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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 | ||
8755598a DS |
156 | /* |
157 | * The ipv4_ll data structure is used for all 5549 | |
158 | * additions to the kernel. Let's figure out the | |
159 | * correct value one time instead for every | |
160 | * install/remove of a 5549 type route | |
161 | */ | |
d62a17ae | 162 | void rt_netlink_init(void) |
8755598a | 163 | { |
d62a17ae | 164 | inet_pton(AF_INET, ipv4_ll_buf, &ipv4_ll); |
8755598a DS |
165 | } |
166 | ||
931fa60c MS |
167 | /* |
168 | * Mapping from dataplane neighbor flags to netlink flags | |
169 | */ | |
170 | static uint8_t neigh_flags_to_netlink(uint8_t dplane_flags) | |
171 | { | |
172 | uint8_t flags = 0; | |
173 | ||
174 | if (dplane_flags & DPLANE_NTF_EXT_LEARNED) | |
175 | flags |= NTF_EXT_LEARNED; | |
176 | if (dplane_flags & DPLANE_NTF_ROUTER) | |
177 | flags |= NTF_ROUTER; | |
d68e74b4 JU |
178 | if (dplane_flags & DPLANE_NTF_USE) |
179 | flags |= NTF_USE; | |
931fa60c MS |
180 | |
181 | return flags; | |
182 | } | |
183 | ||
184 | /* | |
185 | * Mapping from dataplane neighbor state to netlink state | |
186 | */ | |
187 | static uint16_t neigh_state_to_netlink(uint16_t dplane_state) | |
188 | { | |
189 | uint16_t state = 0; | |
190 | ||
191 | if (dplane_state & DPLANE_NUD_REACHABLE) | |
192 | state |= NUD_REACHABLE; | |
193 | if (dplane_state & DPLANE_NUD_STALE) | |
194 | state |= NUD_STALE; | |
195 | if (dplane_state & DPLANE_NUD_NOARP) | |
196 | state |= NUD_NOARP; | |
197 | if (dplane_state & DPLANE_NUD_PROBE) | |
198 | state |= NUD_PROBE; | |
d68e74b4 JU |
199 | if (dplane_state & DPLANE_NUD_INCOMPLETE) |
200 | state |= NUD_INCOMPLETE; | |
0a27a2fe PG |
201 | if (dplane_state & DPLANE_NUD_PERMANENT) |
202 | state |= NUD_PERMANENT; | |
203 | if (dplane_state & DPLANE_NUD_FAILED) | |
204 | state |= NUD_FAILED; | |
931fa60c MS |
205 | |
206 | return state; | |
207 | } | |
208 | ||
209 | ||
6a6d11a3 | 210 | static inline bool is_selfroute(int proto) |
23b1f334 | 211 | { |
d62a17ae | 212 | if ((proto == RTPROT_BGP) || (proto == RTPROT_OSPF) |
d4d71f11 | 213 | || (proto == RTPROT_ZSTATIC) || (proto == RTPROT_ZEBRA) |
d62a17ae | 214 | || (proto == RTPROT_ISIS) || (proto == RTPROT_RIPNG) |
215 | || (proto == RTPROT_NHRP) || (proto == RTPROT_EIGRP) | |
915902cb | 216 | || (proto == RTPROT_LDP) || (proto == RTPROT_BABEL) |
0761368a | 217 | || (proto == RTPROT_RIP) || (proto == RTPROT_SHARP) |
31f937fb SM |
218 | || (proto == RTPROT_PBR) || (proto == RTPROT_OPENFABRIC) |
219 | || (proto == RTPROT_SRTE)) { | |
6a6d11a3 | 220 | return true; |
d62a17ae | 221 | } |
222 | ||
6a6d11a3 | 223 | return false; |
23b1f334 DD |
224 | } |
225 | ||
915902cb | 226 | static inline int zebra2proto(int proto) |
23b1f334 | 227 | { |
d62a17ae | 228 | switch (proto) { |
229 | case ZEBRA_ROUTE_BABEL: | |
230 | proto = RTPROT_BABEL; | |
231 | break; | |
232 | case ZEBRA_ROUTE_BGP: | |
233 | proto = RTPROT_BGP; | |
234 | break; | |
235 | case ZEBRA_ROUTE_OSPF: | |
236 | case ZEBRA_ROUTE_OSPF6: | |
237 | proto = RTPROT_OSPF; | |
238 | break; | |
239 | case ZEBRA_ROUTE_STATIC: | |
d4d71f11 | 240 | proto = RTPROT_ZSTATIC; |
d62a17ae | 241 | break; |
242 | case ZEBRA_ROUTE_ISIS: | |
243 | proto = RTPROT_ISIS; | |
244 | break; | |
245 | case ZEBRA_ROUTE_RIP: | |
246 | proto = RTPROT_RIP; | |
247 | break; | |
248 | case ZEBRA_ROUTE_RIPNG: | |
249 | proto = RTPROT_RIPNG; | |
250 | break; | |
251 | case ZEBRA_ROUTE_NHRP: | |
252 | proto = RTPROT_NHRP; | |
253 | break; | |
254 | case ZEBRA_ROUTE_EIGRP: | |
255 | proto = RTPROT_EIGRP; | |
256 | break; | |
257 | case ZEBRA_ROUTE_LDP: | |
258 | proto = RTPROT_LDP; | |
259 | break; | |
8a71d93d DS |
260 | case ZEBRA_ROUTE_SHARP: |
261 | proto = RTPROT_SHARP; | |
262 | break; | |
0761368a DS |
263 | case ZEBRA_ROUTE_PBR: |
264 | proto = RTPROT_PBR; | |
265 | break; | |
da82f6b4 CF |
266 | case ZEBRA_ROUTE_OPENFABRIC: |
267 | proto = RTPROT_OPENFABRIC; | |
268 | break; | |
31f937fb SM |
269 | case ZEBRA_ROUTE_SRTE: |
270 | proto = RTPROT_SRTE; | |
271 | break; | |
a56ec5c0 | 272 | case ZEBRA_ROUTE_TABLE: |
38e40db1 | 273 | case ZEBRA_ROUTE_NHG: |
a56ec5c0 DS |
274 | proto = RTPROT_ZEBRA; |
275 | break; | |
911d4d48 DE |
276 | case ZEBRA_ROUTE_CONNECT: |
277 | case ZEBRA_ROUTE_KERNEL: | |
278 | proto = RTPROT_KERNEL; | |
279 | break; | |
d62a17ae | 280 | default: |
0761368a DS |
281 | /* |
282 | * When a user adds a new protocol this will show up | |
283 | * to let them know to do something about it. This | |
284 | * is intentionally a warn because we should see | |
285 | * this as part of development of a new protocol | |
286 | */ | |
9df414fe QY |
287 | zlog_debug( |
288 | "%s: Please add this protocol(%d) to proper rt_netlink.c handling", | |
15569c58 | 289 | __func__, proto); |
d62a17ae | 290 | proto = RTPROT_ZEBRA; |
291 | break; | |
292 | } | |
293 | ||
294 | return proto; | |
23b1f334 DD |
295 | } |
296 | ||
38e40db1 | 297 | static inline int proto2zebra(int proto, int family, bool is_nexthop) |
915902cb DS |
298 | { |
299 | switch (proto) { | |
300 | case RTPROT_BABEL: | |
301 | proto = ZEBRA_ROUTE_BABEL; | |
302 | break; | |
303 | case RTPROT_BGP: | |
304 | proto = ZEBRA_ROUTE_BGP; | |
305 | break; | |
306 | case RTPROT_OSPF: | |
d6816f68 DS |
307 | proto = (family == AF_INET) ? ZEBRA_ROUTE_OSPF |
308 | : ZEBRA_ROUTE_OSPF6; | |
915902cb DS |
309 | break; |
310 | case RTPROT_ISIS: | |
311 | proto = ZEBRA_ROUTE_ISIS; | |
312 | break; | |
313 | case RTPROT_RIP: | |
314 | proto = ZEBRA_ROUTE_RIP; | |
315 | break; | |
316 | case RTPROT_RIPNG: | |
317 | proto = ZEBRA_ROUTE_RIPNG; | |
318 | break; | |
319 | case RTPROT_NHRP: | |
320 | proto = ZEBRA_ROUTE_NHRP; | |
321 | break; | |
322 | case RTPROT_EIGRP: | |
323 | proto = ZEBRA_ROUTE_EIGRP; | |
324 | break; | |
325 | case RTPROT_LDP: | |
326 | proto = ZEBRA_ROUTE_LDP; | |
327 | break; | |
328 | case RTPROT_STATIC: | |
d4d71f11 | 329 | case RTPROT_ZSTATIC: |
915902cb DS |
330 | proto = ZEBRA_ROUTE_STATIC; |
331 | break; | |
0761368a DS |
332 | case RTPROT_SHARP: |
333 | proto = ZEBRA_ROUTE_SHARP; | |
334 | break; | |
335 | case RTPROT_PBR: | |
336 | proto = ZEBRA_ROUTE_PBR; | |
337 | break; | |
da82f6b4 CF |
338 | case RTPROT_OPENFABRIC: |
339 | proto = ZEBRA_ROUTE_OPENFABRIC; | |
340 | break; | |
31f937fb SM |
341 | case RTPROT_SRTE: |
342 | proto = ZEBRA_ROUTE_SRTE; | |
343 | break; | |
b09388f0 DS |
344 | case RTPROT_UNSPEC: |
345 | case RTPROT_REDIRECT: | |
346 | case RTPROT_KERNEL: | |
347 | case RTPROT_BOOT: | |
348 | case RTPROT_GATED: | |
349 | case RTPROT_RA: | |
350 | case RTPROT_MRT: | |
351 | case RTPROT_BIRD: | |
352 | case RTPROT_DNROUTED: | |
353 | case RTPROT_XORP: | |
354 | case RTPROT_NTK: | |
355 | case RTPROT_MROUTED: | |
356 | case RTPROT_KEEPALIVED: | |
357 | case RTPROT_OPENR: | |
358 | proto = ZEBRA_ROUTE_KERNEL; | |
359 | break; | |
38e40db1 SW |
360 | case RTPROT_ZEBRA: |
361 | if (is_nexthop) { | |
362 | proto = ZEBRA_ROUTE_NHG; | |
363 | break; | |
364 | } | |
365 | /* Intentional fall thru */ | |
915902cb | 366 | default: |
0761368a DS |
367 | /* |
368 | * When a user adds a new protocol this will show up | |
369 | * to let them know to do something about it. This | |
370 | * is intentionally a warn because we should see | |
371 | * this as part of development of a new protocol | |
372 | */ | |
9df414fe QY |
373 | zlog_debug( |
374 | "%s: Please add this protocol(%d) to proper rt_netlink.c handling", | |
15569c58 | 375 | __func__, proto); |
915902cb DS |
376 | proto = ZEBRA_ROUTE_KERNEL; |
377 | break; | |
378 | } | |
379 | return proto; | |
380 | } | |
381 | ||
12f6fb97 DS |
382 | /* |
383 | Pending: create an efficient table_id (in a tree/hash) based lookup) | |
384 | */ | |
9d866c07 | 385 | vrf_id_t vrf_lookup_by_table(uint32_t table_id, ns_id_t ns_id) |
12f6fb97 | 386 | { |
d62a17ae | 387 | struct vrf *vrf; |
388 | struct zebra_vrf *zvrf; | |
12f6fb97 | 389 | |
a2addae8 | 390 | RB_FOREACH (vrf, vrf_id_head, &vrfs_by_id) { |
78dd30b2 PG |
391 | zvrf = vrf->info; |
392 | if (zvrf == NULL) | |
d62a17ae | 393 | continue; |
78dd30b2 PG |
394 | /* case vrf with netns : match the netnsid */ |
395 | if (vrf_is_backend_netns()) { | |
396 | if (ns_id == zvrf_id(zvrf)) | |
397 | return zvrf_id(zvrf); | |
398 | } else { | |
399 | /* VRF is VRF_BACKEND_VRF_LITE */ | |
400 | if (zvrf->table_id != table_id) | |
401 | continue; | |
402 | return zvrf_id(zvrf); | |
403 | } | |
d62a17ae | 404 | } |
12f6fb97 | 405 | |
d62a17ae | 406 | return VRF_DEFAULT; |
12f6fb97 DS |
407 | } |
408 | ||
87da6a60 SW |
409 | /** |
410 | * @parse_encap_mpls() - Parses encapsulated mpls attributes | |
411 | * @tb: Pointer to rtattr to look for nested items in. | |
412 | * @labels: Pointer to store labels in. | |
413 | * | |
414 | * Return: Number of mpls labels found. | |
415 | */ | |
416 | static int parse_encap_mpls(struct rtattr *tb, mpls_label_t *labels) | |
417 | { | |
418 | struct rtattr *tb_encap[MPLS_IPTUNNEL_MAX + 1] = {0}; | |
419 | mpls_lse_t *lses = NULL; | |
420 | int num_labels = 0; | |
421 | uint32_t ttl = 0; | |
422 | uint32_t bos = 0; | |
423 | uint32_t exp = 0; | |
424 | mpls_label_t label = 0; | |
425 | ||
426 | netlink_parse_rtattr_nested(tb_encap, MPLS_IPTUNNEL_MAX, tb); | |
427 | lses = (mpls_lse_t *)RTA_DATA(tb_encap[MPLS_IPTUNNEL_DST]); | |
428 | while (!bos && num_labels < MPLS_MAX_LABELS) { | |
429 | mpls_lse_decode(lses[num_labels], &label, &ttl, &exp, &bos); | |
430 | labels[num_labels++] = label; | |
431 | } | |
432 | ||
433 | return num_labels; | |
434 | } | |
435 | ||
d49e6c4a HS |
436 | static enum seg6local_action_t |
437 | parse_encap_seg6local(struct rtattr *tb, | |
438 | struct seg6local_context *ctx) | |
439 | { | |
ce39ca16 | 440 | struct rtattr *tb_encap[SEG6_LOCAL_MAX + 1] = {}; |
d49e6c4a HS |
441 | enum seg6local_action_t act = ZEBRA_SEG6_LOCAL_ACTION_UNSPEC; |
442 | ||
ce39ca16 | 443 | netlink_parse_rtattr_nested(tb_encap, SEG6_LOCAL_MAX, tb); |
d49e6c4a HS |
444 | |
445 | if (tb_encap[SEG6_LOCAL_ACTION]) | |
446 | act = *(uint32_t *)RTA_DATA(tb_encap[SEG6_LOCAL_ACTION]); | |
447 | ||
448 | if (tb_encap[SEG6_LOCAL_NH4]) | |
449 | ctx->nh4 = *(struct in_addr *)RTA_DATA( | |
450 | tb_encap[SEG6_LOCAL_NH4]); | |
451 | ||
452 | if (tb_encap[SEG6_LOCAL_NH6]) | |
453 | ctx->nh6 = *(struct in6_addr *)RTA_DATA( | |
454 | tb_encap[SEG6_LOCAL_NH6]); | |
455 | ||
456 | if (tb_encap[SEG6_LOCAL_TABLE]) | |
457 | ctx->table = *(uint32_t *)RTA_DATA(tb_encap[SEG6_LOCAL_TABLE]); | |
458 | ||
7eab60a7 RS |
459 | if (tb_encap[SEG6_LOCAL_VRFTABLE]) |
460 | ctx->table = | |
461 | *(uint32_t *)RTA_DATA(tb_encap[SEG6_LOCAL_VRFTABLE]); | |
462 | ||
d49e6c4a HS |
463 | return act; |
464 | } | |
465 | ||
f16de90b HS |
466 | static int parse_encap_seg6(struct rtattr *tb, struct in6_addr *segs) |
467 | { | |
ce39ca16 | 468 | struct rtattr *tb_encap[SEG6_IPTUNNEL_MAX + 1] = {}; |
f16de90b HS |
469 | struct seg6_iptunnel_encap *ipt = NULL; |
470 | struct in6_addr *segments = NULL; | |
471 | ||
ce39ca16 | 472 | netlink_parse_rtattr_nested(tb_encap, SEG6_IPTUNNEL_MAX, tb); |
f16de90b HS |
473 | |
474 | /* | |
475 | * TODO: It's not support multiple SID list. | |
476 | */ | |
477 | if (tb_encap[SEG6_IPTUNNEL_SRH]) { | |
478 | ipt = (struct seg6_iptunnel_encap *) | |
479 | RTA_DATA(tb_encap[SEG6_IPTUNNEL_SRH]); | |
480 | segments = ipt->srh[0].segments; | |
481 | *segs = segments[0]; | |
482 | return 1; | |
483 | } | |
484 | ||
485 | return 0; | |
486 | } | |
487 | ||
488 | ||
77a44d94 SW |
489 | static struct nexthop |
490 | parse_nexthop_unicast(ns_id_t ns_id, struct rtmsg *rtm, struct rtattr **tb, | |
491 | enum blackhole_type bh_type, int index, void *prefsrc, | |
20822f9d | 492 | void *gate, afi_t afi, vrf_id_t vrf_id) |
77a44d94 SW |
493 | { |
494 | struct interface *ifp = NULL; | |
495 | struct nexthop nh = {0}; | |
496 | mpls_label_t labels[MPLS_MAX_LABELS] = {0}; | |
497 | int num_labels = 0; | |
b9596f13 | 498 | enum seg6local_action_t seg6l_act = ZEBRA_SEG6_LOCAL_ACTION_UNSPEC; |
1bda3e62 HS |
499 | struct seg6local_context seg6l_ctx = {}; |
500 | struct in6_addr seg6_segs = {}; | |
f16de90b | 501 | int num_segs = 0; |
77a44d94 | 502 | |
20822f9d | 503 | vrf_id_t nh_vrf_id = vrf_id; |
77a44d94 SW |
504 | size_t sz = (afi == AFI_IP) ? 4 : 16; |
505 | ||
506 | if (bh_type == BLACKHOLE_UNSPEC) { | |
507 | if (index && !gate) | |
508 | nh.type = NEXTHOP_TYPE_IFINDEX; | |
509 | else if (index && gate) | |
510 | nh.type = (afi == AFI_IP) ? NEXTHOP_TYPE_IPV4_IFINDEX | |
511 | : NEXTHOP_TYPE_IPV6_IFINDEX; | |
512 | else if (!index && gate) | |
513 | nh.type = (afi == AFI_IP) ? NEXTHOP_TYPE_IPV4 | |
514 | : NEXTHOP_TYPE_IPV6; | |
515 | else { | |
516 | nh.type = NEXTHOP_TYPE_BLACKHOLE; | |
517 | nh.bh_type = bh_type; | |
518 | } | |
519 | } else { | |
520 | nh.type = NEXTHOP_TYPE_BLACKHOLE; | |
521 | nh.bh_type = bh_type; | |
522 | } | |
523 | nh.ifindex = index; | |
524 | if (prefsrc) | |
525 | memcpy(&nh.src, prefsrc, sz); | |
526 | if (gate) | |
527 | memcpy(&nh.gate, gate, sz); | |
528 | ||
529 | if (index) { | |
530 | ifp = if_lookup_by_index_per_ns(zebra_ns_lookup(ns_id), index); | |
531 | if (ifp) | |
096f7609 | 532 | nh_vrf_id = ifp->vrf->vrf_id; |
77a44d94 SW |
533 | } |
534 | nh.vrf_id = nh_vrf_id; | |
535 | ||
536 | if (tb[RTA_ENCAP] && tb[RTA_ENCAP_TYPE] | |
537 | && *(uint16_t *)RTA_DATA(tb[RTA_ENCAP_TYPE]) | |
538 | == LWTUNNEL_ENCAP_MPLS) { | |
539 | num_labels = parse_encap_mpls(tb[RTA_ENCAP], labels); | |
540 | } | |
d49e6c4a HS |
541 | if (tb[RTA_ENCAP] && tb[RTA_ENCAP_TYPE] |
542 | && *(uint16_t *)RTA_DATA(tb[RTA_ENCAP_TYPE]) | |
543 | == LWTUNNEL_ENCAP_SEG6_LOCAL) { | |
544 | seg6l_act = parse_encap_seg6local(tb[RTA_ENCAP], &seg6l_ctx); | |
545 | } | |
f16de90b HS |
546 | if (tb[RTA_ENCAP] && tb[RTA_ENCAP_TYPE] |
547 | && *(uint16_t *)RTA_DATA(tb[RTA_ENCAP_TYPE]) | |
548 | == LWTUNNEL_ENCAP_SEG6) { | |
549 | num_segs = parse_encap_seg6(tb[RTA_ENCAP], &seg6_segs); | |
550 | } | |
77a44d94 SW |
551 | |
552 | if (rtm->rtm_flags & RTNH_F_ONLINK) | |
553 | SET_FLAG(nh.flags, NEXTHOP_FLAG_ONLINK); | |
554 | ||
c704cb44 DS |
555 | if (rtm->rtm_flags & RTNH_F_LINKDOWN) |
556 | SET_FLAG(nh.flags, NEXTHOP_FLAG_LINKDOWN); | |
557 | ||
77a44d94 SW |
558 | if (num_labels) |
559 | nexthop_add_labels(&nh, ZEBRA_LSP_STATIC, num_labels, labels); | |
560 | ||
d49e6c4a | 561 | if (seg6l_act != ZEBRA_SEG6_LOCAL_ACTION_UNSPEC) |
eab0f8f0 | 562 | nexthop_add_srv6_seg6local(&nh, seg6l_act, &seg6l_ctx); |
d49e6c4a | 563 | |
f16de90b | 564 | if (num_segs) |
eab0f8f0 | 565 | nexthop_add_srv6_seg6(&nh, &seg6_segs); |
f16de90b | 566 | |
77a44d94 SW |
567 | return nh; |
568 | } | |
569 | ||
20822f9d | 570 | static uint8_t parse_multipath_nexthops_unicast(ns_id_t ns_id, |
0eb97b86 | 571 | struct nexthop_group *ng, |
20822f9d SW |
572 | struct rtmsg *rtm, |
573 | struct rtnexthop *rtnh, | |
574 | struct rtattr **tb, | |
575 | void *prefsrc, vrf_id_t vrf_id) | |
576 | { | |
577 | void *gate = NULL; | |
578 | struct interface *ifp = NULL; | |
579 | int index = 0; | |
580 | /* MPLS labels */ | |
581 | mpls_label_t labels[MPLS_MAX_LABELS] = {0}; | |
582 | int num_labels = 0; | |
b9596f13 | 583 | enum seg6local_action_t seg6l_act = ZEBRA_SEG6_LOCAL_ACTION_UNSPEC; |
1bda3e62 HS |
584 | struct seg6local_context seg6l_ctx = {}; |
585 | struct in6_addr seg6_segs = {}; | |
f16de90b | 586 | int num_segs = 0; |
20822f9d SW |
587 | struct rtattr *rtnh_tb[RTA_MAX + 1] = {}; |
588 | ||
589 | int len = RTA_PAYLOAD(tb[RTA_MULTIPATH]); | |
590 | vrf_id_t nh_vrf_id = vrf_id; | |
591 | ||
20822f9d SW |
592 | for (;;) { |
593 | struct nexthop *nh = NULL; | |
594 | ||
595 | if (len < (int)sizeof(*rtnh) || rtnh->rtnh_len > len) | |
596 | break; | |
597 | ||
598 | index = rtnh->rtnh_ifindex; | |
599 | if (index) { | |
600 | /* | |
601 | * Yes we are looking this up | |
602 | * for every nexthop and just | |
603 | * using the last one looked | |
604 | * up right now | |
605 | */ | |
606 | ifp = if_lookup_by_index_per_ns(zebra_ns_lookup(ns_id), | |
607 | index); | |
608 | if (ifp) | |
096f7609 | 609 | nh_vrf_id = ifp->vrf->vrf_id; |
20822f9d SW |
610 | else { |
611 | flog_warn( | |
612 | EC_ZEBRA_UNKNOWN_INTERFACE, | |
613 | "%s: Unknown interface %u specified, defaulting to VRF_DEFAULT", | |
15569c58 | 614 | __func__, index); |
20822f9d SW |
615 | nh_vrf_id = VRF_DEFAULT; |
616 | } | |
617 | } else | |
618 | nh_vrf_id = vrf_id; | |
619 | ||
620 | if (rtnh->rtnh_len > sizeof(*rtnh)) { | |
20822f9d SW |
621 | netlink_parse_rtattr(rtnh_tb, RTA_MAX, RTNH_DATA(rtnh), |
622 | rtnh->rtnh_len - sizeof(*rtnh)); | |
623 | if (rtnh_tb[RTA_GATEWAY]) | |
624 | gate = RTA_DATA(rtnh_tb[RTA_GATEWAY]); | |
625 | if (rtnh_tb[RTA_ENCAP] && rtnh_tb[RTA_ENCAP_TYPE] | |
626 | && *(uint16_t *)RTA_DATA(rtnh_tb[RTA_ENCAP_TYPE]) | |
627 | == LWTUNNEL_ENCAP_MPLS) { | |
628 | num_labels = parse_encap_mpls( | |
629 | rtnh_tb[RTA_ENCAP], labels); | |
630 | } | |
d49e6c4a HS |
631 | if (rtnh_tb[RTA_ENCAP] && rtnh_tb[RTA_ENCAP_TYPE] |
632 | && *(uint16_t *)RTA_DATA(rtnh_tb[RTA_ENCAP_TYPE]) | |
633 | == LWTUNNEL_ENCAP_SEG6_LOCAL) { | |
634 | seg6l_act = parse_encap_seg6local( | |
635 | rtnh_tb[RTA_ENCAP], &seg6l_ctx); | |
636 | } | |
f16de90b HS |
637 | if (rtnh_tb[RTA_ENCAP] && rtnh_tb[RTA_ENCAP_TYPE] |
638 | && *(uint16_t *)RTA_DATA(rtnh_tb[RTA_ENCAP_TYPE]) | |
639 | == LWTUNNEL_ENCAP_SEG6) { | |
640 | num_segs = parse_encap_seg6(rtnh_tb[RTA_ENCAP], | |
641 | &seg6_segs); | |
642 | } | |
20822f9d SW |
643 | } |
644 | ||
f3354e16 SW |
645 | if (gate && rtm->rtm_family == AF_INET) { |
646 | if (index) | |
0eb97b86 MS |
647 | nh = nexthop_from_ipv4_ifindex( |
648 | gate, prefsrc, index, nh_vrf_id); | |
f3354e16 | 649 | else |
0eb97b86 MS |
650 | nh = nexthop_from_ipv4(gate, prefsrc, |
651 | nh_vrf_id); | |
f3354e16 SW |
652 | } else if (gate && rtm->rtm_family == AF_INET6) { |
653 | if (index) | |
0eb97b86 MS |
654 | nh = nexthop_from_ipv6_ifindex( |
655 | gate, index, nh_vrf_id); | |
f3354e16 | 656 | else |
0eb97b86 | 657 | nh = nexthop_from_ipv6(gate, nh_vrf_id); |
20822f9d | 658 | } else |
0eb97b86 | 659 | nh = nexthop_from_ifindex(index, nh_vrf_id); |
20822f9d SW |
660 | |
661 | if (nh) { | |
df7fb580 DS |
662 | nh->weight = rtnh->rtnh_hops + 1; |
663 | ||
20822f9d SW |
664 | if (num_labels) |
665 | nexthop_add_labels(nh, ZEBRA_LSP_STATIC, | |
666 | num_labels, labels); | |
667 | ||
d49e6c4a | 668 | if (seg6l_act != ZEBRA_SEG6_LOCAL_ACTION_UNSPEC) |
eab0f8f0 HS |
669 | nexthop_add_srv6_seg6local(nh, seg6l_act, |
670 | &seg6l_ctx); | |
d49e6c4a | 671 | |
f16de90b | 672 | if (num_segs) |
eab0f8f0 | 673 | nexthop_add_srv6_seg6(nh, &seg6_segs); |
f16de90b | 674 | |
20822f9d SW |
675 | if (rtnh->rtnh_flags & RTNH_F_ONLINK) |
676 | SET_FLAG(nh->flags, NEXTHOP_FLAG_ONLINK); | |
0eb97b86 MS |
677 | |
678 | /* Add to temporary list */ | |
679 | nexthop_group_add_sorted(ng, nh); | |
20822f9d SW |
680 | } |
681 | ||
682 | if (rtnh->rtnh_len == 0) | |
683 | break; | |
684 | ||
685 | len -= NLMSG_ALIGN(rtnh->rtnh_len); | |
686 | rtnh = RTNH_NEXT(rtnh); | |
687 | } | |
688 | ||
0eb97b86 | 689 | uint8_t nhop_num = nexthop_group_nexthop_num(ng); |
20822f9d SW |
690 | |
691 | return nhop_num; | |
692 | } | |
693 | ||
718e3744 | 694 | /* Looking up routing table by netlink interface. */ |
2414abd3 | 695 | static int netlink_route_change_read_unicast(struct nlmsghdr *h, ns_id_t ns_id, |
d62a17ae | 696 | int startup) |
718e3744 | 697 | { |
d62a17ae | 698 | int len; |
699 | struct rtmsg *rtm; | |
700 | struct rtattr *tb[RTA_MAX + 1]; | |
acde7f6b | 701 | uint32_t flags = 0; |
d62a17ae | 702 | struct prefix p; |
792fa92e | 703 | struct prefix_ipv6 src_p = {}; |
78dd30b2 | 704 | vrf_id_t vrf_id; |
6a6d11a3 | 705 | bool selfroute; |
d62a17ae | 706 | |
707 | char anyaddr[16] = {0}; | |
708 | ||
915902cb | 709 | int proto = ZEBRA_ROUTE_KERNEL; |
d62a17ae | 710 | int index = 0; |
711 | int table; | |
712 | int metric = 0; | |
d7c0a89a | 713 | uint32_t mtu = 0; |
25715c7e | 714 | uint8_t distance = 0; |
4e40b6d6 | 715 | route_tag_t tag = 0; |
fcc89a9c | 716 | uint32_t nhe_id = 0; |
d62a17ae | 717 | |
718 | void *dest = NULL; | |
719 | void *gate = NULL; | |
720 | void *prefsrc = NULL; /* IPv4 preferred source host address */ | |
721 | void *src = NULL; /* IPv6 srcdest source prefix */ | |
e655a03c | 722 | enum blackhole_type bh_type = BLACKHOLE_UNSPEC; |
d62a17ae | 723 | |
3cee2135 DS |
724 | frrtrace(3, frr_zebra, netlink_route_change_read_unicast, h, ns_id, |
725 | startup); | |
726 | ||
d62a17ae | 727 | rtm = NLMSG_DATA(h); |
728 | ||
729 | if (startup && h->nlmsg_type != RTM_NEWROUTE) | |
730 | return 0; | |
e655a03c DL |
731 | switch (rtm->rtm_type) { |
732 | case RTN_UNICAST: | |
733 | break; | |
734 | case RTN_BLACKHOLE: | |
735 | bh_type = BLACKHOLE_NULL; | |
736 | break; | |
737 | case RTN_UNREACHABLE: | |
738 | bh_type = BLACKHOLE_REJECT; | |
739 | break; | |
740 | case RTN_PROHIBIT: | |
741 | bh_type = BLACKHOLE_ADMINPROHIB; | |
742 | break; | |
743 | default: | |
8c8f250b DS |
744 | if (IS_ZEBRA_DEBUG_KERNEL) |
745 | zlog_debug("Route rtm_type: %s(%d) intentionally ignoring", | |
746 | nl_rttype_to_str(rtm->rtm_type), | |
747 | rtm->rtm_type); | |
d62a17ae | 748 | return 0; |
e655a03c | 749 | } |
d62a17ae | 750 | |
751 | len = h->nlmsg_len - NLMSG_LENGTH(sizeof(struct rtmsg)); | |
9bdf8618 | 752 | if (len < 0) { |
15569c58 DA |
753 | zlog_err( |
754 | "%s: Message received from netlink is of a broken size %d %zu", | |
755 | __func__, h->nlmsg_len, | |
756 | (size_t)NLMSG_LENGTH(sizeof(struct rtmsg))); | |
d62a17ae | 757 | return -1; |
9bdf8618 | 758 | } |
d62a17ae | 759 | |
d62a17ae | 760 | netlink_parse_rtattr(tb, RTA_MAX, RTM_RTA(rtm), len); |
761 | ||
762 | if (rtm->rtm_flags & RTM_F_CLONED) | |
763 | return 0; | |
764 | if (rtm->rtm_protocol == RTPROT_REDIRECT) | |
765 | return 0; | |
766 | if (rtm->rtm_protocol == RTPROT_KERNEL) | |
767 | return 0; | |
768 | ||
6a6d11a3 NN |
769 | selfroute = is_selfroute(rtm->rtm_protocol); |
770 | ||
e4876266 DS |
771 | if (!startup && selfroute |
772 | && h->nlmsg_type == RTM_NEWROUTE | |
773 | && !zrouter.asic_offloaded) { | |
6ab5222f DS |
774 | if (IS_ZEBRA_DEBUG_KERNEL) |
775 | zlog_debug("Route type: %d Received that we think we have originated, ignoring", | |
776 | rtm->rtm_protocol); | |
d62a17ae | 777 | return 0; |
6ab5222f | 778 | } |
