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718e3744 | 1 | /* Kernel routing table updates using netlink over GNU/Linux system. |
2 | * Copyright (C) 1997, 98, 99 Kunihiro Ishiguro | |
3 | * | |
4 | * This file is part of GNU Zebra. | |
5 | * | |
6 | * GNU Zebra is free software; you can redistribute it and/or modify it | |
7 | * under the terms of the GNU General Public License as published by the | |
8 | * Free Software Foundation; either version 2, or (at your option) any | |
9 | * later version. | |
10 | * | |
11 | * GNU Zebra is distributed in the hope that it will be useful, but | |
12 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | * General Public License for more details. | |
15 | * | |
896014f4 DL |
16 | * You should have received a copy of the GNU General Public License along |
17 | * with this program; see the file COPYING; if not, write to the Free Software | |
18 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
718e3744 | 19 | */ |
20 | ||
21 | #include <zebra.h> | |
ddfeb486 DL |
22 | |
23 | #ifdef HAVE_NETLINK | |
24 | ||
8689b25a HS |
25 | /* The following definition is to workaround an issue in the Linux kernel |
26 | * header files with redefinition of 'struct in6_addr' in both | |
27 | * netinet/in.h and linux/in6.h. | |
28 | * Reference - https://sourceware.org/ml/libc-alpha/2013-01/msg00599.html | |
29 | */ | |
30 | #define _LINUX_IN6_H | |
31 | ||
8ccc7e80 | 32 | #include <net/if_arp.h> |
ba777396 RW |
33 | #include <linux/lwtunnel.h> |
34 | #include <linux/mpls_iptunnel.h> | |
8689b25a HS |
35 | #include <linux/seg6_iptunnel.h> |
36 | #include <linux/seg6_local.h> | |
ba777396 RW |
37 | #include <linux/neighbour.h> |
38 | #include <linux/rtnetlink.h> | |
d9f5b2f5 | 39 | #include <linux/nexthop.h> |
718e3744 | 40 | |
41 | /* Hack for GNU libc version 2. */ | |
42 | #ifndef MSG_TRUNC | |
43 | #define MSG_TRUNC 0x20 | |
44 | #endif /* MSG_TRUNC */ | |
45 | ||
46 | #include "linklist.h" | |
47 | #include "if.h" | |
48 | #include "log.h" | |
49 | #include "prefix.h" | |
8689b25a HS |
50 | #include "plist.h" |
51 | #include "plist_int.h" | |
718e3744 | 52 | #include "connected.h" |
53 | #include "table.h" | |
26e2ae36 | 54 | #include "memory.h" |
718e3744 | 55 | #include "rib.h" |
e04ab74d | 56 | #include "thread.h" |
edd7c245 | 57 | #include "privs.h" |
fb018d25 | 58 | #include "nexthop.h" |
78104b9b | 59 | #include "vrf.h" |
5e6a74d8 | 60 | #include "vty.h" |
40c7bdb0 | 61 | #include "mpls.h" |
13d60d35 | 62 | #include "vxlan.h" |
8d03bc50 | 63 | #include "printfrr.h" |
718e3744 | 64 | |
bf094f69 | 65 | #include "zebra/zapi_msg.h" |
fe18ee2d | 66 | #include "zebra/zebra_ns.h" |
7c551956 | 67 | #include "zebra/zebra_vrf.h" |
6621ca86 | 68 | #include "zebra/rt.h" |
718e3744 | 69 | #include "zebra/redistribute.h" |
70 | #include "zebra/interface.h" | |
71 | #include "zebra/debug.h" | |
12f6fb97 | 72 | #include "zebra/rtadv.h" |
567b877d | 73 | #include "zebra/zebra_ptm.h" |
40c7bdb0 | 74 | #include "zebra/zebra_mpls.h" |
1fdc9eae | 75 | #include "zebra/kernel_netlink.h" |
76 | #include "zebra/rt_netlink.h" | |
d9f5b2f5 | 77 | #include "zebra/zebra_nhg.h" |
e3be0432 | 78 | #include "zebra/zebra_mroute.h" |
2232a77c | 79 | #include "zebra/zebra_vxlan.h" |
364fed6b | 80 | #include "zebra/zebra_errors.h" |
506efd37 | 81 | #include "zebra/zebra_evpn_mh.h" |
1d80c209 | 82 | #include "zebra/zebra_trace.h" |
e3be0432 | 83 | |
40c7bdb0 | 84 | #ifndef AF_MPLS |
85 | #define AF_MPLS 28 | |
86 | #endif | |
87 | ||
d87ed8d7 AK |
88 | /* Re-defining as I am unable to include <linux/if_bridge.h> which has the |
89 | * UAPI for MAC sync. */ | |
90 | #ifndef _UAPI_LINUX_IF_BRIDGE_H | |
4bcdb608 | 91 | #define BR_SPH_LIST_SIZE 10 |
d87ed8d7 AK |
92 | #endif |
93 | ||
2232a77c | 94 | static vlanid_t filter_vlan = 0; |
95 | ||
7c99d51b MS |
96 | /* We capture whether the current kernel supports nexthop ids; by |
97 | * default, we'll use them if possible. There's also a configuration | |
98 | * available to _disable_ use of kernel nexthops. | |
99 | */ | |
fec211ad | 100 | static bool supports_nh; |
81505946 | 101 | |
d62a17ae | 102 | struct gw_family_t { |
d7c0a89a QY |
103 | uint16_t filler; |
104 | uint16_t family; | |
d62a17ae | 105 | union g_addr gate; |
40c7bdb0 | 106 | }; |
107 | ||
2b64873d DL |
108 | static const char ipv4_ll_buf[16] = "169.254.0.1"; |
109 | static struct in_addr ipv4_ll; | |
8755598a | 110 | |
002e5c43 SW |
111 | /* Is this a ipv4 over ipv6 route? */ |
112 | static bool is_route_v4_over_v6(unsigned char rtm_family, | |
113 | enum nexthop_types_t nexthop_type) | |
114 | { | |
115 | if (rtm_family == AF_INET | |
116 | && (nexthop_type == NEXTHOP_TYPE_IPV6 | |
117 | || nexthop_type == NEXTHOP_TYPE_IPV6_IFINDEX)) | |
118 | return true; | |
119 | ||
120 | return false; | |
121 | } | |
122 | ||
7c99d51b MS |
123 | /* Helper to control use of kernel-level nexthop ids */ |
124 | static bool kernel_nexthops_supported(void) | |
125 | { | |
d982012a SW |
126 | return (supports_nh && !vrf_is_backend_netns() |
127 | && zebra_nhg_kernel_nexthops_enabled()); | |
7c99d51b MS |
128 | } |
129 | ||
6c67f41f SW |
130 | /* |
131 | * Some people may only want to use NHGs created by protos and not | |
132 | * implicitly created by Zebra. This check accounts for that. | |
133 | */ | |
134 | static bool proto_nexthops_only(void) | |
135 | { | |
136 | return zebra_nhg_proto_nexthops_only(); | |
137 | } | |
138 | ||
139 | /* Is this a proto created NHG? */ | |
140 | static bool is_proto_nhg(uint32_t id, int type) | |
141 | { | |
142 | /* If type is available, use it as the source of truth */ | |
143 | if (type) { | |
144 | if (type != ZEBRA_ROUTE_NHG) | |
145 | return true; | |
146 | return false; | |
147 | } | |
148 | ||
54c89c93 | 149 | if (id >= ZEBRA_NHG_PROTO_LOWER) |
6c67f41f SW |
150 | return true; |
151 | ||
152 | return false; | |
153 | } | |
154 | ||
8755598a DS |
155 | /* |
156 | * The ipv4_ll data structure is used for all 5549 | |
157 | * additions to the kernel. Let's figure out the | |
158 | * correct value one time instead for every | |
159 | * install/remove of a 5549 type route | |
160 | */ | |
d62a17ae | 161 | void rt_netlink_init(void) |
8755598a | 162 | { |
d62a17ae | 163 | inet_pton(AF_INET, ipv4_ll_buf, &ipv4_ll); |
8755598a DS |
164 | } |
165 | ||
931fa60c MS |
166 | /* |
167 | * Mapping from dataplane neighbor flags to netlink flags | |
168 | */ | |
169 | static uint8_t neigh_flags_to_netlink(uint8_t dplane_flags) | |
170 | { | |
171 | uint8_t flags = 0; | |
172 | ||
173 | if (dplane_flags & DPLANE_NTF_EXT_LEARNED) | |
174 | flags |= NTF_EXT_LEARNED; | |
175 | if (dplane_flags & DPLANE_NTF_ROUTER) | |
176 | flags |= NTF_ROUTER; | |
d68e74b4 JU |
177 | if (dplane_flags & DPLANE_NTF_USE) |
178 | flags |= NTF_USE; | |
931fa60c MS |
179 | |
180 | return flags; | |
181 | } | |
182 | ||
183 | /* | |
184 | * Mapping from dataplane neighbor state to netlink state | |
185 | */ | |
186 | static uint16_t neigh_state_to_netlink(uint16_t dplane_state) | |
187 | { | |
188 | uint16_t state = 0; | |
189 | ||
190 | if (dplane_state & DPLANE_NUD_REACHABLE) | |
191 | state |= NUD_REACHABLE; | |
192 | if (dplane_state & DPLANE_NUD_STALE) | |
193 | state |= NUD_STALE; | |
194 | if (dplane_state & DPLANE_NUD_NOARP) | |
195 | state |= NUD_NOARP; | |
196 | if (dplane_state & DPLANE_NUD_PROBE) | |
197 | state |= NUD_PROBE; | |
d68e74b4 JU |
198 | if (dplane_state & DPLANE_NUD_INCOMPLETE) |
199 | state |= NUD_INCOMPLETE; | |
0a27a2fe PG |
200 | if (dplane_state & DPLANE_NUD_PERMANENT) |
201 | state |= NUD_PERMANENT; | |
202 | if (dplane_state & DPLANE_NUD_FAILED) | |
203 | state |= NUD_FAILED; | |
931fa60c MS |
204 | |
205 | return state; | |
206 | } | |
207 | ||
208 | ||
6a6d11a3 | 209 | static inline bool is_selfroute(int proto) |
23b1f334 | 210 | { |
d62a17ae | 211 | if ((proto == RTPROT_BGP) || (proto == RTPROT_OSPF) |
d4d71f11 | 212 | || (proto == RTPROT_ZSTATIC) || (proto == RTPROT_ZEBRA) |
d62a17ae | 213 | || (proto == RTPROT_ISIS) || (proto == RTPROT_RIPNG) |
214 | || (proto == RTPROT_NHRP) || (proto == RTPROT_EIGRP) | |
915902cb | 215 | || (proto == RTPROT_LDP) || (proto == RTPROT_BABEL) |
0761368a | 216 | || (proto == RTPROT_RIP) || (proto == RTPROT_SHARP) |
31f937fb SM |
217 | || (proto == RTPROT_PBR) || (proto == RTPROT_OPENFABRIC) |
218 | || (proto == RTPROT_SRTE)) { | |
6a6d11a3 | 219 | return true; |
d62a17ae | 220 | } |
221 | ||
6a6d11a3 | 222 | return false; |
23b1f334 DD |
223 | } |
224 | ||
915902cb | 225 | static inline int zebra2proto(int proto) |
23b1f334 | 226 | { |
d62a17ae | 227 | switch (proto) { |
228 | case ZEBRA_ROUTE_BABEL: | |
229 | proto = RTPROT_BABEL; | |
230 | break; | |
231 | case ZEBRA_ROUTE_BGP: | |
232 | proto = RTPROT_BGP; | |
233 | break; | |
234 | case ZEBRA_ROUTE_OSPF: | |
235 | case ZEBRA_ROUTE_OSPF6: | |
236 | proto = RTPROT_OSPF; | |
237 | break; | |
238 | case ZEBRA_ROUTE_STATIC: | |
d4d71f11 | 239 | proto = RTPROT_ZSTATIC; |
d62a17ae | 240 | break; |
241 | case ZEBRA_ROUTE_ISIS: | |
242 | proto = RTPROT_ISIS; | |
243 | break; | |
244 | case ZEBRA_ROUTE_RIP: | |
245 | proto = RTPROT_RIP; | |
246 | break; | |
247 | case ZEBRA_ROUTE_RIPNG: | |
248 | proto = RTPROT_RIPNG; | |
249 | break; | |
250 | case ZEBRA_ROUTE_NHRP: | |
251 | proto = RTPROT_NHRP; | |
252 | break; | |
253 | case ZEBRA_ROUTE_EIGRP: | |
254 | proto = RTPROT_EIGRP; | |
255 | break; | |
256 | case ZEBRA_ROUTE_LDP: | |
257 | proto = RTPROT_LDP; | |
258 | break; | |
8a71d93d DS |
259 | case ZEBRA_ROUTE_SHARP: |
260 | proto = RTPROT_SHARP; | |
261 | break; | |
0761368a DS |
262 | case ZEBRA_ROUTE_PBR: |
263 | proto = RTPROT_PBR; | |
264 | break; | |
da82f6b4 CF |
265 | case ZEBRA_ROUTE_OPENFABRIC: |
266 | proto = RTPROT_OPENFABRIC; | |
267 | break; | |
31f937fb SM |
268 | case ZEBRA_ROUTE_SRTE: |
269 | proto = RTPROT_SRTE; | |
270 | break; | |
a56ec5c0 | 271 | case ZEBRA_ROUTE_TABLE: |
38e40db1 | 272 | case ZEBRA_ROUTE_NHG: |
a56ec5c0 DS |
273 | proto = RTPROT_ZEBRA; |
274 | break; | |
911d4d48 DE |
275 | case ZEBRA_ROUTE_CONNECT: |
276 | case ZEBRA_ROUTE_KERNEL: | |
277 | proto = RTPROT_KERNEL; | |
278 | break; | |
d62a17ae | 279 | default: |
0761368a DS |
280 | /* |
281 | * When a user adds a new protocol this will show up | |
282 | * to let them know to do something about it. This | |
283 | * is intentionally a warn because we should see | |
284 | * this as part of development of a new protocol | |
285 | */ | |
9df414fe QY |
286 | zlog_debug( |
287 | "%s: Please add this protocol(%d) to proper rt_netlink.c handling", | |
15569c58 | 288 | __func__, proto); |
d62a17ae | 289 | proto = RTPROT_ZEBRA; |
290 | break; | |
291 | } | |
292 | ||
293 | return proto; | |
23b1f334 DD |
294 | } |
295 | ||
38e40db1 | 296 | static inline int proto2zebra(int proto, int family, bool is_nexthop) |
915902cb DS |
297 | { |
298 | switch (proto) { | |
299 | case RTPROT_BABEL: | |
300 | proto = ZEBRA_ROUTE_BABEL; | |
301 | break; | |
302 | case RTPROT_BGP: | |
303 | proto = ZEBRA_ROUTE_BGP; | |
304 | break; | |
305 | case RTPROT_OSPF: | |
d6816f68 DS |
306 | proto = (family == AF_INET) ? ZEBRA_ROUTE_OSPF |
307 | : ZEBRA_ROUTE_OSPF6; | |
915902cb DS |
308 | break; |
309 | case RTPROT_ISIS: | |
310 | proto = ZEBRA_ROUTE_ISIS; | |
311 | break; | |
312 | case RTPROT_RIP: | |
313 | proto = ZEBRA_ROUTE_RIP; | |
314 | break; | |
315 | case RTPROT_RIPNG: | |
316 | proto = ZEBRA_ROUTE_RIPNG; | |
317 | break; | |
318 | case RTPROT_NHRP: | |
319 | proto = ZEBRA_ROUTE_NHRP; | |
320 | break; | |
321 | case RTPROT_EIGRP: | |
322 | proto = ZEBRA_ROUTE_EIGRP; | |
323 | break; | |
324 | case RTPROT_LDP: | |
325 | proto = ZEBRA_ROUTE_LDP; | |
326 | break; | |
327 | case RTPROT_STATIC: | |
d4d71f11 | 328 | case RTPROT_ZSTATIC: |
915902cb DS |
329 | proto = ZEBRA_ROUTE_STATIC; |
330 | break; | |
0761368a DS |
331 | case RTPROT_SHARP: |
332 | proto = ZEBRA_ROUTE_SHARP; | |
333 | break; | |
334 | case RTPROT_PBR: | |
335 | proto = ZEBRA_ROUTE_PBR; | |
336 | break; | |
da82f6b4 CF |
337 | case RTPROT_OPENFABRIC: |
338 | proto = ZEBRA_ROUTE_OPENFABRIC; | |
339 | break; | |
31f937fb SM |
340 | case RTPROT_SRTE: |
341 | proto = ZEBRA_ROUTE_SRTE; | |
342 | break; | |
38e40db1 SW |
343 | case RTPROT_ZEBRA: |
344 | if (is_nexthop) { | |
345 | proto = ZEBRA_ROUTE_NHG; | |
346 | break; | |
347 | } | |
348 | /* Intentional fall thru */ | |
915902cb | 349 | default: |
0761368a DS |
350 | /* |
351 | * When a user adds a new protocol this will show up | |
352 | * to let them know to do something about it. This | |
353 | * is intentionally a warn because we should see | |
354 | * this as part of development of a new protocol | |
355 | */ | |
9df414fe QY |
356 | zlog_debug( |
357 | "%s: Please add this protocol(%d) to proper rt_netlink.c handling", | |
15569c58 | 358 | __func__, proto); |
915902cb DS |
359 | proto = ZEBRA_ROUTE_KERNEL; |
360 | break; | |
361 | } | |
362 | return proto; | |
363 | } | |
364 | ||
12f6fb97 DS |
365 | /* |
366 | Pending: create an efficient table_id (in a tree/hash) based lookup) | |
367 | */ | |
9d866c07 | 368 | vrf_id_t vrf_lookup_by_table(uint32_t table_id, ns_id_t ns_id) |
12f6fb97 | 369 | { |
d62a17ae | 370 | struct vrf *vrf; |
371 | struct zebra_vrf *zvrf; | |
12f6fb97 | 372 | |
a2addae8 | 373 | RB_FOREACH (vrf, vrf_id_head, &vrfs_by_id) { |
78dd30b2 PG |
374 | zvrf = vrf->info; |
375 | if (zvrf == NULL) | |
d62a17ae | 376 | continue; |
78dd30b2 PG |
377 | /* case vrf with netns : match the netnsid */ |
378 | if (vrf_is_backend_netns()) { | |
379 | if (ns_id == zvrf_id(zvrf)) | |
380 | return zvrf_id(zvrf); | |
381 | } else { | |
382 | /* VRF is VRF_BACKEND_VRF_LITE */ | |
383 | if (zvrf->table_id != table_id) | |
384 | continue; | |
385 | return zvrf_id(zvrf); | |
386 | } | |
d62a17ae | 387 | } |
12f6fb97 | 388 | |
d62a17ae | 389 | return VRF_DEFAULT; |
12f6fb97 DS |
390 | } |
391 | ||
87da6a60 SW |
392 | /** |
393 | * @parse_encap_mpls() - Parses encapsulated mpls attributes | |
394 | * @tb: Pointer to rtattr to look for nested items in. | |
395 | * @labels: Pointer to store labels in. | |
396 | * | |
397 | * Return: Number of mpls labels found. | |
398 | */ | |
399 | static int parse_encap_mpls(struct rtattr *tb, mpls_label_t *labels) | |
400 | { | |
401 | struct rtattr *tb_encap[MPLS_IPTUNNEL_MAX + 1] = {0}; | |
402 | mpls_lse_t *lses = NULL; | |
403 | int num_labels = 0; | |
404 | uint32_t ttl = 0; | |
405 | uint32_t bos = 0; | |
406 | uint32_t exp = 0; | |
407 | mpls_label_t label = 0; | |
408 | ||
409 | netlink_parse_rtattr_nested(tb_encap, MPLS_IPTUNNEL_MAX, tb); | |
410 | lses = (mpls_lse_t *)RTA_DATA(tb_encap[MPLS_IPTUNNEL_DST]); | |
411 | while (!bos && num_labels < MPLS_MAX_LABELS) { | |
412 | mpls_lse_decode(lses[num_labels], &label, &ttl, &exp, &bos); | |
413 | labels[num_labels++] = label; | |
414 | } | |
415 | ||
416 | return num_labels; | |
417 | } | |
418 | ||
d49e6c4a HS |
419 | static enum seg6local_action_t |
420 | parse_encap_seg6local(struct rtattr *tb, | |
421 | struct seg6local_context *ctx) | |
422 | { | |
1bda3e62 | 423 | struct rtattr *tb_encap[256] = {}; |
d49e6c4a HS |
424 | enum seg6local_action_t act = ZEBRA_SEG6_LOCAL_ACTION_UNSPEC; |
425 | ||
426 | netlink_parse_rtattr_nested(tb_encap, 256, tb); | |
427 | ||
428 | if (tb_encap[SEG6_LOCAL_ACTION]) | |
429 | act = *(uint32_t *)RTA_DATA(tb_encap[SEG6_LOCAL_ACTION]); | |
430 | ||
431 | if (tb_encap[SEG6_LOCAL_NH4]) | |
432 | ctx->nh4 = *(struct in_addr *)RTA_DATA( | |
433 | tb_encap[SEG6_LOCAL_NH4]); | |
434 | ||
435 | if (tb_encap[SEG6_LOCAL_NH6]) | |
436 | ctx->nh6 = *(struct in6_addr *)RTA_DATA( | |
437 | tb_encap[SEG6_LOCAL_NH6]); | |
438 | ||
439 | if (tb_encap[SEG6_LOCAL_TABLE]) | |
440 | ctx->table = *(uint32_t *)RTA_DATA(tb_encap[SEG6_LOCAL_TABLE]); | |
441 | ||
7eab60a7 RS |
442 | if (tb_encap[SEG6_LOCAL_VRFTABLE]) |
443 | ctx->table = | |
444 | *(uint32_t *)RTA_DATA(tb_encap[SEG6_LOCAL_VRFTABLE]); | |
445 | ||
d49e6c4a HS |
446 | return act; |
447 | } | |
448 | ||
f16de90b HS |
449 | static int parse_encap_seg6(struct rtattr *tb, struct in6_addr *segs) |
450 | { | |
1bda3e62 | 451 | struct rtattr *tb_encap[256] = {}; |
f16de90b HS |
452 | struct seg6_iptunnel_encap *ipt = NULL; |
453 | struct in6_addr *segments = NULL; | |
454 | ||
455 | netlink_parse_rtattr_nested(tb_encap, 256, tb); | |
456 | ||
457 | /* | |
458 | * TODO: It's not support multiple SID list. | |
459 | */ | |
460 | if (tb_encap[SEG6_IPTUNNEL_SRH]) { | |
461 | ipt = (struct seg6_iptunnel_encap *) | |
462 | RTA_DATA(tb_encap[SEG6_IPTUNNEL_SRH]); | |
463 | segments = ipt->srh[0].segments; | |
464 | *segs = segments[0]; | |
465 | return 1; | |
466 | } | |
467 | ||
468 | return 0; | |
469 | } | |
470 | ||
471 | ||
77a44d94 SW |
472 | static struct nexthop |
473 | parse_nexthop_unicast(ns_id_t ns_id, struct rtmsg *rtm, struct rtattr **tb, | |
474 | enum blackhole_type bh_type, int index, void *prefsrc, | |
20822f9d | 475 | void *gate, afi_t afi, vrf_id_t vrf_id) |
77a44d94 SW |
476 | { |
477 | struct interface *ifp = NULL; | |
478 | struct nexthop nh = {0}; | |
479 | mpls_label_t labels[MPLS_MAX_LABELS] = {0}; | |
480 | int num_labels = 0; | |
b9596f13 | 481 | enum seg6local_action_t seg6l_act = ZEBRA_SEG6_LOCAL_ACTION_UNSPEC; |
1bda3e62 HS |
482 | struct seg6local_context seg6l_ctx = {}; |
483 | struct in6_addr seg6_segs = {}; | |
f16de90b | 484 | int num_segs = 0; |
77a44d94 | 485 | |
20822f9d | 486 | vrf_id_t nh_vrf_id = vrf_id; |
77a44d94 SW |
487 | size_t sz = (afi == AFI_IP) ? 4 : 16; |
488 | ||
489 | if (bh_type == BLACKHOLE_UNSPEC) { | |
490 | if (index && !gate) | |
491 | nh.type = NEXTHOP_TYPE_IFINDEX; | |
492 | else if (index && gate) | |
493 | nh.type = (afi == AFI_IP) ? NEXTHOP_TYPE_IPV4_IFINDEX | |
494 | : NEXTHOP_TYPE_IPV6_IFINDEX; | |
495 | else if (!index && gate) | |
496 | nh.type = (afi == AFI_IP) ? NEXTHOP_TYPE_IPV4 | |
497 | : NEXTHOP_TYPE_IPV6; | |
498 | else { | |
499 | nh.type = NEXTHOP_TYPE_BLACKHOLE; | |
500 | nh.bh_type = bh_type; | |
501 | } | |
502 | } else { | |
503 | nh.type = NEXTHOP_TYPE_BLACKHOLE; | |
504 | nh.bh_type = bh_type; | |
505 | } | |
506 | nh.ifindex = index; | |
507 | if (prefsrc) | |
508 | memcpy(&nh.src, prefsrc, sz); | |
509 | if (gate) | |
510 | memcpy(&nh.gate, gate, sz); | |
511 | ||
512 | if (index) { | |
513 | ifp = if_lookup_by_index_per_ns(zebra_ns_lookup(ns_id), index); | |
514 | if (ifp) | |
096f7609 | 515 | nh_vrf_id = ifp->vrf->vrf_id; |
77a44d94 SW |
516 | } |
517 | nh.vrf_id = nh_vrf_id; | |
518 | ||
519 | if (tb[RTA_ENCAP] && tb[RTA_ENCAP_TYPE] | |
520 | && *(uint16_t *)RTA_DATA(tb[RTA_ENCAP_TYPE]) | |
521 | == LWTUNNEL_ENCAP_MPLS) { | |
522 | num_labels = parse_encap_mpls(tb[RTA_ENCAP], labels); | |
523 | } | |
d49e6c4a HS |
524 | if (tb[RTA_ENCAP] && tb[RTA_ENCAP_TYPE] |
525 | && *(uint16_t *)RTA_DATA(tb[RTA_ENCAP_TYPE]) | |
526 | == LWTUNNEL_ENCAP_SEG6_LOCAL) { | |
527 | seg6l_act = parse_encap_seg6local(tb[RTA_ENCAP], &seg6l_ctx); | |
528 | } | |
f16de90b HS |
529 | if (tb[RTA_ENCAP] && tb[RTA_ENCAP_TYPE] |
530 | && *(uint16_t *)RTA_DATA(tb[RTA_ENCAP_TYPE]) | |
531 | == LWTUNNEL_ENCAP_SEG6) { | |
532 | num_segs = parse_encap_seg6(tb[RTA_ENCAP], &seg6_segs); | |
533 | } | |
77a44d94 SW |
534 | |
535 | if (rtm->rtm_flags & RTNH_F_ONLINK) | |
536 | SET_FLAG(nh.flags, NEXTHOP_FLAG_ONLINK); | |
537 | ||
538 | if (num_labels) | |
539 | nexthop_add_labels(&nh, ZEBRA_LSP_STATIC, num_labels, labels); | |
540 | ||
d49e6c4a | 541 | if (seg6l_act != ZEBRA_SEG6_LOCAL_ACTION_UNSPEC) |
eab0f8f0 | 542 | nexthop_add_srv6_seg6local(&nh, seg6l_act, &seg6l_ctx); |
d49e6c4a | 543 | |
f16de90b | 544 | if (num_segs) |
eab0f8f0 | 545 | nexthop_add_srv6_seg6(&nh, &seg6_segs); |
f16de90b | 546 | |
77a44d94 SW |
547 | return nh; |
548 | } | |
549 | ||
20822f9d | 550 | static uint8_t parse_multipath_nexthops_unicast(ns_id_t ns_id, |
0eb97b86 | 551 | struct nexthop_group *ng, |
20822f9d SW |
552 | struct rtmsg *rtm, |
553 | struct rtnexthop *rtnh, | |
554 | struct rtattr **tb, | |
555 | void *prefsrc, vrf_id_t vrf_id) | |
556 | { | |
557 | void *gate = NULL; | |
558 | struct interface *ifp = NULL; | |
559 | int index = 0; | |
560 | /* MPLS labels */ | |
561 | mpls_label_t labels[MPLS_MAX_LABELS] = {0}; | |
562 | int num_labels = 0; | |
b9596f13 | 563 | enum seg6local_action_t seg6l_act = ZEBRA_SEG6_LOCAL_ACTION_UNSPEC; |
1bda3e62 HS |
564 | struct seg6local_context seg6l_ctx = {}; |
565 | struct in6_addr seg6_segs = {}; | |
f16de90b | 566 | int num_segs = 0; |
20822f9d SW |
567 | struct rtattr *rtnh_tb[RTA_MAX + 1] = {}; |
568 | ||
569 | int len = RTA_PAYLOAD(tb[RTA_MULTIPATH]); | |
570 | vrf_id_t nh_vrf_id = vrf_id; | |
571 | ||
20822f9d SW |
572 | for (;;) { |
573 | struct nexthop *nh = NULL; | |
574 | ||
575 | if (len < (int)sizeof(*rtnh) || rtnh->rtnh_len > len) | |
576 | break; | |
577 | ||
578 | index = rtnh->rtnh_ifindex; | |
579 | if (index) { | |
580 | /* | |
581 | * Yes we are looking this up | |
582 | * for every nexthop and just | |
583 | * using the last one looked | |
584 | * up right now | |
585 | */ | |
586 | ifp = if_lookup_by_index_per_ns(zebra_ns_lookup(ns_id), | |
587 | index); | |
588 | if (ifp) | |
096f7609 | 589 | nh_vrf_id = ifp->vrf->vrf_id; |
20822f9d SW |
590 | else { |
591 | flog_warn( | |
592 | EC_ZEBRA_UNKNOWN_INTERFACE, | |
593 | "%s: Unknown interface %u specified, defaulting to VRF_DEFAULT", | |
15569c58 | 594 | __func__, index); |
20822f9d SW |
595 | nh_vrf_id = VRF_DEFAULT; |
596 | } | |
597 | } else | |
598 | nh_vrf_id = vrf_id; | |
599 | ||
600 | if (rtnh->rtnh_len > sizeof(*rtnh)) { | |
20822f9d SW |
601 | netlink_parse_rtattr(rtnh_tb, RTA_MAX, RTNH_DATA(rtnh), |
602 | rtnh->rtnh_len - sizeof(*rtnh)); | |
603 | if (rtnh_tb[RTA_GATEWAY]) | |
604 | gate = RTA_DATA(rtnh_tb[RTA_GATEWAY]); | |
605 | if (rtnh_tb[RTA_ENCAP] && rtnh_tb[RTA_ENCAP_TYPE] | |
606 | && *(uint16_t *)RTA_DATA(rtnh_tb[RTA_ENCAP_TYPE]) | |
607 | == LWTUNNEL_ENCAP_MPLS) { | |
608 | num_labels = parse_encap_mpls( | |
609 | rtnh_tb[RTA_ENCAP], labels); | |
610 | } | |
d49e6c4a HS |
611 | if (rtnh_tb[RTA_ENCAP] && rtnh_tb[RTA_ENCAP_TYPE] |
612 | && *(uint16_t *)RTA_DATA(rtnh_tb[RTA_ENCAP_TYPE]) | |
613 | == LWTUNNEL_ENCAP_SEG6_LOCAL) { | |
614 | seg6l_act = parse_encap_seg6local( | |
615 | rtnh_tb[RTA_ENCAP], &seg6l_ctx); | |
616 | } | |
f16de90b HS |
