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acddc0ed | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
718e3744 | 2 | /* Kernel routing table updates using netlink over GNU/Linux system. |
3 | * Copyright (C) 1997, 98, 99 Kunihiro Ishiguro | |
718e3744 | 4 | */ |
5 | ||
6 | #include <zebra.h> | |
ddfeb486 DL |
7 | |
8 | #ifdef HAVE_NETLINK | |
9 | ||
8689b25a HS |
10 | /* The following definition is to workaround an issue in the Linux kernel |
11 | * header files with redefinition of 'struct in6_addr' in both | |
12 | * netinet/in.h and linux/in6.h. | |
13 | * Reference - https://sourceware.org/ml/libc-alpha/2013-01/msg00599.html | |
14 | */ | |
15 | #define _LINUX_IN6_H | |
16 | ||
8ccc7e80 | 17 | #include <net/if_arp.h> |
ba777396 RW |
18 | #include <linux/lwtunnel.h> |
19 | #include <linux/mpls_iptunnel.h> | |
8689b25a HS |
20 | #include <linux/seg6_iptunnel.h> |
21 | #include <linux/seg6_local.h> | |
ba777396 RW |
22 | #include <linux/neighbour.h> |
23 | #include <linux/rtnetlink.h> | |
d9f5b2f5 | 24 | #include <linux/nexthop.h> |
718e3744 | 25 | |
26 | /* Hack for GNU libc version 2. */ | |
27 | #ifndef MSG_TRUNC | |
28 | #define MSG_TRUNC 0x20 | |
29 | #endif /* MSG_TRUNC */ | |
30 | ||
31 | #include "linklist.h" | |
32 | #include "if.h" | |
33 | #include "log.h" | |
34 | #include "prefix.h" | |
8689b25a HS |
35 | #include "plist.h" |
36 | #include "plist_int.h" | |
718e3744 | 37 | #include "connected.h" |
38 | #include "table.h" | |
26e2ae36 | 39 | #include "memory.h" |
718e3744 | 40 | #include "rib.h" |
24a58196 | 41 | #include "frrevent.h" |
edd7c245 | 42 | #include "privs.h" |
fb018d25 | 43 | #include "nexthop.h" |
78104b9b | 44 | #include "vrf.h" |
5e6a74d8 | 45 | #include "vty.h" |
40c7bdb0 | 46 | #include "mpls.h" |
13d60d35 | 47 | #include "vxlan.h" |
8d03bc50 | 48 | #include "printfrr.h" |
718e3744 | 49 | |
bf094f69 | 50 | #include "zebra/zapi_msg.h" |
fe18ee2d | 51 | #include "zebra/zebra_ns.h" |
7c551956 | 52 | #include "zebra/zebra_vrf.h" |
6621ca86 | 53 | #include "zebra/rt.h" |
718e3744 | 54 | #include "zebra/redistribute.h" |
55 | #include "zebra/interface.h" | |
56 | #include "zebra/debug.h" | |
12f6fb97 | 57 | #include "zebra/rtadv.h" |
567b877d | 58 | #include "zebra/zebra_ptm.h" |
40c7bdb0 | 59 | #include "zebra/zebra_mpls.h" |
1fdc9eae | 60 | #include "zebra/kernel_netlink.h" |
61 | #include "zebra/rt_netlink.h" | |
d9f5b2f5 | 62 | #include "zebra/zebra_nhg.h" |
e3be0432 | 63 | #include "zebra/zebra_mroute.h" |
2232a77c | 64 | #include "zebra/zebra_vxlan.h" |
364fed6b | 65 | #include "zebra/zebra_errors.h" |
506efd37 | 66 | #include "zebra/zebra_evpn_mh.h" |
1d80c209 | 67 | #include "zebra/zebra_trace.h" |
4cf4fad1 | 68 | #include "zebra/zebra_neigh.h" |
e3be0432 | 69 | |
40c7bdb0 | 70 | #ifndef AF_MPLS |
71 | #define AF_MPLS 28 | |
72 | #endif | |
73 | ||
d87ed8d7 AK |
74 | /* Re-defining as I am unable to include <linux/if_bridge.h> which has the |
75 | * UAPI for MAC sync. */ | |
76 | #ifndef _UAPI_LINUX_IF_BRIDGE_H | |
4bcdb608 | 77 | #define BR_SPH_LIST_SIZE 10 |
d87ed8d7 AK |
78 | #endif |
79 | ||
2232a77c | 80 | static vlanid_t filter_vlan = 0; |
81 | ||
7c99d51b MS |
82 | /* We capture whether the current kernel supports nexthop ids; by |
83 | * default, we'll use them if possible. There's also a configuration | |
84 | * available to _disable_ use of kernel nexthops. | |
85 | */ | |
fec211ad | 86 | static bool supports_nh; |
81505946 | 87 | |
d62a17ae | 88 | struct gw_family_t { |
d7c0a89a QY |
89 | uint16_t filler; |
90 | uint16_t family; | |
d62a17ae | 91 | union g_addr gate; |
40c7bdb0 | 92 | }; |
93 | ||
2b64873d DL |
94 | static const char ipv4_ll_buf[16] = "169.254.0.1"; |
95 | static struct in_addr ipv4_ll; | |
8755598a | 96 | |
002e5c43 SW |
97 | /* Is this a ipv4 over ipv6 route? */ |
98 | static bool is_route_v4_over_v6(unsigned char rtm_family, | |
99 | enum nexthop_types_t nexthop_type) | |
100 | { | |
101 | if (rtm_family == AF_INET | |
102 | && (nexthop_type == NEXTHOP_TYPE_IPV6 | |
103 | || nexthop_type == NEXTHOP_TYPE_IPV6_IFINDEX)) | |
104 | return true; | |
105 | ||
106 | return false; | |
107 | } | |
108 | ||
7c99d51b MS |
109 | /* Helper to control use of kernel-level nexthop ids */ |
110 | static bool kernel_nexthops_supported(void) | |
111 | { | |
d982012a SW |
112 | return (supports_nh && !vrf_is_backend_netns() |
113 | && zebra_nhg_kernel_nexthops_enabled()); | |
7c99d51b MS |
114 | } |
115 | ||
6c67f41f SW |
116 | /* |
117 | * Some people may only want to use NHGs created by protos and not | |
118 | * implicitly created by Zebra. This check accounts for that. | |
119 | */ | |
120 | static bool proto_nexthops_only(void) | |
121 | { | |
122 | return zebra_nhg_proto_nexthops_only(); | |
123 | } | |
124 | ||
125 | /* Is this a proto created NHG? */ | |
126 | static bool is_proto_nhg(uint32_t id, int type) | |
127 | { | |
128 | /* If type is available, use it as the source of truth */ | |
129 | if (type) { | |
130 | if (type != ZEBRA_ROUTE_NHG) | |
131 | return true; | |
132 | return false; | |
133 | } | |
134 | ||
54c89c93 | 135 | if (id >= ZEBRA_NHG_PROTO_LOWER) |
6c67f41f SW |
136 | return true; |
137 | ||
138 | return false; | |
139 | } | |
140 | ||
784d88aa SR |
141 | /* Is vni mcast group */ |
142 | static bool is_mac_vni_mcast_group(struct ethaddr *mac, vni_t vni, | |
143 | struct in_addr grp_addr) | |
144 | { | |
145 | if (!vni) | |
146 | return false; | |
147 | ||
148 | if (!is_zero_mac(mac)) | |
149 | return false; | |
150 | ||
151 | if (!IN_MULTICAST(ntohl(grp_addr.s_addr))) | |
152 | return false; | |
153 | ||
154 | return true; | |
155 | } | |
156 | ||
8755598a DS |
157 | /* |
158 | * The ipv4_ll data structure is used for all 5549 | |
159 | * additions to the kernel. Let's figure out the | |
160 | * correct value one time instead for every | |
161 | * install/remove of a 5549 type route | |
162 | */ | |
d62a17ae | 163 | void rt_netlink_init(void) |
8755598a | 164 | { |
d62a17ae | 165 | inet_pton(AF_INET, ipv4_ll_buf, &ipv4_ll); |
8755598a DS |
166 | } |
167 | ||
931fa60c MS |
168 | /* |
169 | * Mapping from dataplane neighbor flags to netlink flags | |
170 | */ | |
171 | static uint8_t neigh_flags_to_netlink(uint8_t dplane_flags) | |
172 | { | |
173 | uint8_t flags = 0; | |
174 | ||
175 | if (dplane_flags & DPLANE_NTF_EXT_LEARNED) | |
176 | flags |= NTF_EXT_LEARNED; | |
177 | if (dplane_flags & DPLANE_NTF_ROUTER) | |
178 | flags |= NTF_ROUTER; | |
d68e74b4 JU |
179 | if (dplane_flags & DPLANE_NTF_USE) |
180 | flags |= NTF_USE; | |
931fa60c MS |
181 | |
182 | return flags; | |
183 | } | |
184 | ||
185 | /* | |
186 | * Mapping from dataplane neighbor state to netlink state | |
187 | */ | |
188 | static uint16_t neigh_state_to_netlink(uint16_t dplane_state) | |
189 | { | |
190 | uint16_t state = 0; | |
191 | ||
192 | if (dplane_state & DPLANE_NUD_REACHABLE) | |
193 | state |= NUD_REACHABLE; | |
194 | if (dplane_state & DPLANE_NUD_STALE) | |
195 | state |= NUD_STALE; | |
196 | if (dplane_state & DPLANE_NUD_NOARP) | |
197 | state |= NUD_NOARP; | |
198 | if (dplane_state & DPLANE_NUD_PROBE) | |
199 | state |= NUD_PROBE; | |
d68e74b4 JU |
200 | if (dplane_state & DPLANE_NUD_INCOMPLETE) |
201 | state |= NUD_INCOMPLETE; | |
0a27a2fe PG |
202 | if (dplane_state & DPLANE_NUD_PERMANENT) |
203 | state |= NUD_PERMANENT; | |
204 | if (dplane_state & DPLANE_NUD_FAILED) | |
205 | state |= NUD_FAILED; | |
931fa60c MS |
206 | |
207 | return state; | |
208 | } | |
209 | ||
210 | ||
6a6d11a3 | 211 | static inline bool is_selfroute(int proto) |
23b1f334 | 212 | { |
d62a17ae | 213 | if ((proto == RTPROT_BGP) || (proto == RTPROT_OSPF) |
d4d71f11 | 214 | || (proto == RTPROT_ZSTATIC) || (proto == RTPROT_ZEBRA) |
d62a17ae | 215 | || (proto == RTPROT_ISIS) || (proto == RTPROT_RIPNG) |
216 | || (proto == RTPROT_NHRP) || (proto == RTPROT_EIGRP) | |
915902cb | 217 | || (proto == RTPROT_LDP) || (proto == RTPROT_BABEL) |
0761368a | 218 | || (proto == RTPROT_RIP) || (proto == RTPROT_SHARP) |
31f937fb SM |
219 | || (proto == RTPROT_PBR) || (proto == RTPROT_OPENFABRIC) |
220 | || (proto == RTPROT_SRTE)) { | |
6a6d11a3 | 221 | return true; |
d62a17ae | 222 | } |
223 | ||
6a6d11a3 | 224 | return false; |
23b1f334 DD |
225 | } |
226 | ||
4a563f27 | 227 | int zebra2proto(int proto) |
23b1f334 | 228 | { |
d62a17ae | 229 | switch (proto) { |
230 | case ZEBRA_ROUTE_BABEL: | |
231 | proto = RTPROT_BABEL; | |
232 | break; | |
233 | case ZEBRA_ROUTE_BGP: | |
234 | proto = RTPROT_BGP; | |
235 | break; | |
236 | case ZEBRA_ROUTE_OSPF: | |
237 | case ZEBRA_ROUTE_OSPF6: | |
238 | proto = RTPROT_OSPF; | |
239 | break; | |
240 | case ZEBRA_ROUTE_STATIC: | |
d4d71f11 | 241 | proto = RTPROT_ZSTATIC; |
d62a17ae | 242 | break; |
243 | case ZEBRA_ROUTE_ISIS: | |
244 | proto = RTPROT_ISIS; | |
245 | break; | |
246 | case ZEBRA_ROUTE_RIP: | |
247 | proto = RTPROT_RIP; | |
248 | break; | |
249 | case ZEBRA_ROUTE_RIPNG: | |
250 | proto = RTPROT_RIPNG; | |
251 | break; | |
252 | case ZEBRA_ROUTE_NHRP: | |
253 | proto = RTPROT_NHRP; | |
254 | break; | |
255 | case ZEBRA_ROUTE_EIGRP: | |
256 | proto = RTPROT_EIGRP; | |
257 | break; | |
258 | case ZEBRA_ROUTE_LDP: | |
259 | proto = RTPROT_LDP; | |
260 | break; | |
8a71d93d DS |
261 | case ZEBRA_ROUTE_SHARP: |
262 | proto = RTPROT_SHARP; | |
263 | break; | |
0761368a DS |
264 | case ZEBRA_ROUTE_PBR: |
265 | proto = RTPROT_PBR; | |
266 | break; | |
da82f6b4 CF |
267 | case ZEBRA_ROUTE_OPENFABRIC: |
268 | proto = RTPROT_OPENFABRIC; | |
269 | break; | |
31f937fb SM |
270 | case ZEBRA_ROUTE_SRTE: |
271 | proto = RTPROT_SRTE; | |
272 | break; | |
a56ec5c0 | 273 | case ZEBRA_ROUTE_TABLE: |
38e40db1 | 274 | case ZEBRA_ROUTE_NHG: |
a56ec5c0 DS |
275 | proto = RTPROT_ZEBRA; |
276 | break; | |
911d4d48 DE |
277 | case ZEBRA_ROUTE_CONNECT: |
278 | case ZEBRA_ROUTE_KERNEL: | |
279 | proto = RTPROT_KERNEL; | |
280 | break; | |
d62a17ae | 281 | default: |
0761368a DS |
282 | /* |
283 | * When a user adds a new protocol this will show up | |
284 | * to let them know to do something about it. This | |
285 | * is intentionally a warn because we should see | |
286 | * this as part of development of a new protocol | |
287 | */ | |
9df414fe QY |
288 | zlog_debug( |
289 | "%s: Please add this protocol(%d) to proper rt_netlink.c handling", | |
15569c58 | 290 | __func__, proto); |
d62a17ae | 291 | proto = RTPROT_ZEBRA; |
292 | break; | |
293 | } | |
294 | ||
295 | return proto; | |
23b1f334 DD |
296 | } |
297 | ||
38e40db1 | 298 | static inline int proto2zebra(int proto, int family, bool is_nexthop) |
915902cb DS |
299 | { |
300 | switch (proto) { | |
301 | case RTPROT_BABEL: | |
302 | proto = ZEBRA_ROUTE_BABEL; | |
303 | break; | |
304 | case RTPROT_BGP: | |
305 | proto = ZEBRA_ROUTE_BGP; | |
306 | break; | |
307 | case RTPROT_OSPF: | |
d6816f68 DS |
308 | proto = (family == AF_INET) ? ZEBRA_ROUTE_OSPF |
309 | : ZEBRA_ROUTE_OSPF6; | |
915902cb DS |
310 | break; |
311 | case RTPROT_ISIS: | |
312 | proto = ZEBRA_ROUTE_ISIS; | |
313 | break; | |
314 | case RTPROT_RIP: | |
315 | proto = ZEBRA_ROUTE_RIP; | |
316 | break; | |
317 | case RTPROT_RIPNG: | |
318 | proto = ZEBRA_ROUTE_RIPNG; | |
319 | break; | |
320 | case RTPROT_NHRP: | |
321 | proto = ZEBRA_ROUTE_NHRP; | |
322 | break; | |
323 | case RTPROT_EIGRP: | |
324 | proto = ZEBRA_ROUTE_EIGRP; | |
325 | break; | |
326 | case RTPROT_LDP: | |
327 | proto = ZEBRA_ROUTE_LDP; | |
328 | break; | |
329 | case RTPROT_STATIC: | |
d4d71f11 | 330 | case RTPROT_ZSTATIC: |
915902cb DS |
331 | proto = ZEBRA_ROUTE_STATIC; |
332 | break; | |
0761368a DS |
333 | case RTPROT_SHARP: |
334 | proto = ZEBRA_ROUTE_SHARP; | |
335 | break; | |
336 | case RTPROT_PBR: | |
337 | proto = ZEBRA_ROUTE_PBR; | |
338 | break; | |
da82f6b4 CF |
339 | case RTPROT_OPENFABRIC: |
340 | proto = ZEBRA_ROUTE_OPENFABRIC; | |
341 | break; | |
31f937fb SM |
342 | case RTPROT_SRTE: |
343 | proto = ZEBRA_ROUTE_SRTE; | |
344 | break; | |
b09388f0 DS |
345 | case RTPROT_UNSPEC: |
346 | case RTPROT_REDIRECT: | |
347 | case RTPROT_KERNEL: | |
348 | case RTPROT_BOOT: | |
349 | case RTPROT_GATED: | |
350 | case RTPROT_RA: | |
351 | case RTPROT_MRT: | |
352 | case RTPROT_BIRD: | |
353 | case RTPROT_DNROUTED: | |
354 | case RTPROT_XORP: | |
355 | case RTPROT_NTK: | |
356 | case RTPROT_MROUTED: | |
357 | case RTPROT_KEEPALIVED: | |
358 | case RTPROT_OPENR: | |
359 | proto = ZEBRA_ROUTE_KERNEL; | |
360 | break; | |
38e40db1 SW |
361 | case RTPROT_ZEBRA: |
362 | if (is_nexthop) { | |
363 | proto = ZEBRA_ROUTE_NHG; | |
364 | break; | |
365 | } | |
366 | /* Intentional fall thru */ | |
915902cb | 367 | default: |
0761368a DS |
368 | /* |
369 | * When a user adds a new protocol this will show up | |
370 | * to let them know to do something about it. This | |
371 | * is intentionally a warn because we should see | |
372 | * this as part of development of a new protocol | |
373 | */ | |
9df414fe QY |
374 | zlog_debug( |
375 | "%s: Please add this protocol(%d) to proper rt_netlink.c handling", | |
15569c58 | 376 | __func__, proto); |
915902cb DS |
377 | proto = ZEBRA_ROUTE_KERNEL; |
378 | break; | |
379 | } | |
380 | return proto; | |
381 | } | |
382 | ||
12f6fb97 DS |
383 | /* |
384 | Pending: create an efficient table_id (in a tree/hash) based lookup) | |
385 | */ | |
9d866c07 | 386 | vrf_id_t vrf_lookup_by_table(uint32_t table_id, ns_id_t ns_id) |
12f6fb97 | 387 | { |
d62a17ae | 388 | struct vrf *vrf; |
389 | struct zebra_vrf *zvrf; | |
12f6fb97 | 390 | |
a2addae8 | 391 | RB_FOREACH (vrf, vrf_id_head, &vrfs_by_id) { |
78dd30b2 PG |
392 | zvrf = vrf->info; |
393 | if (zvrf == NULL) | |
d62a17ae | 394 | continue; |
78dd30b2 PG |
395 | /* case vrf with netns : match the netnsid */ |
396 | if (vrf_is_backend_netns()) { | |
397 | if (ns_id == zvrf_id(zvrf)) | |
398 | return zvrf_id(zvrf); | |
399 | } else { | |
400 | /* VRF is VRF_BACKEND_VRF_LITE */ | |
401 | if (zvrf->table_id != table_id) | |
402 | continue; | |
403 | return zvrf_id(zvrf); | |
404 | } | |
d62a17ae | 405 | } |
12f6fb97 | 406 | |
d62a17ae | 407 | return VRF_DEFAULT; |
12f6fb97 DS |
408 | } |
409 | ||
87da6a60 SW |
410 | /** |
411 | * @parse_encap_mpls() - Parses encapsulated mpls attributes | |
412 | * @tb: Pointer to rtattr to look for nested items in. | |
413 | * @labels: Pointer to store labels in. | |
414 | * | |
415 | * Return: Number of mpls labels found. | |
416 | */ | |
417 | static int parse_encap_mpls(struct rtattr *tb, mpls_label_t *labels) | |
418 | { | |
419 | struct rtattr *tb_encap[MPLS_IPTUNNEL_MAX + 1] = {0}; | |
420 | mpls_lse_t *lses = NULL; | |
421 | int num_labels = 0; | |
422 | uint32_t ttl = 0; | |
423 | uint32_t bos = 0; | |
424 | uint32_t exp = 0; | |
425 | mpls_label_t label = 0; | |
426 | ||
427 | netlink_parse_rtattr_nested(tb_encap, MPLS_IPTUNNEL_MAX, tb); | |
428 | lses = (mpls_lse_t *)RTA_DATA(tb_encap[MPLS_IPTUNNEL_DST]); | |
429 | while (!bos && num_labels < MPLS_MAX_LABELS) { | |
430 | mpls_lse_decode(lses[num_labels], &label, &ttl, &exp, &bos); | |
431 | labels[num_labels++] = label; | |
432 | } | |
433 | ||
434 | return num_labels; | |
435 | } | |
436 | ||
d49e6c4a HS |
437 | static enum seg6local_action_t |
438 | parse_encap_seg6local(struct rtattr *tb, | |
439 | struct seg6local_context *ctx) | |
440 | { | |
ce39ca16 | 441 | struct rtattr *tb_encap[SEG6_LOCAL_MAX + 1] = {}; |
d49e6c4a HS |
442 | enum seg6local_action_t act = ZEBRA_SEG6_LOCAL_ACTION_UNSPEC; |
443 | ||
ce39ca16 | 444 | netlink_parse_rtattr_nested(tb_encap, SEG6_LOCAL_MAX, tb); |
d49e6c4a HS |
445 | |
446 | if (tb_encap[SEG6_LOCAL_ACTION]) | |
447 | act = *(uint32_t *)RTA_DATA(tb_encap[SEG6_LOCAL_ACTION]); | |
448 | ||
449 | if (tb_encap[SEG6_LOCAL_NH4]) | |
450 | ctx->nh4 = *(struct in_addr *)RTA_DATA( | |
451 | tb_encap[SEG6_LOCAL_NH4]); | |
452 | ||
453 | if (tb_encap[SEG6_LOCAL_NH6]) | |
454 | ctx->nh6 = *(struct in6_addr *)RTA_DATA( | |
455 | tb_encap[SEG6_LOCAL_NH6]); | |
456 | ||
457 | if (tb_encap[SEG6_LOCAL_TABLE]) | |
458 | ctx->table = *(uint32_t *)RTA_DATA(tb_encap[SEG6_LOCAL_TABLE]); | |
459 | ||
7eab60a7 RS |
460 | if (tb_encap[SEG6_LOCAL_VRFTABLE]) |
461 | ctx->table = | |
462 | *(uint32_t *)RTA_DATA(tb_encap[SEG6_LOCAL_VRFTABLE]); | |
463 | ||
d49e6c4a HS |
464 | return act; |
465 | } | |
466 | ||
f16de90b HS |
467 | static int parse_encap_seg6(struct rtattr *tb, struct in6_addr *segs) |
468 | { | |
ce39ca16 | 469 | struct rtattr *tb_encap[SEG6_IPTUNNEL_MAX + 1] = {}; |
f16de90b HS |
470 | struct seg6_iptunnel_encap *ipt = NULL; |
471 | struct in6_addr *segments = NULL; | |
472 | ||
ce39ca16 | 473 | netlink_parse_rtattr_nested(tb_encap, SEG6_IPTUNNEL_MAX, tb); |
f16de90b HS |
474 | |
475 | /* | |
476 | * TODO: It's not support multiple SID list. | |
477 | */ | |
478 | if (tb_encap[SEG6_IPTUNNEL_SRH]) { | |
479 | ipt = (struct seg6_iptunnel_encap *) | |
480 | RTA_DATA(tb_encap[SEG6_IPTUNNEL_SRH]); | |
481 | segments = ipt->srh[0].segments; | |
482 | *segs = segments[0]; | |
483 | return 1; | |
484 | } | |
485 | ||
486 | return 0; | |
487 | } | |
488 | ||
489 | ||
77a44d94 SW |
490 | static struct nexthop |
491 | parse_nexthop_unicast(ns_id_t ns_id, struct rtmsg *rtm, struct rtattr **tb, | |
492 | enum blackhole_type bh_type, int index, void *prefsrc, | |
20822f9d | 493 | void *gate, afi_t afi, vrf_id_t vrf_id) |
77a44d94 SW |
494 | { |
495 | struct interface *ifp = NULL; | |
496 | struct nexthop nh = {0}; | |
497 | mpls_label_t labels[MPLS_MAX_LABELS] = {0}; | |
498 | int num_labels = 0; | |
b9596f13 | 499 | enum seg6local_action_t seg6l_act = ZEBRA_SEG6_LOCAL_ACTION_UNSPEC; |
1bda3e62 HS |
500 | struct seg6local_context seg6l_ctx = {}; |
501 | struct in6_addr seg6_segs = {}; | |
f16de90b | 502 | int num_segs = 0; |
77a44d94 | 503 | |
20822f9d | 504 | vrf_id_t nh_vrf_id = vrf_id; |
77a44d94 SW |
505 | size_t sz = (afi == AFI_IP) ? 4 : 16; |
506 | ||
507 | if (bh_type == BLACKHOLE_UNSPEC) { | |
508 | if (index && !gate) | |
509 | nh.type = NEXTHOP_TYPE_IFINDEX; | |
510 | else if (index && gate) | |
511 | nh.type = (afi == AFI_IP) ? NEXTHOP_TYPE_IPV4_IFINDEX | |
512 | : NEXTHOP_TYPE_IPV6_IFINDEX; | |
513 | else if (!index && gate) | |
514 | nh.type = (afi == AFI_IP) ? NEXTHOP_TYPE_IPV4 | |
515 | : NEXTHOP_TYPE_IPV6; | |
516 | else { | |
517 | nh.type = NEXTHOP_TYPE_BLACKHOLE; | |
518 | nh.bh_type = bh_type; | |
519 | } | |
520 | } else { | |
521 | nh.type = NEXTHOP_TYPE_BLACKHOLE; | |
522 | nh.bh_type = bh_type; | |
523 | } | |
524 | nh.ifindex = index; | |
525 | if (prefsrc) | |
526 | memcpy(&nh.src, prefsrc, sz); | |
527 | if (gate) | |
528 | memcpy(&nh.gate, gate, sz); | |
529 | ||
530 | if (index) { | |
531 | ifp = if_lookup_by_index_per_ns(zebra_ns_lookup(ns_id), index); | |
532 | if (ifp) | |
096f7609 | 533 | nh_vrf_id = ifp->vrf->vrf_id; |
77a44d94 SW |
534 | } |
535 | nh.vrf_id = nh_vrf_id; | |
536 | ||
537 | if (tb[RTA_ENCAP] && tb[RTA_ENCAP_TYPE] | |
538 | && *(uint16_t *)RTA_DATA(tb[RTA_ENCAP_TYPE]) | |
539 | == LWTUNNEL_ENCAP_MPLS) { | |
540 | num_labels = parse_encap_mpls(tb[RTA_ENCAP], labels); | |
541 | } | |
d49e6c4a HS |
542 | if (tb[RTA_ENCAP] && tb[RTA_ENCAP_TYPE] |
543 | && *(uint16_t *)RTA_DATA(tb[RTA_ENCAP_TYPE]) | |
544 | == LWTUNNEL_ENCAP_SEG6_LOCAL) { | |
545 | seg6l_act = parse_encap_seg6local(tb[RTA_ENCAP], &seg6l_ctx); | |
546 | } | |
f16de90b HS |
547 | if (tb[RTA_ENCAP] && tb[RTA_ENCAP_TYPE] |
548 | && *(uint16_t *)RTA_DATA(tb[RTA_ENCAP_TYPE]) | |
549 | == LWTUNNEL_ENCAP_SEG6) { | |
550 | num_segs = parse_encap_seg6(tb[RTA_ENCAP], &seg6_segs); | |
551 | } | |
77a44d94 SW |
552 | |
553 | if (rtm->rtm_flags & RTNH_F_ONLINK) | |
554 | SET_FLAG(nh.flags, NEXTHOP_FLAG_ONLINK); | |
555 | ||
c704cb44 DS |
556 | if (rtm->rtm_flags & RTNH_F_LINKDOWN) |
557 | SET_FLAG(nh.flags, NEXTHOP_FLAG_LINKDOWN); | |
558 | ||
77a44d94 SW |
559 | if (num_labels) |
560 | nexthop_add_labels(&nh, ZEBRA_LSP_STATIC, num_labels, labels); | |
561 | ||
d49e6c4a | 562 | if (seg6l_act != ZEBRA_SEG6_LOCAL_ACTION_UNSPEC) |
eab0f8f0 | 563 | nexthop_add_srv6_seg6local(&nh, seg6l_act, &seg6l_ctx); |
d49e6c4a | 564 | |
f16de90b | 565 | if (num_segs) |
eab0f8f0 | 566 | nexthop_add_srv6_seg6(&nh, &seg6_segs); |
f16de90b | 567 | |
77a44d94 SW |
568 | return nh; |
569 | } | |
570 | ||
20822f9d | 571 | static uint8_t parse_multipath_nexthops_unicast(ns_id_t ns_id, |
0eb97b86 | 572 | struct nexthop_group *ng, |
20822f9d SW |
573 | struct rtmsg *rtm, |
574 | struct rtnexthop *rtnh, | |
575 | struct rtattr **tb, | |
576 | void *prefsrc, vrf_id_t vrf_id) | |
577 | { | |
578 | void *gate = NULL; | |
579 | struct interface *ifp = NULL; | |
580 | int index = 0; | |
581 | /* MPLS labels */ | |
582 | mpls_label_t labels[MPLS_MAX_LABELS] = {0}; | |
583 | int num_labels = 0; | |
b9596f13 | 584 | enum seg6local_action_t seg6l_act = ZEBRA_SEG6_LOCAL_ACTION_UNSPEC; |
1bda3e62 HS |
585 | struct seg6local_context seg6l_ctx = {}; |
586 | struct in6_addr seg6_segs = {}; | |
f16de90b | 587 | int num_segs = 0; |
20822f9d SW |
588 | struct rtattr *rtnh_tb[RTA_MAX + 1] = {}; |
589 | ||
590 | int len = RTA_PAYLOAD(tb[RTA_MULTIPATH]); | |
591 | vrf_id_t nh_vrf_id = vrf_id; | |
592 | ||
20822f9d SW |
593 | for (;;) { |
594 | struct nexthop *nh = NULL; | |
595 | ||
596 | if (len < (int)sizeof(*rtnh) || rtnh->rtnh_len > len) | |
597 | break; | |
598 | ||
599 | index = rtnh->rtnh_ifindex; | |
600 | if (index) { | |
601 | /* | |
602 | * Yes we are looking this up | |
603 | * for every nexthop and just | |
604 | * using the last one looked | |
605 | * up right now | |
606 | */ | |
607 | ifp = if_lookup_by_index_per_ns(zebra_ns_lookup(ns_id), | |
608 | index); | |
609 | if (ifp) | |
096f7609 | 610 | nh_vrf_id = ifp->vrf->vrf_id; |
20822f9d SW |
611 | else { |
612 | flog_warn( | |
613 | EC_ZEBRA_UNKNOWN_INTERFACE, | |
614 | "%s: Unknown interface %u specified, defaulting to VRF_DEFAULT", | |
15569c58 | 615 | __func__, index); |
20822f9d SW |
616 | nh_vrf_id = VRF_DEFAULT; |
617 | } | |
618 | } else | |
619 | nh_vrf_id = vrf_id; | |
620 | ||
621 | if (rtnh->rtnh_len > sizeof(*rtnh)) { | |
20822f9d SW |
622 | netlink_parse_rtattr(rtnh_tb, RTA_MAX, RTNH_DATA(rtnh), |
623 | rtnh->rtnh_len - sizeof(*rtnh)); | |
624 | if (rtnh_tb[RTA_GATEWAY]) | |
625 | gate = RTA_DATA(rtnh_tb[RTA_GATEWAY]); | |
626 | if (rtnh_tb[RTA_ENCAP] && rtnh_tb[RTA_ENCAP_TYPE] | |
627 | && *(uint16_t *)RTA_DATA(rtnh_tb[RTA_ENCAP_TYPE]) | |
628 | == LWTUNNEL_ENCAP_MPLS) { | |
629 | num_labels = parse_encap_mpls( | |
630 | rtnh_tb[RTA_ENCAP], labels); | |
631 | } | |
d49e6c4a HS |
632 | if (rtnh_tb[RTA_ENCAP] && rtnh_tb[RTA_ENCAP_TYPE] |
633 | && *(uint16_t *)RTA_DATA(rtnh_tb[RTA_ENCAP_TYPE]) | |
634 | == LWTUNNEL_ENCAP_SEG6_LOCAL) { | |
635 | seg6l_act = parse_encap_seg6local( | |
636 | rtnh_tb[RTA_ENCAP], &seg6l_ctx); | |
637 | } | |
f16de90b HS |
638 | if (rtnh_tb[RTA_ENCAP] && rtnh_tb[RTA_ENCAP_TYPE] |
639 | && *(uint16_t *)RTA_DATA(rtnh_tb[RTA_ENCAP_TYPE]) | |
640 | == LWTUNNEL_ENCAP_SEG6) { | |
641 | num_segs = parse_encap_seg6(rtnh_tb[RTA_ENCAP], | |
642 | &seg6_segs); | |
643 | } | |
20822f9d SW |
644 | } |
645 | ||
f3354e16 SW |
646 | if (gate && rtm->rtm_family == AF_INET) { |
647 | if (index) | |
0eb97b86 MS |
648 | nh = nexthop_from_ipv4_ifindex( |
649 | gate, prefsrc, index, nh_vrf_id); | |
f3354e16 | 650 | else |
0eb97b86 MS |
651 | nh = nexthop_from_ipv4(gate, prefsrc, |
652 | nh_vrf_id); | |
f3354e16 SW |
653 | } else if (gate && rtm->rtm_family == AF_INET6) { |
654 | if (index) | |
0eb97b86 MS |
655 | nh = nexthop_from_ipv6_ifindex( |
656 | gate, index, nh_vrf_id); | |
f3354e16 | 657 | else |
0eb97b86 | 658 | nh = nexthop_from_ipv6(gate, nh_vrf_id); |
20822f9d | 659 | } else |
0eb97b86 | 660 | nh = nexthop_from_ifindex(index, nh_vrf_id); |
20822f9d SW |
661 | |
662 | if (nh) { | |
df7fb580 DS |
663 | nh->weight = rtnh->rtnh_hops + 1; |
664 | ||
20822f9d SW |
665 | if (num_labels) |
666 | nexthop_add_labels(nh, ZEBRA_LSP_STATIC, | |
667 | num_labels, labels); | |
668 | ||
d49e6c4a | 669 | if (seg6l_act != ZEBRA_SEG6_LOCAL_ACTION_UNSPEC) |
eab0f8f0 HS |
670 | nexthop_add_srv6_seg6local(nh, seg6l_act, |
671 | &seg6l_ctx); | |
d49e6c4a | 672 | |
f16de90b | 673 | if (num_segs) |
eab0f8f0 | 674 | nexthop_add_srv6_seg6(nh, &seg6_segs); |
f16de90b | 675 | |
20822f9d SW |
676 | if (rtnh->rtnh_flags & RTNH_F_ONLINK) |