d62a17ae | 779 | |
780 | /* We don't care about change notifications for the MPLS table. */ | |
781 | /* TODO: Revisit this. */ | |
782 | if (rtm->rtm_family == AF_MPLS) | |
783 | return 0; | |
784 | ||
785 | /* Table corresponding to route. */ | |
786 | if (tb[RTA_TABLE]) | |
787 | table = *(int *)RTA_DATA(tb[RTA_TABLE]); | |
788 | else | |
789 | table = rtm->rtm_table; | |
790 | ||
791 | /* Map to VRF */ | |
78dd30b2 | 792 | vrf_id = vrf_lookup_by_table(table, ns_id); |
d62a17ae | 793 | if (vrf_id == VRF_DEFAULT) { |
794 | if (!is_zebra_valid_kernel_table(table) | |
795 | && !is_zebra_main_routing_table(table)) | |
796 | return 0; | |
797 | } | |
798 | ||
5a3cf853 DS |
799 | if (rtm->rtm_flags & RTM_F_TRAP) |
800 | flags |= ZEBRA_FLAG_TRAPPED; | |
801 | if (rtm->rtm_flags & RTM_F_OFFLOAD) | |
802 | flags |= ZEBRA_FLAG_OFFLOADED; | |
0d32fbee DS |
803 | if (rtm->rtm_flags & RTM_F_OFFLOAD_FAILED) |
804 | flags |= ZEBRA_FLAG_OFFLOAD_FAILED; | |
5a3cf853 | 805 | |
a048d523 DS |
806 | if (h->nlmsg_flags & NLM_F_APPEND) |
807 | flags |= ZEBRA_FLAG_OUTOFSYNC; | |
808 | ||
d62a17ae | 809 | /* Route which inserted by Zebra. */ |
6a6d11a3 | 810 | if (selfroute) { |
d62a17ae | 811 | flags |= ZEBRA_FLAG_SELFROUTE; |
38e40db1 | 812 | proto = proto2zebra(rtm->rtm_protocol, rtm->rtm_family, false); |
915902cb | 813 | } |
d62a17ae | 814 | if (tb[RTA_OIF]) |
815 | index = *(int *)RTA_DATA(tb[RTA_OIF]); | |
816 | ||
817 | if (tb[RTA_DST]) | |
818 | dest = RTA_DATA(tb[RTA_DST]); | |
819 | else | |
820 | dest = anyaddr; | |
821 | ||
822 | if (tb[RTA_SRC]) | |
823 | src = RTA_DATA(tb[RTA_SRC]); | |
824 | else | |
825 | src = anyaddr; | |
826 | ||
827 | if (tb[RTA_PREFSRC]) | |
828 | prefsrc = RTA_DATA(tb[RTA_PREFSRC]); | |
829 | ||
830 | if (tb[RTA_GATEWAY]) | |
831 | gate = RTA_DATA(tb[RTA_GATEWAY]); | |
832 | ||
fcc89a9c SW |
833 | if (tb[RTA_NH_ID]) |
834 | nhe_id = *(uint32_t *)RTA_DATA(tb[RTA_NH_ID]); | |
835 | ||
f19435a8 DS |
836 | if (tb[RTA_PRIORITY]) |
837 | metric = *(int *)RTA_DATA(tb[RTA_PRIORITY]); | |
d62a17ae | 838 | |
4e40b6d6 KK |
839 | #if defined(SUPPORT_REALMS) |
840 | if (tb[RTA_FLOW]) | |
841 | tag = *(uint32_t *)RTA_DATA(tb[RTA_FLOW]); | |
842 | #endif | |
843 | ||
f19435a8 DS |
844 | if (tb[RTA_METRICS]) { |
845 | struct rtattr *mxrta[RTAX_MAX + 1]; | |
d62a17ae | 846 | |
996c9314 | 847 | netlink_parse_rtattr(mxrta, RTAX_MAX, RTA_DATA(tb[RTA_METRICS]), |
f19435a8 | 848 | RTA_PAYLOAD(tb[RTA_METRICS])); |
d62a17ae | 849 | |
f19435a8 | 850 | if (mxrta[RTAX_MTU]) |
d7c0a89a | 851 | mtu = *(uint32_t *)RTA_DATA(mxrta[RTAX_MTU]); |
d62a17ae | 852 | } |
853 | ||
854 | if (rtm->rtm_family == AF_INET) { | |
855 | p.family = AF_INET; | |
930571d2 | 856 | if (rtm->rtm_dst_len > IPV4_MAX_BITLEN) { |
e17d9b2d | 857 | zlog_err( |
75829703 | 858 | "Invalid destination prefix length: %u received from kernel route change", |
930571d2 | 859 | rtm->rtm_dst_len); |
e17d9b2d | 860 | return -1; |
930571d2 | 861 | } |
d62a17ae | 862 | memcpy(&p.u.prefix4, dest, 4); |
863 | p.prefixlen = rtm->rtm_dst_len; | |
864 | ||
1f610a1f | 865 | if (rtm->rtm_src_len != 0) { |
9df414fe | 866 | flog_warn( |
e914ccbe | 867 | EC_ZEBRA_UNSUPPORTED_V4_SRCDEST, |
2dbe669b DA |
868 | "unsupported IPv4 sourcedest route (dest %pFX vrf %u)", |
869 | &p, vrf_id); | |
1f610a1f CF |
870 | return 0; |
871 | } | |
930571d2 | 872 | |
1f610a1f CF |
873 | /* Force debug below to not display anything for source */ |
874 | src_p.prefixlen = 0; | |
d62a17ae | 875 | } else if (rtm->rtm_family == AF_INET6) { |
876 | p.family = AF_INET6; | |
930571d2 | 877 | if (rtm->rtm_dst_len > IPV6_MAX_BITLEN) { |
e17d9b2d | 878 | zlog_err( |
75829703 | 879 | "Invalid destination prefix length: %u received from kernel route change", |
930571d2 | 880 | rtm->rtm_dst_len); |
e17d9b2d | 881 | return -1; |
930571d2 | 882 | } |
d62a17ae | 883 | memcpy(&p.u.prefix6, dest, 16); |
884 | p.prefixlen = rtm->rtm_dst_len; | |
885 | ||
886 | src_p.family = AF_INET6; | |
930571d2 | 887 | if (rtm->rtm_src_len > IPV6_MAX_BITLEN) { |
e17d9b2d | 888 | zlog_err( |
75829703 | 889 | "Invalid source prefix length: %u received from kernel route change", |
930571d2 | 890 | rtm->rtm_src_len); |
e17d9b2d | 891 | return -1; |
930571d2 | 892 | } |
d62a17ae | 893 | memcpy(&src_p.prefix, src, 16); |
894 | src_p.prefixlen = rtm->rtm_src_len; | |
deb28338 MS |
895 | } else { |
896 | /* We only handle the AFs we handle... */ | |
897 | if (IS_ZEBRA_DEBUG_KERNEL) | |
898 | zlog_debug("%s: unknown address-family %u", __func__, | |
899 | rtm->rtm_family); | |
900 | return 0; | |
d62a17ae | 901 | } |
902 | ||
25715c7e DS |
903 | /* |
904 | * For ZEBRA_ROUTE_KERNEL types: | |
905 | * | |
906 | * The metric/priority of the route received from the kernel | |
907 | * is a 32 bit number. We are going to interpret the high | |
908 | * order byte as the Admin Distance and the low order 3 bytes | |
909 | * as the metric. | |
910 | * | |
911 | * This will allow us to do two things: | |
912 | * 1) Allow the creation of kernel routes that can be | |
913 | * overridden by zebra. | |
914 | * 2) Allow the old behavior for 'most' kernel route types | |
915 | * if a user enters 'ip route ...' v4 routes get a metric | |
916 | * of 0 and v6 routes get a metric of 1024. Both of these | |
917 | * values will end up with a admin distance of 0, which | |
918 | * will cause them to win for the purposes of zebra. | |
919 | */ | |
920 | if (proto == ZEBRA_ROUTE_KERNEL) { | |
921 | distance = (metric >> 24) & 0xFF; | |
996c9314 | 922 | metric = (metric & 0x00FFFFFF); |
25715c7e DS |
923 | } |
924 | ||
d62a17ae | 925 | if (IS_ZEBRA_DEBUG_KERNEL) { |
d62a17ae | 926 | char buf2[PREFIX_STRLEN]; |
2dbe669b | 927 | |
bd47f3a3 | 928 | zlog_debug( |
2dbe669b DA |
929 | "%s %pFX%s%s vrf %s(%u) table_id: %u metric: %d Admin Distance: %d", |
930 | nl_msg_type_to_str(h->nlmsg_type), &p, | |
bd47f3a3 JU |
931 | src_p.prefixlen ? " from " : "", |
932 | src_p.prefixlen ? prefix2str(&src_p, buf2, sizeof(buf2)) | |
933 | : "", | |
934 | vrf_id_to_name(vrf_id), vrf_id, table, metric, | |
935 | distance); | |
d62a17ae | 936 | } |
937 | ||
938 | afi_t afi = AFI_IP; | |
939 | if (rtm->rtm_family == AF_INET6) | |
940 | afi = AFI_IP6; | |
941 | ||
942 | if (h->nlmsg_type == RTM_NEWROUTE) { | |
07fd1f7e DS |
943 | struct route_entry *re; |
944 | struct nexthop_group *ng = NULL; | |
945 | ||
946 | re = zebra_rib_route_entry_new(vrf_id, proto, 0, flags, nhe_id, | |
947 | table, metric, mtu, distance, | |
948 | tag); | |
949 | if (!nhe_id) | |
950 | ng = nexthop_group_new(); | |
8795f904 | 951 | |
fd36be7e | 952 | if (!tb[RTA_MULTIPATH]) { |
07fd1f7e | 953 | struct nexthop *nexthop, nh; |
8795f904 | 954 | |
77a44d94 SW |
955 | if (!nhe_id) { |
956 | nh = parse_nexthop_unicast( | |
957 | ns_id, rtm, tb, bh_type, index, prefsrc, | |
20822f9d | 958 | gate, afi, vrf_id); |
07fd1f7e DS |
959 | |
960 | nexthop = nexthop_new(); | |
961 | *nexthop = nh; | |
962 | nexthop_group_add_sorted(ng, nexthop); | |
87da6a60 | 963 | } |
fd36be7e | 964 | } else { |
d62a17ae | 965 | /* This is a multipath route */ |
d62a17ae | 966 | struct rtnexthop *rtnh = |
967 | (struct rtnexthop *)RTA_DATA(tb[RTA_MULTIPATH]); | |
d62a17ae | 968 | |
20822f9d | 969 | if (!nhe_id) { |
0eb97b86 MS |
970 | uint8_t nhop_num; |
971 | ||
972 | /* Use temporary list of nexthops; parse | |
973 | * message payload's nexthops. | |
974 | */ | |
0eb97b86 | 975 | nhop_num = |
20822f9d | 976 | parse_multipath_nexthops_unicast( |
0eb97b86 | 977 | ns_id, ng, rtm, rtnh, tb, |
20822f9d SW |
978 | prefsrc, vrf_id); |
979 | ||
980 | zserv_nexthop_num_warn( | |
981 | __func__, (const struct prefix *)&p, | |
982 | nhop_num); | |
0eb97b86 MS |
983 | |
984 | if (nhop_num == 0) { | |
985 | nexthop_group_delete(&ng); | |
986 | ng = NULL; | |
987 | } | |
d62a17ae | 988 | } |
07fd1f7e DS |
989 | } |
990 | if (nhe_id || ng) | |
991 | rib_add_multipath(afi, SAFI_UNICAST, &p, &src_p, re, ng, | |
992 | startup); | |
993 | else { | |
994 | /* | |
995 | * I really don't see how this is possible | |
996 | * but since we are testing for it let's | |
997 | * let the end user know why the route | |
998 | * that was just received was swallowed | |
999 | * up and forgotten | |
1000 | */ | |
1001 | zlog_err( | |
1002 | "%s: %pFX multipath RTM_NEWROUTE has a invalid nexthop group from the kernel", | |
1003 | __func__, &p); | |
1004 | XFREE(MTYPE_RE, re); | |
d62a17ae | 1005 | } |
1006 | } else { | |
bc541126 SW |
1007 | if (nhe_id) { |
1008 | rib_delete(afi, SAFI_UNICAST, vrf_id, proto, 0, flags, | |
1009 | &p, &src_p, NULL, nhe_id, table, metric, | |
3ceae22b | 1010 | distance, true); |
bc541126 SW |
1011 | } else { |
1012 | if (!tb[RTA_MULTIPATH]) { | |
1013 | struct nexthop nh; | |
760f39dc HS |
1014 | |
1015 | nh = parse_nexthop_unicast( | |
1016 | ns_id, rtm, tb, bh_type, index, prefsrc, | |
1017 | gate, afi, vrf_id); | |
bc541126 SW |
1018 | rib_delete(afi, SAFI_UNICAST, vrf_id, proto, 0, |
1019 | flags, &p, &src_p, &nh, 0, table, | |
3ceae22b | 1020 | metric, distance, true); |
8ba5bd58 | 1021 | } else { |
bc541126 SW |
1022 | /* XXX: need to compare the entire list of |
1023 | * nexthops here for NLM_F_APPEND stupidity */ | |
1024 | rib_delete(afi, SAFI_UNICAST, vrf_id, proto, 0, | |
1025 | flags, &p, &src_p, NULL, 0, table, | |
3ceae22b | 1026 | metric, distance, true); |
8ba5bd58 | 1027 | } |
d62a17ae | 1028 | } |
1029 | } | |
1030 | ||
1031 | return 0; | |
718e3744 | 1032 | } |
1033 | ||
e3be0432 DS |
1034 | static struct mcast_route_data *mroute = NULL; |
1035 | ||
2414abd3 | 1036 | static int netlink_route_change_read_multicast(struct nlmsghdr *h, |
d62a17ae | 1037 | ns_id_t ns_id, int startup) |
565fdc75 | 1038 | { |
d62a17ae | 1039 | int len; |
1040 | struct rtmsg *rtm; | |
1041 | struct rtattr *tb[RTA_MAX + 1]; | |
1042 | struct mcast_route_data *m; | |
d62a17ae | 1043 | int iif = 0; |
1044 | int count; | |
1045 | int oif[256]; | |
1046 | int oif_count = 0; | |
d62a17ae | 1047 | char oif_list[256] = "\0"; |
78dd30b2 | 1048 | vrf_id_t vrf; |
43b5cc5e | 1049 | int table; |
d62a17ae | 1050 | |
afeb8524 DL |
1051 | assert(mroute); |
1052 | m = mroute; | |
d62a17ae | 1053 | |
1054 | rtm = NLMSG_DATA(h); | |
1055 | ||
1056 | len = h->nlmsg_len - NLMSG_LENGTH(sizeof(struct rtmsg)); | |
1057 | ||
d62a17ae | 1058 | netlink_parse_rtattr(tb, RTA_MAX, RTM_RTA(rtm), len); |
90d82769 | 1059 | |
43b5cc5e DS |
1060 | if (tb[RTA_TABLE]) |
1061 | table = *(int *)RTA_DATA(tb[RTA_TABLE]); | |
1062 | else | |
1063 | table = rtm->rtm_table; | |
1064 | ||
78dd30b2 | 1065 | vrf = vrf_lookup_by_table(table, ns_id); |
43b5cc5e | 1066 | |
d62a17ae | 1067 | if (tb[RTA_IIF]) |
1068 | iif = *(int *)RTA_DATA(tb[RTA_IIF]); | |
1069 | ||
4d3b4b18 MR |
1070 | if (tb[RTA_SRC]) { |
1071 | if (rtm->rtm_family == RTNL_FAMILY_IPMR) | |
1072 | m->src.ipaddr_v4 = | |
1073 | *(struct in_addr *)RTA_DATA(tb[RTA_SRC]); | |
1074 | else | |
1075 | m->src.ipaddr_v6 = | |
1076 | *(struct in6_addr *)RTA_DATA(tb[RTA_SRC]); | |
1077 | } | |
d62a17ae | 1078 | |
4d3b4b18 MR |
1079 | if (tb[RTA_DST]) { |
1080 | if (rtm->rtm_family == RTNL_FAMILY_IPMR) | |
1081 | m->grp.ipaddr_v4 = | |
1082 | *(struct in_addr *)RTA_DATA(tb[RTA_DST]); | |
1083 | else | |
1084 | m->grp.ipaddr_v6 = | |
1085 | *(struct in6_addr *)RTA_DATA(tb[RTA_DST]); | |
1086 | } | |
d62a17ae | 1087 | |
62819462 | 1088 | if (tb[RTA_EXPIRES]) |
d62a17ae | 1089 | m->lastused = *(unsigned long long *)RTA_DATA(tb[RTA_EXPIRES]); |
1090 | ||
1091 | if (tb[RTA_MULTIPATH]) { | |
1092 | struct rtnexthop *rtnh = | |
1093 | (struct rtnexthop *)RTA_DATA(tb[RTA_MULTIPATH]); | |
1094 | ||
1095 | len = RTA_PAYLOAD(tb[RTA_MULTIPATH]); | |
1096 | for (;;) { | |
1097 | if (len < (int)sizeof(*rtnh) || rtnh->rtnh_len > len) | |
1098 | break; | |
1099 | ||
1100 | oif[oif_count] = rtnh->rtnh_ifindex; | |
1101 | oif_count++; | |
1102 | ||
3c04071d SW |
1103 | if (rtnh->rtnh_len == 0) |
1104 | break; | |
1105 | ||
d62a17ae | 1106 | len -= NLMSG_ALIGN(rtnh->rtnh_len); |
1107 | rtnh = RTNH_NEXT(rtnh); | |
1108 | } | |
1109 | } | |
1110 | ||
4d3b4b18 MR |
1111 | if (rtm->rtm_family == RTNL_FAMILY_IPMR) { |
1112 | SET_IPADDR_V4(&m->src); | |
1113 | SET_IPADDR_V4(&m->grp); | |
1114 | } else if (rtm->rtm_family == RTNL_FAMILY_IP6MR) { | |
1115 | SET_IPADDR_V6(&m->src); | |
1116 | SET_IPADDR_V6(&m->grp); | |
1117 | } else { | |
1118 | zlog_warn("%s: Invalid rtm_family received", __func__); | |
1119 | return 0; | |
1120 | } | |
1121 | ||
d62a17ae | 1122 | if (IS_ZEBRA_DEBUG_KERNEL) { |
822c9af2 SW |
1123 | struct interface *ifp = NULL; |
1124 | struct zebra_vrf *zvrf = NULL; | |
1125 | ||
d62a17ae | 1126 | for (count = 0; count < oif_count; count++) { |
1127 | ifp = if_lookup_by_index(oif[count], vrf); | |
1128 | char temp[256]; | |
1129 | ||
772270f3 QY |
1130 | snprintf(temp, sizeof(temp), "%s(%d) ", |
1131 | ifp ? ifp->name : "Unknown", oif[count]); | |
eab4a5c2 | 1132 | strlcat(oif_list, temp, sizeof(oif_list)); |
d62a17ae | 1133 | } |
822c9af2 | 1134 | zvrf = zebra_vrf_lookup_by_id(vrf); |
d62a17ae | 1135 | ifp = if_lookup_by_index(iif, vrf); |
822c9af2 | 1136 | zlog_debug( |
4d3b4b18 | 1137 | "MCAST VRF: %s(%d) %s (%pIA,%pIA) IIF: %s(%d) OIF: %s jiffies: %lld", |
bd47f3a3 | 1138 | zvrf_name(zvrf), vrf, nl_msg_type_to_str(h->nlmsg_type), |
4d3b4b18 MR |
1139 | &m->src, &m->grp, ifp ? ifp->name : "Unknown", iif, |
1140 | oif_list, m->lastused); | |
90d82769 | 1141 | } |
d62a17ae | 1142 | return 0; |
565fdc75 DS |
1143 | } |
1144 | ||
2414abd3 | 1145 | int netlink_route_change(struct nlmsghdr *h, ns_id_t ns_id, int startup) |
565fdc75 | 1146 | { |
d62a17ae | 1147 | int len; |
d62a17ae | 1148 | struct rtmsg *rtm; |
1149 | ||
1150 | rtm = NLMSG_DATA(h); | |
1151 | ||
1152 | if (!(h->nlmsg_type == RTM_NEWROUTE || h->nlmsg_type == RTM_DELROUTE)) { | |
1153 | /* If this is not route add/delete message print warning. */ | |
9165c5f5 | 1154 | zlog_debug("Kernel message: %s NS %u", |
87b5d1b0 | 1155 | nl_msg_type_to_str(h->nlmsg_type), ns_id); |
d62a17ae | 1156 | return 0; |
1157 | } | |
1158 | ||
afeb8524 DL |
1159 | switch (rtm->rtm_family) { |
1160 | case AF_INET: | |
1161 | case AF_INET6: | |
1162 | break; | |
1163 | ||
1164 | case RTNL_FAMILY_IPMR: | |
1165 | case RTNL_FAMILY_IP6MR: | |
1166 | /* notifications on IPMR are irrelevant to zebra, we only care | |
1167 | * about responses to RTM_GETROUTE requests we sent. | |
1168 | */ | |
1169 | return 0; | |
1170 | ||
1171 | default: | |
9df414fe | 1172 | flog_warn( |
e914ccbe | 1173 | EC_ZEBRA_UNKNOWN_FAMILY, |
87b5d1b0 DS |
1174 | "Invalid address family: %u received from kernel route change: %s", |
1175 | rtm->rtm_family, nl_msg_type_to_str(h->nlmsg_type)); | |
8a1b681c SW |
1176 | return 0; |
1177 | } | |
1178 | ||
d62a17ae | 1179 | /* Connected route. */ |
1180 | if (IS_ZEBRA_DEBUG_KERNEL) | |
78dd30b2 | 1181 | zlog_debug("%s %s %s proto %s NS %u", |
d62a17ae | 1182 | nl_msg_type_to_str(h->nlmsg_type), |
1183 | nl_family_to_str(rtm->rtm_family), | |
1184 | nl_rttype_to_str(rtm->rtm_type), | |
78dd30b2 | 1185 | nl_rtproto_to_str(rtm->rtm_protocol), ns_id); |
d62a17ae | 1186 | |
d62a17ae | 1187 | |
1188 | len = h->nlmsg_len - NLMSG_LENGTH(sizeof(struct rtmsg)); | |
9bdf8618 | 1189 | if (len < 0) { |
15569c58 DA |
1190 | zlog_err( |
1191 | "%s: Message received from netlink is of a broken size: %d %zu", | |
1192 | __func__, h->nlmsg_len, | |
1193 | (size_t)NLMSG_LENGTH(sizeof(struct rtmsg))); | |
d62a17ae | 1194 | return -1; |
9bdf8618 | 1195 | } |
d62a17ae | 1196 | |
afeb8524 DL |
1197 | /* these are "magic" kernel-managed *unicast* routes used for |
1198 | * outputting locally generated multicast traffic (which uses unicast | |
1199 | * handling on Linux because ~reasons~. | |
1200 | */ | |
e655a03c | 1201 | if (rtm->rtm_type == RTN_MULTICAST) |
afeb8524 DL |
1202 | return 0; |
1203 | ||
1204 | netlink_route_change_read_unicast(h, ns_id, startup); | |
d62a17ae | 1205 | return 0; |
565fdc75 DS |
1206 | } |
1207 | ||
289602d7 | 1208 | /* Request for specific route information from the kernel */ |
d62a17ae | 1209 | static int netlink_request_route(struct zebra_ns *zns, int family, int type) |
289602d7 | 1210 | { |
d62a17ae | 1211 | struct { |
1212 | struct nlmsghdr n; | |
1213 | struct rtmsg rtm; | |
1214 | } req; | |
1215 | ||
1216 | /* Form the request, specifying filter (rtattr) if needed. */ | |
1217 | memset(&req, 0, sizeof(req)); | |
1218 | req.n.nlmsg_type = type; | |
718f9b0f | 1219 | req.n.nlmsg_flags = NLM_F_ROOT | NLM_F_MATCH | NLM_F_REQUEST; |
d62a17ae | 1220 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)); |
1221 | req.rtm.rtm_family = family; | |
1222 | ||
fd3f8e52 | 1223 | return netlink_request(&zns->netlink_cmd, &req); |
289602d7 | 1224 | } |
1225 | ||
718e3744 | 1226 | /* Routing table read function using netlink interface. Only called |
1227 | bootstrap time. */ | |
d62a17ae | 1228 | int netlink_route_read(struct zebra_ns *zns) |
718e3744 | 1229 | { |
d62a17ae | 1230 | int ret; |
85a75f1e MS |
1231 | struct zebra_dplane_info dp_info; |
1232 | ||
1233 | zebra_dplane_info_from_zns(&dp_info, zns, true /*is_cmd*/); | |
d62a17ae | 1234 | |
1235 | /* Get IPv4 routing table. */ | |
1236 | ret = netlink_request_route(zns, AF_INET, RTM_GETROUTE); | |
1237 | if (ret < 0) | |
1238 | return ret; | |
1239 | ret = netlink_parse_info(netlink_route_change_read_unicast, | |
9bfadae8 | 1240 | &zns->netlink_cmd, &dp_info, 0, true); |
d62a17ae | 1241 | if (ret < 0) |
1242 | return ret; | |
1243 | ||
1244 | /* Get IPv6 routing table. */ | |
1245 | ret = netlink_request_route(zns, AF_INET6, RTM_GETROUTE); | |
1246 | if (ret < 0) | |
1247 | return ret; | |
1248 | ret = netlink_parse_info(netlink_route_change_read_unicast, | |
9bfadae8 | 1249 | &zns->netlink_cmd, &dp_info, 0, true); |
d62a17ae | 1250 | if (ret < 0) |
1251 | return ret; | |
1252 | ||
1253 | return 0; | |
718e3744 | 1254 | } |
1255 | ||
0be6e7d7 JU |
1256 | /* |
1257 | * The function returns true if the gateway info could be added | |
1258 | * to the message, otherwise false is returned. | |
1259 | */ | |
1260 | static bool _netlink_route_add_gateway_info(uint8_t route_family, | |
312a6bee JU |
1261 | uint8_t gw_family, |
1262 | struct nlmsghdr *nlmsg, | |
1263 | size_t req_size, int bytelen, | |
1264 | const struct nexthop *nexthop) | |
40c7bdb0 | 1265 | { |
d62a17ae | 1266 | if (route_family == AF_MPLS) { |
1267 | struct gw_family_t gw_fam; | |
1268 | ||
1269 | gw_fam.family = gw_family; | |
1270 | if (gw_family == AF_INET) | |
1271 | memcpy(&gw_fam.gate.ipv4, &nexthop->gate.ipv4, bytelen); | |
1272 | else | |
1273 | memcpy(&gw_fam.gate.ipv6, &nexthop->gate.ipv6, bytelen); | |
0be6e7d7 JU |
1274 | if (!nl_attr_put(nlmsg, req_size, RTA_VIA, &gw_fam.family, |
1275 | bytelen + 2)) | |
1276 | return false; | |
d62a17ae | 1277 | } else { |
92d6f769 K |
1278 | if (!(nexthop->rparent |
1279 | && IS_MAPPED_IPV6(&nexthop->rparent->gate.ipv6))) { | |
1280 | if (gw_family == AF_INET) { | |
1281 | if (!nl_attr_put(nlmsg, req_size, RTA_GATEWAY, | |
1282 | &nexthop->gate.ipv4, bytelen)) | |
1283 | return false; | |
1284 | } else { | |
1285 | if (!nl_attr_put(nlmsg, req_size, RTA_GATEWAY, | |
1286 | &nexthop->gate.ipv6, bytelen)) | |
1287 | return false; | |
1288 | } | |
0be6e7d7 | 1289 | } |
d62a17ae | 1290 | } |
0be6e7d7 JU |
1291 | |
1292 | return true; | |
40c7bdb0 | 1293 | } |
1294 | ||
b7537db6 SW |
1295 | static int build_label_stack(struct mpls_label_stack *nh_label, |
1296 | mpls_lse_t *out_lse, char *label_buf, | |
1297 | size_t label_buf_size) | |
1298 | { | |
1299 | char label_buf1[20]; | |
1300 | int num_labels = 0; | |
1301 | ||
1302 | for (int i = 0; nh_label && i < nh_label->num_labels; i++) { | |
1303 | if (nh_label->label[i] == MPLS_LABEL_IMPLICIT_NULL) | |
1304 | continue; | |
1305 | ||
1306 | if (IS_ZEBRA_DEBUG_KERNEL) { | |
1307 | if (!num_labels) | |
7533cad7 QY |
1308 | snprintf(label_buf, label_buf_size, "label %u", |
1309 | nh_label->label[i]); | |
b7537db6 | 1310 | else { |
772270f3 QY |
1311 | snprintf(label_buf1, sizeof(label_buf1), "/%u", |
1312 | nh_label->label[i]); | |
b7537db6 SW |
1313 | strlcat(label_buf, label_buf1, label_buf_size); |
1314 | } | |
1315 | } | |
1316 | ||
1317 | out_lse[num_labels] = | |
1318 | mpls_lse_encode(nh_label->label[i], 0, 0, 0); | |
1319 | num_labels++; | |
1320 | } | |
1321 | ||
1322 | return num_labels; | |
1323 | } | |
1324 | ||
a757997c JU |
1325 | static bool _netlink_route_encode_label_info(struct mpls_label_stack *nh_label, |
1326 | struct nlmsghdr *nlmsg, | |
1327 | size_t buflen, struct rtmsg *rtmsg, | |
1328 | char *label_buf, | |
1329 | size_t label_buf_size) | |
fa713d9e | 1330 | { |
d62a17ae | 1331 | mpls_lse_t out_lse[MPLS_MAX_LABELS]; |
a757997c | 1332 | int num_labels; |
bd47f3a3 | 1333 | |
d62a17ae | 1334 | /* |
1335 | * label_buf is *only* currently used within debugging. | |
1336 | * As such when we assign it we are guarding it inside | |
1337 | * a debug test. If you want to change this make sure | |
1338 | * you fix this assumption | |
1339 | */ | |
1340 | label_buf[0] = '\0'; | |
d62a17ae | 1341 | |
a757997c JU |
1342 | num_labels = |
1343 | build_label_stack(nh_label, out_lse, label_buf, label_buf_size); | |
fa712963 RW |
1344 | |
1345 | if (num_labels) { | |
1346 | /* Set the BoS bit */ | |
1347 | out_lse[num_labels - 1] |= htonl(1 << MPLS_LS_S_SHIFT); | |
1348 | ||
0be6e7d7 | 1349 | if (rtmsg->rtm_family == AF_MPLS) { |
a757997c | 1350 | if (!nl_attr_put(nlmsg, buflen, RTA_NEWDST, &out_lse, |
0be6e7d7 JU |
1351 | num_labels * sizeof(mpls_lse_t))) |
1352 | return false; | |
1353 | } else { | |
fa712963 | 1354 | struct rtattr *nest; |
fa712963 | 1355 | |
a757997c JU |
1356 | if (!nl_attr_put16(nlmsg, buflen, RTA_ENCAP_TYPE, |
1357 | LWTUNNEL_ENCAP_MPLS)) | |
0be6e7d7 JU |
1358 | return false; |
1359 | ||
a757997c | 1360 | nest = nl_attr_nest(nlmsg, buflen, RTA_ENCAP); |
0be6e7d7 JU |
1361 | if (!nest) |
1362 | return false; | |
1363 | ||
a757997c | 1364 | if (!nl_attr_put(nlmsg, buflen, MPLS_IPTUNNEL_DST, |
0be6e7d7 JU |
1365 | &out_lse, |
1366 | num_labels * sizeof(mpls_lse_t))) | |
1367 | return false; | |
312a6bee | 1368 | nl_attr_nest_end(nlmsg, nest); |
66d42727 | 1369 | } |
0aabccc0 | 1370 | } |
fa713d9e | 1371 | |
a757997c JU |
1372 | return true; |
1373 | } | |
1374 | ||
1375 | static bool _netlink_route_encode_nexthop_src(const struct nexthop *nexthop, | |