617 | if (rtnh_tb[RTA_ENCAP] && rtnh_tb[RTA_ENCAP_TYPE] |
618 | && *(uint16_t *)RTA_DATA(rtnh_tb[RTA_ENCAP_TYPE]) | |
619 | == LWTUNNEL_ENCAP_SEG6) { | |
620 | num_segs = parse_encap_seg6(rtnh_tb[RTA_ENCAP], | |
621 | &seg6_segs); | |
622 | } | |
20822f9d SW |
623 | } |
624 | ||
f3354e16 SW |
625 | if (gate && rtm->rtm_family == AF_INET) { |
626 | if (index) | |
0eb97b86 MS |
627 | nh = nexthop_from_ipv4_ifindex( |
628 | gate, prefsrc, index, nh_vrf_id); | |
f3354e16 | 629 | else |
0eb97b86 MS |
630 | nh = nexthop_from_ipv4(gate, prefsrc, |
631 | nh_vrf_id); | |
f3354e16 SW |
632 | } else if (gate && rtm->rtm_family == AF_INET6) { |
633 | if (index) | |
0eb97b86 MS |
634 | nh = nexthop_from_ipv6_ifindex( |
635 | gate, index, nh_vrf_id); | |
f3354e16 | 636 | else |
0eb97b86 | 637 | nh = nexthop_from_ipv6(gate, nh_vrf_id); |
20822f9d | 638 | } else |
0eb97b86 | 639 | nh = nexthop_from_ifindex(index, nh_vrf_id); |
20822f9d SW |
640 | |
641 | if (nh) { | |
df7fb580 DS |
642 | nh->weight = rtnh->rtnh_hops + 1; |
643 | ||
20822f9d SW |
644 | if (num_labels) |
645 | nexthop_add_labels(nh, ZEBRA_LSP_STATIC, | |
646 | num_labels, labels); | |
647 | ||
d49e6c4a | 648 | if (seg6l_act != ZEBRA_SEG6_LOCAL_ACTION_UNSPEC) |
eab0f8f0 HS |
649 | nexthop_add_srv6_seg6local(nh, seg6l_act, |
650 | &seg6l_ctx); | |
d49e6c4a | 651 | |
f16de90b | 652 | if (num_segs) |
eab0f8f0 | 653 | nexthop_add_srv6_seg6(nh, &seg6_segs); |
f16de90b | 654 | |
20822f9d SW |
655 | if (rtnh->rtnh_flags & RTNH_F_ONLINK) |
656 | SET_FLAG(nh->flags, NEXTHOP_FLAG_ONLINK); | |
0eb97b86 MS |
657 | |
658 | /* Add to temporary list */ | |
659 | nexthop_group_add_sorted(ng, nh); | |
20822f9d SW |
660 | } |
661 | ||
662 | if (rtnh->rtnh_len == 0) | |
663 | break; | |
664 | ||
665 | len -= NLMSG_ALIGN(rtnh->rtnh_len); | |
666 | rtnh = RTNH_NEXT(rtnh); | |
667 | } | |
668 | ||
0eb97b86 | 669 | uint8_t nhop_num = nexthop_group_nexthop_num(ng); |
20822f9d SW |
670 | |
671 | return nhop_num; | |
672 | } | |
673 | ||
718e3744 | 674 | /* Looking up routing table by netlink interface. */ |
2414abd3 | 675 | static int netlink_route_change_read_unicast(struct nlmsghdr *h, ns_id_t ns_id, |
d62a17ae | 676 | int startup) |
718e3744 | 677 | { |
d62a17ae | 678 | int len; |
679 | struct rtmsg *rtm; | |
680 | struct rtattr *tb[RTA_MAX + 1]; | |
acde7f6b | 681 | uint32_t flags = 0; |
d62a17ae | 682 | struct prefix p; |
792fa92e | 683 | struct prefix_ipv6 src_p = {}; |
78dd30b2 | 684 | vrf_id_t vrf_id; |
6a6d11a3 | 685 | bool selfroute; |
d62a17ae | 686 | |
687 | char anyaddr[16] = {0}; | |
688 | ||
915902cb | 689 | int proto = ZEBRA_ROUTE_KERNEL; |
d62a17ae | 690 | int index = 0; |
691 | int table; | |
692 | int metric = 0; | |
d7c0a89a | 693 | uint32_t mtu = 0; |
25715c7e | 694 | uint8_t distance = 0; |
4e40b6d6 | 695 | route_tag_t tag = 0; |
fcc89a9c | 696 | uint32_t nhe_id = 0; |
d62a17ae | 697 | |
698 | void *dest = NULL; | |
699 | void *gate = NULL; | |
700 | void *prefsrc = NULL; /* IPv4 preferred source host address */ | |
701 | void *src = NULL; /* IPv6 srcdest source prefix */ | |
e655a03c | 702 | enum blackhole_type bh_type = BLACKHOLE_UNSPEC; |
d62a17ae | 703 | |
3cee2135 DS |
704 | frrtrace(3, frr_zebra, netlink_route_change_read_unicast, h, ns_id, |
705 | startup); | |
706 | ||
d62a17ae | 707 | rtm = NLMSG_DATA(h); |
708 | ||
709 | if (startup && h->nlmsg_type != RTM_NEWROUTE) | |
710 | return 0; | |
e655a03c DL |
711 | switch (rtm->rtm_type) { |
712 | case RTN_UNICAST: | |
713 | break; | |
714 | case RTN_BLACKHOLE: | |
715 | bh_type = BLACKHOLE_NULL; | |
716 | break; | |
717 | case RTN_UNREACHABLE: | |
718 | bh_type = BLACKHOLE_REJECT; | |
719 | break; | |
720 | case RTN_PROHIBIT: | |
721 | bh_type = BLACKHOLE_ADMINPROHIB; | |
722 | break; | |
723 | default: | |
8c8f250b DS |
724 | if (IS_ZEBRA_DEBUG_KERNEL) |
725 | zlog_debug("Route rtm_type: %s(%d) intentionally ignoring", | |
726 | nl_rttype_to_str(rtm->rtm_type), | |
727 | rtm->rtm_type); | |
d62a17ae | 728 | return 0; |
e655a03c | 729 | } |
d62a17ae | 730 | |
731 | len = h->nlmsg_len - NLMSG_LENGTH(sizeof(struct rtmsg)); | |
9bdf8618 | 732 | if (len < 0) { |
15569c58 DA |
733 | zlog_err( |
734 | "%s: Message received from netlink is of a broken size %d %zu", | |
735 | __func__, h->nlmsg_len, | |
736 | (size_t)NLMSG_LENGTH(sizeof(struct rtmsg))); | |
d62a17ae | 737 | return -1; |
9bdf8618 | 738 | } |
d62a17ae | 739 | |
d62a17ae | 740 | netlink_parse_rtattr(tb, RTA_MAX, RTM_RTA(rtm), len); |
741 | ||
742 | if (rtm->rtm_flags & RTM_F_CLONED) | |
743 | return 0; | |
744 | if (rtm->rtm_protocol == RTPROT_REDIRECT) | |
745 | return 0; | |
746 | if (rtm->rtm_protocol == RTPROT_KERNEL) | |
747 | return 0; | |
748 | ||
6a6d11a3 NN |
749 | selfroute = is_selfroute(rtm->rtm_protocol); |
750 | ||
e4876266 DS |
751 | if (!startup && selfroute |
752 | && h->nlmsg_type == RTM_NEWROUTE | |
753 | && !zrouter.asic_offloaded) { | |
6ab5222f DS |
754 | if (IS_ZEBRA_DEBUG_KERNEL) |
755 | zlog_debug("Route type: %d Received that we think we have originated, ignoring", | |
756 | rtm->rtm_protocol); | |
d62a17ae | 757 | return 0; |
6ab5222f | 758 | } |
d62a17ae | 759 | |
760 | /* We don't care about change notifications for the MPLS table. */ | |
761 | /* TODO: Revisit this. */ | |
762 | if (rtm->rtm_family == AF_MPLS) | |
763 | return 0; | |
764 | ||
765 | /* Table corresponding to route. */ | |
766 | if (tb[RTA_TABLE]) | |
767 | table = *(int *)RTA_DATA(tb[RTA_TABLE]); | |
768 | else | |
769 | table = rtm->rtm_table; | |
770 | ||
771 | /* Map to VRF */ | |
78dd30b2 | 772 | vrf_id = vrf_lookup_by_table(table, ns_id); |
d62a17ae | 773 | if (vrf_id == VRF_DEFAULT) { |
774 | if (!is_zebra_valid_kernel_table(table) | |
775 | && !is_zebra_main_routing_table(table)) | |
776 | return 0; | |
777 | } | |
778 | ||
5a3cf853 DS |
779 | if (rtm->rtm_flags & RTM_F_TRAP) |
780 | flags |= ZEBRA_FLAG_TRAPPED; | |
781 | if (rtm->rtm_flags & RTM_F_OFFLOAD) | |
782 | flags |= ZEBRA_FLAG_OFFLOADED; | |
0d32fbee DS |
783 | if (rtm->rtm_flags & RTM_F_OFFLOAD_FAILED) |
784 | flags |= ZEBRA_FLAG_OFFLOAD_FAILED; | |
5a3cf853 | 785 | |
d62a17ae | 786 | /* Route which inserted by Zebra. */ |
6a6d11a3 | 787 | if (selfroute) { |
d62a17ae | 788 | flags |= ZEBRA_FLAG_SELFROUTE; |
38e40db1 | 789 | proto = proto2zebra(rtm->rtm_protocol, rtm->rtm_family, false); |
915902cb | 790 | } |
d62a17ae | 791 | if (tb[RTA_OIF]) |
792 | index = *(int *)RTA_DATA(tb[RTA_OIF]); | |
793 | ||
794 | if (tb[RTA_DST]) | |
795 | dest = RTA_DATA(tb[RTA_DST]); | |
796 | else | |
797 | dest = anyaddr; | |
798 | ||
799 | if (tb[RTA_SRC]) | |
800 | src = RTA_DATA(tb[RTA_SRC]); | |
801 | else | |
802 | src = anyaddr; | |
803 | ||
804 | if (tb[RTA_PREFSRC]) | |
805 | prefsrc = RTA_DATA(tb[RTA_PREFSRC]); | |
806 | ||
807 | if (tb[RTA_GATEWAY]) | |
808 | gate = RTA_DATA(tb[RTA_GATEWAY]); | |
809 | ||
fcc89a9c SW |
810 | if (tb[RTA_NH_ID]) |
811 | nhe_id = *(uint32_t *)RTA_DATA(tb[RTA_NH_ID]); | |
812 | ||
f19435a8 DS |
813 | if (tb[RTA_PRIORITY]) |
814 | metric = *(int *)RTA_DATA(tb[RTA_PRIORITY]); | |
d62a17ae | 815 | |
4e40b6d6 KK |
816 | #if defined(SUPPORT_REALMS) |
817 | if (tb[RTA_FLOW]) | |
818 | tag = *(uint32_t *)RTA_DATA(tb[RTA_FLOW]); | |
819 | #endif | |
820 | ||
f19435a8 DS |
821 | if (tb[RTA_METRICS]) { |
822 | struct rtattr *mxrta[RTAX_MAX + 1]; | |
d62a17ae | 823 | |
996c9314 | 824 | netlink_parse_rtattr(mxrta, RTAX_MAX, RTA_DATA(tb[RTA_METRICS]), |
f19435a8 | 825 | RTA_PAYLOAD(tb[RTA_METRICS])); |
d62a17ae | 826 | |
f19435a8 | 827 | if (mxrta[RTAX_MTU]) |
d7c0a89a | 828 | mtu = *(uint32_t *)RTA_DATA(mxrta[RTAX_MTU]); |
d62a17ae | 829 | } |
830 | ||
831 | if (rtm->rtm_family == AF_INET) { | |
832 | p.family = AF_INET; | |
930571d2 | 833 | if (rtm->rtm_dst_len > IPV4_MAX_BITLEN) { |
e17d9b2d | 834 | zlog_err( |
75829703 | 835 | "Invalid destination prefix length: %u received from kernel route change", |
930571d2 | 836 | rtm->rtm_dst_len); |
e17d9b2d | 837 | return -1; |
930571d2 | 838 | } |
d62a17ae | 839 | memcpy(&p.u.prefix4, dest, 4); |
840 | p.prefixlen = rtm->rtm_dst_len; | |
841 | ||
1f610a1f | 842 | if (rtm->rtm_src_len != 0) { |
9df414fe | 843 | flog_warn( |
e914ccbe | 844 | EC_ZEBRA_UNSUPPORTED_V4_SRCDEST, |
2dbe669b DA |
845 | "unsupported IPv4 sourcedest route (dest %pFX vrf %u)", |
846 | &p, vrf_id); | |
1f610a1f CF |
847 | return 0; |
848 | } | |
930571d2 | 849 | |
1f610a1f CF |
850 | /* Force debug below to not display anything for source */ |
851 | src_p.prefixlen = 0; | |
d62a17ae | 852 | } else if (rtm->rtm_family == AF_INET6) { |
853 | p.family = AF_INET6; | |
930571d2 | 854 | if (rtm->rtm_dst_len > IPV6_MAX_BITLEN) { |
e17d9b2d | 855 | zlog_err( |
75829703 | 856 | "Invalid destination prefix length: %u received from kernel route change", |
930571d2 | 857 | rtm->rtm_dst_len); |
e17d9b2d | 858 | return -1; |
930571d2 | 859 | } |
d62a17ae | 860 | memcpy(&p.u.prefix6, dest, 16); |
861 | p.prefixlen = rtm->rtm_dst_len; | |
862 | ||
863 | src_p.family = AF_INET6; | |
930571d2 | 864 | if (rtm->rtm_src_len > IPV6_MAX_BITLEN) { |
e17d9b2d | 865 | zlog_err( |
75829703 | 866 | "Invalid source prefix length: %u received from kernel route change", |
930571d2 | 867 | rtm->rtm_src_len); |
e17d9b2d | 868 | return -1; |
930571d2 | 869 | } |
d62a17ae | 870 | memcpy(&src_p.prefix, src, 16); |
871 | src_p.prefixlen = rtm->rtm_src_len; | |
deb28338 MS |
872 | } else { |
873 | /* We only handle the AFs we handle... */ | |
874 | if (IS_ZEBRA_DEBUG_KERNEL) | |
875 | zlog_debug("%s: unknown address-family %u", __func__, | |
876 | rtm->rtm_family); | |
877 | return 0; | |
d62a17ae | 878 | } |
879 | ||
25715c7e DS |
880 | /* |
881 | * For ZEBRA_ROUTE_KERNEL types: | |
882 | * | |
883 | * The metric/priority of the route received from the kernel | |
884 | * is a 32 bit number. We are going to interpret the high | |
885 | * order byte as the Admin Distance and the low order 3 bytes | |
886 | * as the metric. | |
887 | * | |
888 | * This will allow us to do two things: | |
889 | * 1) Allow the creation of kernel routes that can be | |
890 | * overridden by zebra. | |
891 | * 2) Allow the old behavior for 'most' kernel route types | |
892 | * if a user enters 'ip route ...' v4 routes get a metric | |
893 | * of 0 and v6 routes get a metric of 1024. Both of these | |
894 | * values will end up with a admin distance of 0, which | |
895 | * will cause them to win for the purposes of zebra. | |
896 | */ | |
897 | if (proto == ZEBRA_ROUTE_KERNEL) { | |
898 | distance = (metric >> 24) & 0xFF; | |
996c9314 | 899 | metric = (metric & 0x00FFFFFF); |
25715c7e DS |
900 | } |
901 | ||
d62a17ae | 902 | if (IS_ZEBRA_DEBUG_KERNEL) { |
d62a17ae | 903 | char buf2[PREFIX_STRLEN]; |
2dbe669b | 904 | |
bd47f3a3 | 905 | zlog_debug( |
2dbe669b DA |
906 | "%s %pFX%s%s vrf %s(%u) table_id: %u metric: %d Admin Distance: %d", |
907 | nl_msg_type_to_str(h->nlmsg_type), &p, | |
bd47f3a3 JU |
908 | src_p.prefixlen ? " from " : "", |
909 | src_p.prefixlen ? prefix2str(&src_p, buf2, sizeof(buf2)) | |
910 | : "", | |
911 | vrf_id_to_name(vrf_id), vrf_id, table, metric, | |
912 | distance); | |
d62a17ae | 913 | } |
914 | ||
915 | afi_t afi = AFI_IP; | |
916 | if (rtm->rtm_family == AF_INET6) | |
917 | afi = AFI_IP6; | |
918 | ||
919 | if (h->nlmsg_type == RTM_NEWROUTE) { | |
8795f904 | 920 | |
fd36be7e | 921 | if (!tb[RTA_MULTIPATH]) { |
77a44d94 | 922 | struct nexthop nh = {0}; |
8795f904 | 923 | |
77a44d94 SW |
924 | if (!nhe_id) { |
925 | nh = parse_nexthop_unicast( | |
926 | ns_id, rtm, tb, bh_type, index, prefsrc, | |
20822f9d | 927 | gate, afi, vrf_id); |
87da6a60 | 928 | } |
4a7371e9 | 929 | rib_add(afi, SAFI_UNICAST, vrf_id, proto, 0, flags, &p, |
8032b717 | 930 | &src_p, &nh, nhe_id, table, metric, mtu, |
c6eee91f | 931 | distance, tag, startup); |
fd36be7e | 932 | } else { |
d62a17ae | 933 | /* This is a multipath route */ |
d62a17ae | 934 | struct route_entry *re; |
0eb97b86 | 935 | struct nexthop_group *ng = NULL; |
d62a17ae | 936 | struct rtnexthop *rtnh = |
937 | (struct rtnexthop *)RTA_DATA(tb[RTA_MULTIPATH]); | |
d62a17ae | 938 | |
939 | re = XCALLOC(MTYPE_RE, sizeof(struct route_entry)); | |
915902cb | 940 | re->type = proto; |
25715c7e | 941 | re->distance = distance; |
d62a17ae | 942 | re->flags = flags; |
943 | re->metric = metric; | |
944 | re->mtu = mtu; | |
945 | re->vrf_id = vrf_id; | |
946 | re->table = table; | |
98572489 | 947 | re->uptime = monotime(NULL); |
4e40b6d6 | 948 | re->tag = tag; |
bbb322f2 | 949 | re->nhe_id = nhe_id; |
3c04071d | 950 | |
20822f9d | 951 | if (!nhe_id) { |
0eb97b86 MS |
952 | uint8_t nhop_num; |
953 | ||
954 | /* Use temporary list of nexthops; parse | |
955 | * message payload's nexthops. | |
956 | */ | |
957 | ng = nexthop_group_new(); | |
958 | nhop_num = | |
20822f9d | 959 | parse_multipath_nexthops_unicast( |
0eb97b86 | 960 | ns_id, ng, rtm, rtnh, tb, |
20822f9d SW |
961 | prefsrc, vrf_id); |
962 | ||
963 | zserv_nexthop_num_warn( | |
964 | __func__, (const struct prefix *)&p, | |
965 | nhop_num); | |
0eb97b86 MS |
966 | |
967 | if (nhop_num == 0) { | |
968 | nexthop_group_delete(&ng); | |
969 | ng = NULL; | |
970 | } | |
d62a17ae | 971 | } |
972 | ||
0eb97b86 | 973 | if (nhe_id || ng) |
1f610a1f | 974 | rib_add_multipath(afi, SAFI_UNICAST, &p, |
c6eee91f | 975 | &src_p, re, ng, startup); |
20822f9d SW |
976 | else |
977 | XFREE(MTYPE_RE, re); | |
d62a17ae | 978 | } |
979 | } else { | |
bc541126 SW |
980 | if (nhe_id) { |
981 | rib_delete(afi, SAFI_UNICAST, vrf_id, proto, 0, flags, | |
982 | &p, &src_p, NULL, nhe_id, table, metric, | |
3ceae22b | 983 | distance, true); |
bc541126 SW |
984 | } else { |
985 | if (!tb[RTA_MULTIPATH]) { | |
986 | struct nexthop nh; | |
760f39dc HS |
987 | |
988 | nh = parse_nexthop_unicast( | |
989 | ns_id, rtm, tb, bh_type, index, prefsrc, | |
990 | gate, afi, vrf_id); | |
bc541126 SW |
991 | rib_delete(afi, SAFI_UNICAST, vrf_id, proto, 0, |
992 | flags, &p, &src_p, &nh, 0, table, | |
3ceae22b | 993 | metric, distance, true); |
8ba5bd58 | 994 | } else { |
bc541126 SW |
995 | /* XXX: need to compare the entire list of |
996 | * nexthops here for NLM_F_APPEND stupidity */ | |
997 | rib_delete(afi, SAFI_UNICAST, vrf_id, proto, 0, | |
998 | flags, &p, &src_p, NULL, 0, table, | |
3ceae22b | 999 | metric, distance, true); |
8ba5bd58 | 1000 | } |
d62a17ae | 1001 | } |
1002 | } | |
1003 | ||
1004 | return 0; | |
718e3744 | 1005 | } |
1006 | ||
e3be0432 DS |
1007 | static struct mcast_route_data *mroute = NULL; |
1008 | ||
2414abd3 | 1009 | static int netlink_route_change_read_multicast(struct nlmsghdr *h, |
d62a17ae | 1010 | ns_id_t ns_id, int startup) |
565fdc75 | 1011 | { |
d62a17ae | 1012 | int len; |
1013 | struct rtmsg *rtm; | |
1014 | struct rtattr *tb[RTA_MAX + 1]; | |
1015 | struct mcast_route_data *m; | |
1016 | struct mcast_route_data mr; | |
1017 | int iif = 0; | |
1018 | int count; | |
1019 | int oif[256]; | |
1020 | int oif_count = 0; | |
d62a17ae | 1021 | char oif_list[256] = "\0"; |
78dd30b2 | 1022 | vrf_id_t vrf; |
43b5cc5e | 1023 | int table; |
d62a17ae | 1024 | |
1025 | if (mroute) | |
1026 | m = mroute; | |
1027 | else { | |
1028 | memset(&mr, 0, sizeof(mr)); | |
1029 | m = &mr; | |
1030 | } | |
1031 | ||
1032 | rtm = NLMSG_DATA(h); | |
1033 | ||
1034 | len = h->nlmsg_len - NLMSG_LENGTH(sizeof(struct rtmsg)); | |
1035 | ||
d62a17ae | 1036 | netlink_parse_rtattr(tb, RTA_MAX, RTM_RTA(rtm), len); |
90d82769 | 1037 | |
43b5cc5e DS |
1038 | if (tb[RTA_TABLE]) |
1039 | table = *(int *)RTA_DATA(tb[RTA_TABLE]); | |
1040 | else | |
1041 | table = rtm->rtm_table; | |
1042 | ||
78dd30b2 | 1043 | vrf = vrf_lookup_by_table(table, ns_id); |
43b5cc5e | 1044 | |
d62a17ae | 1045 | if (tb[RTA_IIF]) |
1046 | iif = *(int *)RTA_DATA(tb[RTA_IIF]); | |
1047 | ||
4d3b4b18 MR |
1048 | if (tb[RTA_SRC]) { |
1049 | if (rtm->rtm_family == RTNL_FAMILY_IPMR) | |
1050 | m->src.ipaddr_v4 = | |
1051 | *(struct in_addr *)RTA_DATA(tb[RTA_SRC]); | |
1052 | else | |
1053 | m->src.ipaddr_v6 = | |
1054 | *(struct in6_addr *)RTA_DATA(tb[RTA_SRC]); | |
1055 | } | |
d62a17ae | 1056 | |
4d3b4b18 MR |
1057 | if (tb[RTA_DST]) { |
1058 | if (rtm->rtm_family == RTNL_FAMILY_IPMR) | |
1059 | m->grp.ipaddr_v4 = | |
1060 | *(struct in_addr *)RTA_DATA(tb[RTA_DST]); | |
1061 | else | |
1062 | m->grp.ipaddr_v6 = | |
1063 | *(struct in6_addr *)RTA_DATA(tb[RTA_DST]); | |
1064 | } | |
d62a17ae | 1065 | |
62819462 | 1066 | if (tb[RTA_EXPIRES]) |
d62a17ae | 1067 | m->lastused = *(unsigned long long *)RTA_DATA(tb[RTA_EXPIRES]); |
1068 | ||
1069 | if (tb[RTA_MULTIPATH]) { | |
1070 | struct rtnexthop *rtnh = | |
1071 | (struct rtnexthop *)RTA_DATA(tb[RTA_MULTIPATH]); | |
1072 | ||
1073 | len = RTA_PAYLOAD(tb[RTA_MULTIPATH]); | |
1074 | for (;;) { | |
1075 | if (len < (int)sizeof(*rtnh) || rtnh->rtnh_len > len) | |
1076 | break; | |
1077 | ||
1078 | oif[oif_count] = rtnh->rtnh_ifindex; | |
1079 | oif_count++; | |
1080 | ||
3c04071d SW |
1081 | if (rtnh->rtnh_len == 0) |
1082 | break; | |
1083 | ||
d62a17ae | 1084 | len -= NLMSG_ALIGN(rtnh->rtnh_len); |
1085 | rtnh = RTNH_NEXT(rtnh); | |
1086 | } | |
1087 | } | |
1088 | ||
4d3b4b18 MR |
1089 | if (rtm->rtm_family == RTNL_FAMILY_IPMR) { |
1090 | SET_IPADDR_V4(&m->src); | |
1091 | SET_IPADDR_V4(&m->grp); | |
1092 | } else if (rtm->rtm_family == RTNL_FAMILY_IP6MR) { | |
1093 | SET_IPADDR_V6(&m->src); | |
1094 | SET_IPADDR_V6(&m->grp); | |
1095 | } else { | |
1096 | zlog_warn("%s: Invalid rtm_family received", __func__); | |
1097 | return 0; | |
1098 | } | |
1099 | ||
d62a17ae | 1100 | if (IS_ZEBRA_DEBUG_KERNEL) { |
822c9af2 SW |
1101 | struct interface *ifp = NULL; |
1102 | struct zebra_vrf *zvrf = NULL; | |
1103 | ||
d62a17ae | 1104 | for (count = 0; count < oif_count; count++) { |
1105 | ifp = if_lookup_by_index(oif[count], vrf); | |
1106 | char temp[256]; | |
1107 | ||
772270f3 QY |
1108 | snprintf(temp, sizeof(temp), "%s(%d) ", |
1109 | ifp ? ifp->name : "Unknown", oif[count]); | |
eab4a5c2 | 1110 | strlcat(oif_list, temp, sizeof(oif_list)); |
d62a17ae | 1111 | } |
822c9af2 | 1112 | zvrf = zebra_vrf_lookup_by_id(vrf); |
d62a17ae | 1113 | ifp = if_lookup_by_index(iif, vrf); |
822c9af2 | 1114 | zlog_debug( |
4d3b4b18 | 1115 | "MCAST VRF: %s(%d) %s (%pIA,%pIA) IIF: %s(%d) OIF: %s jiffies: %lld", |
bd47f3a3 | 1116 | zvrf_name(zvrf), vrf, nl_msg_type_to_str(h->nlmsg_type), |
4d3b4b18 MR |
1117 | &m->src, &m->grp, ifp ? ifp->name : "Unknown", iif, |
1118 | oif_list, m->lastused); | |
90d82769 | 1119 | } |
d62a17ae | 1120 | return 0; |
565fdc75 DS |
1121 | } |
1122 | ||
2414abd3 | 1123 | int netlink_route_change(struct nlmsghdr *h, ns_id_t ns_id, int startup) |
565fdc75 | 1124 | { |
d62a17ae | 1125 | int len; |
d62a17ae | 1126 | struct rtmsg *rtm; |
1127 | ||
1128 | rtm = NLMSG_DATA(h); | |
1129 | ||
1130 | if (!(h->nlmsg_type == RTM_NEWROUTE || h->nlmsg_type == RTM_DELROUTE)) { | |
1131 | /* If this is not route add/delete message print warning. */ | |
9165c5f5 | 1132 | zlog_debug("Kernel message: %s NS %u", |
87b5d1b0 | 1133 | nl_msg_type_to_str(h->nlmsg_type), ns_id); |
d62a17ae | 1134 | return 0; |
1135 | } | |
1136 | ||
c25e2f1a DS |
1137 | if (!(rtm->rtm_family == AF_INET || |
1138 | rtm->rtm_family == AF_INET6 || | |
1139 | rtm->rtm_family == RTNL_FAMILY_IPMR )) { | |
9df414fe | 1140 | flog_warn( |
e914ccbe | 1141 | EC_ZEBRA_UNKNOWN_FAMILY, |
87b5d1b0 DS |
1142 | "Invalid address family: %u received from kernel route change: %s", |
1143 | rtm->rtm_family, nl_msg_type_to_str(h->nlmsg_type)); | |
8a1b681c SW |
1144 | return 0; |
1145 | } | |
1146 | ||
d62a17ae | 1147 | /* Connected route. */ |
1148 | if (IS_ZEBRA_DEBUG_KERNEL) | |
78dd30b2 | 1149 | zlog_debug("%s %s %s proto %s NS %u", |
d62a17ae | 1150 | nl_msg_type_to_str(h->nlmsg_type), |
1151 | nl_family_to_str(rtm->rtm_family), | |
1152 | nl_rttype_to_str(rtm->rtm_type), | |
78dd30b2 | 1153 | nl_rtproto_to_str(rtm->rtm_protocol), ns_id); |
d62a17ae | 1154 | |
d62a17ae | 1155 | |
1156 | len = h->nlmsg_len - NLMSG_LENGTH(sizeof(struct rtmsg)); | |
9bdf8618 | 1157 | if (len < 0) { |
15569c58 DA |
1158 | zlog_err( |
1159 | "%s: Message received from netlink is of a broken size: %d %zu", | |
1160 | __func__, h->nlmsg_len, | |
1161 | (size_t)NLMSG_LENGTH(sizeof(struct rtmsg))); | |
d62a17ae | 1162 | return -1; |
9bdf8618 | 1163 | } |
d62a17ae | 1164 | |
e655a03c | 1165 | if (rtm->rtm_type == RTN_MULTICAST) |
2414abd3 | 1166 | netlink_route_change_read_multicast(h, ns_id, startup); |
e655a03c | 1167 | else |
2414abd3 | 1168 | netlink_route_change_read_unicast(h, ns_id, startup); |
d62a17ae | 1169 | return 0; |
565fdc75 DS |
1170 | } |
1171 | ||
289602d7 | 1172 | /* Request for specific route information from the kernel */ |
d62a17ae | 1173 | static int netlink_request_route(struct zebra_ns *zns, int family, int type) |
289602d7 | 1174 | { |
d62a17ae | 1175 | struct { |
1176 | struct nlmsghdr n; | |
1177 | struct rtmsg rtm; | |
1178 | } req; | |
1179 | ||
1180 | /* Form the request, specifying filter (rtattr) if needed. */ | |
1181 | memset(&req, 0, sizeof(req)); | |
1182 | req.n.nlmsg_type = type; | |
718f9b0f | 1183 | req.n.nlmsg_flags = NLM_F_ROOT | NLM_F_MATCH | NLM_F_REQUEST; |
d62a17ae | 1184 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)); |
1185 | req.rtm.rtm_family = family; | |
1186 | ||
fd3f8e52 | 1187 | return netlink_request(&zns->netlink_cmd, &req); |
289602d7 | 1188 | } |
1189 | ||
718e3744 | 1190 | /* Routing table read function using netlink interface. Only called |
1191 | bootstrap time. */ | |
d62a17ae | 1192 | int netlink_route_read(struct zebra_ns *zns) |
718e3744 | 1193 | { |
d62a17ae | 1194 | int ret; |
85a75f1e MS |
1195 | struct zebra_dplane_info dp_info; |
1196 | ||
1197 | zebra_dplane_info_from_zns(&dp_info, zns, true /*is_cmd*/); | |
d62a17ae | 1198 | |
1199 | /* Get IPv4 routing table. */ | |
1200 | ret = netlink_request_route(zns, AF_INET, RTM_GETROUTE); | |
1201 | if (ret < 0) | |
1202 | return ret; | |
1203 | ret = netlink_parse_info(netlink_route_change_read_unicast, | |
9bfadae8 | 1204 | &zns->netlink_cmd, &dp_info, 0, true); |
d62a17ae | 1205 | if (ret < 0) |
1206 | return ret; | |
1207 | ||
1208 | /* Get IPv6 routing table. */ | |
1209 | ret = netlink_request_route(zns, AF_INET6, RTM_GETROUTE); | |
1210 | if (ret < 0) | |
1211 | return ret; | |
1212 | ret = netlink_parse_info(netlink_route_change_read_unicast, | |