677 | SET_FLAG(nh->flags, NEXTHOP_FLAG_ONLINK); | |
0eb97b86 MS |
678 | |
679 | /* Add to temporary list */ | |
680 | nexthop_group_add_sorted(ng, nh); | |
20822f9d SW |
681 | } |
682 | ||
683 | if (rtnh->rtnh_len == 0) | |
684 | break; | |
685 | ||
686 | len -= NLMSG_ALIGN(rtnh->rtnh_len); | |
687 | rtnh = RTNH_NEXT(rtnh); | |
688 | } | |
689 | ||
0eb97b86 | 690 | uint8_t nhop_num = nexthop_group_nexthop_num(ng); |
20822f9d SW |
691 | |
692 | return nhop_num; | |
693 | } | |
694 | ||
718e3744 | 695 | /* Looking up routing table by netlink interface. */ |
45f0a10b DS |
696 | int netlink_route_change_read_unicast_internal(struct nlmsghdr *h, |
697 | ns_id_t ns_id, int startup, | |
698 | struct zebra_dplane_ctx *ctx) | |
718e3744 | 699 | { |
d62a17ae | 700 | int len; |
701 | struct rtmsg *rtm; | |
702 | struct rtattr *tb[RTA_MAX + 1]; | |
acde7f6b | 703 | uint32_t flags = 0; |
d62a17ae | 704 | struct prefix p; |
792fa92e | 705 | struct prefix_ipv6 src_p = {}; |
78dd30b2 | 706 | vrf_id_t vrf_id; |
6a6d11a3 | 707 | bool selfroute; |
d62a17ae | 708 | |
709 | char anyaddr[16] = {0}; | |
710 | ||
915902cb | 711 | int proto = ZEBRA_ROUTE_KERNEL; |
d62a17ae | 712 | int index = 0; |
713 | int table; | |
714 | int metric = 0; | |
d7c0a89a | 715 | uint32_t mtu = 0; |
25715c7e | 716 | uint8_t distance = 0; |
4e40b6d6 | 717 | route_tag_t tag = 0; |
fcc89a9c | 718 | uint32_t nhe_id = 0; |
d62a17ae | 719 | |
720 | void *dest = NULL; | |
721 | void *gate = NULL; | |
722 | void *prefsrc = NULL; /* IPv4 preferred source host address */ | |
723 | void *src = NULL; /* IPv6 srcdest source prefix */ | |
e655a03c | 724 | enum blackhole_type bh_type = BLACKHOLE_UNSPEC; |
d62a17ae | 725 | |
3cee2135 DS |
726 | frrtrace(3, frr_zebra, netlink_route_change_read_unicast, h, ns_id, |
727 | startup); | |
728 | ||
d62a17ae | 729 | rtm = NLMSG_DATA(h); |
730 | ||
731 | if (startup && h->nlmsg_type != RTM_NEWROUTE) | |
732 | return 0; | |
e655a03c DL |
733 | switch (rtm->rtm_type) { |
734 | case RTN_UNICAST: | |
735 | break; | |
736 | case RTN_BLACKHOLE: | |
737 | bh_type = BLACKHOLE_NULL; | |
738 | break; | |
739 | case RTN_UNREACHABLE: | |
740 | bh_type = BLACKHOLE_REJECT; | |
741 | break; | |
742 | case RTN_PROHIBIT: | |
743 | bh_type = BLACKHOLE_ADMINPROHIB; | |
744 | break; | |
745 | default: | |
8c8f250b DS |
746 | if (IS_ZEBRA_DEBUG_KERNEL) |
747 | zlog_debug("Route rtm_type: %s(%d) intentionally ignoring", | |
748 | nl_rttype_to_str(rtm->rtm_type), | |
749 | rtm->rtm_type); | |
d62a17ae | 750 | return 0; |
e655a03c | 751 | } |
d62a17ae | 752 | |
753 | len = h->nlmsg_len - NLMSG_LENGTH(sizeof(struct rtmsg)); | |
9bdf8618 | 754 | if (len < 0) { |
15569c58 DA |
755 | zlog_err( |
756 | "%s: Message received from netlink is of a broken size %d %zu", | |
757 | __func__, h->nlmsg_len, | |
758 | (size_t)NLMSG_LENGTH(sizeof(struct rtmsg))); | |
d62a17ae | 759 | return -1; |
9bdf8618 | 760 | } |
d62a17ae | 761 | |
d62a17ae | 762 | netlink_parse_rtattr(tb, RTA_MAX, RTM_RTA(rtm), len); |
763 | ||
764 | if (rtm->rtm_flags & RTM_F_CLONED) | |
765 | return 0; | |
766 | if (rtm->rtm_protocol == RTPROT_REDIRECT) | |
767 | return 0; | |
768 | if (rtm->rtm_protocol == RTPROT_KERNEL) | |
769 | return 0; | |
770 | ||
6a6d11a3 NN |
771 | selfroute = is_selfroute(rtm->rtm_protocol); |
772 | ||
45f0a10b DS |
773 | if (!startup && selfroute && h->nlmsg_type == RTM_NEWROUTE && |
774 | !zrouter.asic_offloaded && !ctx) { | |
6ab5222f DS |
775 | if (IS_ZEBRA_DEBUG_KERNEL) |
776 | zlog_debug("Route type: %d Received that we think we have originated, ignoring", | |
777 | rtm->rtm_protocol); | |
d62a17ae | 778 | return 0; |
6ab5222f | 779 | } |
d62a17ae | 780 | |
781 | /* We don't care about change notifications for the MPLS table. */ | |
782 | /* TODO: Revisit this. */ | |
783 | if (rtm->rtm_family == AF_MPLS) | |
784 | return 0; | |
785 | ||
786 | /* Table corresponding to route. */ | |
787 | if (tb[RTA_TABLE]) | |
788 | table = *(int *)RTA_DATA(tb[RTA_TABLE]); | |
789 | else | |
790 | table = rtm->rtm_table; | |
791 | ||
792 | /* Map to VRF */ | |
78dd30b2 | 793 | vrf_id = vrf_lookup_by_table(table, ns_id); |
d62a17ae | 794 | if (vrf_id == VRF_DEFAULT) { |
795 | if (!is_zebra_valid_kernel_table(table) | |
796 | && !is_zebra_main_routing_table(table)) | |
797 | return 0; | |
798 | } | |
799 | ||
5a3cf853 DS |
800 | if (rtm->rtm_flags & RTM_F_TRAP) |
801 | flags |= ZEBRA_FLAG_TRAPPED; | |
802 | if (rtm->rtm_flags & RTM_F_OFFLOAD) | |
803 | flags |= ZEBRA_FLAG_OFFLOADED; | |
0d32fbee DS |
804 | if (rtm->rtm_flags & RTM_F_OFFLOAD_FAILED) |
805 | flags |= ZEBRA_FLAG_OFFLOAD_FAILED; | |
5a3cf853 | 806 | |
a048d523 DS |
807 | if (h->nlmsg_flags & NLM_F_APPEND) |
808 | flags |= ZEBRA_FLAG_OUTOFSYNC; | |
809 | ||
d62a17ae | 810 | /* Route which inserted by Zebra. */ |
6a6d11a3 | 811 | if (selfroute) { |
d62a17ae | 812 | flags |= ZEBRA_FLAG_SELFROUTE; |
38e40db1 | 813 | proto = proto2zebra(rtm->rtm_protocol, rtm->rtm_family, false); |
915902cb | 814 | } |
d62a17ae | 815 | if (tb[RTA_OIF]) |
816 | index = *(int *)RTA_DATA(tb[RTA_OIF]); | |
817 | ||
818 | if (tb[RTA_DST]) | |
819 | dest = RTA_DATA(tb[RTA_DST]); | |
820 | else | |
821 | dest = anyaddr; | |
822 | ||
823 | if (tb[RTA_SRC]) | |
824 | src = RTA_DATA(tb[RTA_SRC]); | |
825 | else | |
826 | src = anyaddr; | |
827 | ||
828 | if (tb[RTA_PREFSRC]) | |
829 | prefsrc = RTA_DATA(tb[RTA_PREFSRC]); | |
830 | ||
831 | if (tb[RTA_GATEWAY]) | |
832 | gate = RTA_DATA(tb[RTA_GATEWAY]); | |
833 | ||
fcc89a9c SW |
834 | if (tb[RTA_NH_ID]) |
835 | nhe_id = *(uint32_t *)RTA_DATA(tb[RTA_NH_ID]); | |
836 | ||
f19435a8 DS |
837 | if (tb[RTA_PRIORITY]) |
838 | metric = *(int *)RTA_DATA(tb[RTA_PRIORITY]); | |
d62a17ae | 839 | |
4e40b6d6 KK |
840 | #if defined(SUPPORT_REALMS) |
841 | if (tb[RTA_FLOW]) | |
842 | tag = *(uint32_t *)RTA_DATA(tb[RTA_FLOW]); | |
843 | #endif | |
844 | ||
f19435a8 DS |
845 | if (tb[RTA_METRICS]) { |
846 | struct rtattr *mxrta[RTAX_MAX + 1]; | |
d62a17ae | 847 | |
996c9314 | 848 | netlink_parse_rtattr(mxrta, RTAX_MAX, RTA_DATA(tb[RTA_METRICS]), |
f19435a8 | 849 | RTA_PAYLOAD(tb[RTA_METRICS])); |
d62a17ae | 850 | |
f19435a8 | 851 | if (mxrta[RTAX_MTU]) |
d7c0a89a | 852 | mtu = *(uint32_t *)RTA_DATA(mxrta[RTAX_MTU]); |
d62a17ae | 853 | } |
854 | ||
855 | if (rtm->rtm_family == AF_INET) { | |
856 | p.family = AF_INET; | |
930571d2 | 857 | if (rtm->rtm_dst_len > IPV4_MAX_BITLEN) { |
e17d9b2d | 858 | zlog_err( |
75829703 | 859 | "Invalid destination prefix length: %u received from kernel route change", |
930571d2 | 860 | rtm->rtm_dst_len); |
e17d9b2d | 861 | return -1; |
930571d2 | 862 | } |
d62a17ae | 863 | memcpy(&p.u.prefix4, dest, 4); |
864 | p.prefixlen = rtm->rtm_dst_len; | |
865 | ||
1f610a1f | 866 | if (rtm->rtm_src_len != 0) { |
9df414fe | 867 | flog_warn( |
e914ccbe | 868 | EC_ZEBRA_UNSUPPORTED_V4_SRCDEST, |
2dbe669b DA |
869 | "unsupported IPv4 sourcedest route (dest %pFX vrf %u)", |
870 | &p, vrf_id); | |
1f610a1f CF |
871 | return 0; |
872 | } | |
930571d2 | 873 | |
1f610a1f CF |
874 | /* Force debug below to not display anything for source */ |
875 | src_p.prefixlen = 0; | |
d62a17ae | 876 | } else if (rtm->rtm_family == AF_INET6) { |
877 | p.family = AF_INET6; | |
930571d2 | 878 | if (rtm->rtm_dst_len > IPV6_MAX_BITLEN) { |
e17d9b2d | 879 | zlog_err( |
75829703 | 880 | "Invalid destination prefix length: %u received from kernel route change", |
930571d2 | 881 | rtm->rtm_dst_len); |
e17d9b2d | 882 | return -1; |
930571d2 | 883 | } |
d62a17ae | 884 | memcpy(&p.u.prefix6, dest, 16); |
885 | p.prefixlen = rtm->rtm_dst_len; | |
886 | ||
887 | src_p.family = AF_INET6; | |
930571d2 | 888 | if (rtm->rtm_src_len > IPV6_MAX_BITLEN) { |
e17d9b2d | 889 | zlog_err( |
75829703 | 890 | "Invalid source prefix length: %u received from kernel route change", |
930571d2 | 891 | rtm->rtm_src_len); |
e17d9b2d | 892 | return -1; |
930571d2 | 893 | } |
d62a17ae | 894 | memcpy(&src_p.prefix, src, 16); |
895 | src_p.prefixlen = rtm->rtm_src_len; | |
deb28338 MS |
896 | } else { |
897 | /* We only handle the AFs we handle... */ | |
898 | if (IS_ZEBRA_DEBUG_KERNEL) | |
899 | zlog_debug("%s: unknown address-family %u", __func__, | |
900 | rtm->rtm_family); | |
901 | return 0; | |
d62a17ae | 902 | } |
903 | ||
25715c7e DS |
904 | /* |
905 | * For ZEBRA_ROUTE_KERNEL types: | |
906 | * | |
907 | * The metric/priority of the route received from the kernel | |
908 | * is a 32 bit number. We are going to interpret the high | |
909 | * order byte as the Admin Distance and the low order 3 bytes | |
910 | * as the metric. | |
911 | * | |
912 | * This will allow us to do two things: | |
913 | * 1) Allow the creation of kernel routes that can be | |
914 | * overridden by zebra. | |
915 | * 2) Allow the old behavior for 'most' kernel route types | |
916 | * if a user enters 'ip route ...' v4 routes get a metric | |
917 | * of 0 and v6 routes get a metric of 1024. Both of these | |
918 | * values will end up with a admin distance of 0, which | |
919 | * will cause them to win for the purposes of zebra. | |
920 | */ | |
921 | if (proto == ZEBRA_ROUTE_KERNEL) { | |
922 | distance = (metric >> 24) & 0xFF; | |
996c9314 | 923 | metric = (metric & 0x00FFFFFF); |
25715c7e DS |
924 | } |
925 | ||
d62a17ae | 926 | if (IS_ZEBRA_DEBUG_KERNEL) { |
d62a17ae | 927 | char buf2[PREFIX_STRLEN]; |
2dbe669b | 928 | |
bd47f3a3 | 929 | zlog_debug( |
2dbe669b DA |
930 | "%s %pFX%s%s vrf %s(%u) table_id: %u metric: %d Admin Distance: %d", |
931 | nl_msg_type_to_str(h->nlmsg_type), &p, | |
bd47f3a3 JU |
932 | src_p.prefixlen ? " from " : "", |
933 | src_p.prefixlen ? prefix2str(&src_p, buf2, sizeof(buf2)) | |
934 | : "", | |
935 | vrf_id_to_name(vrf_id), vrf_id, table, metric, | |
936 | distance); | |
d62a17ae | 937 | } |
938 | ||
939 | afi_t afi = AFI_IP; | |
940 | if (rtm->rtm_family == AF_INET6) | |
941 | afi = AFI_IP6; | |
942 | ||
943 | if (h->nlmsg_type == RTM_NEWROUTE) { | |
07fd1f7e DS |
944 | struct route_entry *re; |
945 | struct nexthop_group *ng = NULL; | |
946 | ||
947 | re = zebra_rib_route_entry_new(vrf_id, proto, 0, flags, nhe_id, | |
948 | table, metric, mtu, distance, | |
949 | tag); | |
950 | if (!nhe_id) | |
951 | ng = nexthop_group_new(); | |
8795f904 | 952 | |
fd36be7e | 953 | if (!tb[RTA_MULTIPATH]) { |
07fd1f7e | 954 | struct nexthop *nexthop, nh; |
8795f904 | 955 | |
77a44d94 SW |
956 | if (!nhe_id) { |
957 | nh = parse_nexthop_unicast( | |
958 | ns_id, rtm, tb, bh_type, index, prefsrc, | |
20822f9d | 959 | gate, afi, vrf_id); |
07fd1f7e DS |
960 | |
961 | nexthop = nexthop_new(); | |
962 | *nexthop = nh; | |
963 | nexthop_group_add_sorted(ng, nexthop); | |
87da6a60 | 964 | } |
fd36be7e | 965 | } else { |
d62a17ae | 966 | /* This is a multipath route */ |
d62a17ae | 967 | struct rtnexthop *rtnh = |
968 | (struct rtnexthop *)RTA_DATA(tb[RTA_MULTIPATH]); | |
d62a17ae | 969 | |
20822f9d | 970 | if (!nhe_id) { |
0eb97b86 MS |
971 | uint8_t nhop_num; |
972 | ||
973 | /* Use temporary list of nexthops; parse | |
974 | * message payload's nexthops. | |
975 | */ | |
0eb97b86 | 976 | nhop_num = |
20822f9d | 977 | parse_multipath_nexthops_unicast( |
0eb97b86 | 978 | ns_id, ng, rtm, rtnh, tb, |
20822f9d SW |
979 | prefsrc, vrf_id); |
980 | ||
981 | zserv_nexthop_num_warn( | |
982 | __func__, (const struct prefix *)&p, | |
983 | nhop_num); | |
0eb97b86 MS |
984 | |
985 | if (nhop_num == 0) { | |
986 | nexthop_group_delete(&ng); | |
987 | ng = NULL; | |
988 | } | |
d62a17ae | 989 | } |
07fd1f7e | 990 | } |
478c62e2 | 991 | if (nhe_id || ng) { |
45f0a10b DS |
992 | dplane_rib_add_multipath(afi, SAFI_UNICAST, &p, &src_p, |
993 | re, ng, startup, ctx); | |
478c62e2 DS |
994 | if (ng) |
995 | nexthop_group_delete(&ng); | |
996 | } else { | |
07fd1f7e DS |
997 | /* |
998 | * I really don't see how this is possible | |
999 | * but since we are testing for it let's | |
1000 | * let the end user know why the route | |
1001 | * that was just received was swallowed | |
1002 | * up and forgotten | |
1003 | */ | |
1004 | zlog_err( | |
1005 | "%s: %pFX multipath RTM_NEWROUTE has a invalid nexthop group from the kernel", | |
1006 | __func__, &p); | |
1007 | XFREE(MTYPE_RE, re); | |
d62a17ae | 1008 | } |
1009 | } else { | |
45f0a10b DS |
1010 | if (ctx) { |
1011 | zlog_err( | |
1012 | "%s: %pFX RTM_DELROUTE received but received a context as well", | |
1013 | __func__, &p); | |
1014 | return 0; | |
1015 | } | |
1016 | ||
bc541126 SW |
1017 | if (nhe_id) { |
1018 | rib_delete(afi, SAFI_UNICAST, vrf_id, proto, 0, flags, | |
1019 | &p, &src_p, NULL, nhe_id, table, metric, | |
3ceae22b | 1020 | distance, true); |
bc541126 SW |
1021 | } else { |
1022 | if (!tb[RTA_MULTIPATH]) { | |
1023 | struct nexthop nh; | |
760f39dc HS |
1024 | |
1025 | nh = parse_nexthop_unicast( | |
1026 | ns_id, rtm, tb, bh_type, index, prefsrc, | |
1027 | gate, afi, vrf_id); | |
bc541126 SW |
1028 | rib_delete(afi, SAFI_UNICAST, vrf_id, proto, 0, |
1029 | flags, &p, &src_p, &nh, 0, table, | |
3ceae22b | 1030 | metric, distance, true); |
8ba5bd58 | 1031 | } else { |
bc541126 SW |
1032 | /* XXX: need to compare the entire list of |
1033 | * nexthops here for NLM_F_APPEND stupidity */ | |
1034 | rib_delete(afi, SAFI_UNICAST, vrf_id, proto, 0, | |
1035 | flags, &p, &src_p, NULL, 0, table, | |
3ceae22b | 1036 | metric, distance, true); |
8ba5bd58 | 1037 | } |
d62a17ae | 1038 | } |
1039 | } | |
1040 | ||
45f0a10b DS |
1041 | return 1; |
1042 | } | |
1043 | ||
1044 | static int netlink_route_change_read_unicast(struct nlmsghdr *h, ns_id_t ns_id, | |
1045 | int startup) | |
1046 | { | |
1047 | return netlink_route_change_read_unicast_internal(h, ns_id, startup, | |
1048 | NULL); | |
718e3744 | 1049 | } |
1050 | ||
e3be0432 DS |
1051 | static struct mcast_route_data *mroute = NULL; |
1052 | ||
2414abd3 | 1053 | static int netlink_route_change_read_multicast(struct nlmsghdr *h, |
d62a17ae | 1054 | ns_id_t ns_id, int startup) |
565fdc75 | 1055 | { |
d62a17ae | 1056 | int len; |
1057 | struct rtmsg *rtm; | |
1058 | struct rtattr *tb[RTA_MAX + 1]; | |
1059 | struct mcast_route_data *m; | |
d62a17ae | 1060 | int iif = 0; |
1061 | int count; | |
1062 | int oif[256]; | |
1063 | int oif_count = 0; | |
d62a17ae | 1064 | char oif_list[256] = "\0"; |
78dd30b2 | 1065 | vrf_id_t vrf; |
43b5cc5e | 1066 | int table; |
d62a17ae | 1067 | |
afeb8524 DL |
1068 | assert(mroute); |
1069 | m = mroute; | |
d62a17ae | 1070 | |
1071 | rtm = NLMSG_DATA(h); | |
1072 | ||
1073 | len = h->nlmsg_len - NLMSG_LENGTH(sizeof(struct rtmsg)); | |
1074 | ||
d62a17ae | 1075 | netlink_parse_rtattr(tb, RTA_MAX, RTM_RTA(rtm), len); |
90d82769 | 1076 | |
43b5cc5e DS |
1077 | if (tb[RTA_TABLE]) |
1078 | table = *(int *)RTA_DATA(tb[RTA_TABLE]); | |
1079 | else | |
1080 | table = rtm->rtm_table; | |
1081 | ||
78dd30b2 | 1082 | vrf = vrf_lookup_by_table(table, ns_id); |
43b5cc5e | 1083 | |
d62a17ae | 1084 | if (tb[RTA_IIF]) |
1085 | iif = *(int *)RTA_DATA(tb[RTA_IIF]); | |
1086 | ||
4d3b4b18 MR |
1087 | if (tb[RTA_SRC]) { |
1088 | if (rtm->rtm_family == RTNL_FAMILY_IPMR) | |
1089 | m->src.ipaddr_v4 = | |
1090 | *(struct in_addr *)RTA_DATA(tb[RTA_SRC]); | |
1091 | else | |
1092 | m->src.ipaddr_v6 = | |
1093 | *(struct in6_addr *)RTA_DATA(tb[RTA_SRC]); | |
1094 | } | |
d62a17ae | 1095 | |
4d3b4b18 MR |
1096 | if (tb[RTA_DST]) { |
1097 | if (rtm->rtm_family == RTNL_FAMILY_IPMR) | |
1098 | m->grp.ipaddr_v4 = | |
1099 | *(struct in_addr *)RTA_DATA(tb[RTA_DST]); | |
1100 | else | |
1101 | m->grp.ipaddr_v6 = | |
1102 | *(struct in6_addr *)RTA_DATA(tb[RTA_DST]); | |
1103 | } | |
d62a17ae | 1104 | |
62819462 | 1105 | if (tb[RTA_EXPIRES]) |
d62a17ae | 1106 | m->lastused = *(unsigned long long *)RTA_DATA(tb[RTA_EXPIRES]); |
1107 | ||
1108 | if (tb[RTA_MULTIPATH]) { | |
1109 | struct rtnexthop *rtnh = | |
1110 | (struct rtnexthop *)RTA_DATA(tb[RTA_MULTIPATH]); | |
1111 | ||
1112 | len = RTA_PAYLOAD(tb[RTA_MULTIPATH]); | |
1113 | for (;;) { | |
1114 | if (len < (int)sizeof(*rtnh) || rtnh->rtnh_len > len) | |
1115 | break; | |
1116 | ||
1117 | oif[oif_count] = rtnh->rtnh_ifindex; | |
1118 | oif_count++; | |
1119 | ||
3c04071d SW |
1120 | if (rtnh->rtnh_len == 0) |
1121 | break; | |
1122 | ||
d62a17ae | 1123 | len -= NLMSG_ALIGN(rtnh->rtnh_len); |
1124 | rtnh = RTNH_NEXT(rtnh); | |
1125 | } | |
1126 | } | |
1127 | ||
4d3b4b18 MR |
1128 | if (rtm->rtm_family == RTNL_FAMILY_IPMR) { |
1129 | SET_IPADDR_V4(&m->src); | |
1130 | SET_IPADDR_V4(&m->grp); | |
1131 | } else if (rtm->rtm_family == RTNL_FAMILY_IP6MR) { | |
1132 | SET_IPADDR_V6(&m->src); | |
1133 | SET_IPADDR_V6(&m->grp); | |
1134 | } else { | |
1135 | zlog_warn("%s: Invalid rtm_family received", __func__); | |
1136 | return 0; | |
1137 | } | |
1138 | ||
d62a17ae | 1139 | if (IS_ZEBRA_DEBUG_KERNEL) { |
822c9af2 SW |
1140 | struct interface *ifp = NULL; |
1141 | struct zebra_vrf *zvrf = NULL; | |
1142 | ||
d62a17ae | 1143 | for (count = 0; count < oif_count; count++) { |
1144 | ifp = if_lookup_by_index(oif[count], vrf); | |
1145 | char temp[256]; | |
1146 | ||
772270f3 QY |
1147 | snprintf(temp, sizeof(temp), "%s(%d) ", |
1148 | ifp ? ifp->name : "Unknown", oif[count]); | |
eab4a5c2 | 1149 | strlcat(oif_list, temp, sizeof(oif_list)); |
d62a17ae | 1150 | } |
822c9af2 | 1151 | zvrf = zebra_vrf_lookup_by_id(vrf); |
d62a17ae | 1152 | ifp = if_lookup_by_index(iif, vrf); |
822c9af2 | 1153 | zlog_debug( |
4d3b4b18 | 1154 | "MCAST VRF: %s(%d) %s (%pIA,%pIA) IIF: %s(%d) OIF: %s jiffies: %lld", |
bd47f3a3 | 1155 | zvrf_name(zvrf), vrf, nl_msg_type_to_str(h->nlmsg_type), |
4d3b4b18 MR |
1156 | &m->src, &m->grp, ifp ? ifp->name : "Unknown", iif, |
1157 | oif_list, m->lastused); | |
90d82769 | 1158 | } |
d62a17ae | 1159 | return 0; |
565fdc75 DS |
1160 | } |
1161 | ||
2414abd3 | 1162 | int netlink_route_change(struct nlmsghdr *h, ns_id_t ns_id, int startup) |
565fdc75 | 1163 | { |
d62a17ae | 1164 | int len; |
d62a17ae | 1165 | struct rtmsg *rtm; |
1166 | ||
1167 | rtm = NLMSG_DATA(h); | |
1168 | ||
1169 | if (!(h->nlmsg_type == RTM_NEWROUTE || h->nlmsg_type == RTM_DELROUTE)) { | |
1170 | /* If this is not route add/delete message print warning. */ | |
9165c5f5 | 1171 | zlog_debug("Kernel message: %s NS %u", |
87b5d1b0 | 1172 | nl_msg_type_to_str(h->nlmsg_type), ns_id); |
d62a17ae | 1173 | return 0; |
1174 | } | |
1175 | ||
afeb8524 DL |
1176 | switch (rtm->rtm_family) { |
1177 | case AF_INET: | |
1178 | case AF_INET6: | |
1179 | break; | |
1180 | ||
1181 | case RTNL_FAMILY_IPMR: | |
1182 | case RTNL_FAMILY_IP6MR: | |
1183 | /* notifications on IPMR are irrelevant to zebra, we only care | |
1184 | * about responses to RTM_GETROUTE requests we sent. | |
1185 | */ | |
1186 | return 0; | |
1187 | ||
1188 | default: | |
9df414fe | 1189 | flog_warn( |
e914ccbe | 1190 | EC_ZEBRA_UNKNOWN_FAMILY, |
87b5d1b0 DS |
1191 | "Invalid address family: %u received from kernel route change: %s", |
1192 | rtm->rtm_family, nl_msg_type_to_str(h->nlmsg_type)); | |
8a1b681c SW |
1193 | return 0; |
1194 | } | |
1195 | ||
d62a17ae | 1196 | /* Connected route. */ |
1197 | if (IS_ZEBRA_DEBUG_KERNEL) | |
78dd30b2 | 1198 | zlog_debug("%s %s %s proto %s NS %u", |
d62a17ae | 1199 | nl_msg_type_to_str(h->nlmsg_type), |
1200 | nl_family_to_str(rtm->rtm_family), | |
1201 | nl_rttype_to_str(rtm->rtm_type), | |
78dd30b2 | 1202 | nl_rtproto_to_str(rtm->rtm_protocol), ns_id); |
d62a17ae | 1203 | |
d62a17ae | 1204 | |
1205 | len = h->nlmsg_len - NLMSG_LENGTH(sizeof(struct rtmsg)); | |
9bdf8618 | 1206 | if (len < 0) { |
15569c58 DA |
1207 | zlog_err( |
1208 | "%s: Message received from netlink is of a broken size: %d %zu", | |
1209 | __func__, h->nlmsg_len, | |
1210 | (size_t)NLMSG_LENGTH(sizeof(struct rtmsg))); | |
d62a17ae | 1211 | return -1; |
9bdf8618 | 1212 | } |
d62a17ae | 1213 | |
afeb8524 DL |
1214 | /* these are "magic" kernel-managed *unicast* routes used for |
1215 | * outputting locally generated multicast traffic (which uses unicast | |
1216 | * handling on Linux because ~reasons~. | |
1217 | */ | |
e655a03c | 1218 | if (rtm->rtm_type == RTN_MULTICAST) |
afeb8524 DL |
1219 | return 0; |
1220 | ||
1221 | netlink_route_change_read_unicast(h, ns_id, startup); | |
d62a17ae | 1222 | return 0; |
565fdc75 DS |
1223 | } |
1224 | ||
289602d7 | 1225 | /* Request for specific route information from the kernel */ |
d62a17ae | 1226 | static int netlink_request_route(struct zebra_ns *zns, int family, int type) |
289602d7 | 1227 | { |
d62a17ae | 1228 | struct { |
1229 | struct nlmsghdr n; | |
1230 | struct rtmsg rtm; | |
1231 | } req; | |
1232 | ||
1233 | /* Form the request, specifying filter (rtattr) if needed. */ | |
1234 | memset(&req, 0, sizeof(req)); | |
1235 | req.n.nlmsg_type = type; | |
718f9b0f | 1236 | req.n.nlmsg_flags = NLM_F_ROOT | NLM_F_MATCH | NLM_F_REQUEST; |
d62a17ae | 1237 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)); |
1238 | req.rtm.rtm_family = family; | |
1239 | ||
fd3f8e52 | 1240 | return netlink_request(&zns->netlink_cmd, &req); |
289602d7 | 1241 | } |
1242 | ||
718e3744 | 1243 | /* Routing table read function using netlink interface. Only called |
1244 | bootstrap time. */ | |
d62a17ae | 1245 | int netlink_route_read(struct zebra_ns *zns) |
718e3744 | 1246 | { |
d62a17ae | 1247 | int ret; |
85a75f1e MS |
1248 | struct zebra_dplane_info dp_info; |
1249 | ||
1250 | zebra_dplane_info_from_zns(&dp_info, zns, true /*is_cmd*/); | |
d62a17ae | 1251 | |
1252 | /* Get IPv4 routing table. */ | |
1253 | ret = netlink_request_route(zns, AF_INET, RTM_GETROUTE); | |
1254 | if (ret < 0) | |
1255 | return ret; | |
1256 | ret = netlink_parse_info(netlink_route_change_read_unicast, | |
9bfadae8 | 1257 | &zns->netlink_cmd, &dp_info, 0, true); |
d62a17ae | 1258 | if (ret < 0) |
1259 | return ret; | |
1260 | ||
1261 | /* Get IPv6 routing table. */ | |
1262 | ret = netlink_request_route(zns, AF_INET6, RTM_GETROUTE); | |
1263 | if (ret < 0) | |
1264 | return ret; | |
1265 | ret = netlink_parse_info(netlink_route_change_read_unicast, | |
9bfadae8 | 1266 | &zns->netlink_cmd, &dp_info, 0, true); |
d62a17ae | 1267 | if (ret < 0) |
1268 | return ret; | |
1269 | ||
1270 | return 0; | |
718e3744 | 1271 | } |
1272 | ||
0be6e7d7 JU |
1273 | /* |
1274 | * The function returns true if the gateway info could be added | |
1275 | * to the message, otherwise false is returned. | |
1276 | */ | |
1277 | static bool _netlink_route_add_gateway_info(uint8_t route_family, | |
312a6bee JU |
1278 | uint8_t gw_family, |
1279 | struct nlmsghdr *nlmsg, | |
1280 | size_t req_size, int bytelen, | |
1281 | const struct nexthop *nexthop) | |
40c7bdb0 | 1282 | { |
d62a17ae | 1283 | if (route_family == AF_MPLS) { |
1284 | struct gw_family_t gw_fam; | |
1285 | ||
1286 | gw_fam.family = gw_family; | |
1287 | if (gw_family == AF_INET) | |
1288 | memcpy(&gw_fam.gate.ipv4, &nexthop->gate.ipv4, bytelen); | |
1289 | else | |
1290 | memcpy(&gw_fam.gate.ipv6, &nexthop->gate.ipv6, bytelen); | |
0be6e7d7 JU |
1291 | if (!nl_attr_put(nlmsg, req_size, RTA_VIA, &gw_fam.family, |
1292 | bytelen + 2)) | |
1293 | return false; | |
d62a17ae | 1294 | } else { |
92d6f769 K |
1295 | if (!(nexthop->rparent |
1296 | && IS_MAPPED_IPV6(&nexthop->rparent->gate.ipv6))) { | |
1297 | if (gw_family == AF_INET) { | |
1298 | if (!nl_attr_put(nlmsg, req_size, RTA_GATEWAY, | |
1299 | &nexthop->gate.ipv4, bytelen)) | |
1300 | return false; | |
1301 | } else { | |
1302 | if (!nl_attr_put(nlmsg, req_size, RTA_GATEWAY, | |
1303 | &nexthop->gate.ipv6, bytelen)) | |
1304 | return false; | |
1305 | } | |
0be6e7d7 | 1306 | } |
d62a17ae | 1307 | } |
0be6e7d7 JU |
1308 | |
1309 | return true; | |
40c7bdb0 | 1310 | } |
1311 | ||
b7537db6 | 1312 | static int build_label_stack(struct mpls_label_stack *nh_label, |
5fa6bfff | 1313 | enum lsp_types_t nh_label_type, |
b7537db6 SW |
1314 | mpls_lse_t *out_lse, char *label_buf, |
1315 | size_t label_buf_size) | |
1316 | { | |
1317 | char label_buf1[20]; | |
1318 | int num_labels = 0; | |
1319 | ||
1320 | for (int i = 0; nh_label && i < nh_label->num_labels; i++) { | |
0bbad9d1 SW |
1321 | if (nh_label_type != ZEBRA_LSP_EVPN && |
1322 | nh_label->label[i] == MPLS_LABEL_IMPLICIT_NULL) | |
b7537db6 SW |
1323 | continue; |
1324 | ||
1325 | if (IS_ZEBRA_DEBUG_KERNEL) { | |
1326 | if (!num_labels) | |
