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718e3744 | 1 | /* Kernel routing table updates using netlink over GNU/Linux system. |
2 | * Copyright (C) 1997, 98, 99 Kunihiro Ishiguro | |
3 | * | |
4 | * This file is part of GNU Zebra. | |
5 | * | |
6 | * GNU Zebra is free software; you can redistribute it and/or modify it | |
7 | * under the terms of the GNU General Public License as published by the | |
8 | * Free Software Foundation; either version 2, or (at your option) any | |
9 | * later version. | |
10 | * | |
11 | * GNU Zebra is distributed in the hope that it will be useful, but | |
12 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | * General Public License for more details. | |
15 | * | |
896014f4 DL |
16 | * You should have received a copy of the GNU General Public License along |
17 | * with this program; see the file COPYING; if not, write to the Free Software | |
18 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
718e3744 | 19 | */ |
20 | ||
21 | #include <zebra.h> | |
ddfeb486 DL |
22 | |
23 | #ifdef HAVE_NETLINK | |
24 | ||
8ccc7e80 | 25 | #include <net/if_arp.h> |
ba777396 RW |
26 | #include <linux/lwtunnel.h> |
27 | #include <linux/mpls_iptunnel.h> | |
28 | #include <linux/neighbour.h> | |
29 | #include <linux/rtnetlink.h> | |
d9f5b2f5 | 30 | #include <linux/nexthop.h> |
718e3744 | 31 | |
32 | /* Hack for GNU libc version 2. */ | |
33 | #ifndef MSG_TRUNC | |
34 | #define MSG_TRUNC 0x20 | |
35 | #endif /* MSG_TRUNC */ | |
36 | ||
37 | #include "linklist.h" | |
38 | #include "if.h" | |
39 | #include "log.h" | |
40 | #include "prefix.h" | |
41 | #include "connected.h" | |
42 | #include "table.h" | |
26e2ae36 | 43 | #include "memory.h" |
4a1ab8e4 | 44 | #include "zebra_memory.h" |
718e3744 | 45 | #include "rib.h" |
e04ab74d | 46 | #include "thread.h" |
edd7c245 | 47 | #include "privs.h" |
fb018d25 | 48 | #include "nexthop.h" |
78104b9b | 49 | #include "vrf.h" |
5e6a74d8 | 50 | #include "vty.h" |
40c7bdb0 | 51 | #include "mpls.h" |
13d60d35 | 52 | #include "vxlan.h" |
718e3744 | 53 | |
bf094f69 | 54 | #include "zebra/zapi_msg.h" |
fe18ee2d | 55 | #include "zebra/zebra_ns.h" |
7c551956 | 56 | #include "zebra/zebra_vrf.h" |
6621ca86 | 57 | #include "zebra/rt.h" |
718e3744 | 58 | #include "zebra/redistribute.h" |
59 | #include "zebra/interface.h" | |
60 | #include "zebra/debug.h" | |
12f6fb97 | 61 | #include "zebra/rtadv.h" |
567b877d | 62 | #include "zebra/zebra_ptm.h" |
40c7bdb0 | 63 | #include "zebra/zebra_mpls.h" |
1fdc9eae | 64 | #include "zebra/kernel_netlink.h" |
65 | #include "zebra/rt_netlink.h" | |
d9f5b2f5 | 66 | #include "zebra/zebra_nhg.h" |
e3be0432 | 67 | #include "zebra/zebra_mroute.h" |
2232a77c | 68 | #include "zebra/zebra_vxlan.h" |
364fed6b | 69 | #include "zebra/zebra_errors.h" |
e3be0432 | 70 | |
40c7bdb0 | 71 | #ifndef AF_MPLS |
72 | #define AF_MPLS 28 | |
73 | #endif | |
74 | ||
2232a77c | 75 | static vlanid_t filter_vlan = 0; |
76 | ||
d62a17ae | 77 | struct gw_family_t { |
d7c0a89a QY |
78 | uint16_t filler; |
79 | uint16_t family; | |
d62a17ae | 80 | union g_addr gate; |
40c7bdb0 | 81 | }; |
82 | ||
8755598a DS |
83 | char ipv4_ll_buf[16] = "169.254.0.1"; |
84 | struct in_addr ipv4_ll; | |
85 | ||
86 | /* | |
87 | * The ipv4_ll data structure is used for all 5549 | |
88 | * additions to the kernel. Let's figure out the | |
89 | * correct value one time instead for every | |
90 | * install/remove of a 5549 type route | |
91 | */ | |
d62a17ae | 92 | void rt_netlink_init(void) |
8755598a | 93 | { |
d62a17ae | 94 | inet_pton(AF_INET, ipv4_ll_buf, &ipv4_ll); |
8755598a DS |
95 | } |
96 | ||
931fa60c MS |
97 | /* |
98 | * Mapping from dataplane neighbor flags to netlink flags | |
99 | */ | |
100 | static uint8_t neigh_flags_to_netlink(uint8_t dplane_flags) | |
101 | { | |
102 | uint8_t flags = 0; | |
103 | ||
104 | if (dplane_flags & DPLANE_NTF_EXT_LEARNED) | |
105 | flags |= NTF_EXT_LEARNED; | |
106 | if (dplane_flags & DPLANE_NTF_ROUTER) | |
107 | flags |= NTF_ROUTER; | |
108 | ||
109 | return flags; | |
110 | } | |
111 | ||
112 | /* | |
113 | * Mapping from dataplane neighbor state to netlink state | |
114 | */ | |
115 | static uint16_t neigh_state_to_netlink(uint16_t dplane_state) | |
116 | { | |
117 | uint16_t state = 0; | |
118 | ||
119 | if (dplane_state & DPLANE_NUD_REACHABLE) | |
120 | state |= NUD_REACHABLE; | |
121 | if (dplane_state & DPLANE_NUD_STALE) | |
122 | state |= NUD_STALE; | |
123 | if (dplane_state & DPLANE_NUD_NOARP) | |
124 | state |= NUD_NOARP; | |
125 | if (dplane_state & DPLANE_NUD_PROBE) | |
126 | state |= NUD_PROBE; | |
127 | ||
128 | return state; | |
129 | } | |
130 | ||
131 | ||
23b1f334 DD |
132 | static inline int is_selfroute(int proto) |
133 | { | |