9bfadae8 | 1213 | &zns->netlink_cmd, &dp_info, 0, true); |
d62a17ae | 1214 | if (ret < 0) |
1215 | return ret; | |
1216 | ||
1217 | return 0; | |
718e3744 | 1218 | } |
1219 | ||
0be6e7d7 JU |
1220 | /* |
1221 | * The function returns true if the gateway info could be added | |
1222 | * to the message, otherwise false is returned. | |
1223 | */ | |
1224 | static bool _netlink_route_add_gateway_info(uint8_t route_family, | |
312a6bee JU |
1225 | uint8_t gw_family, |
1226 | struct nlmsghdr *nlmsg, | |
1227 | size_t req_size, int bytelen, | |
1228 | const struct nexthop *nexthop) | |
40c7bdb0 | 1229 | { |
d62a17ae | 1230 | if (route_family == AF_MPLS) { |
1231 | struct gw_family_t gw_fam; | |
1232 | ||
1233 | gw_fam.family = gw_family; | |
1234 | if (gw_family == AF_INET) | |
1235 | memcpy(&gw_fam.gate.ipv4, &nexthop->gate.ipv4, bytelen); | |
1236 | else | |
1237 | memcpy(&gw_fam.gate.ipv6, &nexthop->gate.ipv6, bytelen); | |
0be6e7d7 JU |
1238 | if (!nl_attr_put(nlmsg, req_size, RTA_VIA, &gw_fam.family, |
1239 | bytelen + 2)) | |
1240 | return false; | |
d62a17ae | 1241 | } else { |
92d6f769 K |
1242 | if (!(nexthop->rparent |
1243 | && IS_MAPPED_IPV6(&nexthop->rparent->gate.ipv6))) { | |
1244 | if (gw_family == AF_INET) { | |
1245 | if (!nl_attr_put(nlmsg, req_size, RTA_GATEWAY, | |
1246 | &nexthop->gate.ipv4, bytelen)) | |
1247 | return false; | |
1248 | } else { | |
1249 | if (!nl_attr_put(nlmsg, req_size, RTA_GATEWAY, | |
1250 | &nexthop->gate.ipv6, bytelen)) | |
1251 | return false; | |
1252 | } | |
0be6e7d7 | 1253 | } |
d62a17ae | 1254 | } |
0be6e7d7 JU |
1255 | |
1256 | return true; | |
40c7bdb0 | 1257 | } |
1258 | ||
b7537db6 SW |
1259 | static int build_label_stack(struct mpls_label_stack *nh_label, |
1260 | mpls_lse_t *out_lse, char *label_buf, | |
1261 | size_t label_buf_size) | |
1262 | { | |
1263 | char label_buf1[20]; | |
1264 | int num_labels = 0; | |
1265 | ||
1266 | for (int i = 0; nh_label && i < nh_label->num_labels; i++) { | |
1267 | if (nh_label->label[i] == MPLS_LABEL_IMPLICIT_NULL) | |
1268 | continue; | |
1269 | ||
1270 | if (IS_ZEBRA_DEBUG_KERNEL) { | |
1271 | if (!num_labels) | |
7533cad7 QY |
1272 | snprintf(label_buf, label_buf_size, "label %u", |
1273 | nh_label->label[i]); | |
b7537db6 | 1274 | else { |
772270f3 QY |
1275 | snprintf(label_buf1, sizeof(label_buf1), "/%u", |
1276 | nh_label->label[i]); | |
b7537db6 SW |
1277 | strlcat(label_buf, label_buf1, label_buf_size); |
1278 | } | |
1279 | } | |
1280 | ||
1281 | out_lse[num_labels] = | |
1282 | mpls_lse_encode(nh_label->label[i], 0, 0, 0); | |
1283 | num_labels++; | |
1284 | } | |
1285 | ||
1286 | return num_labels; | |
1287 | } | |
1288 | ||
a757997c JU |
1289 | static bool _netlink_route_encode_label_info(struct mpls_label_stack *nh_label, |
1290 | struct nlmsghdr *nlmsg, | |
1291 | size_t buflen, struct rtmsg *rtmsg, | |
1292 | char *label_buf, | |
1293 | size_t label_buf_size) | |
fa713d9e | 1294 | { |
d62a17ae | 1295 | mpls_lse_t out_lse[MPLS_MAX_LABELS]; |
a757997c | 1296 | int num_labels; |
bd47f3a3 | 1297 | |
d62a17ae | 1298 | /* |
1299 | * label_buf is *only* currently used within debugging. | |
1300 | * As such when we assign it we are guarding it inside | |
1301 | * a debug test. If you want to change this make sure | |
1302 | * you fix this assumption | |
1303 | */ | |
1304 | label_buf[0] = '\0'; | |
d62a17ae | 1305 | |
a757997c JU |
1306 | num_labels = |
1307 | build_label_stack(nh_label, out_lse, label_buf, label_buf_size); | |
fa712963 RW |
1308 | |
1309 | if (num_labels) { | |
1310 | /* Set the BoS bit */ | |
1311 | out_lse[num_labels - 1] |= htonl(1 << MPLS_LS_S_SHIFT); | |
1312 | ||
0be6e7d7 | 1313 | if (rtmsg->rtm_family == AF_MPLS) { |
a757997c | 1314 | if (!nl_attr_put(nlmsg, buflen, RTA_NEWDST, &out_lse, |
0be6e7d7 JU |
1315 | num_labels * sizeof(mpls_lse_t))) |
1316 | return false; | |
1317 | } else { | |
fa712963 | 1318 | struct rtattr *nest; |
fa712963 | 1319 | |
a757997c JU |
1320 | if (!nl_attr_put16(nlmsg, buflen, RTA_ENCAP_TYPE, |
1321 | LWTUNNEL_ENCAP_MPLS)) | |
0be6e7d7 JU |
1322 | return false; |
1323 | ||
a757997c | 1324 | nest = nl_attr_nest(nlmsg, buflen, RTA_ENCAP); |
0be6e7d7 JU |
1325 | if (!nest) |
1326 | return false; | |
1327 | ||
a757997c | 1328 | if (!nl_attr_put(nlmsg, buflen, MPLS_IPTUNNEL_DST, |
0be6e7d7 JU |
1329 | &out_lse, |
1330 | num_labels * sizeof(mpls_lse_t))) | |
1331 | return false; | |
312a6bee | 1332 | nl_attr_nest_end(nlmsg, nest); |
66d42727 | 1333 | } |
0aabccc0 | 1334 | } |
fa713d9e | 1335 | |
a757997c JU |
1336 | return true; |
1337 | } | |
1338 | ||
1339 | static bool _netlink_route_encode_nexthop_src(const struct nexthop *nexthop, | |
1340 | int family, | |
1341 | struct nlmsghdr *nlmsg, | |
1342 | size_t buflen, int bytelen) | |
1343 | { | |
1344 | if (family == AF_INET) { | |
1345 | if (nexthop->rmap_src.ipv4.s_addr != INADDR_ANY) { | |
1346 | if (!nl_attr_put(nlmsg, buflen, RTA_PREFSRC, | |
1347 | &nexthop->rmap_src.ipv4, bytelen)) | |
1348 | return false; | |
1349 | } else if (nexthop->src.ipv4.s_addr != INADDR_ANY) { | |
1350 | if (!nl_attr_put(nlmsg, buflen, RTA_PREFSRC, | |
1351 | &nexthop->src.ipv4, bytelen)) | |
1352 | return false; | |
1353 | } | |
1354 | } else if (family == AF_INET6) { | |
1355 | if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->rmap_src.ipv6)) { | |
1356 | if (!nl_attr_put(nlmsg, buflen, RTA_PREFSRC, | |
1357 | &nexthop->rmap_src.ipv6, bytelen)) | |
1358 | return false; | |
1359 | } else if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->src.ipv6)) { | |
1360 | if (!nl_attr_put(nlmsg, buflen, RTA_PREFSRC, | |
1361 | &nexthop->src.ipv6, bytelen)) | |
1362 | return false; | |
1363 | } | |
1364 | } | |
1365 | ||
1366 | return true; | |
1367 | } | |
1368 | ||
f463eac7 HS |
1369 | static ssize_t fill_seg6ipt_encap(char *buffer, size_t buflen, |
1370 | const struct in6_addr *seg) | |
76fb7ae4 HS |
1371 | { |
1372 | struct seg6_iptunnel_encap *ipt; | |
1373 | struct ipv6_sr_hdr *srh; | |
1374 | const size_t srhlen = 24; | |
4df9d859 | 1375 | |
f463eac7 HS |
1376 | /* |
1377 | * Caution: Support only SINGLE-SID, not MULTI-SID | |
1378 | * This function only supports the case where segs represents | |
1379 | * a single SID. If you want to extend the SRv6 functionality, | |
1380 | * you should improve the Boundary Check. | |
1381 | * Ex. In case of set a SID-List include multiple-SIDs as an | |
1382 | * argument of the Transit Behavior, we must support variable | |
1383 | * boundary check for buflen. | |
1384 | */ | |
1385 | if (buflen < (sizeof(struct seg6_iptunnel_encap) + | |
1386 | sizeof(struct ipv6_sr_hdr) + 16)) | |
1387 | return -1; | |
1388 | ||
76fb7ae4 HS |
1389 | memset(buffer, 0, buflen); |
1390 | ||
1391 | ipt = (struct seg6_iptunnel_encap *)buffer; | |
1392 | ipt->mode = SEG6_IPTUN_MODE_ENCAP; | |
1393 | srh = ipt->srh; | |
1394 | srh->hdrlen = (srhlen >> 3) - 1; | |
1395 | srh->type = 4; | |
1396 | srh->segments_left = 0; | |
1397 | srh->first_segment = 0; | |
1398 | memcpy(&srh->segments[0], seg, sizeof(struct in6_addr)); | |
1399 | ||
1400 | return srhlen + 4; | |
1401 | } | |
1402 | ||
a757997c JU |
1403 | /* This function takes a nexthop as argument and adds |
1404 | * the appropriate netlink attributes to an existing | |
1405 | * netlink message. | |
1406 | * | |
1407 | * @param routedesc: Human readable description of route type | |
1408 | * (direct/recursive, single-/multipath) | |
1409 | * @param bytelen: Length of addresses in bytes. | |
1410 | * @param nexthop: Nexthop information | |
1411 | * @param nlmsg: nlmsghdr structure to fill in. | |
1412 | * @param req_size: The size allocated for the message. | |
1413 | * | |
1414 | * The function returns true if the nexthop could be added | |
1415 | * to the message, otherwise false is returned. | |
1416 | */ | |
1417 | static bool _netlink_route_build_singlepath(const struct prefix *p, | |
1418 | const char *routedesc, int bytelen, | |
1419 | const struct nexthop *nexthop, | |
1420 | struct nlmsghdr *nlmsg, | |
1421 | struct rtmsg *rtmsg, | |
1422 | size_t req_size, int cmd) | |
1423 | { | |
1424 | ||
1425 | char label_buf[256]; | |
1426 | struct vrf *vrf; | |
1427 | char addrstr[INET6_ADDRSTRLEN]; | |
1428 | ||
1429 | assert(nexthop); | |
1430 | ||
1431 | vrf = vrf_lookup_by_id(nexthop->vrf_id); | |
1432 | ||
1433 | if (!_netlink_route_encode_label_info(nexthop->nh_label, nlmsg, | |
1434 | req_size, rtmsg, label_buf, | |
1435 | sizeof(label_buf))) | |
1436 | return false; | |
1437 | ||
eab0f8f0 HS |
1438 | if (nexthop->nh_srv6) { |
1439 | if (nexthop->nh_srv6->seg6local_action != | |
1440 | ZEBRA_SEG6_LOCAL_ACTION_UNSPEC) { | |
1441 | struct rtattr *nest; | |
1442 | const struct seg6local_context *ctx; | |
52026569 | 1443 | |
eab0f8f0 HS |
1444 | ctx = &nexthop->nh_srv6->seg6local_ctx; |
1445 | if (!nl_attr_put16(nlmsg, req_size, RTA_ENCAP_TYPE, | |
1446 | LWTUNNEL_ENCAP_SEG6_LOCAL)) | |
52026569 | 1447 | return false; |
eab0f8f0 HS |
1448 | |
1449 | nest = nl_attr_nest(nlmsg, req_size, RTA_ENCAP); | |
1450 | if (!nest) | |
52026569 | 1451 | return false; |
eab0f8f0 HS |
1452 | |
1453 | switch (nexthop->nh_srv6->seg6local_action) { | |
1454 | case ZEBRA_SEG6_LOCAL_ACTION_END: | |
1455 | if (!nl_attr_put32(nlmsg, req_size, | |
1456 | SEG6_LOCAL_ACTION, | |
1457 | SEG6_LOCAL_ACTION_END)) | |
1458 | return false; | |
1459 | break; | |
1460 | case ZEBRA_SEG6_LOCAL_ACTION_END_X: | |
1461 | if (!nl_attr_put32(nlmsg, req_size, | |
1462 | SEG6_LOCAL_ACTION, | |
1463 | SEG6_LOCAL_ACTION_END_X)) | |
1464 | return false; | |
1465 | if (!nl_attr_put(nlmsg, req_size, | |
1466 | SEG6_LOCAL_NH6, &ctx->nh6, | |
1467 | sizeof(struct in6_addr))) | |
1468 | return false; | |
1469 | break; | |
1470 | case ZEBRA_SEG6_LOCAL_ACTION_END_T: | |
1471 | if (!nl_attr_put32(nlmsg, req_size, | |
1472 | SEG6_LOCAL_ACTION, | |
1473 | SEG6_LOCAL_ACTION_END_T)) | |
1474 | return false; | |
1475 | if (!nl_attr_put32(nlmsg, req_size, | |
1476 | SEG6_LOCAL_TABLE, | |
1477 | ctx->table)) | |
1478 | return false; | |
1479 | break; | |
1480 | case ZEBRA_SEG6_LOCAL_ACTION_END_DX4: | |
1481 | if (!nl_attr_put32(nlmsg, req_size, | |
1482 | SEG6_LOCAL_ACTION, | |
1483 | SEG6_LOCAL_ACTION_END_DX4)) | |
1484 | return false; | |
1485 | if (!nl_attr_put(nlmsg, req_size, | |
1486 | SEG6_LOCAL_NH4, &ctx->nh4, | |
1487 | sizeof(struct in_addr))) | |
1488 | return false; | |
1489 | break; | |
1490 | case ZEBRA_SEG6_LOCAL_ACTION_END_DT6: | |
1491 | if (!nl_attr_put32(nlmsg, req_size, | |
1492 | SEG6_LOCAL_ACTION, | |
1493 | SEG6_LOCAL_ACTION_END_DT6)) | |
1494 | return false; | |
1495 | if (!nl_attr_put32(nlmsg, req_size, | |
1496 | SEG6_LOCAL_TABLE, | |
1497 | ctx->table)) | |
1498 | return false; | |
1499 | break; | |
7eab60a7 RS |
1500 | case ZEBRA_SEG6_LOCAL_ACTION_END_DT4: |
1501 | if (!nl_attr_put32(nlmsg, req_size, | |
1502 | SEG6_LOCAL_ACTION, | |
1503 | SEG6_LOCAL_ACTION_END_DT4)) | |
1504 | return false; | |
1505 | if (!nl_attr_put32(nlmsg, req_size, | |
1506 | SEG6_LOCAL_VRFTABLE, | |
1507 | ctx->table)) | |
1508 | return false; | |
1509 | break; | |
eab0f8f0 HS |
1510 | default: |
1511 | zlog_err("%s: unsupport seg6local behaviour action=%u", | |
1512 | __func__, | |
1513 | nexthop->nh_srv6->seg6local_action); | |
0a543b79 | 1514 | return false; |
eab0f8f0 HS |
1515 | } |
1516 | nl_attr_nest_end(nlmsg, nest); | |
1517 | } | |
1518 | ||
1519 | if (!sid_zero(&nexthop->nh_srv6->seg6_segs)) { | |
1520 | char tun_buf[4096]; | |
1521 | ssize_t tun_len; | |
1522 | struct rtattr *nest; | |
1523 | ||
1524 | if (!nl_attr_put16(nlmsg, req_size, RTA_ENCAP_TYPE, | |
1525 | LWTUNNEL_ENCAP_SEG6)) | |
52026569 | 1526 | return false; |
eab0f8f0 HS |
1527 | nest = nl_attr_nest(nlmsg, req_size, RTA_ENCAP); |
1528 | if (!nest) | |
52026569 | 1529 | return false; |
eab0f8f0 HS |
1530 | tun_len = fill_seg6ipt_encap(tun_buf, sizeof(tun_buf), |
1531 | &nexthop->nh_srv6->seg6_segs); | |
1532 | if (tun_len < 0) | |
52026569 | 1533 | return false; |
eab0f8f0 HS |
1534 | if (!nl_attr_put(nlmsg, req_size, SEG6_IPTUNNEL_SRH, |
1535 | tun_buf, tun_len)) | |
52026569 | 1536 | return false; |
eab0f8f0 | 1537 | nl_attr_nest_end(nlmsg, nest); |
8689b25a | 1538 | } |
76fb7ae4 HS |
1539 | } |
1540 | ||
d62a17ae | 1541 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ONLINK)) |
1542 | rtmsg->rtm_flags |= RTNH_F_ONLINK; | |
1543 | ||
002e5c43 | 1544 | if (is_route_v4_over_v6(rtmsg->rtm_family, nexthop->type)) { |
d62a17ae | 1545 | rtmsg->rtm_flags |= RTNH_F_ONLINK; |
0be6e7d7 JU |
1546 | if (!nl_attr_put(nlmsg, req_size, RTA_GATEWAY, &ipv4_ll, 4)) |
1547 | return false; | |
1548 | if (!nl_attr_put32(nlmsg, req_size, RTA_OIF, nexthop->ifindex)) | |
1549 | return false; | |
d62a17ae | 1550 | |
a757997c JU |
1551 | if (cmd == RTM_NEWROUTE) { |
1552 | if (!_netlink_route_encode_nexthop_src( | |
1553 | nexthop, AF_INET, nlmsg, req_size, bytelen)) | |
0be6e7d7 JU |
1554 | return false; |
1555 | } | |
d62a17ae | 1556 | |
1557 | if (IS_ZEBRA_DEBUG_KERNEL) | |
9266b315 RZ |
1558 | zlog_debug("%s: 5549 (%s): %pFX nexthop via %s %s if %u vrf %s(%u)", |
1559 | __func__, routedesc, p, ipv4_ll_buf, | |
1560 | label_buf, nexthop->ifindex, | |
1561 | VRF_LOGNAME(vrf), nexthop->vrf_id); | |
0be6e7d7 | 1562 | return true; |
0aabccc0 DD |
1563 | } |
1564 | ||
d62a17ae | 1565 | if (nexthop->type == NEXTHOP_TYPE_IPV4 |
1566 | || nexthop->type == NEXTHOP_TYPE_IPV4_IFINDEX) { | |
1567 | /* Send deletes to the kernel without specifying the next-hop */ | |
0be6e7d7 JU |
1568 | if (cmd != RTM_DELROUTE) { |
1569 | if (!_netlink_route_add_gateway_info( | |
1570 | rtmsg->rtm_family, AF_INET, nlmsg, req_size, | |
1571 | bytelen, nexthop)) | |
1572 | return false; | |
1573 | } | |
d62a17ae | 1574 | |
1575 | if (cmd == RTM_NEWROUTE) { | |
a757997c JU |
1576 | if (!_netlink_route_encode_nexthop_src( |
1577 | nexthop, AF_INET, nlmsg, req_size, bytelen)) | |
1578 | return false; | |
d62a17ae | 1579 | } |
1580 | ||
9266b315 RZ |
1581 | if (IS_ZEBRA_DEBUG_KERNEL) { |
1582 | inet_ntop(AF_INET, &nexthop->gate.ipv4, addrstr, | |
1583 | sizeof(addrstr)); | |
1584 | zlog_debug("%s: (%s): %pFX nexthop via %s %s if %u vrf %s(%u)", | |
1585 | __func__, routedesc, p, addrstr, label_buf, | |
1586 | nexthop->ifindex, VRF_LOGNAME(vrf), | |
1587 | nexthop->vrf_id); | |
1588 | } | |
0aabccc0 | 1589 | } |
fa713d9e | 1590 | |
d62a17ae | 1591 | if (nexthop->type == NEXTHOP_TYPE_IPV6 |
1592 | || nexthop->type == NEXTHOP_TYPE_IPV6_IFINDEX) { | |
0be6e7d7 JU |
1593 | if (!_netlink_route_add_gateway_info(rtmsg->rtm_family, |
1594 | AF_INET6, nlmsg, req_size, | |
1595 | bytelen, nexthop)) | |
1596 | return false; | |
d62a17ae | 1597 | |
1598 | if (cmd == RTM_NEWROUTE) { | |
a757997c JU |
1599 | if (!_netlink_route_encode_nexthop_src( |
1600 | nexthop, AF_INET6, nlmsg, req_size, | |
1601 | bytelen)) | |
1602 | return false; | |
d62a17ae | 1603 | } |
fa713d9e | 1604 | |
9266b315 RZ |
1605 | if (IS_ZEBRA_DEBUG_KERNEL) { |
1606 | inet_ntop(AF_INET6, &nexthop->gate.ipv6, addrstr, | |
1607 | sizeof(addrstr)); | |
1608 | zlog_debug("%s: (%s): %pFX nexthop via %s %s if %u vrf %s(%u)", | |
1609 | __func__, routedesc, p, addrstr, label_buf, | |
1610 | nexthop->ifindex, VRF_LOGNAME(vrf), | |
1611 | nexthop->vrf_id); | |
1612 | } | |
d62a17ae | 1613 | } |
5e210522 DS |
1614 | |
1615 | /* | |
1616 | * We have the ifindex so we should always send it | |
1617 | * This is especially useful if we are doing route | |
1618 | * leaking. | |
1619 | */ | |
0be6e7d7 JU |
1620 | if (nexthop->type != NEXTHOP_TYPE_BLACKHOLE) { |
1621 | if (!nl_attr_put32(nlmsg, req_size, RTA_OIF, nexthop->ifindex)) | |
1622 | return false; | |
1623 | } | |
d62a17ae | 1624 | |
275565fb | 1625 | if (nexthop->type == NEXTHOP_TYPE_IFINDEX) { |
d62a17ae | 1626 | if (cmd == RTM_NEWROUTE) { |
a757997c JU |
1627 | if (!_netlink_route_encode_nexthop_src( |
1628 | nexthop, AF_INET, nlmsg, req_size, bytelen)) | |
1629 | return false; | |
d62a17ae | 1630 | } |
fa713d9e | 1631 | |
d62a17ae | 1632 | if (IS_ZEBRA_DEBUG_KERNEL) |
9266b315 RZ |
1633 | zlog_debug("%s: (%s): %pFX nexthop via if %u vrf %s(%u)", |
1634 | __func__, routedesc, p, nexthop->ifindex, | |
1635 | VRF_LOGNAME(vrf), nexthop->vrf_id); | |
0aabccc0 | 1636 | } |
0be6e7d7 JU |
1637 | |
1638 | return true; | |
fa713d9e CF |
1639 | } |
1640 | ||
1641 | /* This function takes a nexthop as argument and | |
312a6bee | 1642 | * appends to the given netlink msg. If the nexthop |
fa713d9e CF |
1643 | * defines a preferred source, the src parameter |
1644 | * will be modified to point to that src, otherwise | |
1645 | * it will be kept unmodified. | |
1646 | * | |
1647 | * @param routedesc: Human readable description of route type | |
1648 | * (direct/recursive, single-/multipath) | |
1649 | * @param bytelen: Length of addresses in bytes. | |
1650 | * @param nexthop: Nexthop information | |
312a6bee JU |
1651 | * @param nlmsg: nlmsghdr structure to fill in. |
1652 | * @param req_size: The size allocated for the message. | |
fa713d9e CF |
1653 | * @param src: pointer pointing to a location where |
1654 | * the prefsrc should be stored. | |
0be6e7d7 JU |
1655 | * |
1656 | * The function returns true if the nexthop could be added | |
1657 | * to the message, otherwise false is returned. | |
fa713d9e | 1658 | */ |
0be6e7d7 | 1659 | static bool _netlink_route_build_multipath(const struct prefix *p, |
312a6bee JU |
1660 | const char *routedesc, int bytelen, |
1661 | const struct nexthop *nexthop, | |
1662 | struct nlmsghdr *nlmsg, | |
1663 | size_t req_size, struct rtmsg *rtmsg, | |
1664 | const union g_addr **src) | |
fa713d9e | 1665 | { |
9a62e84b | 1666 | char label_buf[256]; |
bd47f3a3 | 1667 | struct vrf *vrf; |
312a6bee | 1668 | struct rtnexthop *rtnh; |
d62a17ae | 1669 | |
312a6bee | 1670 | rtnh = nl_attr_rtnh(nlmsg, req_size); |
0be6e7d7 JU |
1671 | if (rtnh == NULL) |
1672 | return false; | |
d62a17ae | 1673 | |
b7537db6 SW |
1674 | assert(nexthop); |
1675 | ||
bd47f3a3 JU |
1676 | vrf = vrf_lookup_by_id(nexthop->vrf_id); |
1677 | ||
a757997c JU |
1678 | if (!_netlink_route_encode_label_info(nexthop->nh_label, nlmsg, |
1679 | req_size, rtmsg, label_buf, | |
1680 | sizeof(label_buf))) | |
1681 | return false; | |
d62a17ae | 1682 | |
1683 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ONLINK)) | |
1684 | rtnh->rtnh_flags |= RTNH_F_ONLINK; | |
1685 | ||
002e5c43 | 1686 | if (is_route_v4_over_v6(rtmsg->rtm_family, nexthop->type)) { |
d62a17ae | 1687 | rtnh->rtnh_flags |= RTNH_F_ONLINK; |
a757997c | 1688 | if (!nl_attr_put(nlmsg, req_size, RTA_GATEWAY, &ipv4_ll, 4)) |
0be6e7d7 | 1689 | return false; |
d62a17ae | 1690 | rtnh->rtnh_ifindex = nexthop->ifindex; |
8d27e1aa | 1691 | if (nexthop->weight) |
1692 | rtnh->rtnh_hops = nexthop->weight - 1; | |
d62a17ae | 1693 | |
975a328e | 1694 | if (nexthop->rmap_src.ipv4.s_addr != INADDR_ANY) |
d62a17ae | 1695 | *src = &nexthop->rmap_src; |
975a328e | 1696 | else if (nexthop->src.ipv4.s_addr != INADDR_ANY) |
d62a17ae | 1697 | *src = &nexthop->src; |
1698 | ||
1699 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1700 | zlog_debug( | |
9266b315 RZ |
1701 | "%s: 5549 (%s): %pFX nexthop via %s %s if %u vrf %s(%u)", |
1702 | __func__, routedesc, p, ipv4_ll_buf, label_buf, | |
bd47f3a3 JU |
1703 | nexthop->ifindex, VRF_LOGNAME(vrf), |
1704 | nexthop->vrf_id); | |
312a6bee | 1705 | nl_attr_rtnh_end(nlmsg, rtnh); |
0be6e7d7 | 1706 | return true; |
d62a17ae | 1707 | } |
1708 | ||
1709 | if (nexthop->type == NEXTHOP_TYPE_IPV4 | |
1710 | || nexthop->type == NEXTHOP_TYPE_IPV4_IFINDEX) { | |
0be6e7d7 JU |
1711 | if (!_netlink_route_add_gateway_info(rtmsg->rtm_family, AF_INET, |
1712 | nlmsg, req_size, bytelen, | |
1713 | nexthop)) | |
1714 | return false; | |
1715 | ||
975a328e | 1716 | if (nexthop->rmap_src.ipv4.s_addr != INADDR_ANY) |
d62a17ae | 1717 | *src = &nexthop->rmap_src; |
975a328e | 1718 | else if (nexthop->src.ipv4.s_addr != INADDR_ANY) |
d62a17ae | 1719 | *src = &nexthop->src; |
1720 | ||
a50404aa RZ |
1721 | if (IS_ZEBRA_DEBUG_KERNEL) |
1722 | zlog_debug("%s: (%s): %pFX nexthop via %pI4 %s if %u vrf %s(%u)", | |
1723 | __func__, routedesc, p, &nexthop->gate.ipv4, | |
1724 | label_buf, nexthop->ifindex, | |
1725 | VRF_LOGNAME(vrf), nexthop->vrf_id); | |
d62a17ae | 1726 | } |
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 (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->rmap_src.ipv6)) | |
1735 | *src = &nexthop->rmap_src; | |
1736 | else if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->src.ipv6)) | |
1737 | *src = &nexthop->src; | |
1738 | ||
a50404aa RZ |
1739 | if (IS_ZEBRA_DEBUG_KERNEL) |
1740 | zlog_debug("%s: (%s): %pFX nexthop via %pI6 %s if %u vrf %s(%u)", | |
1741 | __func__, routedesc, p, &nexthop->gate.ipv6, | |
1742 | label_buf, nexthop->ifindex, | |
1743 | VRF_LOGNAME(vrf), nexthop->vrf_id); | |
d62a17ae | 1744 | } |
5e210522 DS |
1745 | |
1746 | /* | |
1747 | * We have figured out the ifindex so we should always send it | |
1748 | * This is especially useful if we are doing route | |
1749 | * leaking. | |
1750 | */ | |
1751 | if (nexthop->type != NEXTHOP_TYPE_BLACKHOLE) | |
1752 | rtnh->rtnh_ifindex = nexthop->ifindex; | |
1753 | ||
d62a17ae | 1754 | /* ifindex */ |
275565fb | 1755 | if (nexthop->type == NEXTHOP_TYPE_IFINDEX) { |
975a328e | 1756 | if (nexthop->rmap_src.ipv4.s_addr != INADDR_ANY) |
d62a17ae | 1757 | *src = &nexthop->rmap_src; |
975a328e | 1758 | else if (nexthop->src.ipv4.s_addr != INADDR_ANY) |
d62a17ae | 1759 | *src = &nexthop->src; |
1760 | ||
1761 | if (IS_ZEBRA_DEBUG_KERNEL) | |
9266b315 RZ |
1762 | zlog_debug("%s: (%s): %pFX nexthop via if %u vrf %s(%u)", |
1763 | __func__, routedesc, p, nexthop->ifindex, | |
1764 | VRF_LOGNAME(vrf), nexthop->vrf_id); | |
d62a17ae | 1765 | } |
df7fb580 DS |
1766 | |
1767 | if (nexthop->weight) | |
1768 | rtnh->rtnh_hops = nexthop->weight - 1; | |
0be6e7d7 | 1769 | |
312a6bee | 1770 | nl_attr_rtnh_end(nlmsg, rtnh); |
0be6e7d7 | 1771 | return true; |
fa713d9e CF |
1772 | } |
1773 | ||
f2595bd5 DS |
1774 | static inline bool |
1775 | _netlink_mpls_build_singlepath(const struct prefix *p, const char *routedesc, | |
1776 | const struct zebra_nhlfe *nhlfe, | |
1777 | struct nlmsghdr *nlmsg, struct rtmsg *rtmsg, | |
1778 | size_t req_size, int cmd) | |
40c7bdb0 | 1779 | { |
d62a17ae | 1780 | int bytelen; |
d7c0a89a | 1781 | uint8_t family; |