7533cad7 QY |
1327 | snprintf(label_buf, label_buf_size, "label %u", |
1328 | nh_label->label[i]); | |
b7537db6 | 1329 | else { |
772270f3 QY |
1330 | snprintf(label_buf1, sizeof(label_buf1), "/%u", |
1331 | nh_label->label[i]); | |
b7537db6 SW |
1332 | strlcat(label_buf, label_buf1, label_buf_size); |
1333 | } | |
1334 | } | |
1335 | ||
5fa6bfff SW |
1336 | if (nh_label_type == ZEBRA_LSP_EVPN) |
1337 | out_lse[num_labels] = label2vni(&nh_label->label[i]); | |
1338 | else | |
1339 | out_lse[num_labels] = | |
1340 | mpls_lse_encode(nh_label->label[i], 0, 0, 0); | |
b7537db6 SW |
1341 | num_labels++; |
1342 | } | |
1343 | ||
1344 | return num_labels; | |
1345 | } | |
1346 | ||
e611f5da SW |
1347 | static bool _netlink_nexthop_encode_dvni_label(const struct nexthop *nexthop, |
1348 | struct nlmsghdr *nlmsg, | |
1349 | mpls_lse_t *out_lse, | |
1350 | size_t buflen, char *label_buf) | |
1351 | { | |
1352 | struct in_addr ipv4; | |
1353 | ||
1354 | if (!nl_attr_put64(nlmsg, buflen, LWTUNNEL_IP_ID, | |
1355 | htonll((uint64_t)out_lse[0]))) | |
1356 | return false; | |
1357 | ||
1358 | if (nexthop->type == NEXTHOP_TYPE_IPV4_IFINDEX) { | |
1359 | if (!nl_attr_put(nlmsg, buflen, LWTUNNEL_IP_DST, | |
1360 | &nexthop->gate.ipv4, 4)) | |
1361 | return false; | |
1362 | ||
1363 | } else if (nexthop->type == NEXTHOP_TYPE_IPV6_IFINDEX) { | |
1364 | if (IS_MAPPED_IPV6(&nexthop->gate.ipv6)) { | |
1365 | ipv4_mapped_ipv6_to_ipv4(&nexthop->gate.ipv6, &ipv4); | |
1366 | if (!nl_attr_put(nlmsg, buflen, LWTUNNEL_IP_DST, &ipv4, | |
1367 | 4)) | |
1368 | return false; | |
1369 | ||
1370 | } else { | |
1371 | if (!nl_attr_put(nlmsg, buflen, LWTUNNEL_IP_DST, | |
1372 | &nexthop->gate.ipv6, 16)) | |
1373 | return false; | |
1374 | } | |
1375 | } else { | |
1376 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1377 | zlog_debug( | |
1378 | "%s: nexthop %pNHv %s must NEXTHOP_TYPE_IPV*_IFINDEX to be vxlan encapped", | |
1379 | __func__, nexthop, label_buf); | |
1380 | ||
1381 | return false; | |
1382 | } | |
1383 | ||
1384 | return true; | |
1385 | } | |
1386 | ||
5fa6bfff | 1387 | static bool _netlink_route_encode_label_info(const struct nexthop *nexthop, |
a757997c JU |
1388 | struct nlmsghdr *nlmsg, |
1389 | size_t buflen, struct rtmsg *rtmsg, | |
1390 | char *label_buf, | |
1391 | size_t label_buf_size) | |
fa713d9e | 1392 | { |
d62a17ae | 1393 | mpls_lse_t out_lse[MPLS_MAX_LABELS]; |
a757997c | 1394 | int num_labels; |
5fa6bfff SW |
1395 | struct rtattr *nest; |
1396 | struct mpls_label_stack *nh_label; | |
1397 | enum lsp_types_t nh_label_type; | |
1398 | ||
1399 | nh_label = nexthop->nh_label; | |
1400 | nh_label_type = nexthop->nh_label_type; | |
bd47f3a3 | 1401 | |
d62a17ae | 1402 | /* |
1403 | * label_buf is *only* currently used within debugging. | |
1404 | * As such when we assign it we are guarding it inside | |
1405 | * a debug test. If you want to change this make sure | |
1406 | * you fix this assumption | |
1407 | */ | |
1408 | label_buf[0] = '\0'; | |
d62a17ae | 1409 | |
5fa6bfff SW |
1410 | num_labels = build_label_stack(nh_label, nh_label_type, out_lse, |
1411 | label_buf, label_buf_size); | |
1412 | ||
1413 | if (num_labels && nh_label_type == ZEBRA_LSP_EVPN) { | |
5fa6bfff SW |
1414 | if (!nl_attr_put16(nlmsg, buflen, RTA_ENCAP_TYPE, |
1415 | LWTUNNEL_ENCAP_IP)) | |
1416 | return false; | |
1417 | ||
1418 | nest = nl_attr_nest(nlmsg, buflen, RTA_ENCAP); | |
1419 | if (!nest) | |
1420 | return false; | |
1421 | ||
e611f5da SW |
1422 | if (_netlink_nexthop_encode_dvni_label(nexthop, nlmsg, out_lse, |
1423 | buflen, | |
1424 | label_buf) == false) | |
5fa6bfff SW |
1425 | return false; |
1426 | ||
5fa6bfff SW |
1427 | nl_attr_nest_end(nlmsg, nest); |
1428 | ||
1429 | } else if (num_labels) { | |
fa712963 RW |
1430 | /* Set the BoS bit */ |
1431 | out_lse[num_labels - 1] |= htonl(1 << MPLS_LS_S_SHIFT); | |
1432 | ||
0be6e7d7 | 1433 | if (rtmsg->rtm_family == AF_MPLS) { |
a757997c | 1434 | if (!nl_attr_put(nlmsg, buflen, RTA_NEWDST, &out_lse, |
0be6e7d7 JU |
1435 | num_labels * sizeof(mpls_lse_t))) |
1436 | return false; | |
1437 | } else { | |
a757997c JU |
1438 | if (!nl_attr_put16(nlmsg, buflen, RTA_ENCAP_TYPE, |
1439 | LWTUNNEL_ENCAP_MPLS)) | |
0be6e7d7 JU |
1440 | return false; |
1441 | ||
a757997c | 1442 | nest = nl_attr_nest(nlmsg, buflen, RTA_ENCAP); |
0be6e7d7 JU |
1443 | if (!nest) |
1444 | return false; | |
1445 | ||
a757997c | 1446 | if (!nl_attr_put(nlmsg, buflen, MPLS_IPTUNNEL_DST, |
0be6e7d7 JU |
1447 | &out_lse, |
1448 | num_labels * sizeof(mpls_lse_t))) | |
1449 | return false; | |
312a6bee | 1450 | nl_attr_nest_end(nlmsg, nest); |
66d42727 | 1451 | } |
0aabccc0 | 1452 | } |
fa713d9e | 1453 | |
a757997c JU |
1454 | return true; |
1455 | } | |
1456 | ||
1457 | static bool _netlink_route_encode_nexthop_src(const struct nexthop *nexthop, | |
1458 | int family, | |
1459 | struct nlmsghdr *nlmsg, | |
1460 | size_t buflen, int bytelen) | |
1461 | { | |
1462 | if (family == AF_INET) { | |
1463 | if (nexthop->rmap_src.ipv4.s_addr != INADDR_ANY) { | |
1464 | if (!nl_attr_put(nlmsg, buflen, RTA_PREFSRC, | |
1465 | &nexthop->rmap_src.ipv4, bytelen)) | |
1466 | return false; | |
1467 | } else if (nexthop->src.ipv4.s_addr != INADDR_ANY) { | |
1468 | if (!nl_attr_put(nlmsg, buflen, RTA_PREFSRC, | |
1469 | &nexthop->src.ipv4, bytelen)) | |
1470 | return false; | |
1471 | } | |
1472 | } else if (family == AF_INET6) { | |
1473 | if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->rmap_src.ipv6)) { | |
1474 | if (!nl_attr_put(nlmsg, buflen, RTA_PREFSRC, | |
1475 | &nexthop->rmap_src.ipv6, bytelen)) | |
1476 | return false; | |
1477 | } else if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->src.ipv6)) { | |
1478 | if (!nl_attr_put(nlmsg, buflen, RTA_PREFSRC, | |
1479 | &nexthop->src.ipv6, bytelen)) | |
1480 | return false; | |
1481 | } | |
1482 | } | |
1483 | ||
1484 | return true; | |
1485 | } | |
1486 | ||
f463eac7 HS |
1487 | static ssize_t fill_seg6ipt_encap(char *buffer, size_t buflen, |
1488 | const struct in6_addr *seg) | |
76fb7ae4 HS |
1489 | { |
1490 | struct seg6_iptunnel_encap *ipt; | |
1491 | struct ipv6_sr_hdr *srh; | |
1492 | const size_t srhlen = 24; | |
4df9d859 | 1493 | |
f463eac7 HS |
1494 | /* |
1495 | * Caution: Support only SINGLE-SID, not MULTI-SID | |
1496 | * This function only supports the case where segs represents | |
1497 | * a single SID. If you want to extend the SRv6 functionality, | |
1498 | * you should improve the Boundary Check. | |
1499 | * Ex. In case of set a SID-List include multiple-SIDs as an | |
1500 | * argument of the Transit Behavior, we must support variable | |
1501 | * boundary check for buflen. | |
1502 | */ | |
1503 | if (buflen < (sizeof(struct seg6_iptunnel_encap) + | |
1504 | sizeof(struct ipv6_sr_hdr) + 16)) | |
1505 | return -1; | |
1506 | ||
76fb7ae4 HS |
1507 | memset(buffer, 0, buflen); |
1508 | ||
1509 | ipt = (struct seg6_iptunnel_encap *)buffer; | |
1510 | ipt->mode = SEG6_IPTUN_MODE_ENCAP; | |
1511 | srh = ipt->srh; | |
1512 | srh->hdrlen = (srhlen >> 3) - 1; | |
1513 | srh->type = 4; | |
1514 | srh->segments_left = 0; | |
1515 | srh->first_segment = 0; | |
1516 | memcpy(&srh->segments[0], seg, sizeof(struct in6_addr)); | |
1517 | ||
1518 | return srhlen + 4; | |
1519 | } | |
1520 | ||
a757997c JU |
1521 | /* This function takes a nexthop as argument and adds |
1522 | * the appropriate netlink attributes to an existing | |
1523 | * netlink message. | |
1524 | * | |
1525 | * @param routedesc: Human readable description of route type | |
1526 | * (direct/recursive, single-/multipath) | |
1527 | * @param bytelen: Length of addresses in bytes. | |
1528 | * @param nexthop: Nexthop information | |
1529 | * @param nlmsg: nlmsghdr structure to fill in. | |
1530 | * @param req_size: The size allocated for the message. | |
1531 | * | |
1532 | * The function returns true if the nexthop could be added | |
1533 | * to the message, otherwise false is returned. | |
1534 | */ | |
1535 | static bool _netlink_route_build_singlepath(const struct prefix *p, | |
1536 | const char *routedesc, int bytelen, | |
1537 | const struct nexthop *nexthop, | |
1538 | struct nlmsghdr *nlmsg, | |
1539 | struct rtmsg *rtmsg, | |
1540 | size_t req_size, int cmd) | |
1541 | { | |
1542 | ||
1543 | char label_buf[256]; | |
1544 | struct vrf *vrf; | |
1545 | char addrstr[INET6_ADDRSTRLEN]; | |
1546 | ||
1547 | assert(nexthop); | |
1548 | ||
1549 | vrf = vrf_lookup_by_id(nexthop->vrf_id); | |
1550 | ||
5fa6bfff SW |
1551 | if (!_netlink_route_encode_label_info(nexthop, nlmsg, req_size, rtmsg, |
1552 | label_buf, sizeof(label_buf))) | |
a757997c JU |
1553 | return false; |
1554 | ||
eab0f8f0 HS |
1555 | if (nexthop->nh_srv6) { |
1556 | if (nexthop->nh_srv6->seg6local_action != | |
1557 | ZEBRA_SEG6_LOCAL_ACTION_UNSPEC) { | |
1558 | struct rtattr *nest; | |
1559 | const struct seg6local_context *ctx; | |
52026569 | 1560 | |
eab0f8f0 HS |
1561 | ctx = &nexthop->nh_srv6->seg6local_ctx; |
1562 | if (!nl_attr_put16(nlmsg, req_size, RTA_ENCAP_TYPE, | |
1563 | LWTUNNEL_ENCAP_SEG6_LOCAL)) | |
52026569 | 1564 | return false; |
eab0f8f0 HS |
1565 | |
1566 | nest = nl_attr_nest(nlmsg, req_size, RTA_ENCAP); | |
1567 | if (!nest) | |
52026569 | 1568 | return false; |
eab0f8f0 HS |
1569 | |
1570 | switch (nexthop->nh_srv6->seg6local_action) { | |
1571 | case ZEBRA_SEG6_LOCAL_ACTION_END: | |
1572 | if (!nl_attr_put32(nlmsg, req_size, | |
1573 | SEG6_LOCAL_ACTION, | |
1574 | SEG6_LOCAL_ACTION_END)) | |
1575 | return false; | |
1576 | break; | |
1577 | case ZEBRA_SEG6_LOCAL_ACTION_END_X: | |
1578 | if (!nl_attr_put32(nlmsg, req_size, | |
1579 | SEG6_LOCAL_ACTION, | |
1580 | SEG6_LOCAL_ACTION_END_X)) | |
1581 | return false; | |
1582 | if (!nl_attr_put(nlmsg, req_size, | |
1583 | SEG6_LOCAL_NH6, &ctx->nh6, | |
1584 | sizeof(struct in6_addr))) | |
1585 | return false; | |
1586 | break; | |
1587 | case ZEBRA_SEG6_LOCAL_ACTION_END_T: | |
1588 | if (!nl_attr_put32(nlmsg, req_size, | |
1589 | SEG6_LOCAL_ACTION, | |
1590 | SEG6_LOCAL_ACTION_END_T)) | |
1591 | return false; | |
1592 | if (!nl_attr_put32(nlmsg, req_size, | |
1593 | SEG6_LOCAL_TABLE, | |
1594 | ctx->table)) | |
1595 | return false; | |
1596 | break; | |
1597 | case ZEBRA_SEG6_LOCAL_ACTION_END_DX4: | |
1598 | if (!nl_attr_put32(nlmsg, req_size, | |
1599 | SEG6_LOCAL_ACTION, | |
1600 | SEG6_LOCAL_ACTION_END_DX4)) | |
1601 | return false; | |
1602 | if (!nl_attr_put(nlmsg, req_size, | |
1603 | SEG6_LOCAL_NH4, &ctx->nh4, | |
1604 | sizeof(struct in_addr))) | |
1605 | return false; | |
1606 | break; | |
1607 | case ZEBRA_SEG6_LOCAL_ACTION_END_DT6: | |
1608 | if (!nl_attr_put32(nlmsg, req_size, | |
1609 | SEG6_LOCAL_ACTION, | |
1610 | SEG6_LOCAL_ACTION_END_DT6)) | |
1611 | return false; | |
1612 | if (!nl_attr_put32(nlmsg, req_size, | |
1613 | SEG6_LOCAL_TABLE, | |
1614 | ctx->table)) | |
1615 | return false; | |
1616 | break; | |
7eab60a7 RS |
1617 | case ZEBRA_SEG6_LOCAL_ACTION_END_DT4: |
1618 | if (!nl_attr_put32(nlmsg, req_size, | |
1619 | SEG6_LOCAL_ACTION, | |
1620 | SEG6_LOCAL_ACTION_END_DT4)) | |
1621 | return false; | |
1622 | if (!nl_attr_put32(nlmsg, req_size, | |
1623 | SEG6_LOCAL_VRFTABLE, | |
1624 | ctx->table)) | |
1625 | return false; | |
1626 | break; | |
8bea07e4 CS |
1627 | case ZEBRA_SEG6_LOCAL_ACTION_END_DT46: |
1628 | if (!nl_attr_put32(nlmsg, req_size, | |
1629 | SEG6_LOCAL_ACTION, | |
1630 | SEG6_LOCAL_ACTION_END_DT46)) | |
1631 | return false; | |
1632 | if (!nl_attr_put32(nlmsg, req_size, | |
1633 | SEG6_LOCAL_VRFTABLE, | |
1634 | ctx->table)) | |
1635 | return false; | |
1636 | break; | |
a98701f0 DS |
1637 | case ZEBRA_SEG6_LOCAL_ACTION_END_DX2: |
1638 | case ZEBRA_SEG6_LOCAL_ACTION_END_DX6: | |
1639 | case ZEBRA_SEG6_LOCAL_ACTION_END_B6: | |
1640 | case ZEBRA_SEG6_LOCAL_ACTION_END_B6_ENCAP: | |
1641 | case ZEBRA_SEG6_LOCAL_ACTION_END_BM: | |
1642 | case ZEBRA_SEG6_LOCAL_ACTION_END_S: | |
1643 | case ZEBRA_SEG6_LOCAL_ACTION_END_AS: | |
1644 | case ZEBRA_SEG6_LOCAL_ACTION_END_AM: | |
1645 | case ZEBRA_SEG6_LOCAL_ACTION_END_BPF: | |
1646 | case ZEBRA_SEG6_LOCAL_ACTION_UNSPEC: | |
eab0f8f0 HS |
1647 | zlog_err("%s: unsupport seg6local behaviour action=%u", |
1648 | __func__, | |
1649 | nexthop->nh_srv6->seg6local_action); | |
0a543b79 | 1650 | return false; |
eab0f8f0 HS |
1651 | } |
1652 | nl_attr_nest_end(nlmsg, nest); | |
1653 | } | |
1654 | ||
1655 | if (!sid_zero(&nexthop->nh_srv6->seg6_segs)) { | |
1656 | char tun_buf[4096]; | |
1657 | ssize_t tun_len; | |
1658 | struct rtattr *nest; | |
1659 | ||
1660 | if (!nl_attr_put16(nlmsg, req_size, RTA_ENCAP_TYPE, | |
1661 | LWTUNNEL_ENCAP_SEG6)) | |
52026569 | 1662 | return false; |
eab0f8f0 HS |
1663 | nest = nl_attr_nest(nlmsg, req_size, RTA_ENCAP); |
1664 | if (!nest) | |
52026569 | 1665 | return false; |
eab0f8f0 HS |
1666 | tun_len = fill_seg6ipt_encap(tun_buf, sizeof(tun_buf), |
1667 | &nexthop->nh_srv6->seg6_segs); | |
1668 | if (tun_len < 0) | |
52026569 | 1669 | return false; |
eab0f8f0 HS |
1670 | if (!nl_attr_put(nlmsg, req_size, SEG6_IPTUNNEL_SRH, |
1671 | tun_buf, tun_len)) | |
52026569 | 1672 | return false; |
eab0f8f0 | 1673 | nl_attr_nest_end(nlmsg, nest); |
8689b25a | 1674 | } |
76fb7ae4 HS |
1675 | } |
1676 | ||
d62a17ae | 1677 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ONLINK)) |
1678 | rtmsg->rtm_flags |= RTNH_F_ONLINK; | |
1679 | ||
002e5c43 | 1680 | if (is_route_v4_over_v6(rtmsg->rtm_family, nexthop->type)) { |
d62a17ae | 1681 | rtmsg->rtm_flags |= RTNH_F_ONLINK; |
0be6e7d7 JU |
1682 | if (!nl_attr_put(nlmsg, req_size, RTA_GATEWAY, &ipv4_ll, 4)) |
1683 | return false; | |
1684 | if (!nl_attr_put32(nlmsg, req_size, RTA_OIF, nexthop->ifindex)) | |
1685 | return false; | |
d62a17ae | 1686 | |
a757997c JU |
1687 | if (cmd == RTM_NEWROUTE) { |
1688 | if (!_netlink_route_encode_nexthop_src( | |
1689 | nexthop, AF_INET, nlmsg, req_size, bytelen)) | |
0be6e7d7 JU |
1690 | return false; |
1691 | } | |
d62a17ae | 1692 | |
1693 | if (IS_ZEBRA_DEBUG_KERNEL) | |
9266b315 RZ |
1694 | zlog_debug("%s: 5549 (%s): %pFX nexthop via %s %s if %u vrf %s(%u)", |
1695 | __func__, routedesc, p, ipv4_ll_buf, | |
1696 | label_buf, nexthop->ifindex, | |
1697 | VRF_LOGNAME(vrf), nexthop->vrf_id); | |
0be6e7d7 | 1698 | return true; |
0aabccc0 DD |
1699 | } |
1700 | ||
d62a17ae | 1701 | if (nexthop->type == NEXTHOP_TYPE_IPV4 |
1702 | || nexthop->type == NEXTHOP_TYPE_IPV4_IFINDEX) { | |
1703 | /* Send deletes to the kernel without specifying the next-hop */ | |
0be6e7d7 JU |
1704 | if (cmd != RTM_DELROUTE) { |
1705 | if (!_netlink_route_add_gateway_info( | |
1706 | rtmsg->rtm_family, AF_INET, nlmsg, req_size, | |
1707 | bytelen, nexthop)) | |
1708 | return false; | |
1709 | } | |
d62a17ae | 1710 | |
1711 | if (cmd == RTM_NEWROUTE) { | |
a757997c JU |
1712 | if (!_netlink_route_encode_nexthop_src( |
1713 | nexthop, AF_INET, nlmsg, req_size, bytelen)) | |
1714 | return false; | |
d62a17ae | 1715 | } |
1716 | ||
9266b315 RZ |
1717 | if (IS_ZEBRA_DEBUG_KERNEL) { |
1718 | inet_ntop(AF_INET, &nexthop->gate.ipv4, addrstr, | |
1719 | sizeof(addrstr)); | |
1720 | zlog_debug("%s: (%s): %pFX nexthop via %s %s if %u vrf %s(%u)", | |
1721 | __func__, routedesc, p, addrstr, label_buf, | |
1722 | nexthop->ifindex, VRF_LOGNAME(vrf), | |
1723 | nexthop->vrf_id); | |
1724 | } | |
0aabccc0 | 1725 | } |
fa713d9e | 1726 | |
d62a17ae | 1727 | if (nexthop->type == NEXTHOP_TYPE_IPV6 |
1728 | || nexthop->type == NEXTHOP_TYPE_IPV6_IFINDEX) { | |
0be6e7d7 JU |
1729 | if (!_netlink_route_add_gateway_info(rtmsg->rtm_family, |
1730 | AF_INET6, nlmsg, req_size, | |
1731 | bytelen, nexthop)) | |
1732 | return false; | |
d62a17ae | 1733 | |
1734 | if (cmd == RTM_NEWROUTE) { | |
a757997c JU |
1735 | if (!_netlink_route_encode_nexthop_src( |
1736 | nexthop, AF_INET6, nlmsg, req_size, | |
1737 | bytelen)) | |
1738 | return false; | |
d62a17ae | 1739 | } |
fa713d9e | 1740 | |
9266b315 RZ |
1741 | if (IS_ZEBRA_DEBUG_KERNEL) { |
1742 | inet_ntop(AF_INET6, &nexthop->gate.ipv6, addrstr, | |
1743 | sizeof(addrstr)); | |
1744 | zlog_debug("%s: (%s): %pFX nexthop via %s %s if %u vrf %s(%u)", | |
1745 | __func__, routedesc, p, addrstr, label_buf, | |
1746 | nexthop->ifindex, VRF_LOGNAME(vrf), | |
1747 | nexthop->vrf_id); | |
1748 | } | |
d62a17ae | 1749 | } |
5e210522 DS |
1750 | |
1751 | /* | |
1752 | * We have the ifindex so we should always send it | |
1753 | * This is especially useful if we are doing route | |
1754 | * leaking. | |
1755 | */ | |
0be6e7d7 JU |
1756 | if (nexthop->type != NEXTHOP_TYPE_BLACKHOLE) { |
1757 | if (!nl_attr_put32(nlmsg, req_size, RTA_OIF, nexthop->ifindex)) | |
1758 | return false; | |
1759 | } | |
d62a17ae | 1760 | |
275565fb | 1761 | if (nexthop->type == NEXTHOP_TYPE_IFINDEX) { |
d62a17ae | 1762 | if (cmd == RTM_NEWROUTE) { |
a757997c JU |
1763 | if (!_netlink_route_encode_nexthop_src( |
1764 | nexthop, AF_INET, nlmsg, req_size, bytelen)) | |
1765 | return false; | |
d62a17ae | 1766 | } |
fa713d9e | 1767 | |
d62a17ae | 1768 | if (IS_ZEBRA_DEBUG_KERNEL) |
9266b315 RZ |
1769 | zlog_debug("%s: (%s): %pFX nexthop via if %u vrf %s(%u)", |
1770 | __func__, routedesc, p, nexthop->ifindex, | |
1771 | VRF_LOGNAME(vrf), nexthop->vrf_id); | |
0aabccc0 | 1772 | } |
0be6e7d7 JU |
1773 | |
1774 | return true; | |
fa713d9e CF |
1775 | } |
1776 | ||
63eaefa8 R |
1777 | /* This function appends tag value as rtnl flow attribute |
1778 | * to the given netlink msg only if value is less than 256. | |
1779 | * Used only if SUPPORT_REALMS enabled. | |
1780 | * | |
1781 | * @param nlmsg: nlmsghdr structure to fill in. | |
1782 | * @param maxlen: The size allocated for the message. | |
1783 | * @param tag: The route tag. | |
1784 | * | |
1785 | * The function returns true if the flow attribute could | |
1786 | * be added to the message, otherwise false is returned. | |
1787 | */ | |
1788 | static inline bool _netlink_set_tag(struct nlmsghdr *n, unsigned int maxlen, | |
1789 | route_tag_t tag) | |
1790 | { | |
1791 | if (tag > 0 && tag <= 255) { | |
1792 | if (!nl_attr_put32(n, maxlen, RTA_FLOW, tag)) | |
1793 | return false; | |
1794 | } | |
1795 | return true; | |
1796 | } | |
1797 | ||
fa713d9e | 1798 | /* This function takes a nexthop as argument and |
312a6bee | 1799 | * appends to the given netlink msg. If the nexthop |
fa713d9e CF |
1800 | * defines a preferred source, the src parameter |
1801 | * will be modified to point to that src, otherwise | |
1802 | * it will be kept unmodified. | |
1803 | * | |
1804 | * @param routedesc: Human readable description of route type | |
1805 | * (direct/recursive, single-/multipath) | |
1806 | * @param bytelen: Length of addresses in bytes. | |
1807 | * @param nexthop: Nexthop information | |
312a6bee JU |
1808 | * @param nlmsg: nlmsghdr structure to fill in. |
1809 | * @param req_size: The size allocated for the message. | |
fa713d9e CF |
1810 | * @param src: pointer pointing to a location where |
1811 | * the prefsrc should be stored. | |
0be6e7d7 JU |
1812 | * |
1813 | * The function returns true if the nexthop could be added | |
1814 | * to the message, otherwise false is returned. | |
fa713d9e | 1815 | */ |
63eaefa8 R |
1816 | static bool _netlink_route_build_multipath( |
1817 | const struct prefix *p, const char *routedesc, int bytelen, | |
1818 | const struct nexthop *nexthop, struct nlmsghdr *nlmsg, size_t req_size, | |
1819 | struct rtmsg *rtmsg, const union g_addr **src, route_tag_t tag) | |
fa713d9e | 1820 | { |
9a62e84b | 1821 | char label_buf[256]; |
bd47f3a3 | 1822 | struct vrf *vrf; |
312a6bee | 1823 | struct rtnexthop *rtnh; |
d62a17ae | 1824 | |
312a6bee | 1825 | rtnh = nl_attr_rtnh(nlmsg, req_size); |
0be6e7d7 JU |
1826 | if (rtnh == NULL) |
1827 | return false; | |
d62a17ae | 1828 | |
b7537db6 SW |
1829 | assert(nexthop); |
1830 | ||
bd47f3a3 JU |
1831 | vrf = vrf_lookup_by_id(nexthop->vrf_id); |
1832 | ||
5fa6bfff SW |
1833 | if (!_netlink_route_encode_label_info(nexthop, nlmsg, req_size, rtmsg, |
1834 | label_buf, sizeof(label_buf))) | |
a757997c | 1835 | return false; |
d62a17ae | 1836 | |
1837 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ONLINK)) | |
1838 | rtnh->rtnh_flags |= RTNH_F_ONLINK; | |
1839 | ||
002e5c43 | 1840 | if (is_route_v4_over_v6(rtmsg->rtm_family, nexthop->type)) { |
d62a17ae | 1841 | rtnh->rtnh_flags |= RTNH_F_ONLINK; |
a757997c | 1842 | if (!nl_attr_put(nlmsg, req_size, RTA_GATEWAY, &ipv4_ll, 4)) |
0be6e7d7 | 1843 | return false; |
d62a17ae | 1844 | rtnh->rtnh_ifindex = nexthop->ifindex; |
8d27e1aa | 1845 | if (nexthop->weight) |
1846 | rtnh->rtnh_hops = nexthop->weight - 1; | |
d62a17ae | 1847 | |
975a328e | 1848 | if (nexthop->rmap_src.ipv4.s_addr != INADDR_ANY) |
d62a17ae | 1849 | *src = &nexthop->rmap_src; |
975a328e | 1850 | else if (nexthop->src.ipv4.s_addr != INADDR_ANY) |
d62a17ae | 1851 | *src = &nexthop->src; |
1852 | ||
1853 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1854 | zlog_debug( | |
9266b315 RZ |
1855 | "%s: 5549 (%s): %pFX nexthop via %s %s if %u vrf %s(%u)", |
1856 | __func__, routedesc, p, ipv4_ll_buf, label_buf, | |
bd47f3a3 JU |
1857 | nexthop->ifindex, VRF_LOGNAME(vrf), |
1858 | nexthop->vrf_id); | |
312a6bee | 1859 | nl_attr_rtnh_end(nlmsg, rtnh); |
0be6e7d7 | 1860 | return true; |
d62a17ae | 1861 | } |
1862 | ||
1863 | if (nexthop->type == NEXTHOP_TYPE_IPV4 | |
1864 | || nexthop->type == NEXTHOP_TYPE_IPV4_IFINDEX) { | |
0be6e7d7 JU |
1865 | if (!_netlink_route_add_gateway_info(rtmsg->rtm_family, AF_INET, |
1866 | nlmsg, req_size, bytelen, | |
1867 | nexthop)) | |
1868 | return false; | |
1869 | ||
975a328e | 1870 | if (nexthop->rmap_src.ipv4.s_addr != INADDR_ANY) |
d62a17ae | 1871 | *src = &nexthop->rmap_src; |
975a328e | 1872 | else if (nexthop->src.ipv4.s_addr != INADDR_ANY) |
d62a17ae | 1873 | *src = &nexthop->src; |
1874 | ||
a50404aa RZ |
1875 | if (IS_ZEBRA_DEBUG_KERNEL) |
1876 | zlog_debug("%s: (%s): %pFX nexthop via %pI4 %s if %u vrf %s(%u)", | |
1877 | __func__, routedesc, p, &nexthop->gate.ipv4, | |
1878 | label_buf, nexthop->ifindex, | |
1879 | VRF_LOGNAME(vrf), nexthop->vrf_id); | |
d62a17ae | 1880 | } |
1881 | if (nexthop->type == NEXTHOP_TYPE_IPV6 | |
1882 | || nexthop->type == NEXTHOP_TYPE_IPV6_IFINDEX) { | |
0be6e7d7 JU |
1883 | if (!_netlink_route_add_gateway_info(rtmsg->rtm_family, |
1884 | AF_INET6, nlmsg, req_size, | |
1885 | bytelen, nexthop)) | |
1886 | return false; | |
d62a17ae | 1887 | |
1888 | if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->rmap_src.ipv6)) | |
1889 | *src = &nexthop->rmap_src; | |
1890 | else if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->src.ipv6)) | |
1891 | *src = &nexthop->src; | |
1892 | ||
a50404aa RZ |
1893 | if (IS_ZEBRA_DEBUG_KERNEL) |
1894 | zlog_debug("%s: (%s): %pFX nexthop via %pI6 %s if %u vrf %s(%u)", | |
1895 | __func__, routedesc, p, &nexthop->gate.ipv6, | |
1896 | label_buf, nexthop->ifindex, | |
1897 | VRF_LOGNAME(vrf), nexthop->vrf_id); | |
d62a17ae | 1898 | } |
5e210522 DS |
1899 | |
1900 | /* | |
1901 | * We have figured out the ifindex so we should always send it | |
1902 | * This is especially useful if we are doing route | |
1903 | * leaking. | |
1904 | */ | |
1905 | if (nexthop->type != NEXTHOP_TYPE_BLACKHOLE) | |
1906 | rtnh->rtnh_ifindex = nexthop->ifindex; | |
1907 | ||
d62a17ae | 1908 | /* ifindex */ |
275565fb | 1909 | if (nexthop->type == NEXTHOP_TYPE_IFINDEX) { |
975a328e | 1910 | if (nexthop->rmap_src.ipv4.s_addr != INADDR_ANY) |
d62a17ae | 1911 | *src = &nexthop->rmap_src; |
975a328e | 1912 | else if (nexthop->src.ipv4.s_addr != INADDR_ANY) |
d62a17ae | 1913 | *src = &nexthop->src; |
1914 | ||
1915 | if (IS_ZEBRA_DEBUG_KERNEL) | |
9266b315 RZ |
1916 | zlog_debug("%s: (%s): %pFX nexthop via if %u vrf %s(%u)", |
1917 | __func__, routedesc, p, nexthop->ifindex, | |
1918 | VRF_LOGNAME(vrf), nexthop->vrf_id); | |
d62a17ae | 1919 | } |
df7fb580 DS |
1920 | |
1921 | if (nexthop->weight) | |
1922 | rtnh->rtnh_hops = nexthop->weight - 1; | |
0be6e7d7 | 1923 | |
63eaefa8 R |
1924 | if (!_netlink_set_tag(nlmsg, req_size, tag)) |
1925 | return false; | |
1926 | ||
312a6bee | 1927 | nl_attr_rtnh_end(nlmsg, rtnh); |
0be6e7d7 | 1928 | return true; |
fa713d9e CF |
1929 | } |
1930 | ||
f2595bd5 DS |
1931 | static inline bool |