d62a17ae | 134 | if ((proto == RTPROT_BGP) || (proto == RTPROT_OSPF) |
d4d71f11 | 135 | || (proto == RTPROT_ZSTATIC) || (proto == RTPROT_ZEBRA) |
d62a17ae | 136 | || (proto == RTPROT_ISIS) || (proto == RTPROT_RIPNG) |
137 | || (proto == RTPROT_NHRP) || (proto == RTPROT_EIGRP) | |
915902cb | 138 | || (proto == RTPROT_LDP) || (proto == RTPROT_BABEL) |
0761368a | 139 | || (proto == RTPROT_RIP) || (proto == RTPROT_SHARP) |
da82f6b4 | 140 | || (proto == RTPROT_PBR) || (proto == RTPROT_OPENFABRIC)) { |
d62a17ae | 141 | return 1; |
142 | } | |
143 | ||
144 | return 0; | |
23b1f334 DD |
145 | } |
146 | ||
915902cb | 147 | static inline int zebra2proto(int proto) |
23b1f334 | 148 | { |
d62a17ae | 149 | switch (proto) { |
150 | case ZEBRA_ROUTE_BABEL: | |
151 | proto = RTPROT_BABEL; | |
152 | break; | |
153 | case ZEBRA_ROUTE_BGP: | |
154 | proto = RTPROT_BGP; | |
155 | break; | |
156 | case ZEBRA_ROUTE_OSPF: | |
157 | case ZEBRA_ROUTE_OSPF6: | |
158 | proto = RTPROT_OSPF; | |
159 | break; | |
160 | case ZEBRA_ROUTE_STATIC: | |
d4d71f11 | 161 | proto = RTPROT_ZSTATIC; |
d62a17ae | 162 | break; |
163 | case ZEBRA_ROUTE_ISIS: | |
164 | proto = RTPROT_ISIS; | |
165 | break; | |
166 | case ZEBRA_ROUTE_RIP: | |
167 | proto = RTPROT_RIP; | |
168 | break; | |
169 | case ZEBRA_ROUTE_RIPNG: | |
170 | proto = RTPROT_RIPNG; | |
171 | break; | |
172 | case ZEBRA_ROUTE_NHRP: | |
173 | proto = RTPROT_NHRP; | |
174 | break; | |
175 | case ZEBRA_ROUTE_EIGRP: | |
176 | proto = RTPROT_EIGRP; | |
177 | break; | |
178 | case ZEBRA_ROUTE_LDP: | |
179 | proto = RTPROT_LDP; | |
180 | break; | |
8a71d93d DS |
181 | case ZEBRA_ROUTE_SHARP: |
182 | proto = RTPROT_SHARP; | |
183 | break; | |
0761368a DS |
184 | case ZEBRA_ROUTE_PBR: |
185 | proto = RTPROT_PBR; | |
186 | break; | |
da82f6b4 CF |
187 | case ZEBRA_ROUTE_OPENFABRIC: |
188 | proto = RTPROT_OPENFABRIC; | |
189 | break; | |
a56ec5c0 DS |
190 | case ZEBRA_ROUTE_TABLE: |
191 | proto = RTPROT_ZEBRA; | |
192 | break; | |
d62a17ae | 193 | default: |
0761368a DS |
194 | /* |
195 | * When a user adds a new protocol this will show up | |
196 | * to let them know to do something about it. This | |
197 | * is intentionally a warn because we should see | |
198 | * this as part of development of a new protocol | |
199 | */ | |
9df414fe QY |
200 | zlog_debug( |
201 | "%s: Please add this protocol(%d) to proper rt_netlink.c handling", | |
202 | __PRETTY_FUNCTION__, proto); | |
d62a17ae | 203 | proto = RTPROT_ZEBRA; |
204 | break; | |
205 | } | |
206 | ||
207 | return proto; | |
23b1f334 DD |
208 | } |
209 | ||
915902cb DS |
210 | static inline int proto2zebra(int proto, int family) |
211 | { | |
212 | switch (proto) { | |
213 | case RTPROT_BABEL: | |
214 | proto = ZEBRA_ROUTE_BABEL; | |
215 | break; | |
216 | case RTPROT_BGP: | |
217 | proto = ZEBRA_ROUTE_BGP; | |
218 | break; | |
219 | case RTPROT_OSPF: | |
996c9314 LB |
220 | proto = (family == AFI_IP) ? ZEBRA_ROUTE_OSPF |
221 | : ZEBRA_ROUTE_OSPF6; | |
915902cb DS |
222 | break; |
223 | case RTPROT_ISIS: | |
224 | proto = ZEBRA_ROUTE_ISIS; | |
225 | break; | |
226 | case RTPROT_RIP: | |
227 | proto = ZEBRA_ROUTE_RIP; | |
228 | break; | |
229 | case RTPROT_RIPNG: | |
230 | proto = ZEBRA_ROUTE_RIPNG; | |
231 | break; | |
232 | case RTPROT_NHRP: | |
233 | proto = ZEBRA_ROUTE_NHRP; | |
234 | break; | |
235 | case RTPROT_EIGRP: | |
236 | proto = ZEBRA_ROUTE_EIGRP; | |
237 | break; | |
238 | case RTPROT_LDP: | |
239 | proto = ZEBRA_ROUTE_LDP; | |
240 | break; | |
241 | case RTPROT_STATIC: | |
d4d71f11 | 242 | case RTPROT_ZSTATIC: |
915902cb DS |
243 | proto = ZEBRA_ROUTE_STATIC; |
244 | break; | |
0761368a DS |
245 | case RTPROT_SHARP: |
246 | proto = ZEBRA_ROUTE_SHARP; | |
247 | break; | |
248 | case RTPROT_PBR: | |
249 | proto = ZEBRA_ROUTE_PBR; | |
250 | break; | |
da82f6b4 CF |
251 | case RTPROT_OPENFABRIC: |
252 | proto = ZEBRA_ROUTE_OPENFABRIC; | |
253 | break; | |
915902cb | 254 | default: |
0761368a DS |
255 | /* |
256 | * When a user adds a new protocol this will show up | |
257 | * to let them know to do something about it. This | |
258 | * is intentionally a warn because we should see | |
259 | * this as part of development of a new protocol | |
260 | */ | |
9df414fe QY |
261 | zlog_debug( |
262 | "%s: Please add this protocol(%d) to proper rt_netlink.c handling", | |
263 | __PRETTY_FUNCTION__, proto); | |
915902cb DS |
264 | proto = ZEBRA_ROUTE_KERNEL; |
265 | break; | |
266 | } | |
267 | return proto; | |
268 | } | |
269 | ||
12f6fb97 DS |
270 | /* |
271 | Pending: create an efficient table_id (in a tree/hash) based lookup) | |
272 | */ | |
d7c0a89a | 273 | static vrf_id_t vrf_lookup_by_table(uint32_t table_id, ns_id_t ns_id) |
12f6fb97 | 274 | { |
d62a17ae | 275 | struct vrf *vrf; |