40c7bdb0 | 1782 | |
d62a17ae | 1783 | family = NHLFE_FAMILY(nhlfe); |
1784 | bytelen = (family == AF_INET ? 4 : 16); | |
0be6e7d7 JU |
1785 | return _netlink_route_build_singlepath(p, routedesc, bytelen, |
1786 | nhlfe->nexthop, nlmsg, rtmsg, | |
1787 | req_size, cmd); | |
40c7bdb0 | 1788 | } |
1789 | ||
1790 | ||
0be6e7d7 | 1791 | static inline bool |
9a0132a5 | 1792 | _netlink_mpls_build_multipath(const struct prefix *p, const char *routedesc, |
f2595bd5 | 1793 | const struct zebra_nhlfe *nhlfe, |
312a6bee JU |
1794 | struct nlmsghdr *nlmsg, size_t req_size, |
1795 | struct rtmsg *rtmsg, const union g_addr **src) | |
40c7bdb0 | 1796 | { |
d62a17ae | 1797 | int bytelen; |
d7c0a89a | 1798 | uint8_t family; |
40c7bdb0 | 1799 | |
d62a17ae | 1800 | family = NHLFE_FAMILY(nhlfe); |
1801 | bytelen = (family == AF_INET ? 4 : 16); | |
0be6e7d7 JU |
1802 | return _netlink_route_build_multipath(p, routedesc, bytelen, |
1803 | nhlfe->nexthop, nlmsg, req_size, | |
1804 | rtmsg, src); | |
40c7bdb0 | 1805 | } |
1806 | ||
d7c0a89a | 1807 | static void _netlink_mpls_debug(int cmd, uint32_t label, const char *routedesc) |
40c7bdb0 | 1808 | { |
d62a17ae | 1809 | if (IS_ZEBRA_DEBUG_KERNEL) |
0be6e7d7 JU |
1810 | zlog_debug("netlink_mpls_multipath_msg_encode() (%s): %s %u/20", |
1811 | routedesc, nl_msg_type_to_str(cmd), label); | |
fa713d9e CF |
1812 | } |
1813 | ||
05657ec2 PG |
1814 | static int netlink_neigh_update(int cmd, int ifindex, void *addr, char *lla, |
1815 | int llalen, ns_id_t ns_id, uint8_t family, | |
1816 | bool permanent, uint8_t protocol) | |
5c610faf | 1817 | { |
d62a17ae | 1818 | struct { |
1819 | struct nlmsghdr n; | |
1820 | struct ndmsg ndm; | |
1821 | char buf[256]; | |
1822 | } req; | |
5c610faf | 1823 | |
5895d33f | 1824 | struct zebra_ns *zns = zebra_ns_lookup(ns_id); |
8f7d9fc0 | 1825 | |
5605ecfc | 1826 | memset(&req, 0, sizeof(req)); |
5c610faf | 1827 | |
d62a17ae | 1828 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)); |
1829 | req.n.nlmsg_flags = NLM_F_CREATE | NLM_F_REQUEST; | |
1830 | req.n.nlmsg_type = cmd; // RTM_NEWNEIGH or RTM_DELNEIGH | |
1831 | req.n.nlmsg_pid = zns->netlink_cmd.snl.nl_pid; | |
a55ba23f | 1832 | |
05657ec2 | 1833 | req.ndm.ndm_family = family; |
d62a17ae | 1834 | req.ndm.ndm_ifindex = ifindex; |
1835 | req.ndm.ndm_type = RTN_UNICAST; | |
05657ec2 PG |
1836 | if (cmd == RTM_NEWNEIGH) { |
1837 | if (!permanent) | |
1838 | req.ndm.ndm_state = NUD_REACHABLE; | |
1839 | else | |
1840 | req.ndm.ndm_state = NUD_PERMANENT; | |
1841 | } else | |
1842 | req.ndm.ndm_state = NUD_FAILED; | |
5c610faf | 1843 | |
312a6bee JU |
1844 | nl_attr_put(&req.n, sizeof(req), NDA_PROTOCOL, &protocol, |
1845 | sizeof(protocol)); | |
05657ec2 | 1846 | req.ndm.ndm_type = RTN_UNICAST; |
df948efc PG |
1847 | nl_attr_put(&req.n, sizeof(req), NDA_DST, addr, |
1848 | family2addrsize(family)); | |
05657ec2 PG |
1849 | if (lla) |
1850 | nl_attr_put(&req.n, sizeof(req), NDA_LLADDR, lla, llalen); | |
5c610faf | 1851 | |
d62a17ae | 1852 | return netlink_talk(netlink_talk_filter, &req.n, &zns->netlink_cmd, zns, |
9bfadae8 | 1853 | false); |
5c610faf DS |
1854 | } |
1855 | ||
762288f5 SW |
1856 | static bool nexthop_set_src(const struct nexthop *nexthop, int family, |
1857 | union g_addr *src) | |
1858 | { | |
1859 | if (family == AF_INET) { | |
1860 | if (nexthop->rmap_src.ipv4.s_addr != INADDR_ANY) { | |
1861 | src->ipv4 = nexthop->rmap_src.ipv4; | |
1862 | return true; | |
1863 | } else if (nexthop->src.ipv4.s_addr != INADDR_ANY) { | |
1864 | src->ipv4 = nexthop->src.ipv4; | |
1865 | return true; | |
1866 | } | |
1867 | } else if (family == AF_INET6) { | |
1868 | if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->rmap_src.ipv6)) { | |
1869 | src->ipv6 = nexthop->rmap_src.ipv6; | |
1870 | return true; | |
1871 | } else if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->src.ipv6)) { | |
1872 | src->ipv6 = nexthop->src.ipv6; | |
1873 | return true; | |
1874 | } | |
1875 | } | |
1876 | ||
1877 | return false; | |
1878 | } | |
1879 | ||
0be6e7d7 JU |
1880 | /* |
1881 | * The function returns true if the attribute could be added | |
1882 | * to the message, otherwise false is returned. | |
1883 | */ | |
1884 | static int netlink_route_nexthop_encap(struct nlmsghdr *n, size_t nlen, | |
1885 | struct nexthop *nh) | |
f2a0ba3a RZ |
1886 | { |
1887 | struct rtattr *nest; | |
1888 | ||
1889 | switch (nh->nh_encap_type) { | |
1890 | case NET_VXLAN: | |
a757997c | 1891 | if (!nl_attr_put16(n, nlen, RTA_ENCAP_TYPE, nh->nh_encap_type)) |
0be6e7d7 | 1892 | return false; |
f2a0ba3a | 1893 | |
312a6bee | 1894 | nest = nl_attr_nest(n, nlen, RTA_ENCAP); |
0be6e7d7 JU |
1895 | if (!nest) |
1896 | return false; | |
1897 | ||
1898 | if (!nl_attr_put32(n, nlen, 0 /* VXLAN_VNI */, | |
1899 | nh->nh_encap.vni)) | |
1900 | return false; | |
312a6bee | 1901 | nl_attr_nest_end(n, nest); |
f2a0ba3a RZ |
1902 | break; |
1903 | } | |
0be6e7d7 JU |
1904 | |
1905 | return true; | |
f2a0ba3a RZ |
1906 | } |
1907 | ||
7cdb1a84 MS |
1908 | /* |
1909 | * Routing table change via netlink interface, using a dataplane context object | |
0be6e7d7 JU |
1910 | * |
1911 | * Returns -1 on failure, 0 when the msg doesn't fit entirely in the buffer | |
1912 | * otherwise the number of bytes written to buf. | |
7cdb1a84 | 1913 | */ |
0be6e7d7 JU |
1914 | ssize_t netlink_route_multipath_msg_encode(int cmd, |
1915 | struct zebra_dplane_ctx *ctx, | |
1916 | uint8_t *data, size_t datalen, | |
1917 | bool fpm, bool force_nhg) | |
7cdb1a84 MS |
1918 | { |
1919 | int bytelen; | |
7cdb1a84 MS |
1920 | struct nexthop *nexthop = NULL; |
1921 | unsigned int nexthop_num; | |
7cdb1a84 | 1922 | const char *routedesc; |
762288f5 | 1923 | bool setsrc = false; |
7cdb1a84 MS |
1924 | union g_addr src; |
1925 | const struct prefix *p, *src_p; | |
1926 | uint32_t table_id; | |
d4000d7b | 1927 | struct nlsock *nl; |
7cdb1a84 MS |
1928 | |
1929 | struct { | |
1930 | struct nlmsghdr n; | |
1931 | struct rtmsg r; | |
e57a3fab RZ |
1932 | char buf[]; |
1933 | } *req = (void *)data; | |
7cdb1a84 MS |
1934 | |
1935 | p = dplane_ctx_get_dest(ctx); | |
1936 | src_p = dplane_ctx_get_src(ctx); | |
1937 | ||
0be6e7d7 JU |
1938 | if (datalen < sizeof(*req)) |
1939 | return 0; | |
1940 | ||
d4000d7b DS |
1941 | nl = kernel_netlink_nlsock_lookup(dplane_ctx_get_ns_sock(ctx)); |
1942 | ||
e57a3fab | 1943 | memset(req, 0, sizeof(*req)); |
7cdb1a84 | 1944 | |
b9c87515 | 1945 | bytelen = (p->family == AF_INET ? 4 : 16); |
7cdb1a84 | 1946 | |
e57a3fab RZ |
1947 | req->n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)); |
1948 | req->n.nlmsg_flags = NLM_F_CREATE | NLM_F_REQUEST; | |
7cdb1a84 | 1949 | |
334734a8 DS |
1950 | if ((cmd == RTM_NEWROUTE) && |
1951 | ((p->family == AF_INET) || v6_rr_semantics)) | |
e57a3fab | 1952 | req->n.nlmsg_flags |= NLM_F_REPLACE; |
7cdb1a84 | 1953 | |
e57a3fab | 1954 | req->n.nlmsg_type = cmd; |
7cdb1a84 | 1955 | |
d4000d7b | 1956 | req->n.nlmsg_pid = nl->snl.nl_pid; |
7cdb1a84 | 1957 | |
b9c87515 | 1958 | req->r.rtm_family = p->family; |
e57a3fab RZ |
1959 | req->r.rtm_dst_len = p->prefixlen; |
1960 | req->r.rtm_src_len = src_p ? src_p->prefixlen : 0; | |
1961 | req->r.rtm_scope = RT_SCOPE_UNIVERSE; | |
7cdb1a84 | 1962 | |
5709131c | 1963 | if (cmd == RTM_DELROUTE) |
e57a3fab | 1964 | req->r.rtm_protocol = zebra2proto(dplane_ctx_get_old_type(ctx)); |
5709131c | 1965 | else |
e57a3fab | 1966 | req->r.rtm_protocol = zebra2proto(dplane_ctx_get_type(ctx)); |
7cdb1a84 MS |
1967 | |
1968 | /* | |
1969 | * blackhole routes are not RTN_UNICAST, they are | |
1970 | * RTN_ BLACKHOLE|UNREACHABLE|PROHIBIT | |
1971 | * so setting this value as a RTN_UNICAST would | |
1972 | * cause the route lookup of just the prefix | |
1973 | * to fail. So no need to specify this for | |
1974 | * the RTM_DELROUTE case | |
1975 | */ | |
1976 | if (cmd != RTM_DELROUTE) | |
e57a3fab | 1977 | req->r.rtm_type = RTN_UNICAST; |
7cdb1a84 | 1978 | |
0be6e7d7 JU |
1979 | if (!nl_attr_put(&req->n, datalen, RTA_DST, &p->u.prefix, bytelen)) |
1980 | return 0; | |
1981 | if (src_p) { | |
1982 | if (!nl_attr_put(&req->n, datalen, RTA_SRC, &src_p->u.prefix, | |
1983 | bytelen)) | |
1984 | return 0; | |
1985 | } | |
7cdb1a84 MS |
1986 | |
1987 | /* Metric. */ | |
1988 | /* Hardcode the metric for all routes coming from zebra. Metric isn't | |
1989 | * used | |
1990 | * either by the kernel or by zebra. Its purely for calculating best | |
1991 | * path(s) | |
1992 | * by the routing protocol and for communicating with protocol peers. | |
1993 | */ | |
0be6e7d7 JU |
1994 | if (!nl_attr_put32(&req->n, datalen, RTA_PRIORITY, |
1995 | NL_DEFAULT_ROUTE_METRIC)) | |
1996 | return 0; | |
7cdb1a84 MS |
1997 | |
1998 | #if defined(SUPPORT_REALMS) | |
1999 | { | |
2000 | route_tag_t tag; | |
2001 | ||
5709131c | 2002 | if (cmd == RTM_DELROUTE) |
7cdb1a84 | 2003 | tag = dplane_ctx_get_old_tag(ctx); |
5709131c | 2004 | else |
7cdb1a84 | 2005 | tag = dplane_ctx_get_tag(ctx); |
7cdb1a84 | 2006 | |
0be6e7d7 JU |
2007 | if (tag > 0 && tag <= 255) { |
2008 | if (!nl_attr_put32(&req->n, datalen, RTA_FLOW, tag)) | |
2009 | return 0; | |
2010 | } | |
7cdb1a84 MS |
2011 | } |
2012 | #endif | |
2013 | /* Table corresponding to this route. */ | |
2014 | table_id = dplane_ctx_get_table(ctx); | |
2015 | if (table_id < 256) | |
e57a3fab | 2016 | req->r.rtm_table = table_id; |
7cdb1a84 | 2017 | else { |
e57a3fab | 2018 | req->r.rtm_table = RT_TABLE_UNSPEC; |
0be6e7d7 JU |
2019 | if (!nl_attr_put32(&req->n, datalen, RTA_TABLE, table_id)) |
2020 | return 0; | |
7cdb1a84 MS |
2021 | } |
2022 | ||
9266b315 RZ |
2023 | if (IS_ZEBRA_DEBUG_KERNEL) |
2024 | zlog_debug( | |
2025 | "%s: %s %pFX vrf %u(%u)", __func__, | |
2026 | nl_msg_type_to_str(cmd), p, dplane_ctx_get_vrf(ctx), | |
2027 | table_id); | |
7cdb1a84 MS |
2028 | |
2029 | /* | |
2030 | * If we are not updating the route and we have received | |
2031 | * a route delete, then all we need to fill in is the | |
2032 | * prefix information to tell the kernel to schwack | |
2033 | * it. | |
2034 | */ | |
2035 | if (cmd == RTM_DELROUTE) | |
0be6e7d7 | 2036 | return NLMSG_ALIGN(req->n.nlmsg_len); |
7cdb1a84 MS |
2037 | |
2038 | if (dplane_ctx_get_mtu(ctx) || dplane_ctx_get_nh_mtu(ctx)) { | |
312a6bee | 2039 | struct rtattr *nest; |
7cdb1a84 MS |
2040 | uint32_t mtu = dplane_ctx_get_mtu(ctx); |
2041 | uint32_t nexthop_mtu = dplane_ctx_get_nh_mtu(ctx); | |
5709131c | 2042 | |
7cdb1a84 MS |
2043 | if (!mtu || (nexthop_mtu && nexthop_mtu < mtu)) |
2044 | mtu = nexthop_mtu; | |
312a6bee JU |
2045 | |
2046 | nest = nl_attr_nest(&req->n, datalen, RTA_METRICS); | |
0be6e7d7 JU |
2047 | if (nest == NULL) |
2048 | return 0; | |
2049 | ||
2050 | if (!nl_attr_put(&req->n, datalen, RTAX_MTU, &mtu, sizeof(mtu))) | |
2051 | return 0; | |
312a6bee | 2052 | nl_attr_nest_end(&req->n, nest); |
7cdb1a84 MS |
2053 | } |
2054 | ||
4be03ff4 IR |
2055 | /* |
2056 | * Always install blackhole routes without using nexthops, because of | |
2057 | * the following kernel problems: | |
2058 | * 1. Kernel nexthops don't suport unreachable/prohibit route types. | |
2059 | * 2. Blackhole kernel nexthops are deleted when loopback is down. | |
2060 | */ | |
2061 | nexthop = dplane_ctx_get_ng(ctx)->nexthop; | |
2062 | if (nexthop) { | |
2063 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_RECURSIVE)) | |
2064 | nexthop = nexthop->resolved; | |
2065 | ||
2066 | if (nexthop->type == NEXTHOP_TYPE_BLACKHOLE) { | |
2067 | switch (nexthop->bh_type) { | |
2068 | case BLACKHOLE_ADMINPROHIB: | |
2069 | req->r.rtm_type = RTN_PROHIBIT; | |
2070 | break; | |
2071 | case BLACKHOLE_REJECT: | |
2072 | req->r.rtm_type = RTN_UNREACHABLE; | |
2073 | break; | |
2074 | default: | |
2075 | req->r.rtm_type = RTN_BLACKHOLE; | |
2076 | break; | |
2077 | } | |
2078 | return NLMSG_ALIGN(req->n.nlmsg_len); | |
2079 | } | |
2080 | } | |
2081 | ||
6c67f41f SW |
2082 | if ((!fpm && kernel_nexthops_supported() |
2083 | && (!proto_nexthops_only() | |
2084 | || is_proto_nhg(dplane_ctx_get_nhe_id(ctx), 0))) | |
2085 | || (fpm && force_nhg)) { | |
d8bfd8dc | 2086 | /* Kernel supports nexthop objects */ |
9a0132a5 | 2087 | if (IS_ZEBRA_DEBUG_KERNEL) |
0be6e7d7 JU |
2088 | zlog_debug("%s: %pFX nhg_id is %u", __func__, p, |
2089 | dplane_ctx_get_nhe_id(ctx)); | |
e57a3fab | 2090 | |
0be6e7d7 JU |
2091 | if (!nl_attr_put32(&req->n, datalen, RTA_NH_ID, |
2092 | dplane_ctx_get_nhe_id(ctx))) | |
2093 | return 0; | |
d8bfd8dc SW |
2094 | |
2095 | /* Have to determine src still */ | |
2096 | for (ALL_NEXTHOPS_PTR(dplane_ctx_get_ng(ctx), nexthop)) { | |
2097 | if (setsrc) | |
2098 | break; | |
2099 | ||
e57a3fab | 2100 | setsrc = nexthop_set_src(nexthop, p->family, &src); |
d8bfd8dc SW |
2101 | } |
2102 | ||
2103 | if (setsrc) { | |
0be6e7d7 JU |
2104 | if (p->family == AF_INET) { |
2105 | if (!nl_attr_put(&req->n, datalen, RTA_PREFSRC, | |
2106 | &src.ipv4, bytelen)) | |
2107 | return 0; | |
2108 | } else if (p->family == AF_INET6) { | |
2109 | if (!nl_attr_put(&req->n, datalen, RTA_PREFSRC, | |
2110 | &src.ipv6, bytelen)) | |
2111 | return 0; | |
2112 | } | |
d8bfd8dc | 2113 | } |
f78fe8f3 | 2114 | |
0be6e7d7 | 2115 | return NLMSG_ALIGN(req->n.nlmsg_len); |
de3f5488 SW |
2116 | } |
2117 | ||
7cdb1a84 | 2118 | /* Count overall nexthops so we can decide whether to use singlepath |
5709131c MS |
2119 | * or multipath case. |
2120 | */ | |
7cdb1a84 MS |
2121 | nexthop_num = 0; |
2122 | for (ALL_NEXTHOPS_PTR(dplane_ctx_get_ng(ctx), nexthop)) { | |
2123 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_RECURSIVE)) | |
2124 | continue; | |
b9c87515 | 2125 | if (!NEXTHOP_IS_ACTIVE(nexthop->flags)) |
7cdb1a84 MS |
2126 | continue; |
2127 | ||
2128 | nexthop_num++; | |
2129 | } | |
2130 | ||
2131 | /* Singlepath case. */ | |
220f0f42 | 2132 | if (nexthop_num == 1) { |
7cdb1a84 MS |
2133 | nexthop_num = 0; |
2134 | for (ALL_NEXTHOPS_PTR(dplane_ctx_get_ng(ctx), nexthop)) { | |
7cdb1a84 MS |
2135 | if (CHECK_FLAG(nexthop->flags, |
2136 | NEXTHOP_FLAG_RECURSIVE)) { | |
5709131c MS |
2137 | |
2138 | if (setsrc) | |
2139 | continue; | |
2140 | ||
b9c87515 RZ |
2141 | setsrc = nexthop_set_src(nexthop, p->family, |
2142 | &src); | |
f183e380 | 2143 | continue; |
7cdb1a84 MS |
2144 | } |
2145 | ||
b9c87515 | 2146 | if (NEXTHOP_IS_ACTIVE(nexthop->flags)) { |
7cdb1a84 MS |
2147 | routedesc = nexthop->rparent |
2148 | ? "recursive, single-path" | |
2149 | : "single-path"; | |
2150 | ||
0be6e7d7 JU |
2151 | if (!_netlink_route_build_singlepath( |
2152 | p, routedesc, bytelen, nexthop, | |
2153 | &req->n, &req->r, datalen, cmd)) | |
2154 | return 0; | |
7cdb1a84 MS |
2155 | nexthop_num++; |
2156 | break; | |
2157 | } | |
f2a0ba3a RZ |
2158 | |
2159 | /* | |
2160 | * Add encapsulation information when installing via | |
2161 | * FPM. | |
2162 | */ | |
0be6e7d7 JU |
2163 | if (fpm) { |
2164 | if (!netlink_route_nexthop_encap( | |
2165 | &req->n, datalen, nexthop)) | |
2166 | return 0; | |
2167 | } | |
7cdb1a84 | 2168 | } |
f2a0ba3a | 2169 | |
13e0321a | 2170 | if (setsrc) { |
0be6e7d7 JU |
2171 | if (p->family == AF_INET) { |
2172 | if (!nl_attr_put(&req->n, datalen, RTA_PREFSRC, | |
2173 | &src.ipv4, bytelen)) | |
2174 | return 0; | |
2175 | } else if (p->family == AF_INET6) { | |
2176 | if (!nl_attr_put(&req->n, datalen, RTA_PREFSRC, | |
2177 | &src.ipv6, bytelen)) | |
2178 | return 0; | |
2179 | } | |
7cdb1a84 MS |
2180 | } |
2181 | } else { /* Multipath case */ | |
312a6bee | 2182 | struct rtattr *nest; |
81793ac1 | 2183 | const union g_addr *src1 = NULL; |
7cdb1a84 | 2184 | |
312a6bee | 2185 | nest = nl_attr_nest(&req->n, datalen, RTA_MULTIPATH); |
0be6e7d7 JU |
2186 | if (nest == NULL) |
2187 | return 0; | |
7cdb1a84 MS |
2188 | |
2189 | nexthop_num = 0; | |
2190 | for (ALL_NEXTHOPS_PTR(dplane_ctx_get_ng(ctx), nexthop)) { | |
7cdb1a84 MS |
2191 | if (CHECK_FLAG(nexthop->flags, |
2192 | NEXTHOP_FLAG_RECURSIVE)) { | |
2193 | /* This only works for IPv4 now */ | |
5709131c MS |
2194 | if (setsrc) |
2195 | continue; | |
2196 | ||
b9c87515 RZ |
2197 | setsrc = nexthop_set_src(nexthop, p->family, |
2198 | &src); | |
78e54ded | 2199 | continue; |
7cdb1a84 MS |
2200 | } |
2201 | ||
b9c87515 | 2202 | if (NEXTHOP_IS_ACTIVE(nexthop->flags)) { |
7cdb1a84 MS |
2203 | routedesc = nexthop->rparent |
2204 | ? "recursive, multipath" | |
2205 | : "multipath"; | |
2206 | nexthop_num++; | |
2207 | ||
0be6e7d7 JU |
2208 | if (!_netlink_route_build_multipath( |
2209 | p, routedesc, bytelen, nexthop, | |
2210 | &req->n, datalen, &req->r, &src1)) | |
2211 | return 0; | |
7cdb1a84 MS |
2212 | |
2213 | if (!setsrc && src1) { | |
b9c87515 | 2214 | if (p->family == AF_INET) |
7cdb1a84 | 2215 | src.ipv4 = src1->ipv4; |
b9c87515 | 2216 | else if (p->family == AF_INET6) |
7cdb1a84 MS |
2217 | src.ipv6 = src1->ipv6; |
2218 | ||
2219 | setsrc = 1; | |
2220 | } | |
2221 | } | |
312a6bee | 2222 | } |
0be6e7d7 | 2223 | |
312a6bee JU |
2224 | nl_attr_nest_end(&req->n, nest); |
2225 | ||
2226 | /* | |
2227 | * Add encapsulation information when installing via | |
2228 | * FPM. | |
2229 | */ | |
2230 | if (fpm) { | |
2231 | for (ALL_NEXTHOPS_PTR(dplane_ctx_get_ng(ctx), | |
2232 | nexthop)) { | |
2233 | if (CHECK_FLAG(nexthop->flags, | |
2234 | NEXTHOP_FLAG_RECURSIVE)) | |
2235 | continue; | |
0be6e7d7 JU |
2236 | if (!netlink_route_nexthop_encap( |
2237 | &req->n, datalen, nexthop)) | |
2238 | return 0; | |
312a6bee | 2239 | } |
7cdb1a84 | 2240 | } |
f2a0ba3a | 2241 | |
312a6bee | 2242 | |
13e0321a | 2243 | if (setsrc) { |
0be6e7d7 JU |
2244 | if (p->family == AF_INET) { |
2245 | if (!nl_attr_put(&req->n, datalen, RTA_PREFSRC, | |
2246 | &src.ipv4, bytelen)) | |
2247 | return 0; | |
2248 | } else if (p->family == AF_INET6) { | |
2249 | if (!nl_attr_put(&req->n, datalen, RTA_PREFSRC, | |
2250 | &src.ipv6, bytelen)) | |
2251 | return 0; | |
2252 | } | |
7cdb1a84 MS |
2253 | if (IS_ZEBRA_DEBUG_KERNEL) |
2254 | zlog_debug("Setting source"); | |
2255 | } | |
7cdb1a84 MS |
2256 | } |
2257 | ||
2258 | /* If there is no useful nexthop then return. */ | |
2259 | if (nexthop_num == 0) { | |
2260 | if (IS_ZEBRA_DEBUG_KERNEL) | |
9266b315 | 2261 | zlog_debug("%s: No useful nexthop.", __func__); |
7cdb1a84 MS |
2262 | } |
2263 | ||
312a6bee | 2264 | return NLMSG_ALIGN(req->n.nlmsg_len); |
7cdb1a84 MS |
2265 | } |
2266 | ||
43b5cc5e | 2267 | int kernel_get_ipmr_sg_stats(struct zebra_vrf *zvrf, void *in) |
e3be0432 | 2268 | { |
5523c156 | 2269 | uint32_t actual_table; |
d62a17ae | 2270 | int suc = 0; |
2271 | struct mcast_route_data *mr = (struct mcast_route_data *)in; | |
bd8b9272 DS |
2272 | struct { |
2273 | struct nlmsghdr n; | |
2274 | struct ndmsg ndm; | |
2275 | char buf[256]; | |
2276 | } req; | |
e3be0432 | 2277 | |
d62a17ae | 2278 | mroute = mr; |
5895d33f | 2279 | struct zebra_ns *zns; |
bd8b9272 | 2280 | |
009f8ad5 | 2281 | zns = zvrf->zns; |
5605ecfc | 2282 | memset(&req, 0, sizeof(req)); |
bd8b9272 DS |
2283 | |
2284 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)); | |
2285 | req.n.nlmsg_flags = NLM_F_REQUEST; | |
2286 | req.n.nlmsg_pid = zns->netlink_cmd.snl.nl_pid; | |
2287 | ||
bd8b9272 DS |
2288 | req.n.nlmsg_type = RTM_GETROUTE; |
2289 | ||
a757997c JU |
2290 | nl_attr_put32(&req.n, sizeof(req), RTA_IIF, mroute->ifindex); |
2291 | nl_attr_put32(&req.n, sizeof(req), RTA_OIF, mroute->ifindex); | |
4d3b4b18 MR |
2292 | |
2293 | if (mroute->family == AF_INET) { | |
2294 | req.ndm.ndm_family = RTNL_FAMILY_IPMR; | |
2295 | nl_attr_put(&req.n, sizeof(req), RTA_SRC, | |
2296 | &mroute->src.ipaddr_v4, | |
2297 | sizeof(mroute->src.ipaddr_v4)); | |
2298 | nl_attr_put(&req.n, sizeof(req), RTA_DST, | |
2299 | &mroute->grp.ipaddr_v4, | |
2300 | sizeof(mroute->grp.ipaddr_v4)); | |
2301 | } else { | |
2302 | req.ndm.ndm_family = RTNL_FAMILY_IP6MR; | |
2303 | nl_attr_put(&req.n, sizeof(req), RTA_SRC, | |
2304 | &mroute->src.ipaddr_v6, | |
2305 | sizeof(mroute->src.ipaddr_v6)); | |
2306 | nl_attr_put(&req.n, sizeof(req), RTA_DST, | |
2307 | &mroute->grp.ipaddr_v6, | |
2308 | sizeof(mroute->grp.ipaddr_v6)); | |
2309 | } | |
2310 | ||
5523c156 DS |
2311 | /* |
2312 | * What? | |
2313 | * | |
2314 | * So during the namespace cleanup we started storing | |
2315 | * the zvrf table_id for the default table as RT_TABLE_MAIN | |
2316 | * which is what the normal routing table for ip routing is. | |
2317 | * This change caused this to break our lookups of sg data | |
2318 | * because prior to this change the zvrf->table_id was 0 | |
2319 | * and when the pim multicast kernel code saw a 0, | |
2320 | * it was auto-translated to RT_TABLE_DEFAULT. But since | |
2321 | * we are now passing in RT_TABLE_MAIN there is no auto-translation | |
2322 | * and the kernel goes screw you and the delicious cookies you | |
2323 | * are trying to give me. So now we have this little hack. | |
2324 | */ | |
2325 | actual_table = (zvrf->table_id == RT_TABLE_MAIN) ? RT_TABLE_DEFAULT : | |
2326 | zvrf->table_id; | |
a757997c | 2327 | nl_attr_put32(&req.n, sizeof(req), RTA_TABLE, actual_table); |
e3be0432 | 2328 | |
bd8b9272 | 2329 | suc = netlink_talk(netlink_route_change_read_multicast, &req.n, |
9bfadae8 | 2330 | &zns->netlink_cmd, zns, false); |
e3be0432 | 2331 | |
bd8b9272 | 2332 | mroute = NULL; |
d62a17ae | 2333 | return suc; |
e3be0432 DS |
2334 | } |
2335 | ||
8d03bc50 SW |
2336 | /* Char length to debug ID with */ |
2337 | #define ID_LENGTH 10 | |
2338 | ||
0be6e7d7 | 2339 | static bool _netlink_nexthop_build_group(struct nlmsghdr *n, size_t req_size, |
8d03bc50 | 2340 | uint32_t id, |
e22e8001 | 2341 | const struct nh_grp *z_grp, |
0c8215cb | 2342 | const uint8_t count) |
565ce0d3 | 2343 | { |
565ce0d3 | 2344 | struct nexthop_grp grp[count]; |
8d03bc50 SW |
2345 | /* Need space for max group size, "/", and null term */ |
2346 | char buf[(MULTIPATH_NUM * (ID_LENGTH + 1)) + 1]; | |
2347 | char buf1[ID_LENGTH + 2]; | |
2348 | ||
2349 | buf[0] = '\0'; | |
565ce0d3 SW |
2350 | |
2351 | memset(grp, 0, sizeof(grp)); | |
2352 | ||
2353 | if (count) { | |
0c8215cb | 2354 | for (int i = 0; i < count; i++) { |
e22e8001 | 2355 | grp[i].id = z_grp[i].id; |
df7fb580 | 2356 | grp[i].weight = z_grp[i].weight - 1; |
8d03bc50 SW |
2357 | |
2358 | if (IS_ZEBRA_DEBUG_KERNEL) { | |
2359 | if (i == 0) | |
2360 | snprintf(buf, sizeof(buf1), "group %u", | |
2361 | grp[i].id); | |
2362 | else { | |