1376 | int family, | |
1377 | struct nlmsghdr *nlmsg, | |
1378 | size_t buflen, int bytelen) | |
1379 | { | |
1380 | if (family == AF_INET) { | |
1381 | if (nexthop->rmap_src.ipv4.s_addr != INADDR_ANY) { | |
1382 | if (!nl_attr_put(nlmsg, buflen, RTA_PREFSRC, | |
1383 | &nexthop->rmap_src.ipv4, bytelen)) | |
1384 | return false; | |
1385 | } else if (nexthop->src.ipv4.s_addr != INADDR_ANY) { | |
1386 | if (!nl_attr_put(nlmsg, buflen, RTA_PREFSRC, | |
1387 | &nexthop->src.ipv4, bytelen)) | |
1388 | return false; | |
1389 | } | |
1390 | } else if (family == AF_INET6) { | |
1391 | if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->rmap_src.ipv6)) { | |
1392 | if (!nl_attr_put(nlmsg, buflen, RTA_PREFSRC, | |
1393 | &nexthop->rmap_src.ipv6, bytelen)) | |
1394 | return false; | |
1395 | } else if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->src.ipv6)) { | |
1396 | if (!nl_attr_put(nlmsg, buflen, RTA_PREFSRC, | |
1397 | &nexthop->src.ipv6, bytelen)) | |
1398 | return false; | |
1399 | } | |
1400 | } | |
1401 | ||
1402 | return true; | |
1403 | } | |
1404 | ||
f463eac7 HS |
1405 | static ssize_t fill_seg6ipt_encap(char *buffer, size_t buflen, |
1406 | const struct in6_addr *seg) | |
76fb7ae4 HS |
1407 | { |
1408 | struct seg6_iptunnel_encap *ipt; | |
1409 | struct ipv6_sr_hdr *srh; | |
1410 | const size_t srhlen = 24; | |
4df9d859 | 1411 | |
f463eac7 HS |
1412 | /* |
1413 | * Caution: Support only SINGLE-SID, not MULTI-SID | |
1414 | * This function only supports the case where segs represents | |
1415 | * a single SID. If you want to extend the SRv6 functionality, | |
1416 | * you should improve the Boundary Check. | |
1417 | * Ex. In case of set a SID-List include multiple-SIDs as an | |
1418 | * argument of the Transit Behavior, we must support variable | |
1419 | * boundary check for buflen. | |
1420 | */ | |
1421 | if (buflen < (sizeof(struct seg6_iptunnel_encap) + | |
1422 | sizeof(struct ipv6_sr_hdr) + 16)) | |
1423 | return -1; | |
1424 | ||
76fb7ae4 HS |
1425 | memset(buffer, 0, buflen); |
1426 | ||
1427 | ipt = (struct seg6_iptunnel_encap *)buffer; | |
1428 | ipt->mode = SEG6_IPTUN_MODE_ENCAP; | |
1429 | srh = ipt->srh; | |
1430 | srh->hdrlen = (srhlen >> 3) - 1; | |
1431 | srh->type = 4; | |
1432 | srh->segments_left = 0; | |
1433 | srh->first_segment = 0; | |
1434 | memcpy(&srh->segments[0], seg, sizeof(struct in6_addr)); | |
1435 | ||
1436 | return srhlen + 4; | |
1437 | } | |
1438 | ||
a757997c JU |
1439 | /* This function takes a nexthop as argument and adds |
1440 | * the appropriate netlink attributes to an existing | |
1441 | * netlink message. | |
1442 | * | |
1443 | * @param routedesc: Human readable description of route type | |
1444 | * (direct/recursive, single-/multipath) | |
1445 | * @param bytelen: Length of addresses in bytes. | |
1446 | * @param nexthop: Nexthop information | |
1447 | * @param nlmsg: nlmsghdr structure to fill in. | |
1448 | * @param req_size: The size allocated for the message. | |
1449 | * | |
1450 | * The function returns true if the nexthop could be added | |
1451 | * to the message, otherwise false is returned. | |
1452 | */ | |
1453 | static bool _netlink_route_build_singlepath(const struct prefix *p, | |
1454 | const char *routedesc, int bytelen, | |
1455 | const struct nexthop *nexthop, | |
1456 | struct nlmsghdr *nlmsg, | |
1457 | struct rtmsg *rtmsg, | |
1458 | size_t req_size, int cmd) | |
1459 | { | |
1460 | ||
1461 | char label_buf[256]; | |
1462 | struct vrf *vrf; | |
1463 | char addrstr[INET6_ADDRSTRLEN]; | |
1464 | ||
1465 | assert(nexthop); | |
1466 | ||
1467 | vrf = vrf_lookup_by_id(nexthop->vrf_id); | |
1468 | ||
1469 | if (!_netlink_route_encode_label_info(nexthop->nh_label, nlmsg, | |
1470 | req_size, rtmsg, label_buf, | |
1471 | sizeof(label_buf))) | |
1472 | return false; | |
1473 | ||
eab0f8f0 HS |
1474 | if (nexthop->nh_srv6) { |
1475 | if (nexthop->nh_srv6->seg6local_action != | |
1476 | ZEBRA_SEG6_LOCAL_ACTION_UNSPEC) { | |
1477 | struct rtattr *nest; | |
1478 | const struct seg6local_context *ctx; | |
52026569 | 1479 | |
eab0f8f0 HS |
1480 | ctx = &nexthop->nh_srv6->seg6local_ctx; |
1481 | if (!nl_attr_put16(nlmsg, req_size, RTA_ENCAP_TYPE, | |
1482 | LWTUNNEL_ENCAP_SEG6_LOCAL)) | |
52026569 | 1483 | return false; |
eab0f8f0 HS |
1484 | |
1485 | nest = nl_attr_nest(nlmsg, req_size, RTA_ENCAP); | |
1486 | if (!nest) | |
52026569 | 1487 | return false; |
eab0f8f0 HS |
1488 | |
1489 | switch (nexthop->nh_srv6->seg6local_action) { | |
1490 | case ZEBRA_SEG6_LOCAL_ACTION_END: | |
1491 | if (!nl_attr_put32(nlmsg, req_size, | |
1492 | SEG6_LOCAL_ACTION, | |
1493 | SEG6_LOCAL_ACTION_END)) | |
1494 | return false; | |
1495 | break; | |
1496 | case ZEBRA_SEG6_LOCAL_ACTION_END_X: | |
1497 | if (!nl_attr_put32(nlmsg, req_size, | |
1498 | SEG6_LOCAL_ACTION, | |
1499 | SEG6_LOCAL_ACTION_END_X)) | |
1500 | return false; | |
1501 | if (!nl_attr_put(nlmsg, req_size, | |
1502 | SEG6_LOCAL_NH6, &ctx->nh6, | |
1503 | sizeof(struct in6_addr))) | |
1504 | return false; | |
1505 | break; | |
1506 | case ZEBRA_SEG6_LOCAL_ACTION_END_T: | |
1507 | if (!nl_attr_put32(nlmsg, req_size, | |
1508 | SEG6_LOCAL_ACTION, | |
1509 | SEG6_LOCAL_ACTION_END_T)) | |
1510 | return false; | |
1511 | if (!nl_attr_put32(nlmsg, req_size, | |
1512 | SEG6_LOCAL_TABLE, | |
1513 | ctx->table)) | |
1514 | return false; | |
1515 | break; | |
1516 | case ZEBRA_SEG6_LOCAL_ACTION_END_DX4: | |
1517 | if (!nl_attr_put32(nlmsg, req_size, | |
1518 | SEG6_LOCAL_ACTION, | |
1519 | SEG6_LOCAL_ACTION_END_DX4)) | |
1520 | return false; | |
1521 | if (!nl_attr_put(nlmsg, req_size, | |
1522 | SEG6_LOCAL_NH4, &ctx->nh4, | |
1523 | sizeof(struct in_addr))) | |
1524 | return false; | |
1525 | break; | |
1526 | case ZEBRA_SEG6_LOCAL_ACTION_END_DT6: | |
1527 | if (!nl_attr_put32(nlmsg, req_size, | |
1528 | SEG6_LOCAL_ACTION, | |
1529 | SEG6_LOCAL_ACTION_END_DT6)) | |
1530 | return false; | |
1531 | if (!nl_attr_put32(nlmsg, req_size, | |
1532 | SEG6_LOCAL_TABLE, | |
1533 | ctx->table)) | |
1534 | return false; | |
1535 | break; | |
7eab60a7 RS |
1536 | case ZEBRA_SEG6_LOCAL_ACTION_END_DT4: |
1537 | if (!nl_attr_put32(nlmsg, req_size, | |
1538 | SEG6_LOCAL_ACTION, | |
1539 | SEG6_LOCAL_ACTION_END_DT4)) | |
1540 | return false; | |
1541 | if (!nl_attr_put32(nlmsg, req_size, | |
1542 | SEG6_LOCAL_VRFTABLE, | |
1543 | ctx->table)) | |
1544 | return false; | |
1545 | break; | |
8bea07e4 CS |
1546 | case ZEBRA_SEG6_LOCAL_ACTION_END_DT46: |
1547 | if (!nl_attr_put32(nlmsg, req_size, | |
1548 | SEG6_LOCAL_ACTION, | |
1549 | SEG6_LOCAL_ACTION_END_DT46)) | |
1550 | return false; | |
1551 | if (!nl_attr_put32(nlmsg, req_size, | |
1552 | SEG6_LOCAL_VRFTABLE, | |
1553 | ctx->table)) | |
1554 | return false; | |
1555 | break; | |
eab0f8f0 HS |
1556 | default: |
1557 | zlog_err("%s: unsupport seg6local behaviour action=%u", | |
1558 | __func__, | |
1559 | nexthop->nh_srv6->seg6local_action); | |
0a543b79 | 1560 | return false; |
eab0f8f0 HS |
1561 | } |
1562 | nl_attr_nest_end(nlmsg, nest); | |
1563 | } | |
1564 | ||
1565 | if (!sid_zero(&nexthop->nh_srv6->seg6_segs)) { | |
1566 | char tun_buf[4096]; | |
1567 | ssize_t tun_len; | |
1568 | struct rtattr *nest; | |
1569 | ||
1570 | if (!nl_attr_put16(nlmsg, req_size, RTA_ENCAP_TYPE, | |
1571 | LWTUNNEL_ENCAP_SEG6)) | |
52026569 | 1572 | return false; |
eab0f8f0 HS |
1573 | nest = nl_attr_nest(nlmsg, req_size, RTA_ENCAP); |
1574 | if (!nest) | |
52026569 | 1575 | return false; |
eab0f8f0 HS |
1576 | tun_len = fill_seg6ipt_encap(tun_buf, sizeof(tun_buf), |
1577 | &nexthop->nh_srv6->seg6_segs); | |
1578 | if (tun_len < 0) | |
52026569 | 1579 | return false; |
eab0f8f0 HS |
1580 | if (!nl_attr_put(nlmsg, req_size, SEG6_IPTUNNEL_SRH, |
1581 | tun_buf, tun_len)) | |
52026569 | 1582 | return false; |
eab0f8f0 | 1583 | nl_attr_nest_end(nlmsg, nest); |
8689b25a | 1584 | } |
76fb7ae4 HS |
1585 | } |
1586 | ||
d62a17ae | 1587 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ONLINK)) |
1588 | rtmsg->rtm_flags |= RTNH_F_ONLINK; | |
1589 | ||
002e5c43 | 1590 | if (is_route_v4_over_v6(rtmsg->rtm_family, nexthop->type)) { |
d62a17ae | 1591 | rtmsg->rtm_flags |= RTNH_F_ONLINK; |
0be6e7d7 JU |
1592 | if (!nl_attr_put(nlmsg, req_size, RTA_GATEWAY, &ipv4_ll, 4)) |
1593 | return false; | |
1594 | if (!nl_attr_put32(nlmsg, req_size, RTA_OIF, nexthop->ifindex)) | |
1595 | return false; | |
d62a17ae | 1596 | |
a757997c JU |
1597 | if (cmd == RTM_NEWROUTE) { |
1598 | if (!_netlink_route_encode_nexthop_src( | |
1599 | nexthop, AF_INET, nlmsg, req_size, bytelen)) | |
0be6e7d7 JU |
1600 | return false; |
1601 | } | |
d62a17ae | 1602 | |
1603 | if (IS_ZEBRA_DEBUG_KERNEL) | |
9266b315 RZ |
1604 | zlog_debug("%s: 5549 (%s): %pFX nexthop via %s %s if %u vrf %s(%u)", |
1605 | __func__, routedesc, p, ipv4_ll_buf, | |
1606 | label_buf, nexthop->ifindex, | |
1607 | VRF_LOGNAME(vrf), nexthop->vrf_id); | |
0be6e7d7 | 1608 | return true; |
0aabccc0 DD |
1609 | } |
1610 | ||
d62a17ae | 1611 | if (nexthop->type == NEXTHOP_TYPE_IPV4 |
1612 | || nexthop->type == NEXTHOP_TYPE_IPV4_IFINDEX) { | |
1613 | /* Send deletes to the kernel without specifying the next-hop */ | |
0be6e7d7 JU |
1614 | if (cmd != RTM_DELROUTE) { |
1615 | if (!_netlink_route_add_gateway_info( | |
1616 | rtmsg->rtm_family, AF_INET, nlmsg, req_size, | |
1617 | bytelen, nexthop)) | |
1618 | return false; | |
1619 | } | |
d62a17ae | 1620 | |
1621 | if (cmd == RTM_NEWROUTE) { | |
a757997c JU |
1622 | if (!_netlink_route_encode_nexthop_src( |
1623 | nexthop, AF_INET, nlmsg, req_size, bytelen)) | |
1624 | return false; | |
d62a17ae | 1625 | } |
1626 | ||
9266b315 RZ |
1627 | if (IS_ZEBRA_DEBUG_KERNEL) { |
1628 | inet_ntop(AF_INET, &nexthop->gate.ipv4, addrstr, | |
1629 | sizeof(addrstr)); | |
1630 | zlog_debug("%s: (%s): %pFX nexthop via %s %s if %u vrf %s(%u)", | |
1631 | __func__, routedesc, p, addrstr, label_buf, | |
1632 | nexthop->ifindex, VRF_LOGNAME(vrf), | |
1633 | nexthop->vrf_id); | |
1634 | } | |
0aabccc0 | 1635 | } |
fa713d9e | 1636 | |
d62a17ae | 1637 | if (nexthop->type == NEXTHOP_TYPE_IPV6 |
1638 | || nexthop->type == NEXTHOP_TYPE_IPV6_IFINDEX) { | |
0be6e7d7 JU |
1639 | if (!_netlink_route_add_gateway_info(rtmsg->rtm_family, |
1640 | AF_INET6, nlmsg, req_size, | |
1641 | bytelen, nexthop)) | |
1642 | return false; | |
d62a17ae | 1643 | |
1644 | if (cmd == RTM_NEWROUTE) { | |
a757997c JU |
1645 | if (!_netlink_route_encode_nexthop_src( |
1646 | nexthop, AF_INET6, nlmsg, req_size, | |
1647 | bytelen)) | |
1648 | return false; | |
d62a17ae | 1649 | } |
fa713d9e | 1650 | |
9266b315 RZ |
1651 | if (IS_ZEBRA_DEBUG_KERNEL) { |
1652 | inet_ntop(AF_INET6, &nexthop->gate.ipv6, addrstr, | |
1653 | sizeof(addrstr)); | |
1654 | zlog_debug("%s: (%s): %pFX nexthop via %s %s if %u vrf %s(%u)", | |
1655 | __func__, routedesc, p, addrstr, label_buf, | |
1656 | nexthop->ifindex, VRF_LOGNAME(vrf), | |
1657 | nexthop->vrf_id); | |
1658 | } | |
d62a17ae | 1659 | } |
5e210522 DS |
1660 | |
1661 | /* | |
1662 | * We have the ifindex so we should always send it | |
1663 | * This is especially useful if we are doing route | |
1664 | * leaking. | |
1665 | */ | |
0be6e7d7 JU |
1666 | if (nexthop->type != NEXTHOP_TYPE_BLACKHOLE) { |
1667 | if (!nl_attr_put32(nlmsg, req_size, RTA_OIF, nexthop->ifindex)) | |
1668 | return false; | |
1669 | } | |
d62a17ae | 1670 | |
275565fb | 1671 | if (nexthop->type == NEXTHOP_TYPE_IFINDEX) { |
d62a17ae | 1672 | if (cmd == RTM_NEWROUTE) { |
a757997c JU |
1673 | if (!_netlink_route_encode_nexthop_src( |
1674 | nexthop, AF_INET, nlmsg, req_size, bytelen)) | |
1675 | return false; | |
d62a17ae | 1676 | } |
fa713d9e | 1677 | |
d62a17ae | 1678 | if (IS_ZEBRA_DEBUG_KERNEL) |
9266b315 RZ |
1679 | zlog_debug("%s: (%s): %pFX nexthop via if %u vrf %s(%u)", |
1680 | __func__, routedesc, p, nexthop->ifindex, | |
1681 | VRF_LOGNAME(vrf), nexthop->vrf_id); | |
0aabccc0 | 1682 | } |
0be6e7d7 JU |
1683 | |
1684 | return true; | |
fa713d9e CF |
1685 | } |
1686 | ||
63eaefa8 R |
1687 | /* This function appends tag value as rtnl flow attribute |
1688 | * to the given netlink msg only if value is less than 256. | |
1689 | * Used only if SUPPORT_REALMS enabled. | |
1690 | * | |
1691 | * @param nlmsg: nlmsghdr structure to fill in. | |
1692 | * @param maxlen: The size allocated for the message. | |
1693 | * @param tag: The route tag. | |
1694 | * | |
1695 | * The function returns true if the flow attribute could | |
1696 | * be added to the message, otherwise false is returned. | |
1697 | */ | |
1698 | static inline bool _netlink_set_tag(struct nlmsghdr *n, unsigned int maxlen, | |
1699 | route_tag_t tag) | |
1700 | { | |
1701 | if (tag > 0 && tag <= 255) { | |
1702 | if (!nl_attr_put32(n, maxlen, RTA_FLOW, tag)) | |
1703 | return false; | |
1704 | } | |
1705 | return true; | |
1706 | } | |
1707 | ||
fa713d9e | 1708 | /* This function takes a nexthop as argument and |
312a6bee | 1709 | * appends to the given netlink msg. If the nexthop |
fa713d9e CF |
1710 | * defines a preferred source, the src parameter |
1711 | * will be modified to point to that src, otherwise | |
1712 | * it will be kept unmodified. | |
1713 | * | |
1714 | * @param routedesc: Human readable description of route type | |
1715 | * (direct/recursive, single-/multipath) | |
1716 | * @param bytelen: Length of addresses in bytes. | |
1717 | * @param nexthop: Nexthop information | |
312a6bee JU |
1718 | * @param nlmsg: nlmsghdr structure to fill in. |
1719 | * @param req_size: The size allocated for the message. | |
fa713d9e CF |
1720 | * @param src: pointer pointing to a location where |
1721 | * the prefsrc should be stored. | |
0be6e7d7 JU |
1722 | * |
1723 | * The function returns true if the nexthop could be added | |
1724 | * to the message, otherwise false is returned. | |
fa713d9e | 1725 | */ |
63eaefa8 R |
1726 | static bool _netlink_route_build_multipath( |
1727 | const struct prefix *p, const char *routedesc, int bytelen, | |
1728 | const struct nexthop *nexthop, struct nlmsghdr *nlmsg, size_t req_size, | |
1729 | struct rtmsg *rtmsg, const union g_addr **src, route_tag_t tag) | |
fa713d9e | 1730 | { |
9a62e84b | 1731 | char label_buf[256]; |
bd47f3a3 | 1732 | struct vrf *vrf; |
312a6bee | 1733 | struct rtnexthop *rtnh; |
d62a17ae | 1734 | |
312a6bee | 1735 | rtnh = nl_attr_rtnh(nlmsg, req_size); |
0be6e7d7 JU |
1736 | if (rtnh == NULL) |
1737 | return false; | |
d62a17ae | 1738 | |
b7537db6 SW |
1739 | assert(nexthop); |
1740 | ||
bd47f3a3 JU |
1741 | vrf = vrf_lookup_by_id(nexthop->vrf_id); |
1742 | ||
a757997c JU |
1743 | if (!_netlink_route_encode_label_info(nexthop->nh_label, nlmsg, |
1744 | req_size, rtmsg, label_buf, | |
1745 | sizeof(label_buf))) | |
1746 | return false; | |
d62a17ae | 1747 | |
1748 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ONLINK)) | |
1749 | rtnh->rtnh_flags |= RTNH_F_ONLINK; | |
1750 | ||
002e5c43 | 1751 | if (is_route_v4_over_v6(rtmsg->rtm_family, nexthop->type)) { |
d62a17ae | 1752 | rtnh->rtnh_flags |= RTNH_F_ONLINK; |
a757997c | 1753 | if (!nl_attr_put(nlmsg, req_size, RTA_GATEWAY, &ipv4_ll, 4)) |
0be6e7d7 | 1754 | return false; |
d62a17ae | 1755 | rtnh->rtnh_ifindex = nexthop->ifindex; |
8d27e1aa | 1756 | if (nexthop->weight) |
1757 | rtnh->rtnh_hops = nexthop->weight - 1; | |
d62a17ae | 1758 | |
975a328e | 1759 | if (nexthop->rmap_src.ipv4.s_addr != INADDR_ANY) |
d62a17ae | 1760 | *src = &nexthop->rmap_src; |
975a328e | 1761 | else if (nexthop->src.ipv4.s_addr != INADDR_ANY) |
d62a17ae | 1762 | *src = &nexthop->src; |
1763 | ||
1764 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1765 | zlog_debug( | |
9266b315 RZ |
1766 | "%s: 5549 (%s): %pFX nexthop via %s %s if %u vrf %s(%u)", |
1767 | __func__, routedesc, p, ipv4_ll_buf, label_buf, | |
bd47f3a3 JU |
1768 | nexthop->ifindex, VRF_LOGNAME(vrf), |
1769 | nexthop->vrf_id); | |
312a6bee | 1770 | nl_attr_rtnh_end(nlmsg, rtnh); |
0be6e7d7 | 1771 | return true; |
d62a17ae | 1772 | } |
1773 | ||
1774 | if (nexthop->type == NEXTHOP_TYPE_IPV4 | |
1775 | || nexthop->type == NEXTHOP_TYPE_IPV4_IFINDEX) { | |
0be6e7d7 JU |
1776 | if (!_netlink_route_add_gateway_info(rtmsg->rtm_family, AF_INET, |
1777 | nlmsg, req_size, bytelen, | |
1778 | nexthop)) | |
1779 | return false; | |
1780 | ||
975a328e | 1781 | if (nexthop->rmap_src.ipv4.s_addr != INADDR_ANY) |
d62a17ae | 1782 | *src = &nexthop->rmap_src; |
975a328e | 1783 | else if (nexthop->src.ipv4.s_addr != INADDR_ANY) |
d62a17ae | 1784 | *src = &nexthop->src; |
1785 | ||
a50404aa RZ |
1786 | if (IS_ZEBRA_DEBUG_KERNEL) |
1787 | zlog_debug("%s: (%s): %pFX nexthop via %pI4 %s if %u vrf %s(%u)", | |
1788 | __func__, routedesc, p, &nexthop->gate.ipv4, | |
1789 | label_buf, nexthop->ifindex, | |
1790 | VRF_LOGNAME(vrf), nexthop->vrf_id); | |
d62a17ae | 1791 | } |
1792 | if (nexthop->type == NEXTHOP_TYPE_IPV6 | |
1793 | || nexthop->type == NEXTHOP_TYPE_IPV6_IFINDEX) { | |
0be6e7d7 JU |
1794 | if (!_netlink_route_add_gateway_info(rtmsg->rtm_family, |
1795 | AF_INET6, nlmsg, req_size, | |
1796 | bytelen, nexthop)) | |
1797 | return false; | |
d62a17ae | 1798 | |
1799 | if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->rmap_src.ipv6)) | |
1800 | *src = &nexthop->rmap_src; | |
1801 | else if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->src.ipv6)) | |
1802 | *src = &nexthop->src; | |
1803 | ||
a50404aa RZ |
1804 | if (IS_ZEBRA_DEBUG_KERNEL) |
1805 | zlog_debug("%s: (%s): %pFX nexthop via %pI6 %s if %u vrf %s(%u)", | |
1806 | __func__, routedesc, p, &nexthop->gate.ipv6, | |
1807 | label_buf, nexthop->ifindex, | |
1808 | VRF_LOGNAME(vrf), nexthop->vrf_id); | |
d62a17ae | 1809 | } |
5e210522 DS |
1810 | |
1811 | /* | |
1812 | * We have figured out the ifindex so we should always send it | |
1813 | * This is especially useful if we are doing route | |
1814 | * leaking. | |
1815 | */ | |
1816 | if (nexthop->type != NEXTHOP_TYPE_BLACKHOLE) | |
1817 | rtnh->rtnh_ifindex = nexthop->ifindex; | |
1818 | ||
d62a17ae | 1819 | /* ifindex */ |
275565fb | 1820 | if (nexthop->type == NEXTHOP_TYPE_IFINDEX) { |
975a328e | 1821 | if (nexthop->rmap_src.ipv4.s_addr != INADDR_ANY) |
d62a17ae | 1822 | *src = &nexthop->rmap_src; |
975a328e | 1823 | else if (nexthop->src.ipv4.s_addr != INADDR_ANY) |
d62a17ae | 1824 | *src = &nexthop->src; |
1825 | ||
1826 | if (IS_ZEBRA_DEBUG_KERNEL) | |
9266b315 RZ |
1827 | zlog_debug("%s: (%s): %pFX nexthop via if %u vrf %s(%u)", |
1828 | __func__, routedesc, p, nexthop->ifindex, | |
1829 | VRF_LOGNAME(vrf), nexthop->vrf_id); | |
d62a17ae | 1830 | } |
df7fb580 DS |
1831 | |
1832 | if (nexthop->weight) | |
1833 | rtnh->rtnh_hops = nexthop->weight - 1; | |
0be6e7d7 | 1834 | |
63eaefa8 R |
1835 | if (!_netlink_set_tag(nlmsg, req_size, tag)) |
1836 | return false; | |
1837 | ||
312a6bee | 1838 | nl_attr_rtnh_end(nlmsg, rtnh); |
0be6e7d7 | 1839 | return true; |
fa713d9e CF |
1840 | } |
1841 | ||
f2595bd5 DS |
1842 | static inline bool |
1843 | _netlink_mpls_build_singlepath(const struct prefix *p, const char *routedesc, | |
1844 | const struct zebra_nhlfe *nhlfe, | |
1845 | struct nlmsghdr *nlmsg, struct rtmsg *rtmsg, | |
1846 | size_t req_size, int cmd) | |
40c7bdb0 | 1847 | { |
d62a17ae | 1848 | int bytelen; |
d7c0a89a | 1849 | uint8_t family; |
40c7bdb0 | 1850 | |
d62a17ae | 1851 | family = NHLFE_FAMILY(nhlfe); |
1852 | bytelen = (family == AF_INET ? 4 : 16); | |
0be6e7d7 JU |
1853 | return _netlink_route_build_singlepath(p, routedesc, bytelen, |
1854 | nhlfe->nexthop, nlmsg, rtmsg, | |
1855 | req_size, cmd); | |
40c7bdb0 | 1856 | } |
1857 | ||
1858 | ||
0be6e7d7 | 1859 | static inline bool |
9a0132a5 | 1860 | _netlink_mpls_build_multipath(const struct prefix *p, const char *routedesc, |
f2595bd5 | 1861 | const struct zebra_nhlfe *nhlfe, |
312a6bee JU |
1862 | struct nlmsghdr *nlmsg, size_t req_size, |
1863 | struct rtmsg *rtmsg, const union g_addr **src) | |
40c7bdb0 | 1864 | { |
d62a17ae | 1865 | int bytelen; |
d7c0a89a | 1866 | uint8_t family; |
40c7bdb0 | 1867 | |
d62a17ae | 1868 | family = NHLFE_FAMILY(nhlfe); |
1869 | bytelen = (family == AF_INET ? 4 : 16); | |
0be6e7d7 JU |
1870 | return _netlink_route_build_multipath(p, routedesc, bytelen, |
1871 | nhlfe->nexthop, nlmsg, req_size, | |
63eaefa8 | 1872 | rtmsg, src, 0); |
40c7bdb0 | 1873 | } |
1874 | ||
d7c0a89a | 1875 | static void _netlink_mpls_debug(int cmd, uint32_t label, const char *routedesc) |
40c7bdb0 | 1876 | { |
d62a17ae | 1877 | if (IS_ZEBRA_DEBUG_KERNEL) |
0be6e7d7 JU |
1878 | zlog_debug("netlink_mpls_multipath_msg_encode() (%s): %s %u/20", |
1879 | routedesc, nl_msg_type_to_str(cmd), label); | |
fa713d9e CF |
1880 | } |
1881 | ||
05657ec2 PG |
1882 | static int netlink_neigh_update(int cmd, int ifindex, void *addr, char *lla, |
1883 | int llalen, ns_id_t ns_id, uint8_t family, | |
1884 | bool permanent, uint8_t protocol) | |
5c610faf | 1885 | { |
d62a17ae | 1886 | struct { |
1887 | struct nlmsghdr n; | |
1888 | struct ndmsg ndm; | |
1889 | char buf[256]; | |
1890 | } req; | |
5c610faf | 1891 | |
5895d33f | 1892 | struct zebra_ns *zns = zebra_ns_lookup(ns_id); |
8f7d9fc0 | 1893 | |
5605ecfc | 1894 | memset(&req, 0, sizeof(req)); |
5c610faf | 1895 | |
d62a17ae | 1896 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)); |
1897 | req.n.nlmsg_flags = NLM_F_CREATE | NLM_F_REQUEST; | |
1898 | req.n.nlmsg_type = cmd; // RTM_NEWNEIGH or RTM_DELNEIGH | |
1899 | req.n.nlmsg_pid = zns->netlink_cmd.snl.nl_pid; | |
a55ba23f | 1900 | |
05657ec2 | 1901 | req.ndm.ndm_family = family; |
d62a17ae | 1902 | req.ndm.ndm_ifindex = ifindex; |
1903 | req.ndm.ndm_type = RTN_UNICAST; | |
05657ec2 PG |
1904 | if (cmd == RTM_NEWNEIGH) { |
1905 | if (!permanent) | |
1906 | req.ndm.ndm_state = NUD_REACHABLE; | |
1907 | else | |
1908 | req.ndm.ndm_state = NUD_PERMANENT; | |
1909 | } else | |
1910 | req.ndm.ndm_state = NUD_FAILED; | |
5c610faf | 1911 | |
312a6bee JU |
1912 | nl_attr_put(&req.n, sizeof(req), NDA_PROTOCOL, &protocol, |
1913 | sizeof(protocol)); | |
05657ec2 | 1914 | req.ndm.ndm_type = RTN_UNICAST; |
df948efc PG |
1915 | nl_attr_put(&req.n, sizeof(req), NDA_DST, addr, |
1916 | family2addrsize(family)); | |
05657ec2 PG |
1917 | if (lla) |
1918 | nl_attr_put(&req.n, sizeof(req), NDA_LLADDR, lla, llalen); | |
5c610faf | 1919 | |
d62a17ae | 1920 | return netlink_talk(netlink_talk_filter, &req.n, &zns->netlink_cmd, zns, |