276 | struct zebra_vrf *zvrf; | |
12f6fb97 | 277 | |
a2addae8 | 278 | RB_FOREACH (vrf, vrf_id_head, &vrfs_by_id) { |
78dd30b2 PG |
279 | zvrf = vrf->info; |
280 | if (zvrf == NULL) | |
d62a17ae | 281 | continue; |
78dd30b2 PG |
282 | /* case vrf with netns : match the netnsid */ |
283 | if (vrf_is_backend_netns()) { | |
284 | if (ns_id == zvrf_id(zvrf)) | |
285 | return zvrf_id(zvrf); | |
286 | } else { | |
287 | /* VRF is VRF_BACKEND_VRF_LITE */ | |
288 | if (zvrf->table_id != table_id) | |
289 | continue; | |
290 | return zvrf_id(zvrf); | |
291 | } | |
d62a17ae | 292 | } |
12f6fb97 | 293 | |
d62a17ae | 294 | return VRF_DEFAULT; |
12f6fb97 DS |
295 | } |
296 | ||
87da6a60 SW |
297 | /** |
298 | * @parse_encap_mpls() - Parses encapsulated mpls attributes | |
299 | * @tb: Pointer to rtattr to look for nested items in. | |
300 | * @labels: Pointer to store labels in. | |
301 | * | |
302 | * Return: Number of mpls labels found. | |
303 | */ | |
304 | static int parse_encap_mpls(struct rtattr *tb, mpls_label_t *labels) | |
305 | { | |
306 | struct rtattr *tb_encap[MPLS_IPTUNNEL_MAX + 1] = {0}; | |
307 | mpls_lse_t *lses = NULL; | |
308 | int num_labels = 0; | |
309 | uint32_t ttl = 0; | |
310 | uint32_t bos = 0; | |
311 | uint32_t exp = 0; | |
312 | mpls_label_t label = 0; | |
313 | ||
314 | netlink_parse_rtattr_nested(tb_encap, MPLS_IPTUNNEL_MAX, tb); | |
315 | lses = (mpls_lse_t *)RTA_DATA(tb_encap[MPLS_IPTUNNEL_DST]); | |
316 | while (!bos && num_labels < MPLS_MAX_LABELS) { | |
317 | mpls_lse_decode(lses[num_labels], &label, &ttl, &exp, &bos); | |
318 | labels[num_labels++] = label; | |
319 | } | |
320 | ||
321 | return num_labels; | |
322 | } | |
323 | ||
77a44d94 SW |
324 | static struct nexthop |
325 | parse_nexthop_unicast(ns_id_t ns_id, struct rtmsg *rtm, struct rtattr **tb, | |
326 | enum blackhole_type bh_type, int index, void *prefsrc, | |
20822f9d | 327 | void *gate, afi_t afi, vrf_id_t vrf_id) |
77a44d94 SW |
328 | { |
329 | struct interface *ifp = NULL; | |
330 | struct nexthop nh = {0}; | |
331 | mpls_label_t labels[MPLS_MAX_LABELS] = {0}; | |
332 | int num_labels = 0; | |
333 | ||
20822f9d | 334 | vrf_id_t nh_vrf_id = vrf_id; |
77a44d94 SW |
335 | size_t sz = (afi == AFI_IP) ? 4 : 16; |
336 | ||
337 | if (bh_type == BLACKHOLE_UNSPEC) { | |
338 | if (index && !gate) | |
339 | nh.type = NEXTHOP_TYPE_IFINDEX; | |
340 | else if (index && gate) | |
341 | nh.type = (afi == AFI_IP) ? NEXTHOP_TYPE_IPV4_IFINDEX | |
342 | : NEXTHOP_TYPE_IPV6_IFINDEX; | |
343 | else if (!index && gate) | |
344 | nh.type = (afi == AFI_IP) ? NEXTHOP_TYPE_IPV4 | |
345 | : NEXTHOP_TYPE_IPV6; | |
346 | else { | |
347 | nh.type = NEXTHOP_TYPE_BLACKHOLE; | |
348 | nh.bh_type = bh_type; | |
349 | } | |
350 | } else { | |
351 | nh.type = NEXTHOP_TYPE_BLACKHOLE; | |
352 | nh.bh_type = bh_type; | |
353 | } | |
354 | nh.ifindex = index; | |
355 | if (prefsrc) | |
356 | memcpy(&nh.src, prefsrc, sz); | |
357 | if (gate) | |
358 | memcpy(&nh.gate, gate, sz); | |
359 | ||
360 | if (index) { | |
361 | ifp = if_lookup_by_index_per_ns(zebra_ns_lookup(ns_id), index); | |
362 | if (ifp) | |
363 | nh_vrf_id = ifp->vrf_id; | |
364 | } | |
365 | nh.vrf_id = nh_vrf_id; | |
366 | ||
367 | if (tb[RTA_ENCAP] && tb[RTA_ENCAP_TYPE] | |
368 | && *(uint16_t *)RTA_DATA(tb[RTA_ENCAP_TYPE]) | |
369 | == LWTUNNEL_ENCAP_MPLS) { | |
370 | num_labels = parse_encap_mpls(tb[RTA_ENCAP], labels); | |
371 | } | |
372 | ||
373 | if (rtm->rtm_flags & RTNH_F_ONLINK) | |
374 | SET_FLAG(nh.flags, NEXTHOP_FLAG_ONLINK); | |
375 | ||
376 | if (num_labels) | |
377 | nexthop_add_labels(&nh, ZEBRA_LSP_STATIC, num_labels, labels); | |
378 | ||
379 | return nh; | |
380 | } | |
381 | ||
20822f9d SW |
382 | static uint8_t parse_multipath_nexthops_unicast(ns_id_t ns_id, |
383 | struct route_entry *re, | |
384 | struct rtmsg *rtm, | |
385 | struct rtnexthop *rtnh, | |
386 | struct rtattr **tb, | |
387 | void *prefsrc, vrf_id_t vrf_id) | |
388 | { | |
389 | void *gate = NULL; | |
390 | struct interface *ifp = NULL; | |
391 | int index = 0; | |
392 | /* MPLS labels */ | |
393 | mpls_label_t labels[MPLS_MAX_LABELS] = {0}; | |
394 | int num_labels = 0; | |
395 | struct rtattr *rtnh_tb[RTA_MAX + 1] = {}; | |
396 | ||
397 | int len = RTA_PAYLOAD(tb[RTA_MULTIPATH]); | |
398 | vrf_id_t nh_vrf_id = vrf_id; | |
399 | ||
400 | re->ng = nexthop_group_new(); | |
401 | ||
402 | for (;;) { | |
403 | struct nexthop *nh = NULL; | |
404 | ||
405 | if (len < (int)sizeof(*rtnh) || rtnh->rtnh_len > len) | |
406 | break; | |
407 | ||
408 | index = rtnh->rtnh_ifindex; | |
409 | if (index) { | |
410 | /* | |
411 | * Yes we are looking this up | |
412 | * for every nexthop and just | |
413 | * using the last one looked | |
