; | |
4153 | else if (h->nlmsg_type == RTM_DELNEIGH) | |
4154 | cmd = ZEBRA_NHRP_NEIGH_REMOVED; | |
4155 | else { | |
4156 | zlog_debug("%s(): unknown nlmsg type %u", __func__, | |
4157 | h->nlmsg_type); | |
4158 | return 0; | |
4159 | } | |
4160 | if (tb[NDA_LLADDR]) { | |
4161 | /* copy LLADDR information */ | |
4162 | l2_len = RTA_PAYLOAD(tb[NDA_LLADDR]); | |
7723e8d3 | 4163 | } |
d603c077 PG |
4164 | if (l2_len == IPV4_MAX_BYTELEN || l2_len == 0) { |
4165 | union sockunion link_layer_ipv4; | |
4166 | ||
4167 | if (l2_len) { | |
4168 | sockunion_family(&link_layer_ipv4) = AF_INET; | |
4169 | memcpy((void *)sockunion_get_addr(&link_layer_ipv4), | |
b7c21fad | 4170 | RTA_DATA(tb[NDA_LLADDR]), l2_len); |
d603c077 PG |
4171 | } else |
4172 | sockunion_family(&link_layer_ipv4) = AF_UNSPEC; | |
80f6b5fa PG |
4173 | zsend_nhrp_neighbor_notify( |
4174 | cmd, ifp, &ip, | |
4175 | netlink_nbr_entry_state_to_zclient(ndm->ndm_state), | |
4176 | &link_layer_ipv4); | |
d603c077 | 4177 | } |
7723e8d3 PG |
4178 | |
4179 | if (h->nlmsg_type == RTM_GETNEIGH) | |
4180 | return 0; | |
4181 | ||
d62a17ae | 4182 | /* The neighbor is present on an SVI. From this, we locate the |
4183 | * underlying | |
4184 | * bridge because we're only interested in neighbors on a VxLAN bridge. | |
4185 | * The bridge is located based on the nature of the SVI: | |
4186 | * (a) In the case of a VLAN-aware bridge, the SVI is a L3 VLAN | |
4187 | * interface | |
4188 | * and is linked to the bridge | |
4189 | * (b) In the case of a VLAN-unaware bridge, the SVI is the bridge | |
3819e4ce | 4190 | * interface |
d62a17ae | 4191 | * itself |
4192 | */ | |
4193 | if (IS_ZEBRA_IF_VLAN(ifp)) { | |
5895d33f | 4194 | link_if = if_lookup_by_index_per_ns(zebra_ns_lookup(ns_id), |
71349e03 | 4195 | zif->link_ifindex); |
d62a17ae | 4196 | if (!link_if) |
4197 | return 0; | |
4198 | } else if (IS_ZEBRA_IF_BRIDGE(ifp)) | |
4199 | link_if = ifp; | |
28bd0652 | 4200 | else { |
4cf4fad1 | 4201 | link_if = NULL; |
28bd0652 DS |
4202 | if (IS_ZEBRA_DEBUG_KERNEL) |
4203 | zlog_debug( | |
1d5453d6 | 4204 | " Neighbor Entry received is not on a VLAN or a BRIDGE, ignoring"); |
28bd0652 | 4205 | } |
d62a17ae | 4206 | |
6006b807 | 4207 | memset(&mac, 0, sizeof(mac)); |
d62a17ae | 4208 | if (h->nlmsg_type == RTM_NEWNEIGH) { |
4209 | if (tb[NDA_LLADDR]) { | |
ff8b7eb8 | 4210 | if (RTA_PAYLOAD(tb[NDA_LLADDR]) != ETH_ALEN) { |
28bd0652 DS |
4211 | if (IS_ZEBRA_DEBUG_KERNEL) |
4212 | zlog_debug( | |
bd47f3a3 | 4213 | "%s family %s IF %s(%u) vrf %s(%u) - LLADDR is not MAC, len %lu", |
28bd0652 DS |
4214 | nl_msg_type_to_str( |
4215 | h->nlmsg_type), | |
4216 | nl_family_to_str( | |
4217 | ndm->ndm_family), | |
4218 | ifp->name, ndm->ndm_ifindex, | |
096f7609 IR |
4219 | ifp->vrf->name, |
4220 | ifp->vrf->vrf_id, | |
28bd0652 DS |
4221 | (unsigned long)RTA_PAYLOAD( |
4222 | tb[NDA_LLADDR])); | |
d62a17ae | 4223 | return 0; |
4224 | } | |
4225 | ||
4226 | mac_present = 1; | |
ff8b7eb8 | 4227 | memcpy(&mac, RTA_DATA(tb[NDA_LLADDR]), ETH_ALEN); |
d62a17ae | 4228 | } |
4229 | ||
a37f4598 | 4230 | is_ext = !!(ndm->ndm_flags & NTF_EXT_LEARNED); |
4231 | is_router = !!(ndm->ndm_flags & NTF_ROUTER); | |
d62a17ae | 4232 | |
7c0e4dc6 AK |
4233 | if (tb[NDA_EXT_FLAGS]) { |
4234 | ext_flags = *(uint32_t *)RTA_DATA(tb[NDA_EXT_FLAGS]); | |
4235 | if (ext_flags & NTF_E_MH_PEER_SYNC) | |
4236 | dp_static = true; | |
4237 | } | |
4238 | ||
d62a17ae | 4239 | if (IS_ZEBRA_DEBUG_KERNEL) |
4240 | zlog_debug( | |
ef7b8be4 | 4241 | "Rx %s family %s IF %s(%u) vrf %s(%u) IP %pIA MAC %s state 0x%x flags 0x%x ext_flags 0x%x", |
d62a17ae | 4242 | nl_msg_type_to_str(h->nlmsg_type), |
4243 | nl_family_to_str(ndm->ndm_family), ifp->name, | |
096f7609 IR |
4244 | ndm->ndm_ifindex, ifp->vrf->name, |
4245 | ifp->vrf->vrf_id, &ip, | |
d62a17ae | 4246 | mac_present |
4247 | ? prefix_mac2str(&mac, buf, sizeof(buf)) | |
4248 | : "", | |
7c0e4dc6 | 4249 | ndm->ndm_state, ndm->ndm_flags, ext_flags); |
d62a17ae | 4250 | |
4251 | /* If the neighbor state is valid for use, process as an add or | |
4252 | * update | |
4253 | * else process as a delete. Note that the delete handling may | |
4254 | * result | |
4255 | * in re-adding the neighbor if it is a valid "remote" neighbor. | |
4256 | */ | |
f188e68e | 4257 | if (ndm->ndm_state & NUD_VALID) { |
c7bfd085 AK |