2363 | snprintf(buf1, sizeof(buf1), "/%u", | |
2364 | grp[i].id); | |
2365 | strlcat(buf, buf1, sizeof(buf)); | |
2366 | } | |
2367 | } | |
565ce0d3 | 2368 | } |
0be6e7d7 JU |
2369 | if (!nl_attr_put(n, req_size, NHA_GROUP, grp, |
2370 | count * sizeof(*grp))) | |
2371 | return false; | |
565ce0d3 | 2372 | } |
8d03bc50 SW |
2373 | |
2374 | if (IS_ZEBRA_DEBUG_KERNEL) | |
2375 | zlog_debug("%s: ID (%u): %s", __func__, id, buf); | |
0be6e7d7 JU |
2376 | |
2377 | return true; | |
565ce0d3 SW |
2378 | } |
2379 | ||
f820d025 | 2380 | /** |
e9a1cd93 | 2381 | * Next hop packet encoding helper function. |
f820d025 | 2382 | * |
e9a1cd93 RZ |
2383 | * \param[in] cmd netlink command. |
2384 | * \param[in] ctx dataplane context (information snapshot). | |
2385 | * \param[out] buf buffer to hold the packet. | |
2386 | * \param[in] buflen amount of buffer bytes. | |
f820d025 | 2387 | * |
0be6e7d7 JU |
2388 | * \returns -1 on failure, 0 when the msg doesn't fit entirely in the buffer |
2389 | * otherwise the number of bytes written to buf. | |
f820d025 | 2390 | */ |
0be6e7d7 JU |
2391 | ssize_t netlink_nexthop_msg_encode(uint16_t cmd, |
2392 | const struct zebra_dplane_ctx *ctx, | |
2393 | void *buf, size_t buflen) | |
f820d025 | 2394 | { |
f820d025 SW |
2395 | struct { |
2396 | struct nlmsghdr n; | |
2397 | struct nhmsg nhm; | |
e9a1cd93 RZ |
2398 | char buf[]; |
2399 | } *req = buf; | |
f820d025 | 2400 | |
8d03bc50 SW |
2401 | mpls_lse_t out_lse[MPLS_MAX_LABELS]; |
2402 | char label_buf[256]; | |
2403 | int num_labels = 0; | |
72938edf SW |
2404 | uint32_t id = dplane_ctx_get_nhe_id(ctx); |
2405 | int type = dplane_ctx_get_nhe_type(ctx); | |
bdd085a8 MS |
2406 | struct rtattr *nest; |
2407 | uint16_t encap; | |
d4000d7b DS |
2408 | struct nlsock *nl = |
2409 | kernel_netlink_nlsock_lookup(dplane_ctx_get_ns_sock(ctx)); | |
72938edf SW |
2410 | |
2411 | if (!id) { | |
2412 | flog_err( | |
2413 | EC_ZEBRA_NHG_FIB_UPDATE, | |
2414 | "Failed trying to update a nexthop group in the kernel that does not have an ID"); | |
2415 | return -1; | |
2416 | } | |
81505946 | 2417 | |
6c67f41f SW |
2418 | /* |
2419 | * Nothing to do if the kernel doesn't support nexthop objects or | |
2420 | * we dont want to install this type of NHG | |
2421 | */ | |
72938edf SW |
2422 | if (!kernel_nexthops_supported()) { |
2423 | if (IS_ZEBRA_DEBUG_KERNEL || IS_ZEBRA_DEBUG_NHG) | |
2424 | zlog_debug( | |
2425 | "%s: nhg_id %u (%s): kernel nexthops not supported, ignoring", | |
2426 | __func__, id, zebra_route_string(type)); | |
6c67f41f | 2427 | return 0; |
72938edf SW |
2428 | } |
2429 | ||
2430 | if (proto_nexthops_only() && !is_proto_nhg(id, type)) { | |
2431 | if (IS_ZEBRA_DEBUG_KERNEL || IS_ZEBRA_DEBUG_NHG) | |
2432 | zlog_debug( | |
2433 | "%s: nhg_id %u (%s): proto-based nexthops only, ignoring", | |
2434 | __func__, id, zebra_route_string(type)); | |
2435 | return 0; | |
2436 | } | |
6c67f41f | 2437 | |
8d03bc50 SW |
2438 | label_buf[0] = '\0'; |
2439 | ||
0be6e7d7 JU |
2440 | if (buflen < sizeof(*req)) |
2441 | return 0; | |
2442 | ||
2443 | memset(req, 0, sizeof(*req)); | |
f820d025 | 2444 | |
e9a1cd93 RZ |
2445 | req->n.nlmsg_len = NLMSG_LENGTH(sizeof(struct nhmsg)); |
2446 | req->n.nlmsg_flags = NLM_F_CREATE | NLM_F_REQUEST; | |
9a1588c4 SW |
2447 | |
2448 | if (cmd == RTM_NEWNEXTHOP) | |
e9a1cd93 | 2449 | req->n.nlmsg_flags |= NLM_F_REPLACE; |
9a1588c4 | 2450 | |
e9a1cd93 | 2451 | req->n.nlmsg_type = cmd; |
d4000d7b | 2452 | req->n.nlmsg_pid = nl->snl.nl_pid; |
f820d025 | 2453 | |
e9a1cd93 | 2454 | req->nhm.nh_family = AF_UNSPEC; |
fec211ad | 2455 | /* TODO: Scope? */ |
f820d025 | 2456 | |
0be6e7d7 JU |
2457 | if (!nl_attr_put32(&req->n, buflen, NHA_ID, id)) |
2458 | return 0; | |
f820d025 SW |
2459 | |
2460 | if (cmd == RTM_NEWNEXTHOP) { | |
bf1626a6 MS |
2461 | /* |
2462 | * We distinguish between a "group", which is a collection | |
2463 | * of ids, and a singleton nexthop with an id. The | |
2464 | * group is installed as an id that just refers to a list of | |
2465 | * other ids. | |
2466 | */ | |
0be6e7d7 | 2467 | if (dplane_ctx_get_nhe_nh_grp_count(ctx)) { |
d52c949b | 2468 | if (!_netlink_nexthop_build_group( |
0be6e7d7 JU |
2469 | &req->n, buflen, id, |
2470 | dplane_ctx_get_nhe_nh_grp(ctx), | |
2471 | dplane_ctx_get_nhe_nh_grp_count(ctx))) | |
2472 | return 0; | |
2473 | } else { | |
0c8215cb SW |
2474 | const struct nexthop *nh = |
2475 | dplane_ctx_get_nhe_ng(ctx)->nexthop; | |
2476 | afi_t afi = dplane_ctx_get_nhe_afi(ctx); | |
e8b0e420 | 2477 | |
0c8215cb | 2478 | if (afi == AFI_IP) |
e9a1cd93 | 2479 | req->nhm.nh_family = AF_INET; |
0c8215cb | 2480 | else if (afi == AFI_IP6) |
e9a1cd93 | 2481 | req->nhm.nh_family = AF_INET6; |
f820d025 | 2482 | |
565ce0d3 | 2483 | switch (nh->type) { |
a6e6a6d8 | 2484 | case NEXTHOP_TYPE_IPV4: |
565ce0d3 | 2485 | case NEXTHOP_TYPE_IPV4_IFINDEX: |
0be6e7d7 JU |
2486 | if (!nl_attr_put(&req->n, buflen, NHA_GATEWAY, |
2487 | &nh->gate.ipv4, | |
2488 | IPV4_MAX_BYTELEN)) | |
2489 | return 0; | |
565ce0d3 | 2490 | break; |
a6e6a6d8 | 2491 | case NEXTHOP_TYPE_IPV6: |
565ce0d3 | 2492 | case NEXTHOP_TYPE_IPV6_IFINDEX: |
0be6e7d7 JU |
2493 | if (!nl_attr_put(&req->n, buflen, NHA_GATEWAY, |
2494 | &nh->gate.ipv6, | |
2495 | IPV6_MAX_BYTELEN)) | |
2496 | return 0; | |
565ce0d3 SW |
2497 | break; |
2498 | case NEXTHOP_TYPE_BLACKHOLE: | |
0be6e7d7 JU |
2499 | if (!nl_attr_put(&req->n, buflen, NHA_BLACKHOLE, |
2500 | NULL, 0)) | |
2501 | return 0; | |
8d03bc50 SW |
2502 | /* Blackhole shouldn't have anymore attributes |
2503 | */ | |
2504 | goto nexthop_done; | |
565ce0d3 SW |
2505 | case NEXTHOP_TYPE_IFINDEX: |
2506 | /* Don't need anymore info for this */ | |
2507 | break; | |
a6e6a6d8 SW |
2508 | } |
2509 | ||
2510 | if (!nh->ifindex) { | |
565ce0d3 SW |
2511 | flog_err( |
2512 | EC_ZEBRA_NHG_FIB_UPDATE, | |
2513 | "Context received for kernel nexthop update without an interface"); | |
2514 | return -1; | |
565ce0d3 SW |
2515 | } |
2516 | ||
0be6e7d7 JU |
2517 | if (!nl_attr_put32(&req->n, buflen, NHA_OIF, |
2518 | nh->ifindex)) | |
2519 | return 0; | |
8d03bc50 | 2520 | |
62d2ecb2 | 2521 | if (CHECK_FLAG(nh->flags, NEXTHOP_FLAG_ONLINK)) |
e9a1cd93 | 2522 | req->nhm.nh_flags |= RTNH_F_ONLINK; |
62d2ecb2 | 2523 | |
8d03bc50 SW |
2524 | num_labels = |
2525 | build_label_stack(nh->nh_label, out_lse, | |
2526 | label_buf, sizeof(label_buf)); | |
2527 | ||
2528 | if (num_labels) { | |
2529 | /* Set the BoS bit */ | |
2530 | out_lse[num_labels - 1] |= | |
2531 | htonl(1 << MPLS_LS_S_SHIFT); | |
2532 | ||
2533 | /* | |
2534 | * TODO: MPLS unsupported for now in kernel. | |
2535 | */ | |
e9a1cd93 | 2536 | if (req->nhm.nh_family == AF_MPLS) |
8d03bc50 | 2537 | goto nexthop_done; |
bdd085a8 MS |
2538 | |
2539 | encap = LWTUNNEL_ENCAP_MPLS; | |
2540 | if (!nl_attr_put16(&req->n, buflen, | |
2541 | NHA_ENCAP_TYPE, encap)) | |
2542 | return 0; | |
2543 | nest = nl_attr_nest(&req->n, buflen, NHA_ENCAP); | |
2544 | if (!nest) | |
2545 | return 0; | |
2546 | if (!nl_attr_put( | |
2547 | &req->n, buflen, MPLS_IPTUNNEL_DST, | |
2548 | &out_lse, | |
2549 | num_labels * sizeof(mpls_lse_t))) | |
2550 | return 0; | |
2551 | ||
2552 | nl_attr_nest_end(&req->n, nest); | |
8d03bc50 SW |
2553 | } |
2554 | ||
eab0f8f0 HS |
2555 | if (nh->nh_srv6) { |
2556 | if (nh->nh_srv6->seg6local_action != | |
2557 | ZEBRA_SEG6_LOCAL_ACTION_UNSPEC) { | |
2558 | uint32_t action; | |
2559 | uint16_t encap; | |
2560 | struct rtattr *nest; | |
2561 | const struct seg6local_context *ctx; | |
2562 | ||
2563 | req->nhm.nh_family = AF_INET6; | |
2564 | action = nh->nh_srv6->seg6local_action; | |
2565 | ctx = &nh->nh_srv6->seg6local_ctx; | |
2566 | encap = LWTUNNEL_ENCAP_SEG6_LOCAL; | |
2567 | if (!nl_attr_put(&req->n, buflen, | |
2568 | NHA_ENCAP_TYPE, | |
2569 | &encap, | |
2570 | sizeof(uint16_t))) | |
2571 | return 0; | |
8689b25a | 2572 | |
eab0f8f0 HS |
2573 | nest = nl_attr_nest(&req->n, buflen, |
2574 | NHA_ENCAP | NLA_F_NESTED); | |
2575 | if (!nest) | |
2576 | return 0; | |
52026569 | 2577 | |
eab0f8f0 HS |
2578 | switch (action) { |
2579 | case SEG6_LOCAL_ACTION_END: | |
2580 | if (!nl_attr_put32( | |
2581 | &req->n, buflen, | |
52026569 HS |
2582 | SEG6_LOCAL_ACTION, |
2583 | SEG6_LOCAL_ACTION_END)) | |
eab0f8f0 HS |
2584 | return 0; |
2585 | break; | |
2586 | case SEG6_LOCAL_ACTION_END_X: | |
2587 | if (!nl_attr_put32( | |
2588 | &req->n, buflen, | |
52026569 HS |
2589 | SEG6_LOCAL_ACTION, |
2590 | SEG6_LOCAL_ACTION_END_X)) | |
eab0f8f0 HS |
2591 | return 0; |
2592 | if (!nl_attr_put( | |
2593 | &req->n, buflen, | |
8689b25a | 2594 | SEG6_LOCAL_NH6, &ctx->nh6, |
52026569 | 2595 | sizeof(struct in6_addr))) |
eab0f8f0 HS |
2596 | return 0; |
2597 | break; | |
2598 | case SEG6_LOCAL_ACTION_END_T: | |
2599 | if (!nl_attr_put32( | |
2600 | &req->n, buflen, | |
52026569 HS |
2601 | SEG6_LOCAL_ACTION, |
2602 | SEG6_LOCAL_ACTION_END_T)) | |
eab0f8f0 HS |
2603 | return 0; |
2604 | if (!nl_attr_put32( | |
2605 | &req->n, buflen, | |
52026569 HS |
2606 | SEG6_LOCAL_TABLE, |
2607 | ctx->table)) | |
eab0f8f0 HS |
2608 | return 0; |
2609 | break; | |
2610 | case SEG6_LOCAL_ACTION_END_DX4: | |
2611 | if (!nl_attr_put32( | |
2612 | &req->n, buflen, | |
52026569 HS |
2613 | SEG6_LOCAL_ACTION, |
2614 | SEG6_LOCAL_ACTION_END_DX4)) | |
eab0f8f0 HS |
2615 | return 0; |
2616 | if (!nl_attr_put( | |
2617 | &req->n, buflen, | |
8689b25a | 2618 | SEG6_LOCAL_NH4, &ctx->nh4, |
52026569 | 2619 | sizeof(struct in_addr))) |
eab0f8f0 HS |
2620 | return 0; |
2621 | break; | |
2622 | case SEG6_LOCAL_ACTION_END_DT6: | |
2623 | if (!nl_attr_put32( | |
2624 | &req->n, buflen, | |
52026569 HS |
2625 | SEG6_LOCAL_ACTION, |
2626 | SEG6_LOCAL_ACTION_END_DT6)) | |
eab0f8f0 HS |
2627 | return 0; |
2628 | if (!nl_attr_put32( | |
2629 | &req->n, buflen, | |
52026569 HS |
2630 | SEG6_LOCAL_TABLE, |
2631 | ctx->table)) | |
eab0f8f0 HS |
2632 | return 0; |
2633 | break; | |
7eab60a7 RS |
2634 | case SEG6_LOCAL_ACTION_END_DT4: |
2635 | if (!nl_attr_put32( | |
2636 | &req->n, buflen, | |
2637 | SEG6_LOCAL_ACTION, | |
2638 | SEG6_LOCAL_ACTION_END_DT4)) | |
2639 | return 0; | |
2640 | if (!nl_attr_put32( | |
2641 | &req->n, buflen, | |
2642 | SEG6_LOCAL_VRFTABLE, | |
2643 | ctx->table)) | |
2644 | return 0; | |
2645 | break; | |
eab0f8f0 HS |
2646 | default: |
2647 | zlog_err("%s: unsupport seg6local behaviour action=%u", | |
2648 | __func__, action); | |
0a543b79 | 2649 | return 0; |
eab0f8f0 HS |
2650 | } |
2651 | nl_attr_nest_end(&req->n, nest); | |
8689b25a | 2652 | } |
8689b25a | 2653 | |
eab0f8f0 HS |
2654 | if (!sid_zero(&nh->nh_srv6->seg6_segs)) { |
2655 | char tun_buf[4096]; | |
2656 | ssize_t tun_len; | |
2657 | struct rtattr *nest; | |
76fb7ae4 | 2658 | |
eab0f8f0 HS |
2659 | if (!nl_attr_put16(&req->n, buflen, |
2660 | NHA_ENCAP_TYPE, | |
2661 | LWTUNNEL_ENCAP_SEG6)) | |
2662 | return 0; | |
2663 | nest = nl_attr_nest(&req->n, buflen, | |
2664 | NHA_ENCAP | NLA_F_NESTED); | |
2665 | if (!nest) | |
2666 | return 0; | |
2667 | tun_len = fill_seg6ipt_encap(tun_buf, | |
2668 | sizeof(tun_buf), | |
2669 | &nh->nh_srv6->seg6_segs); | |
2670 | if (tun_len < 0) | |
2671 | return 0; | |
2672 | if (!nl_attr_put(&req->n, buflen, | |
2673 | SEG6_IPTUNNEL_SRH, | |
2674 | tun_buf, tun_len)) | |
2675 | return 0; | |
2676 | nl_attr_nest_end(&req->n, nest); | |
2677 | } | |
76fb7ae4 HS |
2678 | } |
2679 | ||
bf1626a6 MS |
2680 | nexthop_done: |
2681 | ||
2682 | if (IS_ZEBRA_DEBUG_KERNEL) | |
2c77ddee DS |
2683 | zlog_debug("%s: ID (%u): %pNHv(%d) vrf %s(%u) %s ", |
2684 | __func__, id, nh, nh->ifindex, | |
bd47f3a3 JU |
2685 | vrf_id_to_name(nh->vrf_id), |
2686 | nh->vrf_id, label_buf); | |
bdd085a8 | 2687 | } |
f820d025 | 2688 | |
bdd085a8 | 2689 | req->nhm.nh_protocol = zebra2proto(type); |
f820d025 | 2690 | |
f820d025 SW |
2691 | } else if (cmd != RTM_DELNEXTHOP) { |
2692 | flog_err( | |
2693 | EC_ZEBRA_NHG_FIB_UPDATE, | |
2694 | "Nexthop group kernel update command (%d) does not exist", | |
2695 | cmd); | |
2696 | return -1; | |
2697 | } | |
2698 | ||
9266b315 RZ |
2699 | if (IS_ZEBRA_DEBUG_KERNEL) |
2700 | zlog_debug("%s: %s, id=%u", __func__, nl_msg_type_to_str(cmd), | |
2701 | id); | |
f820d025 | 2702 | |
e9a1cd93 | 2703 | return NLMSG_ALIGN(req->n.nlmsg_len); |
f820d025 SW |
2704 | } |
2705 | ||
67e3369e JU |
2706 | static ssize_t netlink_nexthop_msg_encoder(struct zebra_dplane_ctx *ctx, |
2707 | void *buf, size_t buflen) | |
f820d025 | 2708 | { |
bf1626a6 | 2709 | enum dplane_op_e op; |
98cda54a | 2710 | int cmd = 0; |
f820d025 | 2711 | |
bf1626a6 MS |
2712 | op = dplane_ctx_get_op(ctx); |
2713 | if (op == DPLANE_OP_NH_INSTALL || op == DPLANE_OP_NH_UPDATE) | |
f820d025 | 2714 | cmd = RTM_NEWNEXTHOP; |
bf1626a6 MS |
2715 | else if (op == DPLANE_OP_NH_DELETE) |
2716 | cmd = RTM_DELNEXTHOP; | |
2717 | else { | |
2718 | flog_err(EC_ZEBRA_NHG_FIB_UPDATE, | |
2719 | "Context received for kernel nexthop update with incorrect OP code (%u)", | |
2720 | op); | |
67e3369e | 2721 | return -1; |
f820d025 SW |
2722 | } |
2723 | ||
67e3369e JU |
2724 | return netlink_nexthop_msg_encode(cmd, ctx, buf, buflen); |
2725 | } | |
2726 | ||
67e3369e JU |
2727 | enum netlink_msg_status |
2728 | netlink_put_nexthop_update_msg(struct nl_batch *bth, | |
2729 | struct zebra_dplane_ctx *ctx) | |
2730 | { | |
e9a1cd93 RZ |
2731 | /* Nothing to do if the kernel doesn't support nexthop objects */ |
2732 | if (!kernel_nexthops_supported()) | |
67e3369e | 2733 | return FRR_NETLINK_SUCCESS; |
e9a1cd93 | 2734 | |
67e3369e JU |
2735 | return netlink_batch_add_msg(bth, ctx, netlink_nexthop_msg_encoder, |
2736 | false); | |
2737 | } | |
f820d025 | 2738 | |
67e3369e JU |
2739 | static ssize_t netlink_newroute_msg_encoder(struct zebra_dplane_ctx *ctx, |
2740 | void *buf, size_t buflen) | |
2741 | { | |
2742 | return netlink_route_multipath_msg_encode(RTM_NEWROUTE, ctx, buf, | |
2743 | buflen, false, false); | |
f820d025 SW |
2744 | } |
2745 | ||
67e3369e JU |
2746 | static ssize_t netlink_delroute_msg_encoder(struct zebra_dplane_ctx *ctx, |
2747 | void *buf, size_t buflen) | |
2748 | { | |
2749 | return netlink_route_multipath_msg_encode(RTM_DELROUTE, ctx, buf, | |
2750 | buflen, false, false); | |
2751 | } | |
2752 | ||
2753 | enum netlink_msg_status | |
2754 | netlink_put_route_update_msg(struct nl_batch *bth, struct zebra_dplane_ctx *ctx) | |
7cdb1a84 | 2755 | { |
67e3369e | 2756 | int cmd; |
7cdb1a84 MS |
2757 | const struct prefix *p = dplane_ctx_get_dest(ctx); |
2758 | ||
2759 | if (dplane_ctx_get_op(ctx) == DPLANE_OP_ROUTE_DELETE) { | |
2760 | cmd = RTM_DELROUTE; | |
2761 | } else if (dplane_ctx_get_op(ctx) == DPLANE_OP_ROUTE_INSTALL) { | |
2762 | cmd = RTM_NEWROUTE; | |
2763 | } else if (dplane_ctx_get_op(ctx) == DPLANE_OP_ROUTE_UPDATE) { | |
2764 | ||
2765 | if (p->family == AF_INET || v6_rr_semantics) { | |
2766 | /* Single 'replace' operation */ | |
fe5f21af DS |
2767 | |
2768 | /* | |
2769 | * With route replace semantics in place | |
2770 | * for v4 routes and the new route is a system | |
2771 | * route we do not install anything. | |
2772 | * The problem here is that the new system | |
2773 | * route should cause us to withdraw from | |
2774 | * the kernel the old non-system route | |
2775 | */ | |
67e3369e JU |
2776 | if (RSYSTEM_ROUTE(dplane_ctx_get_type(ctx)) |
2777 | && !RSYSTEM_ROUTE(dplane_ctx_get_old_type(ctx))) | |
6b390b3c | 2778 | return netlink_batch_add_msg( |
67e3369e JU |
2779 | bth, ctx, netlink_delroute_msg_encoder, |
2780 | true); | |
7cdb1a84 MS |
2781 | } else { |
2782 | /* | |
2783 | * So v6 route replace semantics are not in | |
2784 | * the kernel at this point as I understand it. | |
2785 | * so let's do a delete then an add. | |
2786 | * In the future once v6 route replace semantics | |
2787 | * are in we can figure out what to do here to | |
2788 | * allow working with old and new kernels. | |
2789 | * | |
2790 | * I'm also intentionally ignoring the failure case | |
2791 | * of the route delete. If that happens yeah we're | |
2792 | * screwed. | |
2793 | */ | |
67e3369e JU |
2794 | if (!RSYSTEM_ROUTE(dplane_ctx_get_old_type(ctx))) |
2795 | netlink_batch_add_msg( | |
2796 | bth, ctx, netlink_delroute_msg_encoder, | |
2797 | true); | |
7cdb1a84 MS |
2798 | } |
2799 | ||
67e3369e JU |
2800 | cmd = RTM_NEWROUTE; |
2801 | } else | |
2802 | return FRR_NETLINK_ERROR; | |
7cdb1a84 | 2803 | |
67e3369e JU |
2804 | if (RSYSTEM_ROUTE(dplane_ctx_get_type(ctx))) |
2805 | return FRR_NETLINK_SUCCESS; | |
0be6e7d7 | 2806 | |
67e3369e JU |
2807 | return netlink_batch_add_msg(bth, ctx, |
2808 | cmd == RTM_NEWROUTE | |
2809 | ? netlink_newroute_msg_encoder | |
2810 | : netlink_delroute_msg_encoder, | |
2811 | false); | |
2812 | } | |
7cdb1a84 | 2813 | |
d9f5b2f5 SW |
2814 | /** |
2815 | * netlink_nexthop_process_nh() - Parse the gatway/if info from a new nexthop | |
2816 | * | |
2817 | * @tb: Netlink RTA data | |
2818 | * @family: Address family in the nhmsg | |
8c0a24c1 | 2819 | * @ifp: Interface connected - this should be NULL, we fill it in |
d9f5b2f5 SW |
2820 | * @ns_id: Namspace id |
2821 | * | |
2822 | * Return: New nexthop | |
2823 | */ | |
e22e8001 SW |
2824 | static struct nexthop netlink_nexthop_process_nh(struct rtattr **tb, |
2825 | unsigned char family, | |
2826 | struct interface **ifp, | |
2827 | ns_id_t ns_id) | |
d9f5b2f5 | 2828 | { |
e22e8001 | 2829 | struct nexthop nh = {}; |
d9f5b2f5 | 2830 | void *gate = NULL; |
8e401b25 | 2831 | enum nexthop_types_t type = 0; |
e22e8001 SW |
2832 | int if_index = 0; |
2833 | size_t sz = 0; | |
7134ba70 | 2834 | struct interface *ifp_lookup; |
d9f5b2f5 SW |
2835 | |
2836 | if_index = *(int *)RTA_DATA(tb[NHA_OIF]); | |
2837 | ||
8e401b25 | 2838 | |
d9f5b2f5 SW |
2839 | if (tb[NHA_GATEWAY]) { |
2840 | switch (family) { | |
2841 | case AF_INET: | |
8e401b25 | 2842 | type = NEXTHOP_TYPE_IPV4_IFINDEX; |
d9f5b2f5 SW |
2843 | sz = 4; |
2844 | break; | |
2845 | case AF_INET6: | |
8e401b25 | 2846 | type = NEXTHOP_TYPE_IPV6_IFINDEX; |
d9f5b2f5 SW |
2847 | sz = 16; |
2848 | break; | |
2849 | default: | |
2850 | flog_warn( | |
2851 | EC_ZEBRA_BAD_NHG_MESSAGE, | |
c4239c05 | 2852 | "Nexthop gateway with bad address family (%d) received from kernel", |
d9f5b2f5 | 2853 | family); |
e22e8001 | 2854 | return nh; |
d9f5b2f5 SW |
2855 | } |
2856 | gate = RTA_DATA(tb[NHA_GATEWAY]); | |
e22e8001 | 2857 | } else |
8e401b25 | 2858 | type = NEXTHOP_TYPE_IFINDEX; |
d9f5b2f5 | 2859 | |
8e401b25 | 2860 | if (type) |
e22e8001 | 2861 | nh.type = type; |
8e401b25 SW |
2862 | |
2863 | if (gate) | |
e22e8001 | 2864 | memcpy(&(nh.gate), gate, sz); |
8e401b25 SW |
2865 | |
2866 | if (if_index) | |
e22e8001 | 2867 | nh.ifindex = if_index; |
8e401b25 | 2868 | |
7134ba70 DS |
2869 | ifp_lookup = |
2870 | if_lookup_by_index_per_ns(zebra_ns_lookup(ns_id), nh.ifindex); | |
2871 | ||
e22e8001 | 2872 | if (ifp) |
7134ba70 DS |
2873 | *ifp = ifp_lookup; |
2874 | if (ifp_lookup) | |
096f7609 | 2875 | nh.vrf_id = ifp_lookup->vrf->vrf_id; |
e22e8001 | 2876 | else { |
d9f5b2f5 SW |
2877 | flog_warn( |
2878 | EC_ZEBRA_UNKNOWN_INTERFACE, | |
2879 | "%s: Unknown nexthop interface %u received, defaulting to VRF_DEFAULT", | |
15569c58 | 2880 | __func__, nh.ifindex); |
d9f5b2f5 | 2881 | |
e22e8001 | 2882 | nh.vrf_id = VRF_DEFAULT; |
d9f5b2f5 SW |
2883 | } |
2884 | ||
2885 | if (tb[NHA_ENCAP] && tb[NHA_ENCAP_TYPE]) { | |
2886 | uint16_t encap_type = *(uint16_t *)RTA_DATA(tb[NHA_ENCAP_TYPE]); | |
2887 | int num_labels = 0; | |
6e728764 | 2888 | |
d9f5b2f5 SW |
2889 | mpls_label_t labels[MPLS_MAX_LABELS] = {0}; |
2890 | ||
e22e8001 | 2891 | if (encap_type == LWTUNNEL_ENCAP_MPLS) |
d9f5b2f5 | 2892 | num_labels = parse_encap_mpls(tb[NHA_ENCAP], labels); |
d9f5b2f5 | 2893 | |
e22e8001 SW |
2894 | if (num_labels) |
2895 | nexthop_add_labels(&nh, ZEBRA_LSP_STATIC, num_labels, | |
d9f5b2f5 | 2896 | labels); |
d9f5b2f5 SW |
2897 | } |
2898 | ||
2899 | return nh; | |
2900 | } | |
2901 | ||
85f5e761 | 2902 | static int netlink_nexthop_process_group(struct rtattr **tb, |
5a935f79 | 2903 | struct nh_grp *z_grp, int z_grp_size) |
d9f5b2f5 | 2904 | { |
e22e8001 SW |
2905 | uint8_t count = 0; |
2906 | /* linux/nexthop.h group struct */ | |
d9f5b2f5 SW |
2907 | struct nexthop_grp *n_grp = NULL; |
2908 | ||
85f5e761 | 2909 | n_grp = (struct nexthop_grp *)RTA_DATA(tb[NHA_GROUP]); |
d9f5b2f5 SW |
2910 | count = (RTA_PAYLOAD(tb[NHA_GROUP]) / sizeof(*n_grp)); |
2911 | ||
2912 | if (!count || (count * sizeof(*n_grp)) != RTA_PAYLOAD(tb[NHA_GROUP])) { | |
2913 | flog_warn(EC_ZEBRA_BAD_NHG_MESSAGE, | |
2914 | "Invalid nexthop group received from the kernel"); | |
85f5e761 | 2915 | return count; |
d9f5b2f5 SW |
2916 | } |
2917 | ||
5a935f79 | 2918 | for (int i = 0; ((i < count) && (i < z_grp_size)); i++) { |
e22e8001 | 2919 | z_grp[i].id = n_grp[i].id; |
df7fb580 | 2920 | z_grp[i].weight = n_grp[i].weight + 1; |
85f5e761 | 2921 | } |
d9f5b2f5 SW |
2922 | return count; |
2923 | } | |
2924 | ||
2925 | /** | |
2926 | * netlink_nexthop_change() - Read in change about nexthops from the kernel | |
2927 | * | |
2928 | * @h: Netlink message header | |
2929 | * @ns_id: Namspace id | |
2930 | * @startup: Are we reading under startup conditions? | |
2931 | * | |
2932 | * Return: Result status | |
2933 | */ | |
2934 | int netlink_nexthop_change(struct nlmsghdr *h, ns_id_t ns_id, int startup) | |
2935 | { | |
2936 | int len; | |
2937 | /* nexthop group id */ | |
2938 | uint32_t id; | |
2939 | unsigned char family; | |
38e40db1 | 2940 | int type; |
e8b0e420 | 2941 | afi_t afi = AFI_UNSPEC; |
946de1b9 | 2942 | vrf_id_t vrf_id = VRF_DEFAULT; |
8c0a24c1 | 2943 | struct interface *ifp = NULL; |
d9f5b2f5 | 2944 | struct nhmsg *nhm = NULL; |
e22e8001 SW |
2945 | struct nexthop nh = {}; |
2946 | struct nh_grp grp[MULTIPATH_NUM] = {}; | |
85f5e761 | 2947 | /* Count of nexthops in group array */ |
e22e8001 | 2948 | uint8_t grp_count = 0; |
e22e8001 | 2949 | struct rtattr *tb[NHA_MAX + 1] = {}; |
d9f5b2f5 | 2950 | |
1d80c209 DS |
2951 | frrtrace(3, frr_zebra, netlink_nexthop_change, h, ns_id, startup); |
2952 | ||
d9f5b2f5 SW |
2953 | nhm = NLMSG_DATA(h); |
2954 | ||
88cafda7 DS |
2955 | if (ns_id) |
2956 | vrf_id = ns_id; | |
2957 | ||
d9f5b2f5 SW |
2958 | if (startup && h->nlmsg_type != RTM_NEWNEXTHOP) |
2959 | return 0; | |
2960 | ||
2961 | len = h->nlmsg_len - NLMSG_LENGTH(sizeof(struct nhmsg)); | |