414 | * up right now | |
415 | */ | |
416 | ifp = if_lookup_by_index_per_ns(zebra_ns_lookup(ns_id), | |
417 | index); | |
418 | if (ifp) | |
419 | nh_vrf_id = ifp->vrf_id; | |
420 | else { | |
421 | flog_warn( | |
422 | EC_ZEBRA_UNKNOWN_INTERFACE, | |
423 | "%s: Unknown interface %u specified, defaulting to VRF_DEFAULT", | |
424 | __PRETTY_FUNCTION__, index); | |
425 | nh_vrf_id = VRF_DEFAULT; | |
426 | } | |
427 | } else | |
428 | nh_vrf_id = vrf_id; | |
429 | ||
430 | if (rtnh->rtnh_len > sizeof(*rtnh)) { | |
431 | memset(rtnh_tb, 0, sizeof(rtnh_tb)); | |
432 | ||
433 | netlink_parse_rtattr(rtnh_tb, RTA_MAX, RTNH_DATA(rtnh), | |
434 | rtnh->rtnh_len - sizeof(*rtnh)); | |
435 | if (rtnh_tb[RTA_GATEWAY]) | |
436 | gate = RTA_DATA(rtnh_tb[RTA_GATEWAY]); | |
437 | if (rtnh_tb[RTA_ENCAP] && rtnh_tb[RTA_ENCAP_TYPE] | |
438 | && *(uint16_t *)RTA_DATA(rtnh_tb[RTA_ENCAP_TYPE]) | |
439 | == LWTUNNEL_ENCAP_MPLS) { | |
440 | num_labels = parse_encap_mpls( | |
441 | rtnh_tb[RTA_ENCAP], labels); | |
442 | } | |
443 | } | |
444 | ||
445 | if (gate) { | |
446 | if (rtm->rtm_family == AF_INET) { | |
447 | if (index) | |
448 | nh = route_entry_nexthop_ipv4_ifindex_add( | |
449 | re, gate, prefsrc, index, | |
450 | nh_vrf_id); | |
451 | else | |
452 | nh = route_entry_nexthop_ipv4_add( | |
453 | re, gate, prefsrc, nh_vrf_id); | |
454 | } else if (rtm->rtm_family == AF_INET6) { | |
455 | if (index) | |
456 | nh = route_entry_nexthop_ipv6_ifindex_add( | |
457 | re, gate, index, nh_vrf_id); | |
458 | else | |
459 | nh = route_entry_nexthop_ipv6_add( | |
460 | re, gate, nh_vrf_id); | |
461 | } | |
462 | } else | |
463 | nh = route_entry_nexthop_ifindex_add(re, index, | |
464 | nh_vrf_id); | |
465 | ||
466 | if (nh) { | |
467 | if (num_labels) | |
468 | nexthop_add_labels(nh, ZEBRA_LSP_STATIC, | |
469 | num_labels, labels); | |
470 | ||
471 | if (rtnh->rtnh_flags & RTNH_F_ONLINK) | |
472 | SET_FLAG(nh->flags, NEXTHOP_FLAG_ONLINK); | |
473 | } | |
474 | ||
475 | if (rtnh->rtnh_len == 0) | |
476 | break; | |
477 | ||
478 | len -= NLMSG_ALIGN(rtnh->rtnh_len); | |
479 | rtnh = RTNH_NEXT(rtnh); | |
480 | } | |
481 | ||
482 | uint8_t nhop_num = nexthop_group_nexthop_num(re->ng); | |
483 | ||
484 | if (!nhop_num) | |
485 | nexthop_group_delete(&re->ng); | |
486 | ||
487 | return nhop_num; | |
488 | } | |
489 | ||
718e3744 | 490 | /* Looking up routing table by netlink interface. */ |
2414abd3 | 491 | static int netlink_route_change_read_unicast(struct nlmsghdr *h, ns_id_t ns_id, |
d62a17ae | 492 | int startup) |
718e3744 | 493 | { |
d62a17ae | 494 | int len; |
495 | struct rtmsg *rtm; | |
496 | struct rtattr *tb[RTA_MAX + 1]; | |
d7c0a89a | 497 | uint8_t flags = 0; |
d62a17ae | 498 | struct prefix p; |
792fa92e | 499 | struct prefix_ipv6 src_p = {}; |
78dd30b2 | 500 | vrf_id_t vrf_id; |
d62a17ae | 501 | |
502 | char anyaddr[16] = {0}; | |
503 | ||
915902cb | 504 | int proto = ZEBRA_ROUTE_KERNEL; |
d62a17ae | 505 | int index = 0; |
506 | int table; | |
507 | int metric = 0; | |
d7c0a89a | 508 | uint32_t mtu = 0; |
25715c7e | 509 | uint8_t distance = 0; |
4e40b6d6 | 510 | route_tag_t tag = 0; |
fcc89a9c | 511 | uint32_t nhe_id = 0; |
d62a17ae | 512 | |
513 | void *dest = NULL; | |
514 | void *gate = NULL; | |
515 | void *prefsrc = NULL; /* IPv4 preferred source host address */ | |
516 | void *src = NULL; /* IPv6 srcdest source prefix */ | |
e655a03c | 517 | enum blackhole_type bh_type = BLACKHOLE_UNSPEC; |
d62a17ae | 518 | |
519 | rtm = NLMSG_DATA(h); | |
520 | ||
521 | if (startup && h->nlmsg_type != RTM_NEWROUTE) | |
522 | return 0; | |
e655a03c DL |
523 | switch (rtm->rtm_type) { |
524 | case RTN_UNICAST: | |
525 | break; | |
526 | case RTN_BLACKHOLE: | |
527 | bh_type = BLACKHOLE_NULL; | |
528 | break; | |
529 | case RTN_UNREACHABLE: | |
530 | bh_type = BLACKHOLE_REJECT; | |
531 | break; | |
532 | case RTN_PROHIBIT: | |
533 | bh_type = BLACKHOLE_ADMINPROHIB; | |
534 | break; | |
535 | default: | |
8c8f250b DS |
536 | if (IS_ZEBRA_DEBUG_KERNEL) |
537 | zlog_debug("Route rtm_type: %s(%d) intentionally ignoring", | |
538 | nl_rttype_to_str(rtm->rtm_type), | |
539 | rtm->rtm_type); | |
d62a17ae | 540 | return 0; |
e655a03c | 541 | } |
d62a17ae | 542 | |
543 | len = h->nlmsg_len - NLMSG_LENGTH(sizeof(struct rtmsg)); | |
9bdf8618 DS |
544 | if (len < 0) { |
545 | zlog_err("%s: Message received from netlink is of a broken size %d %zu", | |
546 | __PRETTY_FUNCTION__, h->nlmsg_len, | |
547 | (size_t)NLMSG_LENGTH(sizeof(struct rtmsg))); | |
d62a17ae | 548 | return -1; |
9bdf8618 | 549 | } |
d62a17ae | 550 | |
551 | memset(tb, 0, sizeof tb); | |
552 | netlink_parse_rtattr(tb, RTA_MAX, RTM_RTA(rtm), len); | |
553 | ||
554 | if (rtm->rtm_flags & RTM_F_CLONED) | |
555 | return 0; | |