4258 | if (zebra_evpn_mh_do_adv_reachable_neigh_only()) |
4259 | local_inactive = | |
4260 | !(ndm->ndm_state & NUD_LOCAL_ACTIVE); | |
4261 | else | |
4262 | /* If EVPN-MH is not enabled we treat STALE | |
4263 | * neighbors as locally-active and advertise | |
4264 | * them | |
4265 | */ | |
4266 | local_inactive = false; | |
f188e68e | 4267 | |
4cf4fad1 AK |
4268 | /* Add local neighbors to the l3 interface database */ |
4269 | if (is_ext) | |
4270 | zebra_neigh_del(ifp, &ip); | |
4271 | else | |
4272 | zebra_neigh_add(ifp, &ip, &mac); | |
4273 | ||
4274 | if (link_if) | |
4275 | zebra_vxlan_handle_kernel_neigh_update( | |
4276 | ifp, link_if, &ip, &mac, ndm->ndm_state, | |
4277 | is_ext, is_router, local_inactive, | |
4278 | dp_static); | |
4279 | return 0; | |
f188e68e | 4280 | } |
d62a17ae | 4281 | |
4cf4fad1 AK |
4282 | |
4283 | zebra_neigh_del(ifp, &ip); | |
4284 | if (link_if) | |
4285 | zebra_vxlan_handle_kernel_neigh_del(ifp, link_if, &ip); | |
4286 | return 0; | |
d62a17ae | 4287 | } |
4288 | ||
4289 | if (IS_ZEBRA_DEBUG_KERNEL) | |
ef7b8be4 | 4290 | zlog_debug("Rx %s family %s IF %s(%u) vrf %s(%u) IP %pIA", |
d62a17ae | 4291 | nl_msg_type_to_str(h->nlmsg_type), |
4292 | nl_family_to_str(ndm->ndm_family), ifp->name, | |
096f7609 | 4293 | ndm->ndm_ifindex, ifp->vrf->name, ifp->vrf->vrf_id, |
ef7b8be4 | 4294 | &ip); |
d62a17ae | 4295 | |
4296 | /* Process the delete - it may result in re-adding the neighbor if it is | |
4297 | * a valid "remote" neighbor. | |
4298 | */ | |
4cf4fad1 AK |
4299 | zebra_neigh_del(ifp, &ip); |
4300 | if (link_if) | |
4301 | zebra_vxlan_handle_kernel_neigh_del(ifp, link_if, &ip); | |
4302 | ||
4303 | return 0; | |
2232a77c | 4304 | } |
4305 | ||
2414abd3 | 4306 | static int netlink_neigh_table(struct nlmsghdr *h, ns_id_t ns_id, int startup) |
2232a77c | 4307 | { |
d62a17ae | 4308 | int len; |
4309 | struct ndmsg *ndm; | |
2232a77c | 4310 | |
d62a17ae | 4311 | if (h->nlmsg_type != RTM_NEWNEIGH) |
4312 | return 0; | |
2232a77c | 4313 | |
d62a17ae | 4314 | /* Length validity. */ |
4315 | len = h->nlmsg_len - NLMSG_LENGTH(sizeof(struct ndmsg)); | |
4316 | if (len < 0) | |
4317 | return -1; | |
2232a77c | 4318 | |
d62a17ae | 4319 | /* We are interested only in AF_INET or AF_INET6 notifications. */ |
4320 | ndm = NLMSG_DATA(h); | |
4321 | if (ndm->ndm_family != AF_INET && ndm->ndm_family != AF_INET6) | |
4322 | return 0; | |
2232a77c | 4323 | |
2414abd3 | 4324 | return netlink_neigh_change(h, len); |
2232a77c | 4325 | } |
4326 | ||
4327 | /* Request for IP neighbor information from the kernel */ | |
85a75f1e MS |
4328 | static int netlink_request_neigh(struct nlsock *netlink_cmd, int family, |
4329 | int type, ifindex_t ifindex) | |
2232a77c | 4330 | { |
d62a17ae | 4331 | struct { |
4332 | struct nlmsghdr n; | |
4333 | struct ndmsg ndm; | |
4334 | char buf[256]; | |
4335 | } req; | |
4336 | ||
4337 | /* Form the request, specifying filter (rtattr) if needed. */ | |
4338 | memset(&req, 0, sizeof(req)); | |
4339 | req.n.nlmsg_type = type; | |
718f9b0f | 4340 | req.n.nlmsg_flags = NLM_F_ROOT | NLM_F_MATCH | NLM_F_REQUEST; |
d62a17ae | 4341 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)); |
4342 | req.ndm.ndm_family = family; | |
4343 | if (ifindex) | |
312a6bee | 4344 | nl_attr_put32(&req.n, sizeof(req), NDA_IFINDEX, ifindex); |
d62a17ae | 4345 | |
fd3f8e52 | 4346 | return netlink_request(netlink_cmd, &req); |
2232a77c | 4347 | } |
4348 | ||
4349 | /* | |
4350 | * IP Neighbor table read using netlink interface. This is invoked | |
4351 | * at startup. | |
4352 | */ | |
d62a17ae | 4353 | int netlink_neigh_read(struct zebra_ns *zns) |
2232a77c | 4354 | { |
d62a17ae | 4355 | int ret; |
85a75f1e MS |
4356 | struct zebra_dplane_info dp_info; |
4357 | ||
4358 | zebra_dplane_info_from_zns(&dp_info, zns, true /*is_cmd*/); | |
2232a77c | 4359 | |
d62a17ae | 4360 | /* Get IP neighbor table. */ |
85a75f1e MS |
4361 | ret = netlink_request_neigh(&zns->netlink_cmd, AF_UNSPEC, RTM_GETNEIGH, |
4362 | 0); | |
d62a17ae | 4363 | if (ret < 0) |
4364 | return ret; | |
85a75f1e | 4365 | ret = netlink_parse_info(netlink_neigh_table, &zns->netlink_cmd, |
9bfadae8 | 4366 | &dp_info, 0, true); |
2232a77c | 4367 | |
d62a17ae | 4368 | return ret; |
2232a77c | 4369 | } |
4370 | ||
4371 | /* | |