9bfadae8 | 1921 | false); |
5c610faf DS |
1922 | } |
1923 | ||
762288f5 SW |
1924 | static bool nexthop_set_src(const struct nexthop *nexthop, int family, |
1925 | union g_addr *src) | |
1926 | { | |
1927 | if (family == AF_INET) { | |
1928 | if (nexthop->rmap_src.ipv4.s_addr != INADDR_ANY) { | |
1929 | src->ipv4 = nexthop->rmap_src.ipv4; | |
1930 | return true; | |
1931 | } else if (nexthop->src.ipv4.s_addr != INADDR_ANY) { | |
1932 | src->ipv4 = nexthop->src.ipv4; | |
1933 | return true; | |
1934 | } | |
1935 | } else if (family == AF_INET6) { | |
1936 | if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->rmap_src.ipv6)) { | |
1937 | src->ipv6 = nexthop->rmap_src.ipv6; | |
1938 | return true; | |
1939 | } else if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->src.ipv6)) { | |
1940 | src->ipv6 = nexthop->src.ipv6; | |
1941 | return true; | |
1942 | } | |
1943 | } | |
1944 | ||
1945 | return false; | |
1946 | } | |
1947 | ||
0be6e7d7 JU |
1948 | /* |
1949 | * The function returns true if the attribute could be added | |
1950 | * to the message, otherwise false is returned. | |
1951 | */ | |
1952 | static int netlink_route_nexthop_encap(struct nlmsghdr *n, size_t nlen, | |
1953 | struct nexthop *nh) | |
f2a0ba3a RZ |
1954 | { |
1955 | struct rtattr *nest; | |
1956 | ||
1957 | switch (nh->nh_encap_type) { | |
1958 | case NET_VXLAN: | |
a757997c | 1959 | if (!nl_attr_put16(n, nlen, RTA_ENCAP_TYPE, nh->nh_encap_type)) |
0be6e7d7 | 1960 | return false; |
f2a0ba3a | 1961 | |
312a6bee | 1962 | nest = nl_attr_nest(n, nlen, RTA_ENCAP); |
0be6e7d7 JU |
1963 | if (!nest) |
1964 | return false; | |
1965 | ||
1966 | if (!nl_attr_put32(n, nlen, 0 /* VXLAN_VNI */, | |
1967 | nh->nh_encap.vni)) | |
1968 | return false; | |
312a6bee | 1969 | nl_attr_nest_end(n, nest); |
f2a0ba3a RZ |
1970 | break; |
1971 | } | |
0be6e7d7 JU |
1972 | |
1973 | return true; | |
f2a0ba3a RZ |
1974 | } |
1975 | ||
7cdb1a84 MS |
1976 | /* |
1977 | * Routing table change via netlink interface, using a dataplane context object | |
0be6e7d7 JU |
1978 | * |
1979 | * Returns -1 on failure, 0 when the msg doesn't fit entirely in the buffer | |
1980 | * otherwise the number of bytes written to buf. | |
7cdb1a84 | 1981 | */ |
0be6e7d7 JU |
1982 | ssize_t netlink_route_multipath_msg_encode(int cmd, |
1983 | struct zebra_dplane_ctx *ctx, | |
1984 | uint8_t *data, size_t datalen, | |
1985 | bool fpm, bool force_nhg) | |
7cdb1a84 MS |
1986 | { |
1987 | int bytelen; | |
7cdb1a84 MS |
1988 | struct nexthop *nexthop = NULL; |
1989 | unsigned int nexthop_num; | |
7cdb1a84 | 1990 | const char *routedesc; |
762288f5 | 1991 | bool setsrc = false; |
7cdb1a84 MS |
1992 | union g_addr src; |
1993 | const struct prefix *p, *src_p; | |
1994 | uint32_t table_id; | |
d4000d7b | 1995 | struct nlsock *nl; |
63eaefa8 | 1996 | route_tag_t tag = 0; |
7cdb1a84 MS |
1997 | |
1998 | struct { | |
1999 | struct nlmsghdr n; | |
2000 | struct rtmsg r; | |
e57a3fab RZ |
2001 | char buf[]; |
2002 | } *req = (void *)data; | |
7cdb1a84 MS |
2003 | |
2004 | p = dplane_ctx_get_dest(ctx); | |
2005 | src_p = dplane_ctx_get_src(ctx); | |
2006 | ||
0be6e7d7 JU |
2007 | if (datalen < sizeof(*req)) |
2008 | return 0; | |
2009 | ||
d4000d7b DS |
2010 | nl = kernel_netlink_nlsock_lookup(dplane_ctx_get_ns_sock(ctx)); |
2011 | ||
e57a3fab | 2012 | memset(req, 0, sizeof(*req)); |
7cdb1a84 | 2013 | |
b9c87515 | 2014 | bytelen = (p->family == AF_INET ? 4 : 16); |
7cdb1a84 | 2015 | |
e57a3fab RZ |
2016 | req->n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)); |
2017 | req->n.nlmsg_flags = NLM_F_CREATE | NLM_F_REQUEST; | |
7cdb1a84 | 2018 | |
334734a8 DS |
2019 | if ((cmd == RTM_NEWROUTE) && |
2020 | ((p->family == AF_INET) || v6_rr_semantics)) | |
e57a3fab | 2021 | req->n.nlmsg_flags |= NLM_F_REPLACE; |
7cdb1a84 | 2022 | |
e57a3fab | 2023 | req->n.nlmsg_type = cmd; |
7cdb1a84 | 2024 | |
d4000d7b | 2025 | req->n.nlmsg_pid = nl->snl.nl_pid; |
7cdb1a84 | 2026 | |
b9c87515 | 2027 | req->r.rtm_family = p->family; |
e57a3fab RZ |
2028 | req->r.rtm_dst_len = p->prefixlen; |
2029 | req->r.rtm_src_len = src_p ? src_p->prefixlen : 0; | |
2030 | req->r.rtm_scope = RT_SCOPE_UNIVERSE; | |
7cdb1a84 | 2031 | |
5709131c | 2032 | if (cmd == RTM_DELROUTE) |
e57a3fab | 2033 | req->r.rtm_protocol = zebra2proto(dplane_ctx_get_old_type(ctx)); |
5709131c | 2034 | else |
e57a3fab | 2035 | req->r.rtm_protocol = zebra2proto(dplane_ctx_get_type(ctx)); |
7cdb1a84 MS |
2036 | |
2037 | /* | |
2038 | * blackhole routes are not RTN_UNICAST, they are | |
2039 | * RTN_ BLACKHOLE|UNREACHABLE|PROHIBIT | |
2040 | * so setting this value as a RTN_UNICAST would | |
2041 | * cause the route lookup of just the prefix | |
2042 | * to fail. So no need to specify this for | |
2043 | * the RTM_DELROUTE case | |
2044 | */ | |
2045 | if (cmd != RTM_DELROUTE) | |
e57a3fab | 2046 | req->r.rtm_type = RTN_UNICAST; |
7cdb1a84 | 2047 | |
0be6e7d7 JU |
2048 | if (!nl_attr_put(&req->n, datalen, RTA_DST, &p->u.prefix, bytelen)) |
2049 | return 0; | |
2050 | if (src_p) { | |
2051 | if (!nl_attr_put(&req->n, datalen, RTA_SRC, &src_p->u.prefix, | |
2052 | bytelen)) | |
2053 | return 0; | |
2054 | } | |
7cdb1a84 MS |
2055 | |
2056 | /* Metric. */ | |
2057 | /* Hardcode the metric for all routes coming from zebra. Metric isn't | |
2058 | * used | |
2059 | * either by the kernel or by zebra. Its purely for calculating best | |
2060 | * path(s) | |
2061 | * by the routing protocol and for communicating with protocol peers. | |
2062 | */ | |
0be6e7d7 JU |
2063 | if (!nl_attr_put32(&req->n, datalen, RTA_PRIORITY, |
2064 | NL_DEFAULT_ROUTE_METRIC)) | |
2065 | return 0; | |
7cdb1a84 MS |
2066 | |
2067 | #if defined(SUPPORT_REALMS) | |
63eaefa8 R |
2068 | if (cmd == RTM_DELROUTE) |
2069 | tag = dplane_ctx_get_old_tag(ctx); | |
2070 | else | |
2071 | tag = dplane_ctx_get_tag(ctx); | |
7cdb1a84 | 2072 | #endif |
63eaefa8 | 2073 | |
7cdb1a84 MS |
2074 | /* Table corresponding to this route. */ |
2075 | table_id = dplane_ctx_get_table(ctx); | |
2076 | if (table_id < 256) | |
e57a3fab | 2077 | req->r.rtm_table = table_id; |
7cdb1a84 | 2078 | else { |
e57a3fab | 2079 | req->r.rtm_table = RT_TABLE_UNSPEC; |
0be6e7d7 JU |
2080 | if (!nl_attr_put32(&req->n, datalen, RTA_TABLE, table_id)) |
2081 | return 0; | |
7cdb1a84 MS |
2082 | } |
2083 | ||
9266b315 RZ |
2084 | if (IS_ZEBRA_DEBUG_KERNEL) |
2085 | zlog_debug( | |
2086 | "%s: %s %pFX vrf %u(%u)", __func__, | |
2087 | nl_msg_type_to_str(cmd), p, dplane_ctx_get_vrf(ctx), | |
2088 | table_id); | |
7cdb1a84 MS |
2089 | |
2090 | /* | |
2091 | * If we are not updating the route and we have received | |
2092 | * a route delete, then all we need to fill in is the | |
2093 | * prefix information to tell the kernel to schwack | |
2094 | * it. | |
2095 | */ | |
63eaefa8 R |
2096 | if (cmd == RTM_DELROUTE) { |
2097 | if (!_netlink_set_tag(&req->n, datalen, tag)) | |
2098 | return 0; | |
0be6e7d7 | 2099 | return NLMSG_ALIGN(req->n.nlmsg_len); |
63eaefa8 | 2100 | } |
7cdb1a84 MS |
2101 | |
2102 | if (dplane_ctx_get_mtu(ctx) || dplane_ctx_get_nh_mtu(ctx)) { | |
312a6bee | 2103 | struct rtattr *nest; |
7cdb1a84 MS |
2104 | uint32_t mtu = dplane_ctx_get_mtu(ctx); |
2105 | uint32_t nexthop_mtu = dplane_ctx_get_nh_mtu(ctx); | |
5709131c | 2106 | |
7cdb1a84 MS |
2107 | if (!mtu || (nexthop_mtu && nexthop_mtu < mtu)) |
2108 | mtu = nexthop_mtu; | |
312a6bee JU |
2109 | |
2110 | nest = nl_attr_nest(&req->n, datalen, RTA_METRICS); | |
0be6e7d7 JU |
2111 | if (nest == NULL) |
2112 | return 0; | |
2113 | ||
2114 | if (!nl_attr_put(&req->n, datalen, RTAX_MTU, &mtu, sizeof(mtu))) | |
2115 | return 0; | |
312a6bee | 2116 | nl_attr_nest_end(&req->n, nest); |
7cdb1a84 MS |
2117 | } |
2118 | ||
4be03ff4 IR |
2119 | /* |
2120 | * Always install blackhole routes without using nexthops, because of | |
2121 | * the following kernel problems: | |
2122 | * 1. Kernel nexthops don't suport unreachable/prohibit route types. | |
2123 | * 2. Blackhole kernel nexthops are deleted when loopback is down. | |
2124 | */ | |
2125 | nexthop = dplane_ctx_get_ng(ctx)->nexthop; | |
2126 | if (nexthop) { | |
2127 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_RECURSIVE)) | |
2128 | nexthop = nexthop->resolved; | |
2129 | ||
2130 | if (nexthop->type == NEXTHOP_TYPE_BLACKHOLE) { | |
2131 | switch (nexthop->bh_type) { | |
2132 | case BLACKHOLE_ADMINPROHIB: | |
2133 | req->r.rtm_type = RTN_PROHIBIT; | |
2134 | break; | |
2135 | case BLACKHOLE_REJECT: | |
2136 | req->r.rtm_type = RTN_UNREACHABLE; | |
2137 | break; | |
2138 | default: | |
2139 | req->r.rtm_type = RTN_BLACKHOLE; | |
2140 | break; | |
2141 | } | |
2142 | return NLMSG_ALIGN(req->n.nlmsg_len); | |
2143 | } | |
2144 | } | |
2145 | ||
6c67f41f SW |
2146 | if ((!fpm && kernel_nexthops_supported() |
2147 | && (!proto_nexthops_only() | |
2148 | || is_proto_nhg(dplane_ctx_get_nhe_id(ctx), 0))) | |
2149 | || (fpm && force_nhg)) { | |
d8bfd8dc | 2150 | /* Kernel supports nexthop objects */ |
9a0132a5 | 2151 | if (IS_ZEBRA_DEBUG_KERNEL) |
0be6e7d7 JU |
2152 | zlog_debug("%s: %pFX nhg_id is %u", __func__, p, |
2153 | dplane_ctx_get_nhe_id(ctx)); | |
e57a3fab | 2154 | |
0be6e7d7 JU |
2155 | if (!nl_attr_put32(&req->n, datalen, RTA_NH_ID, |
2156 | dplane_ctx_get_nhe_id(ctx))) | |
2157 | return 0; | |
d8bfd8dc SW |
2158 | |
2159 | /* Have to determine src still */ | |
2160 | for (ALL_NEXTHOPS_PTR(dplane_ctx_get_ng(ctx), nexthop)) { | |
2161 | if (setsrc) | |
2162 | break; | |
2163 | ||
e57a3fab | 2164 | setsrc = nexthop_set_src(nexthop, p->family, &src); |
d8bfd8dc SW |
2165 | } |
2166 | ||
2167 | if (setsrc) { | |
0be6e7d7 JU |
2168 | if (p->family == AF_INET) { |
2169 | if (!nl_attr_put(&req->n, datalen, RTA_PREFSRC, | |
2170 | &src.ipv4, bytelen)) | |
2171 | return 0; | |
2172 | } else if (p->family == AF_INET6) { | |
2173 | if (!nl_attr_put(&req->n, datalen, RTA_PREFSRC, | |
2174 | &src.ipv6, bytelen)) | |
2175 | return 0; | |
2176 | } | |
d8bfd8dc | 2177 | } |
f78fe8f3 | 2178 | |
0be6e7d7 | 2179 | return NLMSG_ALIGN(req->n.nlmsg_len); |
de3f5488 SW |
2180 | } |
2181 | ||
7cdb1a84 | 2182 | /* Count overall nexthops so we can decide whether to use singlepath |
5709131c MS |
2183 | * or multipath case. |
2184 | */ | |
7cdb1a84 MS |
2185 | nexthop_num = 0; |
2186 | for (ALL_NEXTHOPS_PTR(dplane_ctx_get_ng(ctx), nexthop)) { | |
2187 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_RECURSIVE)) | |
2188 | continue; | |
b9c87515 | 2189 | if (!NEXTHOP_IS_ACTIVE(nexthop->flags)) |
7cdb1a84 MS |
2190 | continue; |
2191 | ||
2192 | nexthop_num++; | |
2193 | } | |
2194 | ||
2195 | /* Singlepath case. */ | |
220f0f42 | 2196 | if (nexthop_num == 1) { |
7cdb1a84 MS |
2197 | nexthop_num = 0; |
2198 | for (ALL_NEXTHOPS_PTR(dplane_ctx_get_ng(ctx), nexthop)) { | |
7cdb1a84 MS |
2199 | if (CHECK_FLAG(nexthop->flags, |
2200 | NEXTHOP_FLAG_RECURSIVE)) { | |
5709131c MS |
2201 | |
2202 | if (setsrc) | |
2203 | continue; | |
2204 | ||
b9c87515 RZ |
2205 | setsrc = nexthop_set_src(nexthop, p->family, |
2206 | &src); | |
f183e380 | 2207 | continue; |
7cdb1a84 MS |
2208 | } |
2209 | ||
b9c87515 | 2210 | if (NEXTHOP_IS_ACTIVE(nexthop->flags)) { |
7cdb1a84 MS |
2211 | routedesc = nexthop->rparent |
2212 | ? "recursive, single-path" | |
2213 | : "single-path"; | |
2214 | ||
63eaefa8 R |
2215 | if (!_netlink_set_tag(&req->n, datalen, tag)) |
2216 | return 0; | |
2217 | ||
0be6e7d7 JU |
2218 | if (!_netlink_route_build_singlepath( |
2219 | p, routedesc, bytelen, nexthop, | |
2220 | &req->n, &req->r, datalen, cmd)) | |
2221 | return 0; | |
7cdb1a84 MS |
2222 | nexthop_num++; |
2223 | break; | |
2224 | } | |
f2a0ba3a RZ |
2225 | |
2226 | /* | |
2227 | * Add encapsulation information when installing via | |
2228 | * FPM. | |
2229 | */ | |
0be6e7d7 JU |
2230 | if (fpm) { |
2231 | if (!netlink_route_nexthop_encap( | |
2232 | &req->n, datalen, nexthop)) | |
2233 | return 0; | |
2234 | } | |
7cdb1a84 | 2235 | } |
f2a0ba3a | 2236 | |
13e0321a | 2237 | if (setsrc) { |
0be6e7d7 JU |
2238 | if (p->family == AF_INET) { |
2239 | if (!nl_attr_put(&req->n, datalen, RTA_PREFSRC, | |
2240 | &src.ipv4, bytelen)) | |
2241 | return 0; | |
2242 | } else if (p->family == AF_INET6) { | |
2243 | if (!nl_attr_put(&req->n, datalen, RTA_PREFSRC, | |
2244 | &src.ipv6, bytelen)) | |
2245 | return 0; | |
2246 | } | |
7cdb1a84 MS |
2247 | } |
2248 | } else { /* Multipath case */ | |
312a6bee | 2249 | struct rtattr *nest; |
81793ac1 | 2250 | const union g_addr *src1 = NULL; |
7cdb1a84 | 2251 | |
312a6bee | 2252 | nest = nl_attr_nest(&req->n, datalen, RTA_MULTIPATH); |
0be6e7d7 JU |
2253 | if (nest == NULL) |
2254 | return 0; | |
7cdb1a84 MS |
2255 | |
2256 | nexthop_num = 0; | |
2257 | for (ALL_NEXTHOPS_PTR(dplane_ctx_get_ng(ctx), nexthop)) { | |
7cdb1a84 MS |
2258 | if (CHECK_FLAG(nexthop->flags, |
2259 | NEXTHOP_FLAG_RECURSIVE)) { | |
2260 | /* This only works for IPv4 now */ | |
5709131c MS |
2261 | if (setsrc) |
2262 | continue; | |
2263 | ||
b9c87515 RZ |
2264 | setsrc = nexthop_set_src(nexthop, p->family, |
2265 | &src); | |
78e54ded | 2266 | continue; |
7cdb1a84 MS |
2267 | } |
2268 | ||
b9c87515 | 2269 | if (NEXTHOP_IS_ACTIVE(nexthop->flags)) { |
7cdb1a84 MS |
2270 | routedesc = nexthop->rparent |
2271 | ? "recursive, multipath" | |
2272 | : "multipath"; | |
2273 | nexthop_num++; | |
2274 | ||
0be6e7d7 JU |
2275 | if (!_netlink_route_build_multipath( |
2276 | p, routedesc, bytelen, nexthop, | |
63eaefa8 R |
2277 | &req->n, datalen, &req->r, &src1, |
2278 | tag)) | |
0be6e7d7 | 2279 | return 0; |
7cdb1a84 MS |
2280 | |
2281 | if (!setsrc && src1) { | |
b9c87515 | 2282 | if (p->family == AF_INET) |
7cdb1a84 | 2283 | src.ipv4 = src1->ipv4; |
b9c87515 | 2284 | else if (p->family == AF_INET6) |
7cdb1a84 MS |
2285 | src.ipv6 = src1->ipv6; |
2286 | ||
2287 | setsrc = 1; | |
2288 | } | |
2289 | } | |
312a6bee | 2290 | } |
0be6e7d7 | 2291 | |
312a6bee JU |
2292 | nl_attr_nest_end(&req->n, nest); |
2293 | ||
2294 | /* | |
2295 | * Add encapsulation information when installing via | |
2296 | * FPM. | |
2297 | */ | |
2298 | if (fpm) { | |
2299 | for (ALL_NEXTHOPS_PTR(dplane_ctx_get_ng(ctx), | |
2300 | nexthop)) { | |
2301 | if (CHECK_FLAG(nexthop->flags, | |
2302 | NEXTHOP_FLAG_RECURSIVE)) | |
2303 | continue; | |
0be6e7d7 JU |
2304 | if (!netlink_route_nexthop_encap( |
2305 | &req->n, datalen, nexthop)) | |
2306 | return 0; | |
312a6bee | 2307 | } |
7cdb1a84 | 2308 | } |
f2a0ba3a | 2309 | |
312a6bee | 2310 | |
13e0321a | 2311 | if (setsrc) { |
0be6e7d7 JU |
2312 | if (p->family == AF_INET) { |
2313 | if (!nl_attr_put(&req->n, datalen, RTA_PREFSRC, | |
2314 | &src.ipv4, bytelen)) | |
2315 | return 0; | |
2316 | } else if (p->family == AF_INET6) { | |
2317 | if (!nl_attr_put(&req->n, datalen, RTA_PREFSRC, | |
2318 | &src.ipv6, bytelen)) | |
2319 | return 0; | |
2320 | } | |
7cdb1a84 MS |
2321 | if (IS_ZEBRA_DEBUG_KERNEL) |
2322 | zlog_debug("Setting source"); | |
2323 | } | |
7cdb1a84 MS |
2324 | } |
2325 | ||
2326 | /* If there is no useful nexthop then return. */ | |
2327 | if (nexthop_num == 0) { | |
2328 | if (IS_ZEBRA_DEBUG_KERNEL) | |
9266b315 | 2329 | zlog_debug("%s: No useful nexthop.", __func__); |
7cdb1a84 MS |
2330 | } |
2331 | ||
312a6bee | 2332 | return NLMSG_ALIGN(req->n.nlmsg_len); |
7cdb1a84 MS |
2333 | } |
2334 | ||
43b5cc5e | 2335 | int kernel_get_ipmr_sg_stats(struct zebra_vrf *zvrf, void *in) |
e3be0432 | 2336 | { |
5523c156 | 2337 | uint32_t actual_table; |
d62a17ae | 2338 | int suc = 0; |
2339 | struct mcast_route_data *mr = (struct mcast_route_data *)in; | |
bd8b9272 DS |
2340 | struct { |
2341 | struct nlmsghdr n; | |
31071fe3 | 2342 | struct rtmsg rtm; |
bd8b9272 DS |
2343 | char buf[256]; |
2344 | } req; | |
e3be0432 | 2345 | |
d62a17ae | 2346 | mroute = mr; |
5895d33f | 2347 | struct zebra_ns *zns; |
bd8b9272 | 2348 | |
009f8ad5 | 2349 | zns = zvrf->zns; |
5605ecfc | 2350 | memset(&req, 0, sizeof(req)); |
bd8b9272 | 2351 | |
31071fe3 | 2352 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)); |
bd8b9272 DS |
2353 | req.n.nlmsg_flags = NLM_F_REQUEST; |
2354 | req.n.nlmsg_pid = zns->netlink_cmd.snl.nl_pid; | |
2355 | ||
bd8b9272 DS |
2356 | req.n.nlmsg_type = RTM_GETROUTE; |
2357 | ||
4d3b4b18 | 2358 | if (mroute->family == AF_INET) { |
31071fe3 | 2359 | req.rtm.rtm_family = RTNL_FAMILY_IPMR; |
e1cd4bb1 DL |
2360 | req.rtm.rtm_dst_len = IPV4_MAX_BITLEN; |
2361 | req.rtm.rtm_src_len = IPV4_MAX_BITLEN; | |
2362 | ||
4d3b4b18 MR |
2363 | nl_attr_put(&req.n, sizeof(req), RTA_SRC, |
2364 | &mroute->src.ipaddr_v4, | |
2365 | sizeof(mroute->src.ipaddr_v4)); | |
2366 | nl_attr_put(&req.n, sizeof(req), RTA_DST, | |
2367 | &mroute->grp.ipaddr_v4, | |
2368 | sizeof(mroute->grp.ipaddr_v4)); | |
2369 | } else { | |
31071fe3 | 2370 | req.rtm.rtm_family = RTNL_FAMILY_IP6MR; |
e1cd4bb1 DL |
2371 | req.rtm.rtm_dst_len = IPV6_MAX_BITLEN; |
2372 | req.rtm.rtm_src_len = IPV6_MAX_BITLEN; | |
2373 | ||
4d3b4b18 MR |
2374 | nl_attr_put(&req.n, sizeof(req), RTA_SRC, |
2375 | &mroute->src.ipaddr_v6, | |
2376 | sizeof(mroute->src.ipaddr_v6)); | |
2377 | nl_attr_put(&req.n, sizeof(req), RTA_DST, | |
2378 | &mroute->grp.ipaddr_v6, | |
2379 | sizeof(mroute->grp.ipaddr_v6)); | |
2380 | } | |
2381 | ||
5523c156 DS |
2382 | /* |
2383 | * What? | |
2384 | * | |
2385 | * So during the namespace cleanup we started storing | |
2386 | * the zvrf table_id for the default table as RT_TABLE_MAIN | |
2387 | * which is what the normal routing table for ip routing is. | |
2388 | * This change caused this to break our lookups of sg data | |
2389 | * because prior to this change the zvrf->table_id was 0 | |
2390 | * and when the pim multicast kernel code saw a 0, | |
2391 | * it was auto-translated to RT_TABLE_DEFAULT. But since | |
2392 | * we are now passing in RT_TABLE_MAIN there is no auto-translation | |
2393 | * and the kernel goes screw you and the delicious cookies you | |
2394 | * are trying to give me. So now we have this little hack. | |
2395 | */ | |
e1cd4bb1 DL |
2396 | if (mroute->family == AF_INET) |
2397 | actual_table = (zvrf->table_id == RT_TABLE_MAIN) | |
2398 | ? RT_TABLE_DEFAULT | |
2399 | : zvrf->table_id; | |
2400 | else | |
2401 | actual_table = zvrf->table_id; | |
2402 | ||
a757997c | 2403 | nl_attr_put32(&req.n, sizeof(req), RTA_TABLE, actual_table); |
e3be0432 | 2404 | |
bd8b9272 | 2405 | suc = netlink_talk(netlink_route_change_read_multicast, &req.n, |
9bfadae8 | 2406 | &zns->netlink_cmd, zns, false); |
e3be0432 | 2407 | |
bd8b9272 | 2408 | mroute = NULL; |
d62a17ae | 2409 | return suc; |
e3be0432 DS |
2410 | } |
2411 | ||
8d03bc50 SW |
2412 | /* Char length to debug ID with */ |
2413 | #define ID_LENGTH 10 | |
2414 | ||
0be6e7d7 | 2415 | static bool _netlink_nexthop_build_group(struct nlmsghdr *n, size_t req_size, |
8d03bc50 | 2416 | uint32_t id, |
e22e8001 | 2417 | const struct nh_grp *z_grp, |
569e1411 DS |
2418 | const uint8_t count, bool resilient, |
2419 | const struct nhg_resilience *nhgr) | |
565ce0d3 | 2420 | { |
565ce0d3 | 2421 | struct nexthop_grp grp[count]; |
8d03bc50 SW |
2422 | /* Need space for max group size, "/", and null term */ |
2423 | char buf[(MULTIPATH_NUM * (ID_LENGTH + 1)) + 1]; | |
2424 | char buf1[ID_LENGTH + 2]; | |
2425 | ||
2426 | buf[0] = '\0'; | |
565ce0d3 SW |
2427 | |
2428 | memset(grp, 0, sizeof(grp)); | |
2429 | ||
2430 | if (count) { | |
0c8215cb | 2431 | for (int i = 0; i < count; i++) { |
e22e8001 | 2432 | grp[i].id = z_grp[i].id; |
df7fb580 | 2433 | grp[i].weight = z_grp[i].weight - 1; |
8d03bc50 SW |
2434 | |
2435 | if (IS_ZEBRA_DEBUG_KERNEL) { | |
2436 | if (i == 0) | |
2437 | snprintf(buf, sizeof(buf1), "group %u", | |
2438 | grp[i].id); | |
2439 | else { | |
2440 | snprintf(buf1, sizeof(buf1), "/%u", | |
2441 | grp[i].id); | |
2442 | strlcat(buf, buf1, sizeof(buf)); | |
2443 | } | |
2444 | } | |
565ce0d3 | 2445 | } |
0be6e7d7 JU |
2446 | if (!nl_attr_put(n, req_size, NHA_GROUP, grp, |
2447 | count * sizeof(*grp))) | |
2448 | return false; | |
569e1411 DS |
2449 | |
2450 | if (resilient) { | |
2451 | struct rtattr *nest; | |
2452 | ||
2453 | nest = nl_attr_nest(n, req_size, NHA_RES_GROUP); | |
2454 | ||
2455 | nl_attr_put16(n, req_size, NHA_RES_GROUP_BUCKETS, | |
2456 | nhgr->buckets); | |
2457 | nl_attr_put32(n, req_size, NHA_RES_GROUP_IDLE_TIMER, | |
2458 | nhgr->idle_timer * 1000); | |
2459 | nl_attr_put32(n, req_size, | |
2460 | NHA_RES_GROUP_UNBALANCED_TIMER, | |
2461 | nhgr->unbalanced_timer * 1000); | |
2462 | nl_attr_nest_end(n, nest); | |
2463 | ||
2464 | nl_attr_put16(n, req_size, NHA_GROUP_TYPE, | |
2465 | NEXTHOP_GRP_TYPE_RES); | |
2466 | } | |
565ce0d3 | 2467 | } |
8d03bc50 SW |
2468 | |
2469 | if (IS_ZEBRA_DEBUG_KERNEL) | |
2470 | zlog_debug("%s: ID (%u): %s", __func__, id, buf); | |
0be6e7d7 JU |
2471 | |
2472 | return true; | |
565ce0d3 SW |
2473 | } |
2474 | ||
f820d025 | 2475 | /** |
e9a1cd93 | 2476 | * Next hop packet encoding helper function. |
f820d025 | 2477 | * |
e9a1cd93 RZ |
2478 | * \param[in] cmd netlink command. |
2479 | * \param[in] ctx dataplane context (information snapshot). | |
2480 | * \param[out] buf buffer to hold the packet. | |
2481 | * \param[in] buflen amount of buffer bytes. | |
f820d025 | 2482 | * |
0be6e7d7 JU |
2483 | * \returns -1 on failure, 0 when the msg doesn't fit entirely in the buffer |
2484 | * otherwise the number of bytes written to buf. | |
f820d025 | 2485 | */ |
0be6e7d7 JU |
2486 | ssize_t netlink_nexthop_msg_encode(uint16_t cmd, |
2487 | const struct zebra_dplane_ctx *ctx, | |
2488 | void *buf, size_t buflen) | |
f820d025 | 2489 | { |
f820d025 SW |
2490 | struct { |
2491 | struct nlmsghdr n; | |
2492 | struct nhmsg nhm; | |
e9a1cd93 RZ |
2493 | char buf[]; |
2494 | } *req = buf; | |
f820d025 | 2495 | |
8d03bc50 SW |
2496 | mpls_lse_t out_lse[MPLS_MAX_LABELS]; |
2497 | char label_buf[256]; | |
2498 | int num_labels = 0; | |
72938edf SW |
2499 | uint32_t id = dplane_ctx_get_nhe_id(ctx); |
2500 | int type = dplane_ctx_get_nhe_type(ctx); | |
bdd085a8 MS |
2501 | struct rtattr *nest; |
2502 | uint16_t encap; | |
d4000d7b DS |
2503 | struct nlsock *nl = |
2504 | kernel_netlink_nlsock_lookup(dplane_ctx_get_ns_sock(ctx)); | |
72938edf SW |
2505 | |
2506 | if (!id) { | |
2507 | flog_err( | |
2508 | EC_ZEBRA_NHG_FIB_UPDATE, | |
2509 | "Failed trying to update a nexthop group in the kernel that does not have an ID"); | |
2510 | return -1; | |