556 | if (rtm->rtm_protocol == RTPROT_REDIRECT) | |
557 | return 0; | |
558 | if (rtm->rtm_protocol == RTPROT_KERNEL) | |
559 | return 0; | |
560 | ||
561 | if (!startup && is_selfroute(rtm->rtm_protocol) | |
6ab5222f DS |
562 | && h->nlmsg_type == RTM_NEWROUTE) { |
563 | if (IS_ZEBRA_DEBUG_KERNEL) | |
564 | zlog_debug("Route type: %d Received that we think we have originated, ignoring", | |
565 | rtm->rtm_protocol); | |
d62a17ae | 566 | return 0; |
6ab5222f | 567 | } |
d62a17ae | 568 | |
569 | /* We don't care about change notifications for the MPLS table. */ | |
570 | /* TODO: Revisit this. */ | |
571 | if (rtm->rtm_family == AF_MPLS) | |
572 | return 0; | |
573 | ||
574 | /* Table corresponding to route. */ | |
575 | if (tb[RTA_TABLE]) | |
576 | table = *(int *)RTA_DATA(tb[RTA_TABLE]); | |
577 | else | |
578 | table = rtm->rtm_table; | |
579 | ||
580 | /* Map to VRF */ | |
78dd30b2 | 581 | vrf_id = vrf_lookup_by_table(table, ns_id); |
d62a17ae | 582 | if (vrf_id == VRF_DEFAULT) { |
583 | if (!is_zebra_valid_kernel_table(table) | |
584 | && !is_zebra_main_routing_table(table)) | |
585 | return 0; | |
586 | } | |
587 | ||
588 | /* Route which inserted by Zebra. */ | |
915902cb | 589 | if (is_selfroute(rtm->rtm_protocol)) { |
d62a17ae | 590 | flags |= ZEBRA_FLAG_SELFROUTE; |
915902cb DS |
591 | proto = proto2zebra(rtm->rtm_protocol, rtm->rtm_family); |
592 | } | |
d62a17ae | 593 | if (tb[RTA_OIF]) |
594 | index = *(int *)RTA_DATA(tb[RTA_OIF]); | |
595 | ||
596 | if (tb[RTA_DST]) | |
597 | dest = RTA_DATA(tb[RTA_DST]); | |
598 | else | |
599 | dest = anyaddr; | |
600 | ||
601 | if (tb[RTA_SRC]) | |
602 | src = RTA_DATA(tb[RTA_SRC]); | |
603 | else | |
604 | src = anyaddr; | |
605 | ||
606 | if (tb[RTA_PREFSRC]) | |
607 | prefsrc = RTA_DATA(tb[RTA_PREFSRC]); | |
608 | ||
609 | if (tb[RTA_GATEWAY]) | |
610 | gate = RTA_DATA(tb[RTA_GATEWAY]); | |
611 | ||
fcc89a9c SW |
612 | if (tb[RTA_NH_ID]) |
613 | nhe_id = *(uint32_t *)RTA_DATA(tb[RTA_NH_ID]); | |
614 | ||
f19435a8 DS |
615 | if (tb[RTA_PRIORITY]) |
616 | metric = *(int *)RTA_DATA(tb[RTA_PRIORITY]); | |
d62a17ae | 617 | |
4e40b6d6 KK |
618 | #if defined(SUPPORT_REALMS) |
619 | if (tb[RTA_FLOW]) | |
620 | tag = *(uint32_t *)RTA_DATA(tb[RTA_FLOW]); | |
621 | #endif | |
622 | ||
f19435a8 DS |
623 | if (tb[RTA_METRICS]) { |
624 | struct rtattr *mxrta[RTAX_MAX + 1]; | |
d62a17ae | 625 | |
f19435a8 | 626 | memset(mxrta, 0, sizeof mxrta); |
996c9314 | 627 | netlink_parse_rtattr(mxrta, RTAX_MAX, RTA_DATA(tb[RTA_METRICS]), |
f19435a8 | 628 | RTA_PAYLOAD(tb[RTA_METRICS])); |
d62a17ae | 629 | |
f19435a8 | 630 | if (mxrta[RTAX_MTU]) |
d7c0a89a | 631 | mtu = *(uint32_t *)RTA_DATA(mxrta[RTAX_MTU]); |
d62a17ae | 632 | } |
633 | ||
634 | if (rtm->rtm_family == AF_INET) { | |
635 | p.family = AF_INET; | |
930571d2 | 636 | if (rtm->rtm_dst_len > IPV4_MAX_BITLEN) { |
e17d9b2d | 637 | zlog_err( |
75829703 | 638 | "Invalid destination prefix length: %u received from kernel route change", |
930571d2 | 639 | rtm->rtm_dst_len); |
e17d9b2d | 640 | return -1; |
930571d2 | 641 | } |
d62a17ae | 642 | memcpy(&p.u.prefix4, dest, 4); |
643 | p.prefixlen = rtm->rtm_dst_len; | |
644 | ||
1f610a1f CF |
645 | if (rtm->rtm_src_len != 0) { |
646 | char buf[PREFIX_STRLEN]; | |
9df414fe | 647 | flog_warn( |
e914ccbe | 648 | EC_ZEBRA_UNSUPPORTED_V4_SRCDEST, |
9df414fe QY |
649 | "unsupported IPv4 sourcedest route (dest %s vrf %u)", |
650 | prefix2str(&p, buf, sizeof(buf)), vrf_id); | |
1f610a1f CF |
651 | return 0; |
652 | } | |
930571d2 | 653 | |
1f610a1f CF |
654 | /* Force debug below to not display anything for source */ |
655 | src_p.prefixlen = 0; | |
d62a17ae | 656 | } else if (rtm->rtm_family == AF_INET6) { |
657 | p.family = AF_INET6; | |
930571d2 | 658 | if (rtm->rtm_dst_len > IPV6_MAX_BITLEN) { |
e17d9b2d | 659 | zlog_err( |
75829703 | 660 | "Invalid destination prefix length: %u received from kernel route change", |
930571d2 | 661 | rtm->rtm_dst_len); |
e17d9b2d | 662 | return -1; |
930571d2 | 663 | } |
d62a17ae | 664 | memcpy(&p.u.prefix6, dest, 16); |
665 | p.prefixlen = rtm->rtm_dst_len; | |
666 | ||
667 | src_p.family = AF_INET6; | |
930571d2 | 668 | if (rtm->rtm_src_len > IPV6_MAX_BITLEN) { |
e17d9b2d | 669 | zlog_err( |
75829703 | 670 | "Invalid source prefix length: %u received from kernel route change", |
930571d2 | 671 | rtm->rtm_src_len); |
e17d9b2d | 672 | return -1; |
930571d2 | 673 | } |
d62a17ae | 674 | memcpy(&src_p.prefix, src, 16); |
675 | src_p.prefixlen = rtm->rtm_src_len; | |
676 | } | |
677 | ||
25715c7e DS |
678 | /* |
679 | * For ZEBRA_ROUTE_KERNEL types: | |
680 | * | |
681 | * The metric/priority of the route received from the kernel | |
682 | * is a 32 bit number. We are going to interpret the high | |