2962 | if (len < 0) { | |
2963 | zlog_warn( | |
2964 | "%s: Message received from netlink is of a broken size %d %zu", | |
15569c58 | 2965 | __func__, h->nlmsg_len, |
d9f5b2f5 SW |
2966 | (size_t)NLMSG_LENGTH(sizeof(struct nhmsg))); |
2967 | return -1; | |
2968 | } | |
2969 | ||
6e1e2e8d DS |
2970 | netlink_parse_rtattr_flags(tb, NHA_MAX, RTM_NHA(nhm), len, |
2971 | NLA_F_NESTED); | |
d9f5b2f5 SW |
2972 | |
2973 | ||
2974 | if (!tb[NHA_ID]) { | |
2975 | flog_warn( | |
2976 | EC_ZEBRA_BAD_NHG_MESSAGE, | |
2977 | "Nexthop group without an ID received from the kernel"); | |
2978 | return -1; | |
2979 | } | |
2980 | ||
2981 | /* We use the ID key'd nhg table for kernel updates */ | |
2982 | id = *((uint32_t *)RTA_DATA(tb[NHA_ID])); | |
d9f5b2f5 | 2983 | |
506efd37 AK |
2984 | if (zebra_evpn_mh_is_fdb_nh(id)) { |
2985 | /* If this is a L2 NH just ignore it */ | |
2986 | if (IS_ZEBRA_DEBUG_KERNEL || IS_ZEBRA_DEBUG_EVPN_MH_NH) { | |
2987 | zlog_debug("Ignore kernel update (%u) for fdb-nh 0x%x", | |
2988 | h->nlmsg_type, id); | |
2989 | } | |
2990 | return 0; | |
2991 | } | |
2992 | ||
e8b0e420 | 2993 | family = nhm->nh_family; |
e8b0e420 SW |
2994 | afi = family2afi(family); |
2995 | ||
38e40db1 SW |
2996 | type = proto2zebra(nhm->nh_protocol, 0, true); |
2997 | ||
fdee485a SW |
2998 | if (IS_ZEBRA_DEBUG_KERNEL) |
2999 | zlog_debug("%s ID (%u) %s NS %u", | |
3000 | nl_msg_type_to_str(h->nlmsg_type), id, | |
3001 | nl_family_to_str(family), ns_id); | |
3002 | ||
3003 | ||
d9f5b2f5 SW |
3004 | if (h->nlmsg_type == RTM_NEWNEXTHOP) { |
3005 | if (tb[NHA_GROUP]) { | |
3006 | /** | |
3007 | * If this is a group message its only going to have | |
3008 | * an array of nexthop IDs associated with it | |
3009 | */ | |
5a935f79 SW |
3010 | grp_count = netlink_nexthop_process_group( |
3011 | tb, grp, array_size(grp)); | |
85f5e761 SW |
3012 | } else { |
3013 | if (tb[NHA_BLACKHOLE]) { | |
3014 | /** | |
3015 | * This nexthop is just for blackhole-ing | |
3016 | * traffic, it should not have an OIF, GATEWAY, | |
3017 | * or ENCAP | |
3018 | */ | |
e22e8001 SW |
3019 | nh.type = NEXTHOP_TYPE_BLACKHOLE; |
3020 | nh.bh_type = BLACKHOLE_UNSPEC; | |
3021 | } else if (tb[NHA_OIF]) | |
85f5e761 SW |
3022 | /** |
3023 | * This is a true new nexthop, so we need | |
3024 | * to parse the gateway and device info | |
3025 | */ | |
3026 | nh = netlink_nexthop_process_nh(tb, family, | |
3027 | &ifp, ns_id); | |
e22e8001 SW |
3028 | else { |
3029 | ||
8e401b25 SW |
3030 | flog_warn( |
3031 | EC_ZEBRA_BAD_NHG_MESSAGE, | |
3032 | "Invalid Nexthop message received from the kernel with ID (%u)", | |
3033 | id); | |
3034 | return -1; | |
3035 | } | |
e22e8001 SW |
3036 | SET_FLAG(nh.flags, NEXTHOP_FLAG_ACTIVE); |
3037 | if (nhm->nh_flags & RTNH_F_ONLINK) | |
3038 | SET_FLAG(nh.flags, NEXTHOP_FLAG_ONLINK); | |
3039 | vrf_id = nh.vrf_id; | |
d9f5b2f5 SW |
3040 | } |
3041 | ||
38e40db1 SW |
3042 | if (zebra_nhg_kernel_find(id, &nh, grp, grp_count, vrf_id, afi, |
3043 | type, startup)) | |
e22e8001 | 3044 | return -1; |
8e401b25 | 3045 | |
9a1588c4 | 3046 | } else if (h->nlmsg_type == RTM_DELNEXTHOP) |
88cafda7 | 3047 | zebra_nhg_kernel_del(id, vrf_id); |
d9f5b2f5 | 3048 | |
d9f5b2f5 SW |
3049 | return 0; |
3050 | } | |
3051 | ||
3052 | /** | |
3053 | * netlink_request_nexthop() - Request nextop information from the kernel | |
3054 | * @zns: Zebra namespace | |
3055 | * @family: AF_* netlink family | |
3056 | * @type: RTM_* route type | |
3057 | * | |
3058 | * Return: Result status | |
3059 | */ | |
3060 | static int netlink_request_nexthop(struct zebra_ns *zns, int family, int type) | |
3061 | { | |
3062 | struct { | |
3063 | struct nlmsghdr n; | |
3064 | struct nhmsg nhm; | |
3065 | } req; | |
3066 | ||
3067 | /* Form the request, specifying filter (rtattr) if needed. */ | |
3068 | memset(&req, 0, sizeof(req)); | |
3069 | req.n.nlmsg_type = type; | |
3070 | req.n.nlmsg_flags = NLM_F_ROOT | NLM_F_MATCH | NLM_F_REQUEST; | |
3071 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct nhmsg)); | |
3072 | req.nhm.nh_family = family; | |
3073 | ||
fd3f8e52 | 3074 | return netlink_request(&zns->netlink_cmd, &req); |
d9f5b2f5 SW |
3075 | } |
3076 | ||
7d5bb02b | 3077 | |
d9f5b2f5 SW |
3078 | /** |
3079 | * netlink_nexthop_read() - Nexthop read function using netlink interface | |
3080 | * | |
3081 | * @zns: Zebra name space | |
3082 | * | |
3083 | * Return: Result status | |
3084 | * Only called at bootstrap time. | |
3085 | */ | |
3086 | int netlink_nexthop_read(struct zebra_ns *zns) | |
3087 | { | |
3088 | int ret; | |
3089 | struct zebra_dplane_info dp_info; | |
3090 | ||
3091 | zebra_dplane_info_from_zns(&dp_info, zns, true /*is_cmd*/); | |
3092 | ||
3093 | /* Get nexthop objects */ | |
3094 | ret = netlink_request_nexthop(zns, AF_UNSPEC, RTM_GETNEXTHOP); | |
3095 | if (ret < 0) | |
3096 | return ret; | |
3097 | ret = netlink_parse_info(netlink_nexthop_change, &zns->netlink_cmd, | |
9bfadae8 | 3098 | &dp_info, 0, true); |
81505946 SW |
3099 | |
3100 | if (!ret) | |
3101 | /* If we succesfully read in nexthop objects, | |
3102 | * this kernel must support them. | |
3103 | */ | |
3104 | supports_nh = true; | |
7c99d51b MS |
3105 | if (IS_ZEBRA_DEBUG_KERNEL || IS_ZEBRA_DEBUG_NHG) |
3106 | zlog_debug("Nexthop objects %ssupported on this kernel", | |
3107 | supports_nh ? "" : "not "); | |
090ee856 DS |
3108 | |
3109 | zebra_router_set_supports_nhgs(supports_nh); | |
81505946 | 3110 | |
60e0eaee | 3111 | return ret; |
d9f5b2f5 SW |
3112 | } |
3113 | ||
3114 | ||
05657ec2 PG |
3115 | int kernel_neigh_update(int add, int ifindex, void *addr, char *lla, int llalen, |
3116 | ns_id_t ns_id, uint8_t family, bool permanent) | |
6b8a5694 | 3117 | { |
d62a17ae | 3118 | return netlink_neigh_update(add ? RTM_NEWNEIGH : RTM_DELNEIGH, ifindex, |
05657ec2 PG |
3119 | addr, lla, llalen, ns_id, family, permanent, |
3120 | RTPROT_ZEBRA); | |
6b8a5694 | 3121 | } |
718e3744 | 3122 | |
340845e2 | 3123 | /** |
0be6e7d7 JU |
3124 | * netlink_neigh_update_msg_encode() - Common helper api for encoding |
3125 | * evpn neighbor update as netlink messages using dataplane context object. | |
bbd4285b | 3126 | * Here, a neighbor refers to a bridge forwarding database entry for |
3127 | * either unicast forwarding or head-end replication or an IP neighbor | |
3128 | * entry. | |
340845e2 JU |
3129 | * @ctx: Dataplane context |
3130 | * @cmd: Netlink command (RTM_NEWNEIGH or RTM_DELNEIGH) | |
0a27a2fe PG |
3131 | * @lla: A pointer to neighbor cache link layer address |
3132 | * @llalen: Length of the pointer to neighbor cache link layer | |
3133 | * address | |
340845e2 | 3134 | * @ip: A neighbor cache n/w layer destination address |
bbd4285b | 3135 | * In the case of bridge FDB, this represnts the remote |
3136 | * VTEP IP. | |
340845e2 JU |
3137 | * @replace_obj: Whether NEW request should replace existing object or |
3138 | * add to the end of the list | |
3139 | * @family: AF_* netlink family | |
3140 | * @type: RTN_* route type | |
3141 | * @flags: NTF_* flags | |
3142 | * @state: NUD_* states | |
d4d4ec1c RZ |
3143 | * @data: data buffer pointer |
3144 | * @datalen: total amount of data buffer space | |
0a27a2fe | 3145 | * @protocol: protocol information |
340845e2 | 3146 | * |
0be6e7d7 JU |
3147 | * Return: 0 when the msg doesn't fit entirely in the buffer |
3148 | * otherwise the number of bytes written to buf. | |
13d60d35 | 3149 | */ |
0be6e7d7 | 3150 | static ssize_t netlink_neigh_update_msg_encode( |
0a27a2fe PG |
3151 | const struct zebra_dplane_ctx *ctx, int cmd, const void *lla, |
3152 | int llalen, const struct ipaddr *ip, bool replace_obj, uint8_t family, | |
3153 | uint8_t type, uint8_t flags, uint16_t state, uint32_t nhg_id, bool nfy, | |
ccd187cd | 3154 | uint8_t nfy_flags, bool ext, uint32_t ext_flags, void *data, |
0a27a2fe | 3155 | size_t datalen, uint8_t protocol) |
13d60d35 | 3156 | { |
d62a17ae | 3157 | struct { |
3158 | struct nlmsghdr n; | |
3159 | struct ndmsg ndm; | |
d4d4ec1c RZ |
3160 | char buf[]; |
3161 | } *req = data; | |
340845e2 JU |
3162 | int ipa_len; |
3163 | enum dplane_op_e op; | |
d62a17ae | 3164 | |
0be6e7d7 JU |
3165 | if (datalen < sizeof(*req)) |
3166 | return 0; | |
45c80fbd | 3167 | memset(req, 0, sizeof(*req)); |
d62a17ae | 3168 | |
340845e2 JU |
3169 | op = dplane_ctx_get_op(ctx); |
3170 | ||
d4d4ec1c RZ |
3171 | req->n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)); |
3172 | req->n.nlmsg_flags = NLM_F_REQUEST; | |
d62a17ae | 3173 | if (cmd == RTM_NEWNEIGH) |
d4d4ec1c | 3174 | req->n.nlmsg_flags |= |
340845e2 JU |
3175 | NLM_F_CREATE |
3176 | | (replace_obj ? NLM_F_REPLACE : NLM_F_APPEND); | |
d4d4ec1c RZ |
3177 | req->n.nlmsg_type = cmd; |
3178 | req->ndm.ndm_family = family; | |
3179 | req->ndm.ndm_type = type; | |
3180 | req->ndm.ndm_state = state; | |
3181 | req->ndm.ndm_flags = flags; | |
3182 | req->ndm.ndm_ifindex = dplane_ctx_get_ifindex(ctx); | |
d62a17ae | 3183 | |
45c80fbd | 3184 | if (!nl_attr_put(&req->n, datalen, NDA_PROTOCOL, &protocol, |
0be6e7d7 JU |
3185 | sizeof(protocol))) |
3186 | return 0; | |
3187 | ||
0a27a2fe PG |
3188 | if (lla) { |
3189 | if (!nl_attr_put(&req->n, datalen, NDA_LLADDR, lla, llalen)) | |
0be6e7d7 JU |
3190 | return 0; |
3191 | } | |
13d60d35 | 3192 | |
f188e68e | 3193 | if (nfy) { |
4bcdb608 NA |
3194 | struct rtattr *nest; |
3195 | ||
3196 | nest = nl_attr_nest(&req->n, datalen, | |
3197 | NDA_FDB_EXT_ATTRS | NLA_F_NESTED); | |
3198 | if (!nest) | |
3199 | return 0; | |
3200 | ||
3201 | if (!nl_attr_put(&req->n, datalen, NFEA_ACTIVITY_NOTIFY, | |
3202 | &nfy_flags, sizeof(nfy_flags))) | |
f188e68e | 3203 | return 0; |
4bcdb608 NA |
3204 | if (!nl_attr_put(&req->n, datalen, NFEA_DONT_REFRESH, NULL, 0)) |
3205 | return 0; | |
3206 | ||
3207 | nl_attr_nest_end(&req->n, nest); | |
f188e68e | 3208 | } |
506efd37 | 3209 | |
4bcdb608 | 3210 | |
ccd187cd AK |
3211 | if (ext) { |
3212 | if (!nl_attr_put(&req->n, datalen, NDA_EXT_FLAGS, &ext_flags, | |
3213 | sizeof(ext_flags))) | |
3214 | return 0; | |
3215 | } | |
3216 | ||
80e19eb7 AK |
3217 | if (nhg_id) { |
3218 | if (!nl_attr_put32(&req->n, datalen, NDA_NH_ID, nhg_id)) | |
3219 | return 0; | |
3220 | } else { | |
3221 | ipa_len = | |
3222 | IS_IPADDR_V4(ip) ? IPV4_MAX_BYTELEN : IPV6_MAX_BYTELEN; | |
3223 | if (!nl_attr_put(&req->n, datalen, NDA_DST, &ip->ip.addr, | |
3224 | ipa_len)) | |
3225 | return 0; | |
3226 | } | |
340845e2 JU |
3227 | |
3228 | if (op == DPLANE_OP_MAC_INSTALL || op == DPLANE_OP_MAC_DELETE) { | |
3229 | vlanid_t vid = dplane_ctx_mac_get_vlan(ctx); | |
13d60d35 | 3230 | |
0be6e7d7 JU |
3231 | if (vid > 0) { |
3232 | if (!nl_attr_put16(&req->n, datalen, NDA_VLAN, vid)) | |
3233 | return 0; | |
3234 | } | |
13d60d35 | 3235 | |
0be6e7d7 JU |
3236 | if (!nl_attr_put32(&req->n, datalen, NDA_MASTER, |
3237 | dplane_ctx_mac_get_br_ifindex(ctx))) | |
3238 | return 0; | |
340845e2 | 3239 | } |
13d60d35 | 3240 | |
d4d4ec1c | 3241 | return NLMSG_ALIGN(req->n.nlmsg_len); |
13d60d35 | 3242 | } |
3243 | ||
340845e2 JU |
3244 | /* |
3245 | * Add remote VTEP to the flood list for this VxLAN interface (VNI). This | |
3246 | * is done by adding an FDB entry with a MAC of 00:00:00:00:00:00. | |
3247 | */ | |
67e3369e JU |
3248 | static ssize_t |
3249 | netlink_vxlan_flood_update_ctx(const struct zebra_dplane_ctx *ctx, int cmd, | |
3250 | void *buf, size_t buflen) | |
340845e2 JU |
3251 | { |
3252 | struct ethaddr dst_mac = {.octet = {0}}; | |
88217099 PG |
3253 | int proto = RTPROT_ZEBRA; |
3254 | ||
3255 | if (dplane_ctx_get_type(ctx) != 0) | |
3256 | proto = zebra2proto(dplane_ctx_get_type(ctx)); | |
d4d4ec1c | 3257 | |
67e3369e | 3258 | return netlink_neigh_update_msg_encode( |
0a27a2fe PG |
3259 | ctx, cmd, (const void *)&dst_mac, ETH_ALEN, |
3260 | dplane_ctx_neigh_get_ipaddr(ctx), false, PF_BRIDGE, 0, NTF_SELF, | |
3261 | (NUD_NOARP | NUD_PERMANENT), 0 /*nhg*/, false /*nfy*/, | |
3262 | 0 /*nfy_flags*/, false /*ext*/, 0 /*ext_flags*/, buf, buflen, | |
88217099 | 3263 | proto); |
340845e2 JU |
3264 | } |
3265 | ||
2232a77c | 3266 | #ifndef NDA_RTA |
d62a17ae | 3267 | #define NDA_RTA(r) \ |
3268 | ((struct rtattr *)(((char *)(r)) + NLMSG_ALIGN(sizeof(struct ndmsg)))) | |
2232a77c | 3269 | #endif |
3270 | ||
2414abd3 | 3271 | static int netlink_macfdb_change(struct nlmsghdr *h, int len, ns_id_t ns_id) |
2232a77c | 3272 | { |
d62a17ae | 3273 | struct ndmsg *ndm; |
3274 | struct interface *ifp; | |
3275 | struct zebra_if *zif; | |
d62a17ae | 3276 | struct rtattr *tb[NDA_MAX + 1]; |
3277 | struct interface *br_if; | |
3278 | struct ethaddr mac; | |
3279 | vlanid_t vid = 0; | |
4b3f26f4 | 3280 | struct in_addr vtep_ip; |
d62a17ae | 3281 | int vid_present = 0, dst_present = 0; |
d62a17ae | 3282 | char vid_buf[20]; |
3283 | char dst_buf[30]; | |
a37f4598 | 3284 | bool sticky; |
f188e68e AK |
3285 | bool local_inactive = false; |
3286 | bool dp_static = false; | |
3287 | uint32_t nhg_id = 0; | |
d62a17ae | 3288 | |
3289 | ndm = NLMSG_DATA(h); | |
3290 | ||
2853fed6 | 3291 | /* We only process macfdb notifications if EVPN is enabled */ |
3292 | if (!is_evpn_enabled()) | |
3293 | return 0; | |
3294 | ||
4b3f26f4 | 3295 | /* Parse attributes and extract fields of interest. Do basic |
3296 | * validation of the fields. | |
3297 | */ | |
4bcdb608 NA |
3298 | netlink_parse_rtattr_flags(tb, NDA_MAX, NDA_RTA(ndm), len, |
3299 | NLA_F_NESTED); | |
d62a17ae | 3300 | |
3301 | if (!tb[NDA_LLADDR]) { | |
28bd0652 | 3302 | if (IS_ZEBRA_DEBUG_KERNEL) |
4b3f26f4 | 3303 | zlog_debug("%s AF_BRIDGE IF %u - no LLADDR", |
28bd0652 | 3304 | nl_msg_type_to_str(h->nlmsg_type), |
4b3f26f4 | 3305 | ndm->ndm_ifindex); |
d62a17ae | 3306 | return 0; |
3307 | } | |
3308 | ||
ff8b7eb8 | 3309 | if (RTA_PAYLOAD(tb[NDA_LLADDR]) != ETH_ALEN) { |
28bd0652 DS |
3310 | if (IS_ZEBRA_DEBUG_KERNEL) |
3311 | zlog_debug( | |
4b3f26f4 | 3312 | "%s AF_BRIDGE IF %u - LLADDR is not MAC, len %lu", |
3313 | nl_msg_type_to_str(h->nlmsg_type), ndm->ndm_ifindex, | |
28bd0652 | 3314 | (unsigned long)RTA_PAYLOAD(tb[NDA_LLADDR])); |
d62a17ae | 3315 | return 0; |
3316 | } | |
3317 | ||
ff8b7eb8 | 3318 | memcpy(&mac, RTA_DATA(tb[NDA_LLADDR]), ETH_ALEN); |
d62a17ae | 3319 | |
2be18df4 | 3320 | if (tb[NDA_VLAN]) { |
d62a17ae | 3321 | vid_present = 1; |
d7c0a89a | 3322 | vid = *(uint16_t *)RTA_DATA(tb[NDA_VLAN]); |
772270f3 | 3323 | snprintf(vid_buf, sizeof(vid_buf), " VLAN %u", vid); |
d62a17ae | 3324 | } |
3325 | ||
3326 | if (tb[NDA_DST]) { | |
3327 | /* TODO: Only IPv4 supported now. */ | |
3328 | dst_present = 1; | |
4b3f26f4 | 3329 | memcpy(&vtep_ip.s_addr, RTA_DATA(tb[NDA_DST]), |
d62a17ae | 3330 | IPV4_MAX_BYTELEN); |
9bcef951 MS |
3331 | snprintfrr(dst_buf, sizeof(dst_buf), " dst %pI4", |
3332 | &vtep_ip); | |
d62a17ae | 3333 | } |
3334 | ||
f188e68e AK |
3335 | if (tb[NDA_NH_ID]) |
3336 | nhg_id = *(uint32_t *)RTA_DATA(tb[NDA_NH_ID]); | |
3337 | ||
3338 | if (ndm->ndm_state & NUD_STALE) | |
3339 | local_inactive = true; | |
3340 | ||
4bcdb608 NA |
3341 | if (tb[NDA_FDB_EXT_ATTRS]) { |
3342 | struct rtattr *attr = tb[NDA_FDB_EXT_ATTRS]; | |
3343 | struct rtattr *nfea_tb[NFEA_MAX + 1] = {0}; | |
3344 | ||
3345 | netlink_parse_rtattr_nested(nfea_tb, NFEA_MAX, attr); | |
3346 | if (nfea_tb[NFEA_ACTIVITY_NOTIFY]) { | |
3347 | uint8_t nfy_flags; | |
f188e68e | 3348 | |
4bcdb608 NA |
3349 | nfy_flags = *(uint8_t *)RTA_DATA( |
3350 | nfea_tb[NFEA_ACTIVITY_NOTIFY]); | |
3351 | if (nfy_flags & FDB_NOTIFY_BIT) | |
3352 | dp_static = true; | |
3353 | if (nfy_flags & FDB_NOTIFY_INACTIVE_BIT) | |
3354 | local_inactive = true; | |
3355 | } | |
f188e68e AK |
3356 | } |
3357 | ||
d62a17ae | 3358 | if (IS_ZEBRA_DEBUG_KERNEL) |
ef7b8be4 | 3359 | zlog_debug("Rx %s AF_BRIDGE IF %u%s st 0x%x fl 0x%x MAC %pEA%s nhg %d", |
d62a17ae | 3360 | nl_msg_type_to_str(h->nlmsg_type), |
d62a17ae | 3361 | ndm->ndm_ifindex, vid_present ? vid_buf : "", |
ef7b8be4 | 3362 | ndm->ndm_state, ndm->ndm_flags, &mac, |
f188e68e | 3363 | dst_present ? dst_buf : "", nhg_id); |
d62a17ae | 3364 | |
4b3f26f4 | 3365 | /* The interface should exist. */ |
3366 | ifp = if_lookup_by_index_per_ns(zebra_ns_lookup(ns_id), | |
3367 | ndm->ndm_ifindex); | |
3368 | if (!ifp || !ifp->info) | |
3369 | return 0; | |
3370 | ||
3371 | /* The interface should be something we're interested in. */ | |
3372 | if (!IS_ZEBRA_IF_BRIDGE_SLAVE(ifp)) | |
3373 | return 0; | |
3374 | ||
3375 | zif = (struct zebra_if *)ifp->info; | |
3376 | if ((br_if = zif->brslave_info.br_if) == NULL) { | |
3377 | if (IS_ZEBRA_DEBUG_KERNEL) | |
3378 | zlog_debug( | |
3379 | "%s AF_BRIDGE IF %s(%u) brIF %u - no bridge master", | |
3380 | nl_msg_type_to_str(h->nlmsg_type), ifp->name, | |
3381 | ndm->ndm_ifindex, | |
3382 | zif->brslave_info.bridge_ifindex); | |
3383 | return 0; | |
3384 | } | |
3385 | ||
f188e68e | 3386 | sticky = !!(ndm->ndm_flags & NTF_STICKY); |
4b3f26f4 | 3387 | |
28bd0652 DS |
3388 | if (filter_vlan && vid != filter_vlan) { |
3389 | if (IS_ZEBRA_DEBUG_KERNEL) | |
d6951e5e | 3390 | zlog_debug(" Filtered due to filter vlan: %d", |
28bd0652 | 3391 | filter_vlan); |
d62a17ae | 3392 | return 0; |
28bd0652 | 3393 | } |
d62a17ae | 3394 | |
3395 | /* If add or update, do accordingly if learnt on a "local" interface; if | |
3396 | * the notification is over VxLAN, this has to be related to | |
3397 | * multi-homing, | |
3398 | * so perform an implicit delete of any local entry (if it exists). | |
3399 | */ | |
3400 | if (h->nlmsg_type == RTM_NEWNEIGH) { | |
4b3f26f4 | 3401 | /* Drop "permanent" entries. */ |
3402 | if (ndm->ndm_state & NUD_PERMANENT) { | |
3403 | if (IS_ZEBRA_DEBUG_KERNEL) | |
d6951e5e DL |
3404 | zlog_debug( |
3405 | " Dropping entry because of NUD_PERMANENT"); | |
3406 | return 0; | |
4b3f26f4 | 3407 | } |
3408 | ||
d62a17ae | 3409 | if (IS_ZEBRA_IF_VXLAN(ifp)) |
15400f95 AK |
3410 | return zebra_vxlan_dp_network_mac_add( |
3411 | ifp, br_if, &mac, vid, nhg_id, sticky, | |
3412 | !!(ndm->ndm_flags & NTF_EXT_LEARNED)); | |
d62a17ae | 3413 | |
3414 | return zebra_vxlan_local_mac_add_update(ifp, br_if, &mac, vid, | |
f188e68e | 3415 | sticky, local_inactive, dp_static); |
d62a17ae | 3416 | } |
3417 | ||
3418 | /* This is a delete notification. | |
4b3f26f4 | 3419 | * Ignore the notification with IP dest as it may just signify that the |
3420 | * MAC has moved from remote to local. The exception is the special | |
3421 | * all-zeros MAC that represents the BUM flooding entry; we may have | |
3422 | * to readd it. Otherwise, | |
d62a17ae | 3423 | * 1. For a MAC over VxLan, check if it needs to be refreshed(readded) |
3424 | * 2. For a MAC over "local" interface, delete the mac | |
3425 | * Note: We will get notifications from both bridge driver and VxLAN | |
3426 | * driver. | |
d62a17ae | 3427 | */ |
f188e68e AK |
3428 | if (nhg_id) |
3429 | return 0; | |
3430 | ||
28bd0652 | 3431 | if (dst_present) { |
4b3f26f4 | 3432 | u_char zero_mac[6] = {0x0, 0x0, 0x0, 0x0, 0x0, 0x0}; |
3433 | ||
3434 | if (!memcmp(zero_mac, mac.octet, ETH_ALEN)) | |
3435 | return zebra_vxlan_check_readd_vtep(ifp, vtep_ip); | |
d62a17ae | 3436 | return 0; |
28bd0652 | 3437 | } |
d62a17ae | 3438 | |
3439 | if (IS_ZEBRA_IF_VXLAN(ifp)) | |
15400f95 | 3440 | return zebra_vxlan_dp_network_mac_del(ifp, br_if, &mac, vid); |
d62a17ae | 3441 | |
3442 | return zebra_vxlan_local_mac_del(ifp, br_if, &mac, vid); | |
2232a77c | 3443 | } |
3444 | ||
2414abd3 | 3445 | static int netlink_macfdb_table(struct nlmsghdr *h, ns_id_t ns_id, int startup) |
2232a77c | 3446 | { |
d62a17ae | 3447 | int len; |
3448 | struct ndmsg *ndm; | |
2232a77c | 3449 | |
d62a17ae | 3450 | if (h->nlmsg_type != RTM_NEWNEIGH) |
3451 | return 0; | |
2232a77c | 3452 | |
d62a17ae | 3453 | /* Length validity. */ |
3454 | len = h->nlmsg_len - NLMSG_LENGTH(sizeof(struct ndmsg)); | |
3455 | if (len < 0) | |
3456 | return -1; | |
2232a77c | 3457 | |
d62a17ae | 3458 | /* We are interested only in AF_BRIDGE notifications. */ |
3459 | ndm = NLMSG_DATA(h); | |
3460 | if (ndm->ndm_family != AF_BRIDGE) | |
3461 | return 0; | |
2232a77c | 3462 | |
2414abd3 | 3463 | return netlink_macfdb_change(h, len, ns_id); |
2232a77c | 3464 | } |
3465 | ||
3466 | /* Request for MAC FDB information from the kernel */ | |
85a75f1e MS |
3467 | static int netlink_request_macs(struct nlsock *netlink_cmd, int family, |
3468 | int type, ifindex_t master_ifindex) | |
2232a77c | 3469 | { |
d62a17ae | 3470 | struct { |
3471 | struct nlmsghdr n; | |
3472 | struct ifinfomsg ifm; | |
3473 | char buf[256]; | |
3474 | } req; | |
3475 | ||
3476 | /* Form the request, specifying filter (rtattr) if needed. */ | |
3477 | memset(&req, 0, sizeof(req)); | |
3478 | req.n.nlmsg_type = type; | |
718f9b0f | 3479 | req.n.nlmsg_flags = NLM_F_ROOT | NLM_F_MATCH | NLM_F_REQUEST; |
d62a17ae | 3480 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg)); |
3481 | req.ifm.ifi_family = family; | |
3482 | if (master_ifindex) | |
312a6bee | 3483 | nl_attr_put32(&req.n, sizeof(req), IFLA_MASTER, master_ifindex); |
d62a17ae | 3484 | |
fd3f8e52 | 3485 | return netlink_request(netlink_cmd, &req); |
2232a77c | 3486 | } |
3487 | ||
3488 | /* | |
3489 | * MAC forwarding database read using netlink interface. This is invoked | |
3490 | * at startup. | |
3491 | */ | |
d62a17ae | 3492 | int netlink_macfdb_read(struct zebra_ns *zns) |
2232a77c | 3493 | { |
d62a17ae | 3494 | int ret; |
85a75f1e MS |
3495 | struct zebra_dplane_info dp_info; |
3496 | ||
3497 | zebra_dplane_info_from_zns(&dp_info, zns, true /*is_cmd*/); | |
d62a17ae | 3498 | |
3499 | /* Get bridge FDB table. */ | |
85a75f1e MS |
3500 | ret = netlink_request_macs(&zns->netlink_cmd, AF_BRIDGE, RTM_GETNEIGH, |
3501 | 0); | |
d62a17ae | 3502 | if (ret < 0) |
3503 | return ret; | |
3504 | /* We are reading entire table. */ | |
3505 | filter_vlan = 0; | |
85a75f1e | 3506 | ret = netlink_parse_info(netlink_macfdb_table, &zns->netlink_cmd, |
9bfadae8 | 3507 | &dp_info, 0, true); |
d62a17ae | 3508 | |
3509 | return ret; | |
2232a77c | 3510 | } |
3511 | ||
3512 | /* | |
3513 | * MAC forwarding database read using netlink interface. This is for a | |
3514 | * specific bridge and matching specific access VLAN (if VLAN-aware bridge). | |
3515 | */ | |
d62a17ae | 3516 | int netlink_macfdb_read_for_bridge(struct zebra_ns *zns, struct interface *ifp, |
3517 | struct interface *br_if) | |
2232a77c | 3518 | { |