4372 | * IP Neighbor table read using netlink interface. This is for a specific | |
4373 | * VLAN device. | |
4374 | */ | |
d62a17ae | 4375 | int netlink_neigh_read_for_vlan(struct zebra_ns *zns, struct interface *vlan_if) |
2232a77c | 4376 | { |
d62a17ae | 4377 | int ret = 0; |
85a75f1e MS |
4378 | struct zebra_dplane_info dp_info; |
4379 | ||
4380 | zebra_dplane_info_from_zns(&dp_info, zns, true /*is_cmd*/); | |
2232a77c | 4381 | |
85a75f1e | 4382 | ret = netlink_request_neigh(&zns->netlink_cmd, AF_UNSPEC, RTM_GETNEIGH, |
d62a17ae | 4383 | vlan_if->ifindex); |
4384 | if (ret < 0) | |
4385 | return ret; | |
85a75f1e | 4386 | ret = netlink_parse_info(netlink_neigh_table, &zns->netlink_cmd, |
9bfadae8 | 4387 | &dp_info, 0, false); |
2232a77c | 4388 | |
d62a17ae | 4389 | return ret; |
2232a77c | 4390 | } |
4391 | ||
67fb9374 CS |
4392 | /* |
4393 | * Request for a specific IP in VLAN (SVI) device from IP Neighbor table, | |
4394 | * read using netlink interface. | |
4395 | */ | |
4396 | static int netlink_request_specific_neigh_in_vlan(struct zebra_ns *zns, | |
1a3bd37f MS |
4397 | int type, |
4398 | const struct ipaddr *ip, | |
67fb9374 CS |
4399 | ifindex_t ifindex) |
4400 | { | |
4401 | struct { | |
4402 | struct nlmsghdr n; | |
4403 | struct ndmsg ndm; | |
4404 | char buf[256]; | |
4405 | } req; | |
4406 | int ipa_len; | |
4407 | ||
4408 | /* Form the request, specifying filter (rtattr) if needed. */ | |
4409 | memset(&req, 0, sizeof(req)); | |
4410 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)); | |
4411 | req.n.nlmsg_flags = NLM_F_REQUEST; | |
4412 | req.n.nlmsg_type = type; /* RTM_GETNEIGH */ | |
4413 | req.ndm.ndm_ifindex = ifindex; | |
4414 | ||
4415 | if (IS_IPADDR_V4(ip)) { | |
4416 | ipa_len = IPV4_MAX_BYTELEN; | |
4417 | req.ndm.ndm_family = AF_INET; | |
4418 | ||
4419 | } else { | |
4420 | ipa_len = IPV6_MAX_BYTELEN; | |
4421 | req.ndm.ndm_family = AF_INET6; | |
4422 | } | |
4423 | ||
312a6bee | 4424 | nl_attr_put(&req.n, sizeof(req), NDA_DST, &ip->ip.addr, ipa_len); |
67fb9374 | 4425 | |
ef7b8be4 DL |
4426 | if (IS_ZEBRA_DEBUG_KERNEL) |
4427 | zlog_debug("%s: Tx %s family %s IF %u IP %pIA flags 0x%x", | |
7c26c121 | 4428 | __func__, nl_msg_type_to_str(type), |
ef7b8be4 DL |
4429 | nl_family_to_str(req.ndm.ndm_family), ifindex, ip, |
4430 | req.n.nlmsg_flags); | |
7c26c121 | 4431 | |
fd3f8e52 | 4432 | return netlink_request(&zns->netlink_cmd, &req); |
67fb9374 CS |
4433 | } |
4434 | ||
1a3bd37f MS |
4435 | int netlink_neigh_read_specific_ip(const struct ipaddr *ip, |
4436 | struct interface *vlan_if) | |
67fb9374 CS |
4437 | { |
4438 | int ret = 0; | |
4439 | struct zebra_ns *zns; | |
096f7609 | 4440 | struct zebra_vrf *zvrf = vlan_if->vrf->info; |
67fb9374 CS |
4441 | struct zebra_dplane_info dp_info; |
4442 | ||
4443 | zns = zvrf->zns; | |
4444 | ||
4445 | zebra_dplane_info_from_zns(&dp_info, zns, true /*is_cmd*/); | |
4446 | ||
4447 | if (IS_ZEBRA_DEBUG_KERNEL) | |
ef7b8be4 DL |
4448 | zlog_debug("%s: neigh request IF %s(%u) IP %pIA vrf %s(%u)", |
4449 | __func__, vlan_if->name, vlan_if->ifindex, ip, | |
096f7609 | 4450 | vlan_if->vrf->name, vlan_if->vrf->vrf_id); |
67fb9374 CS |
4451 | |
4452 | ret = netlink_request_specific_neigh_in_vlan(zns, RTM_GETNEIGH, ip, | |
4453 | vlan_if->ifindex); | |
4454 | if (ret < 0) | |
4455 | return ret; | |
4456 | ||
4457 | ret = netlink_parse_info(netlink_neigh_table, &zns->netlink_cmd, | |
9bfadae8 | 4458 | &dp_info, 1, false); |
67fb9374 CS |
4459 | |
4460 | return ret; | |
4461 | } | |
4462 | ||
2414abd3 | 4463 | int netlink_neigh_change(struct nlmsghdr *h, ns_id_t ns_id) |
2232a77c | 4464 | { |
d62a17ae | 4465 | int len; |
4466 | struct ndmsg *ndm; | |
2232a77c | 4467 | |
7723e8d3 PG |
4468 | if (!(h->nlmsg_type == RTM_NEWNEIGH || h->nlmsg_type == RTM_DELNEIGH |
4469 | || h->nlmsg_type == RTM_GETNEIGH)) | |
d62a17ae | 4470 | return 0; |
2232a77c | 4471 | |
d62a17ae | 4472 | /* Length validity. */ |
4473 | len = h->nlmsg_len - NLMSG_LENGTH(sizeof(struct ndmsg)); | |
9bdf8618 | 4474 | if (len < 0) { |
15569c58 DA |
4475 | zlog_err( |
4476 | "%s: Message received from netlink is of a broken size %d %zu", | |
4477 | __func__, h->nlmsg_len, | |
4478 | (size_t)NLMSG_LENGTH(sizeof(struct ndmsg))); | |
d62a17ae | 4479 | return -1; |
9bdf8618 | 4480 | } |
2232a77c | 4481 | |
d62a17ae | 4482 | /* Is this a notification for the MAC FDB or IP neighbor table? */ |