683 | * order byte as the Admin Distance and the low order 3 bytes | |
684 | * as the metric. | |
685 | * | |
686 | * This will allow us to do two things: | |
687 | * 1) Allow the creation of kernel routes that can be | |
688 | * overridden by zebra. | |
689 | * 2) Allow the old behavior for 'most' kernel route types | |
690 | * if a user enters 'ip route ...' v4 routes get a metric | |
691 | * of 0 and v6 routes get a metric of 1024. Both of these | |
692 | * values will end up with a admin distance of 0, which | |
693 | * will cause them to win for the purposes of zebra. | |
694 | */ | |
695 | if (proto == ZEBRA_ROUTE_KERNEL) { | |
696 | distance = (metric >> 24) & 0xFF; | |
996c9314 | 697 | metric = (metric & 0x00FFFFFF); |
25715c7e DS |
698 | } |
699 | ||
d62a17ae | 700 | if (IS_ZEBRA_DEBUG_KERNEL) { |
701 | char buf[PREFIX_STRLEN]; | |
702 | char buf2[PREFIX_STRLEN]; | |
45df4e96 | 703 | zlog_debug("%s %s%s%s vrf %u(%u) metric: %d Admin Distance: %d", |
996c9314 LB |
704 | nl_msg_type_to_str(h->nlmsg_type), |
705 | prefix2str(&p, buf, sizeof(buf)), | |
706 | src_p.prefixlen ? " from " : "", | |
707 | src_p.prefixlen | |
708 | ? prefix2str(&src_p, buf2, sizeof(buf2)) | |
709 | : "", | |
45df4e96 | 710 | vrf_id, table, metric, distance); |
d62a17ae | 711 | } |
712 | ||
713 | afi_t afi = AFI_IP; | |
714 | if (rtm->rtm_family == AF_INET6) | |
715 | afi = AFI_IP6; | |
716 | ||
717 | if (h->nlmsg_type == RTM_NEWROUTE) { | |
8795f904 | 718 | |
fd36be7e | 719 | if (!tb[RTA_MULTIPATH]) { |
77a44d94 | 720 | struct nexthop nh = {0}; |
8795f904 | 721 | |
77a44d94 SW |
722 | if (!nhe_id) { |
723 | nh = parse_nexthop_unicast( | |
724 | ns_id, rtm, tb, bh_type, index, prefsrc, | |
20822f9d | 725 | gate, afi, vrf_id); |
87da6a60 | 726 | } |
4a7371e9 | 727 | rib_add(afi, SAFI_UNICAST, vrf_id, proto, 0, flags, &p, |
8032b717 SW |
728 | &src_p, &nh, nhe_id, table, metric, mtu, |
729 | distance, tag); | |
fd36be7e | 730 | } else { |
d62a17ae | 731 | /* This is a multipath route */ |
d62a17ae | 732 | struct route_entry *re; |
733 | struct rtnexthop *rtnh = | |
734 | (struct rtnexthop *)RTA_DATA(tb[RTA_MULTIPATH]); | |
d62a17ae | 735 | |
736 | re = XCALLOC(MTYPE_RE, sizeof(struct route_entry)); | |
915902cb | 737 | re->type = proto; |
25715c7e | 738 | re->distance = distance; |
d62a17ae | 739 | re->flags = flags; |
740 | re->metric = metric; | |
741 | re->mtu = mtu; | |
742 | re->vrf_id = vrf_id; | |
743 | re->table = table; | |
98572489 | 744 | re->uptime = monotime(NULL); |
4e40b6d6 | 745 | re->tag = tag; |
bbb322f2 | 746 | re->nhe_id = nhe_id; |
3c04071d | 747 | |
20822f9d SW |
748 | if (!nhe_id) { |
749 | uint8_t nhop_num = | |
750 | parse_multipath_nexthops_unicast( | |
751 | ns_id, re, rtm, rtnh, tb, | |
752 | prefsrc, vrf_id); | |
753 | ||
754 | zserv_nexthop_num_warn( | |
755 | __func__, (const struct prefix *)&p, | |
756 | nhop_num); | |
d62a17ae | 757 | } |
758 | ||
20822f9d | 759 | if (nhe_id || re->ng) |
1f610a1f CF |
760 | rib_add_multipath(afi, SAFI_UNICAST, &p, |
761 | &src_p, re); | |
20822f9d SW |
762 | else |
763 | XFREE(MTYPE_RE, re); | |
d62a17ae | 764 | } |
765 | } else { | |
fd36be7e DL |
766 | if (!tb[RTA_MULTIPATH]) { |
767 | struct nexthop nh; | |
768 | size_t sz = (afi == AFI_IP) ? 4 : 16; | |
769 | ||
770 | memset(&nh, 0, sizeof(nh)); | |
8ba5bd58 RW |
771 | if (bh_type == BLACKHOLE_UNSPEC) { |
772 | if (index && !gate) | |
773 | nh.type = NEXTHOP_TYPE_IFINDEX; | |
774 | else if (index && gate) | |
775 | nh.type = | |
776 | (afi == AFI_IP) | |
777 | ? NEXTHOP_TYPE_IPV4_IFINDEX | |
778 | : NEXTHOP_TYPE_IPV6_IFINDEX; | |
779 | else if (!index && gate) | |
780 | nh.type = (afi == AFI_IP) | |
781 | ? NEXTHOP_TYPE_IPV4 | |
60466a63 | 782 | : NEXTHOP_TYPE_IPV6; |
8ba5bd58 RW |
783 | else { |
784 | nh.type = NEXTHOP_TYPE_BLACKHOLE; | |
785 | nh.bh_type = BLACKHOLE_UNSPEC; | |
786 | } | |
787 | } else { | |
fd36be7e | 788 | nh.type = NEXTHOP_TYPE_BLACKHOLE; |
8ba5bd58 RW |
789 | nh.bh_type = bh_type; |
790 | } | |
fd36be7e DL |
791 | nh.ifindex = index; |
792 | if (gate) | |
793 | memcpy(&nh.gate, gate, sz); | |
996c9314 | 794 | rib_delete(afi, SAFI_UNICAST, vrf_id, proto, 0, flags, |
51c4ed0a DS |
795 | &p, &src_p, &nh, table, metric, distance, |
796 | true); | |
fd36be7e DL |
797 | } else { |
798 | /* XXX: need to compare the entire list of nexthops | |
799 | * here for NLM_F_APPEND stupidity */ | |
996c9314 | 800 | rib_delete(afi, SAFI_UNICAST, vrf_id, proto, 0, flags, |
51c4ed0a DS |
801 | &p, &src_p, NULL, table, metric, distance, |
802 | true); | |
d62a17ae | 803 | } |
804 | } | |
805 | ||
806 | return 0; | |
718e3744 | 807 | } |
808 | ||
e3be0432 DS |
809 | static struct mcast_route_data *mroute = NULL; |