1932 | _netlink_mpls_build_singlepath(const struct prefix *p, const char *routedesc, | |
1933 | const struct zebra_nhlfe *nhlfe, | |
1934 | struct nlmsghdr *nlmsg, struct rtmsg *rtmsg, | |
1935 | size_t req_size, int cmd) | |
40c7bdb0 | 1936 | { |
d62a17ae | 1937 | int bytelen; |
d7c0a89a | 1938 | uint8_t family; |
40c7bdb0 | 1939 | |
d62a17ae | 1940 | family = NHLFE_FAMILY(nhlfe); |
1941 | bytelen = (family == AF_INET ? 4 : 16); | |
0be6e7d7 JU |
1942 | return _netlink_route_build_singlepath(p, routedesc, bytelen, |
1943 | nhlfe->nexthop, nlmsg, rtmsg, | |
1944 | req_size, cmd); | |
40c7bdb0 | 1945 | } |
1946 | ||
1947 | ||
0be6e7d7 | 1948 | static inline bool |
9a0132a5 | 1949 | _netlink_mpls_build_multipath(const struct prefix *p, const char *routedesc, |
f2595bd5 | 1950 | const struct zebra_nhlfe *nhlfe, |
312a6bee JU |
1951 | struct nlmsghdr *nlmsg, size_t req_size, |
1952 | struct rtmsg *rtmsg, const union g_addr **src) | |
40c7bdb0 | 1953 | { |
d62a17ae | 1954 | int bytelen; |
d7c0a89a | 1955 | uint8_t family; |
40c7bdb0 | 1956 | |
d62a17ae | 1957 | family = NHLFE_FAMILY(nhlfe); |
1958 | bytelen = (family == AF_INET ? 4 : 16); | |
0be6e7d7 JU |
1959 | return _netlink_route_build_multipath(p, routedesc, bytelen, |
1960 | nhlfe->nexthop, nlmsg, req_size, | |
63eaefa8 | 1961 | rtmsg, src, 0); |
40c7bdb0 | 1962 | } |
1963 | ||
d7c0a89a | 1964 | static void _netlink_mpls_debug(int cmd, uint32_t label, const char *routedesc) |
40c7bdb0 | 1965 | { |
d62a17ae | 1966 | if (IS_ZEBRA_DEBUG_KERNEL) |
0be6e7d7 JU |
1967 | zlog_debug("netlink_mpls_multipath_msg_encode() (%s): %s %u/20", |
1968 | routedesc, nl_msg_type_to_str(cmd), label); | |
fa713d9e CF |
1969 | } |
1970 | ||
05657ec2 PG |
1971 | static int netlink_neigh_update(int cmd, int ifindex, void *addr, char *lla, |
1972 | int llalen, ns_id_t ns_id, uint8_t family, | |
1973 | bool permanent, uint8_t protocol) | |
5c610faf | 1974 | { |
d62a17ae | 1975 | struct { |
1976 | struct nlmsghdr n; | |
1977 | struct ndmsg ndm; | |
1978 | char buf[256]; | |
1979 | } req; | |
5c610faf | 1980 | |
5895d33f | 1981 | struct zebra_ns *zns = zebra_ns_lookup(ns_id); |
8f7d9fc0 | 1982 | |
5605ecfc | 1983 | memset(&req, 0, sizeof(req)); |
5c610faf | 1984 | |
d62a17ae | 1985 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)); |
1986 | req.n.nlmsg_flags = NLM_F_CREATE | NLM_F_REQUEST; | |
1987 | req.n.nlmsg_type = cmd; // RTM_NEWNEIGH or RTM_DELNEIGH | |
1988 | req.n.nlmsg_pid = zns->netlink_cmd.snl.nl_pid; | |
a55ba23f | 1989 | |
05657ec2 | 1990 | req.ndm.ndm_family = family; |
d62a17ae | 1991 | req.ndm.ndm_ifindex = ifindex; |
1992 | req.ndm.ndm_type = RTN_UNICAST; | |
05657ec2 PG |
1993 | if (cmd == RTM_NEWNEIGH) { |
1994 | if (!permanent) | |
1995 | req.ndm.ndm_state = NUD_REACHABLE; | |
1996 | else | |
1997 | req.ndm.ndm_state = NUD_PERMANENT; | |
1998 | } else | |
1999 | req.ndm.ndm_state = NUD_FAILED; | |
5c610faf | 2000 | |
312a6bee JU |
2001 | nl_attr_put(&req.n, sizeof(req), NDA_PROTOCOL, &protocol, |
2002 | sizeof(protocol)); | |
05657ec2 | 2003 | req.ndm.ndm_type = RTN_UNICAST; |
df948efc PG |
2004 | nl_attr_put(&req.n, sizeof(req), NDA_DST, addr, |
2005 | family2addrsize(family)); | |
05657ec2 PG |
2006 | if (lla) |
2007 | nl_attr_put(&req.n, sizeof(req), NDA_LLADDR, lla, llalen); | |
5c610faf | 2008 | |
55da97df K |
2009 | if (IS_ZEBRA_DEBUG_KERNEL) { |
2010 | char ip_str[INET6_ADDRSTRLEN + 8]; | |
2011 | struct interface *ifp = if_lookup_by_index_per_ns( | |
2012 | zebra_ns_lookup(ns_id), ifindex); | |
2013 | if (ifp) { | |
2014 | if (family == AF_INET6) | |
2015 | snprintfrr(ip_str, sizeof(ip_str), "ipv6 %pI6", | |
2016 | (struct in6_addr *)addr); | |
2017 | else | |
2018 | snprintfrr(ip_str, sizeof(ip_str), "ipv4 %pI4", | |
2019 | (in_addr_t *)addr); | |
2020 | zlog_debug( | |
2021 | "%s: %s ifname %s ifindex %u addr %s mac %pEA vrf %s(%u)", | |
2022 | __func__, nl_msg_type_to_str(cmd), ifp->name, | |
2023 | ifindex, ip_str, (struct ethaddr *)lla, | |
2024 | vrf_id_to_name(ifp->vrf->vrf_id), | |
2025 | ifp->vrf->vrf_id); | |
2026 | } | |
2027 | } | |
d62a17ae | 2028 | return netlink_talk(netlink_talk_filter, &req.n, &zns->netlink_cmd, zns, |
9bfadae8 | 2029 | false); |
5c610faf DS |
2030 | } |
2031 | ||
762288f5 SW |
2032 | static bool nexthop_set_src(const struct nexthop *nexthop, int family, |
2033 | union g_addr *src) | |
2034 | { | |
2035 | if (family == AF_INET) { | |
2036 | if (nexthop->rmap_src.ipv4.s_addr != INADDR_ANY) { | |
2037 | src->ipv4 = nexthop->rmap_src.ipv4; | |
2038 | return true; | |
2039 | } else if (nexthop->src.ipv4.s_addr != INADDR_ANY) { | |
2040 | src->ipv4 = nexthop->src.ipv4; | |
2041 | return true; | |
2042 | } | |
2043 | } else if (family == AF_INET6) { | |
2044 | if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->rmap_src.ipv6)) { | |
2045 | src->ipv6 = nexthop->rmap_src.ipv6; | |
2046 | return true; | |
2047 | } else if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->src.ipv6)) { | |
2048 | src->ipv6 = nexthop->src.ipv6; | |
2049 | return true; | |
2050 | } | |
2051 | } | |
2052 | ||
2053 | return false; | |
2054 | } | |
2055 | ||
0be6e7d7 JU |
2056 | /* |
2057 | * The function returns true if the attribute could be added | |
2058 | * to the message, otherwise false is returned. | |
2059 | */ | |
2060 | static int netlink_route_nexthop_encap(struct nlmsghdr *n, size_t nlen, | |
2061 | struct nexthop *nh) | |
f2a0ba3a RZ |
2062 | { |
2063 | struct rtattr *nest; | |
2064 | ||
2065 | switch (nh->nh_encap_type) { | |
2066 | case NET_VXLAN: | |
a757997c | 2067 | if (!nl_attr_put16(n, nlen, RTA_ENCAP_TYPE, nh->nh_encap_type)) |
0be6e7d7 | 2068 | return false; |
f2a0ba3a | 2069 | |
312a6bee | 2070 | nest = nl_attr_nest(n, nlen, RTA_ENCAP); |
0be6e7d7 JU |
2071 | if (!nest) |
2072 | return false; | |
2073 | ||
2074 | if (!nl_attr_put32(n, nlen, 0 /* VXLAN_VNI */, | |
2075 | nh->nh_encap.vni)) | |
2076 | return false; | |
312a6bee | 2077 | nl_attr_nest_end(n, nest); |
f2a0ba3a RZ |
2078 | break; |
2079 | } | |
0be6e7d7 JU |
2080 | |
2081 | return true; | |
f2a0ba3a RZ |
2082 | } |
2083 | ||
7cdb1a84 MS |
2084 | /* |
2085 | * Routing table change via netlink interface, using a dataplane context object | |
0be6e7d7 JU |
2086 | * |
2087 | * Returns -1 on failure, 0 when the msg doesn't fit entirely in the buffer | |
2088 | * otherwise the number of bytes written to buf. | |
7cdb1a84 | 2089 | */ |
0be6e7d7 JU |
2090 | ssize_t netlink_route_multipath_msg_encode(int cmd, |
2091 | struct zebra_dplane_ctx *ctx, | |
2092 | uint8_t *data, size_t datalen, | |
2093 | bool fpm, bool force_nhg) | |
7cdb1a84 MS |
2094 | { |
2095 | int bytelen; | |
7cdb1a84 MS |
2096 | struct nexthop *nexthop = NULL; |
2097 | unsigned int nexthop_num; | |
7cdb1a84 | 2098 | const char *routedesc; |
762288f5 | 2099 | bool setsrc = false; |
7cdb1a84 MS |
2100 | union g_addr src; |
2101 | const struct prefix *p, *src_p; | |
2102 | uint32_t table_id; | |
d4000d7b | 2103 | struct nlsock *nl; |
63eaefa8 | 2104 | route_tag_t tag = 0; |
7cdb1a84 MS |
2105 | |
2106 | struct { | |
2107 | struct nlmsghdr n; | |
2108 | struct rtmsg r; | |
e57a3fab RZ |
2109 | char buf[]; |
2110 | } *req = (void *)data; | |
7cdb1a84 MS |
2111 | |
2112 | p = dplane_ctx_get_dest(ctx); | |
2113 | src_p = dplane_ctx_get_src(ctx); | |
2114 | ||
0be6e7d7 JU |
2115 | if (datalen < sizeof(*req)) |
2116 | return 0; | |
2117 | ||
d4000d7b DS |
2118 | nl = kernel_netlink_nlsock_lookup(dplane_ctx_get_ns_sock(ctx)); |
2119 | ||
e57a3fab | 2120 | memset(req, 0, sizeof(*req)); |
7cdb1a84 | 2121 | |
b9c87515 | 2122 | bytelen = (p->family == AF_INET ? 4 : 16); |
7cdb1a84 | 2123 | |
e57a3fab RZ |
2124 | req->n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)); |
2125 | req->n.nlmsg_flags = NLM_F_CREATE | NLM_F_REQUEST; | |
7cdb1a84 | 2126 | |
334734a8 DS |
2127 | if ((cmd == RTM_NEWROUTE) && |
2128 | ((p->family == AF_INET) || v6_rr_semantics)) | |
e57a3fab | 2129 | req->n.nlmsg_flags |= NLM_F_REPLACE; |
7cdb1a84 | 2130 | |
e57a3fab | 2131 | req->n.nlmsg_type = cmd; |
7cdb1a84 | 2132 | |
d4000d7b | 2133 | req->n.nlmsg_pid = nl->snl.nl_pid; |
7cdb1a84 | 2134 | |
b9c87515 | 2135 | req->r.rtm_family = p->family; |
e57a3fab RZ |
2136 | req->r.rtm_dst_len = p->prefixlen; |
2137 | req->r.rtm_src_len = src_p ? src_p->prefixlen : 0; | |
2138 | req->r.rtm_scope = RT_SCOPE_UNIVERSE; | |
7cdb1a84 | 2139 | |
5709131c | 2140 | if (cmd == RTM_DELROUTE) |
e57a3fab | 2141 | req->r.rtm_protocol = zebra2proto(dplane_ctx_get_old_type(ctx)); |
5709131c | 2142 | else |
e57a3fab | 2143 | req->r.rtm_protocol = zebra2proto(dplane_ctx_get_type(ctx)); |
7cdb1a84 MS |
2144 | |
2145 | /* | |
2146 | * blackhole routes are not RTN_UNICAST, they are | |
2147 | * RTN_ BLACKHOLE|UNREACHABLE|PROHIBIT | |
2148 | * so setting this value as a RTN_UNICAST would | |
2149 | * cause the route lookup of just the prefix | |
2150 | * to fail. So no need to specify this for | |
2151 | * the RTM_DELROUTE case | |
2152 | */ | |
2153 | if (cmd != RTM_DELROUTE) | |
e57a3fab | 2154 | req->r.rtm_type = RTN_UNICAST; |
7cdb1a84 | 2155 | |
0be6e7d7 JU |
2156 | if (!nl_attr_put(&req->n, datalen, RTA_DST, &p->u.prefix, bytelen)) |
2157 | return 0; | |
2158 | if (src_p) { | |
2159 | if (!nl_attr_put(&req->n, datalen, RTA_SRC, &src_p->u.prefix, | |
2160 | bytelen)) | |
2161 | return 0; | |
2162 | } | |
7cdb1a84 MS |
2163 | |
2164 | /* Metric. */ | |
2165 | /* Hardcode the metric for all routes coming from zebra. Metric isn't | |
2166 | * used | |
2167 | * either by the kernel or by zebra. Its purely for calculating best | |
2168 | * path(s) | |
2169 | * by the routing protocol and for communicating with protocol peers. | |
2170 | */ | |
0be6e7d7 | 2171 | if (!nl_attr_put32(&req->n, datalen, RTA_PRIORITY, |
68ff69fa | 2172 | ROUTE_INSTALLATION_METRIC)) |
0be6e7d7 | 2173 | return 0; |
7cdb1a84 MS |
2174 | |
2175 | #if defined(SUPPORT_REALMS) | |
63eaefa8 R |
2176 | if (cmd == RTM_DELROUTE) |
2177 | tag = dplane_ctx_get_old_tag(ctx); | |
2178 | else | |
2179 | tag = dplane_ctx_get_tag(ctx); | |
7cdb1a84 | 2180 | #endif |
63eaefa8 | 2181 | |
7cdb1a84 MS |
2182 | /* Table corresponding to this route. */ |
2183 | table_id = dplane_ctx_get_table(ctx); | |
2184 | if (table_id < 256) | |
e57a3fab | 2185 | req->r.rtm_table = table_id; |
7cdb1a84 | 2186 | else { |
e57a3fab | 2187 | req->r.rtm_table = RT_TABLE_UNSPEC; |
0be6e7d7 JU |
2188 | if (!nl_attr_put32(&req->n, datalen, RTA_TABLE, table_id)) |
2189 | return 0; | |
7cdb1a84 MS |
2190 | } |
2191 | ||
9266b315 RZ |
2192 | if (IS_ZEBRA_DEBUG_KERNEL) |
2193 | zlog_debug( | |
2194 | "%s: %s %pFX vrf %u(%u)", __func__, | |
2195 | nl_msg_type_to_str(cmd), p, dplane_ctx_get_vrf(ctx), | |
2196 | table_id); | |
7cdb1a84 MS |
2197 | |
2198 | /* | |
2199 | * If we are not updating the route and we have received | |
2200 | * a route delete, then all we need to fill in is the | |
2201 | * prefix information to tell the kernel to schwack | |
2202 | * it. | |
2203 | */ | |
63eaefa8 R |
2204 | if (cmd == RTM_DELROUTE) { |
2205 | if (!_netlink_set_tag(&req->n, datalen, tag)) | |
2206 | return 0; | |
0be6e7d7 | 2207 | return NLMSG_ALIGN(req->n.nlmsg_len); |
63eaefa8 | 2208 | } |
7cdb1a84 MS |
2209 | |
2210 | if (dplane_ctx_get_mtu(ctx) || dplane_ctx_get_nh_mtu(ctx)) { | |
312a6bee | 2211 | struct rtattr *nest; |
7cdb1a84 MS |
2212 | uint32_t mtu = dplane_ctx_get_mtu(ctx); |
2213 | uint32_t nexthop_mtu = dplane_ctx_get_nh_mtu(ctx); | |
5709131c | 2214 | |
7cdb1a84 MS |
2215 | if (!mtu || (nexthop_mtu && nexthop_mtu < mtu)) |
2216 | mtu = nexthop_mtu; | |
312a6bee JU |
2217 | |
2218 | nest = nl_attr_nest(&req->n, datalen, RTA_METRICS); | |
0be6e7d7 JU |
2219 | if (nest == NULL) |
2220 | return 0; | |
2221 | ||
2222 | if (!nl_attr_put(&req->n, datalen, RTAX_MTU, &mtu, sizeof(mtu))) | |
2223 | return 0; | |
312a6bee | 2224 | nl_attr_nest_end(&req->n, nest); |
7cdb1a84 MS |
2225 | } |
2226 | ||
4be03ff4 IR |
2227 | /* |
2228 | * Always install blackhole routes without using nexthops, because of | |
2229 | * the following kernel problems: | |
2230 | * 1. Kernel nexthops don't suport unreachable/prohibit route types. | |
2231 | * 2. Blackhole kernel nexthops are deleted when loopback is down. | |
2232 | */ | |
2233 | nexthop = dplane_ctx_get_ng(ctx)->nexthop; | |
2234 | if (nexthop) { | |
2235 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_RECURSIVE)) | |
2236 | nexthop = nexthop->resolved; | |
2237 | ||
2238 | if (nexthop->type == NEXTHOP_TYPE_BLACKHOLE) { | |
2239 | switch (nexthop->bh_type) { | |
2240 | case BLACKHOLE_ADMINPROHIB: | |
2241 | req->r.rtm_type = RTN_PROHIBIT; | |
2242 | break; | |
2243 | case BLACKHOLE_REJECT: | |
2244 | req->r.rtm_type = RTN_UNREACHABLE; | |
2245 | break; | |
a98701f0 DS |
2246 | case BLACKHOLE_UNSPEC: |
2247 | case BLACKHOLE_NULL: | |
4be03ff4 IR |
2248 | req->r.rtm_type = RTN_BLACKHOLE; |
2249 | break; | |
2250 | } | |
2251 | return NLMSG_ALIGN(req->n.nlmsg_len); | |
2252 | } | |
2253 | } | |
2254 | ||
6c67f41f SW |
2255 | if ((!fpm && kernel_nexthops_supported() |
2256 | && (!proto_nexthops_only() | |
2257 | || is_proto_nhg(dplane_ctx_get_nhe_id(ctx), 0))) | |
2258 | || (fpm && force_nhg)) { | |
d8bfd8dc | 2259 | /* Kernel supports nexthop objects */ |
9a0132a5 | 2260 | if (IS_ZEBRA_DEBUG_KERNEL) |
0be6e7d7 JU |
2261 | zlog_debug("%s: %pFX nhg_id is %u", __func__, p, |
2262 | dplane_ctx_get_nhe_id(ctx)); | |
e57a3fab | 2263 | |
0be6e7d7 JU |
2264 | if (!nl_attr_put32(&req->n, datalen, RTA_NH_ID, |
2265 | dplane_ctx_get_nhe_id(ctx))) | |
2266 | return 0; | |
d8bfd8dc SW |
2267 | |
2268 | /* Have to determine src still */ | |
2269 | for (ALL_NEXTHOPS_PTR(dplane_ctx_get_ng(ctx), nexthop)) { | |
2270 | if (setsrc) | |
2271 | break; | |
2272 | ||
e57a3fab | 2273 | setsrc = nexthop_set_src(nexthop, p->family, &src); |
d8bfd8dc SW |
2274 | } |
2275 | ||
2276 | if (setsrc) { | |
0be6e7d7 JU |
2277 | if (p->family == AF_INET) { |
2278 | if (!nl_attr_put(&req->n, datalen, RTA_PREFSRC, | |
2279 | &src.ipv4, bytelen)) | |
2280 | return 0; | |
2281 | } else if (p->family == AF_INET6) { | |
2282 | if (!nl_attr_put(&req->n, datalen, RTA_PREFSRC, | |
2283 | &src.ipv6, bytelen)) | |
2284 | return 0; | |
2285 | } | |
d8bfd8dc | 2286 | } |
f78fe8f3 | 2287 | |
0be6e7d7 | 2288 | return NLMSG_ALIGN(req->n.nlmsg_len); |
de3f5488 SW |
2289 | } |
2290 | ||
7cdb1a84 | 2291 | /* Count overall nexthops so we can decide whether to use singlepath |
5709131c MS |
2292 | * or multipath case. |
2293 | */ | |
7cdb1a84 MS |
2294 | nexthop_num = 0; |
2295 | for (ALL_NEXTHOPS_PTR(dplane_ctx_get_ng(ctx), nexthop)) { | |
2296 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_RECURSIVE)) | |
2297 | continue; | |
b9c87515 | 2298 | if (!NEXTHOP_IS_ACTIVE(nexthop->flags)) |
7cdb1a84 MS |
2299 | continue; |
2300 | ||
2301 | nexthop_num++; | |
2302 | } | |
2303 | ||
2304 | /* Singlepath case. */ | |
220f0f42 | 2305 | if (nexthop_num == 1) { |
7cdb1a84 MS |
2306 | nexthop_num = 0; |
2307 | for (ALL_NEXTHOPS_PTR(dplane_ctx_get_ng(ctx), nexthop)) { | |
7cdb1a84 MS |
2308 | if (CHECK_FLAG(nexthop->flags, |
2309 | NEXTHOP_FLAG_RECURSIVE)) { | |
5709131c MS |
2310 | |
2311 | if (setsrc) | |
2312 | continue; | |
2313 | ||
b9c87515 RZ |
2314 | setsrc = nexthop_set_src(nexthop, p->family, |
2315 | &src); | |
f183e380 | 2316 | continue; |
7cdb1a84 MS |
2317 | } |
2318 | ||
b9c87515 | 2319 | if (NEXTHOP_IS_ACTIVE(nexthop->flags)) { |
7cdb1a84 MS |
2320 | routedesc = nexthop->rparent |
2321 | ? "recursive, single-path" | |
2322 | : "single-path"; | |
2323 | ||
63eaefa8 R |
2324 | if (!_netlink_set_tag(&req->n, datalen, tag)) |
2325 | return 0; | |
2326 | ||
0be6e7d7 JU |
2327 | if (!_netlink_route_build_singlepath( |
2328 | p, routedesc, bytelen, nexthop, | |
2329 | &req->n, &req->r, datalen, cmd)) | |
2330 | return 0; | |
7cdb1a84 MS |
2331 | nexthop_num++; |
2332 | break; | |
2333 | } | |
f2a0ba3a RZ |
2334 | |
2335 | /* | |
2336 | * Add encapsulation information when installing via | |
2337 | * FPM. | |
2338 | */ | |
0be6e7d7 JU |
2339 | if (fpm) { |
2340 | if (!netlink_route_nexthop_encap( | |
2341 | &req->n, datalen, nexthop)) | |
2342 | return 0; | |
2343 | } | |
7cdb1a84 | 2344 | } |
f2a0ba3a | 2345 | |
13e0321a | 2346 | if (setsrc) { |
0be6e7d7 JU |
2347 | if (p->family == AF_INET) { |
2348 | if (!nl_attr_put(&req->n, datalen, RTA_PREFSRC, | |
2349 | &src.ipv4, bytelen)) | |
2350 | return 0; | |
2351 | } else if (p->family == AF_INET6) { | |
2352 | if (!nl_attr_put(&req->n, datalen, RTA_PREFSRC, | |
2353 | &src.ipv6, bytelen)) | |
2354 | return 0; | |
2355 | } | |
7cdb1a84 MS |
2356 | } |
2357 | } else { /* Multipath case */ | |
312a6bee | 2358 | struct rtattr *nest; |
81793ac1 | 2359 | const union g_addr *src1 = NULL; |
7cdb1a84 | 2360 | |
312a6bee | 2361 | nest = nl_attr_nest(&req->n, datalen, RTA_MULTIPATH); |
0be6e7d7 JU |
2362 | if (nest == NULL) |
2363 | return 0; | |
7cdb1a84 MS |
2364 | |
2365 | nexthop_num = 0; | |
2366 | for (ALL_NEXTHOPS_PTR(dplane_ctx_get_ng(ctx), nexthop)) { | |
7cdb1a84 MS |
2367 | if (CHECK_FLAG(nexthop->flags, |
2368 | NEXTHOP_FLAG_RECURSIVE)) { | |
2369 | /* This only works for IPv4 now */ | |
5709131c MS |
2370 | if (setsrc) |
2371 | continue; | |
2372 | ||
b9c87515 RZ |
2373 | setsrc = nexthop_set_src(nexthop, p->family, |
2374 | &src); | |
78e54ded | 2375 | continue; |
7cdb1a84 MS |
2376 | } |
2377 | ||
b9c87515 | 2378 | if (NEXTHOP_IS_ACTIVE(nexthop->flags)) { |
7cdb1a84 MS |
2379 | routedesc = nexthop->rparent |
2380 | ? "recursive, multipath" | |
2381 | : "multipath"; | |
2382 | nexthop_num++; | |
2383 | ||
0be6e7d7 JU |
2384 | if (!_netlink_route_build_multipath( |
2385 | p, routedesc, bytelen, nexthop, | |
63eaefa8 R |
2386 | &req->n, datalen, &req->r, &src1, |
2387 | tag)) | |
0be6e7d7 | 2388 | return 0; |
7cdb1a84 MS |
2389 | |
2390 | if (!setsrc && src1) { | |
b9c87515 | 2391 | if (p->family == AF_INET) |
7cdb1a84 | 2392 | src.ipv4 = src1->ipv4; |
b9c87515 | 2393 | else if (p->family == AF_INET6) |
7cdb1a84 MS |
2394 | src.ipv6 = src1->ipv6; |
2395 | ||
2396 | setsrc = 1; | |
2397 | } | |
2398 | } | |
312a6bee | 2399 | } |
0be6e7d7 | 2400 | |
312a6bee JU |
2401 | nl_attr_nest_end(&req->n, nest); |
2402 | ||
2403 | /* | |
2404 | * Add encapsulation information when installing via | |
2405 | * FPM. | |
2406 | */ | |
2407 | if (fpm) { | |
2408 | for (ALL_NEXTHOPS_PTR(dplane_ctx_get_ng(ctx), | |
2409 | nexthop)) { | |
2410 | if (CHECK_FLAG(nexthop->flags, | |
2411 | NEXTHOP_FLAG_RECURSIVE)) | |
2412 | continue; | |
0be6e7d7 JU |
2413 | if (!netlink_route_nexthop_encap( |
2414 | &req->n, datalen, nexthop)) | |
2415 | return 0; | |
312a6bee | 2416 | } |
7cdb1a84 | 2417 | } |
f2a0ba3a | 2418 | |
312a6bee | 2419 | |
13e0321a | 2420 | if (setsrc) { |
0be6e7d7 JU |
2421 | if (p->family == AF_INET) { |
2422 | if (!nl_attr_put(&req->n, datalen, RTA_PREFSRC, | |
2423 | &src.ipv4, bytelen)) | |
2424 | return 0; | |
2425 | } else if (p->family == AF_INET6) { | |
2426 | if (!nl_attr_put(&req->n, datalen, RTA_PREFSRC, | |
2427 | &src.ipv6, bytelen)) | |
2428 | return 0; | |
2429 | } | |
7cdb1a84 MS |
2430 | if (IS_ZEBRA_DEBUG_KERNEL) |
2431 | zlog_debug("Setting source"); | |
2432 | } | |
7cdb1a84 MS |
2433 | } |
2434 | ||
2435 | /* If there is no useful nexthop then return. */ | |
2436 | if (nexthop_num == 0) { | |
2437 | if (IS_ZEBRA_DEBUG_KERNEL) | |
9266b315 | 2438 | zlog_debug("%s: No useful nexthop.", __func__); |
7cdb1a84 MS |
2439 | } |
2440 | ||
312a6bee | 2441 | return NLMSG_ALIGN(req->n.nlmsg_len); |
7cdb1a84 MS |
2442 | } |
2443 | ||
43b5cc5e | 2444 | int kernel_get_ipmr_sg_stats(struct zebra_vrf *zvrf, void *in) |
e3be0432 | 2445 | { |
5523c156 | 2446 | uint32_t actual_table; |
d62a17ae | 2447 | int suc = 0; |
2448 | struct mcast_route_data *mr = (struct mcast_route_data *)in; | |
bd8b9272 DS |
2449 | struct { |
2450 | struct nlmsghdr n; | |
31071fe3 | 2451 | struct rtmsg rtm; |
bd8b9272 DS |
2452 | char buf[256]; |
2453 | } req; | |
e3be0432 | 2454 | |
d62a17ae | 2455 | mroute = mr; |
5895d33f | 2456 | struct zebra_ns *zns; |
bd8b9272 | 2457 | |
009f8ad5 | 2458 | zns = zvrf->zns; |
5605ecfc | 2459 | memset(&req, 0, sizeof(req)); |
bd8b9272 | 2460 | |
31071fe3 | 2461 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)); |
bd8b9272 DS |
2462 | req.n.nlmsg_flags = NLM_F_REQUEST; |
2463 | req.n.nlmsg_pid = zns->netlink_cmd.snl.nl_pid; | |
2464 | ||
bd8b9272 DS |
2465 | req.n.nlmsg_type = RTM_GETROUTE; |
2466 | ||
4d3b4b18 | 2467 | if (mroute->family == AF_INET) { |
31071fe3 | 2468 | req.rtm.rtm_family = RTNL_FAMILY_IPMR; |
e1cd4bb1 DL |
2469 | req.rtm.rtm_dst_len = IPV4_MAX_BITLEN; |
2470 | req.rtm.rtm_src_len = IPV4_MAX_BITLEN; | |
2471 | ||
4d3b4b18 MR |
2472 | nl_attr_put(&req.n, sizeof(req), RTA_SRC, |
2473 | &mroute->src.ipaddr_v4, | |
2474 | sizeof(mroute->src.ipaddr_v4)); | |
2475 | nl_attr_put(&req.n, sizeof(req), RTA_DST, | |
2476 | &mroute->grp.ipaddr_v4, | |
2477 | sizeof(mroute->grp.ipaddr_v4)); | |
2478 | } else { | |
31071fe3 | 2479 | req.rtm.rtm_family = RTNL_FAMILY_IP6MR; |
e1cd4bb1 DL |
2480 | req.rtm.rtm_dst_len = IPV6_MAX_BITLEN; |
2481 | req.rtm.rtm_src_len = IPV6_MAX_BITLEN; | |
2482 | ||
4d3b4b18 MR |
2483 | nl_attr_put(&req.n, sizeof(req), RTA_SRC, |
2484 | &mroute->src.ipaddr_v6, | |
2485 | sizeof(mroute->src.ipaddr_v6)); | |
2486 | nl_attr_put(&req.n, sizeof(req), RTA_DST, | |
2487 | &mroute->grp.ipaddr_v6, | |
2488 | sizeof(mroute->grp.ipaddr_v6)); | |
2489 | } | |
2490 | ||
5523c156 DS |
2491 | /* |
2492 | * What? | |
2493 | * | |
2494 | * So during the namespace cleanup we started storing | |
2495 | * the zvrf table_id for the default table as RT_TABLE_MAIN | |
2496 | * which is what the normal routing table for ip routing is. | |
2497 | * This change caused this to break our lookups of sg data | |
2498 | * because prior to this change the zvrf->table_id was 0 | |
2499 | * and when the pim multicast kernel code saw a 0, | |
2500 | * it was auto-translated to RT_TABLE_DEFAULT. But since | |
2501 | * we are now passing in RT_TABLE_MAIN there is no auto-translation | |
2502 | * and the kernel goes screw you and the delicious cookies you | |
2503 | * are trying to give me. So now we have this little hack. | |
2504 | */ | |
e1cd4bb1 DL |
2505 | if (mroute->family == AF_INET) |
2506 | actual_table = (zvrf->table_id == RT_TABLE_MAIN) | |
2507 | ? RT_TABLE_DEFAULT | |
2508 | : zvrf->table_id; | |
2509 | else | |
2510 | actual_table = zvrf->table_id; | |
2511 | ||
a757997c | 2512 | nl_attr_put32(&req.n, sizeof(req), RTA_TABLE, actual_table); |
e3be0432 | 2513 | |
bd8b9272 | 2514 | suc = netlink_talk(netlink_route_change_read_multicast, &req.n, |
9bfadae8 | 2515 | &zns->netlink_cmd, zns, false); |
e3be0432 | 2516 | |
bd8b9272 | 2517 | mroute = NULL; |
d62a17ae | 2518 | return suc; |
e3be0432 DS |
2519 | } |
2520 | ||
8d03bc50 SW |
2521 | /* Char length to debug ID with */ |
2522 | #define ID_LENGTH 10 | |
2523 | ||
0be6e7d7 | 2524 | static bool _netlink_nexthop_build_group(struct nlmsghdr *n, size_t req_size, |
8d03bc50 | 2525 | uint32_t id, |
e22e8001 | 2526 | const struct nh_grp *z_grp, |
569e1411 DS |
2527 | const uint8_t count, bool resilient, |
2528 | const struct nhg_resilience *nhgr) | |
565ce0d3 | 2529 | { |
565ce0d3 | 2530 | struct nexthop_grp grp[count]; |
8d03bc50 SW |
2531 | /* Need space for max group size, "/", and null term */ |
2532 | char buf[(MULTIPATH_NUM * (ID_LENGTH + 1)) + 1]; | |
2533 | char buf1[ID_LENGTH + 2]; | |
2534 | ||
2535 | buf[0] = '\0'; | |
565ce0d3 SW |
2536 | |
2537 | memset(grp, 0, sizeof(grp)); | |
2538 | ||
2539 | if (count) { | |
0c8215cb | 2540 | for (int i = 0; i < count; i++) { |
e22e8001 | 2541 | grp[i].id = z_grp[i].id; |
df7fb580 | 2542 | grp[i].weight = z_grp[i].weight - 1; |
8d03bc50 SW |
2543 | |
2544 | if (IS_ZEBRA_DEBUG_KERNEL) { | |
2545 | if (i == 0) | |
2546 | snprintf(buf, sizeof(buf1), "group %u", | |
2547 | grp[i].id); | |
2548 | else { | |
2549 | snprintf(buf1, sizeof(buf1), "/%u", | |
2550 | grp[i].id); | |
2551 | strlcat(buf, buf1, sizeof(buf)); | |
2552 | } | |
2553 | } | |
565ce0d3 | 2554 | } |
0be6e7d7 JU |
2555 | if (!nl_attr_put(n, req_size, NHA_GROUP, grp, |
2556 | count * sizeof(*grp))) | |
2557 | return false; | |
569e1411 DS |
2558 | |