2511 | } | |
81505946 | 2512 | |
6c67f41f SW |
2513 | /* |
2514 | * Nothing to do if the kernel doesn't support nexthop objects or | |
2515 | * we dont want to install this type of NHG | |
2516 | */ | |
72938edf SW |
2517 | if (!kernel_nexthops_supported()) { |
2518 | if (IS_ZEBRA_DEBUG_KERNEL || IS_ZEBRA_DEBUG_NHG) | |
2519 | zlog_debug( | |
2520 | "%s: nhg_id %u (%s): kernel nexthops not supported, ignoring", | |
2521 | __func__, id, zebra_route_string(type)); | |
6c67f41f | 2522 | return 0; |
72938edf SW |
2523 | } |
2524 | ||
2525 | if (proto_nexthops_only() && !is_proto_nhg(id, type)) { | |
2526 | if (IS_ZEBRA_DEBUG_KERNEL || IS_ZEBRA_DEBUG_NHG) | |
2527 | zlog_debug( | |
2528 | "%s: nhg_id %u (%s): proto-based nexthops only, ignoring", | |
2529 | __func__, id, zebra_route_string(type)); | |
2530 | return 0; | |
2531 | } | |
6c67f41f | 2532 | |
8d03bc50 SW |
2533 | label_buf[0] = '\0'; |
2534 | ||
0be6e7d7 JU |
2535 | if (buflen < sizeof(*req)) |
2536 | return 0; | |
2537 | ||
2538 | memset(req, 0, sizeof(*req)); | |
f820d025 | 2539 | |
e9a1cd93 RZ |
2540 | req->n.nlmsg_len = NLMSG_LENGTH(sizeof(struct nhmsg)); |
2541 | req->n.nlmsg_flags = NLM_F_CREATE | NLM_F_REQUEST; | |
9a1588c4 SW |
2542 | |
2543 | if (cmd == RTM_NEWNEXTHOP) | |
e9a1cd93 | 2544 | req->n.nlmsg_flags |= NLM_F_REPLACE; |
9a1588c4 | 2545 | |
e9a1cd93 | 2546 | req->n.nlmsg_type = cmd; |
d4000d7b | 2547 | req->n.nlmsg_pid = nl->snl.nl_pid; |
f820d025 | 2548 | |
e9a1cd93 | 2549 | req->nhm.nh_family = AF_UNSPEC; |
fec211ad | 2550 | /* TODO: Scope? */ |
f820d025 | 2551 | |
0be6e7d7 JU |
2552 | if (!nl_attr_put32(&req->n, buflen, NHA_ID, id)) |
2553 | return 0; | |
f820d025 SW |
2554 | |
2555 | if (cmd == RTM_NEWNEXTHOP) { | |
bf1626a6 MS |
2556 | /* |
2557 | * We distinguish between a "group", which is a collection | |
2558 | * of ids, and a singleton nexthop with an id. The | |
2559 | * group is installed as an id that just refers to a list of | |
2560 | * other ids. | |
2561 | */ | |
0be6e7d7 | 2562 | if (dplane_ctx_get_nhe_nh_grp_count(ctx)) { |
569e1411 DS |
2563 | const struct nexthop_group *nhg; |
2564 | const struct nhg_resilience *nhgr; | |
2565 | ||
2566 | nhg = dplane_ctx_get_nhe_ng(ctx); | |
2567 | nhgr = &nhg->nhgr; | |
d52c949b | 2568 | if (!_netlink_nexthop_build_group( |
0be6e7d7 JU |
2569 | &req->n, buflen, id, |
2570 | dplane_ctx_get_nhe_nh_grp(ctx), | |
569e1411 DS |
2571 | dplane_ctx_get_nhe_nh_grp_count(ctx), |
2572 | !!nhgr->buckets, nhgr)) | |
0be6e7d7 JU |
2573 | return 0; |
2574 | } else { | |
0c8215cb SW |
2575 | const struct nexthop *nh = |
2576 | dplane_ctx_get_nhe_ng(ctx)->nexthop; | |
2577 | afi_t afi = dplane_ctx_get_nhe_afi(ctx); | |
e8b0e420 | 2578 | |
0c8215cb | 2579 | if (afi == AFI_IP) |
e9a1cd93 | 2580 | req->nhm.nh_family = AF_INET; |
0c8215cb | 2581 | else if (afi == AFI_IP6) |
e9a1cd93 | 2582 | req->nhm.nh_family = AF_INET6; |
f820d025 | 2583 | |
565ce0d3 | 2584 | switch (nh->type) { |
a6e6a6d8 | 2585 | case NEXTHOP_TYPE_IPV4: |
565ce0d3 | 2586 | case NEXTHOP_TYPE_IPV4_IFINDEX: |
0be6e7d7 JU |
2587 | if (!nl_attr_put(&req->n, buflen, NHA_GATEWAY, |
2588 | &nh->gate.ipv4, | |
2589 | IPV4_MAX_BYTELEN)) | |
2590 | return 0; | |
565ce0d3 | 2591 | break; |
a6e6a6d8 | 2592 | case NEXTHOP_TYPE_IPV6: |
565ce0d3 | 2593 | case NEXTHOP_TYPE_IPV6_IFINDEX: |
0be6e7d7 JU |
2594 | if (!nl_attr_put(&req->n, buflen, NHA_GATEWAY, |
2595 | &nh->gate.ipv6, | |
2596 | IPV6_MAX_BYTELEN)) | |
2597 | return 0; | |
565ce0d3 SW |
2598 | break; |
2599 | case NEXTHOP_TYPE_BLACKHOLE: | |
0be6e7d7 JU |
2600 | if (!nl_attr_put(&req->n, buflen, NHA_BLACKHOLE, |
2601 | NULL, 0)) | |
2602 | return 0; | |
8d03bc50 SW |
2603 | /* Blackhole shouldn't have anymore attributes |
2604 | */ | |
2605 | goto nexthop_done; | |
565ce0d3 SW |
2606 | case NEXTHOP_TYPE_IFINDEX: |
2607 | /* Don't need anymore info for this */ | |
2608 | break; | |
a6e6a6d8 SW |
2609 | } |
2610 | ||
2611 | if (!nh->ifindex) { | |
565ce0d3 SW |
2612 | flog_err( |
2613 | EC_ZEBRA_NHG_FIB_UPDATE, | |
2614 | "Context received for kernel nexthop update without an interface"); | |
2615 | return -1; | |
565ce0d3 SW |
2616 | } |
2617 | ||
0be6e7d7 JU |
2618 | if (!nl_attr_put32(&req->n, buflen, NHA_OIF, |
2619 | nh->ifindex)) | |
2620 | return 0; | |
8d03bc50 | 2621 | |
62d2ecb2 | 2622 | if (CHECK_FLAG(nh->flags, NEXTHOP_FLAG_ONLINK)) |
e9a1cd93 | 2623 | req->nhm.nh_flags |= RTNH_F_ONLINK; |
62d2ecb2 | 2624 | |
8d03bc50 SW |
2625 | num_labels = |
2626 | build_label_stack(nh->nh_label, out_lse, | |
2627 | label_buf, sizeof(label_buf)); | |
2628 | ||
2629 | if (num_labels) { | |
2630 | /* Set the BoS bit */ | |
2631 | out_lse[num_labels - 1] |= | |
2632 | htonl(1 << MPLS_LS_S_SHIFT); | |
2633 | ||
2634 | /* | |
2635 | * TODO: MPLS unsupported for now in kernel. | |
2636 | */ | |
e9a1cd93 | 2637 | if (req->nhm.nh_family == AF_MPLS) |
8d03bc50 | 2638 | goto nexthop_done; |
bdd085a8 MS |
2639 | |
2640 | encap = LWTUNNEL_ENCAP_MPLS; | |
2641 | if (!nl_attr_put16(&req->n, buflen, | |
2642 | NHA_ENCAP_TYPE, encap)) | |
2643 | return 0; | |
2644 | nest = nl_attr_nest(&req->n, buflen, NHA_ENCAP); | |
2645 | if (!nest) | |
2646 | return 0; | |
2647 | if (!nl_attr_put( | |
2648 | &req->n, buflen, MPLS_IPTUNNEL_DST, | |
2649 | &out_lse, | |
2650 | num_labels * sizeof(mpls_lse_t))) | |
2651 | return 0; | |
2652 | ||
2653 | nl_attr_nest_end(&req->n, nest); | |
8d03bc50 SW |
2654 | } |
2655 | ||
eab0f8f0 HS |
2656 | if (nh->nh_srv6) { |
2657 | if (nh->nh_srv6->seg6local_action != | |
2658 | ZEBRA_SEG6_LOCAL_ACTION_UNSPEC) { | |
2659 | uint32_t action; | |
2660 | uint16_t encap; | |
2661 | struct rtattr *nest; | |
2662 | const struct seg6local_context *ctx; | |
2663 | ||
2664 | req->nhm.nh_family = AF_INET6; | |
2665 | action = nh->nh_srv6->seg6local_action; | |
2666 | ctx = &nh->nh_srv6->seg6local_ctx; | |
2667 | encap = LWTUNNEL_ENCAP_SEG6_LOCAL; | |
2668 | if (!nl_attr_put(&req->n, buflen, | |
2669 | NHA_ENCAP_TYPE, | |
2670 | &encap, | |
2671 | sizeof(uint16_t))) | |
2672 | return 0; | |
8689b25a | 2673 | |
eab0f8f0 HS |
2674 | nest = nl_attr_nest(&req->n, buflen, |
2675 | NHA_ENCAP | NLA_F_NESTED); | |
2676 | if (!nest) | |
2677 | return 0; | |
52026569 | 2678 | |
eab0f8f0 HS |
2679 | switch (action) { |
2680 | case SEG6_LOCAL_ACTION_END: | |
2681 | if (!nl_attr_put32( | |
2682 | &req->n, buflen, | |
52026569 HS |
2683 | SEG6_LOCAL_ACTION, |
2684 | SEG6_LOCAL_ACTION_END)) | |
eab0f8f0 HS |
2685 | return 0; |
2686 | break; | |
2687 | case SEG6_LOCAL_ACTION_END_X: | |
2688 | if (!nl_attr_put32( | |
2689 | &req->n, buflen, | |
52026569 HS |
2690 | SEG6_LOCAL_ACTION, |
2691 | SEG6_LOCAL_ACTION_END_X)) | |
eab0f8f0 HS |
2692 | return 0; |
2693 | if (!nl_attr_put( | |
2694 | &req->n, buflen, | |
8689b25a | 2695 | SEG6_LOCAL_NH6, &ctx->nh6, |
52026569 | 2696 | sizeof(struct in6_addr))) |
eab0f8f0 HS |
2697 | return 0; |
2698 | break; | |
2699 | case SEG6_LOCAL_ACTION_END_T: | |
2700 | if (!nl_attr_put32( | |
2701 | &req->n, buflen, | |
52026569 HS |
2702 | SEG6_LOCAL_ACTION, |
2703 | SEG6_LOCAL_ACTION_END_T)) | |
eab0f8f0 HS |
2704 | return 0; |
2705 | if (!nl_attr_put32( | |
2706 | &req->n, buflen, | |
52026569 HS |
2707 | SEG6_LOCAL_TABLE, |
2708 | ctx->table)) | |
eab0f8f0 HS |
2709 | return 0; |
2710 | break; | |
2711 | case SEG6_LOCAL_ACTION_END_DX4: | |
2712 | if (!nl_attr_put32( | |
2713 | &req->n, buflen, | |
52026569 HS |
2714 | SEG6_LOCAL_ACTION, |
2715 | SEG6_LOCAL_ACTION_END_DX4)) | |
eab0f8f0 HS |
2716 | return 0; |
2717 | if (!nl_attr_put( | |
2718 | &req->n, buflen, | |
8689b25a | 2719 | SEG6_LOCAL_NH4, &ctx->nh4, |
52026569 | 2720 | sizeof(struct in_addr))) |
eab0f8f0 HS |
2721 | return 0; |
2722 | break; | |
2723 | case SEG6_LOCAL_ACTION_END_DT6: | |
2724 | if (!nl_attr_put32( | |
2725 | &req->n, buflen, | |
52026569 HS |
2726 | SEG6_LOCAL_ACTION, |
2727 | SEG6_LOCAL_ACTION_END_DT6)) | |
eab0f8f0 HS |
2728 | return 0; |
2729 | if (!nl_attr_put32( | |
2730 | &req->n, buflen, | |
52026569 HS |
2731 | SEG6_LOCAL_TABLE, |
2732 | ctx->table)) | |
eab0f8f0 HS |
2733 | return 0; |
2734 | break; | |
7eab60a7 RS |
2735 | case SEG6_LOCAL_ACTION_END_DT4: |
2736 | if (!nl_attr_put32( | |
2737 | &req->n, buflen, | |
2738 | SEG6_LOCAL_ACTION, | |
2739 | SEG6_LOCAL_ACTION_END_DT4)) | |
2740 | return 0; | |
2741 | if (!nl_attr_put32( | |
2742 | &req->n, buflen, | |
2743 | SEG6_LOCAL_VRFTABLE, | |
2744 | ctx->table)) | |
2745 | return 0; | |
2746 | break; | |
8bea07e4 CS |
2747 | case SEG6_LOCAL_ACTION_END_DT46: |
2748 | if (!nl_attr_put32( | |
2749 | &req->n, buflen, | |
2750 | SEG6_LOCAL_ACTION, | |
2751 | SEG6_LOCAL_ACTION_END_DT46)) | |
2752 | return 0; | |
2753 | if (!nl_attr_put32( | |
2754 | &req->n, buflen, | |
2755 | SEG6_LOCAL_VRFTABLE, | |
2756 | ctx->table)) | |
2757 | return 0; | |
2758 | break; | |
eab0f8f0 HS |
2759 | default: |
2760 | zlog_err("%s: unsupport seg6local behaviour action=%u", | |
2761 | __func__, action); | |
0a543b79 | 2762 | return 0; |
eab0f8f0 HS |
2763 | } |
2764 | nl_attr_nest_end(&req->n, nest); | |
8689b25a | 2765 | } |
8689b25a | 2766 | |
eab0f8f0 HS |
2767 | if (!sid_zero(&nh->nh_srv6->seg6_segs)) { |
2768 | char tun_buf[4096]; | |
2769 | ssize_t tun_len; | |
2770 | struct rtattr *nest; | |
76fb7ae4 | 2771 | |
eab0f8f0 HS |
2772 | if (!nl_attr_put16(&req->n, buflen, |
2773 | NHA_ENCAP_TYPE, | |
2774 | LWTUNNEL_ENCAP_SEG6)) | |
2775 | return 0; | |
2776 | nest = nl_attr_nest(&req->n, buflen, | |
2777 | NHA_ENCAP | NLA_F_NESTED); | |
2778 | if (!nest) | |
2779 | return 0; | |
2780 | tun_len = fill_seg6ipt_encap(tun_buf, | |
2781 | sizeof(tun_buf), | |
2782 | &nh->nh_srv6->seg6_segs); | |
2783 | if (tun_len < 0) | |
2784 | return 0; | |
2785 | if (!nl_attr_put(&req->n, buflen, | |
2786 | SEG6_IPTUNNEL_SRH, | |
2787 | tun_buf, tun_len)) | |
2788 | return 0; | |
2789 | nl_attr_nest_end(&req->n, nest); | |
2790 | } | |
76fb7ae4 HS |
2791 | } |
2792 | ||
bf1626a6 MS |
2793 | nexthop_done: |
2794 | ||
2795 | if (IS_ZEBRA_DEBUG_KERNEL) | |
2c77ddee DS |
2796 | zlog_debug("%s: ID (%u): %pNHv(%d) vrf %s(%u) %s ", |
2797 | __func__, id, nh, nh->ifindex, | |
bd47f3a3 JU |
2798 | vrf_id_to_name(nh->vrf_id), |
2799 | nh->vrf_id, label_buf); | |
bdd085a8 | 2800 | } |
f820d025 | 2801 | |
bdd085a8 | 2802 | req->nhm.nh_protocol = zebra2proto(type); |
f820d025 | 2803 | |
f820d025 SW |
2804 | } else if (cmd != RTM_DELNEXTHOP) { |
2805 | flog_err( | |
2806 | EC_ZEBRA_NHG_FIB_UPDATE, | |
2807 | "Nexthop group kernel update command (%d) does not exist", | |
2808 | cmd); | |
2809 | return -1; | |
2810 | } | |
2811 | ||
9266b315 RZ |
2812 | if (IS_ZEBRA_DEBUG_KERNEL) |
2813 | zlog_debug("%s: %s, id=%u", __func__, nl_msg_type_to_str(cmd), | |
2814 | id); | |
f820d025 | 2815 | |
e9a1cd93 | 2816 | return NLMSG_ALIGN(req->n.nlmsg_len); |
f820d025 SW |
2817 | } |
2818 | ||
67e3369e JU |
2819 | static ssize_t netlink_nexthop_msg_encoder(struct zebra_dplane_ctx *ctx, |
2820 | void *buf, size_t buflen) | |
f820d025 | 2821 | { |
bf1626a6 | 2822 | enum dplane_op_e op; |
98cda54a | 2823 | int cmd = 0; |
f820d025 | 2824 | |
bf1626a6 MS |
2825 | op = dplane_ctx_get_op(ctx); |
2826 | if (op == DPLANE_OP_NH_INSTALL || op == DPLANE_OP_NH_UPDATE) | |
f820d025 | 2827 | cmd = RTM_NEWNEXTHOP; |
bf1626a6 MS |
2828 | else if (op == DPLANE_OP_NH_DELETE) |
2829 | cmd = RTM_DELNEXTHOP; | |
2830 | else { | |
2831 | flog_err(EC_ZEBRA_NHG_FIB_UPDATE, | |
2832 | "Context received for kernel nexthop update with incorrect OP code (%u)", | |
2833 | op); | |
67e3369e | 2834 | return -1; |
f820d025 SW |
2835 | } |
2836 | ||
67e3369e JU |
2837 | return netlink_nexthop_msg_encode(cmd, ctx, buf, buflen); |
2838 | } | |
2839 | ||
67e3369e JU |
2840 | enum netlink_msg_status |
2841 | netlink_put_nexthop_update_msg(struct nl_batch *bth, | |
2842 | struct zebra_dplane_ctx *ctx) | |
2843 | { | |
e9a1cd93 RZ |
2844 | /* Nothing to do if the kernel doesn't support nexthop objects */ |
2845 | if (!kernel_nexthops_supported()) | |
67e3369e | 2846 | return FRR_NETLINK_SUCCESS; |
e9a1cd93 | 2847 | |
67e3369e JU |
2848 | return netlink_batch_add_msg(bth, ctx, netlink_nexthop_msg_encoder, |
2849 | false); | |
2850 | } | |
f820d025 | 2851 | |
67e3369e JU |
2852 | static ssize_t netlink_newroute_msg_encoder(struct zebra_dplane_ctx *ctx, |
2853 | void *buf, size_t buflen) | |
2854 | { | |
2855 | return netlink_route_multipath_msg_encode(RTM_NEWROUTE, ctx, buf, | |
2856 | buflen, false, false); | |
f820d025 SW |
2857 | } |
2858 | ||
67e3369e JU |
2859 | static ssize_t netlink_delroute_msg_encoder(struct zebra_dplane_ctx *ctx, |
2860 | void *buf, size_t buflen) | |
2861 | { | |
2862 | return netlink_route_multipath_msg_encode(RTM_DELROUTE, ctx, buf, | |
2863 | buflen, false, false); | |
2864 | } | |
2865 | ||
2866 | enum netlink_msg_status | |
2867 | netlink_put_route_update_msg(struct nl_batch *bth, struct zebra_dplane_ctx *ctx) | |
7cdb1a84 | 2868 | { |
67e3369e | 2869 | int cmd; |
7cdb1a84 MS |
2870 | const struct prefix *p = dplane_ctx_get_dest(ctx); |
2871 | ||
2872 | if (dplane_ctx_get_op(ctx) == DPLANE_OP_ROUTE_DELETE) { | |
2873 | cmd = RTM_DELROUTE; | |
2874 | } else if (dplane_ctx_get_op(ctx) == DPLANE_OP_ROUTE_INSTALL) { | |
2875 | cmd = RTM_NEWROUTE; | |
2876 | } else if (dplane_ctx_get_op(ctx) == DPLANE_OP_ROUTE_UPDATE) { | |
2877 | ||
2878 | if (p->family == AF_INET || v6_rr_semantics) { | |
2879 | /* Single 'replace' operation */ | |
fe5f21af DS |
2880 | |
2881 | /* | |
2882 | * With route replace semantics in place | |
2883 | * for v4 routes and the new route is a system | |
2884 | * route we do not install anything. | |
2885 | * The problem here is that the new system | |
2886 | * route should cause us to withdraw from | |
2887 | * the kernel the old non-system route | |
2888 | */ | |
67e3369e JU |
2889 | if (RSYSTEM_ROUTE(dplane_ctx_get_type(ctx)) |
2890 | && !RSYSTEM_ROUTE(dplane_ctx_get_old_type(ctx))) | |
6b390b3c | 2891 | return netlink_batch_add_msg( |
67e3369e JU |
2892 | bth, ctx, netlink_delroute_msg_encoder, |
2893 | true); | |
7cdb1a84 MS |
2894 | } else { |
2895 | /* | |
2896 | * So v6 route replace semantics are not in | |
2897 | * the kernel at this point as I understand it. | |
2898 | * so let's do a delete then an add. | |
2899 | * In the future once v6 route replace semantics | |
2900 | * are in we can figure out what to do here to | |
2901 | * allow working with old and new kernels. | |
2902 | * | |
2903 | * I'm also intentionally ignoring the failure case | |
2904 | * of the route delete. If that happens yeah we're | |
2905 | * screwed. | |
2906 | */ | |
67e3369e JU |
2907 | if (!RSYSTEM_ROUTE(dplane_ctx_get_old_type(ctx))) |
2908 | netlink_batch_add_msg( | |
2909 | bth, ctx, netlink_delroute_msg_encoder, | |
2910 | true); | |
7cdb1a84 MS |
2911 | } |
2912 | ||
67e3369e JU |
2913 | cmd = RTM_NEWROUTE; |
2914 | } else | |
2915 | return FRR_NETLINK_ERROR; | |
7cdb1a84 | 2916 | |
67e3369e JU |
2917 | if (RSYSTEM_ROUTE(dplane_ctx_get_type(ctx))) |
2918 | return FRR_NETLINK_SUCCESS; | |
0be6e7d7 | 2919 | |
67e3369e JU |
2920 | return netlink_batch_add_msg(bth, ctx, |
2921 | cmd == RTM_NEWROUTE | |
2922 | ? netlink_newroute_msg_encoder | |
2923 | : netlink_delroute_msg_encoder, | |
2924 | false); | |
2925 | } | |
7cdb1a84 | 2926 | |
d9f5b2f5 SW |
2927 | /** |
2928 | * netlink_nexthop_process_nh() - Parse the gatway/if info from a new nexthop | |
2929 | * | |
2930 | * @tb: Netlink RTA data | |
2931 | * @family: Address family in the nhmsg | |
8c0a24c1 | 2932 | * @ifp: Interface connected - this should be NULL, we fill it in |
d9f5b2f5 SW |
2933 | * @ns_id: Namspace id |
2934 | * | |
2935 | * Return: New nexthop | |
2936 | */ | |
e22e8001 SW |
2937 | static struct nexthop netlink_nexthop_process_nh(struct rtattr **tb, |
2938 | unsigned char family, | |
2939 | struct interface **ifp, | |
2940 | ns_id_t ns_id) | |
d9f5b2f5 | 2941 | { |
e22e8001 | 2942 | struct nexthop nh = {}; |
d9f5b2f5 | 2943 | void *gate = NULL; |
8e401b25 | 2944 | enum nexthop_types_t type = 0; |
e22e8001 SW |
2945 | int if_index = 0; |
2946 | size_t sz = 0; | |
7134ba70 | 2947 | struct interface *ifp_lookup; |
d9f5b2f5 SW |
2948 | |
2949 | if_index = *(int *)RTA_DATA(tb[NHA_OIF]); | |
2950 | ||
8e401b25 | 2951 | |
d9f5b2f5 SW |
2952 | if (tb[NHA_GATEWAY]) { |
2953 | switch (family) { | |
2954 | case AF_INET: | |
8e401b25 | 2955 | type = NEXTHOP_TYPE_IPV4_IFINDEX; |
d9f5b2f5 SW |
2956 | sz = 4; |
2957 | break; | |
2958 | case AF_INET6: | |
8e401b25 | 2959 | type = NEXTHOP_TYPE_IPV6_IFINDEX; |
d9f5b2f5 SW |
2960 | sz = 16; |
2961 | break; | |
2962 | default: | |
2963 | flog_warn( | |
2964 | EC_ZEBRA_BAD_NHG_MESSAGE, | |
c4239c05 | 2965 | "Nexthop gateway with bad address family (%d) received from kernel", |
d9f5b2f5 | 2966 | family); |
e22e8001 | 2967 | return nh; |
d9f5b2f5 SW |
2968 | } |
2969 | gate = RTA_DATA(tb[NHA_GATEWAY]); | |
e22e8001 | 2970 | } else |
8e401b25 | 2971 | type = NEXTHOP_TYPE_IFINDEX; |
d9f5b2f5 | 2972 | |
8e401b25 | 2973 | if (type) |
e22e8001 | 2974 | nh.type = type; |
8e401b25 SW |
2975 | |
2976 | if (gate) | |
e22e8001 | 2977 | memcpy(&(nh.gate), gate, sz); |
8e401b25 SW |
2978 | |
2979 | if (if_index) | |
e22e8001 | 2980 | nh.ifindex = if_index; |
8e401b25 | 2981 | |
7134ba70 DS |
2982 | ifp_lookup = |
2983 | if_lookup_by_index_per_ns(zebra_ns_lookup(ns_id), nh.ifindex); | |
2984 | ||
e22e8001 | 2985 | if (ifp) |
7134ba70 DS |
2986 | *ifp = ifp_lookup; |
2987 | if (ifp_lookup) | |
096f7609 | 2988 | nh.vrf_id = ifp_lookup->vrf->vrf_id; |
e22e8001 | 2989 | else { |
d9f5b2f5 SW |
2990 | flog_warn( |
2991 | EC_ZEBRA_UNKNOWN_INTERFACE, | |
2992 | "%s: Unknown nexthop interface %u received, defaulting to VRF_DEFAULT", | |
15569c58 | 2993 | __func__, nh.ifindex); |
d9f5b2f5 | 2994 | |
e22e8001 | 2995 | nh.vrf_id = VRF_DEFAULT; |
d9f5b2f5 SW |
2996 | } |
2997 | ||
2998 | if (tb[NHA_ENCAP] && tb[NHA_ENCAP_TYPE]) { | |
2999 | uint16_t encap_type = *(uint16_t *)RTA_DATA(tb[NHA_ENCAP_TYPE]); | |
3000 | int num_labels = 0; | |
6e728764 | 3001 | |
d9f5b2f5 SW |
3002 | mpls_label_t labels[MPLS_MAX_LABELS] = {0}; |
3003 | ||
e22e8001 | 3004 | if (encap_type == LWTUNNEL_ENCAP_MPLS) |
d9f5b2f5 | 3005 | num_labels = parse_encap_mpls(tb[NHA_ENCAP], labels); |
d9f5b2f5 | 3006 | |
e22e8001 SW |
3007 | if (num_labels) |
3008 | nexthop_add_labels(&nh, ZEBRA_LSP_STATIC, num_labels, | |
d9f5b2f5 | 3009 | labels); |
d9f5b2f5 SW |
3010 | } |
3011 | ||
3012 | return nh; | |
3013 | } | |
3014 | ||
85f5e761 | 3015 | static int netlink_nexthop_process_group(struct rtattr **tb, |
569e1411 DS |
3016 | struct nh_grp *z_grp, int z_grp_size, |
3017 | struct nhg_resilience *nhgr) | |
d9f5b2f5 | 3018 | { |
e22e8001 SW |
3019 | uint8_t count = 0; |
3020 | /* linux/nexthop.h group struct */ | |
d9f5b2f5 SW |
3021 | struct nexthop_grp *n_grp = NULL; |
3022 | ||
85f5e761 | 3023 | n_grp = (struct nexthop_grp *)RTA_DATA(tb[NHA_GROUP]); |
d9f5b2f5 SW |
3024 | count = (RTA_PAYLOAD(tb[NHA_GROUP]) / sizeof(*n_grp)); |
3025 | ||
3026 | if (!count || (count * sizeof(*n_grp)) != RTA_PAYLOAD(tb[NHA_GROUP])) { | |
3027 | flog_warn(EC_ZEBRA_BAD_NHG_MESSAGE, | |
3028 | "Invalid nexthop group received from the kernel"); | |
85f5e761 | 3029 | return count; |
d9f5b2f5 SW |
3030 | } |
3031 | ||
5a935f79 | 3032 | for (int i = 0; ((i < count) && (i < z_grp_size)); i++) { |
e22e8001 | 3033 | z_grp[i].id = n_grp[i].id; |
df7fb580 | 3034 | z_grp[i].weight = n_grp[i].weight + 1; |
85f5e761 | 3035 | } |
569e1411 DS |
3036 | |
3037 | memset(nhgr, 0, sizeof(*nhgr)); | |
3038 | if (tb[NHA_RES_GROUP]) { | |
3039 | struct rtattr *tbn[NHA_RES_GROUP_MAX + 1]; | |
3040 | struct rtattr *rta; | |
3041 | struct rtattr *res_group = tb[NHA_RES_GROUP]; | |
3042 | ||
3043 | netlink_parse_rtattr_nested(tbn, NHA_RES_GROUP_MAX, res_group); | |
3044 | ||
3045 | if (tbn[NHA_RES_GROUP_BUCKETS]) { | |
3046 | rta = tbn[NHA_RES_GROUP_BUCKETS]; | |
3047 | nhgr->buckets = *(uint16_t *)RTA_DATA(rta); | |
3048 | } | |
3049 | ||
3050 | if (tbn[NHA_RES_GROUP_IDLE_TIMER]) { | |
3051 | rta = tbn[NHA_RES_GROUP_IDLE_TIMER]; | |
3052 | nhgr->idle_timer = *(uint32_t *)RTA_DATA(rta); | |
3053 | } | |
3054 | ||
3055 | if (tbn[NHA_RES_GROUP_UNBALANCED_TIMER]) { | |
3056 | rta = tbn[NHA_RES_GROUP_UNBALANCED_TIMER]; | |
3057 | nhgr->unbalanced_timer = *(uint32_t *)RTA_DATA(rta); | |
3058 | } | |
3059 | ||
3060 | if (tbn[NHA_RES_GROUP_UNBALANCED_TIME]) { | |
3061 | rta = tbn[NHA_RES_GROUP_UNBALANCED_TIME]; | |
3062 | nhgr->unbalanced_time = *(uint64_t *)RTA_DATA(rta); | |
3063 | } | |
3064 | } | |
3065 | ||
d9f5b2f5 SW |
3066 | return count; |
3067 | } | |
3068 | ||
3069 | /** | |
3070 | * netlink_nexthop_change() - Read in change about nexthops from the kernel | |
3071 | * | |
3072 | * @h: Netlink message header | |
3073 | * @ns_id: Namspace id | |
3074 | * @startup: Are we reading under startup conditions? | |
3075 | * | |
3076 | * Return: Result status | |
3077 | */ | |
3078 | int netlink_nexthop_change(struct nlmsghdr *h, ns_id_t ns_id, int startup) | |
3079 | { | |
3080 | int len; | |
3081 | /* nexthop group id */ | |
3082 | uint32_t id; | |
3083 | unsigned char family; | |
38e40db1 | 3084 | int type; |
e8b0e420 | 3085 | afi_t afi = AFI_UNSPEC; |
946de1b9 | 3086 | vrf_id_t vrf_id = VRF_DEFAULT; |
8c0a24c1 | 3087 | struct interface *ifp = NULL; |
d9f5b2f5 | 3088 | struct nhmsg *nhm = NULL; |
e22e8001 SW |
3089 | struct nexthop nh = {}; |
3090 | struct nh_grp grp[MULTIPATH_NUM] = {}; | |
85f5e761 | 3091 | /* Count of nexthops in group array */ |
e22e8001 | 3092 | uint8_t grp_count = 0; |
e22e8001 | 3093 | struct rtattr *tb[NHA_MAX + 1] = {}; |
d9f5b2f5 | 3094 | |
1d80c209 DS |
3095 | frrtrace(3, frr_zebra, netlink_nexthop_change, h, ns_id, startup); |
3096 | ||
d9f5b2f5 SW |
3097 | nhm = NLMSG_DATA(h); |
3098 | ||
88cafda7 DS |
3099 | if (ns_id) |
3100 | vrf_id = ns_id; | |
3101 | ||
d9f5b2f5 SW |
3102 | if (startup && h->nlmsg_type != RTM_NEWNEXTHOP) |
3103 | return 0; | |
3104 | ||
3105 | len = h->nlmsg_len - NLMSG_LENGTH(sizeof(struct nhmsg)); | |
3106 | if (len < 0) { | |
3107 | zlog_warn( | |
3108 | "%s: Message received from netlink is of a broken size %d %zu", | |
15569c58 | 3109 | __func__, h->nlmsg_len, |
d9f5b2f5 SW |
3110 | (size_t)NLMSG_LENGTH(sizeof(struct nhmsg))); |
3111 | return -1; | |
3112 | } | |
3113 | ||
6e1e2e8d DS |
3114 | netlink_parse_rtattr_flags(tb, NHA_MAX, RTM_NHA(nhm), len, |