d62a17ae | 3519 | struct zebra_if *br_zif; |
3520 | struct zebra_if *zif; | |
3521 | struct zebra_l2info_vxlan *vxl; | |
85a75f1e | 3522 | struct zebra_dplane_info dp_info; |
d62a17ae | 3523 | int ret = 0; |
3524 | ||
85a75f1e | 3525 | zebra_dplane_info_from_zns(&dp_info, zns, true /*is_cmd*/); |
d62a17ae | 3526 | |
3527 | /* Save VLAN we're filtering on, if needed. */ | |
3528 | br_zif = (struct zebra_if *)br_if->info; | |
3529 | zif = (struct zebra_if *)ifp->info; | |
3530 | vxl = &zif->l2info.vxl; | |
3531 | if (IS_ZEBRA_IF_BRIDGE_VLAN_AWARE(br_zif)) | |
3532 | filter_vlan = vxl->access_vlan; | |
3533 | ||
3534 | /* Get bridge FDB table for specific bridge - we do the VLAN filtering. | |
3535 | */ | |
85a75f1e | 3536 | ret = netlink_request_macs(&zns->netlink_cmd, AF_BRIDGE, RTM_GETNEIGH, |
d62a17ae | 3537 | br_if->ifindex); |
3538 | if (ret < 0) | |
3539 | return ret; | |
85a75f1e | 3540 | ret = netlink_parse_info(netlink_macfdb_table, &zns->netlink_cmd, |
9bfadae8 | 3541 | &dp_info, 0, false); |
d62a17ae | 3542 | |
3543 | /* Reset VLAN filter. */ | |
3544 | filter_vlan = 0; | |
3545 | return ret; | |
2232a77c | 3546 | } |
3547 | ||
67fb9374 CS |
3548 | |
3549 | /* Request for MAC FDB for a specific MAC address in VLAN from the kernel */ | |
3550 | static int netlink_request_specific_mac_in_bridge(struct zebra_ns *zns, | |
1a3bd37f | 3551 | int family, int type, |
67fb9374 | 3552 | struct interface *br_if, |
1a3bd37f | 3553 | const struct ethaddr *mac, |
67fb9374 CS |
3554 | vlanid_t vid) |
3555 | { | |
3556 | struct { | |
3557 | struct nlmsghdr n; | |
3558 | struct ndmsg ndm; | |
3559 | char buf[256]; | |
3560 | } req; | |
3561 | struct zebra_if *br_zif; | |
67fb9374 CS |
3562 | |
3563 | memset(&req, 0, sizeof(req)); | |
3564 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)); | |
3565 | req.n.nlmsg_type = type; /* RTM_GETNEIGH */ | |
3566 | req.n.nlmsg_flags = NLM_F_REQUEST; | |
3567 | req.ndm.ndm_family = family; /* AF_BRIDGE */ | |
3568 | /* req.ndm.ndm_state = NUD_REACHABLE; */ | |
3569 | ||
312a6bee | 3570 | nl_attr_put(&req.n, sizeof(req), NDA_LLADDR, mac, 6); |
67fb9374 CS |
3571 | |
3572 | br_zif = (struct zebra_if *)br_if->info; | |
3573 | if (IS_ZEBRA_IF_BRIDGE_VLAN_AWARE(br_zif) && vid > 0) | |
312a6bee | 3574 | nl_attr_put16(&req.n, sizeof(req), NDA_VLAN, vid); |
67fb9374 | 3575 | |
312a6bee | 3576 | nl_attr_put32(&req.n, sizeof(req), NDA_MASTER, br_if->ifindex); |
67fb9374 CS |
3577 | |
3578 | if (IS_ZEBRA_DEBUG_KERNEL) | |
bd47f3a3 | 3579 | zlog_debug( |
ef7b8be4 | 3580 | "%s: Tx family %s IF %s(%u) vrf %s(%u) MAC %pEA vid %u", |
bd47f3a3 | 3581 | __func__, nl_family_to_str(req.ndm.ndm_family), |
096f7609 IR |
3582 | br_if->name, br_if->ifindex, br_if->vrf->name, |
3583 | br_if->vrf->vrf_id, mac, vid); | |
67fb9374 | 3584 | |
fd3f8e52 | 3585 | return netlink_request(&zns->netlink_cmd, &req); |
67fb9374 CS |
3586 | } |
3587 | ||
3588 | int netlink_macfdb_read_specific_mac(struct zebra_ns *zns, | |
3589 | struct interface *br_if, | |
1a3bd37f | 3590 | const struct ethaddr *mac, vlanid_t vid) |
67fb9374 CS |
3591 | { |
3592 | int ret = 0; | |
3593 | struct zebra_dplane_info dp_info; | |
3594 | ||
3595 | zebra_dplane_info_from_zns(&dp_info, zns, true /*is_cmd*/); | |
3596 | ||
3597 | /* Get bridge FDB table for specific bridge - we do the VLAN filtering. | |
3598 | */ | |
3599 | ret = netlink_request_specific_mac_in_bridge(zns, AF_BRIDGE, | |
3600 | RTM_GETNEIGH, | |
3601 | br_if, mac, vid); | |
3602 | if (ret < 0) | |
3603 | return ret; | |
3604 | ||
3605 | ret = netlink_parse_info(netlink_macfdb_table, &zns->netlink_cmd, | |
9bfadae8 | 3606 | &dp_info, 1, false); |
67fb9374 CS |
3607 | |
3608 | return ret; | |
3609 | } | |
036d93c0 MS |
3610 | |
3611 | /* | |
3612 | * Netlink-specific handler for MAC updates using dataplane context object. | |
3613 | */ | |
67e3369e JU |
3614 | ssize_t netlink_macfdb_update_ctx(struct zebra_dplane_ctx *ctx, void *data, |
3615 | size_t datalen) | |
2232a77c | 3616 | { |
340845e2 | 3617 | struct ipaddr vtep_ip; |
036d93c0 | 3618 | vlanid_t vid; |
d4d4ec1c RZ |
3619 | ssize_t total; |
3620 | int cmd; | |
340845e2 JU |
3621 | uint8_t flags; |
3622 | uint16_t state; | |
506efd37 | 3623 | uint32_t nhg_id; |
f188e68e AK |
3624 | uint32_t update_flags; |
3625 | bool nfy = false; | |
3626 | uint8_t nfy_flags = 0; | |
88217099 PG |
3627 | int proto = RTPROT_ZEBRA; |
3628 | ||
3629 | if (dplane_ctx_get_type(ctx) != 0) | |
3630 | proto = zebra2proto(dplane_ctx_get_type(ctx)); | |
d4d4ec1c RZ |
3631 | |
3632 | cmd = dplane_ctx_get_op(ctx) == DPLANE_OP_MAC_INSTALL | |
3633 | ? RTM_NEWNEIGH : RTM_DELNEIGH; | |
036d93c0 | 3634 | |
f188e68e | 3635 | flags = NTF_MASTER; |
340845e2 | 3636 | state = NUD_REACHABLE; |
d62a17ae | 3637 | |
f188e68e AK |
3638 | update_flags = dplane_ctx_mac_get_update_flags(ctx); |
3639 | if (update_flags & DPLANE_MAC_REMOTE) { | |
3640 | flags |= NTF_SELF; | |
60e372e9 AK |
3641 | if (dplane_ctx_mac_is_sticky(ctx)) { |
3642 | /* NUD_NOARP prevents the entry from expiring */ | |
3643 | state |= NUD_NOARP; | |
3644 | /* sticky the entry from moving */ | |
f188e68e | 3645 | flags |= NTF_STICKY; |
60e372e9 | 3646 | } else { |
f188e68e | 3647 | flags |= NTF_EXT_LEARNED; |
60e372e9 | 3648 | } |
f188e68e AK |
3649 | /* if it was static-local previously we need to clear the |
3650 | * notify flags on replace with remote | |
3651 | */ | |
3652 | if (update_flags & DPLANE_MAC_WAS_STATIC) | |
3653 | nfy = true; | |
3654 | } else { | |
3655 | /* local mac */ | |
3656 | if (update_flags & DPLANE_MAC_SET_STATIC) { | |
4bcdb608 | 3657 | nfy_flags |= FDB_NOTIFY_BIT; |
f188e68e AK |
3658 | state |= NUD_NOARP; |
3659 | } | |
3660 | ||
3661 | if (update_flags & DPLANE_MAC_SET_INACTIVE) | |
4bcdb608 | 3662 | nfy_flags |= FDB_NOTIFY_INACTIVE_BIT; |
f188e68e AK |
3663 | |
3664 | nfy = true; | |
3665 | } | |
478566d6 | 3666 | |
506efd37 | 3667 | nhg_id = dplane_ctx_mac_get_nhg_id(ctx); |
340845e2 JU |
3668 | vtep_ip.ipaddr_v4 = *(dplane_ctx_mac_get_vtep_ip(ctx)); |
3669 | SET_IPADDR_V4(&vtep_ip); | |
d62a17ae | 3670 | |
036d93c0 | 3671 | if (IS_ZEBRA_DEBUG_KERNEL) { |
478566d6 | 3672 | char vid_buf[20]; |
506efd37 | 3673 | const struct ethaddr *mac = dplane_ctx_mac_get_addr(ctx); |
478566d6 | 3674 | |
340845e2 JU |
3675 | vid = dplane_ctx_mac_get_vlan(ctx); |
3676 | if (vid > 0) | |
478566d6 MS |
3677 | snprintf(vid_buf, sizeof(vid_buf), " VLAN %u", vid); |
3678 | else | |
3679 | vid_buf[0] = '\0'; | |
036d93c0 | 3680 | |
ccd187cd | 3681 | zlog_debug( |
ef7b8be4 | 3682 | "Tx %s family %s IF %s(%u)%s %sMAC %pEA dst %pIA nhg %u%s%s%s%s%s", |
ccd187cd AK |
3683 | nl_msg_type_to_str(cmd), nl_family_to_str(AF_BRIDGE), |
3684 | dplane_ctx_get_ifname(ctx), dplane_ctx_get_ifindex(ctx), | |
3685 | vid_buf, dplane_ctx_mac_is_sticky(ctx) ? "sticky " : "", | |
ef7b8be4 | 3686 | mac, &vtep_ip, nhg_id, |
ccd187cd AK |
3687 | (update_flags & DPLANE_MAC_REMOTE) ? " rem" : "", |
3688 | (update_flags & DPLANE_MAC_WAS_STATIC) ? " clr_sync" | |
3689 | : "", | |
3690 | (update_flags & DPLANE_MAC_SET_STATIC) ? " static" : "", | |
3691 | (update_flags & DPLANE_MAC_SET_INACTIVE) ? " inactive" | |
3692 | : "", | |
3693 | nfy ? " nfy" : ""); | |
036d93c0 | 3694 | } |
d62a17ae | 3695 | |
0be6e7d7 | 3696 | total = netlink_neigh_update_msg_encode( |
0a27a2fe PG |
3697 | ctx, cmd, (const void *)dplane_ctx_mac_get_addr(ctx), ETH_ALEN, |
3698 | &vtep_ip, true, AF_BRIDGE, 0, flags, state, nhg_id, nfy, | |
3699 | nfy_flags, false /*ext*/, 0 /*ext_flags*/, data, datalen, | |
88217099 | 3700 | proto); |
d4d4ec1c RZ |
3701 | |
3702 | return total; | |
2232a77c | 3703 | } |
3704 | ||
f17b99ed DS |
3705 | /* |
3706 | * In the event the kernel deletes ipv4 link-local neighbor entries created for | |
3707 | * 5549 support, re-install them. | |
3708 | */ | |
3709 | static void netlink_handle_5549(struct ndmsg *ndm, struct zebra_if *zif, | |
9b036974 DS |
3710 | struct interface *ifp, struct ipaddr *ip, |
3711 | bool handle_failed) | |
f17b99ed DS |
3712 | { |
3713 | if (ndm->ndm_family != AF_INET) | |
3714 | return; | |
3715 | ||
3716 | if (!zif->v6_2_v4_ll_neigh_entry) | |
3717 | return; | |
3718 | ||
3719 | if (ipv4_ll.s_addr != ip->ip._v4_addr.s_addr) | |
3720 | return; | |
3721 | ||
9b036974 DS |
3722 | if (handle_failed && ndm->ndm_state & NUD_FAILED) { |
3723 | zlog_info("Neighbor Entry for %s has entered a failed state, not reinstalling", | |
3724 | ifp->name); | |
3725 | return; | |
3726 | } | |
3727 | ||
f17b99ed DS |
3728 | if_nbr_ipv6ll_to_ipv4ll_neigh_update(ifp, &zif->v6_2_v4_ll_addr6, true); |
3729 | } | |
3730 | ||
d62a17ae | 3731 | #define NUD_VALID \ |
3732 | (NUD_PERMANENT | NUD_NOARP | NUD_REACHABLE | NUD_PROBE | NUD_STALE \ | |
3733 | | NUD_DELAY) | |
f188e68e AK |
3734 | #define NUD_LOCAL_ACTIVE \ |
3735 | (NUD_PERMANENT | NUD_NOARP | NUD_REACHABLE) | |
2232a77c | 3736 | |
80f6b5fa PG |
3737 | static int netlink_nbr_entry_state_to_zclient(int nbr_state) |
3738 | { | |
3739 | /* an exact match is done between | |
3740 | * - netlink neighbor state values: NDM_XXX (see in linux/neighbour.h) | |
3741 | * - zclient neighbor state values: ZEBRA_NEIGH_STATE_XXX | |
3742 | * (see in lib/zclient.h) | |
3743 | */ | |
3744 | return nbr_state; | |
3745 | } | |
2414abd3 | 3746 | static int netlink_ipneigh_change(struct nlmsghdr *h, int len, ns_id_t ns_id) |
2232a77c | 3747 | { |
d62a17ae | 3748 | struct ndmsg *ndm; |
3749 | struct interface *ifp; | |
3750 | struct zebra_if *zif; | |
d62a17ae | 3751 | struct rtattr *tb[NDA_MAX + 1]; |
3752 | struct interface *link_if; | |
3753 | struct ethaddr mac; | |
3754 | struct ipaddr ip; | |
3755 | char buf[ETHER_ADDR_STRLEN]; | |
d62a17ae | 3756 | int mac_present = 0; |
a37f4598 | 3757 | bool is_ext; |
3758 | bool is_router; | |
f188e68e | 3759 | bool local_inactive; |
7c0e4dc6 AK |
3760 | uint32_t ext_flags = 0; |
3761 | bool dp_static = false; | |
7723e8d3 PG |
3762 | int l2_len = 0; |
3763 | int cmd; | |
d62a17ae | 3764 | |
3765 | ndm = NLMSG_DATA(h); | |
3766 | ||
3767 | /* The interface should exist. */ | |
5895d33f | 3768 | ifp = if_lookup_by_index_per_ns(zebra_ns_lookup(ns_id), |
d62a17ae | 3769 | ndm->ndm_ifindex); |
2853fed6 | 3770 | if (!ifp || !ifp->info) |
d62a17ae | 3771 | return 0; |
3772 | ||
20089ae2 DS |
3773 | zif = (struct zebra_if *)ifp->info; |
3774 | ||
3775 | /* Parse attributes and extract fields of interest. */ | |
20089ae2 DS |
3776 | netlink_parse_rtattr(tb, NDA_MAX, NDA_RTA(ndm), len); |
3777 | ||
3778 | if (!tb[NDA_DST]) { | |
bd47f3a3 | 3779 | zlog_debug("%s family %s IF %s(%u) vrf %s(%u) - no DST", |
9df414fe QY |
3780 | nl_msg_type_to_str(h->nlmsg_type), |
3781 | nl_family_to_str(ndm->ndm_family), ifp->name, | |
096f7609 | 3782 | ndm->ndm_ifindex, ifp->vrf->name, ifp->vrf->vrf_id); |
d62a17ae | 3783 | return 0; |
20089ae2 DS |
3784 | } |
3785 | ||
6006b807 | 3786 | memset(&ip, 0, sizeof(ip)); |
20089ae2 DS |
3787 | ip.ipa_type = (ndm->ndm_family == AF_INET) ? IPADDR_V4 : IPADDR_V6; |
3788 | memcpy(&ip.ip.addr, RTA_DATA(tb[NDA_DST]), RTA_PAYLOAD(tb[NDA_DST])); | |
3789 | ||
f17b99ed DS |
3790 | /* if kernel deletes our rfc5549 neighbor entry, re-install it */ |
3791 | if (h->nlmsg_type == RTM_DELNEIGH && (ndm->ndm_state & NUD_PERMANENT)) { | |
9b036974 | 3792 | netlink_handle_5549(ndm, zif, ifp, &ip, false); |
28bd0652 DS |
3793 | if (IS_ZEBRA_DEBUG_KERNEL) |
3794 | zlog_debug( | |
1d5453d6 | 3795 | " Neighbor Entry Received is a 5549 entry, finished"); |
20089ae2 DS |
3796 | return 0; |
3797 | } | |
d62a17ae | 3798 | |
f17b99ed | 3799 | /* if kernel marks our rfc5549 neighbor entry invalid, re-install it */ |
9b036974 DS |
3800 | if (h->nlmsg_type == RTM_NEWNEIGH && !(ndm->ndm_state & NUD_VALID)) |
3801 | netlink_handle_5549(ndm, zif, ifp, &ip, true); | |
f17b99ed | 3802 | |
7723e8d3 PG |
3803 | /* we send link layer information to client: |
3804 | * - nlmsg_type = RTM_DELNEIGH|NEWNEIGH|GETNEIGH | |
3805 | * - struct ipaddr ( for DEL and GET) | |
3806 | * - struct ethaddr mac; (for NEW) | |
3807 | */ | |
3808 | if (h->nlmsg_type == RTM_NEWNEIGH) | |
3809 | cmd = ZEBRA_NHRP_NEIGH_ADDED; | |
3810 | else if (h->nlmsg_type == RTM_GETNEIGH) | |
3811 | cmd = ZEBRA_NHRP_NEIGH_GET; | |
3812 | else if (h->nlmsg_type == RTM_DELNEIGH) | |
3813 | cmd = ZEBRA_NHRP_NEIGH_REMOVED; | |
3814 | else { | |
3815 | zlog_debug("%s(): unknown nlmsg type %u", __func__, | |
3816 | h->nlmsg_type); | |
3817 | return 0; | |
3818 | } | |
3819 | if (tb[NDA_LLADDR]) { | |
3820 | /* copy LLADDR information */ | |
3821 | l2_len = RTA_PAYLOAD(tb[NDA_LLADDR]); | |
7723e8d3 | 3822 | } |
d603c077 PG |
3823 | if (l2_len == IPV4_MAX_BYTELEN || l2_len == 0) { |
3824 | union sockunion link_layer_ipv4; | |
3825 | ||
3826 | if (l2_len) { | |
3827 | sockunion_family(&link_layer_ipv4) = AF_INET; | |
3828 | memcpy((void *)sockunion_get_addr(&link_layer_ipv4), | |
b7c21fad | 3829 | RTA_DATA(tb[NDA_LLADDR]), l2_len); |
d603c077 PG |
3830 | } else |
3831 | sockunion_family(&link_layer_ipv4) = AF_UNSPEC; | |
80f6b5fa PG |
3832 | zsend_nhrp_neighbor_notify( |
3833 | cmd, ifp, &ip, | |
3834 | netlink_nbr_entry_state_to_zclient(ndm->ndm_state), | |
3835 | &link_layer_ipv4); | |
d603c077 | 3836 | } |
7723e8d3 PG |
3837 | |
3838 | if (h->nlmsg_type == RTM_GETNEIGH) | |
3839 | return 0; | |
3840 | ||
d62a17ae | 3841 | /* The neighbor is present on an SVI. From this, we locate the |
3842 | * underlying | |
3843 | * bridge because we're only interested in neighbors on a VxLAN bridge. | |
3844 | * The bridge is located based on the nature of the SVI: | |
3845 | * (a) In the case of a VLAN-aware bridge, the SVI is a L3 VLAN | |
3846 | * interface | |
3847 | * and is linked to the bridge | |
3848 | * (b) In the case of a VLAN-unaware bridge, the SVI is the bridge | |
3819e4ce | 3849 | * interface |
d62a17ae | 3850 | * itself |
3851 | */ | |
3852 | if (IS_ZEBRA_IF_VLAN(ifp)) { | |
5895d33f | 3853 | link_if = if_lookup_by_index_per_ns(zebra_ns_lookup(ns_id), |
71349e03 | 3854 | zif->link_ifindex); |
d62a17ae | 3855 | if (!link_if) |
3856 | return 0; | |
3857 | } else if (IS_ZEBRA_IF_BRIDGE(ifp)) | |
3858 | link_if = ifp; | |
28bd0652 DS |
3859 | else { |
3860 | if (IS_ZEBRA_DEBUG_KERNEL) | |
3861 | zlog_debug( | |
1d5453d6 | 3862 | " Neighbor Entry received is not on a VLAN or a BRIDGE, ignoring"); |
d62a17ae | 3863 | return 0; |
28bd0652 | 3864 | } |
d62a17ae | 3865 | |
6006b807 | 3866 | memset(&mac, 0, sizeof(mac)); |
d62a17ae | 3867 | if (h->nlmsg_type == RTM_NEWNEIGH) { |
3868 | if (tb[NDA_LLADDR]) { | |
ff8b7eb8 | 3869 | if (RTA_PAYLOAD(tb[NDA_LLADDR]) != ETH_ALEN) { |
28bd0652 DS |
3870 | if (IS_ZEBRA_DEBUG_KERNEL) |
3871 | zlog_debug( | |
bd47f3a3 | 3872 | "%s family %s IF %s(%u) vrf %s(%u) - LLADDR is not MAC, len %lu", |
28bd0652 DS |
3873 | nl_msg_type_to_str( |
3874 | h->nlmsg_type), | |
3875 | nl_family_to_str( | |
3876 | ndm->ndm_family), | |
3877 | ifp->name, ndm->ndm_ifindex, | |
096f7609 IR |
3878 | ifp->vrf->name, |
3879 | ifp->vrf->vrf_id, | |
28bd0652 DS |
3880 | (unsigned long)RTA_PAYLOAD( |
3881 | tb[NDA_LLADDR])); | |
d62a17ae | 3882 | return 0; |
3883 | } | |
3884 | ||
3885 | mac_present = 1; | |
ff8b7eb8 | 3886 | memcpy(&mac, RTA_DATA(tb[NDA_LLADDR]), ETH_ALEN); |
d62a17ae | 3887 | } |
3888 | ||
a37f4598 | 3889 | is_ext = !!(ndm->ndm_flags & NTF_EXT_LEARNED); |
3890 | is_router = !!(ndm->ndm_flags & NTF_ROUTER); | |
d62a17ae | 3891 | |
7c0e4dc6 AK |
3892 | if (tb[NDA_EXT_FLAGS]) { |
3893 | ext_flags = *(uint32_t *)RTA_DATA(tb[NDA_EXT_FLAGS]); | |
3894 | if (ext_flags & NTF_E_MH_PEER_SYNC) | |
3895 | dp_static = true; | |
3896 | } | |
3897 | ||
d62a17ae | 3898 | if (IS_ZEBRA_DEBUG_KERNEL) |
3899 | zlog_debug( | |
ef7b8be4 | 3900 | "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 | 3901 | nl_msg_type_to_str(h->nlmsg_type), |
3902 | nl_family_to_str(ndm->ndm_family), ifp->name, | |
096f7609 IR |
3903 | ndm->ndm_ifindex, ifp->vrf->name, |
3904 | ifp->vrf->vrf_id, &ip, | |
d62a17ae | 3905 | mac_present |
3906 | ? prefix_mac2str(&mac, buf, sizeof(buf)) | |
3907 | : "", | |
7c0e4dc6 | 3908 | ndm->ndm_state, ndm->ndm_flags, ext_flags); |
d62a17ae | 3909 | |
3910 | /* If the neighbor state is valid for use, process as an add or | |
3911 | * update | |
3912 | * else process as a delete. Note that the delete handling may | |
3913 | * result | |
3914 | * in re-adding the neighbor if it is a valid "remote" neighbor. | |
3915 | */ | |
f188e68e | 3916 | if (ndm->ndm_state & NUD_VALID) { |
c7bfd085 AK |
3917 | if (zebra_evpn_mh_do_adv_reachable_neigh_only()) |
3918 | local_inactive = | |
3919 | !(ndm->ndm_state & NUD_LOCAL_ACTIVE); | |
3920 | else | |
3921 | /* If EVPN-MH is not enabled we treat STALE | |
3922 | * neighbors as locally-active and advertise | |
3923 | * them | |
3924 | */ | |
3925 | local_inactive = false; | |
f188e68e | 3926 | |
ee69da27 | 3927 | return zebra_vxlan_handle_kernel_neigh_update( |
7c0e4dc6 AK |
3928 | ifp, link_if, &ip, &mac, ndm->ndm_state, is_ext, |
3929 | is_router, local_inactive, dp_static); | |
f188e68e | 3930 | } |
d62a17ae | 3931 | |
ee69da27 | 3932 | return zebra_vxlan_handle_kernel_neigh_del(ifp, link_if, &ip); |
d62a17ae | 3933 | } |
3934 | ||
3935 | if (IS_ZEBRA_DEBUG_KERNEL) | |
ef7b8be4 | 3936 | zlog_debug("Rx %s family %s IF %s(%u) vrf %s(%u) IP %pIA", |
d62a17ae | 3937 | nl_msg_type_to_str(h->nlmsg_type), |
3938 | nl_family_to_str(ndm->ndm_family), ifp->name, | |
096f7609 | 3939 | ndm->ndm_ifindex, ifp->vrf->name, ifp->vrf->vrf_id, |
ef7b8be4 | 3940 | &ip); |
d62a17ae | 3941 | |
3942 | /* Process the delete - it may result in re-adding the neighbor if it is | |
3943 | * a valid "remote" neighbor. | |
3944 | */ | |
ee69da27 | 3945 | return zebra_vxlan_handle_kernel_neigh_del(ifp, link_if, &ip); |
2232a77c | 3946 | } |
3947 | ||
2414abd3 | 3948 | static int netlink_neigh_table(struct nlmsghdr *h, ns_id_t ns_id, int startup) |
2232a77c | 3949 | { |
d62a17ae | 3950 | int len; |
3951 | struct ndmsg *ndm; | |
2232a77c | 3952 | |
d62a17ae | 3953 | if (h->nlmsg_type != RTM_NEWNEIGH) |
3954 | return 0; | |
2232a77c | 3955 | |
d62a17ae | 3956 | /* Length validity. */ |
3957 | len = h->nlmsg_len - NLMSG_LENGTH(sizeof(struct ndmsg)); | |
3958 | if (len < 0) | |
3959 | return -1; | |
2232a77c | 3960 | |
d62a17ae | 3961 | /* We are interested only in AF_INET or AF_INET6 notifications. */ |
3962 | ndm = NLMSG_DATA(h); | |
3963 | if (ndm->ndm_family != AF_INET && ndm->ndm_family != AF_INET6) | |
3964 | return 0; | |
2232a77c | 3965 | |
2414abd3 | 3966 | return netlink_neigh_change(h, len); |
2232a77c | 3967 | } |
3968 | ||
3969 | /* Request for IP neighbor information from the kernel */ | |
85a75f1e MS |
3970 | static int netlink_request_neigh(struct nlsock *netlink_cmd, int family, |
3971 | int type, ifindex_t ifindex) | |
2232a77c | 3972 | { |
d62a17ae | 3973 | struct { |
3974 | struct nlmsghdr n; | |
3975 | struct ndmsg ndm; | |
3976 | char buf[256]; | |
3977 | } req; | |
3978 | ||
3979 | /* Form the request, specifying filter (rtattr) if needed. */ | |
3980 | memset(&req, 0, sizeof(req)); | |
3981 | req.n.nlmsg_type = type; | |
718f9b0f | 3982 | req.n.nlmsg_flags = NLM_F_ROOT | NLM_F_MATCH | NLM_F_REQUEST; |
d62a17ae | 3983 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)); |
3984 | req.ndm.ndm_family = family; | |
3985 | if (ifindex) | |
312a6bee | 3986 | nl_attr_put32(&req.n, sizeof(req), NDA_IFINDEX, ifindex); |
d62a17ae | 3987 | |
fd3f8e52 | 3988 | return netlink_request(netlink_cmd, &req); |
2232a77c | 3989 | } |
3990 | ||
3991 | /* | |
3992 | * IP Neighbor table read using netlink interface. This is invoked | |
3993 | * at startup. | |
3994 | */ | |
d62a17ae | 3995 | int netlink_neigh_read(struct zebra_ns *zns) |
2232a77c | 3996 | { |
d62a17ae | 3997 | int ret; |
85a75f1e MS |
3998 | struct zebra_dplane_info dp_info; |
3999 | ||
4000 | zebra_dplane_info_from_zns(&dp_info, zns, true /*is_cmd*/); | |
2232a77c | 4001 | |
d62a17ae | 4002 | /* Get IP neighbor table. */ |
85a75f1e MS |
4003 | ret = netlink_request_neigh(&zns->netlink_cmd, AF_UNSPEC, RTM_GETNEIGH, |
4004 | 0); | |
d62a17ae | 4005 | if (ret < 0) |
4006 | return ret; | |
85a75f1e | 4007 | ret = netlink_parse_info(netlink_neigh_table, &zns->netlink_cmd, |
9bfadae8 | 4008 | &dp_info, 0, true); |
2232a77c | 4009 | |
d62a17ae | 4010 | return ret; |
2232a77c | 4011 | } |
4012 | ||
4013 | /* | |
4014 | * IP Neighbor table read using netlink interface. This is for a specific | |
4015 | * VLAN device. | |
4016 | */ | |
d62a17ae | 4017 | int netlink_neigh_read_for_vlan(struct zebra_ns *zns, struct interface *vlan_if) |
2232a77c | 4018 | { |
d62a17ae | 4019 | int ret = 0; |
85a75f1e MS |
4020 | struct zebra_dplane_info dp_info; |
4021 | ||
4022 | zebra_dplane_info_from_zns(&dp_info, zns, true /*is_cmd*/); | |
2232a77c | 4023 | |
85a75f1e | 4024 | ret = netlink_request_neigh(&zns->netlink_cmd, AF_UNSPEC, RTM_GETNEIGH, |
d62a17ae | 4025 | vlan_if->ifindex); |
4026 | if (ret < 0) | |
4027 | return ret; | |
85a75f1e | 4028 | ret = netlink_parse_info(netlink_neigh_table, &zns->netlink_cmd, |
9bfadae8 | 4029 | &dp_info, 0, false); |
2232a77c | 4030 | |
d62a17ae | 4031 | return ret; |
2232a77c | 4032 | } |
4033 | ||
67fb9374 CS |
4034 | /* |
4035 | * Request for a specific IP in VLAN (SVI) device from IP Neighbor table, | |
4036 | * read using netlink interface. | |
4037 | */ | |
4038 | static int netlink_request_specific_neigh_in_vlan(struct zebra_ns *zns, | |
1a3bd37f MS |
4039 | int type, |
4040 | const struct ipaddr *ip, | |
67fb9374 CS |
4041 | ifindex_t ifindex) |
4042 | { | |
4043 | struct { | |
4044 | struct nlmsghdr n; | |
4045 | struct ndmsg ndm; | |
4046 | char buf[256]; | |
4047 | } req; | |
4048 | int ipa_len; | |
4049 | ||
4050 | /* Form the request, specifying filter (rtattr) if needed. */ | |
4051 | memset(&req, 0, sizeof(req)); | |
4052 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)); | |
4053 | req.n.nlmsg_flags = NLM_F_REQUEST; | |
4054 | req.n.nlmsg_type = type; /* RTM_GETNEIGH */ | |
4055 | req.ndm.ndm_ifindex = ifindex; | |
4056 | ||
4057 | if (IS_IPADDR_V4(ip)) { | |
4058 | ipa_len = IPV4_MAX_BYTELEN; | |
4059 | req.ndm.ndm_family = AF_INET; | |
4060 | ||
4061 | } else { | |
4062 | ipa_len = IPV6_MAX_BYTELEN; | |
4063 | req.ndm.ndm_family = AF_INET6; | |
4064 | } | |
4065 | ||