4483 | ndm = NLMSG_DATA(h); | |
4484 | if (ndm->ndm_family == AF_BRIDGE) | |
2414abd3 | 4485 | return netlink_macfdb_change(h, len, ns_id); |
2232a77c | 4486 | |
d62a17ae | 4487 | if (ndm->ndm_type != RTN_UNICAST) |
4488 | return 0; | |
2232a77c | 4489 | |
d62a17ae | 4490 | if (ndm->ndm_family == AF_INET || ndm->ndm_family == AF_INET6) |
2414abd3 | 4491 | return netlink_ipneigh_change(h, len, ns_id); |
8a1b681c | 4492 | else { |
9df414fe | 4493 | flog_warn( |
e914ccbe | 4494 | EC_ZEBRA_UNKNOWN_FAMILY, |
87b5d1b0 DS |
4495 | "Invalid address family: %u received from kernel neighbor change: %s", |
4496 | ndm->ndm_family, nl_msg_type_to_str(h->nlmsg_type)); | |
8a1b681c SW |
4497 | return 0; |
4498 | } | |
2232a77c | 4499 | |
d62a17ae | 4500 | return 0; |
2232a77c | 4501 | } |
4502 | ||
931fa60c MS |
4503 | /* |
4504 | * Utility neighbor-update function, using info from dplane context. | |
4505 | */ | |
67e3369e JU |
4506 | static ssize_t netlink_neigh_update_ctx(const struct zebra_dplane_ctx *ctx, |
4507 | int cmd, void *buf, size_t buflen) | |
2232a77c | 4508 | { |
931fa60c | 4509 | const struct ipaddr *ip; |
0a27a2fe PG |
4510 | const struct ethaddr *mac = NULL; |
4511 | const struct ipaddr *link_ip = NULL; | |
4512 | const void *link_ptr = NULL; | |
4513 | char buf2[ETHER_ADDR_STRLEN]; | |
4514 | ||
4515 | int llalen; | |
931fa60c MS |
4516 | uint8_t flags; |
4517 | uint16_t state; | |
340845e2 | 4518 | uint8_t family; |
ccd187cd AK |
4519 | uint32_t update_flags; |
4520 | uint32_t ext_flags = 0; | |
4521 | bool ext = false; | |
88217099 PG |
4522 | int proto = RTPROT_ZEBRA; |
4523 | ||
4524 | if (dplane_ctx_get_type(ctx) != 0) | |
4525 | proto = zebra2proto(dplane_ctx_get_type(ctx)); | |
d62a17ae | 4526 | |
931fa60c | 4527 | ip = dplane_ctx_neigh_get_ipaddr(ctx); |
931fa60c | 4528 | |
0a27a2fe PG |
4529 | if (dplane_ctx_get_op(ctx) == DPLANE_OP_NEIGH_IP_INSTALL |
4530 | || dplane_ctx_get_op(ctx) == DPLANE_OP_NEIGH_IP_DELETE) { | |
4531 | link_ip = dplane_ctx_neigh_get_link_ip(ctx); | |
4532 | llalen = IPADDRSZ(link_ip); | |
4533 | link_ptr = (const void *)&(link_ip->ip.addr); | |
4534 | ipaddr2str(link_ip, buf2, sizeof(buf2)); | |
4535 | } else { | |
4536 | mac = dplane_ctx_neigh_get_mac(ctx); | |
4537 | llalen = ETH_ALEN; | |
4538 | link_ptr = (const void *)mac; | |
4539 | if (is_zero_mac(mac)) | |
4540 | mac = NULL; | |
4541 | if (mac) | |
4542 | prefix_mac2str(mac, buf2, sizeof(buf2)); | |
4543 | else | |
4544 | snprintf(buf2, sizeof(buf2), "null"); | |
4545 | } | |
ccd187cd | 4546 | update_flags = dplane_ctx_neigh_get_update_flags(ctx); |
931fa60c MS |
4547 | flags = neigh_flags_to_netlink(dplane_ctx_neigh_get_flags(ctx)); |
4548 | state = neigh_state_to_netlink(dplane_ctx_neigh_get_state(ctx)); | |
4549 | ||
340845e2 | 4550 | family = IS_IPADDR_V4(ip) ? AF_INET : AF_INET6; |
d62a17ae | 4551 | |
ccd187cd AK |
4552 | if (update_flags & DPLANE_NEIGH_REMOTE) { |
4553 | flags |= NTF_EXT_LEARNED; | |
4554 | /* if it was static-local previously we need to clear the | |
4555 | * ext flags on replace with remote | |
4556 | */ | |
4557 | if (update_flags & DPLANE_NEIGH_WAS_STATIC) | |
4558 | ext = true; | |
0a27a2fe | 4559 | } else if (!(update_flags & DPLANE_NEIGH_NO_EXTENSION)) { |
ccd187cd AK |
4560 | ext = true; |
4561 | /* local neigh */ | |
4562 | if (update_flags & DPLANE_NEIGH_SET_STATIC) | |
4563 | ext_flags |= NTF_E_MH_PEER_SYNC; | |
ccd187cd | 4564 | } |
ef7b8be4 | 4565 | if (IS_ZEBRA_DEBUG_KERNEL) |
340845e2 | 4566 | zlog_debug( |
0a27a2fe | 4567 | "Tx %s family %s IF %s(%u) Neigh %pIA %s %s flags 0x%x state 0x%x %sext_flags 0x%x", |
340845e2 JU |
4568 | nl_msg_type_to_str(cmd), nl_family_to_str(family), |
4569 | dplane_ctx_get_ifname(ctx), dplane_ctx_get_ifindex(ctx), | |
64a29a00 | 4570 | ip, link_ip ? "Link" : "MAC", buf2, flags, state, |
0a27a2fe | 4571 | ext ? "ext " : "", ext_flags); |
d62a17ae | 4572 | |
18f60fe9 | 4573 | return netlink_neigh_update_msg_encode( |
0a27a2fe PG |
4574 | ctx, cmd, link_ptr, llalen, ip, true, family, RTN_UNICAST, |
4575 | flags, state, 0 /*nhg*/, false /*nfy*/, 0 /*nfy_flags*/, ext, | |
88217099 | 4576 | ext_flags, buf, buflen, proto); |
2232a77c | 4577 | } |
4578 | ||
e18747a9 PG |
4579 | static int netlink_neigh_table_update_ctx(const struct zebra_dplane_ctx *ctx, |