2559 | if (resilient) { | |
2560 | struct rtattr *nest; | |
2561 | ||
2562 | nest = nl_attr_nest(n, req_size, NHA_RES_GROUP); | |
2563 | ||
2564 | nl_attr_put16(n, req_size, NHA_RES_GROUP_BUCKETS, | |
2565 | nhgr->buckets); | |
2566 | nl_attr_put32(n, req_size, NHA_RES_GROUP_IDLE_TIMER, | |
2567 | nhgr->idle_timer * 1000); | |
2568 | nl_attr_put32(n, req_size, | |
2569 | NHA_RES_GROUP_UNBALANCED_TIMER, | |
2570 | nhgr->unbalanced_timer * 1000); | |
2571 | nl_attr_nest_end(n, nest); | |
2572 | ||
2573 | nl_attr_put16(n, req_size, NHA_GROUP_TYPE, | |
2574 | NEXTHOP_GRP_TYPE_RES); | |
2575 | } | |
565ce0d3 | 2576 | } |
8d03bc50 SW |
2577 | |
2578 | if (IS_ZEBRA_DEBUG_KERNEL) | |
2579 | zlog_debug("%s: ID (%u): %s", __func__, id, buf); | |
0be6e7d7 JU |
2580 | |
2581 | return true; | |
565ce0d3 SW |
2582 | } |
2583 | ||
f820d025 | 2584 | /** |
e9a1cd93 | 2585 | * Next hop packet encoding helper function. |
f820d025 | 2586 | * |
e9a1cd93 RZ |
2587 | * \param[in] cmd netlink command. |
2588 | * \param[in] ctx dataplane context (information snapshot). | |
2589 | * \param[out] buf buffer to hold the packet. | |
2590 | * \param[in] buflen amount of buffer bytes. | |
f820d025 | 2591 | * |
0be6e7d7 JU |
2592 | * \returns -1 on failure, 0 when the msg doesn't fit entirely in the buffer |
2593 | * otherwise the number of bytes written to buf. | |
f820d025 | 2594 | */ |
0be6e7d7 JU |
2595 | ssize_t netlink_nexthop_msg_encode(uint16_t cmd, |
2596 | const struct zebra_dplane_ctx *ctx, | |
45c12994 | 2597 | void *buf, size_t buflen, bool fpm) |
f820d025 | 2598 | { |
f820d025 SW |
2599 | struct { |
2600 | struct nlmsghdr n; | |
2601 | struct nhmsg nhm; | |
e9a1cd93 RZ |
2602 | char buf[]; |
2603 | } *req = buf; | |
f820d025 | 2604 | |
8d03bc50 SW |
2605 | mpls_lse_t out_lse[MPLS_MAX_LABELS]; |
2606 | char label_buf[256]; | |
2607 | int num_labels = 0; | |
72938edf SW |
2608 | uint32_t id = dplane_ctx_get_nhe_id(ctx); |
2609 | int type = dplane_ctx_get_nhe_type(ctx); | |
bdd085a8 MS |
2610 | struct rtattr *nest; |
2611 | uint16_t encap; | |
d4000d7b DS |
2612 | struct nlsock *nl = |
2613 | kernel_netlink_nlsock_lookup(dplane_ctx_get_ns_sock(ctx)); | |
72938edf SW |
2614 | |
2615 | if (!id) { | |
2616 | flog_err( | |
2617 | EC_ZEBRA_NHG_FIB_UPDATE, | |
2618 | "Failed trying to update a nexthop group in the kernel that does not have an ID"); | |
2619 | return -1; | |
2620 | } | |
81505946 | 2621 | |
6c67f41f SW |
2622 | /* |
2623 | * Nothing to do if the kernel doesn't support nexthop objects or | |
45c12994 YH |
2624 | * we dont want to install this type of NHG, but FPM may possible to |
2625 | * handle this. | |
6c67f41f | 2626 | */ |
45c12994 | 2627 | if (!fpm && !kernel_nexthops_supported()) { |
72938edf SW |
2628 | if (IS_ZEBRA_DEBUG_KERNEL || IS_ZEBRA_DEBUG_NHG) |
2629 | zlog_debug( | |
2630 | "%s: nhg_id %u (%s): kernel nexthops not supported, ignoring", | |
2631 | __func__, id, zebra_route_string(type)); | |
6c67f41f | 2632 | return 0; |
72938edf SW |
2633 | } |
2634 | ||
2635 | if (proto_nexthops_only() && !is_proto_nhg(id, type)) { | |
2636 | if (IS_ZEBRA_DEBUG_KERNEL || IS_ZEBRA_DEBUG_NHG) | |
2637 | zlog_debug( | |
2638 | "%s: nhg_id %u (%s): proto-based nexthops only, ignoring", | |
2639 | __func__, id, zebra_route_string(type)); | |
2640 | return 0; | |
2641 | } | |
6c67f41f | 2642 | |
8d03bc50 SW |
2643 | label_buf[0] = '\0'; |
2644 | ||
0be6e7d7 JU |
2645 | if (buflen < sizeof(*req)) |
2646 | return 0; | |
2647 | ||
2648 | memset(req, 0, sizeof(*req)); | |
f820d025 | 2649 | |
e9a1cd93 RZ |
2650 | req->n.nlmsg_len = NLMSG_LENGTH(sizeof(struct nhmsg)); |
2651 | req->n.nlmsg_flags = NLM_F_CREATE | NLM_F_REQUEST; | |
9a1588c4 SW |
2652 | |
2653 | if (cmd == RTM_NEWNEXTHOP) | |
e9a1cd93 | 2654 | req->n.nlmsg_flags |= NLM_F_REPLACE; |
9a1588c4 | 2655 | |
e9a1cd93 | 2656 | req->n.nlmsg_type = cmd; |
d4000d7b | 2657 | req->n.nlmsg_pid = nl->snl.nl_pid; |
f820d025 | 2658 | |
e9a1cd93 | 2659 | req->nhm.nh_family = AF_UNSPEC; |
fec211ad | 2660 | /* TODO: Scope? */ |
f820d025 | 2661 | |
0be6e7d7 JU |
2662 | if (!nl_attr_put32(&req->n, buflen, NHA_ID, id)) |
2663 | return 0; | |
f820d025 SW |
2664 | |
2665 | if (cmd == RTM_NEWNEXTHOP) { | |
bf1626a6 MS |
2666 | /* |
2667 | * We distinguish between a "group", which is a collection | |
2668 | * of ids, and a singleton nexthop with an id. The | |
2669 | * group is installed as an id that just refers to a list of | |
2670 | * other ids. | |
2671 | */ | |
0be6e7d7 | 2672 | if (dplane_ctx_get_nhe_nh_grp_count(ctx)) { |
569e1411 DS |
2673 | const struct nexthop_group *nhg; |
2674 | const struct nhg_resilience *nhgr; | |
2675 | ||
2676 | nhg = dplane_ctx_get_nhe_ng(ctx); | |
2677 | nhgr = &nhg->nhgr; | |
d52c949b | 2678 | if (!_netlink_nexthop_build_group( |
0be6e7d7 JU |
2679 | &req->n, buflen, id, |
2680 | dplane_ctx_get_nhe_nh_grp(ctx), | |
569e1411 DS |
2681 | dplane_ctx_get_nhe_nh_grp_count(ctx), |
2682 | !!nhgr->buckets, nhgr)) | |
0be6e7d7 JU |
2683 | return 0; |
2684 | } else { | |
0c8215cb SW |
2685 | const struct nexthop *nh = |
2686 | dplane_ctx_get_nhe_ng(ctx)->nexthop; | |
2687 | afi_t afi = dplane_ctx_get_nhe_afi(ctx); | |
e8b0e420 | 2688 | |
0c8215cb | 2689 | if (afi == AFI_IP) |
e9a1cd93 | 2690 | req->nhm.nh_family = AF_INET; |
0c8215cb | 2691 | else if (afi == AFI_IP6) |
e9a1cd93 | 2692 | req->nhm.nh_family = AF_INET6; |
f820d025 | 2693 | |
565ce0d3 | 2694 | switch (nh->type) { |
a6e6a6d8 | 2695 | case NEXTHOP_TYPE_IPV4: |
565ce0d3 | 2696 | case NEXTHOP_TYPE_IPV4_IFINDEX: |
0be6e7d7 JU |
2697 | if (!nl_attr_put(&req->n, buflen, NHA_GATEWAY, |
2698 | &nh->gate.ipv4, | |
2699 | IPV4_MAX_BYTELEN)) | |
2700 | return 0; | |
565ce0d3 | 2701 | break; |
a6e6a6d8 | 2702 | case NEXTHOP_TYPE_IPV6: |
565ce0d3 | 2703 | case NEXTHOP_TYPE_IPV6_IFINDEX: |
0be6e7d7 JU |
2704 | if (!nl_attr_put(&req->n, buflen, NHA_GATEWAY, |
2705 | &nh->gate.ipv6, | |
2706 | IPV6_MAX_BYTELEN)) | |
2707 | return 0; | |
565ce0d3 SW |
2708 | break; |
2709 | case NEXTHOP_TYPE_BLACKHOLE: | |
0be6e7d7 JU |
2710 | if (!nl_attr_put(&req->n, buflen, NHA_BLACKHOLE, |
2711 | NULL, 0)) | |
2712 | return 0; | |
8d03bc50 SW |
2713 | /* Blackhole shouldn't have anymore attributes |
2714 | */ | |
2715 | goto nexthop_done; | |
565ce0d3 SW |
2716 | case NEXTHOP_TYPE_IFINDEX: |
2717 | /* Don't need anymore info for this */ | |
2718 | break; | |
a6e6a6d8 SW |
2719 | } |
2720 | ||
2721 | if (!nh->ifindex) { | |
565ce0d3 SW |
2722 | flog_err( |
2723 | EC_ZEBRA_NHG_FIB_UPDATE, | |
2724 | "Context received for kernel nexthop update without an interface"); | |
2725 | return -1; | |
565ce0d3 SW |
2726 | } |
2727 | ||
0be6e7d7 JU |
2728 | if (!nl_attr_put32(&req->n, buflen, NHA_OIF, |
2729 | nh->ifindex)) | |
2730 | return 0; | |
8d03bc50 | 2731 | |
62d2ecb2 | 2732 | if (CHECK_FLAG(nh->flags, NEXTHOP_FLAG_ONLINK)) |
e9a1cd93 | 2733 | req->nhm.nh_flags |= RTNH_F_ONLINK; |
62d2ecb2 | 2734 | |
5fa6bfff SW |
2735 | num_labels = build_label_stack( |
2736 | nh->nh_label, nh->nh_label_type, out_lse, | |
2737 | label_buf, sizeof(label_buf)); | |
8d03bc50 | 2738 | |
e611f5da SW |
2739 | if (num_labels && nh->nh_label_type == ZEBRA_LSP_EVPN) { |
2740 | if (!nl_attr_put16(&req->n, buflen, | |
2741 | NHA_ENCAP_TYPE, | |
2742 | LWTUNNEL_ENCAP_IP)) | |
2743 | return 0; | |
2744 | ||
2745 | nest = nl_attr_nest(&req->n, buflen, NHA_ENCAP); | |
2746 | if (!nest) | |
2747 | return 0; | |
2748 | ||
2749 | if (_netlink_nexthop_encode_dvni_label( | |
2750 | nh, &req->n, out_lse, buflen, | |
2751 | label_buf) == false) | |
2752 | return 0; | |
2753 | ||
2754 | nl_attr_nest_end(&req->n, nest); | |
2755 | ||
2756 | } else if (num_labels) { | |
8d03bc50 SW |
2757 | /* Set the BoS bit */ |
2758 | out_lse[num_labels - 1] |= | |
2759 | htonl(1 << MPLS_LS_S_SHIFT); | |
2760 | ||
2761 | /* | |
2762 | * TODO: MPLS unsupported for now in kernel. | |
2763 | */ | |
e9a1cd93 | 2764 | if (req->nhm.nh_family == AF_MPLS) |
8d03bc50 | 2765 | goto nexthop_done; |
bdd085a8 MS |
2766 | |
2767 | encap = LWTUNNEL_ENCAP_MPLS; | |
2768 | if (!nl_attr_put16(&req->n, buflen, | |
2769 | NHA_ENCAP_TYPE, encap)) | |
2770 | return 0; | |
2771 | nest = nl_attr_nest(&req->n, buflen, NHA_ENCAP); | |
2772 | if (!nest) | |
2773 | return 0; | |
2774 | if (!nl_attr_put( | |
2775 | &req->n, buflen, MPLS_IPTUNNEL_DST, | |
2776 | &out_lse, | |
2777 | num_labels * sizeof(mpls_lse_t))) | |
2778 | return 0; | |
2779 | ||
2780 | nl_attr_nest_end(&req->n, nest); | |
8d03bc50 SW |
2781 | } |
2782 | ||
eab0f8f0 HS |
2783 | if (nh->nh_srv6) { |
2784 | if (nh->nh_srv6->seg6local_action != | |
2785 | ZEBRA_SEG6_LOCAL_ACTION_UNSPEC) { | |
2786 | uint32_t action; | |
2787 | uint16_t encap; | |
2788 | struct rtattr *nest; | |
2789 | const struct seg6local_context *ctx; | |
2790 | ||
2791 | req->nhm.nh_family = AF_INET6; | |
2792 | action = nh->nh_srv6->seg6local_action; | |
2793 | ctx = &nh->nh_srv6->seg6local_ctx; | |
2794 | encap = LWTUNNEL_ENCAP_SEG6_LOCAL; | |
2795 | if (!nl_attr_put(&req->n, buflen, | |
2796 | NHA_ENCAP_TYPE, | |
2797 | &encap, | |
2798 | sizeof(uint16_t))) | |
2799 | return 0; | |
8689b25a | 2800 | |
eab0f8f0 HS |
2801 | nest = nl_attr_nest(&req->n, buflen, |
2802 | NHA_ENCAP | NLA_F_NESTED); | |
2803 | if (!nest) | |
2804 | return 0; | |
52026569 | 2805 | |
eab0f8f0 HS |
2806 | switch (action) { |
2807 | case SEG6_LOCAL_ACTION_END: | |
2808 | if (!nl_attr_put32( | |
2809 | &req->n, buflen, | |
52026569 HS |
2810 | SEG6_LOCAL_ACTION, |
2811 | SEG6_LOCAL_ACTION_END)) | |
eab0f8f0 HS |
2812 | return 0; |
2813 | break; | |
2814 | case SEG6_LOCAL_ACTION_END_X: | |
2815 | if (!nl_attr_put32( | |
2816 | &req->n, buflen, | |
52026569 HS |
2817 | SEG6_LOCAL_ACTION, |
2818 | SEG6_LOCAL_ACTION_END_X)) | |
eab0f8f0 HS |
2819 | return 0; |
2820 | if (!nl_attr_put( | |
2821 | &req->n, buflen, | |
8689b25a | 2822 | SEG6_LOCAL_NH6, &ctx->nh6, |
52026569 | 2823 | sizeof(struct in6_addr))) |
eab0f8f0 HS |
2824 | return 0; |
2825 | break; | |
2826 | case SEG6_LOCAL_ACTION_END_T: | |
2827 | if (!nl_attr_put32( | |
2828 | &req->n, buflen, | |
52026569 HS |
2829 | SEG6_LOCAL_ACTION, |
2830 | SEG6_LOCAL_ACTION_END_T)) | |
eab0f8f0 HS |
2831 | return 0; |
2832 | if (!nl_attr_put32( | |
2833 | &req->n, buflen, | |
52026569 HS |
2834 | SEG6_LOCAL_TABLE, |
2835 | ctx->table)) | |
eab0f8f0 HS |
2836 | return 0; |
2837 | break; | |
2838 | case SEG6_LOCAL_ACTION_END_DX4: | |
2839 | if (!nl_attr_put32( | |
2840 | &req->n, buflen, | |
52026569 HS |
2841 | SEG6_LOCAL_ACTION, |
2842 | SEG6_LOCAL_ACTION_END_DX4)) | |
eab0f8f0 HS |
2843 | return 0; |
2844 | if (!nl_attr_put( | |
2845 | &req->n, buflen, | |
8689b25a | 2846 | SEG6_LOCAL_NH4, &ctx->nh4, |
52026569 | 2847 | sizeof(struct in_addr))) |
eab0f8f0 HS |
2848 | return 0; |
2849 | break; | |
2850 | case SEG6_LOCAL_ACTION_END_DT6: | |
2851 | if (!nl_attr_put32( | |
2852 | &req->n, buflen, | |
52026569 HS |
2853 | SEG6_LOCAL_ACTION, |
2854 | SEG6_LOCAL_ACTION_END_DT6)) | |
eab0f8f0 HS |
2855 | return 0; |
2856 | if (!nl_attr_put32( | |
2857 | &req->n, buflen, | |
52026569 HS |
2858 | SEG6_LOCAL_TABLE, |
2859 | ctx->table)) | |
eab0f8f0 HS |
2860 | return 0; |
2861 | break; | |
7eab60a7 RS |
2862 | case SEG6_LOCAL_ACTION_END_DT4: |
2863 | if (!nl_attr_put32( | |
2864 | &req->n, buflen, | |
2865 | SEG6_LOCAL_ACTION, | |
2866 | SEG6_LOCAL_ACTION_END_DT4)) | |
2867 | return 0; | |
2868 | if (!nl_attr_put32( | |
2869 | &req->n, buflen, | |
2870 | SEG6_LOCAL_VRFTABLE, | |
2871 | ctx->table)) | |
2872 | return 0; | |
2873 | break; | |
8bea07e4 CS |
2874 | case SEG6_LOCAL_ACTION_END_DT46: |
2875 | if (!nl_attr_put32( | |
2876 | &req->n, buflen, | |
2877 | SEG6_LOCAL_ACTION, | |
2878 | SEG6_LOCAL_ACTION_END_DT46)) | |
2879 | return 0; | |
2880 | if (!nl_attr_put32( | |
2881 | &req->n, buflen, | |
2882 | SEG6_LOCAL_VRFTABLE, | |
2883 | ctx->table)) | |
2884 | return 0; | |
2885 | break; | |
eab0f8f0 HS |
2886 | default: |
2887 | zlog_err("%s: unsupport seg6local behaviour action=%u", | |
2888 | __func__, action); | |
0a543b79 | 2889 | return 0; |
eab0f8f0 HS |
2890 | } |
2891 | nl_attr_nest_end(&req->n, nest); | |
8689b25a | 2892 | } |
8689b25a | 2893 | |
eab0f8f0 HS |
2894 | if (!sid_zero(&nh->nh_srv6->seg6_segs)) { |
2895 | char tun_buf[4096]; | |
2896 | ssize_t tun_len; | |
2897 | struct rtattr *nest; | |
76fb7ae4 | 2898 | |
eab0f8f0 HS |
2899 | if (!nl_attr_put16(&req->n, buflen, |
2900 | NHA_ENCAP_TYPE, | |
2901 | LWTUNNEL_ENCAP_SEG6)) | |
2902 | return 0; | |
2903 | nest = nl_attr_nest(&req->n, buflen, | |
2904 | NHA_ENCAP | NLA_F_NESTED); | |
2905 | if (!nest) | |
2906 | return 0; | |
2907 | tun_len = fill_seg6ipt_encap(tun_buf, | |
2908 | sizeof(tun_buf), | |
2909 | &nh->nh_srv6->seg6_segs); | |
2910 | if (tun_len < 0) | |
2911 | return 0; | |
2912 | if (!nl_attr_put(&req->n, buflen, | |
2913 | SEG6_IPTUNNEL_SRH, | |
2914 | tun_buf, tun_len)) | |
2915 | return 0; | |
2916 | nl_attr_nest_end(&req->n, nest); | |
2917 | } | |
76fb7ae4 HS |
2918 | } |
2919 | ||
bf1626a6 MS |
2920 | nexthop_done: |
2921 | ||
2922 | if (IS_ZEBRA_DEBUG_KERNEL) | |
2c77ddee DS |
2923 | zlog_debug("%s: ID (%u): %pNHv(%d) vrf %s(%u) %s ", |
2924 | __func__, id, nh, nh->ifindex, | |
bd47f3a3 JU |
2925 | vrf_id_to_name(nh->vrf_id), |
2926 | nh->vrf_id, label_buf); | |
bdd085a8 | 2927 | } |
f820d025 | 2928 | |
bdd085a8 | 2929 | req->nhm.nh_protocol = zebra2proto(type); |
f820d025 | 2930 | |
f820d025 SW |
2931 | } else if (cmd != RTM_DELNEXTHOP) { |
2932 | flog_err( | |
2933 | EC_ZEBRA_NHG_FIB_UPDATE, | |
2934 | "Nexthop group kernel update command (%d) does not exist", | |
2935 | cmd); | |
2936 | return -1; | |
2937 | } | |
2938 | ||
9266b315 RZ |
2939 | if (IS_ZEBRA_DEBUG_KERNEL) |
2940 | zlog_debug("%s: %s, id=%u", __func__, nl_msg_type_to_str(cmd), | |
2941 | id); | |
f820d025 | 2942 | |
e9a1cd93 | 2943 | return NLMSG_ALIGN(req->n.nlmsg_len); |
f820d025 SW |
2944 | } |
2945 | ||
67e3369e JU |
2946 | static ssize_t netlink_nexthop_msg_encoder(struct zebra_dplane_ctx *ctx, |
2947 | void *buf, size_t buflen) | |
f820d025 | 2948 | { |
bf1626a6 | 2949 | enum dplane_op_e op; |
98cda54a | 2950 | int cmd = 0; |
f820d025 | 2951 | |
bf1626a6 MS |
2952 | op = dplane_ctx_get_op(ctx); |
2953 | if (op == DPLANE_OP_NH_INSTALL || op == DPLANE_OP_NH_UPDATE) | |
f820d025 | 2954 | cmd = RTM_NEWNEXTHOP; |
bf1626a6 MS |
2955 | else if (op == DPLANE_OP_NH_DELETE) |
2956 | cmd = RTM_DELNEXTHOP; | |
2957 | else { | |
2958 | flog_err(EC_ZEBRA_NHG_FIB_UPDATE, | |
2959 | "Context received for kernel nexthop update with incorrect OP code (%u)", | |
2960 | op); | |
67e3369e | 2961 | return -1; |
f820d025 SW |
2962 | } |
2963 | ||
45c12994 | 2964 | return netlink_nexthop_msg_encode(cmd, ctx, buf, buflen, false); |
67e3369e JU |
2965 | } |
2966 | ||
67e3369e JU |
2967 | enum netlink_msg_status |
2968 | netlink_put_nexthop_update_msg(struct nl_batch *bth, | |
2969 | struct zebra_dplane_ctx *ctx) | |
2970 | { | |
e9a1cd93 RZ |
2971 | /* Nothing to do if the kernel doesn't support nexthop objects */ |
2972 | if (!kernel_nexthops_supported()) | |
67e3369e | 2973 | return FRR_NETLINK_SUCCESS; |
e9a1cd93 | 2974 | |
67e3369e JU |
2975 | return netlink_batch_add_msg(bth, ctx, netlink_nexthop_msg_encoder, |
2976 | false); | |
2977 | } | |
f820d025 | 2978 | |
67e3369e JU |
2979 | static ssize_t netlink_newroute_msg_encoder(struct zebra_dplane_ctx *ctx, |
2980 | void *buf, size_t buflen) | |
2981 | { | |
2982 | return netlink_route_multipath_msg_encode(RTM_NEWROUTE, ctx, buf, | |
2983 | buflen, false, false); | |
f820d025 SW |
2984 | } |
2985 | ||
67e3369e JU |
2986 | static ssize_t netlink_delroute_msg_encoder(struct zebra_dplane_ctx *ctx, |
2987 | void *buf, size_t buflen) | |
2988 | { | |
2989 | return netlink_route_multipath_msg_encode(RTM_DELROUTE, ctx, buf, | |
2990 | buflen, false, false); | |
2991 | } | |
2992 | ||
2993 | enum netlink_msg_status | |
2994 | netlink_put_route_update_msg(struct nl_batch *bth, struct zebra_dplane_ctx *ctx) | |
7cdb1a84 | 2995 | { |
67e3369e | 2996 | int cmd; |
7cdb1a84 MS |
2997 | const struct prefix *p = dplane_ctx_get_dest(ctx); |
2998 | ||
2999 | if (dplane_ctx_get_op(ctx) == DPLANE_OP_ROUTE_DELETE) { | |
3000 | cmd = RTM_DELROUTE; | |
3001 | } else if (dplane_ctx_get_op(ctx) == DPLANE_OP_ROUTE_INSTALL) { | |
3002 | cmd = RTM_NEWROUTE; | |
3003 | } else if (dplane_ctx_get_op(ctx) == DPLANE_OP_ROUTE_UPDATE) { | |
3004 | ||
3005 | if (p->family == AF_INET || v6_rr_semantics) { | |
3006 | /* Single 'replace' operation */ | |
fe5f21af DS |
3007 | |
3008 | /* | |
3009 | * With route replace semantics in place | |
3010 | * for v4 routes and the new route is a system | |
3011 | * route we do not install anything. | |
3012 | * The problem here is that the new system | |
3013 | * route should cause us to withdraw from | |
3014 | * the kernel the old non-system route | |
3015 | */ | |
67e3369e JU |
3016 | if (RSYSTEM_ROUTE(dplane_ctx_get_type(ctx)) |
3017 | && !RSYSTEM_ROUTE(dplane_ctx_get_old_type(ctx))) | |
6b390b3c | 3018 | return netlink_batch_add_msg( |
67e3369e JU |
3019 | bth, ctx, netlink_delroute_msg_encoder, |
3020 | true); | |
7cdb1a84 MS |
3021 | } else { |
3022 | /* | |
3023 | * So v6 route replace semantics are not in | |
3024 | * the kernel at this point as I understand it. | |
3025 | * so let's do a delete then an add. | |
3026 | * In the future once v6 route replace semantics | |
3027 | * are in we can figure out what to do here to | |
3028 | * allow working with old and new kernels. | |
3029 | * | |
3030 | * I'm also intentionally ignoring the failure case | |
3031 | * of the route delete. If that happens yeah we're | |
3032 | * screwed. | |
3033 | */ | |
67e3369e JU |
3034 | if (!RSYSTEM_ROUTE(dplane_ctx_get_old_type(ctx))) |
3035 | netlink_batch_add_msg( | |
3036 | bth, ctx, netlink_delroute_msg_encoder, | |
3037 | true); | |
7cdb1a84 MS |
3038 | } |
3039 | ||
67e3369e JU |
3040 | cmd = RTM_NEWROUTE; |
3041 | } else | |
3042 | return FRR_NETLINK_ERROR; | |
7cdb1a84 | 3043 | |
67e3369e JU |
3044 | if (RSYSTEM_ROUTE(dplane_ctx_get_type(ctx))) |
3045 | return FRR_NETLINK_SUCCESS; | |
0be6e7d7 | 3046 | |
67e3369e JU |
3047 | return netlink_batch_add_msg(bth, ctx, |
3048 | cmd == RTM_NEWROUTE | |
3049 | ? netlink_newroute_msg_encoder | |
3050 | : netlink_delroute_msg_encoder, | |
3051 | false); | |
3052 | } | |
7cdb1a84 | 3053 | |
d9f5b2f5 SW |
3054 | /** |
3055 | * netlink_nexthop_process_nh() - Parse the gatway/if info from a new nexthop | |
3056 | * | |
3057 | * @tb: Netlink RTA data | |
3058 | * @family: Address family in the nhmsg | |
8c0a24c1 | 3059 | * @ifp: Interface connected - this should be NULL, we fill it in |
d9f5b2f5 SW |
3060 | * @ns_id: Namspace id |
3061 | * | |
3062 | * Return: New nexthop | |
3063 | */ | |
e22e8001 SW |
3064 | static struct nexthop netlink_nexthop_process_nh(struct rtattr **tb, |
3065 | unsigned char family, | |
3066 | struct interface **ifp, | |
3067 | ns_id_t ns_id) | |
d9f5b2f5 | 3068 | { |
e22e8001 | 3069 | struct nexthop nh = {}; |
d9f5b2f5 | 3070 | void *gate = NULL; |
8e401b25 | 3071 | enum nexthop_types_t type = 0; |
e22e8001 SW |
3072 | int if_index = 0; |
3073 | size_t sz = 0; | |
7134ba70 | 3074 | struct interface *ifp_lookup; |
d9f5b2f5 SW |
3075 | |
3076 | if_index = *(int *)RTA_DATA(tb[NHA_OIF]); | |
3077 | ||
8e401b25 | 3078 | |
d9f5b2f5 SW |
3079 | if (tb[NHA_GATEWAY]) { |
3080 | switch (family) { | |
3081 | case AF_INET: | |
8e401b25 | 3082 | type = NEXTHOP_TYPE_IPV4_IFINDEX; |
d9f5b2f5 SW |
3083 | sz = 4; |
3084 | break; | |
3085 | case AF_INET6: | |
8e401b25 | 3086 | type = NEXTHOP_TYPE_IPV6_IFINDEX; |
d9f5b2f5 SW |
3087 | sz = 16; |
3088 | break; | |
3089 | default: | |
3090 | flog_warn( | |
3091 | EC_ZEBRA_BAD_NHG_MESSAGE, | |
c4239c05 | 3092 | "Nexthop gateway with bad address family (%d) received from kernel", |
d9f5b2f5 | 3093 | family); |
e22e8001 | 3094 | return nh; |
d9f5b2f5 SW |
3095 | } |
3096 | gate = RTA_DATA(tb[NHA_GATEWAY]); | |
e22e8001 | 3097 | } else |
8e401b25 | 3098 | type = NEXTHOP_TYPE_IFINDEX; |
d9f5b2f5 | 3099 | |
8e401b25 | 3100 | if (type) |
e22e8001 | 3101 | nh.type = type; |
8e401b25 SW |
3102 | |
3103 | if (gate) | |
e22e8001 | 3104 | memcpy(&(nh.gate), gate, sz); |
8e401b25 SW |
3105 | |
3106 | if (if_index) | |
e22e8001 | 3107 | nh.ifindex = if_index; |
8e401b25 | 3108 | |
7134ba70 DS |
3109 | ifp_lookup = |
3110 | if_lookup_by_index_per_ns(zebra_ns_lookup(ns_id), nh.ifindex); | |
3111 | ||
e22e8001 | 3112 | if (ifp) |
7134ba70 DS |
3113 | *ifp = ifp_lookup; |
3114 | if (ifp_lookup) | |
096f7609 | 3115 | nh.vrf_id = ifp_lookup->vrf->vrf_id; |
e22e8001 | 3116 | else { |
d9f5b2f5 SW |
3117 | flog_warn( |
3118 | EC_ZEBRA_UNKNOWN_INTERFACE, | |
3119 | "%s: Unknown nexthop interface %u received, defaulting to VRF_DEFAULT", | |
15569c58 | 3120 | __func__, nh.ifindex); |
d9f5b2f5 | 3121 | |
e22e8001 | 3122 | nh.vrf_id = VRF_DEFAULT; |
d9f5b2f5 SW |
3123 | } |
3124 | ||
3125 | if (tb[NHA_ENCAP] && tb[NHA_ENCAP_TYPE]) { | |
3126 | uint16_t encap_type = *(uint16_t *)RTA_DATA(tb[NHA_ENCAP_TYPE]); | |
3127 | int num_labels = 0; | |
6e728764 | 3128 | |
d9f5b2f5 SW |
3129 | mpls_label_t labels[MPLS_MAX_LABELS] = {0}; |
3130 | ||
e22e8001 | 3131 | if (encap_type == LWTUNNEL_ENCAP_MPLS) |
d9f5b2f5 | 3132 | num_labels = parse_encap_mpls(tb[NHA_ENCAP], labels); |
d9f5b2f5 | 3133 | |
e22e8001 SW |
3134 | if (num_labels) |
3135 | nexthop_add_labels(&nh, ZEBRA_LSP_STATIC, num_labels, | |
d9f5b2f5 | 3136 | labels); |
d9f5b2f5 SW |
3137 | } |
3138 | ||
3139 | return nh; | |
3140 | } | |
3141 | ||
85f5e761 | 3142 | static int netlink_nexthop_process_group(struct rtattr **tb, |
569e1411 DS |
3143 | struct nh_grp *z_grp, int z_grp_size, |
3144 | struct nhg_resilience *nhgr) | |
d9f5b2f5 | 3145 | { |
e22e8001 SW |
3146 | uint8_t count = 0; |
3147 | /* linux/nexthop.h group struct */ | |
d9f5b2f5 SW |
3148 | struct nexthop_grp *n_grp = NULL; |
3149 | ||
85f5e761 | 3150 | n_grp = (struct nexthop_grp *)RTA_DATA(tb[NHA_GROUP]); |
d9f5b2f5 SW |
3151 | count = (RTA_PAYLOAD(tb[NHA_GROUP]) / sizeof(*n_grp)); |
3152 | ||
3153 | if (!count || (count * sizeof(*n_grp)) != RTA_PAYLOAD(tb[NHA_GROUP])) { | |
3154 | flog_warn(EC_ZEBRA_BAD_NHG_MESSAGE, | |
3155 | "Invalid nexthop group received from the kernel"); | |
85f5e761 | 3156 | return count; |
d9f5b2f5 SW |
3157 | } |
3158 | ||
5a935f79 | 3159 | for (int i = 0; ((i < count) && (i < z_grp_size)); i++) { |
e22e8001 | 3160 | z_grp[i].id = n_grp[i].id; |
df7fb580 | 3161 | z_grp[i].weight = n_grp[i].weight + 1; |
85f5e761 | 3162 | } |
569e1411 DS |
3163 | |
3164 | memset(nhgr, 0, sizeof(*nhgr)); | |
3165 | if (tb[NHA_RES_GROUP]) { | |
3166 | struct rtattr *tbn[NHA_RES_GROUP_MAX + 1]; | |
3167 | struct rtattr *rta; | |
3168 | struct rtattr *res_group = tb[NHA_RES_GROUP]; | |
3169 | ||
3170 | netlink_parse_rtattr_nested(tbn, NHA_RES_GROUP_MAX, res_group); | |
3171 | ||
3172 | if (tbn[NHA_RES_GROUP_BUCKETS]) { | |
3173 | rta = tbn[NHA_RES_GROUP_BUCKETS]; | |
3174 | nhgr->buckets = *(uint16_t *)RTA_DATA(rta); | |
3175 | } | |
3176 | ||
3177 | if (tbn[NHA_RES_GROUP_IDLE_TIMER]) { | |
3178 | rta = tbn[NHA_RES_GROUP_IDLE_TIMER]; | |
3179 | nhgr->idle_timer = *(uint32_t *)RTA_DATA(rta); | |
3180 | } | |
3181 | ||
3182 | if (tbn[NHA_RES_GROUP_UNBALANCED_TIMER]) { | |
3183 | rta = tbn[NHA_RES_GROUP_UNBALANCED_TIMER]; | |
3184 | nhgr->unbalanced_timer = *(uint32_t *)RTA_DATA(rta); | |
3185 | } | |
3186 | ||
3187 | if (tbn[NHA_RES_GROUP_UNBALANCED_TIME]) { | |
3188 | rta = tbn[NHA_RES_GROUP_UNBALANCED_TIME]; | |
3189 | nhgr->unbalanced_time = *(uint64_t *)RTA_DATA(rta); | |
3190 | } | |
3191 | } | |
3192 | ||
d9f5b2f5 SW |
3193 | return count; |
3194 | } | |
3195 | ||
3196 | /** | |
3197 | * netlink_nexthop_change() - Read in change about nexthops from the kernel | |
3198 | * | |
3199 | * @h: Netlink message header | |
3200 | * @ns_id: Namspace id | |
3201 | * @startup: Are we reading under startup conditions? | |
3202 | * | |
3203 | * Return: Result status | |
3204 | */ | |
3205 | int netlink_nexthop_change(struct nlmsghdr *h, ns_id_t ns_id, int startup) | |
3206 | { | |
3207 | int len; | |
3208 | /* nexthop group id */ | |
3209 | uint32_t id; | |
3210 | unsigned char family; | |
38e40db1 | 3211 | int type; |
e8b0e420 | 3212 | afi_t afi = AFI_UNSPEC; |