810 | ||
2414abd3 | 811 | static int netlink_route_change_read_multicast(struct nlmsghdr *h, |
d62a17ae | 812 | ns_id_t ns_id, int startup) |
565fdc75 | 813 | { |
d62a17ae | 814 | int len; |
815 | struct rtmsg *rtm; | |
816 | struct rtattr *tb[RTA_MAX + 1]; | |
817 | struct mcast_route_data *m; | |
818 | struct mcast_route_data mr; | |
819 | int iif = 0; | |
820 | int count; | |
821 | int oif[256]; | |
822 | int oif_count = 0; | |
823 | char sbuf[40]; | |
824 | char gbuf[40]; | |
825 | char oif_list[256] = "\0"; | |
78dd30b2 | 826 | vrf_id_t vrf; |
43b5cc5e | 827 | int table; |
d62a17ae | 828 | |
829 | if (mroute) | |
830 | m = mroute; | |
831 | else { | |
832 | memset(&mr, 0, sizeof(mr)); | |
833 | m = &mr; | |
834 | } | |
835 | ||
836 | rtm = NLMSG_DATA(h); | |
837 | ||
838 | len = h->nlmsg_len - NLMSG_LENGTH(sizeof(struct rtmsg)); | |
839 | ||
840 | memset(tb, 0, sizeof tb); | |
841 | netlink_parse_rtattr(tb, RTA_MAX, RTM_RTA(rtm), len); | |
90d82769 | 842 | |
43b5cc5e DS |
843 | if (tb[RTA_TABLE]) |
844 | table = *(int *)RTA_DATA(tb[RTA_TABLE]); | |
845 | else | |
846 | table = rtm->rtm_table; | |
847 | ||
78dd30b2 | 848 | vrf = vrf_lookup_by_table(table, ns_id); |
43b5cc5e | 849 | |
d62a17ae | 850 | if (tb[RTA_IIF]) |
851 | iif = *(int *)RTA_DATA(tb[RTA_IIF]); | |
852 | ||
853 | if (tb[RTA_SRC]) | |
bd8b9272 | 854 | m->sg.src = *(struct in_addr *)RTA_DATA(tb[RTA_SRC]); |
d62a17ae | 855 | |
856 | if (tb[RTA_DST]) | |
bd8b9272 | 857 | m->sg.grp = *(struct in_addr *)RTA_DATA(tb[RTA_DST]); |
d62a17ae | 858 | |
62819462 | 859 | if (tb[RTA_EXPIRES]) |
d62a17ae | 860 | m->lastused = *(unsigned long long *)RTA_DATA(tb[RTA_EXPIRES]); |
861 | ||
862 | if (tb[RTA_MULTIPATH]) { | |
863 | struct rtnexthop *rtnh = | |
864 | (struct rtnexthop *)RTA_DATA(tb[RTA_MULTIPATH]); | |
865 | ||
866 | len = RTA_PAYLOAD(tb[RTA_MULTIPATH]); | |
867 | for (;;) { | |
868 | if (len < (int)sizeof(*rtnh) || rtnh->rtnh_len > len) | |
869 | break; | |
870 | ||
871 | oif[oif_count] = rtnh->rtnh_ifindex; | |
872 | oif_count++; | |
873 | ||
3c04071d SW |
874 | if (rtnh->rtnh_len == 0) |
875 | break; | |
876 | ||
d62a17ae | 877 | len -= NLMSG_ALIGN(rtnh->rtnh_len); |
878 | rtnh = RTNH_NEXT(rtnh); | |
879 | } | |
880 | } | |
881 | ||
882 | if (IS_ZEBRA_DEBUG_KERNEL) { | |
822c9af2 SW |
883 | struct interface *ifp = NULL; |
884 | struct zebra_vrf *zvrf = NULL; | |
885 | ||
0af35d90 RW |
886 | strlcpy(sbuf, inet_ntoa(m->sg.src), sizeof(sbuf)); |
887 | strlcpy(gbuf, inet_ntoa(m->sg.grp), sizeof(gbuf)); | |
d62a17ae | 888 | for (count = 0; count < oif_count; count++) { |
889 | ifp = if_lookup_by_index(oif[count], vrf); | |
890 | char temp[256]; | |
891 | ||
5b4256ca DS |
892 | sprintf(temp, "%s(%d) ", ifp ? ifp->name : "Unknown", |
893 | oif[count]); | |
eab4a5c2 | 894 | strlcat(oif_list, temp, sizeof(oif_list)); |
d62a17ae | 895 | } |
822c9af2 | 896 | zvrf = zebra_vrf_lookup_by_id(vrf); |
d62a17ae | 897 | ifp = if_lookup_by_index(iif, vrf); |
822c9af2 SW |
898 | zlog_debug( |
899 | "MCAST VRF: %s(%d) %s (%s,%s) IIF: %s(%d) OIF: %s jiffies: %lld", | |
900 | (zvrf ? zvrf->vrf->name : "Unknown"), vrf, | |
901 | nl_msg_type_to_str(h->nlmsg_type), sbuf, gbuf, | |
902 | ifp ? ifp->name : "Unknown", iif, oif_list, | |
903 | m->lastused); | |
90d82769 | 904 | } |
d62a17ae | 905 | return 0; |
565fdc75 DS |
906 | } |
907 | ||
2414abd3 | 908 | int netlink_route_change(struct nlmsghdr *h, ns_id_t ns_id, int startup) |
565fdc75 | 909 | { |
d62a17ae | 910 | int len; |
d62a17ae | 911 | struct rtmsg *rtm; |
912 | ||
913 | rtm = NLMSG_DATA(h); | |
914 | ||
915 | if (!(h->nlmsg_type == RTM_NEWROUTE || h->nlmsg_type == RTM_DELROUTE)) { | |
916 | /* If this is not route add/delete message print warning. */ | |
9165c5f5 | 917 | zlog_debug("Kernel message: %s NS %u", |
87b5d1b0 | 918 | nl_msg_type_to_str(h->nlmsg_type), ns_id); |
d62a17ae | 919 | return 0; |
920 | } | |
921 | ||
c25e2f1a DS |
922 | if (!(rtm->rtm_family == AF_INET || |
923 | rtm->rtm_family == AF_INET6 || | |
924 | rtm->rtm_family == RTNL_FAMILY_IPMR )) { | |
9df414fe | 925 | flog_warn( |
e914ccbe | 926 | EC_ZEBRA_UNKNOWN_FAMILY, |
87b5d1b0 DS |
927 | "Invalid address family: %u received from kernel route change: %s", |
928 | rtm->rtm_family, nl_msg_type_to_str(h->nlmsg_type)); | |
8a1b681c SW |
929 | return 0; |
930 | } | |
931 | ||
d62a17ae | 932 | /* Connected route. */ |
933 | if (IS_ZEBRA_DEBUG_KERNEL) | |
78dd30b2 | 934 | zlog_debug("%s %s %s proto %s NS %u", |
d62a17ae | 935 | nl_msg_type_to_str(h->nlmsg_type), |
936 | nl_family_to_str(rtm->rtm_family), | |
937 | nl_rttype_to_str(rtm->rtm_type), | |
78dd30b2 | 938 | nl_rtproto_to_str(rtm->rtm_protocol), ns_id); |
d62a17ae | 939 | |
d62a17ae | 940 | |