4580 | void *data, size_t datalen) | |
4581 | { | |
4582 | struct { | |
4583 | struct nlmsghdr n; | |
4584 | struct ndtmsg ndtm; | |
4585 | char buf[]; | |
4586 | } *req = data; | |
4587 | struct rtattr *nest; | |
4588 | uint8_t family; | |
4589 | ifindex_t idx; | |
4590 | uint32_t val; | |
4591 | ||
4592 | if (datalen < sizeof(*req)) | |
4593 | return 0; | |
4594 | memset(req, 0, sizeof(*req)); | |
4595 | family = dplane_ctx_neightable_get_family(ctx); | |
4596 | idx = dplane_ctx_get_ifindex(ctx); | |
4597 | ||
4598 | req->n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndtmsg)); | |
4599 | req->n.nlmsg_flags = NLM_F_REQUEST | NLM_F_REPLACE; | |
4600 | req->n.nlmsg_type = RTM_SETNEIGHTBL; | |
4601 | req->ndtm.ndtm_family = family; | |
4602 | ||
4603 | nl_attr_put(&req->n, datalen, NDTA_NAME, | |
4604 | family == AF_INET ? "arp_cache" : "ndisc_cache", 10); | |
4605 | nest = nl_attr_nest(&req->n, datalen, NDTA_PARMS); | |
4606 | if (nest == NULL) | |
4607 | return 0; | |
4608 | if (!nl_attr_put(&req->n, datalen, NDTPA_IFINDEX, &idx, sizeof(idx))) | |
4609 | return 0; | |
4610 | val = dplane_ctx_neightable_get_app_probes(ctx); | |
4611 | if (!nl_attr_put(&req->n, datalen, NDTPA_APP_PROBES, &val, sizeof(val))) | |
4612 | return 0; | |
4613 | val = dplane_ctx_neightable_get_mcast_probes(ctx); | |
4614 | if (!nl_attr_put(&req->n, datalen, NDTPA_MCAST_PROBES, &val, | |
4615 | sizeof(val))) | |
4616 | return 0; | |
4617 | val = dplane_ctx_neightable_get_ucast_probes(ctx); | |
4618 | if (!nl_attr_put(&req->n, datalen, NDTPA_UCAST_PROBES, &val, | |
4619 | sizeof(val))) | |
4620 | return 0; | |
4621 | nl_attr_nest_end(&req->n, nest); | |
4622 | ||
4623 | return NLMSG_ALIGN(req->n.nlmsg_len); | |
4624 | } | |
4625 | ||
67e3369e JU |
4626 | static ssize_t netlink_neigh_msg_encoder(struct zebra_dplane_ctx *ctx, |
4627 | void *buf, size_t buflen) | |
2232a77c | 4628 | { |
a98701f0 | 4629 | ssize_t ret = 0; |
2232a77c | 4630 | |
931fa60c MS |
4631 | switch (dplane_ctx_get_op(ctx)) { |
4632 | case DPLANE_OP_NEIGH_INSTALL: | |
4633 | case DPLANE_OP_NEIGH_UPDATE: | |
d68e74b4 | 4634 | case DPLANE_OP_NEIGH_DISCOVER: |
0a27a2fe | 4635 | case DPLANE_OP_NEIGH_IP_INSTALL: |
67e3369e | 4636 | ret = netlink_neigh_update_ctx(ctx, RTM_NEWNEIGH, buf, buflen); |
931fa60c MS |
4637 | break; |
4638 | case DPLANE_OP_NEIGH_DELETE: | |
0a27a2fe | 4639 | case DPLANE_OP_NEIGH_IP_DELETE: |
67e3369e | 4640 | ret = netlink_neigh_update_ctx(ctx, RTM_DELNEIGH, buf, buflen); |
931fa60c | 4641 | break; |
0bbd4ff4 | 4642 | case DPLANE_OP_VTEP_ADD: |
67e3369e JU |
4643 | ret = netlink_vxlan_flood_update_ctx(ctx, RTM_NEWNEIGH, buf, |
4644 | buflen); | |
0bbd4ff4 MS |
4645 | break; |
4646 | case DPLANE_OP_VTEP_DELETE: | |
67e3369e JU |
4647 | ret = netlink_vxlan_flood_update_ctx(ctx, RTM_DELNEIGH, buf, |
4648 | buflen); | |
0bbd4ff4 | 4649 | break; |
e18747a9 PG |
4650 | case DPLANE_OP_NEIGH_TABLE_UPDATE: |
4651 | ret = netlink_neigh_table_update_ctx(ctx, buf, buflen); | |
4652 | break; | |
a98701f0 DS |
4653 | case DPLANE_OP_ROUTE_INSTALL: |
4654 | case DPLANE_OP_ROUTE_UPDATE: | |
4655 | case DPLANE_OP_ROUTE_DELETE: | |
4656 | case DPLANE_OP_ROUTE_NOTIFY: | |
4657 | case DPLANE_OP_NH_INSTALL: | |
4658 | case DPLANE_OP_NH_UPDATE: | |
4659 | case DPLANE_OP_NH_DELETE: | |
4660 | case DPLANE_OP_LSP_INSTALL: | |
4661 | case DPLANE_OP_LSP_UPDATE: | |
4662 | case DPLANE_OP_LSP_DELETE: | |
4663 | case DPLANE_OP_LSP_NOTIFY: | |
4664 | case DPLANE_OP_PW_INSTALL: | |
4665 | case DPLANE_OP_PW_UNINSTALL: | |
4666 | case DPLANE_OP_SYS_ROUTE_ADD: | |
4667 | case DPLANE_OP_SYS_ROUTE_DELETE: | |
4668 | case DPLANE_OP_ADDR_INSTALL: | |
4669 | case DPLANE_OP_ADDR_UNINSTALL: | |
4670 | case DPLANE_OP_MAC_INSTALL: | |
4671 | case DPLANE_OP_MAC_DELETE: | |
4672 | case DPLANE_OP_RULE_ADD: | |
4673 | case DPLANE_OP_RULE_DELETE: | |
4674 | case DPLANE_OP_RULE_UPDATE: | |
4675 | case DPLANE_OP_BR_PORT_UPDATE: | |
4676 | case DPLANE_OP_IPTABLE_ADD: | |
4677 | case DPLANE_OP_IPTABLE_DELETE: | |
4678 | case DPLANE_OP_IPSET_ADD: | |
4679 | case DPLANE_OP_IPSET_DELETE: | |
4680 | case DPLANE_OP_IPSET_ENTRY_ADD: | |
4681 | case DPLANE_OP_IPSET_ENTRY_DELETE: | |
4682 | case DPLANE_OP_GRE_SET: | |
4683 | case DPLANE_OP_INTF_ADDR_ADD: | |
4684 | case DPLANE_OP_INTF_ADDR_DEL: | |
4685 | case DPLANE_OP_INTF_NETCONFIG: | |