946de1b9 | 3213 | vrf_id_t vrf_id = VRF_DEFAULT; |
8c0a24c1 | 3214 | struct interface *ifp = NULL; |
d9f5b2f5 | 3215 | struct nhmsg *nhm = NULL; |
e22e8001 SW |
3216 | struct nexthop nh = {}; |
3217 | struct nh_grp grp[MULTIPATH_NUM] = {}; | |
85f5e761 | 3218 | /* Count of nexthops in group array */ |
e22e8001 | 3219 | uint8_t grp_count = 0; |
e22e8001 | 3220 | struct rtattr *tb[NHA_MAX + 1] = {}; |
d9f5b2f5 | 3221 | |
1d80c209 DS |
3222 | frrtrace(3, frr_zebra, netlink_nexthop_change, h, ns_id, startup); |
3223 | ||
d9f5b2f5 SW |
3224 | nhm = NLMSG_DATA(h); |
3225 | ||
88cafda7 DS |
3226 | if (ns_id) |
3227 | vrf_id = ns_id; | |
3228 | ||
d9f5b2f5 SW |
3229 | if (startup && h->nlmsg_type != RTM_NEWNEXTHOP) |
3230 | return 0; | |
3231 | ||
3232 | len = h->nlmsg_len - NLMSG_LENGTH(sizeof(struct nhmsg)); | |
3233 | if (len < 0) { | |
3234 | zlog_warn( | |
3235 | "%s: Message received from netlink is of a broken size %d %zu", | |
15569c58 | 3236 | __func__, h->nlmsg_len, |
d9f5b2f5 SW |
3237 | (size_t)NLMSG_LENGTH(sizeof(struct nhmsg))); |
3238 | return -1; | |
3239 | } | |
3240 | ||
6e1e2e8d DS |
3241 | netlink_parse_rtattr_flags(tb, NHA_MAX, RTM_NHA(nhm), len, |
3242 | NLA_F_NESTED); | |
d9f5b2f5 SW |
3243 | |
3244 | ||
3245 | if (!tb[NHA_ID]) { | |
3246 | flog_warn( | |
3247 | EC_ZEBRA_BAD_NHG_MESSAGE, | |
3248 | "Nexthop group without an ID received from the kernel"); | |
3249 | return -1; | |
3250 | } | |
3251 | ||
3252 | /* We use the ID key'd nhg table for kernel updates */ | |
3253 | id = *((uint32_t *)RTA_DATA(tb[NHA_ID])); | |
d9f5b2f5 | 3254 | |
506efd37 AK |
3255 | if (zebra_evpn_mh_is_fdb_nh(id)) { |
3256 | /* If this is a L2 NH just ignore it */ | |
3257 | if (IS_ZEBRA_DEBUG_KERNEL || IS_ZEBRA_DEBUG_EVPN_MH_NH) { | |
3258 | zlog_debug("Ignore kernel update (%u) for fdb-nh 0x%x", | |
3259 | h->nlmsg_type, id); | |
3260 | } | |
3261 | return 0; | |
3262 | } | |
3263 | ||
e8b0e420 | 3264 | family = nhm->nh_family; |
e8b0e420 SW |
3265 | afi = family2afi(family); |
3266 | ||
38e40db1 SW |
3267 | type = proto2zebra(nhm->nh_protocol, 0, true); |
3268 | ||
fdee485a SW |
3269 | if (IS_ZEBRA_DEBUG_KERNEL) |
3270 | zlog_debug("%s ID (%u) %s NS %u", | |
3271 | nl_msg_type_to_str(h->nlmsg_type), id, | |
3272 | nl_family_to_str(family), ns_id); | |
3273 | ||
3274 | ||
d9f5b2f5 | 3275 | if (h->nlmsg_type == RTM_NEWNEXTHOP) { |
569e1411 DS |
3276 | struct nhg_resilience nhgr = {}; |
3277 | ||
d9f5b2f5 SW |
3278 | if (tb[NHA_GROUP]) { |
3279 | /** | |
3280 | * If this is a group message its only going to have | |
3281 | * an array of nexthop IDs associated with it | |
3282 | */ | |
5a935f79 | 3283 | grp_count = netlink_nexthop_process_group( |
569e1411 | 3284 | tb, grp, array_size(grp), &nhgr); |
85f5e761 SW |
3285 | } else { |
3286 | if (tb[NHA_BLACKHOLE]) { | |
3287 | /** | |
3288 | * This nexthop is just for blackhole-ing | |
3289 | * traffic, it should not have an OIF, GATEWAY, | |
3290 | * or ENCAP | |
3291 | */ | |
e22e8001 SW |
3292 | nh.type = NEXTHOP_TYPE_BLACKHOLE; |
3293 | nh.bh_type = BLACKHOLE_UNSPEC; | |
3294 | } else if (tb[NHA_OIF]) | |
85f5e761 SW |
3295 | /** |
3296 | * This is a true new nexthop, so we need | |
3297 | * to parse the gateway and device info | |
3298 | */ | |
3299 | nh = netlink_nexthop_process_nh(tb, family, | |
3300 | &ifp, ns_id); | |
e22e8001 SW |
3301 | else { |
3302 | ||
8e401b25 SW |
3303 | flog_warn( |
3304 | EC_ZEBRA_BAD_NHG_MESSAGE, | |
3305 | "Invalid Nexthop message received from the kernel with ID (%u)", | |
3306 | id); | |
3307 | return -1; | |
3308 | } | |
e22e8001 SW |
3309 | SET_FLAG(nh.flags, NEXTHOP_FLAG_ACTIVE); |
3310 | if (nhm->nh_flags & RTNH_F_ONLINK) | |
3311 | SET_FLAG(nh.flags, NEXTHOP_FLAG_ONLINK); | |
3312 | vrf_id = nh.vrf_id; | |
d9f5b2f5 SW |
3313 | } |
3314 | ||
38e40db1 | 3315 | if (zebra_nhg_kernel_find(id, &nh, grp, grp_count, vrf_id, afi, |
569e1411 | 3316 | type, startup, &nhgr)) |
e22e8001 | 3317 | return -1; |
8e401b25 | 3318 | |
9a1588c4 | 3319 | } else if (h->nlmsg_type == RTM_DELNEXTHOP) |
88cafda7 | 3320 | zebra_nhg_kernel_del(id, vrf_id); |
d9f5b2f5 | 3321 | |
d9f5b2f5 SW |
3322 | return 0; |
3323 | } | |
3324 | ||
3325 | /** | |
3326 | * netlink_request_nexthop() - Request nextop information from the kernel | |
3327 | * @zns: Zebra namespace | |
3328 | * @family: AF_* netlink family | |
3329 | * @type: RTM_* route type | |
3330 | * | |
3331 | * Return: Result status | |
3332 | */ | |
3333 | static int netlink_request_nexthop(struct zebra_ns *zns, int family, int type) | |
3334 | { | |
3335 | struct { | |
3336 | struct nlmsghdr n; | |
3337 | struct nhmsg nhm; | |
3338 | } req; | |
3339 | ||
3340 | /* Form the request, specifying filter (rtattr) if needed. */ | |
3341 | memset(&req, 0, sizeof(req)); | |
3342 | req.n.nlmsg_type = type; | |
3343 | req.n.nlmsg_flags = NLM_F_ROOT | NLM_F_MATCH | NLM_F_REQUEST; | |
3344 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct nhmsg)); | |
3345 | req.nhm.nh_family = family; | |
3346 | ||
fd3f8e52 | 3347 | return netlink_request(&zns->netlink_cmd, &req); |
d9f5b2f5 SW |
3348 | } |
3349 | ||
7d5bb02b | 3350 | |
d9f5b2f5 SW |
3351 | /** |
3352 | * netlink_nexthop_read() - Nexthop read function using netlink interface | |
3353 | * | |
3354 | * @zns: Zebra name space | |
3355 | * | |
3356 | * Return: Result status | |
3357 | * Only called at bootstrap time. | |
3358 | */ | |
3359 | int netlink_nexthop_read(struct zebra_ns *zns) | |
3360 | { | |
3361 | int ret; | |
3362 | struct zebra_dplane_info dp_info; | |
3363 | ||
3364 | zebra_dplane_info_from_zns(&dp_info, zns, true /*is_cmd*/); | |
3365 | ||
3366 | /* Get nexthop objects */ | |
3367 | ret = netlink_request_nexthop(zns, AF_UNSPEC, RTM_GETNEXTHOP); | |
3368 | if (ret < 0) | |
3369 | return ret; | |
3370 | ret = netlink_parse_info(netlink_nexthop_change, &zns->netlink_cmd, | |
9bfadae8 | 3371 | &dp_info, 0, true); |
81505946 SW |
3372 | |
3373 | if (!ret) | |
3374 | /* If we succesfully read in nexthop objects, | |
3375 | * this kernel must support them. | |
3376 | */ | |
3377 | supports_nh = true; | |
7c99d51b MS |
3378 | if (IS_ZEBRA_DEBUG_KERNEL || IS_ZEBRA_DEBUG_NHG) |
3379 | zlog_debug("Nexthop objects %ssupported on this kernel", | |
3380 | supports_nh ? "" : "not "); | |
090ee856 DS |
3381 | |
3382 | zebra_router_set_supports_nhgs(supports_nh); | |
81505946 | 3383 | |
60e0eaee | 3384 | return ret; |
d9f5b2f5 SW |
3385 | } |
3386 | ||
3387 | ||
05657ec2 PG |
3388 | int kernel_neigh_update(int add, int ifindex, void *addr, char *lla, int llalen, |
3389 | ns_id_t ns_id, uint8_t family, bool permanent) | |
6b8a5694 | 3390 | { |
d62a17ae | 3391 | return netlink_neigh_update(add ? RTM_NEWNEIGH : RTM_DELNEIGH, ifindex, |
05657ec2 PG |
3392 | addr, lla, llalen, ns_id, family, permanent, |
3393 | RTPROT_ZEBRA); | |
6b8a5694 | 3394 | } |
718e3744 | 3395 | |
340845e2 | 3396 | /** |
0be6e7d7 JU |
3397 | * netlink_neigh_update_msg_encode() - Common helper api for encoding |
3398 | * evpn neighbor update as netlink messages using dataplane context object. | |
bbd4285b | 3399 | * Here, a neighbor refers to a bridge forwarding database entry for |
3400 | * either unicast forwarding or head-end replication or an IP neighbor | |
3401 | * entry. | |
340845e2 JU |
3402 | * @ctx: Dataplane context |
3403 | * @cmd: Netlink command (RTM_NEWNEIGH or RTM_DELNEIGH) | |
0a27a2fe PG |
3404 | * @lla: A pointer to neighbor cache link layer address |
3405 | * @llalen: Length of the pointer to neighbor cache link layer | |
3406 | * address | |
340845e2 | 3407 | * @ip: A neighbor cache n/w layer destination address |
bbd4285b | 3408 | * In the case of bridge FDB, this represnts the remote |
3409 | * VTEP IP. | |
340845e2 JU |
3410 | * @replace_obj: Whether NEW request should replace existing object or |
3411 | * add to the end of the list | |
3412 | * @family: AF_* netlink family | |
3413 | * @type: RTN_* route type | |
3414 | * @flags: NTF_* flags | |
3415 | * @state: NUD_* states | |
d4d4ec1c RZ |
3416 | * @data: data buffer pointer |
3417 | * @datalen: total amount of data buffer space | |
0a27a2fe | 3418 | * @protocol: protocol information |
340845e2 | 3419 | * |
0be6e7d7 JU |
3420 | * Return: 0 when the msg doesn't fit entirely in the buffer |
3421 | * otherwise the number of bytes written to buf. | |
13d60d35 | 3422 | */ |
0be6e7d7 | 3423 | static ssize_t netlink_neigh_update_msg_encode( |
0a27a2fe PG |
3424 | const struct zebra_dplane_ctx *ctx, int cmd, const void *lla, |
3425 | int llalen, const struct ipaddr *ip, bool replace_obj, uint8_t family, | |
3426 | uint8_t type, uint8_t flags, uint16_t state, uint32_t nhg_id, bool nfy, | |
ccd187cd | 3427 | uint8_t nfy_flags, bool ext, uint32_t ext_flags, void *data, |
0a27a2fe | 3428 | size_t datalen, uint8_t protocol) |
13d60d35 | 3429 | { |
d62a17ae | 3430 | struct { |
3431 | struct nlmsghdr n; | |
3432 | struct ndmsg ndm; | |
d4d4ec1c RZ |
3433 | char buf[]; |
3434 | } *req = data; | |
340845e2 JU |
3435 | int ipa_len; |
3436 | enum dplane_op_e op; | |
d62a17ae | 3437 | |
0be6e7d7 JU |
3438 | if (datalen < sizeof(*req)) |
3439 | return 0; | |
45c80fbd | 3440 | memset(req, 0, sizeof(*req)); |
d62a17ae | 3441 | |
340845e2 JU |
3442 | op = dplane_ctx_get_op(ctx); |
3443 | ||
d4d4ec1c RZ |
3444 | req->n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)); |
3445 | req->n.nlmsg_flags = NLM_F_REQUEST; | |
d62a17ae | 3446 | if (cmd == RTM_NEWNEIGH) |
d4d4ec1c | 3447 | req->n.nlmsg_flags |= |
340845e2 JU |
3448 | NLM_F_CREATE |
3449 | | (replace_obj ? NLM_F_REPLACE : NLM_F_APPEND); | |
d4d4ec1c RZ |
3450 | req->n.nlmsg_type = cmd; |
3451 | req->ndm.ndm_family = family; | |
3452 | req->ndm.ndm_type = type; | |
3453 | req->ndm.ndm_state = state; | |
3454 | req->ndm.ndm_flags = flags; | |
3455 | req->ndm.ndm_ifindex = dplane_ctx_get_ifindex(ctx); | |
d62a17ae | 3456 | |
45c80fbd | 3457 | if (!nl_attr_put(&req->n, datalen, NDA_PROTOCOL, &protocol, |
0be6e7d7 JU |
3458 | sizeof(protocol))) |
3459 | return 0; | |
3460 | ||
0a27a2fe PG |
3461 | if (lla) { |
3462 | if (!nl_attr_put(&req->n, datalen, NDA_LLADDR, lla, llalen)) | |
0be6e7d7 JU |
3463 | return 0; |
3464 | } | |
13d60d35 | 3465 | |
f188e68e | 3466 | if (nfy) { |
4bcdb608 NA |
3467 | struct rtattr *nest; |
3468 | ||
3469 | nest = nl_attr_nest(&req->n, datalen, | |
3470 | NDA_FDB_EXT_ATTRS | NLA_F_NESTED); | |
3471 | if (!nest) | |
3472 | return 0; | |
3473 | ||
3474 | if (!nl_attr_put(&req->n, datalen, NFEA_ACTIVITY_NOTIFY, | |
3475 | &nfy_flags, sizeof(nfy_flags))) | |
f188e68e | 3476 | return 0; |
4bcdb608 NA |
3477 | if (!nl_attr_put(&req->n, datalen, NFEA_DONT_REFRESH, NULL, 0)) |
3478 | return 0; | |
3479 | ||
3480 | nl_attr_nest_end(&req->n, nest); | |
f188e68e | 3481 | } |
506efd37 | 3482 | |
4bcdb608 | 3483 | |
ccd187cd AK |
3484 | if (ext) { |
3485 | if (!nl_attr_put(&req->n, datalen, NDA_EXT_FLAGS, &ext_flags, | |
3486 | sizeof(ext_flags))) | |
3487 | return 0; | |
3488 | } | |
3489 | ||
80e19eb7 AK |
3490 | if (nhg_id) { |
3491 | if (!nl_attr_put32(&req->n, datalen, NDA_NH_ID, nhg_id)) | |
3492 | return 0; | |
3493 | } else { | |
3494 | ipa_len = | |
3495 | IS_IPADDR_V4(ip) ? IPV4_MAX_BYTELEN : IPV6_MAX_BYTELEN; | |
3496 | if (!nl_attr_put(&req->n, datalen, NDA_DST, &ip->ip.addr, | |
3497 | ipa_len)) | |
3498 | return 0; | |
3499 | } | |
340845e2 JU |
3500 | |
3501 | if (op == DPLANE_OP_MAC_INSTALL || op == DPLANE_OP_MAC_DELETE) { | |
3502 | vlanid_t vid = dplane_ctx_mac_get_vlan(ctx); | |
b95ce8fa | 3503 | vni_t vni = dplane_ctx_mac_get_vni(ctx); |
13d60d35 | 3504 | |
0be6e7d7 JU |
3505 | if (vid > 0) { |
3506 | if (!nl_attr_put16(&req->n, datalen, NDA_VLAN, vid)) | |
3507 | return 0; | |
3508 | } | |
13d60d35 | 3509 | |
b95ce8fa SR |
3510 | if (vni > 0) { |
3511 | if (!nl_attr_put32(&req->n, datalen, NDA_SRC_VNI, vni)) | |
3512 | return 0; | |
3513 | } | |
3514 | ||
0be6e7d7 JU |
3515 | if (!nl_attr_put32(&req->n, datalen, NDA_MASTER, |
3516 | dplane_ctx_mac_get_br_ifindex(ctx))) | |
3517 | return 0; | |
340845e2 | 3518 | } |
13d60d35 | 3519 | |
b95ce8fa SR |
3520 | if (op == DPLANE_OP_VTEP_ADD || op == DPLANE_OP_VTEP_DELETE) { |
3521 | vni_t vni = dplane_ctx_neigh_get_vni(ctx); | |
3522 | ||
3523 | if (vni > 0) { | |
3524 | if (!nl_attr_put32(&req->n, datalen, NDA_SRC_VNI, vni)) | |
3525 | return 0; | |
3526 | } | |
3527 | } | |
3528 | ||
d4d4ec1c | 3529 | return NLMSG_ALIGN(req->n.nlmsg_len); |
13d60d35 | 3530 | } |
3531 | ||
340845e2 JU |
3532 | /* |
3533 | * Add remote VTEP to the flood list for this VxLAN interface (VNI). This | |
3534 | * is done by adding an FDB entry with a MAC of 00:00:00:00:00:00. | |
3535 | */ | |
67e3369e JU |
3536 | static ssize_t |
3537 | netlink_vxlan_flood_update_ctx(const struct zebra_dplane_ctx *ctx, int cmd, | |
3538 | void *buf, size_t buflen) | |
340845e2 JU |
3539 | { |
3540 | struct ethaddr dst_mac = {.octet = {0}}; | |
88217099 PG |
3541 | int proto = RTPROT_ZEBRA; |
3542 | ||
3543 | if (dplane_ctx_get_type(ctx) != 0) | |
3544 | proto = zebra2proto(dplane_ctx_get_type(ctx)); | |
d4d4ec1c | 3545 | |
67e3369e | 3546 | return netlink_neigh_update_msg_encode( |
0a27a2fe PG |
3547 | ctx, cmd, (const void *)&dst_mac, ETH_ALEN, |
3548 | dplane_ctx_neigh_get_ipaddr(ctx), false, PF_BRIDGE, 0, NTF_SELF, | |
3549 | (NUD_NOARP | NUD_PERMANENT), 0 /*nhg*/, false /*nfy*/, | |
3550 | 0 /*nfy_flags*/, false /*ext*/, 0 /*ext_flags*/, buf, buflen, | |
88217099 | 3551 | proto); |
340845e2 JU |
3552 | } |
3553 | ||
2232a77c | 3554 | #ifndef NDA_RTA |
d62a17ae | 3555 | #define NDA_RTA(r) \ |
3556 | ((struct rtattr *)(((char *)(r)) + NLMSG_ALIGN(sizeof(struct ndmsg)))) | |
2232a77c | 3557 | #endif |
3558 | ||
2414abd3 | 3559 | static int netlink_macfdb_change(struct nlmsghdr *h, int len, ns_id_t ns_id) |
2232a77c | 3560 | { |
d62a17ae | 3561 | struct ndmsg *ndm; |
3562 | struct interface *ifp; | |
3563 | struct zebra_if *zif; | |
d62a17ae | 3564 | struct rtattr *tb[NDA_MAX + 1]; |
3565 | struct interface *br_if; | |
3566 | struct ethaddr mac; | |
3567 | vlanid_t vid = 0; | |
4b3f26f4 | 3568 | struct in_addr vtep_ip; |
d62a17ae | 3569 | int vid_present = 0, dst_present = 0; |
d62a17ae | 3570 | char vid_buf[20]; |
3571 | char dst_buf[30]; | |
a37f4598 | 3572 | bool sticky; |
f188e68e AK |
3573 | bool local_inactive = false; |
3574 | bool dp_static = false; | |
784d88aa | 3575 | vni_t vni = 0; |
f188e68e | 3576 | uint32_t nhg_id = 0; |
784d88aa | 3577 | bool vni_mcast_grp = false; |
d62a17ae | 3578 | |
3579 | ndm = NLMSG_DATA(h); | |
3580 | ||
2853fed6 | 3581 | /* We only process macfdb notifications if EVPN is enabled */ |
3582 | if (!is_evpn_enabled()) | |
3583 | return 0; | |
3584 | ||
4b3f26f4 | 3585 | /* Parse attributes and extract fields of interest. Do basic |
3586 | * validation of the fields. | |
3587 | */ | |
4bcdb608 NA |
3588 | netlink_parse_rtattr_flags(tb, NDA_MAX, NDA_RTA(ndm), len, |
3589 | NLA_F_NESTED); | |
d62a17ae | 3590 | |
3591 | if (!tb[NDA_LLADDR]) { | |
28bd0652 | 3592 | if (IS_ZEBRA_DEBUG_KERNEL) |
4b3f26f4 | 3593 | zlog_debug("%s AF_BRIDGE IF %u - no LLADDR", |
28bd0652 | 3594 | nl_msg_type_to_str(h->nlmsg_type), |
4b3f26f4 | 3595 | ndm->ndm_ifindex); |
d62a17ae | 3596 | return 0; |
3597 | } | |
3598 | ||
ff8b7eb8 | 3599 | if (RTA_PAYLOAD(tb[NDA_LLADDR]) != ETH_ALEN) { |
28bd0652 DS |
3600 | if (IS_ZEBRA_DEBUG_KERNEL) |
3601 | zlog_debug( | |
4b3f26f4 | 3602 | "%s AF_BRIDGE IF %u - LLADDR is not MAC, len %lu", |
3603 | nl_msg_type_to_str(h->nlmsg_type), ndm->ndm_ifindex, | |
28bd0652 | 3604 | (unsigned long)RTA_PAYLOAD(tb[NDA_LLADDR])); |
d62a17ae | 3605 | return 0; |
3606 | } | |
3607 | ||
ff8b7eb8 | 3608 | memcpy(&mac, RTA_DATA(tb[NDA_LLADDR]), ETH_ALEN); |
d62a17ae | 3609 | |
2be18df4 | 3610 | if (tb[NDA_VLAN]) { |
d62a17ae | 3611 | vid_present = 1; |
d7c0a89a | 3612 | vid = *(uint16_t *)RTA_DATA(tb[NDA_VLAN]); |
772270f3 | 3613 | snprintf(vid_buf, sizeof(vid_buf), " VLAN %u", vid); |
d62a17ae | 3614 | } |
3615 | ||
3616 | if (tb[NDA_DST]) { | |
3617 | /* TODO: Only IPv4 supported now. */ | |
3618 | dst_present = 1; | |
4b3f26f4 | 3619 | memcpy(&vtep_ip.s_addr, RTA_DATA(tb[NDA_DST]), |
d62a17ae | 3620 | IPV4_MAX_BYTELEN); |
9bcef951 MS |
3621 | snprintfrr(dst_buf, sizeof(dst_buf), " dst %pI4", |
3622 | &vtep_ip); | |
e8a392d9 SR |
3623 | } else |
3624 | memset(&vtep_ip, 0, sizeof(vtep_ip)); | |
d62a17ae | 3625 | |
f188e68e AK |
3626 | if (tb[NDA_NH_ID]) |
3627 | nhg_id = *(uint32_t *)RTA_DATA(tb[NDA_NH_ID]); | |
3628 | ||
3629 | if (ndm->ndm_state & NUD_STALE) | |
3630 | local_inactive = true; | |
3631 | ||
4bcdb608 NA |
3632 | if (tb[NDA_FDB_EXT_ATTRS]) { |
3633 | struct rtattr *attr = tb[NDA_FDB_EXT_ATTRS]; | |
3634 | struct rtattr *nfea_tb[NFEA_MAX + 1] = {0}; | |
3635 | ||
3636 | netlink_parse_rtattr_nested(nfea_tb, NFEA_MAX, attr); | |
3637 | if (nfea_tb[NFEA_ACTIVITY_NOTIFY]) { | |
3638 | uint8_t nfy_flags; | |
f188e68e | 3639 | |
4bcdb608 NA |
3640 | nfy_flags = *(uint8_t *)RTA_DATA( |
3641 | nfea_tb[NFEA_ACTIVITY_NOTIFY]); | |
3642 | if (nfy_flags & FDB_NOTIFY_BIT) | |
3643 | dp_static = true; | |
3644 | if (nfy_flags & FDB_NOTIFY_INACTIVE_BIT) | |
3645 | local_inactive = true; | |
3646 | } | |
f188e68e AK |
3647 | } |
3648 | ||
784d88aa SR |
3649 | if (tb[NDA_SRC_VNI]) |
3650 | vni = *(vni_t *)RTA_DATA(tb[NDA_SRC_VNI]); | |
3651 | ||
d62a17ae | 3652 | if (IS_ZEBRA_DEBUG_KERNEL) |
784d88aa SR |
3653 | zlog_debug( |
3654 | "Rx %s AF_BRIDGE IF %u%s st 0x%x fl 0x%x MAC %pEA%s nhg %d vni %d", | |
3655 | nl_msg_type_to_str(h->nlmsg_type), ndm->ndm_ifindex, | |
3656 | vid_present ? vid_buf : "", ndm->ndm_state, | |
3657 | ndm->ndm_flags, &mac, dst_present ? dst_buf : "", | |
3658 | nhg_id, vni); | |
d62a17ae | 3659 | |
4b3f26f4 | 3660 | /* The interface should exist. */ |
3661 | ifp = if_lookup_by_index_per_ns(zebra_ns_lookup(ns_id), | |
3662 | ndm->ndm_ifindex); | |
3663 | if (!ifp || !ifp->info) | |
3664 | return 0; | |
3665 | ||
3666 | /* The interface should be something we're interested in. */ | |
3667 | if (!IS_ZEBRA_IF_BRIDGE_SLAVE(ifp)) | |
3668 | return 0; | |
3669 | ||
3670 | zif = (struct zebra_if *)ifp->info; | |
3671 | if ((br_if = zif->brslave_info.br_if) == NULL) { | |
3672 | if (IS_ZEBRA_DEBUG_KERNEL) | |
3673 | zlog_debug( | |
3674 | "%s AF_BRIDGE IF %s(%u) brIF %u - no bridge master", | |
3675 | nl_msg_type_to_str(h->nlmsg_type), ifp->name, | |
3676 | ndm->ndm_ifindex, | |
3677 | zif->brslave_info.bridge_ifindex); | |
3678 | return 0; | |
3679 | } | |
3680 | ||
784d88aa SR |
3681 | /* For per vni device, vni comes from device itself */ |
3682 | if (IS_ZEBRA_IF_VXLAN(ifp) && IS_ZEBRA_VXLAN_IF_VNI(zif)) { | |
3683 | struct zebra_vxlan_vni *vnip; | |
9464e5b8 | 3684 | |
784d88aa SR |
3685 | vnip = zebra_vxlan_if_vni_find(zif, 0); |
3686 | vni = vnip->vni; | |
3687 | } | |
3688 | ||
f188e68e | 3689 | sticky = !!(ndm->ndm_flags & NTF_STICKY); |
4b3f26f4 | 3690 | |
28bd0652 DS |
3691 | if (filter_vlan && vid != filter_vlan) { |
3692 | if (IS_ZEBRA_DEBUG_KERNEL) | |
d6951e5e | 3693 | zlog_debug(" Filtered due to filter vlan: %d", |
28bd0652 | 3694 | filter_vlan); |
d62a17ae | 3695 | return 0; |
28bd0652 | 3696 | } |
d62a17ae | 3697 | |
784d88aa SR |
3698 | /* |
3699 | * Check if this is a mcast group update (svd case) | |
3700 | */ | |
3701 | vni_mcast_grp = is_mac_vni_mcast_group(&mac, vni, vtep_ip); | |
3702 | ||
d62a17ae | 3703 | /* If add or update, do accordingly if learnt on a "local" interface; if |
3704 | * the notification is over VxLAN, this has to be related to | |
3705 | * multi-homing, | |
3706 | * so perform an implicit delete of any local entry (if it exists). | |
3707 | */ | |
3708 | if (h->nlmsg_type == RTM_NEWNEIGH) { | |
4b3f26f4 | 3709 | /* Drop "permanent" entries. */ |
784d88aa | 3710 | if (!vni_mcast_grp && (ndm->ndm_state & NUD_PERMANENT)) { |
4b3f26f4 | 3711 | if (IS_ZEBRA_DEBUG_KERNEL) |
d6951e5e DL |
3712 | zlog_debug( |
3713 | " Dropping entry because of NUD_PERMANENT"); | |
3714 | return 0; | |
4b3f26f4 | 3715 | } |
3716 | ||
784d88aa SR |
3717 | if (IS_ZEBRA_IF_VXLAN(ifp)) { |
3718 | if (!dst_present) | |
3719 | return 0; | |
3720 | ||
3721 | if (vni_mcast_grp) | |
e41db240 | 3722 | return zebra_vxlan_if_vni_mcast_group_add_update( |
131a9a2e | 3723 | ifp, vni, &vtep_ip); |
784d88aa | 3724 | |
131a9a2e SR |
3725 | return zebra_vxlan_dp_network_mac_add( |
3726 | ifp, br_if, &mac, vid, vni, nhg_id, sticky, | |
3727 | !!(ndm->ndm_flags & NTF_EXT_LEARNED)); | |
784d88aa | 3728 | } |
d62a17ae | 3729 | |
3730 | return zebra_vxlan_local_mac_add_update(ifp, br_if, &mac, vid, | |
f188e68e | 3731 | sticky, local_inactive, dp_static); |
d62a17ae | 3732 | } |
3733 | ||
3734 | /* This is a delete notification. | |
4b3f26f4 | 3735 | * Ignore the notification with IP dest as it may just signify that the |
3736 | * MAC has moved from remote to local. The exception is the special | |
3737 | * all-zeros MAC that represents the BUM flooding entry; we may have | |
3738 | * to readd it. Otherwise, | |
d62a17ae | 3739 | * 1. For a MAC over VxLan, check if it needs to be refreshed(readded) |
3740 | * 2. For a MAC over "local" interface, delete the mac | |
3741 | * Note: We will get notifications from both bridge driver and VxLAN | |
3742 | * driver. | |
d62a17ae | 3743 | */ |
f188e68e AK |
3744 | if (nhg_id) |
3745 | return 0; | |
3746 | ||
28bd0652 | 3747 | if (dst_present) { |
784d88aa | 3748 | if (vni_mcast_grp) |
e41db240 | 3749 | return zebra_vxlan_if_vni_mcast_group_del(ifp, vni, |
3750 | &vtep_ip); | |
784d88aa | 3751 | |
bc3421f0 | 3752 | if (is_zero_mac(&mac) && vni) |
131a9a2e | 3753 | return zebra_vxlan_check_readd_vtep(ifp, vni, vtep_ip); |
4b3f26f4 | 3754 | |
d62a17ae | 3755 | return 0; |
28bd0652 | 3756 | } |
d62a17ae | 3757 | |
3758 | if (IS_ZEBRA_IF_VXLAN(ifp)) | |
784d88aa | 3759 | return 0; |
d62a17ae | 3760 | |
3761 | return zebra_vxlan_local_mac_del(ifp, br_if, &mac, vid); | |
2232a77c | 3762 | } |
3763 | ||
2414abd3 | 3764 | static int netlink_macfdb_table(struct nlmsghdr *h, ns_id_t ns_id, int startup) |
2232a77c | 3765 | { |
d62a17ae | 3766 | int len; |
3767 | struct ndmsg *ndm; | |
2232a77c | 3768 | |
d62a17ae | 3769 | if (h->nlmsg_type != RTM_NEWNEIGH) |
3770 | return 0; | |
2232a77c | 3771 | |
d62a17ae | 3772 | /* Length validity. */ |
3773 | len = h->nlmsg_len - NLMSG_LENGTH(sizeof(struct ndmsg)); | |
3774 | if (len < 0) | |
3775 | return -1; | |
2232a77c | 3776 | |
d62a17ae | 3777 | /* We are interested only in AF_BRIDGE notifications. */ |
3778 | ndm = NLMSG_DATA(h); | |
3779 | if (ndm->ndm_family != AF_BRIDGE) | |
3780 | return 0; | |
2232a77c | 3781 | |
2414abd3 | 3782 | return netlink_macfdb_change(h, len, ns_id); |
2232a77c | 3783 | } |
3784 | ||
3785 | /* Request for MAC FDB information from the kernel */ | |
85a75f1e MS |
3786 | static int netlink_request_macs(struct nlsock *netlink_cmd, int family, |
3787 | int type, ifindex_t master_ifindex) | |
2232a77c | 3788 | { |
d62a17ae | 3789 | struct { |
3790 | struct nlmsghdr n; | |
3791 | struct ifinfomsg ifm; | |
3792 | char buf[256]; | |
3793 | } req; | |
3794 | ||
3795 | /* Form the request, specifying filter (rtattr) if needed. */ | |
3796 | memset(&req, 0, sizeof(req)); | |
3797 | req.n.nlmsg_type = type; | |
718f9b0f | 3798 | req.n.nlmsg_flags = NLM_F_ROOT | NLM_F_MATCH | NLM_F_REQUEST; |
d62a17ae | 3799 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg)); |
3800 | req.ifm.ifi_family = family; | |
3801 | if (master_ifindex) | |
312a6bee | 3802 | nl_attr_put32(&req.n, sizeof(req), IFLA_MASTER, master_ifindex); |
d62a17ae | 3803 | |
fd3f8e52 | 3804 | return netlink_request(netlink_cmd, &req); |
2232a77c | 3805 | } |
3806 | ||
3807 | /* | |
3808 | * MAC forwarding database read using netlink interface. This is invoked | |
3809 | * at startup. | |
3810 | */ | |
d62a17ae | 3811 | int netlink_macfdb_read(struct zebra_ns *zns) |
2232a77c | 3812 | { |
d62a17ae | 3813 | int ret; |
85a75f1e MS |
3814 | struct zebra_dplane_info dp_info; |
3815 | ||
3816 | zebra_dplane_info_from_zns(&dp_info, zns, true /*is_cmd*/); | |
d62a17ae | 3817 | |
3818 | /* Get bridge FDB table. */ | |
85a75f1e MS |
3819 | ret = netlink_request_macs(&zns->netlink_cmd, AF_BRIDGE, RTM_GETNEIGH, |
3820 | 0); | |
d62a17ae | 3821 | if (ret < 0) |