3115 | NLA_F_NESTED); | |
d9f5b2f5 SW |
3116 | |
3117 | ||
3118 | if (!tb[NHA_ID]) { | |
3119 | flog_warn( | |
3120 | EC_ZEBRA_BAD_NHG_MESSAGE, | |
3121 | "Nexthop group without an ID received from the kernel"); | |
3122 | return -1; | |
3123 | } | |
3124 | ||
3125 | /* We use the ID key'd nhg table for kernel updates */ | |
3126 | id = *((uint32_t *)RTA_DATA(tb[NHA_ID])); | |
d9f5b2f5 | 3127 | |
506efd37 AK |
3128 | if (zebra_evpn_mh_is_fdb_nh(id)) { |
3129 | /* If this is a L2 NH just ignore it */ | |
3130 | if (IS_ZEBRA_DEBUG_KERNEL || IS_ZEBRA_DEBUG_EVPN_MH_NH) { | |
3131 | zlog_debug("Ignore kernel update (%u) for fdb-nh 0x%x", | |
3132 | h->nlmsg_type, id); | |
3133 | } | |
3134 | return 0; | |
3135 | } | |
3136 | ||
e8b0e420 | 3137 | family = nhm->nh_family; |
e8b0e420 SW |
3138 | afi = family2afi(family); |
3139 | ||
38e40db1 SW |
3140 | type = proto2zebra(nhm->nh_protocol, 0, true); |
3141 | ||
fdee485a SW |
3142 | if (IS_ZEBRA_DEBUG_KERNEL) |
3143 | zlog_debug("%s ID (%u) %s NS %u", | |
3144 | nl_msg_type_to_str(h->nlmsg_type), id, | |
3145 | nl_family_to_str(family), ns_id); | |
3146 | ||
3147 | ||
d9f5b2f5 | 3148 | if (h->nlmsg_type == RTM_NEWNEXTHOP) { |
569e1411 DS |
3149 | struct nhg_resilience nhgr = {}; |
3150 | ||
d9f5b2f5 SW |
3151 | if (tb[NHA_GROUP]) { |
3152 | /** | |
3153 | * If this is a group message its only going to have | |
3154 | * an array of nexthop IDs associated with it | |
3155 | */ | |
5a935f79 | 3156 | grp_count = netlink_nexthop_process_group( |
569e1411 | 3157 | tb, grp, array_size(grp), &nhgr); |
85f5e761 SW |
3158 | } else { |
3159 | if (tb[NHA_BLACKHOLE]) { | |
3160 | /** | |
3161 | * This nexthop is just for blackhole-ing | |
3162 | * traffic, it should not have an OIF, GATEWAY, | |
3163 | * or ENCAP | |
3164 | */ | |
e22e8001 SW |
3165 | nh.type = NEXTHOP_TYPE_BLACKHOLE; |
3166 | nh.bh_type = BLACKHOLE_UNSPEC; | |
3167 | } else if (tb[NHA_OIF]) | |
85f5e761 SW |
3168 | /** |
3169 | * This is a true new nexthop, so we need | |
3170 | * to parse the gateway and device info | |
3171 | */ | |
3172 | nh = netlink_nexthop_process_nh(tb, family, | |
3173 | &ifp, ns_id); | |
e22e8001 SW |
3174 | else { |
3175 | ||
8e401b25 SW |
3176 | flog_warn( |
3177 | EC_ZEBRA_BAD_NHG_MESSAGE, | |
3178 | "Invalid Nexthop message received from the kernel with ID (%u)", | |
3179 | id); | |
3180 | return -1; | |
3181 | } | |
e22e8001 SW |
3182 | SET_FLAG(nh.flags, NEXTHOP_FLAG_ACTIVE); |
3183 | if (nhm->nh_flags & RTNH_F_ONLINK) | |
3184 | SET_FLAG(nh.flags, NEXTHOP_FLAG_ONLINK); | |
3185 | vrf_id = nh.vrf_id; | |
d9f5b2f5 SW |
3186 | } |
3187 | ||
38e40db1 | 3188 | if (zebra_nhg_kernel_find(id, &nh, grp, grp_count, vrf_id, afi, |
569e1411 | 3189 | type, startup, &nhgr)) |
e22e8001 | 3190 | return -1; |
8e401b25 | 3191 | |
9a1588c4 | 3192 | } else if (h->nlmsg_type == RTM_DELNEXTHOP) |
88cafda7 | 3193 | zebra_nhg_kernel_del(id, vrf_id); |
d9f5b2f5 | 3194 | |
d9f5b2f5 SW |
3195 | return 0; |
3196 | } | |
3197 | ||
3198 | /** | |
3199 | * netlink_request_nexthop() - Request nextop information from the kernel | |
3200 | * @zns: Zebra namespace | |
3201 | * @family: AF_* netlink family | |
3202 | * @type: RTM_* route type | |
3203 | * | |
3204 | * Return: Result status | |
3205 | */ | |
3206 | static int netlink_request_nexthop(struct zebra_ns *zns, int family, int type) | |
3207 | { | |
3208 | struct { | |
3209 | struct nlmsghdr n; | |
3210 | struct nhmsg nhm; | |
3211 | } req; | |
3212 | ||
3213 | /* Form the request, specifying filter (rtattr) if needed. */ | |
3214 | memset(&req, 0, sizeof(req)); | |
3215 | req.n.nlmsg_type = type; | |
3216 | req.n.nlmsg_flags = NLM_F_ROOT | NLM_F_MATCH | NLM_F_REQUEST; | |
3217 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct nhmsg)); | |
3218 | req.nhm.nh_family = family; | |
3219 | ||
fd3f8e52 | 3220 | return netlink_request(&zns->netlink_cmd, &req); |
d9f5b2f5 SW |
3221 | } |
3222 | ||
7d5bb02b | 3223 | |
d9f5b2f5 SW |
3224 | /** |
3225 | * netlink_nexthop_read() - Nexthop read function using netlink interface | |
3226 | * | |
3227 | * @zns: Zebra name space | |
3228 | * | |
3229 | * Return: Result status | |
3230 | * Only called at bootstrap time. | |
3231 | */ | |
3232 | int netlink_nexthop_read(struct zebra_ns *zns) | |
3233 | { | |
3234 | int ret; | |
3235 | struct zebra_dplane_info dp_info; | |
3236 | ||
3237 | zebra_dplane_info_from_zns(&dp_info, zns, true /*is_cmd*/); | |
3238 | ||
3239 | /* Get nexthop objects */ | |
3240 | ret = netlink_request_nexthop(zns, AF_UNSPEC, RTM_GETNEXTHOP); | |
3241 | if (ret < 0) | |
3242 | return ret; | |
3243 | ret = netlink_parse_info(netlink_nexthop_change, &zns->netlink_cmd, | |
9bfadae8 | 3244 | &dp_info, 0, true); |
81505946 SW |
3245 | |
3246 | if (!ret) | |
3247 | /* If we succesfully read in nexthop objects, | |
3248 | * this kernel must support them. | |
3249 | */ | |
3250 | supports_nh = true; | |
7c99d51b MS |
3251 | if (IS_ZEBRA_DEBUG_KERNEL || IS_ZEBRA_DEBUG_NHG) |
3252 | zlog_debug("Nexthop objects %ssupported on this kernel", | |
3253 | supports_nh ? "" : "not "); | |
090ee856 DS |
3254 | |
3255 | zebra_router_set_supports_nhgs(supports_nh); | |
81505946 | 3256 | |
60e0eaee | 3257 | return ret; |
d9f5b2f5 SW |
3258 | } |
3259 | ||
3260 | ||
05657ec2 PG |
3261 | int kernel_neigh_update(int add, int ifindex, void *addr, char *lla, int llalen, |
3262 | ns_id_t ns_id, uint8_t family, bool permanent) | |
6b8a5694 | 3263 | { |
d62a17ae | 3264 | return netlink_neigh_update(add ? RTM_NEWNEIGH : RTM_DELNEIGH, ifindex, |
05657ec2 PG |
3265 | addr, lla, llalen, ns_id, family, permanent, |
3266 | RTPROT_ZEBRA); | |
6b8a5694 | 3267 | } |
718e3744 | 3268 | |
340845e2 | 3269 | /** |
0be6e7d7 JU |
3270 | * netlink_neigh_update_msg_encode() - Common helper api for encoding |
3271 | * evpn neighbor update as netlink messages using dataplane context object. | |
bbd4285b | 3272 | * Here, a neighbor refers to a bridge forwarding database entry for |
3273 | * either unicast forwarding or head-end replication or an IP neighbor | |
3274 | * entry. | |
340845e2 JU |
3275 | * @ctx: Dataplane context |
3276 | * @cmd: Netlink command (RTM_NEWNEIGH or RTM_DELNEIGH) | |
0a27a2fe PG |
3277 | * @lla: A pointer to neighbor cache link layer address |
3278 | * @llalen: Length of the pointer to neighbor cache link layer | |
3279 | * address | |
340845e2 | 3280 | * @ip: A neighbor cache n/w layer destination address |
bbd4285b | 3281 | * In the case of bridge FDB, this represnts the remote |
3282 | * VTEP IP. | |
340845e2 JU |
3283 | * @replace_obj: Whether NEW request should replace existing object or |
3284 | * add to the end of the list | |
3285 | * @family: AF_* netlink family | |
3286 | * @type: RTN_* route type | |
3287 | * @flags: NTF_* flags | |
3288 | * @state: NUD_* states | |
d4d4ec1c RZ |
3289 | * @data: data buffer pointer |
3290 | * @datalen: total amount of data buffer space | |
0a27a2fe | 3291 | * @protocol: protocol information |
340845e2 | 3292 | * |
0be6e7d7 JU |
3293 | * Return: 0 when the msg doesn't fit entirely in the buffer |
3294 | * otherwise the number of bytes written to buf. | |
13d60d35 | 3295 | */ |
0be6e7d7 | 3296 | static ssize_t netlink_neigh_update_msg_encode( |
0a27a2fe PG |
3297 | const struct zebra_dplane_ctx *ctx, int cmd, const void *lla, |
3298 | int llalen, const struct ipaddr *ip, bool replace_obj, uint8_t family, | |
3299 | uint8_t type, uint8_t flags, uint16_t state, uint32_t nhg_id, bool nfy, | |
ccd187cd | 3300 | uint8_t nfy_flags, bool ext, uint32_t ext_flags, void *data, |
0a27a2fe | 3301 | size_t datalen, uint8_t protocol) |
13d60d35 | 3302 | { |
d62a17ae | 3303 | struct { |
3304 | struct nlmsghdr n; | |
3305 | struct ndmsg ndm; | |
d4d4ec1c RZ |
3306 | char buf[]; |
3307 | } *req = data; | |
340845e2 JU |
3308 | int ipa_len; |
3309 | enum dplane_op_e op; | |
d62a17ae | 3310 | |
0be6e7d7 JU |
3311 | if (datalen < sizeof(*req)) |
3312 | return 0; | |
45c80fbd | 3313 | memset(req, 0, sizeof(*req)); |
d62a17ae | 3314 | |
340845e2 JU |
3315 | op = dplane_ctx_get_op(ctx); |
3316 | ||
d4d4ec1c RZ |
3317 | req->n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)); |
3318 | req->n.nlmsg_flags = NLM_F_REQUEST; | |
d62a17ae | 3319 | if (cmd == RTM_NEWNEIGH) |
d4d4ec1c | 3320 | req->n.nlmsg_flags |= |
340845e2 JU |
3321 | NLM_F_CREATE |
3322 | | (replace_obj ? NLM_F_REPLACE : NLM_F_APPEND); | |
d4d4ec1c RZ |
3323 | req->n.nlmsg_type = cmd; |
3324 | req->ndm.ndm_family = family; | |
3325 | req->ndm.ndm_type = type; | |
3326 | req->ndm.ndm_state = state; | |
3327 | req->ndm.ndm_flags = flags; | |
3328 | req->ndm.ndm_ifindex = dplane_ctx_get_ifindex(ctx); | |
d62a17ae | 3329 | |
45c80fbd | 3330 | if (!nl_attr_put(&req->n, datalen, NDA_PROTOCOL, &protocol, |
0be6e7d7 JU |
3331 | sizeof(protocol))) |
3332 | return 0; | |
3333 | ||
0a27a2fe PG |
3334 | if (lla) { |
3335 | if (!nl_attr_put(&req->n, datalen, NDA_LLADDR, lla, llalen)) | |
0be6e7d7 JU |
3336 | return 0; |
3337 | } | |
13d60d35 | 3338 | |
f188e68e | 3339 | if (nfy) { |
4bcdb608 NA |
3340 | struct rtattr *nest; |
3341 | ||
3342 | nest = nl_attr_nest(&req->n, datalen, | |
3343 | NDA_FDB_EXT_ATTRS | NLA_F_NESTED); | |
3344 | if (!nest) | |
3345 | return 0; | |
3346 | ||
3347 | if (!nl_attr_put(&req->n, datalen, NFEA_ACTIVITY_NOTIFY, | |
3348 | &nfy_flags, sizeof(nfy_flags))) | |
f188e68e | 3349 | return 0; |
4bcdb608 NA |
3350 | if (!nl_attr_put(&req->n, datalen, NFEA_DONT_REFRESH, NULL, 0)) |
3351 | return 0; | |
3352 | ||
3353 | nl_attr_nest_end(&req->n, nest); | |
f188e68e | 3354 | } |
506efd37 | 3355 | |
4bcdb608 | 3356 | |
ccd187cd AK |
3357 | if (ext) { |
3358 | if (!nl_attr_put(&req->n, datalen, NDA_EXT_FLAGS, &ext_flags, | |
3359 | sizeof(ext_flags))) | |
3360 | return 0; | |
3361 | } | |
3362 | ||
80e19eb7 AK |
3363 | if (nhg_id) { |
3364 | if (!nl_attr_put32(&req->n, datalen, NDA_NH_ID, nhg_id)) | |
3365 | return 0; | |
3366 | } else { | |
3367 | ipa_len = | |
3368 | IS_IPADDR_V4(ip) ? IPV4_MAX_BYTELEN : IPV6_MAX_BYTELEN; | |
3369 | if (!nl_attr_put(&req->n, datalen, NDA_DST, &ip->ip.addr, | |
3370 | ipa_len)) | |
3371 | return 0; | |
3372 | } | |
340845e2 JU |
3373 | |
3374 | if (op == DPLANE_OP_MAC_INSTALL || op == DPLANE_OP_MAC_DELETE) { | |
3375 | vlanid_t vid = dplane_ctx_mac_get_vlan(ctx); | |
13d60d35 | 3376 | |
0be6e7d7 JU |
3377 | if (vid > 0) { |
3378 | if (!nl_attr_put16(&req->n, datalen, NDA_VLAN, vid)) | |
3379 | return 0; | |
3380 | } | |
13d60d35 | 3381 | |
0be6e7d7 JU |
3382 | if (!nl_attr_put32(&req->n, datalen, NDA_MASTER, |
3383 | dplane_ctx_mac_get_br_ifindex(ctx))) | |
3384 | return 0; | |
340845e2 | 3385 | } |
13d60d35 | 3386 | |
d4d4ec1c | 3387 | return NLMSG_ALIGN(req->n.nlmsg_len); |
13d60d35 | 3388 | } |
3389 | ||
340845e2 JU |
3390 | /* |
3391 | * Add remote VTEP to the flood list for this VxLAN interface (VNI). This | |
3392 | * is done by adding an FDB entry with a MAC of 00:00:00:00:00:00. | |
3393 | */ | |
67e3369e JU |
3394 | static ssize_t |
3395 | netlink_vxlan_flood_update_ctx(const struct zebra_dplane_ctx *ctx, int cmd, | |
3396 | void *buf, size_t buflen) | |
340845e2 JU |
3397 | { |
3398 | struct ethaddr dst_mac = {.octet = {0}}; | |
88217099 PG |
3399 | int proto = RTPROT_ZEBRA; |
3400 | ||
3401 | if (dplane_ctx_get_type(ctx) != 0) | |
3402 | proto = zebra2proto(dplane_ctx_get_type(ctx)); | |
d4d4ec1c | 3403 | |
67e3369e | 3404 | return netlink_neigh_update_msg_encode( |
0a27a2fe PG |
3405 | ctx, cmd, (const void *)&dst_mac, ETH_ALEN, |
3406 | dplane_ctx_neigh_get_ipaddr(ctx), false, PF_BRIDGE, 0, NTF_SELF, | |
3407 | (NUD_NOARP | NUD_PERMANENT), 0 /*nhg*/, false /*nfy*/, | |
3408 | 0 /*nfy_flags*/, false /*ext*/, 0 /*ext_flags*/, buf, buflen, | |
88217099 | 3409 | proto); |
340845e2 JU |
3410 | } |
3411 | ||
2232a77c | 3412 | #ifndef NDA_RTA |
d62a17ae | 3413 | #define NDA_RTA(r) \ |
3414 | ((struct rtattr *)(((char *)(r)) + NLMSG_ALIGN(sizeof(struct ndmsg)))) | |
2232a77c | 3415 | #endif |
3416 | ||
2414abd3 | 3417 | static int netlink_macfdb_change(struct nlmsghdr *h, int len, ns_id_t ns_id) |
2232a77c | 3418 | { |
d62a17ae | 3419 | struct ndmsg *ndm; |
3420 | struct interface *ifp; | |
3421 | struct zebra_if *zif; | |
d62a17ae | 3422 | struct rtattr *tb[NDA_MAX + 1]; |
3423 | struct interface *br_if; | |
3424 | struct ethaddr mac; | |
3425 | vlanid_t vid = 0; | |
4b3f26f4 | 3426 | struct in_addr vtep_ip; |
d62a17ae | 3427 | int vid_present = 0, dst_present = 0; |
d62a17ae | 3428 | char vid_buf[20]; |
3429 | char dst_buf[30]; | |
a37f4598 | 3430 | bool sticky; |
f188e68e AK |
3431 | bool local_inactive = false; |
3432 | bool dp_static = false; | |
3433 | uint32_t nhg_id = 0; | |
d62a17ae | 3434 | |
3435 | ndm = NLMSG_DATA(h); | |
3436 | ||
2853fed6 | 3437 | /* We only process macfdb notifications if EVPN is enabled */ |
3438 | if (!is_evpn_enabled()) | |
3439 | return 0; | |
3440 | ||
4b3f26f4 | 3441 | /* Parse attributes and extract fields of interest. Do basic |
3442 | * validation of the fields. | |
3443 | */ | |
4bcdb608 NA |
3444 | netlink_parse_rtattr_flags(tb, NDA_MAX, NDA_RTA(ndm), len, |
3445 | NLA_F_NESTED); | |
d62a17ae | 3446 | |
3447 | if (!tb[NDA_LLADDR]) { | |
28bd0652 | 3448 | if (IS_ZEBRA_DEBUG_KERNEL) |
4b3f26f4 | 3449 | zlog_debug("%s AF_BRIDGE IF %u - no LLADDR", |
28bd0652 | 3450 | nl_msg_type_to_str(h->nlmsg_type), |
4b3f26f4 | 3451 | ndm->ndm_ifindex); |
d62a17ae | 3452 | return 0; |
3453 | } | |
3454 | ||
ff8b7eb8 | 3455 | if (RTA_PAYLOAD(tb[NDA_LLADDR]) != ETH_ALEN) { |
28bd0652 DS |
3456 | if (IS_ZEBRA_DEBUG_KERNEL) |
3457 | zlog_debug( | |
4b3f26f4 | 3458 | "%s AF_BRIDGE IF %u - LLADDR is not MAC, len %lu", |
3459 | nl_msg_type_to_str(h->nlmsg_type), ndm->ndm_ifindex, | |
28bd0652 | 3460 | (unsigned long)RTA_PAYLOAD(tb[NDA_LLADDR])); |
d62a17ae | 3461 | return 0; |
3462 | } | |
3463 | ||
ff8b7eb8 | 3464 | memcpy(&mac, RTA_DATA(tb[NDA_LLADDR]), ETH_ALEN); |
d62a17ae | 3465 | |
2be18df4 | 3466 | if (tb[NDA_VLAN]) { |
d62a17ae | 3467 | vid_present = 1; |
d7c0a89a | 3468 | vid = *(uint16_t *)RTA_DATA(tb[NDA_VLAN]); |
772270f3 | 3469 | snprintf(vid_buf, sizeof(vid_buf), " VLAN %u", vid); |
d62a17ae | 3470 | } |
3471 | ||
3472 | if (tb[NDA_DST]) { | |
3473 | /* TODO: Only IPv4 supported now. */ | |
3474 | dst_present = 1; | |
4b3f26f4 | 3475 | memcpy(&vtep_ip.s_addr, RTA_DATA(tb[NDA_DST]), |
d62a17ae | 3476 | IPV4_MAX_BYTELEN); |
9bcef951 MS |
3477 | snprintfrr(dst_buf, sizeof(dst_buf), " dst %pI4", |
3478 | &vtep_ip); | |
d62a17ae | 3479 | } |
3480 | ||
f188e68e AK |
3481 | if (tb[NDA_NH_ID]) |
3482 | nhg_id = *(uint32_t *)RTA_DATA(tb[NDA_NH_ID]); | |
3483 | ||
3484 | if (ndm->ndm_state & NUD_STALE) | |
3485 | local_inactive = true; | |
3486 | ||
4bcdb608 NA |
3487 | if (tb[NDA_FDB_EXT_ATTRS]) { |
3488 | struct rtattr *attr = tb[NDA_FDB_EXT_ATTRS]; | |
3489 | struct rtattr *nfea_tb[NFEA_MAX + 1] = {0}; | |
3490 | ||
3491 | netlink_parse_rtattr_nested(nfea_tb, NFEA_MAX, attr); | |
3492 | if (nfea_tb[NFEA_ACTIVITY_NOTIFY]) { | |
3493 | uint8_t nfy_flags; | |
f188e68e | 3494 | |
4bcdb608 NA |
3495 | nfy_flags = *(uint8_t *)RTA_DATA( |
3496 | nfea_tb[NFEA_ACTIVITY_NOTIFY]); | |
3497 | if (nfy_flags & FDB_NOTIFY_BIT) | |
3498 | dp_static = true; | |
3499 | if (nfy_flags & FDB_NOTIFY_INACTIVE_BIT) | |
3500 | local_inactive = true; | |
3501 | } | |
f188e68e AK |
3502 | } |
3503 | ||
d62a17ae | 3504 | if (IS_ZEBRA_DEBUG_KERNEL) |
ef7b8be4 | 3505 | zlog_debug("Rx %s AF_BRIDGE IF %u%s st 0x%x fl 0x%x MAC %pEA%s nhg %d", |
d62a17ae | 3506 | nl_msg_type_to_str(h->nlmsg_type), |
d62a17ae | 3507 | ndm->ndm_ifindex, vid_present ? vid_buf : "", |
ef7b8be4 | 3508 | ndm->ndm_state, ndm->ndm_flags, &mac, |
f188e68e | 3509 | dst_present ? dst_buf : "", nhg_id); |
d62a17ae | 3510 | |
4b3f26f4 | 3511 | /* The interface should exist. */ |
3512 | ifp = if_lookup_by_index_per_ns(zebra_ns_lookup(ns_id), | |
3513 | ndm->ndm_ifindex); | |
3514 | if (!ifp || !ifp->info) | |
3515 | return 0; | |
3516 | ||
3517 | /* The interface should be something we're interested in. */ | |
3518 | if (!IS_ZEBRA_IF_BRIDGE_SLAVE(ifp)) | |
3519 | return 0; | |
3520 | ||
3521 | zif = (struct zebra_if *)ifp->info; | |
3522 | if ((br_if = zif->brslave_info.br_if) == NULL) { | |
3523 | if (IS_ZEBRA_DEBUG_KERNEL) | |
3524 | zlog_debug( | |
3525 | "%s AF_BRIDGE IF %s(%u) brIF %u - no bridge master", | |
3526 | nl_msg_type_to_str(h->nlmsg_type), ifp->name, | |
3527 | ndm->ndm_ifindex, | |
3528 | zif->brslave_info.bridge_ifindex); | |
3529 | return 0; | |
3530 | } | |
3531 | ||
f188e68e | 3532 | sticky = !!(ndm->ndm_flags & NTF_STICKY); |
4b3f26f4 | 3533 | |
28bd0652 DS |
3534 | if (filter_vlan && vid != filter_vlan) { |
3535 | if (IS_ZEBRA_DEBUG_KERNEL) | |
d6951e5e | 3536 | zlog_debug(" Filtered due to filter vlan: %d", |
28bd0652 | 3537 | filter_vlan); |
d62a17ae | 3538 | return 0; |
28bd0652 | 3539 | } |
d62a17ae | 3540 | |
3541 | /* If add or update, do accordingly if learnt on a "local" interface; if | |
3542 | * the notification is over VxLAN, this has to be related to | |
3543 | * multi-homing, | |
3544 | * so perform an implicit delete of any local entry (if it exists). | |
3545 | */ | |
3546 | if (h->nlmsg_type == RTM_NEWNEIGH) { | |
4b3f26f4 | 3547 | /* Drop "permanent" entries. */ |
3548 | if (ndm->ndm_state & NUD_PERMANENT) { | |
3549 | if (IS_ZEBRA_DEBUG_KERNEL) | |
d6951e5e DL |
3550 | zlog_debug( |
3551 | " Dropping entry because of NUD_PERMANENT"); | |
3552 | return 0; | |
4b3f26f4 | 3553 | } |
3554 | ||
d62a17ae | 3555 | if (IS_ZEBRA_IF_VXLAN(ifp)) |
15400f95 AK |
3556 | return zebra_vxlan_dp_network_mac_add( |
3557 | ifp, br_if, &mac, vid, nhg_id, sticky, | |
3558 | !!(ndm->ndm_flags & NTF_EXT_LEARNED)); | |
d62a17ae | 3559 | |
3560 | return zebra_vxlan_local_mac_add_update(ifp, br_if, &mac, vid, | |
f188e68e | 3561 | sticky, local_inactive, dp_static); |
d62a17ae | 3562 | } |
3563 | ||
3564 | /* This is a delete notification. | |
4b3f26f4 | 3565 | * Ignore the notification with IP dest as it may just signify that the |
3566 | * MAC has moved from remote to local. The exception is the special | |
3567 | * all-zeros MAC that represents the BUM flooding entry; we may have | |
3568 | * to readd it. Otherwise, | |
d62a17ae | 3569 | * 1. For a MAC over VxLan, check if it needs to be refreshed(readded) |
3570 | * 2. For a MAC over "local" interface, delete the mac | |
3571 | * Note: We will get notifications from both bridge driver and VxLAN | |
3572 | * driver. | |
d62a17ae | 3573 | */ |
f188e68e AK |
3574 | if (nhg_id) |
3575 | return 0; | |
3576 | ||
28bd0652 | 3577 | if (dst_present) { |
4b3f26f4 | 3578 | u_char zero_mac[6] = {0x0, 0x0, 0x0, 0x0, 0x0, 0x0}; |
3579 | ||
3580 | if (!memcmp(zero_mac, mac.octet, ETH_ALEN)) | |
3581 | return zebra_vxlan_check_readd_vtep(ifp, vtep_ip); | |
d62a17ae | 3582 | return 0; |
28bd0652 | 3583 | } |
d62a17ae | 3584 | |
3585 | if (IS_ZEBRA_IF_VXLAN(ifp)) | |
15400f95 | 3586 | return zebra_vxlan_dp_network_mac_del(ifp, br_if, &mac, vid); |
d62a17ae | 3587 | |
3588 | return zebra_vxlan_local_mac_del(ifp, br_if, &mac, vid); | |
2232a77c | 3589 | } |
3590 | ||
2414abd3 | 3591 | static int netlink_macfdb_table(struct nlmsghdr *h, ns_id_t ns_id, int startup) |
2232a77c | 3592 | { |
d62a17ae | 3593 | int len; |
3594 | struct ndmsg *ndm; | |
2232a77c | 3595 | |
d62a17ae | 3596 | if (h->nlmsg_type != RTM_NEWNEIGH) |
3597 | return 0; | |
2232a77c | 3598 | |
d62a17ae | 3599 | /* Length validity. */ |
3600 | len = h->nlmsg_len - NLMSG_LENGTH(sizeof(struct ndmsg)); | |
3601 | if (len < 0) | |
3602 | return -1; | |
2232a77c | 3603 | |
d62a17ae | 3604 | /* We are interested only in AF_BRIDGE notifications. */ |
3605 | ndm = NLMSG_DATA(h); | |
3606 | if (ndm->ndm_family != AF_BRIDGE) | |
3607 | return 0; | |
2232a77c | 3608 | |
2414abd3 | 3609 | return netlink_macfdb_change(h, len, ns_id); |
2232a77c | 3610 | } |
3611 | ||
3612 | /* Request for MAC FDB information from the kernel */ | |
85a75f1e MS |
3613 | static int netlink_request_macs(struct nlsock *netlink_cmd, int family, |
3614 | int type, ifindex_t master_ifindex) | |
2232a77c | 3615 | { |
d62a17ae | 3616 | struct { |
3617 | struct nlmsghdr n; | |
3618 | struct ifinfomsg ifm; | |
3619 | char buf[256]; | |
3620 | } req; | |
3621 | ||
3622 | /* Form the request, specifying filter (rtattr) if needed. */ | |
3623 | memset(&req, 0, sizeof(req)); | |
3624 | req.n.nlmsg_type = type; | |
718f9b0f | 3625 | req.n.nlmsg_flags = NLM_F_ROOT | NLM_F_MATCH | NLM_F_REQUEST; |
d62a17ae | 3626 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg)); |
3627 | req.ifm.ifi_family = family; | |
3628 | if (master_ifindex) | |
312a6bee | 3629 | nl_attr_put32(&req.n, sizeof(req), IFLA_MASTER, master_ifindex); |
d62a17ae | 3630 | |
fd3f8e52 | 3631 | return netlink_request(netlink_cmd, &req); |
2232a77c | 3632 | } |
3633 | ||
3634 | /* | |
3635 | * MAC forwarding database read using netlink interface. This is invoked | |
3636 | * at startup. | |
3637 | */ | |
d62a17ae | 3638 | int netlink_macfdb_read(struct zebra_ns *zns) |
2232a77c | 3639 | { |
d62a17ae | 3640 | int ret; |
85a75f1e MS |
3641 | struct zebra_dplane_info dp_info; |
3642 | ||
3643 | zebra_dplane_info_from_zns(&dp_info, zns, true /*is_cmd*/); | |
d62a17ae | 3644 | |
3645 | /* Get bridge FDB table. */ | |
85a75f1e MS |
3646 | ret = netlink_request_macs(&zns->netlink_cmd, AF_BRIDGE, RTM_GETNEIGH, |
3647 | 0); | |
d62a17ae | 3648 | if (ret < 0) |
3649 | return ret; | |
3650 | /* We are reading entire table. */ | |
3651 | filter_vlan = 0; | |
85a75f1e | 3652 | ret = netlink_parse_info(netlink_macfdb_table, &zns->netlink_cmd, |
9bfadae8 | 3653 | &dp_info, 0, true); |
d62a17ae | 3654 | |
3655 | return ret; | |
2232a77c | 3656 | } |
3657 | ||
3658 | /* | |
3659 | * MAC forwarding database read using netlink interface. This is for a | |
3660 | * specific bridge and matching specific access VLAN (if VLAN-aware bridge). | |
3661 | */ | |
d62a17ae | 3662 | int netlink_macfdb_read_for_bridge(struct zebra_ns *zns, struct interface *ifp, |
3663 | struct interface *br_if) | |
2232a77c | 3664 | { |
d62a17ae | 3665 | struct zebra_if *br_zif; |
3666 | struct zebra_if *zif; | |
3667 | struct zebra_l2info_vxlan *vxl; | |
85a75f1e | 3668 | struct zebra_dplane_info dp_info; |
d62a17ae | 3669 | int ret = 0; |
3670 | ||
85a75f1e | 3671 | zebra_dplane_info_from_zns(&dp_info, zns, true /*is_cmd*/); |