4686 | case DPLANE_OP_INTF_INSTALL: | |
4687 | case DPLANE_OP_INTF_UPDATE: | |
4688 | case DPLANE_OP_INTF_DELETE: | |
4689 | case DPLANE_OP_TC_QDISC_INSTALL: | |
4690 | case DPLANE_OP_TC_QDISC_UNINSTALL: | |
4691 | case DPLANE_OP_TC_CLASS_ADD: | |
4692 | case DPLANE_OP_TC_CLASS_DELETE: | |
4693 | case DPLANE_OP_TC_CLASS_UPDATE: | |
4694 | case DPLANE_OP_TC_FILTER_ADD: | |
4695 | case DPLANE_OP_TC_FILTER_DELETE: | |
4696 | case DPLANE_OP_TC_FILTER_UPDATE: | |
4697 | case DPLANE_OP_NONE: | |
67e3369e | 4698 | ret = -1; |
931fa60c | 4699 | } |
2232a77c | 4700 | |
67e3369e JU |
4701 | return ret; |
4702 | } | |
4703 | ||
4704 | /* | |
4705 | * Update MAC, using dataplane context object. | |
4706 | */ | |
4707 | ||
67e3369e JU |
4708 | enum netlink_msg_status netlink_put_mac_update_msg(struct nl_batch *bth, |
4709 | struct zebra_dplane_ctx *ctx) | |
4710 | { | |
4711 | return netlink_batch_add_msg(bth, ctx, netlink_macfdb_update_ctx, | |
4712 | false); | |
4713 | } | |
4714 | ||
67e3369e JU |
4715 | enum netlink_msg_status |
4716 | netlink_put_neigh_update_msg(struct nl_batch *bth, struct zebra_dplane_ctx *ctx) | |
4717 | { | |
4718 | return netlink_batch_add_msg(bth, ctx, netlink_neigh_msg_encoder, | |
4719 | false); | |
6fe2b0e6 CS |
4720 | } |
4721 | ||
16c628de MS |
4722 | /* |
4723 | * MPLS label forwarding table change via netlink interface, using dataplane | |
4724 | * context information. | |
4725 | */ | |
0be6e7d7 JU |
4726 | ssize_t netlink_mpls_multipath_msg_encode(int cmd, struct zebra_dplane_ctx *ctx, |
4727 | void *buf, size_t buflen) | |
16c628de MS |
4728 | { |
4729 | mpls_lse_t lse; | |
ee70f629 | 4730 | const struct nhlfe_list_head *head; |
f2595bd5 | 4731 | const struct zebra_nhlfe *nhlfe; |
16c628de MS |
4732 | struct nexthop *nexthop = NULL; |
4733 | unsigned int nexthop_num; | |
4734 | const char *routedesc; | |
4735 | int route_type; | |
9a0132a5 | 4736 | struct prefix p = {0}; |
d4000d7b DS |
4737 | struct nlsock *nl = |
4738 | kernel_netlink_nlsock_lookup(dplane_ctx_get_ns_sock(ctx)); | |
16c628de MS |
4739 | |
4740 | struct { | |
4741 | struct nlmsghdr n; | |
4742 | struct rtmsg r; | |
0be6e7d7 JU |
4743 | char buf[0]; |
4744 | } *req = buf; | |
4745 | ||
4746 | if (buflen < sizeof(*req)) | |
4747 | return 0; | |
16c628de | 4748 | |
0be6e7d7 | 4749 | memset(req, 0, sizeof(*req)); |
16c628de MS |
4750 | |
4751 | /* | |
4752 | * Count # nexthops so we can decide whether to use singlepath | |
4753 | * or multipath case. | |
4754 | */ | |
4755 | nexthop_num = 0; | |
ee70f629 MS |
4756 | head = dplane_ctx_get_nhlfe_list(ctx); |
4757 | frr_each(nhlfe_list_const, head, nhlfe) { | |
16c628de MS |
4758 | nexthop = nhlfe->nexthop; |
4759 | if (!nexthop) | |
4760 | continue; | |
4761 | if (cmd == RTM_NEWROUTE) { | |
4762 | /* Count all selected NHLFEs */ | |
4763 | if (CHECK_FLAG(nhlfe->flags, NHLFE_FLAG_SELECTED) | |
4764 | && CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE)) | |
4765 | nexthop_num++; | |
4766 | } else { /* DEL */ | |
4767 | /* Count all installed NHLFEs */ | |
4768 | if (CHECK_FLAG(nhlfe->flags, NHLFE_FLAG_INSTALLED) | |
4769 | && CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB)) | |
4770 | nexthop_num++; | |
4771 | } | |
4772 | } | |
4773 | ||
4774 | if ((nexthop_num == 0) || | |
4775 | (!dplane_ctx_get_best_nhlfe(ctx) && (cmd != RTM_DELROUTE))) | |
4776 | return 0; | |
4777 | ||
0be6e7d7 JU |
4778 | req->n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)); |
4779 | req->n.nlmsg_flags = NLM_F_CREATE | NLM_F_REQUEST; | |
4780 | req->n.nlmsg_type = cmd; | |
d4000d7b | 4781 | req->n.nlmsg_pid = nl->snl.nl_pid; |
16c628de | 4782 | |
0be6e7d7 JU |
4783 | req->r.rtm_family = AF_MPLS; |
4784 | req->r.rtm_table = RT_TABLE_MAIN; | |
4785 | req->r.rtm_dst_len = MPLS_LABEL_LEN_BITS; | |
4786 | req->r.rtm_scope = RT_SCOPE_UNIVERSE; | |
4787 | req->r.rtm_type = RTN_UNICAST; | |
16c628de MS |
4788 | |
4789 | if (cmd == RTM_NEWROUTE) { | |
4790 | /* We do a replace to handle update. */ | |
0be6e7d7 | 4791 | req->n.nlmsg_flags |= NLM_F_REPLACE; |
16c628de MS |
4792 | |
4793 | /* set the protocol value if installing */ | |
4794 | route_type = re_type_from_lsp_type( | |
4795 | dplane_ctx_get_best_nhlfe(ctx)->type); | |
0be6e7d7 | 4796 | req->r.rtm_protocol = zebra2proto(route_type); |
16c628de MS |