3822 | return ret; | |
3823 | /* We are reading entire table. */ | |
3824 | filter_vlan = 0; | |
85a75f1e | 3825 | ret = netlink_parse_info(netlink_macfdb_table, &zns->netlink_cmd, |
9bfadae8 | 3826 | &dp_info, 0, true); |
d62a17ae | 3827 | |
3828 | return ret; | |
2232a77c | 3829 | } |
3830 | ||
3831 | /* | |
3832 | * MAC forwarding database read using netlink interface. This is for a | |
3833 | * specific bridge and matching specific access VLAN (if VLAN-aware bridge). | |
3834 | */ | |
d62a17ae | 3835 | int netlink_macfdb_read_for_bridge(struct zebra_ns *zns, struct interface *ifp, |
784d88aa | 3836 | struct interface *br_if, vlanid_t vid) |
2232a77c | 3837 | { |
d62a17ae | 3838 | struct zebra_if *br_zif; |
85a75f1e | 3839 | struct zebra_dplane_info dp_info; |
d62a17ae | 3840 | int ret = 0; |
3841 | ||
85a75f1e | 3842 | zebra_dplane_info_from_zns(&dp_info, zns, true /*is_cmd*/); |
d62a17ae | 3843 | |
3844 | /* Save VLAN we're filtering on, if needed. */ | |
3845 | br_zif = (struct zebra_if *)br_if->info; | |
d62a17ae | 3846 | if (IS_ZEBRA_IF_BRIDGE_VLAN_AWARE(br_zif)) |
784d88aa | 3847 | filter_vlan = vid; |
d62a17ae | 3848 | |
3849 | /* Get bridge FDB table for specific bridge - we do the VLAN filtering. | |
3850 | */ | |
85a75f1e | 3851 | ret = netlink_request_macs(&zns->netlink_cmd, AF_BRIDGE, RTM_GETNEIGH, |
d62a17ae | 3852 | br_if->ifindex); |
3853 | if (ret < 0) | |
3854 | return ret; | |
85a75f1e | 3855 | ret = netlink_parse_info(netlink_macfdb_table, &zns->netlink_cmd, |
9bfadae8 | 3856 | &dp_info, 0, false); |
d62a17ae | 3857 | |
3858 | /* Reset VLAN filter. */ | |
3859 | filter_vlan = 0; | |
3860 | return ret; | |
2232a77c | 3861 | } |
3862 | ||
67fb9374 CS |
3863 | |
3864 | /* Request for MAC FDB for a specific MAC address in VLAN from the kernel */ | |
9464e5b8 SR |
3865 | static int netlink_request_specific_mac(struct zebra_ns *zns, int family, |
3866 | int type, struct interface *ifp, | |
3867 | const struct ethaddr *mac, vlanid_t vid, | |
3868 | vni_t vni, uint8_t flags) | |
67fb9374 CS |
3869 | { |
3870 | struct { | |
3871 | struct nlmsghdr n; | |
3872 | struct ndmsg ndm; | |
3873 | char buf[256]; | |
3874 | } req; | |
9464e5b8 | 3875 | struct zebra_if *zif; |
67fb9374 CS |
3876 | |
3877 | memset(&req, 0, sizeof(req)); | |
3878 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)); | |
3879 | req.n.nlmsg_type = type; /* RTM_GETNEIGH */ | |
3880 | req.n.nlmsg_flags = NLM_F_REQUEST; | |
3881 | req.ndm.ndm_family = family; /* AF_BRIDGE */ | |
9464e5b8 | 3882 | req.ndm.ndm_flags = flags; |
67fb9374 CS |
3883 | /* req.ndm.ndm_state = NUD_REACHABLE; */ |
3884 | ||
312a6bee | 3885 | nl_attr_put(&req.n, sizeof(req), NDA_LLADDR, mac, 6); |
67fb9374 | 3886 | |
9464e5b8 SR |
3887 | zif = (struct zebra_if *)ifp->info; |
3888 | /* Is this a read on a VXLAN interface? */ | |
3889 | if (IS_ZEBRA_IF_VXLAN(ifp)) { | |
3890 | nl_attr_put32(&req.n, sizeof(req), NDA_VNI, vni); | |
3891 | /* TBD: Why is ifindex not filled in the non-vxlan case? */ | |
3892 | req.ndm.ndm_ifindex = ifp->ifindex; | |
3893 | } else { | |
3894 | if (IS_ZEBRA_IF_BRIDGE_VLAN_AWARE(zif) && vid > 0) | |
3895 | nl_attr_put16(&req.n, sizeof(req), NDA_VLAN, vid); | |
3896 | nl_attr_put32(&req.n, sizeof(req), NDA_MASTER, ifp->ifindex); | |
3897 | } | |
67fb9374 CS |
3898 | |
3899 | if (IS_ZEBRA_DEBUG_KERNEL) | |
9464e5b8 SR |
3900 | zlog_debug("Tx %s %s IF %s(%u) MAC %pEA vid %u vni %u", |
3901 | nl_msg_type_to_str(type), | |
3902 | nl_family_to_str(req.ndm.ndm_family), ifp->name, | |
3903 | ifp->ifindex, mac, vid, vni); | |
67fb9374 | 3904 | |
fd3f8e52 | 3905 | return netlink_request(&zns->netlink_cmd, &req); |
67fb9374 CS |
3906 | } |
3907 | ||
3908 | int netlink_macfdb_read_specific_mac(struct zebra_ns *zns, | |
3909 | struct interface *br_if, | |
1a3bd37f | 3910 | const struct ethaddr *mac, vlanid_t vid) |
67fb9374 CS |
3911 | { |
3912 | int ret = 0; | |
3913 | struct zebra_dplane_info dp_info; | |
3914 | ||
3915 | zebra_dplane_info_from_zns(&dp_info, zns, true /*is_cmd*/); | |
3916 | ||
3917 | /* Get bridge FDB table for specific bridge - we do the VLAN filtering. | |
3918 | */ | |
9464e5b8 SR |
3919 | ret = netlink_request_specific_mac(zns, AF_BRIDGE, RTM_GETNEIGH, br_if, |
3920 | mac, vid, 0, 0); | |
3921 | if (ret < 0) | |
3922 | return ret; | |
3923 | ||
3924 | ret = netlink_parse_info(netlink_macfdb_table, &zns->netlink_cmd, | |
3925 | &dp_info, 1, 0); | |
3926 | ||
3927 | return ret; | |
3928 | } | |
3929 | ||
3930 | int netlink_macfdb_read_mcast_for_vni(struct zebra_ns *zns, | |
3931 | struct interface *ifp, vni_t vni) | |
3932 | { | |
3933 | struct zebra_if *zif; | |
0bbad9d1 | 3934 | struct ethaddr mac = {.octet = {0}}; |
9464e5b8 SR |
3935 | struct zebra_dplane_info dp_info; |
3936 | int ret = 0; | |
3937 | ||
3938 | zif = ifp->info; | |
3939 | if (IS_ZEBRA_VXLAN_IF_VNI(zif)) | |
3940 | return 0; | |
3941 | ||
3942 | zebra_dplane_info_from_zns(&dp_info, zns, true /*is_cmd*/); | |
3943 | ||
3944 | /* Get specific FDB entry for BUM handling, if any */ | |
3945 | ret = netlink_request_specific_mac(zns, AF_BRIDGE, RTM_GETNEIGH, ifp, | |
3946 | &mac, 0, vni, NTF_SELF); | |
67fb9374 CS |
3947 | if (ret < 0) |
3948 | return ret; | |
3949 | ||
3950 | ret = netlink_parse_info(netlink_macfdb_table, &zns->netlink_cmd, | |
9bfadae8 | 3951 | &dp_info, 1, false); |
67fb9374 CS |
3952 | |
3953 | return ret; | |
3954 | } | |
036d93c0 MS |
3955 | |
3956 | /* | |
3957 | * Netlink-specific handler for MAC updates using dataplane context object. | |
3958 | */ | |
67e3369e JU |
3959 | ssize_t netlink_macfdb_update_ctx(struct zebra_dplane_ctx *ctx, void *data, |
3960 | size_t datalen) | |
2232a77c | 3961 | { |
340845e2 | 3962 | struct ipaddr vtep_ip; |
036d93c0 | 3963 | vlanid_t vid; |
d4d4ec1c RZ |
3964 | ssize_t total; |
3965 | int cmd; | |
340845e2 JU |
3966 | uint8_t flags; |
3967 | uint16_t state; | |
506efd37 | 3968 | uint32_t nhg_id; |
f188e68e AK |
3969 | uint32_t update_flags; |
3970 | bool nfy = false; | |
3971 | uint8_t nfy_flags = 0; | |
88217099 PG |
3972 | int proto = RTPROT_ZEBRA; |
3973 | ||
3974 | if (dplane_ctx_get_type(ctx) != 0) | |
3975 | proto = zebra2proto(dplane_ctx_get_type(ctx)); | |
d4d4ec1c RZ |
3976 | |
3977 | cmd = dplane_ctx_get_op(ctx) == DPLANE_OP_MAC_INSTALL | |
3978 | ? RTM_NEWNEIGH : RTM_DELNEIGH; | |
036d93c0 | 3979 | |
f188e68e | 3980 | flags = NTF_MASTER; |
340845e2 | 3981 | state = NUD_REACHABLE; |
d62a17ae | 3982 | |
f188e68e AK |
3983 | update_flags = dplane_ctx_mac_get_update_flags(ctx); |
3984 | if (update_flags & DPLANE_MAC_REMOTE) { | |
3985 | flags |= NTF_SELF; | |
60e372e9 AK |
3986 | if (dplane_ctx_mac_is_sticky(ctx)) { |
3987 | /* NUD_NOARP prevents the entry from expiring */ | |
3988 | state |= NUD_NOARP; | |
3989 | /* sticky the entry from moving */ | |
f188e68e | 3990 | flags |= NTF_STICKY; |
60e372e9 | 3991 | } else { |
f188e68e | 3992 | flags |= NTF_EXT_LEARNED; |
60e372e9 | 3993 | } |
f188e68e AK |
3994 | /* if it was static-local previously we need to clear the |
3995 | * notify flags on replace with remote | |
3996 | */ | |
3997 | if (update_flags & DPLANE_MAC_WAS_STATIC) | |
3998 | nfy = true; | |
3999 | } else { | |
4000 | /* local mac */ | |
4001 | if (update_flags & DPLANE_MAC_SET_STATIC) { | |
4bcdb608 | 4002 | nfy_flags |= FDB_NOTIFY_BIT; |
f188e68e AK |
4003 | state |= NUD_NOARP; |
4004 | } | |
4005 | ||
4006 | if (update_flags & DPLANE_MAC_SET_INACTIVE) | |
4bcdb608 | 4007 | nfy_flags |= FDB_NOTIFY_INACTIVE_BIT; |
f188e68e AK |
4008 | |
4009 | nfy = true; | |
4010 | } | |
478566d6 | 4011 | |
506efd37 | 4012 | nhg_id = dplane_ctx_mac_get_nhg_id(ctx); |
340845e2 JU |
4013 | vtep_ip.ipaddr_v4 = *(dplane_ctx_mac_get_vtep_ip(ctx)); |
4014 | SET_IPADDR_V4(&vtep_ip); | |
d62a17ae | 4015 | |
036d93c0 | 4016 | if (IS_ZEBRA_DEBUG_KERNEL) { |
478566d6 | 4017 | char vid_buf[20]; |
506efd37 | 4018 | const struct ethaddr *mac = dplane_ctx_mac_get_addr(ctx); |
478566d6 | 4019 | |
340845e2 JU |
4020 | vid = dplane_ctx_mac_get_vlan(ctx); |
4021 | if (vid > 0) | |
478566d6 MS |
4022 | snprintf(vid_buf, sizeof(vid_buf), " VLAN %u", vid); |
4023 | else | |
4024 | vid_buf[0] = '\0'; | |
036d93c0 | 4025 | |
ccd187cd | 4026 | zlog_debug( |
ef7b8be4 | 4027 | "Tx %s family %s IF %s(%u)%s %sMAC %pEA dst %pIA nhg %u%s%s%s%s%s", |
ccd187cd AK |
4028 | nl_msg_type_to_str(cmd), nl_family_to_str(AF_BRIDGE), |
4029 | dplane_ctx_get_ifname(ctx), dplane_ctx_get_ifindex(ctx), | |
4030 | vid_buf, dplane_ctx_mac_is_sticky(ctx) ? "sticky " : "", | |
ef7b8be4 | 4031 | mac, &vtep_ip, nhg_id, |
ccd187cd AK |
4032 | (update_flags & DPLANE_MAC_REMOTE) ? " rem" : "", |
4033 | (update_flags & DPLANE_MAC_WAS_STATIC) ? " clr_sync" | |
4034 | : "", | |
4035 | (update_flags & DPLANE_MAC_SET_STATIC) ? " static" : "", | |
4036 | (update_flags & DPLANE_MAC_SET_INACTIVE) ? " inactive" | |
4037 | : "", | |
4038 | nfy ? " nfy" : ""); | |
036d93c0 | 4039 | } |
d62a17ae | 4040 | |
0be6e7d7 | 4041 | total = netlink_neigh_update_msg_encode( |
0a27a2fe PG |
4042 | ctx, cmd, (const void *)dplane_ctx_mac_get_addr(ctx), ETH_ALEN, |
4043 | &vtep_ip, true, AF_BRIDGE, 0, flags, state, nhg_id, nfy, | |
4044 | nfy_flags, false /*ext*/, 0 /*ext_flags*/, data, datalen, | |
88217099 | 4045 | proto); |
d4d4ec1c RZ |
4046 | |
4047 | return total; | |
2232a77c | 4048 | } |
4049 | ||
f17b99ed DS |
4050 | /* |
4051 | * In the event the kernel deletes ipv4 link-local neighbor entries created for | |
4052 | * 5549 support, re-install them. | |
4053 | */ | |
4054 | static void netlink_handle_5549(struct ndmsg *ndm, struct zebra_if *zif, | |
9b036974 DS |
4055 | struct interface *ifp, struct ipaddr *ip, |
4056 | bool handle_failed) | |
f17b99ed DS |
4057 | { |
4058 | if (ndm->ndm_family != AF_INET) | |
4059 | return; | |
4060 | ||
4061 | if (!zif->v6_2_v4_ll_neigh_entry) | |
4062 | return; | |
4063 | ||
4064 | if (ipv4_ll.s_addr != ip->ip._v4_addr.s_addr) | |
4065 | return; | |
4066 | ||
9b036974 DS |
4067 | if (handle_failed && ndm->ndm_state & NUD_FAILED) { |
4068 | zlog_info("Neighbor Entry for %s has entered a failed state, not reinstalling", | |
4069 | ifp->name); | |
4070 | return; | |
4071 | } | |
4072 | ||
f17b99ed DS |
4073 | if_nbr_ipv6ll_to_ipv4ll_neigh_update(ifp, &zif->v6_2_v4_ll_addr6, true); |
4074 | } | |
4075 | ||
d62a17ae | 4076 | #define NUD_VALID \ |
4077 | (NUD_PERMANENT | NUD_NOARP | NUD_REACHABLE | NUD_PROBE | NUD_STALE \ | |
4078 | | NUD_DELAY) | |
f188e68e AK |
4079 | #define NUD_LOCAL_ACTIVE \ |
4080 | (NUD_PERMANENT | NUD_NOARP | NUD_REACHABLE) | |
2232a77c | 4081 | |
80f6b5fa PG |
4082 | static int netlink_nbr_entry_state_to_zclient(int nbr_state) |
4083 | { | |
4084 | /* an exact match is done between | |
4085 | * - netlink neighbor state values: NDM_XXX (see in linux/neighbour.h) | |
4086 | * - zclient neighbor state values: ZEBRA_NEIGH_STATE_XXX | |
4087 | * (see in lib/zclient.h) | |
4088 | */ | |
4089 | return nbr_state; | |
4090 | } | |
2414abd3 | 4091 | static int netlink_ipneigh_change(struct nlmsghdr *h, int len, ns_id_t ns_id) |
2232a77c | 4092 | { |
d62a17ae | 4093 | struct ndmsg *ndm; |
4094 | struct interface *ifp; | |
4095 | struct zebra_if *zif; | |
d62a17ae | 4096 | struct rtattr *tb[NDA_MAX + 1]; |
4097 | struct interface *link_if; | |
4098 | struct ethaddr mac; | |
4099 | struct ipaddr ip; | |
4100 | char buf[ETHER_ADDR_STRLEN]; | |
d62a17ae | 4101 | int mac_present = 0; |
a37f4598 | 4102 | bool is_ext; |
4103 | bool is_router; | |
f188e68e | 4104 | bool local_inactive; |
7c0e4dc6 AK |
4105 | uint32_t ext_flags = 0; |
4106 | bool dp_static = false; | |
7723e8d3 PG |
4107 | int l2_len = 0; |
4108 | int cmd; | |
d62a17ae | 4109 | |
4110 | ndm = NLMSG_DATA(h); | |
4111 | ||
4112 | /* The interface should exist. */ | |
5895d33f | 4113 | ifp = if_lookup_by_index_per_ns(zebra_ns_lookup(ns_id), |
d62a17ae | 4114 | ndm->ndm_ifindex); |
2853fed6 | 4115 | if (!ifp || !ifp->info) |
d62a17ae | 4116 | return 0; |
4117 | ||
20089ae2 DS |
4118 | zif = (struct zebra_if *)ifp->info; |
4119 | ||
4120 | /* Parse attributes and extract fields of interest. */ | |
20089ae2 DS |
4121 | netlink_parse_rtattr(tb, NDA_MAX, NDA_RTA(ndm), len); |
4122 | ||
4123 | if (!tb[NDA_DST]) { | |
bd47f3a3 | 4124 | zlog_debug("%s family %s IF %s(%u) vrf %s(%u) - no DST", |
9df414fe QY |
4125 | nl_msg_type_to_str(h->nlmsg_type), |
4126 | nl_family_to_str(ndm->ndm_family), ifp->name, | |
096f7609 | 4127 | ndm->ndm_ifindex, ifp->vrf->name, ifp->vrf->vrf_id); |
d62a17ae | 4128 | return 0; |
20089ae2 DS |
4129 | } |
4130 | ||
6006b807 | 4131 | memset(&ip, 0, sizeof(ip)); |
20089ae2 DS |
4132 | ip.ipa_type = (ndm->ndm_family == AF_INET) ? IPADDR_V4 : IPADDR_V6; |
4133 | memcpy(&ip.ip.addr, RTA_DATA(tb[NDA_DST]), RTA_PAYLOAD(tb[NDA_DST])); | |
4134 | ||
f17b99ed DS |
4135 | /* if kernel deletes our rfc5549 neighbor entry, re-install it */ |
4136 | if (h->nlmsg_type == RTM_DELNEIGH && (ndm->ndm_state & NUD_PERMANENT)) { | |
9b036974 | 4137 | netlink_handle_5549(ndm, zif, ifp, &ip, false); |
28bd0652 DS |
4138 | if (IS_ZEBRA_DEBUG_KERNEL) |
4139 | zlog_debug( | |
1d5453d6 | 4140 | " Neighbor Entry Received is a 5549 entry, finished"); |
20089ae2 DS |
4141 | return 0; |
4142 | } | |
d62a17ae | 4143 | |
f17b99ed | 4144 | /* if kernel marks our rfc5549 neighbor entry invalid, re-install it */ |
9b036974 DS |
4145 | if (h->nlmsg_type == RTM_NEWNEIGH && !(ndm->ndm_state & NUD_VALID)) |
4146 | netlink_handle_5549(ndm, zif, ifp, &ip, true); | |
f17b99ed | 4147 | |
7723e8d3 PG |
4148 | /* we send link layer information to client: |
4149 | * - nlmsg_type = RTM_DELNEIGH|NEWNEIGH|GETNEIGH | |
4150 | * - struct ipaddr ( for DEL and GET) | |
4151 | * - struct ethaddr mac; (for NEW) | |
4152 | */ | |
4153 | if (h->nlmsg_type == RTM_NEWNEIGH) | |
4154 | cmd = ZEBRA_NHRP_NEIGH_ADDED; | |
4155 | else if (h->nlmsg_type == RTM_GETNEIGH) | |
4156 | cmd = ZEBRA_NHRP_NEIGH_GET; | |
4157 | else if (h->nlmsg_type == RTM_DELNEIGH) | |
4158 | cmd = ZEBRA_NHRP_NEIGH_REMOVED; | |
4159 | else { | |
4160 | zlog_debug("%s(): unknown nlmsg type %u", __func__, | |
4161 | h->nlmsg_type); | |
4162 | return 0; | |
4163 | } | |
4164 | if (tb[NDA_LLADDR]) { | |
4165 | /* copy LLADDR information */ | |
4166 | l2_len = RTA_PAYLOAD(tb[NDA_LLADDR]); | |
7723e8d3 | 4167 | } |
d603c077 PG |
4168 | if (l2_len == IPV4_MAX_BYTELEN || l2_len == 0) { |
4169 | union sockunion link_layer_ipv4; | |
4170 | ||
4171 | if (l2_len) { | |
4172 | sockunion_family(&link_layer_ipv4) = AF_INET; | |
4173 | memcpy((void *)sockunion_get_addr(&link_layer_ipv4), | |
b7c21fad | 4174 | RTA_DATA(tb[NDA_LLADDR]), l2_len); |
d603c077 PG |
4175 | } else |
4176 | sockunion_family(&link_layer_ipv4) = AF_UNSPEC; | |
80f6b5fa PG |
4177 | zsend_nhrp_neighbor_notify( |
4178 | cmd, ifp, &ip, | |
4179 | netlink_nbr_entry_state_to_zclient(ndm->ndm_state), | |
4180 | &link_layer_ipv4); | |
d603c077 | 4181 | } |
7723e8d3 PG |
4182 | |
4183 | if (h->nlmsg_type == RTM_GETNEIGH) | |
4184 | return 0; | |
4185 | ||
d62a17ae | 4186 | /* The neighbor is present on an SVI. From this, we locate the |
4187 | * underlying | |
4188 | * bridge because we're only interested in neighbors on a VxLAN bridge. | |
4189 | * The bridge is located based on the nature of the SVI: | |
4190 | * (a) In the case of a VLAN-aware bridge, the SVI is a L3 VLAN | |
4191 | * interface | |
4192 | * and is linked to the bridge | |
4193 | * (b) In the case of a VLAN-unaware bridge, the SVI is the bridge | |
3819e4ce | 4194 | * interface |
d62a17ae | 4195 | * itself |
4196 | */ | |
4197 | if (IS_ZEBRA_IF_VLAN(ifp)) { | |
5895d33f | 4198 | link_if = if_lookup_by_index_per_ns(zebra_ns_lookup(ns_id), |
71349e03 | 4199 | zif->link_ifindex); |
d62a17ae | 4200 | if (!link_if) |
4201 | return 0; | |
4202 | } else if (IS_ZEBRA_IF_BRIDGE(ifp)) | |
4203 | link_if = ifp; | |
28bd0652 | 4204 | else { |
4cf4fad1 | 4205 | link_if = NULL; |
28bd0652 DS |
4206 | if (IS_ZEBRA_DEBUG_KERNEL) |
4207 | zlog_debug( | |
1d5453d6 | 4208 | " Neighbor Entry received is not on a VLAN or a BRIDGE, ignoring"); |
28bd0652 | 4209 | } |
d62a17ae | 4210 | |
6006b807 | 4211 | memset(&mac, 0, sizeof(mac)); |
d62a17ae | 4212 | if (h->nlmsg_type == RTM_NEWNEIGH) { |
4213 | if (tb[NDA_LLADDR]) { | |
ff8b7eb8 | 4214 | if (RTA_PAYLOAD(tb[NDA_LLADDR]) != ETH_ALEN) { |
28bd0652 DS |
4215 | if (IS_ZEBRA_DEBUG_KERNEL) |
4216 | zlog_debug( | |
bd47f3a3 | 4217 | "%s family %s IF %s(%u) vrf %s(%u) - LLADDR is not MAC, len %lu", |
28bd0652 DS |
4218 | nl_msg_type_to_str( |
4219 | h->nlmsg_type), | |
4220 | nl_family_to_str( | |
4221 | ndm->ndm_family), | |
4222 | ifp->name, ndm->ndm_ifindex, | |
096f7609 IR |
4223 | ifp->vrf->name, |
4224 | ifp->vrf->vrf_id, | |
28bd0652 DS |
4225 | (unsigned long)RTA_PAYLOAD( |
4226 | tb[NDA_LLADDR])); | |
d62a17ae | 4227 | return 0; |
4228 | } | |
4229 | ||
4230 | mac_present = 1; | |
ff8b7eb8 | 4231 | memcpy(&mac, RTA_DATA(tb[NDA_LLADDR]), ETH_ALEN); |
d62a17ae | 4232 | } |
4233 | ||
a37f4598 | 4234 | is_ext = !!(ndm->ndm_flags & NTF_EXT_LEARNED); |
4235 | is_router = !!(ndm->ndm_flags & NTF_ROUTER); | |
d62a17ae | 4236 | |
7c0e4dc6 AK |
4237 | if (tb[NDA_EXT_FLAGS]) { |
4238 | ext_flags = *(uint32_t *)RTA_DATA(tb[NDA_EXT_FLAGS]); | |
4239 | if (ext_flags & NTF_E_MH_PEER_SYNC) | |
4240 | dp_static = true; | |
4241 | } | |
4242 | ||
d62a17ae | 4243 | if (IS_ZEBRA_DEBUG_KERNEL) |
4244 | zlog_debug( | |
ef7b8be4 | 4245 | "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 | 4246 | nl_msg_type_to_str(h->nlmsg_type), |
4247 | nl_family_to_str(ndm->ndm_family), ifp->name, | |
096f7609 IR |
4248 | ndm->ndm_ifindex, ifp->vrf->name, |
4249 | ifp->vrf->vrf_id, &ip, | |
d62a17ae | 4250 | mac_present |
4251 | ? prefix_mac2str(&mac, buf, sizeof(buf)) | |
4252 | : "", | |
7c0e4dc6 | 4253 | ndm->ndm_state, ndm->ndm_flags, ext_flags); |
d62a17ae | 4254 | |
4255 | /* If the neighbor state is valid for use, process as an add or | |
4256 | * update | |
4257 | * else process as a delete. Note that the delete handling may | |
4258 | * result | |
4259 | * in re-adding the neighbor if it is a valid "remote" neighbor. | |
4260 | */ | |
f188e68e | 4261 | if (ndm->ndm_state & NUD_VALID) { |
c7bfd085 AK |
4262 | if (zebra_evpn_mh_do_adv_reachable_neigh_only()) |
4263 | local_inactive = | |
4264 | !(ndm->ndm_state & NUD_LOCAL_ACTIVE); | |
4265 | else | |
4266 | /* If EVPN-MH is not enabled we treat STALE | |
4267 | * neighbors as locally-active and advertise | |
4268 | * them | |
4269 | */ | |
4270 | local_inactive = false; | |
f188e68e | 4271 | |
4cf4fad1 AK |
4272 | /* Add local neighbors to the l3 interface database */ |
4273 | if (is_ext) | |
4274 | zebra_neigh_del(ifp, &ip); | |
4275 | else | |
4276 | zebra_neigh_add(ifp, &ip, &mac); | |
4277 | ||
4278 | if (link_if) | |
4279 | zebra_vxlan_handle_kernel_neigh_update( | |
4280 | ifp, link_if, &ip, &mac, ndm->ndm_state, | |
4281 | is_ext, is_router, local_inactive, | |
4282 | dp_static); | |
4283 | return 0; | |
f188e68e | 4284 | } |
d62a17ae | 4285 | |
4cf4fad1 AK |
4286 | |
4287 | zebra_neigh_del(ifp, &ip); | |
4288 | if (link_if) | |
4289 | zebra_vxlan_handle_kernel_neigh_del(ifp, link_if, &ip); | |
4290 | return 0; | |
d62a17ae | 4291 | } |
4292 | ||
4293 | if (IS_ZEBRA_DEBUG_KERNEL) | |
ef7b8be4 | 4294 | zlog_debug("Rx %s family %s IF %s(%u) vrf %s(%u) IP %pIA", |
d62a17ae | 4295 | nl_msg_type_to_str(h->nlmsg_type), |
4296 | nl_family_to_str(ndm->ndm_family), ifp->name, | |
096f7609 | 4297 | ndm->ndm_ifindex, ifp->vrf->name, ifp->vrf->vrf_id, |
ef7b8be4 | 4298 | &ip); |
d62a17ae | 4299 | |
4300 | /* Process the delete - it may result in re-adding the neighbor if it is | |
4301 | * a valid "remote" neighbor. | |
4302 | */ | |
4cf4fad1 AK |
4303 | zebra_neigh_del(ifp, &ip); |
4304 | if (link_if) | |
4305 | zebra_vxlan_handle_kernel_neigh_del(ifp, link_if, &ip); | |
4306 | ||
4307 | return 0; | |
2232a77c | 4308 | } |
4309 | ||
2414abd3 | 4310 | static int netlink_neigh_table(struct nlmsghdr *h, ns_id_t ns_id, int startup) |
2232a77c | 4311 | { |
d62a17ae | 4312 | int len; |
4313 | struct ndmsg *ndm; | |
2232a77c | 4314 | |
d62a17ae | 4315 | if (h->nlmsg_type != RTM_NEWNEIGH) |
4316 | return 0; | |
2232a77c | 4317 | |
d62a17ae | 4318 | /* Length validity. */ |
4319 | len = h->nlmsg_len - NLMSG_LENGTH(sizeof(struct ndmsg)); | |
4320 | if (len < 0) | |
4321 | return -1; | |
2232a77c | 4322 | |
d62a17ae | 4323 | /* We are interested only in AF_INET or AF_INET6 notifications. */ |
4324 | ndm = NLMSG_DATA(h); | |
4325 | if (ndm->ndm_family != AF_INET && ndm->ndm_family != AF_INET6) | |
4326 | return 0; | |
2232a77c | 4327 | |
2414abd3 | 4328 | return netlink_neigh_change(h, len); |
2232a77c | 4329 | } |
4330 | ||
4331 | /* Request for IP neighbor information from the kernel */ | |
85a75f1e MS |
4332 | static int netlink_request_neigh(struct nlsock *netlink_cmd, int family, |
4333 | int type, ifindex_t ifindex) | |
2232a77c | 4334 | { |
d62a17ae | 4335 | struct { |
4336 | struct nlmsghdr n; | |
4337 | struct ndmsg ndm; | |
4338 | char buf[256]; | |
4339 | } req; | |
4340 | ||
4341 | /* Form the request, specifying filter (rtattr) if needed. */ | |
4342 | memset(&req, 0, sizeof(req)); | |
4343 | req.n.nlmsg_type = type; | |
718f9b0f | 4344 | req.n.nlmsg_flags = NLM_F_ROOT | NLM_F_MATCH | NLM_F_REQUEST; |
d62a17ae | 4345 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)); |
4346 | req.ndm.ndm_family = family; | |
4347 | if (ifindex) | |
312a6bee | 4348 | nl_attr_put32(&req.n, sizeof(req), NDA_IFINDEX, ifindex); |
d62a17ae | 4349 | |
fd3f8e52 | 4350 | return netlink_request(netlink_cmd, &req); |
2232a77c | 4351 | } |
4352 | ||
4353 | /* | |
4354 | * IP Neighbor table read using netlink interface. This is invoked | |
4355 | * at startup. | |
4356 | */ | |
d62a17ae | 4357 | int netlink_neigh_read(struct zebra_ns *zns) |
2232a77c | 4358 | { |
d62a17ae | 4359 | int ret; |
85a75f1e MS |
4360 | struct zebra_dplane_info dp_info; |
4361 | ||
4362 | zebra_dplane_info_from_zns(&dp_info, zns, true /*is_cmd*/); | |
2232a77c | 4363 | |
d62a17ae | 4364 | /* Get IP neighbor table. */ |
85a75f1e MS |
4365 | ret = netlink_request_neigh(&zns->netlink_cmd, AF_UNSPEC, RTM_GETNEIGH, |
4366 | 0); | |
d62a17ae | 4367 | if (ret < 0) |
4368 | return ret; | |
85a75f1e | 4369 | ret = netlink_parse_info(netlink_neigh_table, &zns->netlink_cmd, |
9bfadae8 | 4370 | &dp_info, 0, true); |
2232a77c | 4371 | |
d62a17ae | 4372 | return ret; |
2232a77c | 4373 | } |
4374 | ||
4375 | /* | |
4376 | * IP Neighbor table read using netlink interface. This is for a specific | |
4377 | * VLAN device. | |
4378 | */ | |
d62a17ae | 4379 | int netlink_neigh_read_for_vlan(struct zebra_ns *zns, struct interface *vlan_if) |
2232a77c | 4380 | { |
d62a17ae | 4381 | int ret = 0; |
85a75f1e MS |
4382 | struct zebra_dplane_info dp_info; |
4383 | ||
4384 | zebra_dplane_info_from_zns(&dp_info, zns, true /*is_cmd*/); | |
2232a77c | 4385 | |
85a75f1e | 4386 | ret = netlink_request_neigh(&zns->netlink_cmd, AF_UNSPEC, RTM_GETNEIGH, |
d62a17ae | 4387 | vlan_if->ifindex); |
4388 | if (ret < 0) | |
4389 | return ret; | |
85a75f1e | 4390 | ret = netlink_parse_info(netlink_neigh_table, &zns->netlink_cmd, |
9bfadae8 | 4391 | &dp_info, 0, false); |
2232a77c | 4392 | |
d62a17ae | 4393 | return ret; |
2232a77c | 4394 | } |
4395 | ||
67fb9374 CS |
4396 | /* |
4397 | * Request for a specific IP in VLAN (SVI) device from IP Neighbor table, | |
4398 | * read using netlink interface. | |
4399 | */ | |
4400 | static int netlink_request_specific_neigh_in_vlan(struct zebra_ns *zns, | |
1a3bd37f MS |
4401 | int type, |
4402 | const struct ipaddr *ip, | |
67fb9374 CS |
4403 | ifindex_t ifindex) |
4404 | { | |
4405 | struct { | |
4406 | struct nlmsghdr n; | |
4407 | struct ndmsg ndm; | |
4408 | char buf[256]; | |
4409 | } req; | |
4410 | int ipa_len; | |
4411 | ||
4412 | /* Form the request, specifying filter (rtattr) if needed. */ | |
4413 | memset(&req, 0, sizeof(req)); | |
4414 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)); | |
4415 | req.n.nlmsg_flags = NLM_F_REQUEST; | |
4416 | req.n.nlmsg_type = type; /* RTM_GETNEIGH */ | |
4417 | req.ndm.ndm_ifindex = ifindex; | |
4418 | ||
4419 | if (IS_IPADDR_V4(ip)) { | |
4420 | ipa_len = IPV4_MAX_BYTELEN; | |