d62a17ae | 3672 | |
3673 | /* Save VLAN we're filtering on, if needed. */ | |
3674 | br_zif = (struct zebra_if *)br_if->info; | |
3675 | zif = (struct zebra_if *)ifp->info; | |
3676 | vxl = &zif->l2info.vxl; | |
3677 | if (IS_ZEBRA_IF_BRIDGE_VLAN_AWARE(br_zif)) | |
3678 | filter_vlan = vxl->access_vlan; | |
3679 | ||
3680 | /* Get bridge FDB table for specific bridge - we do the VLAN filtering. | |
3681 | */ | |
85a75f1e | 3682 | ret = netlink_request_macs(&zns->netlink_cmd, AF_BRIDGE, RTM_GETNEIGH, |
d62a17ae | 3683 | br_if->ifindex); |
3684 | if (ret < 0) | |
3685 | return ret; | |
85a75f1e | 3686 | ret = netlink_parse_info(netlink_macfdb_table, &zns->netlink_cmd, |
9bfadae8 | 3687 | &dp_info, 0, false); |
d62a17ae | 3688 | |
3689 | /* Reset VLAN filter. */ | |
3690 | filter_vlan = 0; | |
3691 | return ret; | |
2232a77c | 3692 | } |
3693 | ||
67fb9374 CS |
3694 | |
3695 | /* Request for MAC FDB for a specific MAC address in VLAN from the kernel */ | |
3696 | static int netlink_request_specific_mac_in_bridge(struct zebra_ns *zns, | |
1a3bd37f | 3697 | int family, int type, |
67fb9374 | 3698 | struct interface *br_if, |
1a3bd37f | 3699 | const struct ethaddr *mac, |
67fb9374 CS |
3700 | vlanid_t vid) |
3701 | { | |
3702 | struct { | |
3703 | struct nlmsghdr n; | |
3704 | struct ndmsg ndm; | |
3705 | char buf[256]; | |
3706 | } req; | |
3707 | struct zebra_if *br_zif; | |
67fb9374 CS |
3708 | |
3709 | memset(&req, 0, sizeof(req)); | |
3710 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)); | |
3711 | req.n.nlmsg_type = type; /* RTM_GETNEIGH */ | |
3712 | req.n.nlmsg_flags = NLM_F_REQUEST; | |
3713 | req.ndm.ndm_family = family; /* AF_BRIDGE */ | |
3714 | /* req.ndm.ndm_state = NUD_REACHABLE; */ | |
3715 | ||
312a6bee | 3716 | nl_attr_put(&req.n, sizeof(req), NDA_LLADDR, mac, 6); |
67fb9374 CS |
3717 | |
3718 | br_zif = (struct zebra_if *)br_if->info; | |
3719 | if (IS_ZEBRA_IF_BRIDGE_VLAN_AWARE(br_zif) && vid > 0) | |
312a6bee | 3720 | nl_attr_put16(&req.n, sizeof(req), NDA_VLAN, vid); |
67fb9374 | 3721 | |
312a6bee | 3722 | nl_attr_put32(&req.n, sizeof(req), NDA_MASTER, br_if->ifindex); |
67fb9374 CS |
3723 | |
3724 | if (IS_ZEBRA_DEBUG_KERNEL) | |
bd47f3a3 | 3725 | zlog_debug( |
ef7b8be4 | 3726 | "%s: Tx family %s IF %s(%u) vrf %s(%u) MAC %pEA vid %u", |
bd47f3a3 | 3727 | __func__, nl_family_to_str(req.ndm.ndm_family), |
096f7609 IR |
3728 | br_if->name, br_if->ifindex, br_if->vrf->name, |
3729 | br_if->vrf->vrf_id, mac, vid); | |
67fb9374 | 3730 | |
fd3f8e52 | 3731 | return netlink_request(&zns->netlink_cmd, &req); |
67fb9374 CS |
3732 | } |
3733 | ||
3734 | int netlink_macfdb_read_specific_mac(struct zebra_ns *zns, | |
3735 | struct interface *br_if, | |
1a3bd37f | 3736 | const struct ethaddr *mac, vlanid_t vid) |
67fb9374 CS |
3737 | { |
3738 | int ret = 0; | |
3739 | struct zebra_dplane_info dp_info; | |
3740 | ||
3741 | zebra_dplane_info_from_zns(&dp_info, zns, true /*is_cmd*/); | |
3742 | ||
3743 | /* Get bridge FDB table for specific bridge - we do the VLAN filtering. | |
3744 | */ | |
3745 | ret = netlink_request_specific_mac_in_bridge(zns, AF_BRIDGE, | |
3746 | RTM_GETNEIGH, | |
3747 | br_if, mac, vid); | |
3748 | if (ret < 0) | |
3749 | return ret; | |
3750 | ||
3751 | ret = netlink_parse_info(netlink_macfdb_table, &zns->netlink_cmd, | |
9bfadae8 | 3752 | &dp_info, 1, false); |
67fb9374 CS |
3753 | |
3754 | return ret; | |
3755 | } | |
036d93c0 MS |
3756 | |
3757 | /* | |
3758 | * Netlink-specific handler for MAC updates using dataplane context object. | |
3759 | */ | |
67e3369e JU |
3760 | ssize_t netlink_macfdb_update_ctx(struct zebra_dplane_ctx *ctx, void *data, |
3761 | size_t datalen) | |
2232a77c | 3762 | { |
340845e2 | 3763 | struct ipaddr vtep_ip; |
036d93c0 | 3764 | vlanid_t vid; |
d4d4ec1c RZ |
3765 | ssize_t total; |
3766 | int cmd; | |
340845e2 JU |
3767 | uint8_t flags; |
3768 | uint16_t state; | |
506efd37 | 3769 | uint32_t nhg_id; |
f188e68e AK |
3770 | uint32_t update_flags; |
3771 | bool nfy = false; | |
3772 | uint8_t nfy_flags = 0; | |
88217099 PG |
3773 | int proto = RTPROT_ZEBRA; |
3774 | ||
3775 | if (dplane_ctx_get_type(ctx) != 0) | |
3776 | proto = zebra2proto(dplane_ctx_get_type(ctx)); | |
d4d4ec1c RZ |
3777 | |
3778 | cmd = dplane_ctx_get_op(ctx) == DPLANE_OP_MAC_INSTALL | |
3779 | ? RTM_NEWNEIGH : RTM_DELNEIGH; | |
036d93c0 | 3780 | |
f188e68e | 3781 | flags = NTF_MASTER; |
340845e2 | 3782 | state = NUD_REACHABLE; |
d62a17ae | 3783 | |
f188e68e AK |
3784 | update_flags = dplane_ctx_mac_get_update_flags(ctx); |
3785 | if (update_flags & DPLANE_MAC_REMOTE) { | |
3786 | flags |= NTF_SELF; | |
60e372e9 AK |
3787 | if (dplane_ctx_mac_is_sticky(ctx)) { |
3788 | /* NUD_NOARP prevents the entry from expiring */ | |
3789 | state |= NUD_NOARP; | |
3790 | /* sticky the entry from moving */ | |
f188e68e | 3791 | flags |= NTF_STICKY; |
60e372e9 | 3792 | } else { |
f188e68e | 3793 | flags |= NTF_EXT_LEARNED; |
60e372e9 | 3794 | } |
f188e68e AK |
3795 | /* if it was static-local previously we need to clear the |
3796 | * notify flags on replace with remote | |
3797 | */ | |
3798 | if (update_flags & DPLANE_MAC_WAS_STATIC) | |
3799 | nfy = true; | |
3800 | } else { | |
3801 | /* local mac */ | |
3802 | if (update_flags & DPLANE_MAC_SET_STATIC) { | |
4bcdb608 | 3803 | nfy_flags |= FDB_NOTIFY_BIT; |
f188e68e AK |
3804 | state |= NUD_NOARP; |
3805 | } | |
3806 | ||
3807 | if (update_flags & DPLANE_MAC_SET_INACTIVE) | |
4bcdb608 | 3808 | nfy_flags |= FDB_NOTIFY_INACTIVE_BIT; |
f188e68e AK |
3809 | |
3810 | nfy = true; | |
3811 | } | |
478566d6 | 3812 | |
506efd37 | 3813 | nhg_id = dplane_ctx_mac_get_nhg_id(ctx); |
340845e2 JU |
3814 | vtep_ip.ipaddr_v4 = *(dplane_ctx_mac_get_vtep_ip(ctx)); |
3815 | SET_IPADDR_V4(&vtep_ip); | |
d62a17ae | 3816 | |
036d93c0 | 3817 | if (IS_ZEBRA_DEBUG_KERNEL) { |
478566d6 | 3818 | char vid_buf[20]; |
506efd37 | 3819 | const struct ethaddr *mac = dplane_ctx_mac_get_addr(ctx); |
478566d6 | 3820 | |
340845e2 JU |
3821 | vid = dplane_ctx_mac_get_vlan(ctx); |
3822 | if (vid > 0) | |
478566d6 MS |
3823 | snprintf(vid_buf, sizeof(vid_buf), " VLAN %u", vid); |
3824 | else | |
3825 | vid_buf[0] = '\0'; | |
036d93c0 | 3826 | |
ccd187cd | 3827 | zlog_debug( |
ef7b8be4 | 3828 | "Tx %s family %s IF %s(%u)%s %sMAC %pEA dst %pIA nhg %u%s%s%s%s%s", |
ccd187cd AK |
3829 | nl_msg_type_to_str(cmd), nl_family_to_str(AF_BRIDGE), |
3830 | dplane_ctx_get_ifname(ctx), dplane_ctx_get_ifindex(ctx), | |
3831 | vid_buf, dplane_ctx_mac_is_sticky(ctx) ? "sticky " : "", | |
ef7b8be4 | 3832 | mac, &vtep_ip, nhg_id, |
ccd187cd AK |
3833 | (update_flags & DPLANE_MAC_REMOTE) ? " rem" : "", |
3834 | (update_flags & DPLANE_MAC_WAS_STATIC) ? " clr_sync" | |
3835 | : "", | |
3836 | (update_flags & DPLANE_MAC_SET_STATIC) ? " static" : "", | |
3837 | (update_flags & DPLANE_MAC_SET_INACTIVE) ? " inactive" | |
3838 | : "", | |
3839 | nfy ? " nfy" : ""); | |
036d93c0 | 3840 | } |
d62a17ae | 3841 | |
0be6e7d7 | 3842 | total = netlink_neigh_update_msg_encode( |
0a27a2fe PG |
3843 | ctx, cmd, (const void *)dplane_ctx_mac_get_addr(ctx), ETH_ALEN, |
3844 | &vtep_ip, true, AF_BRIDGE, 0, flags, state, nhg_id, nfy, | |
3845 | nfy_flags, false /*ext*/, 0 /*ext_flags*/, data, datalen, | |
88217099 | 3846 | proto); |
d4d4ec1c RZ |
3847 | |
3848 | return total; | |
2232a77c | 3849 | } |
3850 | ||
f17b99ed DS |
3851 | /* |
3852 | * In the event the kernel deletes ipv4 link-local neighbor entries created for | |
3853 | * 5549 support, re-install them. | |
3854 | */ | |
3855 | static void netlink_handle_5549(struct ndmsg *ndm, struct zebra_if *zif, | |
9b036974 DS |
3856 | struct interface *ifp, struct ipaddr *ip, |
3857 | bool handle_failed) | |
f17b99ed DS |
3858 | { |
3859 | if (ndm->ndm_family != AF_INET) | |
3860 | return; | |
3861 | ||
3862 | if (!zif->v6_2_v4_ll_neigh_entry) | |
3863 | return; | |
3864 | ||
3865 | if (ipv4_ll.s_addr != ip->ip._v4_addr.s_addr) | |
3866 | return; | |
3867 | ||
9b036974 DS |
3868 | if (handle_failed && ndm->ndm_state & NUD_FAILED) { |
3869 | zlog_info("Neighbor Entry for %s has entered a failed state, not reinstalling", | |
3870 | ifp->name); | |
3871 | return; | |
3872 | } | |
3873 | ||
f17b99ed DS |
3874 | if_nbr_ipv6ll_to_ipv4ll_neigh_update(ifp, &zif->v6_2_v4_ll_addr6, true); |
3875 | } | |
3876 | ||
d62a17ae | 3877 | #define NUD_VALID \ |
3878 | (NUD_PERMANENT | NUD_NOARP | NUD_REACHABLE | NUD_PROBE | NUD_STALE \ | |
3879 | | NUD_DELAY) | |
f188e68e AK |
3880 | #define NUD_LOCAL_ACTIVE \ |
3881 | (NUD_PERMANENT | NUD_NOARP | NUD_REACHABLE) | |
2232a77c | 3882 | |
80f6b5fa PG |
3883 | static int netlink_nbr_entry_state_to_zclient(int nbr_state) |
3884 | { | |
3885 | /* an exact match is done between | |
3886 | * - netlink neighbor state values: NDM_XXX (see in linux/neighbour.h) | |
3887 | * - zclient neighbor state values: ZEBRA_NEIGH_STATE_XXX | |
3888 | * (see in lib/zclient.h) | |
3889 | */ | |
3890 | return nbr_state; | |
3891 | } | |
2414abd3 | 3892 | static int netlink_ipneigh_change(struct nlmsghdr *h, int len, ns_id_t ns_id) |
2232a77c | 3893 | { |
d62a17ae | 3894 | struct ndmsg *ndm; |
3895 | struct interface *ifp; | |
3896 | struct zebra_if *zif; | |
d62a17ae | 3897 | struct rtattr *tb[NDA_MAX + 1]; |
3898 | struct interface *link_if; | |
3899 | struct ethaddr mac; | |
3900 | struct ipaddr ip; | |
3901 | char buf[ETHER_ADDR_STRLEN]; | |
d62a17ae | 3902 | int mac_present = 0; |
a37f4598 | 3903 | bool is_ext; |
3904 | bool is_router; | |
f188e68e | 3905 | bool local_inactive; |
7c0e4dc6 AK |
3906 | uint32_t ext_flags = 0; |
3907 | bool dp_static = false; | |
7723e8d3 PG |
3908 | int l2_len = 0; |
3909 | int cmd; | |
d62a17ae | 3910 | |
3911 | ndm = NLMSG_DATA(h); | |
3912 | ||
3913 | /* The interface should exist. */ | |
5895d33f | 3914 | ifp = if_lookup_by_index_per_ns(zebra_ns_lookup(ns_id), |
d62a17ae | 3915 | ndm->ndm_ifindex); |
2853fed6 | 3916 | if (!ifp || !ifp->info) |
d62a17ae | 3917 | return 0; |
3918 | ||
20089ae2 DS |
3919 | zif = (struct zebra_if *)ifp->info; |
3920 | ||
3921 | /* Parse attributes and extract fields of interest. */ | |
20089ae2 DS |
3922 | netlink_parse_rtattr(tb, NDA_MAX, NDA_RTA(ndm), len); |
3923 | ||
3924 | if (!tb[NDA_DST]) { | |
bd47f3a3 | 3925 | zlog_debug("%s family %s IF %s(%u) vrf %s(%u) - no DST", |
9df414fe QY |
3926 | nl_msg_type_to_str(h->nlmsg_type), |
3927 | nl_family_to_str(ndm->ndm_family), ifp->name, | |
096f7609 | 3928 | ndm->ndm_ifindex, ifp->vrf->name, ifp->vrf->vrf_id); |
d62a17ae | 3929 | return 0; |
20089ae2 DS |
3930 | } |
3931 | ||
6006b807 | 3932 | memset(&ip, 0, sizeof(ip)); |
20089ae2 DS |
3933 | ip.ipa_type = (ndm->ndm_family == AF_INET) ? IPADDR_V4 : IPADDR_V6; |
3934 | memcpy(&ip.ip.addr, RTA_DATA(tb[NDA_DST]), RTA_PAYLOAD(tb[NDA_DST])); | |
3935 | ||
f17b99ed DS |
3936 | /* if kernel deletes our rfc5549 neighbor entry, re-install it */ |
3937 | if (h->nlmsg_type == RTM_DELNEIGH && (ndm->ndm_state & NUD_PERMANENT)) { | |
9b036974 | 3938 | netlink_handle_5549(ndm, zif, ifp, &ip, false); |
28bd0652 DS |
3939 | if (IS_ZEBRA_DEBUG_KERNEL) |
3940 | zlog_debug( | |
1d5453d6 | 3941 | " Neighbor Entry Received is a 5549 entry, finished"); |
20089ae2 DS |
3942 | return 0; |
3943 | } | |
d62a17ae | 3944 | |
f17b99ed | 3945 | /* if kernel marks our rfc5549 neighbor entry invalid, re-install it */ |
9b036974 DS |
3946 | if (h->nlmsg_type == RTM_NEWNEIGH && !(ndm->ndm_state & NUD_VALID)) |
3947 | netlink_handle_5549(ndm, zif, ifp, &ip, true); | |
f17b99ed | 3948 | |
7723e8d3 PG |
3949 | /* we send link layer information to client: |
3950 | * - nlmsg_type = RTM_DELNEIGH|NEWNEIGH|GETNEIGH | |
3951 | * - struct ipaddr ( for DEL and GET) | |
3952 | * - struct ethaddr mac; (for NEW) | |
3953 | */ | |
3954 | if (h->nlmsg_type == RTM_NEWNEIGH) | |
3955 | cmd = ZEBRA_NHRP_NEIGH_ADDED; | |
3956 | else if (h->nlmsg_type == RTM_GETNEIGH) | |
3957 | cmd = ZEBRA_NHRP_NEIGH_GET; | |
3958 | else if (h->nlmsg_type == RTM_DELNEIGH) | |
3959 | cmd = ZEBRA_NHRP_NEIGH_REMOVED; | |
3960 | else { | |
3961 | zlog_debug("%s(): unknown nlmsg type %u", __func__, | |
3962 | h->nlmsg_type); | |
3963 | return 0; | |
3964 | } | |
3965 | if (tb[NDA_LLADDR]) { | |
3966 | /* copy LLADDR information */ | |
3967 | l2_len = RTA_PAYLOAD(tb[NDA_LLADDR]); | |
7723e8d3 | 3968 | } |
d603c077 PG |
3969 | if (l2_len == IPV4_MAX_BYTELEN || l2_len == 0) { |
3970 | union sockunion link_layer_ipv4; | |
3971 | ||
3972 | if (l2_len) { | |
3973 | sockunion_family(&link_layer_ipv4) = AF_INET; | |
3974 | memcpy((void *)sockunion_get_addr(&link_layer_ipv4), | |
b7c21fad | 3975 | RTA_DATA(tb[NDA_LLADDR]), l2_len); |
d603c077 PG |
3976 | } else |
3977 | sockunion_family(&link_layer_ipv4) = AF_UNSPEC; | |
80f6b5fa PG |
3978 | zsend_nhrp_neighbor_notify( |
3979 | cmd, ifp, &ip, | |
3980 | netlink_nbr_entry_state_to_zclient(ndm->ndm_state), | |
3981 | &link_layer_ipv4); | |
d603c077 | 3982 | } |
7723e8d3 PG |
3983 | |
3984 | if (h->nlmsg_type == RTM_GETNEIGH) | |
3985 | return 0; | |
3986 | ||
d62a17ae | 3987 | /* The neighbor is present on an SVI. From this, we locate the |
3988 | * underlying | |
3989 | * bridge because we're only interested in neighbors on a VxLAN bridge. | |
3990 | * The bridge is located based on the nature of the SVI: | |
3991 | * (a) In the case of a VLAN-aware bridge, the SVI is a L3 VLAN | |
3992 | * interface | |
3993 | * and is linked to the bridge | |
3994 | * (b) In the case of a VLAN-unaware bridge, the SVI is the bridge | |
3819e4ce | 3995 | * interface |
d62a17ae | 3996 | * itself |
3997 | */ | |
3998 | if (IS_ZEBRA_IF_VLAN(ifp)) { | |
5895d33f | 3999 | link_if = if_lookup_by_index_per_ns(zebra_ns_lookup(ns_id), |
71349e03 | 4000 | zif->link_ifindex); |
d62a17ae | 4001 | if (!link_if) |
4002 | return 0; | |
4003 | } else if (IS_ZEBRA_IF_BRIDGE(ifp)) | |
4004 | link_if = ifp; | |
28bd0652 | 4005 | else { |
4cf4fad1 | 4006 | link_if = NULL; |
28bd0652 DS |
4007 | if (IS_ZEBRA_DEBUG_KERNEL) |
4008 | zlog_debug( | |
1d5453d6 | 4009 | " Neighbor Entry received is not on a VLAN or a BRIDGE, ignoring"); |
28bd0652 | 4010 | } |
d62a17ae | 4011 | |
6006b807 | 4012 | memset(&mac, 0, sizeof(mac)); |
d62a17ae | 4013 | if (h->nlmsg_type == RTM_NEWNEIGH) { |
4014 | if (tb[NDA_LLADDR]) { | |
ff8b7eb8 | 4015 | if (RTA_PAYLOAD(tb[NDA_LLADDR]) != ETH_ALEN) { |
28bd0652 DS |
4016 | if (IS_ZEBRA_DEBUG_KERNEL) |
4017 | zlog_debug( | |
bd47f3a3 | 4018 | "%s family %s IF %s(%u) vrf %s(%u) - LLADDR is not MAC, len %lu", |
28bd0652 DS |
4019 | nl_msg_type_to_str( |
4020 | h->nlmsg_type), | |
4021 | nl_family_to_str( | |
4022 | ndm->ndm_family), | |
4023 | ifp->name, ndm->ndm_ifindex, | |
096f7609 IR |
4024 | ifp->vrf->name, |
4025 | ifp->vrf->vrf_id, | |
28bd0652 DS |
4026 | (unsigned long)RTA_PAYLOAD( |
4027 | tb[NDA_LLADDR])); | |
d62a17ae | 4028 | return 0; |
4029 | } | |
4030 | ||
4031 | mac_present = 1; | |
ff8b7eb8 | 4032 | memcpy(&mac, RTA_DATA(tb[NDA_LLADDR]), ETH_ALEN); |
d62a17ae | 4033 | } |
4034 | ||
a37f4598 | 4035 | is_ext = !!(ndm->ndm_flags & NTF_EXT_LEARNED); |
4036 | is_router = !!(ndm->ndm_flags & NTF_ROUTER); | |
d62a17ae | 4037 | |
7c0e4dc6 AK |
4038 | if (tb[NDA_EXT_FLAGS]) { |
4039 | ext_flags = *(uint32_t *)RTA_DATA(tb[NDA_EXT_FLAGS]); | |
4040 | if (ext_flags & NTF_E_MH_PEER_SYNC) | |
4041 | dp_static = true; | |
4042 | } | |
4043 | ||
d62a17ae | 4044 | if (IS_ZEBRA_DEBUG_KERNEL) |
4045 | zlog_debug( | |
ef7b8be4 | 4046 | "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 | 4047 | nl_msg_type_to_str(h->nlmsg_type), |
4048 | nl_family_to_str(ndm->ndm_family), ifp->name, | |
096f7609 IR |
4049 | ndm->ndm_ifindex, ifp->vrf->name, |
4050 | ifp->vrf->vrf_id, &ip, | |
d62a17ae | 4051 | mac_present |
4052 | ? prefix_mac2str(&mac, buf, sizeof(buf)) | |
4053 | : "", | |
7c0e4dc6 | 4054 | ndm->ndm_state, ndm->ndm_flags, ext_flags); |
d62a17ae | 4055 | |
4056 | /* If the neighbor state is valid for use, process as an add or | |
4057 | * update | |
4058 | * else process as a delete. Note that the delete handling may | |
4059 | * result | |
4060 | * in re-adding the neighbor if it is a valid "remote" neighbor. | |
4061 | */ | |
f188e68e | 4062 | if (ndm->ndm_state & NUD_VALID) { |
c7bfd085 AK |
4063 | if (zebra_evpn_mh_do_adv_reachable_neigh_only()) |
4064 | local_inactive = | |
4065 | !(ndm->ndm_state & NUD_LOCAL_ACTIVE); | |
4066 | else | |
4067 | /* If EVPN-MH is not enabled we treat STALE | |
4068 | * neighbors as locally-active and advertise | |
4069 | * them | |
4070 | */ | |
4071 | local_inactive = false; | |
f188e68e | 4072 | |
4cf4fad1 AK |
4073 | /* Add local neighbors to the l3 interface database */ |
4074 | if (is_ext) | |
4075 | zebra_neigh_del(ifp, &ip); | |
4076 | else | |
4077 | zebra_neigh_add(ifp, &ip, &mac); | |
4078 | ||
4079 | if (link_if) | |
4080 | zebra_vxlan_handle_kernel_neigh_update( | |
4081 | ifp, link_if, &ip, &mac, ndm->ndm_state, | |
4082 | is_ext, is_router, local_inactive, | |
4083 | dp_static); | |
4084 | return 0; | |
f188e68e | 4085 | } |
d62a17ae | 4086 | |
4cf4fad1 AK |
4087 | |
4088 | zebra_neigh_del(ifp, &ip); | |
4089 | if (link_if) | |
4090 | zebra_vxlan_handle_kernel_neigh_del(ifp, link_if, &ip); | |
4091 | return 0; | |
d62a17ae | 4092 | } |
4093 | ||
4094 | if (IS_ZEBRA_DEBUG_KERNEL) | |
ef7b8be4 | 4095 | zlog_debug("Rx %s family %s IF %s(%u) vrf %s(%u) IP %pIA", |
d62a17ae | 4096 | nl_msg_type_to_str(h->nlmsg_type), |
4097 | nl_family_to_str(ndm->ndm_family), ifp->name, | |
096f7609 | 4098 | ndm->ndm_ifindex, ifp->vrf->name, ifp->vrf->vrf_id, |
ef7b8be4 | 4099 | &ip); |
d62a17ae | 4100 | |
4101 | /* Process the delete - it may result in re-adding the neighbor if it is | |
4102 | * a valid "remote" neighbor. | |
4103 | */ | |
4cf4fad1 AK |
4104 | zebra_neigh_del(ifp, &ip); |
4105 | if (link_if) | |
4106 | zebra_vxlan_handle_kernel_neigh_del(ifp, link_if, &ip); | |
4107 | ||
4108 | return 0; | |
2232a77c | 4109 | } |
4110 | ||
2414abd3 | 4111 | static int netlink_neigh_table(struct nlmsghdr *h, ns_id_t ns_id, int startup) |
2232a77c | 4112 | { |
d62a17ae | 4113 | int len; |
4114 | struct ndmsg *ndm; | |
2232a77c | 4115 | |
d62a17ae | 4116 | if (h->nlmsg_type != RTM_NEWNEIGH) |
4117 | return 0; | |
2232a77c | 4118 | |
d62a17ae | 4119 | /* Length validity. */ |
4120 | len = h->nlmsg_len - NLMSG_LENGTH(sizeof(struct ndmsg)); | |
4121 | if (len < 0) | |
4122 | return -1; | |
2232a77c | 4123 | |
d62a17ae | 4124 | /* We are interested only in AF_INET or AF_INET6 notifications. */ |
4125 | ndm = NLMSG_DATA(h); | |
4126 | if (ndm->ndm_family != AF_INET && ndm->ndm_family != AF_INET6) | |
4127 | return 0; | |
2232a77c | 4128 | |
2414abd3 | 4129 | return netlink_neigh_change(h, len); |
2232a77c | 4130 | } |
4131 | ||
4132 | /* Request for IP neighbor information from the kernel */ | |
85a75f1e MS |
4133 | static int netlink_request_neigh(struct nlsock *netlink_cmd, int family, |
4134 | int type, ifindex_t ifindex) | |
2232a77c | 4135 | { |
d62a17ae | 4136 | struct { |
4137 | struct nlmsghdr n; | |
4138 | struct ndmsg ndm; | |
4139 | char buf[256]; | |
4140 | } req; | |
4141 | ||
4142 | /* Form the request, specifying filter (rtattr) if needed. */ | |
4143 | memset(&req, 0, sizeof(req)); | |
4144 | req.n.nlmsg_type = type; | |
718f9b0f | 4145 | req.n.nlmsg_flags = NLM_F_ROOT | NLM_F_MATCH | NLM_F_REQUEST; |
d62a17ae | 4146 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)); |
4147 | req.ndm.ndm_family = family; | |
4148 | if (ifindex) | |
312a6bee | 4149 | nl_attr_put32(&req.n, sizeof(req), NDA_IFINDEX, ifindex); |
d62a17ae | 4150 | |
fd3f8e52 | 4151 | return netlink_request(netlink_cmd, &req); |
2232a77c | 4152 | } |
4153 | ||
4154 | /* | |
4155 | * IP Neighbor table read using netlink interface. This is invoked | |
4156 | * at startup. | |
4157 | */ | |
d62a17ae | 4158 | int netlink_neigh_read(struct zebra_ns *zns) |
2232a77c | 4159 | { |
d62a17ae | 4160 | int ret; |
85a75f1e MS |
4161 | struct zebra_dplane_info dp_info; |
4162 | ||
4163 | zebra_dplane_info_from_zns(&dp_info, zns, true /*is_cmd*/); | |
2232a77c | 4164 | |
d62a17ae | 4165 | /* Get IP neighbor table. */ |
85a75f1e MS |
4166 | ret = netlink_request_neigh(&zns->netlink_cmd, AF_UNSPEC, RTM_GETNEIGH, |
4167 | 0); | |
d62a17ae | 4168 | if (ret < 0) |
4169 | return ret; | |
85a75f1e | 4170 | ret = netlink_parse_info(netlink_neigh_table, &zns->netlink_cmd, |
9bfadae8 | 4171 | &dp_info, 0, true); |
2232a77c | 4172 | |
d62a17ae | 4173 | return ret; |
2232a77c | 4174 | } |
4175 | ||
4176 | /* | |
4177 | * IP Neighbor table read using netlink interface. This is for a specific | |
4178 | * VLAN device. | |
4179 | */ | |
d62a17ae | 4180 | int netlink_neigh_read_for_vlan(struct zebra_ns *zns, struct interface *vlan_if) |
2232a77c | 4181 | { |
d62a17ae | 4182 | int ret = 0; |
85a75f1e MS |
4183 | struct zebra_dplane_info dp_info; |
4184 | ||
4185 | zebra_dplane_info_from_zns(&dp_info, zns, true /*is_cmd*/); | |
2232a77c | 4186 | |
85a75f1e | 4187 | ret = netlink_request_neigh(&zns->netlink_cmd, AF_UNSPEC, RTM_GETNEIGH, |
d62a17ae | 4188 | vlan_if->ifindex); |
4189 | if (ret < 0) | |
4190 | return ret; | |
85a75f1e | 4191 | ret = netlink_parse_info(netlink_neigh_table, &zns->netlink_cmd, |
9bfadae8 | 4192 | &dp_info, 0, false); |
2232a77c | 4193 | |
d62a17ae | 4194 | return ret; |
2232a77c | 4195 | } |
4196 | ||
67fb9374 CS |
4197 | /* |
4198 | * Request for a specific IP in VLAN (SVI) device from IP Neighbor table, | |
4199 | * read using netlink interface. | |
4200 | */ | |
4201 | static int netlink_request_specific_neigh_in_vlan(struct zebra_ns *zns, | |
1a3bd37f MS |
4202 | int type, |
4203 | const struct ipaddr *ip, | |
67fb9374 CS |
4204 | ifindex_t ifindex) |
4205 | { | |
4206 | struct { | |
4207 | struct nlmsghdr n; | |
4208 | struct ndmsg ndm; | |
4209 | char buf[256]; | |
4210 | } req; | |
4211 | int ipa_len; | |
4212 | ||
4213 | /* Form the request, specifying filter (rtattr) if needed. */ | |
4214 | memset(&req, 0, sizeof(req)); | |
4215 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)); | |
4216 | req.n.nlmsg_flags = NLM_F_REQUEST; | |
4217 | req.n.nlmsg_type = type; /* RTM_GETNEIGH */ | |
4218 | req.ndm.ndm_ifindex = ifindex; | |
4219 | ||
4220 | if (IS_IPADDR_V4(ip)) { | |
4221 | ipa_len = IPV4_MAX_BYTELEN; | |
4222 | req.ndm.ndm_family = AF_INET; | |
4223 | ||
4224 | } else { | |
4225 | ipa_len = IPV6_MAX_BYTELEN; | |