4797 | } |
4798 | ||
4799 | /* Fill destination */ | |
4800 | lse = mpls_lse_encode(dplane_ctx_get_in_label(ctx), 0, 0, 1); | |
0be6e7d7 JU |
4801 | if (!nl_attr_put(&req->n, buflen, RTA_DST, &lse, sizeof(mpls_lse_t))) |
4802 | return 0; | |
16c628de MS |
4803 | |
4804 | /* Fill nexthops (paths) based on single-path or multipath. The paths | |
4805 | * chosen depend on the operation. | |
4806 | */ | |
fc608372 | 4807 | if (nexthop_num == 1) { |
16c628de MS |
4808 | routedesc = "single-path"; |
4809 | _netlink_mpls_debug(cmd, dplane_ctx_get_in_label(ctx), | |
4810 | routedesc); | |
4811 | ||
4812 | nexthop_num = 0; | |
ee70f629 | 4813 | frr_each(nhlfe_list_const, head, nhlfe) { |
16c628de MS |
4814 | nexthop = nhlfe->nexthop; |
4815 | if (!nexthop) | |
4816 | continue; | |
4817 | ||
4818 | if ((cmd == RTM_NEWROUTE | |
4819 | && (CHECK_FLAG(nhlfe->flags, NHLFE_FLAG_SELECTED) | |
4820 | && CHECK_FLAG(nexthop->flags, | |
4821 | NEXTHOP_FLAG_ACTIVE))) | |
4822 | || (cmd == RTM_DELROUTE | |
4823 | && (CHECK_FLAG(nhlfe->flags, | |
4824 | NHLFE_FLAG_INSTALLED) | |
4825 | && CHECK_FLAG(nexthop->flags, | |
4826 | NEXTHOP_FLAG_FIB)))) { | |
4827 | /* Add the gateway */ | |
0be6e7d7 JU |
4828 | if (!_netlink_mpls_build_singlepath( |
4829 | &p, routedesc, nhlfe, &req->n, | |
4830 | &req->r, buflen, cmd)) | |
4831 | return false; | |
16c628de MS |
4832 | |
4833 | nexthop_num++; | |
4834 | break; | |
4835 | } | |
4836 | } | |
4837 | } else { /* Multipath case */ | |
312a6bee | 4838 | struct rtattr *nest; |
81793ac1 | 4839 | const union g_addr *src1 = NULL; |
16c628de | 4840 | |
0be6e7d7 JU |
4841 | nest = nl_attr_nest(&req->n, buflen, RTA_MULTIPATH); |
4842 | if (!nest) | |
4843 | return 0; | |
16c628de MS |
4844 | |
4845 | routedesc = "multipath"; | |
4846 | _netlink_mpls_debug(cmd, dplane_ctx_get_in_label(ctx), | |
4847 | routedesc); | |
4848 | ||
4849 | nexthop_num = 0; | |
ee70f629 | 4850 | frr_each(nhlfe_list_const, head, nhlfe) { |
16c628de MS |
4851 | nexthop = nhlfe->nexthop; |
4852 | if (!nexthop) | |
4853 | continue; | |
4854 | ||
16c628de MS |
4855 | if ((cmd == RTM_NEWROUTE |
4856 | && (CHECK_FLAG(nhlfe->flags, NHLFE_FLAG_SELECTED) | |
4857 | && CHECK_FLAG(nexthop->flags, | |
4858 | NEXTHOP_FLAG_ACTIVE))) | |
4859 | || (cmd == RTM_DELROUTE | |
4860 | && (CHECK_FLAG(nhlfe->flags, | |
4861 | NHLFE_FLAG_INSTALLED) | |
4862 | && CHECK_FLAG(nexthop->flags, | |
4863 | NEXTHOP_FLAG_FIB)))) { | |
4864 | nexthop_num++; | |
4865 | ||
4866 | /* Build the multipath */ | |
0be6e7d7 JU |
4867 | if (!_netlink_mpls_build_multipath( |
4868 | &p, routedesc, nhlfe, &req->n, | |
4869 | buflen, &req->r, &src1)) | |
4870 | return 0; | |
16c628de MS |
4871 | } |
4872 | } | |
4873 | ||
4874 | /* Add the multipath */ | |
0be6e7d7 | 4875 | nl_attr_nest_end(&req->n, nest); |
16c628de MS |
4876 | } |
4877 | ||
0be6e7d7 | 4878 | return NLMSG_ALIGN(req->n.nlmsg_len); |
16c628de | 4879 | } |
506efd37 AK |
4880 | |
4881 | /**************************************************************************** | |
4882 | * This code was developed in a branch that didn't have dplane APIs for | |
4883 | * MAC updates. Hence the use of the legacy style. It will be moved to | |
4884 | * the new dplane style pre-merge to master. XXX | |
4885 | */ | |
4886 | static int netlink_fdb_nh_update(uint32_t nh_id, struct in_addr vtep_ip) | |
4887 | { | |
4888 | struct { | |
4889 | struct nlmsghdr n; | |
4890 | struct nhmsg nhm; | |
4891 | char buf[256]; | |
4892 | } req; | |
4893 | int cmd = RTM_NEWNEXTHOP; | |
4894 | struct zebra_vrf *zvrf; | |
4895 | struct zebra_ns *zns; | |
4896 | ||
4897 | zvrf = zebra_vrf_get_evpn(); | |
506efd37 AK |
4898 | zns = zvrf->zns; |
4899 | ||
4900 | memset(&req, 0, sizeof(req)); | |
4901 | ||
4902 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct nhmsg)); | |
4903 | req.n.nlmsg_flags = NLM_F_REQUEST; | |
4904 | req.n.nlmsg_flags |= (NLM_F_CREATE | NLM_F_REPLACE); | |
4905 | req.n.nlmsg_type = cmd; | |
4906 | req.nhm.nh_family = AF_INET; | |
4907 | ||
4908 | if (!nl_attr_put32(&req.n, sizeof(req), NHA_ID, nh_id)) | |
4909 | return -1; | |
4910 | if (!nl_attr_put(&req.n, sizeof(req), NHA_FDB, NULL, 0)) | |
4911 | return -1; | |
4912 | if (!nl_attr_put(&req.n, sizeof(req), NHA_GATEWAY, | |
4913 | &vtep_ip, IPV4_MAX_BYTELEN)) | |
4914 | return -1; | |
4915 | ||