4421 | req.ndm.ndm_family = AF_INET; | |
4422 | ||
4423 | } else { | |
4424 | ipa_len = IPV6_MAX_BYTELEN; | |
4425 | req.ndm.ndm_family = AF_INET6; | |
4426 | } | |
4427 | ||
312a6bee | 4428 | nl_attr_put(&req.n, sizeof(req), NDA_DST, &ip->ip.addr, ipa_len); |
67fb9374 | 4429 | |
ef7b8be4 DL |
4430 | if (IS_ZEBRA_DEBUG_KERNEL) |
4431 | zlog_debug("%s: Tx %s family %s IF %u IP %pIA flags 0x%x", | |
7c26c121 | 4432 | __func__, nl_msg_type_to_str(type), |
ef7b8be4 DL |
4433 | nl_family_to_str(req.ndm.ndm_family), ifindex, ip, |
4434 | req.n.nlmsg_flags); | |
7c26c121 | 4435 | |
fd3f8e52 | 4436 | return netlink_request(&zns->netlink_cmd, &req); |
67fb9374 CS |
4437 | } |
4438 | ||
1a3bd37f MS |
4439 | int netlink_neigh_read_specific_ip(const struct ipaddr *ip, |
4440 | struct interface *vlan_if) | |
67fb9374 CS |
4441 | { |
4442 | int ret = 0; | |
4443 | struct zebra_ns *zns; | |
096f7609 | 4444 | struct zebra_vrf *zvrf = vlan_if->vrf->info; |
67fb9374 CS |
4445 | struct zebra_dplane_info dp_info; |
4446 | ||
4447 | zns = zvrf->zns; | |
4448 | ||
4449 | zebra_dplane_info_from_zns(&dp_info, zns, true /*is_cmd*/); | |
4450 | ||
4451 | if (IS_ZEBRA_DEBUG_KERNEL) | |
ef7b8be4 DL |
4452 | zlog_debug("%s: neigh request IF %s(%u) IP %pIA vrf %s(%u)", |
4453 | __func__, vlan_if->name, vlan_if->ifindex, ip, | |
096f7609 | 4454 | vlan_if->vrf->name, vlan_if->vrf->vrf_id); |
67fb9374 CS |
4455 | |
4456 | ret = netlink_request_specific_neigh_in_vlan(zns, RTM_GETNEIGH, ip, | |
4457 | vlan_if->ifindex); | |
4458 | if (ret < 0) | |
4459 | return ret; | |
4460 | ||
4461 | ret = netlink_parse_info(netlink_neigh_table, &zns->netlink_cmd, | |
9bfadae8 | 4462 | &dp_info, 1, false); |
67fb9374 CS |
4463 | |
4464 | return ret; | |
4465 | } | |
4466 | ||
2414abd3 | 4467 | int netlink_neigh_change(struct nlmsghdr *h, ns_id_t ns_id) |
2232a77c | 4468 | { |
d62a17ae | 4469 | int len; |
4470 | struct ndmsg *ndm; | |
2232a77c | 4471 | |
7723e8d3 PG |
4472 | if (!(h->nlmsg_type == RTM_NEWNEIGH || h->nlmsg_type == RTM_DELNEIGH |
4473 | || h->nlmsg_type == RTM_GETNEIGH)) | |
d62a17ae | 4474 | return 0; |
2232a77c | 4475 | |
d62a17ae | 4476 | /* Length validity. */ |
4477 | len = h->nlmsg_len - NLMSG_LENGTH(sizeof(struct ndmsg)); | |
9bdf8618 | 4478 | if (len < 0) { |
15569c58 DA |
4479 | zlog_err( |
4480 | "%s: Message received from netlink is of a broken size %d %zu", | |
4481 | __func__, h->nlmsg_len, | |
4482 | (size_t)NLMSG_LENGTH(sizeof(struct ndmsg))); | |
d62a17ae | 4483 | return -1; |
9bdf8618 | 4484 | } |
2232a77c | 4485 | |
d62a17ae | 4486 | /* Is this a notification for the MAC FDB or IP neighbor table? */ |
4487 | ndm = NLMSG_DATA(h); | |
4488 | if (ndm->ndm_family == AF_BRIDGE) | |
2414abd3 | 4489 | return netlink_macfdb_change(h, len, ns_id); |
2232a77c | 4490 | |
d62a17ae | 4491 | if (ndm->ndm_type != RTN_UNICAST) |
4492 | return 0; | |
2232a77c | 4493 | |
d62a17ae | 4494 | if (ndm->ndm_family == AF_INET || ndm->ndm_family == AF_INET6) |
2414abd3 | 4495 | return netlink_ipneigh_change(h, len, ns_id); |
8a1b681c | 4496 | else { |
9df414fe | 4497 | flog_warn( |
e914ccbe | 4498 | EC_ZEBRA_UNKNOWN_FAMILY, |
87b5d1b0 DS |
4499 | "Invalid address family: %u received from kernel neighbor change: %s", |
4500 | ndm->ndm_family, nl_msg_type_to_str(h->nlmsg_type)); | |
8a1b681c SW |
4501 | return 0; |
4502 | } | |
2232a77c | 4503 | |
d62a17ae | 4504 | return 0; |
2232a77c | 4505 | } |
4506 | ||
931fa60c MS |
4507 | /* |
4508 | * Utility neighbor-update function, using info from dplane context. | |
4509 | */ | |
67e3369e JU |
4510 | static ssize_t netlink_neigh_update_ctx(const struct zebra_dplane_ctx *ctx, |
4511 | int cmd, void *buf, size_t buflen) | |
2232a77c | 4512 | { |
931fa60c | 4513 | const struct ipaddr *ip; |
0a27a2fe PG |
4514 | const struct ethaddr *mac = NULL; |
4515 | const struct ipaddr *link_ip = NULL; | |
4516 | const void *link_ptr = NULL; | |
4517 | char buf2[ETHER_ADDR_STRLEN]; | |
4518 | ||
4519 | int llalen; | |
931fa60c MS |
4520 | uint8_t flags; |
4521 | uint16_t state; | |
340845e2 | 4522 | uint8_t family; |
ccd187cd AK |
4523 | uint32_t update_flags; |
4524 | uint32_t ext_flags = 0; | |
4525 | bool ext = false; | |
88217099 PG |
4526 | int proto = RTPROT_ZEBRA; |
4527 | ||
4528 | if (dplane_ctx_get_type(ctx) != 0) | |
4529 | proto = zebra2proto(dplane_ctx_get_type(ctx)); | |
d62a17ae | 4530 | |
931fa60c | 4531 | ip = dplane_ctx_neigh_get_ipaddr(ctx); |
931fa60c | 4532 | |
0a27a2fe PG |
4533 | if (dplane_ctx_get_op(ctx) == DPLANE_OP_NEIGH_IP_INSTALL |
4534 | || dplane_ctx_get_op(ctx) == DPLANE_OP_NEIGH_IP_DELETE) { | |
4535 | link_ip = dplane_ctx_neigh_get_link_ip(ctx); | |
4536 | llalen = IPADDRSZ(link_ip); | |
4537 | link_ptr = (const void *)&(link_ip->ip.addr); | |
4538 | ipaddr2str(link_ip, buf2, sizeof(buf2)); | |
4539 | } else { | |
4540 | mac = dplane_ctx_neigh_get_mac(ctx); | |
4541 | llalen = ETH_ALEN; | |
4542 | link_ptr = (const void *)mac; | |
4543 | if (is_zero_mac(mac)) | |
4544 | mac = NULL; | |
4545 | if (mac) | |
4546 | prefix_mac2str(mac, buf2, sizeof(buf2)); | |
4547 | else | |
4548 | snprintf(buf2, sizeof(buf2), "null"); | |
4549 | } | |
ccd187cd | 4550 | update_flags = dplane_ctx_neigh_get_update_flags(ctx); |
931fa60c MS |
4551 | flags = neigh_flags_to_netlink(dplane_ctx_neigh_get_flags(ctx)); |
4552 | state = neigh_state_to_netlink(dplane_ctx_neigh_get_state(ctx)); | |
4553 | ||
340845e2 | 4554 | family = IS_IPADDR_V4(ip) ? AF_INET : AF_INET6; |
d62a17ae | 4555 | |
ccd187cd AK |
4556 | if (update_flags & DPLANE_NEIGH_REMOTE) { |
4557 | flags |= NTF_EXT_LEARNED; | |
4558 | /* if it was static-local previously we need to clear the | |
4559 | * ext flags on replace with remote | |
4560 | */ | |
4561 | if (update_flags & DPLANE_NEIGH_WAS_STATIC) | |
4562 | ext = true; | |
0a27a2fe | 4563 | } else if (!(update_flags & DPLANE_NEIGH_NO_EXTENSION)) { |
ccd187cd AK |
4564 | ext = true; |
4565 | /* local neigh */ | |
4566 | if (update_flags & DPLANE_NEIGH_SET_STATIC) | |
4567 | ext_flags |= NTF_E_MH_PEER_SYNC; | |
ccd187cd | 4568 | } |
ef7b8be4 | 4569 | if (IS_ZEBRA_DEBUG_KERNEL) |
340845e2 | 4570 | zlog_debug( |
0a27a2fe | 4571 | "Tx %s family %s IF %s(%u) Neigh %pIA %s %s flags 0x%x state 0x%x %sext_flags 0x%x", |
340845e2 JU |
4572 | nl_msg_type_to_str(cmd), nl_family_to_str(family), |
4573 | dplane_ctx_get_ifname(ctx), dplane_ctx_get_ifindex(ctx), | |
64a29a00 | 4574 | ip, link_ip ? "Link" : "MAC", buf2, flags, state, |
0a27a2fe | 4575 | ext ? "ext " : "", ext_flags); |
d62a17ae | 4576 | |
18f60fe9 | 4577 | return netlink_neigh_update_msg_encode( |
0a27a2fe PG |
4578 | ctx, cmd, link_ptr, llalen, ip, true, family, RTN_UNICAST, |
4579 | flags, state, 0 /*nhg*/, false /*nfy*/, 0 /*nfy_flags*/, ext, | |
88217099 | 4580 | ext_flags, buf, buflen, proto); |
2232a77c | 4581 | } |
4582 | ||
e18747a9 PG |
4583 | static int netlink_neigh_table_update_ctx(const struct zebra_dplane_ctx *ctx, |
4584 | void *data, size_t datalen) | |
4585 | { | |
4586 | struct { | |
4587 | struct nlmsghdr n; | |
4588 | struct ndtmsg ndtm; | |
4589 | char buf[]; | |
4590 | } *req = data; | |
4591 | struct rtattr *nest; | |
4592 | uint8_t family; | |
4593 | ifindex_t idx; | |
4594 | uint32_t val; | |
4595 | ||
4596 | if (datalen < sizeof(*req)) | |
4597 | return 0; | |
4598 | memset(req, 0, sizeof(*req)); | |
4599 | family = dplane_ctx_neightable_get_family(ctx); | |
4600 | idx = dplane_ctx_get_ifindex(ctx); | |
4601 | ||
4602 | req->n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndtmsg)); | |
4603 | req->n.nlmsg_flags = NLM_F_REQUEST | NLM_F_REPLACE; | |
4604 | req->n.nlmsg_type = RTM_SETNEIGHTBL; | |
4605 | req->ndtm.ndtm_family = family; | |
4606 | ||
4607 | nl_attr_put(&req->n, datalen, NDTA_NAME, | |
4608 | family == AF_INET ? "arp_cache" : "ndisc_cache", 10); | |
4609 | nest = nl_attr_nest(&req->n, datalen, NDTA_PARMS); | |
4610 | if (nest == NULL) | |
4611 | return 0; | |
4612 | if (!nl_attr_put(&req->n, datalen, NDTPA_IFINDEX, &idx, sizeof(idx))) | |
4613 | return 0; | |
4614 | val = dplane_ctx_neightable_get_app_probes(ctx); | |
4615 | if (!nl_attr_put(&req->n, datalen, NDTPA_APP_PROBES, &val, sizeof(val))) | |
4616 | return 0; | |
4617 | val = dplane_ctx_neightable_get_mcast_probes(ctx); | |
4618 | if (!nl_attr_put(&req->n, datalen, NDTPA_MCAST_PROBES, &val, | |
4619 | sizeof(val))) | |
4620 | return 0; | |
4621 | val = dplane_ctx_neightable_get_ucast_probes(ctx); | |
4622 | if (!nl_attr_put(&req->n, datalen, NDTPA_UCAST_PROBES, &val, | |
4623 | sizeof(val))) | |
4624 | return 0; | |
4625 | nl_attr_nest_end(&req->n, nest); | |
4626 | ||
4627 | return NLMSG_ALIGN(req->n.nlmsg_len); | |
4628 | } | |
4629 | ||
67e3369e JU |
4630 | static ssize_t netlink_neigh_msg_encoder(struct zebra_dplane_ctx *ctx, |
4631 | void *buf, size_t buflen) | |
2232a77c | 4632 | { |
a98701f0 | 4633 | ssize_t ret = 0; |
2232a77c | 4634 | |
931fa60c MS |
4635 | switch (dplane_ctx_get_op(ctx)) { |
4636 | case DPLANE_OP_NEIGH_INSTALL: | |
4637 | case DPLANE_OP_NEIGH_UPDATE: | |
d68e74b4 | 4638 | case DPLANE_OP_NEIGH_DISCOVER: |
0a27a2fe | 4639 | case DPLANE_OP_NEIGH_IP_INSTALL: |
67e3369e | 4640 | ret = netlink_neigh_update_ctx(ctx, RTM_NEWNEIGH, buf, buflen); |
931fa60c MS |
4641 | break; |
4642 | case DPLANE_OP_NEIGH_DELETE: | |
0a27a2fe | 4643 | case DPLANE_OP_NEIGH_IP_DELETE: |
67e3369e | 4644 | ret = netlink_neigh_update_ctx(ctx, RTM_DELNEIGH, buf, buflen); |
931fa60c | 4645 | break; |
0bbd4ff4 | 4646 | case DPLANE_OP_VTEP_ADD: |
67e3369e JU |
4647 | ret = netlink_vxlan_flood_update_ctx(ctx, RTM_NEWNEIGH, buf, |
4648 | buflen); | |
0bbd4ff4 MS |
4649 | break; |
4650 | case DPLANE_OP_VTEP_DELETE: | |
67e3369e JU |
4651 | ret = netlink_vxlan_flood_update_ctx(ctx, RTM_DELNEIGH, buf, |
4652 | buflen); | |
0bbd4ff4 | 4653 | break; |
e18747a9 PG |
4654 | case DPLANE_OP_NEIGH_TABLE_UPDATE: |
4655 | ret = netlink_neigh_table_update_ctx(ctx, buf, buflen); | |
4656 | break; | |
a98701f0 DS |
4657 | case DPLANE_OP_ROUTE_INSTALL: |
4658 | case DPLANE_OP_ROUTE_UPDATE: | |
4659 | case DPLANE_OP_ROUTE_DELETE: | |
4660 | case DPLANE_OP_ROUTE_NOTIFY: | |
4661 | case DPLANE_OP_NH_INSTALL: | |
4662 | case DPLANE_OP_NH_UPDATE: | |
4663 | case DPLANE_OP_NH_DELETE: | |
4664 | case DPLANE_OP_LSP_INSTALL: | |
4665 | case DPLANE_OP_LSP_UPDATE: | |
4666 | case DPLANE_OP_LSP_DELETE: | |
4667 | case DPLANE_OP_LSP_NOTIFY: | |
4668 | case DPLANE_OP_PW_INSTALL: | |
4669 | case DPLANE_OP_PW_UNINSTALL: | |
4670 | case DPLANE_OP_SYS_ROUTE_ADD: | |
4671 | case DPLANE_OP_SYS_ROUTE_DELETE: | |
4672 | case DPLANE_OP_ADDR_INSTALL: | |
4673 | case DPLANE_OP_ADDR_UNINSTALL: | |
4674 | case DPLANE_OP_MAC_INSTALL: | |
4675 | case DPLANE_OP_MAC_DELETE: | |
4676 | case DPLANE_OP_RULE_ADD: | |
4677 | case DPLANE_OP_RULE_DELETE: | |
4678 | case DPLANE_OP_RULE_UPDATE: | |
4679 | case DPLANE_OP_BR_PORT_UPDATE: | |
4680 | case DPLANE_OP_IPTABLE_ADD: | |
4681 | case DPLANE_OP_IPTABLE_DELETE: | |
4682 | case DPLANE_OP_IPSET_ADD: | |
4683 | case DPLANE_OP_IPSET_DELETE: | |
4684 | case DPLANE_OP_IPSET_ENTRY_ADD: | |
4685 | case DPLANE_OP_IPSET_ENTRY_DELETE: | |
4686 | case DPLANE_OP_GRE_SET: | |
4687 | case DPLANE_OP_INTF_ADDR_ADD: | |
4688 | case DPLANE_OP_INTF_ADDR_DEL: | |
4689 | case DPLANE_OP_INTF_NETCONFIG: | |
4690 | case DPLANE_OP_INTF_INSTALL: | |
4691 | case DPLANE_OP_INTF_UPDATE: | |
4692 | case DPLANE_OP_INTF_DELETE: | |
4693 | case DPLANE_OP_TC_QDISC_INSTALL: | |
4694 | case DPLANE_OP_TC_QDISC_UNINSTALL: | |
4695 | case DPLANE_OP_TC_CLASS_ADD: | |
4696 | case DPLANE_OP_TC_CLASS_DELETE: | |
4697 | case DPLANE_OP_TC_CLASS_UPDATE: | |
4698 | case DPLANE_OP_TC_FILTER_ADD: | |
4699 | case DPLANE_OP_TC_FILTER_DELETE: | |
4700 | case DPLANE_OP_TC_FILTER_UPDATE: | |
4701 | case DPLANE_OP_NONE: | |
67e3369e | 4702 | ret = -1; |
931fa60c | 4703 | } |
2232a77c | 4704 | |
67e3369e JU |
4705 | return ret; |
4706 | } | |
4707 | ||
4708 | /* | |
4709 | * Update MAC, using dataplane context object. | |
4710 | */ | |
4711 | ||
67e3369e JU |
4712 | enum netlink_msg_status netlink_put_mac_update_msg(struct nl_batch *bth, |
4713 | struct zebra_dplane_ctx *ctx) | |
4714 | { | |
4715 | return netlink_batch_add_msg(bth, ctx, netlink_macfdb_update_ctx, | |
4716 | false); | |
4717 | } | |
4718 | ||
67e3369e JU |
4719 | enum netlink_msg_status |
4720 | netlink_put_neigh_update_msg(struct nl_batch *bth, struct zebra_dplane_ctx *ctx) | |
4721 | { | |
4722 | return netlink_batch_add_msg(bth, ctx, netlink_neigh_msg_encoder, | |
4723 | false); | |
6fe2b0e6 CS |
4724 | } |
4725 | ||
16c628de MS |
4726 | /* |
4727 | * MPLS label forwarding table change via netlink interface, using dataplane | |
4728 | * context information. | |
4729 | */ | |
0be6e7d7 JU |
4730 | ssize_t netlink_mpls_multipath_msg_encode(int cmd, struct zebra_dplane_ctx *ctx, |
4731 | void *buf, size_t buflen) | |
16c628de MS |
4732 | { |
4733 | mpls_lse_t lse; | |
ee70f629 | 4734 | const struct nhlfe_list_head *head; |
f2595bd5 | 4735 | const struct zebra_nhlfe *nhlfe; |
16c628de MS |
4736 | struct nexthop *nexthop = NULL; |
4737 | unsigned int nexthop_num; | |
4738 | const char *routedesc; | |
4739 | int route_type; | |
9a0132a5 | 4740 | struct prefix p = {0}; |
d4000d7b DS |
4741 | struct nlsock *nl = |
4742 | kernel_netlink_nlsock_lookup(dplane_ctx_get_ns_sock(ctx)); | |
16c628de MS |
4743 | |
4744 | struct { | |
4745 | struct nlmsghdr n; | |
4746 | struct rtmsg r; | |
0be6e7d7 JU |
4747 | char buf[0]; |
4748 | } *req = buf; | |
4749 | ||
4750 | if (buflen < sizeof(*req)) | |
4751 | return 0; | |
16c628de | 4752 | |
0be6e7d7 | 4753 | memset(req, 0, sizeof(*req)); |
16c628de MS |
4754 | |
4755 | /* | |
4756 | * Count # nexthops so we can decide whether to use singlepath | |
4757 | * or multipath case. | |
4758 | */ | |
4759 | nexthop_num = 0; | |
ee70f629 MS |
4760 | head = dplane_ctx_get_nhlfe_list(ctx); |
4761 | frr_each(nhlfe_list_const, head, nhlfe) { | |
16c628de MS |
4762 | nexthop = nhlfe->nexthop; |
4763 | if (!nexthop) | |
4764 | continue; | |
4765 | if (cmd == RTM_NEWROUTE) { | |
4766 | /* Count all selected NHLFEs */ | |
4767 | if (CHECK_FLAG(nhlfe->flags, NHLFE_FLAG_SELECTED) | |
4768 | && CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE)) | |
4769 | nexthop_num++; | |
4770 | } else { /* DEL */ | |
4771 | /* Count all installed NHLFEs */ | |
4772 | if (CHECK_FLAG(nhlfe->flags, NHLFE_FLAG_INSTALLED) | |
4773 | && CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB)) | |
4774 | nexthop_num++; | |
4775 | } | |
4776 | } | |
4777 | ||
4778 | if ((nexthop_num == 0) || | |
4779 | (!dplane_ctx_get_best_nhlfe(ctx) && (cmd != RTM_DELROUTE))) | |
4780 | return 0; | |
4781 | ||
0be6e7d7 JU |
4782 | req->n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)); |
4783 | req->n.nlmsg_flags = NLM_F_CREATE | NLM_F_REQUEST; | |
4784 | req->n.nlmsg_type = cmd; | |
d4000d7b | 4785 | req->n.nlmsg_pid = nl->snl.nl_pid; |
16c628de | 4786 | |
0be6e7d7 JU |
4787 | req->r.rtm_family = AF_MPLS; |
4788 | req->r.rtm_table = RT_TABLE_MAIN; | |
4789 | req->r.rtm_dst_len = MPLS_LABEL_LEN_BITS; | |
4790 | req->r.rtm_scope = RT_SCOPE_UNIVERSE; | |
4791 | req->r.rtm_type = RTN_UNICAST; | |
16c628de MS |
4792 | |
4793 | if (cmd == RTM_NEWROUTE) { | |
4794 | /* We do a replace to handle update. */ | |
0be6e7d7 | 4795 | req->n.nlmsg_flags |= NLM_F_REPLACE; |
16c628de MS |
4796 | |
4797 | /* set the protocol value if installing */ | |
4798 | route_type = re_type_from_lsp_type( | |
4799 | dplane_ctx_get_best_nhlfe(ctx)->type); | |
0be6e7d7 | 4800 | req->r.rtm_protocol = zebra2proto(route_type); |
16c628de MS |
4801 | } |
4802 | ||
4803 | /* Fill destination */ | |
4804 | lse = mpls_lse_encode(dplane_ctx_get_in_label(ctx), 0, 0, 1); | |
0be6e7d7 JU |
4805 | if (!nl_attr_put(&req->n, buflen, RTA_DST, &lse, sizeof(mpls_lse_t))) |
4806 | return 0; | |
16c628de MS |
4807 | |
4808 | /* Fill nexthops (paths) based on single-path or multipath. The paths | |
4809 | * chosen depend on the operation. | |
4810 | */ | |
fc608372 | 4811 | if (nexthop_num == 1) { |
16c628de MS |
4812 | routedesc = "single-path"; |
4813 | _netlink_mpls_debug(cmd, dplane_ctx_get_in_label(ctx), | |
4814 | routedesc); | |
4815 | ||
4816 | nexthop_num = 0; | |
ee70f629 | 4817 | frr_each(nhlfe_list_const, head, nhlfe) { |
16c628de MS |
4818 | nexthop = nhlfe->nexthop; |
4819 | if (!nexthop) | |
4820 | continue; | |
4821 | ||
4822 | if ((cmd == RTM_NEWROUTE | |
4823 | && (CHECK_FLAG(nhlfe->flags, NHLFE_FLAG_SELECTED) | |
4824 | && CHECK_FLAG(nexthop->flags, | |
4825 | NEXTHOP_FLAG_ACTIVE))) | |
4826 | || (cmd == RTM_DELROUTE | |
4827 | && (CHECK_FLAG(nhlfe->flags, | |
4828 | NHLFE_FLAG_INSTALLED) | |
4829 | && CHECK_FLAG(nexthop->flags, | |
4830 | NEXTHOP_FLAG_FIB)))) { | |
4831 | /* Add the gateway */ | |
0be6e7d7 JU |
4832 | if (!_netlink_mpls_build_singlepath( |
4833 | &p, routedesc, nhlfe, &req->n, | |
4834 | &req->r, buflen, cmd)) | |
4835 | return false; | |
16c628de MS |
4836 | |
4837 | nexthop_num++; | |
4838 | break; | |
4839 | } | |
4840 | } | |
4841 | } else { /* Multipath case */ | |
312a6bee | 4842 | struct rtattr *nest; |
81793ac1 | 4843 | const union g_addr *src1 = NULL; |
16c628de | 4844 | |
0be6e7d7 JU |
4845 | nest = nl_attr_nest(&req->n, buflen, RTA_MULTIPATH); |
4846 | if (!nest) | |
4847 | return 0; | |
16c628de MS |
4848 | |
4849 | routedesc = "multipath"; | |
4850 | _netlink_mpls_debug(cmd, dplane_ctx_get_in_label(ctx), | |
4851 | routedesc); | |
4852 | ||
4853 | nexthop_num = 0; | |
ee70f629 | 4854 | frr_each(nhlfe_list_const, head, nhlfe) { |
16c628de MS |
4855 | nexthop = nhlfe->nexthop; |
4856 | if (!nexthop) | |
4857 | continue; | |
4858 | ||
16c628de MS |
4859 | if ((cmd == RTM_NEWROUTE |
4860 | && (CHECK_FLAG(nhlfe->flags, NHLFE_FLAG_SELECTED) | |
4861 | && CHECK_FLAG(nexthop->flags, | |
4862 | NEXTHOP_FLAG_ACTIVE))) | |
4863 | || (cmd == RTM_DELROUTE | |
4864 | && (CHECK_FLAG(nhlfe->flags, | |
4865 | NHLFE_FLAG_INSTALLED) | |
4866 | && CHECK_FLAG(nexthop->flags, | |
4867 | NEXTHOP_FLAG_FIB)))) { | |
4868 | nexthop_num++; | |
4869 | ||
4870 | /* Build the multipath */ | |
0be6e7d7 JU |
4871 | if (!_netlink_mpls_build_multipath( |
4872 | &p, routedesc, nhlfe, &req->n, | |
4873 | buflen, &req->r, &src1)) | |
4874 | return 0; | |
16c628de MS |
4875 | } |
4876 | } | |
4877 | ||
4878 | /* Add the multipath */ | |
0be6e7d7 | 4879 | nl_attr_nest_end(&req->n, nest); |
16c628de MS |
4880 | } |
4881 | ||
0be6e7d7 | 4882 | return NLMSG_ALIGN(req->n.nlmsg_len); |
16c628de | 4883 | } |
506efd37 AK |
4884 | |
4885 | /**************************************************************************** | |
4886 | * This code was developed in a branch that didn't have dplane APIs for | |
4887 | * MAC updates. Hence the use of the legacy style. It will be moved to | |
4888 | * the new dplane style pre-merge to master. XXX | |
4889 | */ | |
4890 | static int netlink_fdb_nh_update(uint32_t nh_id, struct in_addr vtep_ip) | |
4891 | { | |
4892 | struct { | |
4893 | struct nlmsghdr n; | |
4894 | struct nhmsg nhm; | |
4895 | char buf[256]; | |
4896 | } req; | |
4897 | int cmd = RTM_NEWNEXTHOP; | |
4898 | struct zebra_vrf *zvrf; | |
4899 | struct zebra_ns *zns; | |
4900 | ||
4901 | zvrf = zebra_vrf_get_evpn(); | |
506efd37 AK |
4902 | zns = zvrf->zns; |
4903 | ||
4904 | memset(&req, 0, sizeof(req)); | |
4905 | ||
4906 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct nhmsg)); | |
4907 | req.n.nlmsg_flags = NLM_F_REQUEST; | |
4908 | req.n.nlmsg_flags |= (NLM_F_CREATE | NLM_F_REPLACE); | |
4909 | req.n.nlmsg_type = cmd; | |
4910 | req.nhm.nh_family = AF_INET; | |
4911 | ||
4912 | if (!nl_attr_put32(&req.n, sizeof(req), NHA_ID, nh_id)) | |
4913 | return -1; | |
4914 | if (!nl_attr_put(&req.n, sizeof(req), NHA_FDB, NULL, 0)) | |
4915 | return -1; | |
4916 | if (!nl_attr_put(&req.n, sizeof(req), NHA_GATEWAY, | |
4917 | &vtep_ip, IPV4_MAX_BYTELEN)) | |
4918 | return -1; | |
4919 | ||
4920 | if (IS_ZEBRA_DEBUG_KERNEL || IS_ZEBRA_DEBUG_EVPN_MH_NH) { | |
9bcef951 MS |
4921 | zlog_debug("Tx %s fdb-nh 0x%x %pI4", |
4922 | nl_msg_type_to_str(cmd), nh_id, &vtep_ip); | |
506efd37 AK |
4923 | } |
4924 | ||
4925 | return netlink_talk(netlink_talk_filter, &req.n, &zns->netlink_cmd, zns, | |
9bfadae8 | 4926 | false); |
506efd37 AK |
4927 | } |
4928 | ||
4929 | static int netlink_fdb_nh_del(uint32_t nh_id) | |
4930 | { | |
4931 | struct { | |
4932 | struct nlmsghdr n; | |
4933 | struct nhmsg nhm; | |
4934 | char buf[256]; | |
4935 | } req; | |
4936 | int cmd = RTM_DELNEXTHOP; | |
4937 | struct zebra_vrf *zvrf; | |
4938 | struct zebra_ns *zns; | |
4939 | ||
4940 | zvrf = zebra_vrf_get_evpn(); | |
506efd37 AK |
4941 | zns = zvrf->zns; |
4942 | ||
4943 | memset(&req, 0, sizeof(req)); | |
4944 | ||
4945 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct nhmsg)); | |
4946 | req.n.nlmsg_flags = NLM_F_REQUEST; | |
4947 | req.n.nlmsg_type = cmd; | |
4948 | req.nhm.nh_family = AF_UNSPEC; | |
4949 | ||
4950 | if (!nl_attr_put32(&req.n, sizeof(req), NHA_ID, nh_id)) | |
4951 | return -1; | |
4952 | ||
4953 | if (IS_ZEBRA_DEBUG_KERNEL || IS_ZEBRA_DEBUG_EVPN_MH_NH) { | |
4954 | zlog_debug("Tx %s fdb-nh 0x%x", | |
4955 | nl_msg_type_to_str(cmd), nh_id); | |
4956 | } | |
4957 | ||
4958 | return netlink_talk(netlink_talk_filter, &req.n, &zns->netlink_cmd, zns, | |
9bfadae8 | 4959 | false); |
506efd37 AK |
4960 | } |
4961 | ||
4962 | static int netlink_fdb_nhg_update(uint32_t nhg_id, uint32_t nh_cnt, | |
4963 | struct nh_grp *nh_ids) | |
4964 | { | |
4965 | struct { | |
4966 | struct nlmsghdr n; | |
4967 | struct nhmsg nhm; | |
4968 | char buf[256]; | |
4969 | } req; | |
4970 | int cmd = RTM_NEWNEXTHOP; | |
4971 | struct zebra_vrf *zvrf; | |
4972 | struct zebra_ns *zns; | |
4973 | struct nexthop_grp grp[nh_cnt]; | |
4974 | uint32_t i; | |
4975 | ||
4976 | zvrf = zebra_vrf_get_evpn(); | |
506efd37 AK |
4977 | zns = zvrf->zns; |
4978 | ||
4979 | memset(&req, 0, sizeof(req)); | |
4980 | ||
4981 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct nhmsg)); | |
4982 | req.n.nlmsg_flags = NLM_F_REQUEST; | |
4983 | req.n.nlmsg_flags |= (NLM_F_CREATE | NLM_F_REPLACE); | |
4984 | req.n.nlmsg_type = cmd; | |
4985 | req.nhm.nh_family = AF_UNSPEC; | |
4986 | ||
4987 | if (!nl_attr_put32(&req.n, sizeof(req), NHA_ID, nhg_id)) | |
4988 | return -1; | |
4989 | if (!nl_attr_put(&req.n, sizeof(req), NHA_FDB, NULL, 0)) | |
4990 | return -1; | |
4991 | memset(&grp, 0, sizeof(grp)); | |
4992 | for (i = 0; i < nh_cnt; ++i) { | |
4993 | grp[i].id = nh_ids[i].id; | |
4994 | grp[i].weight = nh_ids[i].weight; | |
4995 | } | |
4996 | if (!nl_attr_put(&req.n, sizeof(req), NHA_GROUP, | |
4997 | grp, nh_cnt * sizeof(struct nexthop_grp))) | |
4998 | return -1; | |
4999 | ||
5000 | ||
5001 | if (IS_ZEBRA_DEBUG_KERNEL || IS_ZEBRA_DEBUG_EVPN_MH_NH) { | |
5002 | char vtep_str[ES_VTEP_LIST_STR_SZ]; | |
9e0c2fd1 | 5003 | char nh_buf[16]; |
506efd37 AK |
5004 | |
5005 | vtep_str[0] = '\0'; | |
5006 | for (i = 0; i < nh_cnt; ++i) { | |
9e0c2fd1 | 5007 | snprintf(nh_buf, sizeof(nh_buf), "%u ", |
506efd37 | 5008 | grp[i].id); |
9e0c2fd1 | 5009 | strlcat(vtep_str, nh_buf, sizeof(vtep_str)); |
506efd37 AK |
5010 | } |
5011 | ||
5012 | zlog_debug("Tx %s fdb-nhg 0x%x %s", | |
5013 | nl_msg_type_to_str(cmd), nhg_id, vtep_str); | |
5014 | } | |
5015 | ||
5016 | return netlink_talk(netlink_talk_filter, &req.n, &zns->netlink_cmd, zns, | |
9bfadae8 | 5017 | false); |
506efd37 AK |
5018 | } |
5019 | ||
5020 | static int netlink_fdb_nhg_del(uint32_t nhg_id) | |
5021 | { | |
5022 | return netlink_fdb_nh_del(nhg_id); | |
5023 | } | |
5024 | ||
5025 | int kernel_upd_mac_nh(uint32_t nh_id, struct in_addr vtep_ip) | |
5026 | { | |
5027 | return netlink_fdb_nh_update(nh_id, vtep_ip); | |
5028 | } | |
5029 | ||
5030 | int kernel_del_mac_nh(uint32_t nh_id) | |
5031 | { | |
5032 | return netlink_fdb_nh_del(nh_id); | |
5033 | } | |
5034 | ||
5035 | int kernel_upd_mac_nhg(uint32_t nhg_id, uint32_t nh_cnt, | |
5036 | struct nh_grp *nh_ids) | |
5037 | { | |
5038 | return netlink_fdb_nhg_update(nhg_id, nh_cnt, nh_ids); | |
5039 | } | |
5040 | ||
5041 | int kernel_del_mac_nhg(uint32_t nhg_id) | |
5042 | { | |
5043 | return netlink_fdb_nhg_del(nhg_id); | |
5044 | } | |
5045 | ||
ddfeb486 | 5046 | #endif /* HAVE_NETLINK */ |