4226 | req.ndm.ndm_family = AF_INET6; | |
4227 | } | |
4228 | ||
312a6bee | 4229 | nl_attr_put(&req.n, sizeof(req), NDA_DST, &ip->ip.addr, ipa_len); |
67fb9374 | 4230 | |
ef7b8be4 DL |
4231 | if (IS_ZEBRA_DEBUG_KERNEL) |
4232 | zlog_debug("%s: Tx %s family %s IF %u IP %pIA flags 0x%x", | |
7c26c121 | 4233 | __func__, nl_msg_type_to_str(type), |
ef7b8be4 DL |
4234 | nl_family_to_str(req.ndm.ndm_family), ifindex, ip, |
4235 | req.n.nlmsg_flags); | |
7c26c121 | 4236 | |
fd3f8e52 | 4237 | return netlink_request(&zns->netlink_cmd, &req); |
67fb9374 CS |
4238 | } |
4239 | ||
1a3bd37f MS |
4240 | int netlink_neigh_read_specific_ip(const struct ipaddr *ip, |
4241 | struct interface *vlan_if) | |
67fb9374 CS |
4242 | { |
4243 | int ret = 0; | |
4244 | struct zebra_ns *zns; | |
096f7609 | 4245 | struct zebra_vrf *zvrf = vlan_if->vrf->info; |
67fb9374 CS |
4246 | struct zebra_dplane_info dp_info; |
4247 | ||
4248 | zns = zvrf->zns; | |
4249 | ||
4250 | zebra_dplane_info_from_zns(&dp_info, zns, true /*is_cmd*/); | |
4251 | ||
4252 | if (IS_ZEBRA_DEBUG_KERNEL) | |
ef7b8be4 DL |
4253 | zlog_debug("%s: neigh request IF %s(%u) IP %pIA vrf %s(%u)", |
4254 | __func__, vlan_if->name, vlan_if->ifindex, ip, | |
096f7609 | 4255 | vlan_if->vrf->name, vlan_if->vrf->vrf_id); |
67fb9374 CS |
4256 | |
4257 | ret = netlink_request_specific_neigh_in_vlan(zns, RTM_GETNEIGH, ip, | |
4258 | vlan_if->ifindex); | |
4259 | if (ret < 0) | |
4260 | return ret; | |
4261 | ||
4262 | ret = netlink_parse_info(netlink_neigh_table, &zns->netlink_cmd, | |
9bfadae8 | 4263 | &dp_info, 1, false); |
67fb9374 CS |
4264 | |
4265 | return ret; | |
4266 | } | |
4267 | ||
2414abd3 | 4268 | int netlink_neigh_change(struct nlmsghdr *h, ns_id_t ns_id) |
2232a77c | 4269 | { |
d62a17ae | 4270 | int len; |
4271 | struct ndmsg *ndm; | |
2232a77c | 4272 | |
7723e8d3 PG |
4273 | if (!(h->nlmsg_type == RTM_NEWNEIGH || h->nlmsg_type == RTM_DELNEIGH |
4274 | || h->nlmsg_type == RTM_GETNEIGH)) | |
d62a17ae | 4275 | return 0; |
2232a77c | 4276 | |
d62a17ae | 4277 | /* Length validity. */ |
4278 | len = h->nlmsg_len - NLMSG_LENGTH(sizeof(struct ndmsg)); | |
9bdf8618 | 4279 | if (len < 0) { |
15569c58 DA |
4280 | zlog_err( |
4281 | "%s: Message received from netlink is of a broken size %d %zu", | |
4282 | __func__, h->nlmsg_len, | |
4283 | (size_t)NLMSG_LENGTH(sizeof(struct ndmsg))); | |
d62a17ae | 4284 | return -1; |
9bdf8618 | 4285 | } |
2232a77c | 4286 | |
d62a17ae | 4287 | /* Is this a notification for the MAC FDB or IP neighbor table? */ |
4288 | ndm = NLMSG_DATA(h); | |
4289 | if (ndm->ndm_family == AF_BRIDGE) | |
2414abd3 | 4290 | return netlink_macfdb_change(h, len, ns_id); |
2232a77c | 4291 | |
d62a17ae | 4292 | if (ndm->ndm_type != RTN_UNICAST) |
4293 | return 0; | |
2232a77c | 4294 | |
d62a17ae | 4295 | if (ndm->ndm_family == AF_INET || ndm->ndm_family == AF_INET6) |
2414abd3 | 4296 | return netlink_ipneigh_change(h, len, ns_id); |
8a1b681c | 4297 | else { |
9df414fe | 4298 | flog_warn( |
e914ccbe | 4299 | EC_ZEBRA_UNKNOWN_FAMILY, |
87b5d1b0 DS |
4300 | "Invalid address family: %u received from kernel neighbor change: %s", |
4301 | ndm->ndm_family, nl_msg_type_to_str(h->nlmsg_type)); | |
8a1b681c SW |
4302 | return 0; |
4303 | } | |
2232a77c | 4304 | |
d62a17ae | 4305 | return 0; |
2232a77c | 4306 | } |
4307 | ||
931fa60c MS |
4308 | /* |
4309 | * Utility neighbor-update function, using info from dplane context. | |
4310 | */ | |
67e3369e JU |
4311 | static ssize_t netlink_neigh_update_ctx(const struct zebra_dplane_ctx *ctx, |
4312 | int cmd, void *buf, size_t buflen) | |
2232a77c | 4313 | { |
931fa60c | 4314 | const struct ipaddr *ip; |
0a27a2fe PG |
4315 | const struct ethaddr *mac = NULL; |
4316 | const struct ipaddr *link_ip = NULL; | |
4317 | const void *link_ptr = NULL; | |
4318 | char buf2[ETHER_ADDR_STRLEN]; | |
4319 | ||
4320 | int llalen; | |
931fa60c MS |
4321 | uint8_t flags; |
4322 | uint16_t state; | |
340845e2 | 4323 | uint8_t family; |
ccd187cd AK |
4324 | uint32_t update_flags; |
4325 | uint32_t ext_flags = 0; | |
4326 | bool ext = false; | |
88217099 PG |
4327 | int proto = RTPROT_ZEBRA; |
4328 | ||
4329 | if (dplane_ctx_get_type(ctx) != 0) | |
4330 | proto = zebra2proto(dplane_ctx_get_type(ctx)); | |
d62a17ae | 4331 | |
931fa60c | 4332 | ip = dplane_ctx_neigh_get_ipaddr(ctx); |
931fa60c | 4333 | |
0a27a2fe PG |
4334 | if (dplane_ctx_get_op(ctx) == DPLANE_OP_NEIGH_IP_INSTALL |
4335 | || dplane_ctx_get_op(ctx) == DPLANE_OP_NEIGH_IP_DELETE) { | |
4336 | link_ip = dplane_ctx_neigh_get_link_ip(ctx); | |
4337 | llalen = IPADDRSZ(link_ip); | |
4338 | link_ptr = (const void *)&(link_ip->ip.addr); | |
4339 | ipaddr2str(link_ip, buf2, sizeof(buf2)); | |
4340 | } else { | |
4341 | mac = dplane_ctx_neigh_get_mac(ctx); | |
4342 | llalen = ETH_ALEN; | |
4343 | link_ptr = (const void *)mac; | |
4344 | if (is_zero_mac(mac)) | |
4345 | mac = NULL; | |
4346 | if (mac) | |
4347 | prefix_mac2str(mac, buf2, sizeof(buf2)); | |
4348 | else | |
4349 | snprintf(buf2, sizeof(buf2), "null"); | |
4350 | } | |
ccd187cd | 4351 | update_flags = dplane_ctx_neigh_get_update_flags(ctx); |
931fa60c MS |
4352 | flags = neigh_flags_to_netlink(dplane_ctx_neigh_get_flags(ctx)); |
4353 | state = neigh_state_to_netlink(dplane_ctx_neigh_get_state(ctx)); | |
4354 | ||
340845e2 | 4355 | family = IS_IPADDR_V4(ip) ? AF_INET : AF_INET6; |
d62a17ae | 4356 | |
ccd187cd AK |
4357 | if (update_flags & DPLANE_NEIGH_REMOTE) { |
4358 | flags |= NTF_EXT_LEARNED; | |
4359 | /* if it was static-local previously we need to clear the | |
4360 | * ext flags on replace with remote | |
4361 | */ | |
4362 | if (update_flags & DPLANE_NEIGH_WAS_STATIC) | |
4363 | ext = true; | |
0a27a2fe | 4364 | } else if (!(update_flags & DPLANE_NEIGH_NO_EXTENSION)) { |
ccd187cd AK |
4365 | ext = true; |
4366 | /* local neigh */ | |
4367 | if (update_flags & DPLANE_NEIGH_SET_STATIC) | |
4368 | ext_flags |= NTF_E_MH_PEER_SYNC; | |
ccd187cd | 4369 | } |
ef7b8be4 | 4370 | if (IS_ZEBRA_DEBUG_KERNEL) |
340845e2 | 4371 | zlog_debug( |
0a27a2fe | 4372 | "Tx %s family %s IF %s(%u) Neigh %pIA %s %s flags 0x%x state 0x%x %sext_flags 0x%x", |
340845e2 JU |
4373 | nl_msg_type_to_str(cmd), nl_family_to_str(family), |
4374 | dplane_ctx_get_ifname(ctx), dplane_ctx_get_ifindex(ctx), | |
0a27a2fe PG |
4375 | ip, link_ip ? "Link " : "MAC ", buf2, flags, state, |
4376 | ext ? "ext " : "", ext_flags); | |
d62a17ae | 4377 | |
18f60fe9 | 4378 | return netlink_neigh_update_msg_encode( |
0a27a2fe PG |
4379 | ctx, cmd, link_ptr, llalen, ip, true, family, RTN_UNICAST, |
4380 | flags, state, 0 /*nhg*/, false /*nfy*/, 0 /*nfy_flags*/, ext, | |
88217099 | 4381 | ext_flags, buf, buflen, proto); |
2232a77c | 4382 | } |
4383 | ||
e18747a9 PG |
4384 | static int netlink_neigh_table_update_ctx(const struct zebra_dplane_ctx *ctx, |
4385 | void *data, size_t datalen) | |
4386 | { | |
4387 | struct { | |
4388 | struct nlmsghdr n; | |
4389 | struct ndtmsg ndtm; | |
4390 | char buf[]; | |
4391 | } *req = data; | |
4392 | struct rtattr *nest; | |
4393 | uint8_t family; | |
4394 | ifindex_t idx; | |
4395 | uint32_t val; | |
4396 | ||
4397 | if (datalen < sizeof(*req)) | |
4398 | return 0; | |
4399 | memset(req, 0, sizeof(*req)); | |
4400 | family = dplane_ctx_neightable_get_family(ctx); | |
4401 | idx = dplane_ctx_get_ifindex(ctx); | |
4402 | ||
4403 | req->n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndtmsg)); | |
4404 | req->n.nlmsg_flags = NLM_F_REQUEST | NLM_F_REPLACE; | |
4405 | req->n.nlmsg_type = RTM_SETNEIGHTBL; | |
4406 | req->ndtm.ndtm_family = family; | |
4407 | ||
4408 | nl_attr_put(&req->n, datalen, NDTA_NAME, | |
4409 | family == AF_INET ? "arp_cache" : "ndisc_cache", 10); | |
4410 | nest = nl_attr_nest(&req->n, datalen, NDTA_PARMS); | |
4411 | if (nest == NULL) | |
4412 | return 0; | |
4413 | if (!nl_attr_put(&req->n, datalen, NDTPA_IFINDEX, &idx, sizeof(idx))) | |
4414 | return 0; | |
4415 | val = dplane_ctx_neightable_get_app_probes(ctx); | |
4416 | if (!nl_attr_put(&req->n, datalen, NDTPA_APP_PROBES, &val, sizeof(val))) | |
4417 | return 0; | |
4418 | val = dplane_ctx_neightable_get_mcast_probes(ctx); | |
4419 | if (!nl_attr_put(&req->n, datalen, NDTPA_MCAST_PROBES, &val, | |
4420 | sizeof(val))) | |
4421 | return 0; | |
4422 | val = dplane_ctx_neightable_get_ucast_probes(ctx); | |
4423 | if (!nl_attr_put(&req->n, datalen, NDTPA_UCAST_PROBES, &val, | |
4424 | sizeof(val))) | |
4425 | return 0; | |
4426 | nl_attr_nest_end(&req->n, nest); | |
4427 | ||
4428 | return NLMSG_ALIGN(req->n.nlmsg_len); | |
4429 | } | |
4430 | ||
67e3369e JU |
4431 | static ssize_t netlink_neigh_msg_encoder(struct zebra_dplane_ctx *ctx, |
4432 | void *buf, size_t buflen) | |
2232a77c | 4433 | { |
67e3369e | 4434 | ssize_t ret; |
2232a77c | 4435 | |
931fa60c MS |
4436 | switch (dplane_ctx_get_op(ctx)) { |
4437 | case DPLANE_OP_NEIGH_INSTALL: | |
4438 | case DPLANE_OP_NEIGH_UPDATE: | |
d68e74b4 | 4439 | case DPLANE_OP_NEIGH_DISCOVER: |
0a27a2fe | 4440 | case DPLANE_OP_NEIGH_IP_INSTALL: |
67e3369e | 4441 | ret = netlink_neigh_update_ctx(ctx, RTM_NEWNEIGH, buf, buflen); |
931fa60c MS |
4442 | break; |
4443 | case DPLANE_OP_NEIGH_DELETE: | |
0a27a2fe | 4444 | case DPLANE_OP_NEIGH_IP_DELETE: |
67e3369e | 4445 | ret = netlink_neigh_update_ctx(ctx, RTM_DELNEIGH, buf, buflen); |
931fa60c | 4446 | break; |
0bbd4ff4 | 4447 | case DPLANE_OP_VTEP_ADD: |
67e3369e JU |
4448 | ret = netlink_vxlan_flood_update_ctx(ctx, RTM_NEWNEIGH, buf, |
4449 | buflen); | |
0bbd4ff4 MS |
4450 | break; |
4451 | case DPLANE_OP_VTEP_DELETE: | |
67e3369e JU |
4452 | ret = netlink_vxlan_flood_update_ctx(ctx, RTM_DELNEIGH, buf, |
4453 | buflen); | |
0bbd4ff4 | 4454 | break; |
e18747a9 PG |
4455 | case DPLANE_OP_NEIGH_TABLE_UPDATE: |
4456 | ret = netlink_neigh_table_update_ctx(ctx, buf, buflen); | |
4457 | break; | |
931fa60c | 4458 | default: |
67e3369e | 4459 | ret = -1; |
931fa60c | 4460 | } |
2232a77c | 4461 | |
67e3369e JU |
4462 | return ret; |
4463 | } | |
4464 | ||
4465 | /* | |
4466 | * Update MAC, using dataplane context object. | |
4467 | */ | |
4468 | ||
67e3369e JU |
4469 | enum netlink_msg_status netlink_put_mac_update_msg(struct nl_batch *bth, |
4470 | struct zebra_dplane_ctx *ctx) | |
4471 | { | |
4472 | return netlink_batch_add_msg(bth, ctx, netlink_macfdb_update_ctx, | |
4473 | false); | |
4474 | } | |
4475 | ||
67e3369e JU |
4476 | enum netlink_msg_status |
4477 | netlink_put_neigh_update_msg(struct nl_batch *bth, struct zebra_dplane_ctx *ctx) | |
4478 | { | |
4479 | return netlink_batch_add_msg(bth, ctx, netlink_neigh_msg_encoder, | |
4480 | false); | |
6fe2b0e6 CS |
4481 | } |
4482 | ||
16c628de MS |
4483 | /* |
4484 | * MPLS label forwarding table change via netlink interface, using dataplane | |
4485 | * context information. | |
4486 | */ | |
0be6e7d7 JU |
4487 | ssize_t netlink_mpls_multipath_msg_encode(int cmd, struct zebra_dplane_ctx *ctx, |
4488 | void *buf, size_t buflen) | |
16c628de MS |
4489 | { |
4490 | mpls_lse_t lse; | |
ee70f629 | 4491 | const struct nhlfe_list_head *head; |
f2595bd5 | 4492 | const struct zebra_nhlfe *nhlfe; |
16c628de MS |
4493 | struct nexthop *nexthop = NULL; |
4494 | unsigned int nexthop_num; | |
4495 | const char *routedesc; | |
4496 | int route_type; | |
9a0132a5 | 4497 | struct prefix p = {0}; |
d4000d7b DS |
4498 | struct nlsock *nl = |
4499 | kernel_netlink_nlsock_lookup(dplane_ctx_get_ns_sock(ctx)); | |
16c628de MS |
4500 | |
4501 | struct { | |
4502 | struct nlmsghdr n; | |
4503 | struct rtmsg r; | |
0be6e7d7 JU |
4504 | char buf[0]; |
4505 | } *req = buf; | |
4506 | ||
4507 | if (buflen < sizeof(*req)) | |
4508 | return 0; | |
16c628de | 4509 | |
0be6e7d7 | 4510 | memset(req, 0, sizeof(*req)); |
16c628de MS |
4511 | |
4512 | /* | |
4513 | * Count # nexthops so we can decide whether to use singlepath | |
4514 | * or multipath case. | |
4515 | */ | |
4516 | nexthop_num = 0; | |
ee70f629 MS |
4517 | head = dplane_ctx_get_nhlfe_list(ctx); |
4518 | frr_each(nhlfe_list_const, head, nhlfe) { | |
16c628de MS |
4519 | nexthop = nhlfe->nexthop; |
4520 | if (!nexthop) | |
4521 | continue; | |
4522 | if (cmd == RTM_NEWROUTE) { | |
4523 | /* Count all selected NHLFEs */ | |
4524 | if (CHECK_FLAG(nhlfe->flags, NHLFE_FLAG_SELECTED) | |
4525 | && CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE)) | |
4526 | nexthop_num++; | |
4527 | } else { /* DEL */ | |
4528 | /* Count all installed NHLFEs */ | |
4529 | if (CHECK_FLAG(nhlfe->flags, NHLFE_FLAG_INSTALLED) | |
4530 | && CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB)) | |
4531 | nexthop_num++; | |
4532 | } | |
4533 | } | |
4534 | ||
4535 | if ((nexthop_num == 0) || | |
4536 | (!dplane_ctx_get_best_nhlfe(ctx) && (cmd != RTM_DELROUTE))) | |
4537 | return 0; | |
4538 | ||
0be6e7d7 JU |
4539 | req->n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)); |
4540 | req->n.nlmsg_flags = NLM_F_CREATE | NLM_F_REQUEST; | |
4541 | req->n.nlmsg_type = cmd; | |
d4000d7b | 4542 | req->n.nlmsg_pid = nl->snl.nl_pid; |
16c628de | 4543 | |
0be6e7d7 JU |
4544 | req->r.rtm_family = AF_MPLS; |
4545 | req->r.rtm_table = RT_TABLE_MAIN; | |
4546 | req->r.rtm_dst_len = MPLS_LABEL_LEN_BITS; | |
4547 | req->r.rtm_scope = RT_SCOPE_UNIVERSE; | |
4548 | req->r.rtm_type = RTN_UNICAST; | |
16c628de MS |
4549 | |
4550 | if (cmd == RTM_NEWROUTE) { | |
4551 | /* We do a replace to handle update. */ | |
0be6e7d7 | 4552 | req->n.nlmsg_flags |= NLM_F_REPLACE; |
16c628de MS |
4553 | |
4554 | /* set the protocol value if installing */ | |
4555 | route_type = re_type_from_lsp_type( | |
4556 | dplane_ctx_get_best_nhlfe(ctx)->type); | |
0be6e7d7 | 4557 | req->r.rtm_protocol = zebra2proto(route_type); |
16c628de MS |
4558 | } |
4559 | ||
4560 | /* Fill destination */ | |
4561 | lse = mpls_lse_encode(dplane_ctx_get_in_label(ctx), 0, 0, 1); | |
0be6e7d7 JU |
4562 | if (!nl_attr_put(&req->n, buflen, RTA_DST, &lse, sizeof(mpls_lse_t))) |
4563 | return 0; | |
16c628de MS |
4564 | |
4565 | /* Fill nexthops (paths) based on single-path or multipath. The paths | |
4566 | * chosen depend on the operation. | |
4567 | */ | |
fc608372 | 4568 | if (nexthop_num == 1) { |
16c628de MS |
4569 | routedesc = "single-path"; |
4570 | _netlink_mpls_debug(cmd, dplane_ctx_get_in_label(ctx), | |
4571 | routedesc); | |
4572 | ||
4573 | nexthop_num = 0; | |
ee70f629 | 4574 | frr_each(nhlfe_list_const, head, nhlfe) { |
16c628de MS |
4575 | nexthop = nhlfe->nexthop; |
4576 | if (!nexthop) | |
4577 | continue; | |
4578 | ||
4579 | if ((cmd == RTM_NEWROUTE | |
4580 | && (CHECK_FLAG(nhlfe->flags, NHLFE_FLAG_SELECTED) | |
4581 | && CHECK_FLAG(nexthop->flags, | |
4582 | NEXTHOP_FLAG_ACTIVE))) | |
4583 | || (cmd == RTM_DELROUTE | |
4584 | && (CHECK_FLAG(nhlfe->flags, | |
4585 | NHLFE_FLAG_INSTALLED) | |
4586 | && CHECK_FLAG(nexthop->flags, | |
4587 | NEXTHOP_FLAG_FIB)))) { | |
4588 | /* Add the gateway */ | |
0be6e7d7 JU |
4589 | if (!_netlink_mpls_build_singlepath( |
4590 | &p, routedesc, nhlfe, &req->n, | |
4591 | &req->r, buflen, cmd)) | |
4592 | return false; | |
16c628de MS |
4593 | |
4594 | nexthop_num++; | |
4595 | break; | |
4596 | } | |
4597 | } | |
4598 | } else { /* Multipath case */ | |
312a6bee | 4599 | struct rtattr *nest; |
81793ac1 | 4600 | const union g_addr *src1 = NULL; |
16c628de | 4601 | |
0be6e7d7 JU |
4602 | nest = nl_attr_nest(&req->n, buflen, RTA_MULTIPATH); |
4603 | if (!nest) | |
4604 | return 0; | |
16c628de MS |
4605 | |
4606 | routedesc = "multipath"; | |
4607 | _netlink_mpls_debug(cmd, dplane_ctx_get_in_label(ctx), | |
4608 | routedesc); | |
4609 | ||
4610 | nexthop_num = 0; | |
ee70f629 | 4611 | frr_each(nhlfe_list_const, head, nhlfe) { |
16c628de MS |
4612 | nexthop = nhlfe->nexthop; |
4613 | if (!nexthop) | |
4614 | continue; | |
4615 | ||
16c628de MS |
4616 | if ((cmd == RTM_NEWROUTE |
4617 | && (CHECK_FLAG(nhlfe->flags, NHLFE_FLAG_SELECTED) | |
4618 | && CHECK_FLAG(nexthop->flags, | |
4619 | NEXTHOP_FLAG_ACTIVE))) | |
4620 | || (cmd == RTM_DELROUTE | |
4621 | && (CHECK_FLAG(nhlfe->flags, | |
4622 | NHLFE_FLAG_INSTALLED) | |
4623 | && CHECK_FLAG(nexthop->flags, | |
4624 | NEXTHOP_FLAG_FIB)))) { | |
4625 | nexthop_num++; | |
4626 | ||
4627 | /* Build the multipath */ | |
0be6e7d7 JU |
4628 | if (!_netlink_mpls_build_multipath( |
4629 | &p, routedesc, nhlfe, &req->n, | |
4630 | buflen, &req->r, &src1)) | |
4631 | return 0; | |
16c628de MS |
4632 | } |
4633 | } | |
4634 | ||
4635 | /* Add the multipath */ | |
0be6e7d7 | 4636 | nl_attr_nest_end(&req->n, nest); |
16c628de MS |
4637 | } |
4638 | ||
0be6e7d7 | 4639 | return NLMSG_ALIGN(req->n.nlmsg_len); |
16c628de | 4640 | } |
506efd37 AK |
4641 | |
4642 | /**************************************************************************** | |
4643 | * This code was developed in a branch that didn't have dplane APIs for | |
4644 | * MAC updates. Hence the use of the legacy style. It will be moved to | |
4645 | * the new dplane style pre-merge to master. XXX | |
4646 | */ | |
4647 | static int netlink_fdb_nh_update(uint32_t nh_id, struct in_addr vtep_ip) | |
4648 | { | |
4649 | struct { | |
4650 | struct nlmsghdr n; | |
4651 | struct nhmsg nhm; | |
4652 | char buf[256]; | |
4653 | } req; | |
4654 | int cmd = RTM_NEWNEXTHOP; | |
4655 | struct zebra_vrf *zvrf; | |
4656 | struct zebra_ns *zns; | |
4657 | ||
4658 | zvrf = zebra_vrf_get_evpn(); | |
506efd37 AK |
4659 | zns = zvrf->zns; |
4660 | ||
4661 | memset(&req, 0, sizeof(req)); | |
4662 | ||
4663 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct nhmsg)); | |
4664 | req.n.nlmsg_flags = NLM_F_REQUEST; | |
4665 | req.n.nlmsg_flags |= (NLM_F_CREATE | NLM_F_REPLACE); | |
4666 | req.n.nlmsg_type = cmd; | |
4667 | req.nhm.nh_family = AF_INET; | |
4668 | ||
4669 | if (!nl_attr_put32(&req.n, sizeof(req), NHA_ID, nh_id)) | |
4670 | return -1; | |
4671 | if (!nl_attr_put(&req.n, sizeof(req), NHA_FDB, NULL, 0)) | |
4672 | return -1; | |
4673 | if (!nl_attr_put(&req.n, sizeof(req), NHA_GATEWAY, | |
4674 | &vtep_ip, IPV4_MAX_BYTELEN)) | |
4675 | return -1; | |
4676 | ||
4677 | if (IS_ZEBRA_DEBUG_KERNEL || IS_ZEBRA_DEBUG_EVPN_MH_NH) { | |
9bcef951 MS |
4678 | zlog_debug("Tx %s fdb-nh 0x%x %pI4", |
4679 | nl_msg_type_to_str(cmd), nh_id, &vtep_ip); | |
506efd37 AK |
4680 | } |
4681 | ||
4682 | return netlink_talk(netlink_talk_filter, &req.n, &zns->netlink_cmd, zns, | |
9bfadae8 | 4683 | false); |
506efd37 AK |
4684 | } |
4685 | ||
4686 | static int netlink_fdb_nh_del(uint32_t nh_id) | |
4687 | { | |
4688 | struct { | |
4689 | struct nlmsghdr n; | |
4690 | struct nhmsg nhm; | |
4691 | char buf[256]; | |
4692 | } req; | |
4693 | int cmd = RTM_DELNEXTHOP; | |
4694 | struct zebra_vrf *zvrf; | |
4695 | struct zebra_ns *zns; | |
4696 | ||
4697 | zvrf = zebra_vrf_get_evpn(); | |
506efd37 AK |
4698 | zns = zvrf->zns; |
4699 | ||
4700 | memset(&req, 0, sizeof(req)); | |
4701 | ||
4702 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct nhmsg)); | |
4703 | req.n.nlmsg_flags = NLM_F_REQUEST; | |
4704 | req.n.nlmsg_type = cmd; | |
4705 | req.nhm.nh_family = AF_UNSPEC; | |
4706 | ||
4707 | if (!nl_attr_put32(&req.n, sizeof(req), NHA_ID, nh_id)) | |
4708 | return -1; | |
4709 | ||
4710 | if (IS_ZEBRA_DEBUG_KERNEL || IS_ZEBRA_DEBUG_EVPN_MH_NH) { | |
4711 | zlog_debug("Tx %s fdb-nh 0x%x", | |
4712 | nl_msg_type_to_str(cmd), nh_id); | |
4713 | } | |
4714 | ||
4715 | return netlink_talk(netlink_talk_filter, &req.n, &zns->netlink_cmd, zns, | |
9bfadae8 | 4716 | false); |
506efd37 AK |
4717 | } |
4718 | ||
4719 | static int netlink_fdb_nhg_update(uint32_t nhg_id, uint32_t nh_cnt, | |
4720 | struct nh_grp *nh_ids) | |
4721 | { | |
4722 | struct { | |
4723 | struct nlmsghdr n; | |
4724 | struct nhmsg nhm; | |
4725 | char buf[256]; | |
4726 | } req; | |
4727 | int cmd = RTM_NEWNEXTHOP; | |
4728 | struct zebra_vrf *zvrf; | |
4729 | struct zebra_ns *zns; | |
4730 | struct nexthop_grp grp[nh_cnt]; | |
4731 | uint32_t i; | |
4732 | ||
4733 | zvrf = zebra_vrf_get_evpn(); | |
506efd37 AK |
4734 | zns = zvrf->zns; |
4735 | ||
4736 | memset(&req, 0, sizeof(req)); | |
4737 | ||
4738 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct nhmsg)); | |
4739 | req.n.nlmsg_flags = NLM_F_REQUEST; | |
4740 | req.n.nlmsg_flags |= (NLM_F_CREATE | NLM_F_REPLACE); | |
4741 | req.n.nlmsg_type = cmd; | |
4742 | req.nhm.nh_family = AF_UNSPEC; | |
4743 | ||
4744 | if (!nl_attr_put32(&req.n, sizeof(req), NHA_ID, nhg_id)) | |
4745 | return -1; | |
4746 | if (!nl_attr_put(&req.n, sizeof(req), NHA_FDB, NULL, 0)) | |
4747 | return -1; | |
4748 | memset(&grp, 0, sizeof(grp)); | |
4749 | for (i = 0; i < nh_cnt; ++i) { | |
4750 | grp[i].id = nh_ids[i].id; | |
4751 | grp[i].weight = nh_ids[i].weight; | |
4752 | } | |
4753 | if (!nl_attr_put(&req.n, sizeof(req), NHA_GROUP, | |
4754 | grp, nh_cnt * sizeof(struct nexthop_grp))) | |
4755 | return -1; | |
4756 | ||
4757 | ||
4758 | if (IS_ZEBRA_DEBUG_KERNEL || IS_ZEBRA_DEBUG_EVPN_MH_NH) { | |
4759 | char vtep_str[ES_VTEP_LIST_STR_SZ]; | |
9e0c2fd1 | 4760 | char nh_buf[16]; |
506efd37 AK |
4761 | |
4762 | vtep_str[0] = '\0'; | |
4763 | for (i = 0; i < nh_cnt; ++i) { | |
9e0c2fd1 | 4764 | snprintf(nh_buf, sizeof(nh_buf), "%u ", |
506efd37 | 4765 | grp[i].id); |
9e0c2fd1 | 4766 | strlcat(vtep_str, nh_buf, sizeof(vtep_str)); |
506efd37 AK |
4767 | } |
4768 | ||
4769 | zlog_debug("Tx %s fdb-nhg 0x%x %s", | |
4770 | nl_msg_type_to_str(cmd), nhg_id, vtep_str); | |
4771 | } | |
4772 | ||
4773 | return netlink_talk(netlink_talk_filter, &req.n, &zns->netlink_cmd, zns, | |
9bfadae8 | 4774 | false); |
506efd37 AK |
4775 | } |
4776 | ||
4777 | static int netlink_fdb_nhg_del(uint32_t nhg_id) | |
4778 | { | |
4779 | return netlink_fdb_nh_del(nhg_id); | |
4780 | } | |
4781 | ||
4782 | int kernel_upd_mac_nh(uint32_t nh_id, struct in_addr vtep_ip) | |
4783 | { | |
4784 | return netlink_fdb_nh_update(nh_id, vtep_ip); | |
4785 | } | |
4786 | ||
4787 | int kernel_del_mac_nh(uint32_t nh_id) | |
4788 | { | |
4789 | return netlink_fdb_nh_del(nh_id); | |
4790 | } | |
4791 | ||
4792 | int kernel_upd_mac_nhg(uint32_t nhg_id, uint32_t nh_cnt, | |
4793 | struct nh_grp *nh_ids) | |
4794 | { | |
4795 | return netlink_fdb_nhg_update(nhg_id, nh_cnt, nh_ids); | |
4796 | } | |
4797 | ||
4798 | int kernel_del_mac_nhg(uint32_t nhg_id) | |
4799 | { | |
4800 | return netlink_fdb_nhg_del(nhg_id); | |
4801 | } | |
4802 | ||
ddfeb486 | 4803 | #endif /* HAVE_NETLINK */ |