312a6bee | 4066 | nl_attr_put(&req.n, sizeof(req), NDA_DST, &ip->ip.addr, ipa_len); |
67fb9374 | 4067 | |
ef7b8be4 DL |
4068 | if (IS_ZEBRA_DEBUG_KERNEL) |
4069 | zlog_debug("%s: Tx %s family %s IF %u IP %pIA flags 0x%x", | |
7c26c121 | 4070 | __func__, nl_msg_type_to_str(type), |
ef7b8be4 DL |
4071 | nl_family_to_str(req.ndm.ndm_family), ifindex, ip, |
4072 | req.n.nlmsg_flags); | |
7c26c121 | 4073 | |
fd3f8e52 | 4074 | return netlink_request(&zns->netlink_cmd, &req); |
67fb9374 CS |
4075 | } |
4076 | ||
1a3bd37f MS |
4077 | int netlink_neigh_read_specific_ip(const struct ipaddr *ip, |
4078 | struct interface *vlan_if) | |
67fb9374 CS |
4079 | { |
4080 | int ret = 0; | |
4081 | struct zebra_ns *zns; | |
096f7609 | 4082 | struct zebra_vrf *zvrf = vlan_if->vrf->info; |
67fb9374 CS |
4083 | struct zebra_dplane_info dp_info; |
4084 | ||
4085 | zns = zvrf->zns; | |
4086 | ||
4087 | zebra_dplane_info_from_zns(&dp_info, zns, true /*is_cmd*/); | |
4088 | ||
4089 | if (IS_ZEBRA_DEBUG_KERNEL) | |
ef7b8be4 DL |
4090 | zlog_debug("%s: neigh request IF %s(%u) IP %pIA vrf %s(%u)", |
4091 | __func__, vlan_if->name, vlan_if->ifindex, ip, | |
096f7609 | 4092 | vlan_if->vrf->name, vlan_if->vrf->vrf_id); |
67fb9374 CS |
4093 | |
4094 | ret = netlink_request_specific_neigh_in_vlan(zns, RTM_GETNEIGH, ip, | |
4095 | vlan_if->ifindex); | |
4096 | if (ret < 0) | |
4097 | return ret; | |
4098 | ||
4099 | ret = netlink_parse_info(netlink_neigh_table, &zns->netlink_cmd, | |
9bfadae8 | 4100 | &dp_info, 1, false); |
67fb9374 CS |
4101 | |
4102 | return ret; | |
4103 | } | |
4104 | ||
2414abd3 | 4105 | int netlink_neigh_change(struct nlmsghdr *h, ns_id_t ns_id) |
2232a77c | 4106 | { |
d62a17ae | 4107 | int len; |
4108 | struct ndmsg *ndm; | |
2232a77c | 4109 | |
7723e8d3 PG |
4110 | if (!(h->nlmsg_type == RTM_NEWNEIGH || h->nlmsg_type == RTM_DELNEIGH |
4111 | || h->nlmsg_type == RTM_GETNEIGH)) | |
d62a17ae | 4112 | return 0; |
2232a77c | 4113 | |
d62a17ae | 4114 | /* Length validity. */ |
4115 | len = h->nlmsg_len - NLMSG_LENGTH(sizeof(struct ndmsg)); | |
9bdf8618 | 4116 | if (len < 0) { |
15569c58 DA |
4117 | zlog_err( |
4118 | "%s: Message received from netlink is of a broken size %d %zu", | |
4119 | __func__, h->nlmsg_len, | |
4120 | (size_t)NLMSG_LENGTH(sizeof(struct ndmsg))); | |
d62a17ae | 4121 | return -1; |
9bdf8618 | 4122 | } |
2232a77c | 4123 | |
d62a17ae | 4124 | /* Is this a notification for the MAC FDB or IP neighbor table? */ |
4125 | ndm = NLMSG_DATA(h); | |
4126 | if (ndm->ndm_family == AF_BRIDGE) | |
2414abd3 | 4127 | return netlink_macfdb_change(h, len, ns_id); |
2232a77c | 4128 | |
d62a17ae | 4129 | if (ndm->ndm_type != RTN_UNICAST) |
4130 | return 0; | |
2232a77c | 4131 | |
d62a17ae | 4132 | if (ndm->ndm_family == AF_INET || ndm->ndm_family == AF_INET6) |
2414abd3 | 4133 | return netlink_ipneigh_change(h, len, ns_id); |
8a1b681c | 4134 | else { |
9df414fe | 4135 | flog_warn( |
e914ccbe | 4136 | EC_ZEBRA_UNKNOWN_FAMILY, |
87b5d1b0 DS |
4137 | "Invalid address family: %u received from kernel neighbor change: %s", |
4138 | ndm->ndm_family, nl_msg_type_to_str(h->nlmsg_type)); | |
8a1b681c SW |
4139 | return 0; |
4140 | } | |
2232a77c | 4141 | |
d62a17ae | 4142 | return 0; |
2232a77c | 4143 | } |
4144 | ||
931fa60c MS |
4145 | /* |
4146 | * Utility neighbor-update function, using info from dplane context. | |
4147 | */ | |
67e3369e JU |
4148 | static ssize_t netlink_neigh_update_ctx(const struct zebra_dplane_ctx *ctx, |
4149 | int cmd, void *buf, size_t buflen) | |
2232a77c | 4150 | { |
931fa60c | 4151 | const struct ipaddr *ip; |
0a27a2fe PG |
4152 | const struct ethaddr *mac = NULL; |
4153 | const struct ipaddr *link_ip = NULL; | |
4154 | const void *link_ptr = NULL; | |
4155 | char buf2[ETHER_ADDR_STRLEN]; | |
4156 | ||
4157 | int llalen; | |
931fa60c MS |
4158 | uint8_t flags; |
4159 | uint16_t state; | |
340845e2 | 4160 | uint8_t family; |
ccd187cd AK |
4161 | uint32_t update_flags; |
4162 | uint32_t ext_flags = 0; | |
4163 | bool ext = false; | |
88217099 PG |
4164 | int proto = RTPROT_ZEBRA; |
4165 | ||
4166 | if (dplane_ctx_get_type(ctx) != 0) | |
4167 | proto = zebra2proto(dplane_ctx_get_type(ctx)); | |
d62a17ae | 4168 | |
931fa60c | 4169 | ip = dplane_ctx_neigh_get_ipaddr(ctx); |
931fa60c | 4170 | |
0a27a2fe PG |
4171 | if (dplane_ctx_get_op(ctx) == DPLANE_OP_NEIGH_IP_INSTALL |
4172 | || dplane_ctx_get_op(ctx) == DPLANE_OP_NEIGH_IP_DELETE) { | |
4173 | link_ip = dplane_ctx_neigh_get_link_ip(ctx); | |
4174 | llalen = IPADDRSZ(link_ip); | |
4175 | link_ptr = (const void *)&(link_ip->ip.addr); | |
4176 | ipaddr2str(link_ip, buf2, sizeof(buf2)); | |
4177 | } else { | |
4178 | mac = dplane_ctx_neigh_get_mac(ctx); | |
4179 | llalen = ETH_ALEN; | |
4180 | link_ptr = (const void *)mac; | |
4181 | if (is_zero_mac(mac)) | |
4182 | mac = NULL; | |
4183 | if (mac) | |
4184 | prefix_mac2str(mac, buf2, sizeof(buf2)); | |
4185 | else | |
4186 | snprintf(buf2, sizeof(buf2), "null"); | |
4187 | } | |
ccd187cd | 4188 | update_flags = dplane_ctx_neigh_get_update_flags(ctx); |
931fa60c MS |
4189 | flags = neigh_flags_to_netlink(dplane_ctx_neigh_get_flags(ctx)); |
4190 | state = neigh_state_to_netlink(dplane_ctx_neigh_get_state(ctx)); | |
4191 | ||
340845e2 | 4192 | family = IS_IPADDR_V4(ip) ? AF_INET : AF_INET6; |
d62a17ae | 4193 | |
ccd187cd AK |
4194 | if (update_flags & DPLANE_NEIGH_REMOTE) { |
4195 | flags |= NTF_EXT_LEARNED; | |
4196 | /* if it was static-local previously we need to clear the | |
4197 | * ext flags on replace with remote | |
4198 | */ | |
4199 | if (update_flags & DPLANE_NEIGH_WAS_STATIC) | |
4200 | ext = true; | |
0a27a2fe | 4201 | } else if (!(update_flags & DPLANE_NEIGH_NO_EXTENSION)) { |
ccd187cd AK |
4202 | ext = true; |
4203 | /* local neigh */ | |
4204 | if (update_flags & DPLANE_NEIGH_SET_STATIC) | |
4205 | ext_flags |= NTF_E_MH_PEER_SYNC; | |
ccd187cd | 4206 | } |
ef7b8be4 | 4207 | if (IS_ZEBRA_DEBUG_KERNEL) |
340845e2 | 4208 | zlog_debug( |
0a27a2fe | 4209 | "Tx %s family %s IF %s(%u) Neigh %pIA %s %s flags 0x%x state 0x%x %sext_flags 0x%x", |
340845e2 JU |
4210 | nl_msg_type_to_str(cmd), nl_family_to_str(family), |
4211 | dplane_ctx_get_ifname(ctx), dplane_ctx_get_ifindex(ctx), | |
0a27a2fe PG |
4212 | ip, link_ip ? "Link " : "MAC ", buf2, flags, state, |
4213 | ext ? "ext " : "", ext_flags); | |
d62a17ae | 4214 | |
18f60fe9 | 4215 | return netlink_neigh_update_msg_encode( |
0a27a2fe PG |
4216 | ctx, cmd, link_ptr, llalen, ip, true, family, RTN_UNICAST, |
4217 | flags, state, 0 /*nhg*/, false /*nfy*/, 0 /*nfy_flags*/, ext, | |
88217099 | 4218 | ext_flags, buf, buflen, proto); |
2232a77c | 4219 | } |
4220 | ||
e18747a9 PG |
4221 | static int netlink_neigh_table_update_ctx(const struct zebra_dplane_ctx *ctx, |
4222 | void *data, size_t datalen) | |
4223 | { | |
4224 | struct { | |
4225 | struct nlmsghdr n; | |
4226 | struct ndtmsg ndtm; | |
4227 | char buf[]; | |
4228 | } *req = data; | |
4229 | struct rtattr *nest; | |
4230 | uint8_t family; | |
4231 | ifindex_t idx; | |
4232 | uint32_t val; | |
4233 | ||
4234 | if (datalen < sizeof(*req)) | |
4235 | return 0; | |
4236 | memset(req, 0, sizeof(*req)); | |
4237 | family = dplane_ctx_neightable_get_family(ctx); | |
4238 | idx = dplane_ctx_get_ifindex(ctx); | |
4239 | ||
4240 | req->n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndtmsg)); | |
4241 | req->n.nlmsg_flags = NLM_F_REQUEST | NLM_F_REPLACE; | |
4242 | req->n.nlmsg_type = RTM_SETNEIGHTBL; | |
4243 | req->ndtm.ndtm_family = family; | |
4244 | ||
4245 | nl_attr_put(&req->n, datalen, NDTA_NAME, | |
4246 | family == AF_INET ? "arp_cache" : "ndisc_cache", 10); | |
4247 | nest = nl_attr_nest(&req->n, datalen, NDTA_PARMS); | |
4248 | if (nest == NULL) | |
4249 | return 0; | |
4250 | if (!nl_attr_put(&req->n, datalen, NDTPA_IFINDEX, &idx, sizeof(idx))) | |
4251 | return 0; | |
4252 | val = dplane_ctx_neightable_get_app_probes(ctx); | |
4253 | if (!nl_attr_put(&req->n, datalen, NDTPA_APP_PROBES, &val, sizeof(val))) | |
4254 | return 0; | |
4255 | val = dplane_ctx_neightable_get_mcast_probes(ctx); | |
4256 | if (!nl_attr_put(&req->n, datalen, NDTPA_MCAST_PROBES, &val, | |
4257 | sizeof(val))) | |
4258 | return 0; | |
4259 | val = dplane_ctx_neightable_get_ucast_probes(ctx); | |
4260 | if (!nl_attr_put(&req->n, datalen, NDTPA_UCAST_PROBES, &val, | |
4261 | sizeof(val))) | |
4262 | return 0; | |
4263 | nl_attr_nest_end(&req->n, nest); | |
4264 | ||
4265 | return NLMSG_ALIGN(req->n.nlmsg_len); | |
4266 | } | |
4267 | ||
67e3369e JU |
4268 | static ssize_t netlink_neigh_msg_encoder(struct zebra_dplane_ctx *ctx, |
4269 | void *buf, size_t buflen) | |
2232a77c | 4270 | { |
67e3369e | 4271 | ssize_t ret; |
2232a77c | 4272 | |
931fa60c MS |
4273 | switch (dplane_ctx_get_op(ctx)) { |
4274 | case DPLANE_OP_NEIGH_INSTALL: | |
4275 | case DPLANE_OP_NEIGH_UPDATE: | |
d68e74b4 | 4276 | case DPLANE_OP_NEIGH_DISCOVER: |
0a27a2fe | 4277 | case DPLANE_OP_NEIGH_IP_INSTALL: |
67e3369e | 4278 | ret = netlink_neigh_update_ctx(ctx, RTM_NEWNEIGH, buf, buflen); |
931fa60c MS |
4279 | break; |
4280 | case DPLANE_OP_NEIGH_DELETE: | |
0a27a2fe | 4281 | case DPLANE_OP_NEIGH_IP_DELETE: |
67e3369e | 4282 | ret = netlink_neigh_update_ctx(ctx, RTM_DELNEIGH, buf, buflen); |
931fa60c | 4283 | break; |
0bbd4ff4 | 4284 | case DPLANE_OP_VTEP_ADD: |
67e3369e JU |
4285 | ret = netlink_vxlan_flood_update_ctx(ctx, RTM_NEWNEIGH, buf, |
4286 | buflen); | |
0bbd4ff4 MS |
4287 | break; |
4288 | case DPLANE_OP_VTEP_DELETE: | |
67e3369e JU |
4289 | ret = netlink_vxlan_flood_update_ctx(ctx, RTM_DELNEIGH, buf, |
4290 | buflen); | |
0bbd4ff4 | 4291 | break; |
e18747a9 PG |
4292 | case DPLANE_OP_NEIGH_TABLE_UPDATE: |
4293 | ret = netlink_neigh_table_update_ctx(ctx, buf, buflen); | |
4294 | break; | |
931fa60c | 4295 | default: |
67e3369e | 4296 | ret = -1; |
931fa60c | 4297 | } |
2232a77c | 4298 | |
67e3369e JU |
4299 | return ret; |
4300 | } | |
4301 | ||
4302 | /* | |
4303 | * Update MAC, using dataplane context object. | |
4304 | */ | |
4305 | ||
67e3369e JU |
4306 | enum netlink_msg_status netlink_put_mac_update_msg(struct nl_batch *bth, |
4307 | struct zebra_dplane_ctx *ctx) | |
4308 | { | |
4309 | return netlink_batch_add_msg(bth, ctx, netlink_macfdb_update_ctx, | |
4310 | false); | |
4311 | } | |
4312 | ||
67e3369e JU |
4313 | enum netlink_msg_status |
4314 | netlink_put_neigh_update_msg(struct nl_batch *bth, struct zebra_dplane_ctx *ctx) | |
4315 | { | |
4316 | return netlink_batch_add_msg(bth, ctx, netlink_neigh_msg_encoder, | |
4317 | false); | |
6fe2b0e6 CS |
4318 | } |
4319 | ||
16c628de MS |
4320 | /* |
4321 | * MPLS label forwarding table change via netlink interface, using dataplane | |
4322 | * context information. | |
4323 | */ | |
0be6e7d7 JU |
4324 | ssize_t netlink_mpls_multipath_msg_encode(int cmd, struct zebra_dplane_ctx *ctx, |
4325 | void *buf, size_t buflen) | |
16c628de MS |
4326 | { |
4327 | mpls_lse_t lse; | |
ee70f629 | 4328 | const struct nhlfe_list_head *head; |
f2595bd5 | 4329 | const struct zebra_nhlfe *nhlfe; |
16c628de MS |
4330 | struct nexthop *nexthop = NULL; |
4331 | unsigned int nexthop_num; | |
4332 | const char *routedesc; | |
4333 | int route_type; | |
9a0132a5 | 4334 | struct prefix p = {0}; |
d4000d7b DS |
4335 | struct nlsock *nl = |
4336 | kernel_netlink_nlsock_lookup(dplane_ctx_get_ns_sock(ctx)); | |
16c628de MS |
4337 | |
4338 | struct { | |
4339 | struct nlmsghdr n; | |
4340 | struct rtmsg r; | |
0be6e7d7 JU |
4341 | char buf[0]; |
4342 | } *req = buf; | |
4343 | ||
4344 | if (buflen < sizeof(*req)) | |
4345 | return 0; | |
16c628de | 4346 | |
0be6e7d7 | 4347 | memset(req, 0, sizeof(*req)); |
16c628de MS |
4348 | |
4349 | /* | |
4350 | * Count # nexthops so we can decide whether to use singlepath | |
4351 | * or multipath case. | |
4352 | */ | |
4353 | nexthop_num = 0; | |
ee70f629 MS |
4354 | head = dplane_ctx_get_nhlfe_list(ctx); |
4355 | frr_each(nhlfe_list_const, head, nhlfe) { | |
16c628de MS |
4356 | nexthop = nhlfe->nexthop; |
4357 | if (!nexthop) | |
4358 | continue; | |
4359 | if (cmd == RTM_NEWROUTE) { | |
4360 | /* Count all selected NHLFEs */ | |
4361 | if (CHECK_FLAG(nhlfe->flags, NHLFE_FLAG_SELECTED) | |
4362 | && CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE)) | |
4363 | nexthop_num++; | |
4364 | } else { /* DEL */ | |
4365 | /* Count all installed NHLFEs */ | |
4366 | if (CHECK_FLAG(nhlfe->flags, NHLFE_FLAG_INSTALLED) | |
4367 | && CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB)) | |
4368 | nexthop_num++; | |
4369 | } | |
4370 | } | |
4371 | ||
4372 | if ((nexthop_num == 0) || | |
4373 | (!dplane_ctx_get_best_nhlfe(ctx) && (cmd != RTM_DELROUTE))) | |
4374 | return 0; | |
4375 | ||
0be6e7d7 JU |
4376 | req->n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)); |
4377 | req->n.nlmsg_flags = NLM_F_CREATE | NLM_F_REQUEST; | |
4378 | req->n.nlmsg_type = cmd; | |
d4000d7b | 4379 | req->n.nlmsg_pid = nl->snl.nl_pid; |
16c628de | 4380 | |
0be6e7d7 JU |
4381 | req->r.rtm_family = AF_MPLS; |
4382 | req->r.rtm_table = RT_TABLE_MAIN; | |
4383 | req->r.rtm_dst_len = MPLS_LABEL_LEN_BITS; | |
4384 | req->r.rtm_scope = RT_SCOPE_UNIVERSE; | |
4385 | req->r.rtm_type = RTN_UNICAST; | |
16c628de MS |
4386 | |
4387 | if (cmd == RTM_NEWROUTE) { | |
4388 | /* We do a replace to handle update. */ | |
0be6e7d7 | 4389 | req->n.nlmsg_flags |= NLM_F_REPLACE; |
16c628de MS |
4390 | |
4391 | /* set the protocol value if installing */ | |
4392 | route_type = re_type_from_lsp_type( | |
4393 | dplane_ctx_get_best_nhlfe(ctx)->type); | |
0be6e7d7 | 4394 | req->r.rtm_protocol = zebra2proto(route_type); |
16c628de MS |
4395 | } |
4396 | ||
4397 | /* Fill destination */ | |
4398 | lse = mpls_lse_encode(dplane_ctx_get_in_label(ctx), 0, 0, 1); | |
0be6e7d7 JU |
4399 | if (!nl_attr_put(&req->n, buflen, RTA_DST, &lse, sizeof(mpls_lse_t))) |
4400 | return 0; | |
16c628de MS |
4401 | |
4402 | /* Fill nexthops (paths) based on single-path or multipath. The paths | |
4403 | * chosen depend on the operation. | |
4404 | */ | |
fc608372 | 4405 | if (nexthop_num == 1) { |
16c628de MS |
4406 | routedesc = "single-path"; |
4407 | _netlink_mpls_debug(cmd, dplane_ctx_get_in_label(ctx), | |
4408 | routedesc); | |
4409 | ||
4410 | nexthop_num = 0; | |
ee70f629 | 4411 | frr_each(nhlfe_list_const, head, nhlfe) { |
16c628de MS |
4412 | nexthop = nhlfe->nexthop; |
4413 | if (!nexthop) | |
4414 | continue; | |
4415 | ||
4416 | if ((cmd == RTM_NEWROUTE | |
4417 | && (CHECK_FLAG(nhlfe->flags, NHLFE_FLAG_SELECTED) | |
4418 | && CHECK_FLAG(nexthop->flags, | |
4419 | NEXTHOP_FLAG_ACTIVE))) | |
4420 | || (cmd == RTM_DELROUTE | |
4421 | && (CHECK_FLAG(nhlfe->flags, | |
4422 | NHLFE_FLAG_INSTALLED) | |
4423 | && CHECK_FLAG(nexthop->flags, | |
4424 | NEXTHOP_FLAG_FIB)))) { | |
4425 | /* Add the gateway */ | |
0be6e7d7 JU |
4426 | if (!_netlink_mpls_build_singlepath( |
4427 | &p, routedesc, nhlfe, &req->n, | |
4428 | &req->r, buflen, cmd)) | |
4429 | return false; | |
16c628de MS |
4430 | |
4431 | nexthop_num++; | |
4432 | break; | |
4433 | } | |
4434 | } | |
4435 | } else { /* Multipath case */ | |
312a6bee | 4436 | struct rtattr *nest; |
81793ac1 | 4437 | const union g_addr *src1 = NULL; |
16c628de | 4438 | |
0be6e7d7 JU |
4439 | nest = nl_attr_nest(&req->n, buflen, RTA_MULTIPATH); |
4440 | if (!nest) | |
4441 | return 0; | |
16c628de MS |
4442 | |
4443 | routedesc = "multipath"; | |
4444 | _netlink_mpls_debug(cmd, dplane_ctx_get_in_label(ctx), | |
4445 | routedesc); | |
4446 | ||
4447 | nexthop_num = 0; | |
ee70f629 | 4448 | frr_each(nhlfe_list_const, head, nhlfe) { |
16c628de MS |
4449 | nexthop = nhlfe->nexthop; |
4450 | if (!nexthop) | |
4451 | continue; | |
4452 | ||
16c628de MS |
4453 | if ((cmd == RTM_NEWROUTE |
4454 | && (CHECK_FLAG(nhlfe->flags, NHLFE_FLAG_SELECTED) | |
4455 | && CHECK_FLAG(nexthop->flags, | |
4456 | NEXTHOP_FLAG_ACTIVE))) | |
4457 | || (cmd == RTM_DELROUTE | |
4458 | && (CHECK_FLAG(nhlfe->flags, | |
4459 | NHLFE_FLAG_INSTALLED) | |
4460 | && CHECK_FLAG(nexthop->flags, | |
4461 | NEXTHOP_FLAG_FIB)))) { | |
4462 | nexthop_num++; | |
4463 | ||
4464 | /* Build the multipath */ | |
0be6e7d7 JU |
4465 | if (!_netlink_mpls_build_multipath( |
4466 | &p, routedesc, nhlfe, &req->n, | |
4467 | buflen, &req->r, &src1)) | |
4468 | return 0; | |
16c628de MS |
4469 | } |
4470 | } | |
4471 | ||
4472 | /* Add the multipath */ | |
0be6e7d7 | 4473 | nl_attr_nest_end(&req->n, nest); |
16c628de MS |
4474 | } |
4475 | ||
0be6e7d7 | 4476 | return NLMSG_ALIGN(req->n.nlmsg_len); |
16c628de | 4477 | } |
506efd37 AK |
4478 | |
4479 | /**************************************************************************** | |
4480 | * This code was developed in a branch that didn't have dplane APIs for | |
4481 | * MAC updates. Hence the use of the legacy style. It will be moved to | |
4482 | * the new dplane style pre-merge to master. XXX | |
4483 | */ | |
4484 | static int netlink_fdb_nh_update(uint32_t nh_id, struct in_addr vtep_ip) | |
4485 | { | |
4486 | struct { | |
4487 | struct nlmsghdr n; | |
4488 | struct nhmsg nhm; | |
4489 | char buf[256]; | |
4490 | } req; | |
4491 | int cmd = RTM_NEWNEXTHOP; | |
4492 | struct zebra_vrf *zvrf; | |
4493 | struct zebra_ns *zns; | |
4494 | ||
4495 | zvrf = zebra_vrf_get_evpn(); | |
4496 | if (!zvrf) | |
4497 | return -1; | |
4498 | zns = zvrf->zns; | |
4499 | ||
4500 | memset(&req, 0, sizeof(req)); | |
4501 | ||
4502 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct nhmsg)); | |
4503 | req.n.nlmsg_flags = NLM_F_REQUEST; | |
4504 | req.n.nlmsg_flags |= (NLM_F_CREATE | NLM_F_REPLACE); | |
4505 | req.n.nlmsg_type = cmd; | |
4506 | req.nhm.nh_family = AF_INET; | |
4507 | ||
4508 | if (!nl_attr_put32(&req.n, sizeof(req), NHA_ID, nh_id)) | |
4509 | return -1; | |
4510 | if (!nl_attr_put(&req.n, sizeof(req), NHA_FDB, NULL, 0)) | |
4511 | return -1; | |
4512 | if (!nl_attr_put(&req.n, sizeof(req), NHA_GATEWAY, | |
4513 | &vtep_ip, IPV4_MAX_BYTELEN)) | |
4514 | return -1; | |
4515 | ||
4516 | if (IS_ZEBRA_DEBUG_KERNEL || IS_ZEBRA_DEBUG_EVPN_MH_NH) { | |
9bcef951 MS |
4517 | zlog_debug("Tx %s fdb-nh 0x%x %pI4", |
4518 | nl_msg_type_to_str(cmd), nh_id, &vtep_ip); | |
506efd37 AK |
4519 | } |
4520 | ||
4521 | return netlink_talk(netlink_talk_filter, &req.n, &zns->netlink_cmd, zns, | |
9bfadae8 | 4522 | false); |
506efd37 AK |
4523 | } |
4524 | ||
4525 | static int netlink_fdb_nh_del(uint32_t nh_id) | |
4526 | { | |
4527 | struct { | |
4528 | struct nlmsghdr n; | |
4529 | struct nhmsg nhm; | |
4530 | char buf[256]; | |
4531 | } req; | |
4532 | int cmd = RTM_DELNEXTHOP; | |
4533 | struct zebra_vrf *zvrf; | |
4534 | struct zebra_ns *zns; | |
4535 | ||
4536 | zvrf = zebra_vrf_get_evpn(); | |
4537 | if (!zvrf) | |
4538 | return -1; | |
4539 | zns = zvrf->zns; | |
4540 | ||
4541 | memset(&req, 0, sizeof(req)); | |
4542 | ||
4543 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct nhmsg)); | |
4544 | req.n.nlmsg_flags = NLM_F_REQUEST; | |
4545 | req.n.nlmsg_type = cmd; | |
4546 | req.nhm.nh_family = AF_UNSPEC; | |
4547 | ||
4548 | if (!nl_attr_put32(&req.n, sizeof(req), NHA_ID, nh_id)) | |
4549 | return -1; | |
4550 | ||
4551 | if (IS_ZEBRA_DEBUG_KERNEL || IS_ZEBRA_DEBUG_EVPN_MH_NH) { | |
4552 | zlog_debug("Tx %s fdb-nh 0x%x", | |
4553 | nl_msg_type_to_str(cmd), nh_id); | |
4554 | } | |
4555 | ||
4556 | return netlink_talk(netlink_talk_filter, &req.n, &zns->netlink_cmd, zns, | |
9bfadae8 | 4557 | false); |
506efd37 AK |
4558 | } |
4559 | ||
4560 | static int netlink_fdb_nhg_update(uint32_t nhg_id, uint32_t nh_cnt, | |
4561 | struct nh_grp *nh_ids) | |
4562 | { | |
4563 | struct { | |
4564 | struct nlmsghdr n; | |
4565 | struct nhmsg nhm; | |
4566 | char buf[256]; | |
4567 | } req; | |
4568 | int cmd = RTM_NEWNEXTHOP; | |
4569 | struct zebra_vrf *zvrf; | |
4570 | struct zebra_ns *zns; | |
4571 | struct nexthop_grp grp[nh_cnt]; | |
4572 | uint32_t i; | |
4573 | ||
4574 | zvrf = zebra_vrf_get_evpn(); | |
4575 | if (!zvrf) | |
4576 | return -1; | |
4577 | zns = zvrf->zns; | |
4578 | ||
4579 | memset(&req, 0, sizeof(req)); | |
4580 | ||
4581 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct nhmsg)); | |
4582 | req.n.nlmsg_flags = NLM_F_REQUEST; | |
4583 | req.n.nlmsg_flags |= (NLM_F_CREATE | NLM_F_REPLACE); | |
4584 | req.n.nlmsg_type = cmd; | |
4585 | req.nhm.nh_family = AF_UNSPEC; | |
4586 | ||
4587 | if (!nl_attr_put32(&req.n, sizeof(req), NHA_ID, nhg_id)) | |
4588 | return -1; | |
4589 | if (!nl_attr_put(&req.n, sizeof(req), NHA_FDB, NULL, 0)) | |
4590 | return -1; | |
4591 | memset(&grp, 0, sizeof(grp)); | |
4592 | for (i = 0; i < nh_cnt; ++i) { | |
4593 | grp[i].id = nh_ids[i].id; | |
4594 | grp[i].weight = nh_ids[i].weight; | |
4595 | } | |
4596 | if (!nl_attr_put(&req.n, sizeof(req), NHA_GROUP, | |
4597 | grp, nh_cnt * sizeof(struct nexthop_grp))) | |
4598 | return -1; | |
4599 | ||
4600 | ||
4601 | if (IS_ZEBRA_DEBUG_KERNEL || IS_ZEBRA_DEBUG_EVPN_MH_NH) { | |
4602 | char vtep_str[ES_VTEP_LIST_STR_SZ]; | |
9e0c2fd1 | 4603 | char nh_buf[16]; |
506efd37 AK |
4604 | |
4605 | vtep_str[0] = '\0'; | |
4606 | for (i = 0; i < nh_cnt; ++i) { | |
9e0c2fd1 | 4607 | snprintf(nh_buf, sizeof(nh_buf), "%u ", |
506efd37 | 4608 | grp[i].id); |
9e0c2fd1 | 4609 | strlcat(vtep_str, nh_buf, sizeof(vtep_str)); |
506efd37 AK |
4610 | } |
4611 | ||
4612 | zlog_debug("Tx %s fdb-nhg 0x%x %s", | |
4613 | nl_msg_type_to_str(cmd), nhg_id, vtep_str); | |
4614 | } | |
4615 | ||
4616 | return netlink_talk(netlink_talk_filter, &req.n, &zns->netlink_cmd, zns, | |
9bfadae8 | 4617 | false); |
506efd37 AK |
4618 | } |
4619 | ||
4620 | static int netlink_fdb_nhg_del(uint32_t nhg_id) | |
4621 | { | |
4622 | return netlink_fdb_nh_del(nhg_id); | |
4623 | } | |
4624 | ||
4625 | int kernel_upd_mac_nh(uint32_t nh_id, struct in_addr vtep_ip) | |
4626 | { | |
4627 | return netlink_fdb_nh_update(nh_id, vtep_ip); | |
4628 | } | |
4629 | ||
4630 | int kernel_del_mac_nh(uint32_t nh_id) | |
4631 | { | |
4632 | return netlink_fdb_nh_del(nh_id); | |
4633 | } | |
4634 | ||
4635 | int kernel_upd_mac_nhg(uint32_t nhg_id, uint32_t nh_cnt, | |
4636 | struct nh_grp *nh_ids) | |
4637 | { | |
4638 | return netlink_fdb_nhg_update(nhg_id, nh_cnt, nh_ids); | |
4639 | } | |
4640 | ||
4641 | int kernel_del_mac_nhg(uint32_t nhg_id) | |
4642 | { | |
4643 | return netlink_fdb_nhg_del(nhg_id); | |
4644 | } | |
4645 | ||
ddfeb486 | 4646 | #endif /* HAVE_NETLINK */ |