4916 | if (IS_ZEBRA_DEBUG_KERNEL || IS_ZEBRA_DEBUG_EVPN_MH_NH) { | |
9bcef951 MS |
4917 | zlog_debug("Tx %s fdb-nh 0x%x %pI4", |
4918 | nl_msg_type_to_str(cmd), nh_id, &vtep_ip); | |
506efd37 AK |
4919 | } |
4920 | ||
4921 | return netlink_talk(netlink_talk_filter, &req.n, &zns->netlink_cmd, zns, | |
9bfadae8 | 4922 | false); |
506efd37 AK |
4923 | } |
4924 | ||
4925 | static int netlink_fdb_nh_del(uint32_t nh_id) | |
4926 | { | |
4927 | struct { | |
4928 | struct nlmsghdr n; | |
4929 | struct nhmsg nhm; | |
4930 | char buf[256]; | |
4931 | } req; | |
4932 | int cmd = RTM_DELNEXTHOP; | |
4933 | struct zebra_vrf *zvrf; | |
4934 | struct zebra_ns *zns; | |
4935 | ||
4936 | zvrf = zebra_vrf_get_evpn(); | |
506efd37 AK |
4937 | zns = zvrf->zns; |
4938 | ||
4939 | memset(&req, 0, sizeof(req)); | |
4940 | ||
4941 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct nhmsg)); | |
4942 | req.n.nlmsg_flags = NLM_F_REQUEST; | |
4943 | req.n.nlmsg_type = cmd; | |
4944 | req.nhm.nh_family = AF_UNSPEC; | |
4945 | ||
4946 | if (!nl_attr_put32(&req.n, sizeof(req), NHA_ID, nh_id)) | |
4947 | return -1; | |
4948 | ||
4949 | if (IS_ZEBRA_DEBUG_KERNEL || IS_ZEBRA_DEBUG_EVPN_MH_NH) { | |
4950 | zlog_debug("Tx %s fdb-nh 0x%x", | |
4951 | nl_msg_type_to_str(cmd), nh_id); | |
4952 | } | |
4953 | ||
4954 | return netlink_talk(netlink_talk_filter, &req.n, &zns->netlink_cmd, zns, | |
9bfadae8 | 4955 | false); |
506efd37 AK |
4956 | } |
4957 | ||
4958 | static int netlink_fdb_nhg_update(uint32_t nhg_id, uint32_t nh_cnt, | |
4959 | struct nh_grp *nh_ids) | |
4960 | { | |
4961 | struct { | |
4962 | struct nlmsghdr n; | |
4963 | struct nhmsg nhm; | |
4964 | char buf[256]; | |
4965 | } req; | |
4966 | int cmd = RTM_NEWNEXTHOP; | |
4967 | struct zebra_vrf *zvrf; | |
4968 | struct zebra_ns *zns; | |
4969 | struct nexthop_grp grp[nh_cnt]; | |
4970 | uint32_t i; | |
4971 | ||
4972 | zvrf = zebra_vrf_get_evpn(); | |
506efd37 AK |
4973 | zns = zvrf->zns; |
4974 | ||
4975 | memset(&req, 0, sizeof(req)); | |
4976 | ||
4977 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct nhmsg)); | |
4978 | req.n.nlmsg_flags = NLM_F_REQUEST; | |
4979 | req.n.nlmsg_flags |= (NLM_F_CREATE | NLM_F_REPLACE); | |
4980 | req.n.nlmsg_type = cmd; | |
4981 | req.nhm.nh_family = AF_UNSPEC; | |
4982 | ||
4983 | if (!nl_attr_put32(&req.n, sizeof(req), NHA_ID, nhg_id)) | |
4984 | return -1; | |
4985 | if (!nl_attr_put(&req.n, sizeof(req), NHA_FDB, NULL, 0)) | |
4986 | return -1; | |
4987 | memset(&grp, 0, sizeof(grp)); | |
4988 | for (i = 0; i < nh_cnt; ++i) { | |
4989 | grp[i].id = nh_ids[i].id; | |
4990 | grp[i].weight = nh_ids[i].weight; | |
4991 | } | |
4992 | if (!nl_attr_put(&req.n, sizeof(req), NHA_GROUP, | |
4993 | grp, nh_cnt * sizeof(struct nexthop_grp))) | |
4994 | return -1; | |
4995 | ||
4996 | ||
4997 | if (IS_ZEBRA_DEBUG_KERNEL || IS_ZEBRA_DEBUG_EVPN_MH_NH) { | |
4998 | char vtep_str[ES_VTEP_LIST_STR_SZ]; | |
9e0c2fd1 | 4999 | char nh_buf[16]; |
506efd37 AK |
5000 | |
5001 | vtep_str[0] = '\0'; | |
5002 | for (i = 0; i < nh_cnt; ++i) { | |
9e0c2fd1 | 5003 | snprintf(nh_buf, sizeof(nh_buf), "%u ", |
506efd37 | 5004 | grp[i].id); |
9e0c2fd1 | 5005 | strlcat(vtep_str, nh_buf, sizeof(vtep_str)); |
506efd37 AK |
5006 | } |
5007 | ||
5008 | zlog_debug("Tx %s fdb-nhg 0x%x %s", | |
5009 | nl_msg_type_to_str(cmd), nhg_id, vtep_str); | |
5010 | } | |
5011 | ||
5012 | return netlink_talk(netlink_talk_filter, &req.n, &zns->netlink_cmd, zns, | |
9bfadae8 | 5013 | false); |
506efd37 AK |
5014 | } |
5015 | ||
5016 | static int netlink_fdb_nhg_del(uint32_t nhg_id) | |
5017 | { | |
5018 | return netlink_fdb_nh_del(nhg_id); | |
5019 | } | |
5020 | ||
5021 | int kernel_upd_mac_nh(uint32_t nh_id, struct in_addr vtep_ip) | |
5022 | { | |
5023 | return netlink_fdb_nh_update(nh_id, vtep_ip); | |
5024 | } | |
5025 | ||
5026 | int kernel_del_mac_nh(uint32_t nh_id) | |
5027 | { | |
5028 | return netlink_fdb_nh_del(nh_id); | |
5029 | } | |
5030 | ||
5031 | int kernel_upd_mac_nhg(uint32_t nhg_id, uint32_t nh_cnt, | |
5032 | struct nh_grp *nh_ids) | |
5033 | { | |
5034 | return netlink_fdb_nhg_update(nhg_id, nh_cnt, nh_ids); | |
5035 | } | |
5036 | ||
5037 | int kernel_del_mac_nhg(uint32_t nhg_id) | |
5038 | { | |
5039 | return netlink_fdb_nhg_del(nhg_id); | |
5040 | } | |
5041 | ||
ddfeb486 | 5042 | #endif /* HAVE_NETLINK */ |