941 | len = h->nlmsg_len - NLMSG_LENGTH(sizeof(struct rtmsg)); | |
9bdf8618 DS |
942 | if (len < 0) { |
943 | zlog_err("%s: Message received from netlink is of a broken size: %d %zu", | |
944 | __PRETTY_FUNCTION__, | |
945 | h->nlmsg_len, | |
946 | (size_t)NLMSG_LENGTH(sizeof(struct rtmsg))); | |
d62a17ae | 947 | return -1; |
9bdf8618 | 948 | } |
d62a17ae | 949 | |
e655a03c | 950 | if (rtm->rtm_type == RTN_MULTICAST) |
2414abd3 | 951 | netlink_route_change_read_multicast(h, ns_id, startup); |
e655a03c | 952 | else |
2414abd3 | 953 | netlink_route_change_read_unicast(h, ns_id, startup); |
d62a17ae | 954 | return 0; |
565fdc75 DS |
955 | } |
956 | ||
289602d7 | 957 | /* Request for specific route information from the kernel */ |
d62a17ae | 958 | static int netlink_request_route(struct zebra_ns *zns, int family, int type) |
289602d7 | 959 | { |
d62a17ae | 960 | struct { |
961 | struct nlmsghdr n; | |
962 | struct rtmsg rtm; | |
963 | } req; | |
964 | ||
965 | /* Form the request, specifying filter (rtattr) if needed. */ | |
966 | memset(&req, 0, sizeof(req)); | |
967 | req.n.nlmsg_type = type; | |
718f9b0f | 968 | req.n.nlmsg_flags = NLM_F_ROOT | NLM_F_MATCH | NLM_F_REQUEST; |
d62a17ae | 969 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)); |
970 | req.rtm.rtm_family = family; | |
971 | ||
972 | return netlink_request(&zns->netlink_cmd, &req.n); | |
289602d7 | 973 | } |
974 | ||
718e3744 | 975 | /* Routing table read function using netlink interface. Only called |
976 | bootstrap time. */ | |
d62a17ae | 977 | int netlink_route_read(struct zebra_ns *zns) |
718e3744 | 978 | { |
d62a17ae | 979 | int ret; |
85a75f1e MS |
980 | struct zebra_dplane_info dp_info; |
981 | ||
982 | zebra_dplane_info_from_zns(&dp_info, zns, true /*is_cmd*/); | |
d62a17ae | 983 | |
984 | /* Get IPv4 routing table. */ | |
985 | ret = netlink_request_route(zns, AF_INET, RTM_GETROUTE); | |
986 | if (ret < 0) | |
987 | return ret; | |
988 | ret = netlink_parse_info(netlink_route_change_read_unicast, | |
85a75f1e | 989 | &zns->netlink_cmd, &dp_info, 0, 1); |
d62a17ae | 990 | if (ret < 0) |
991 | return ret; | |
992 | ||
993 | /* Get IPv6 routing table. */ | |
994 | ret = netlink_request_route(zns, AF_INET6, RTM_GETROUTE); | |
995 | if (ret < 0) | |
996 | return ret; | |
997 | ret = netlink_parse_info(netlink_route_change_read_unicast, | |
85a75f1e | 998 | &zns->netlink_cmd, &dp_info, 0, 1); |
d62a17ae | 999 | if (ret < 0) |
1000 | return ret; | |
1001 | ||
1002 | return 0; | |
718e3744 | 1003 | } |
1004 | ||
d7c0a89a QY |
1005 | static void _netlink_route_nl_add_gateway_info(uint8_t route_family, |
1006 | uint8_t gw_family, | |
d62a17ae | 1007 | struct nlmsghdr *nlmsg, |
1008 | size_t req_size, int bytelen, | |
81793ac1 | 1009 | const struct nexthop *nexthop) |
40c7bdb0 | 1010 | { |
d62a17ae | 1011 | if (route_family == AF_MPLS) { |
1012 | struct gw_family_t gw_fam; | |
1013 | ||
1014 | gw_fam.family = gw_family; | |
1015 | if (gw_family == AF_INET) | |
1016 | memcpy(&gw_fam.gate.ipv4, &nexthop->gate.ipv4, bytelen); | |
1017 | else | |
1018 | memcpy(&gw_fam.gate.ipv6, &nexthop->gate.ipv6, bytelen); | |
1019 | addattr_l(nlmsg, req_size, RTA_VIA, &gw_fam.family, | |
1020 | bytelen + 2); | |
1021 | } else { | |
1022 | if (gw_family == AF_INET) | |
1023 | addattr_l(nlmsg, req_size, RTA_GATEWAY, | |
1024 | &nexthop->gate.ipv4, bytelen); | |
1025 | else | |
1026 | addattr_l(nlmsg, req_size, RTA_GATEWAY, | |
1027 | &nexthop->gate.ipv6, bytelen); | |
1028 | } | |
40c7bdb0 | 1029 | } |
1030 | ||
d7c0a89a QY |
1031 | static void _netlink_route_rta_add_gateway_info(uint8_t route_family, |
1032 | uint8_t gw_family, | |
d62a17ae | 1033 | struct rtattr *rta, |
1034 | struct rtnexthop *rtnh, | |
1035 | size_t req_size, int bytelen, | |
81793ac1 | 1036 | const struct nexthop *nexthop) |
40c7bdb0 | 1037 | { |
d62a17ae | 1038 | if (route_family == AF_MPLS) { |
1039 | struct gw_family_t gw_fam; | |
1040 | ||
1041 | gw_fam.family = gw_family; | |
1042 | if (gw_family == AF_INET) | |
1043 | memcpy(&gw_fam.gate.ipv4, &nexthop->gate.ipv4, bytelen); | |
1044 | else | |
1045 | memcpy(&gw_fam.gate.ipv6, &nexthop->gate.ipv6, bytelen); | |
1046 | rta_addattr_l(rta, req_size, RTA_VIA, &gw_fam.family, | |
1047 | bytelen + 2); | |
1048 | rtnh->rtnh_len += RTA_LENGTH(bytelen + 2); | |
1049 | } else { | |
1050 | if (gw_family == AF_INET) | |
1051 | rta_addattr_l(rta, req_size, RTA_GATEWAY, | |
1052 | &nexthop->gate.ipv4, bytelen); | |
1053 | else | |
1054 | rta_addattr_l(rta, req_size, RTA_GATEWAY, | |
1055 | &nexthop->gate.ipv6, bytelen); | |
1056 | rtnh->rtnh_len += sizeof(struct rtattr) + bytelen; | |
1057 | } | |
40c7bdb0 | 1058 | } |
1059 | ||
fa713d9e CF |
1060 | /* This function takes a nexthop as argument and adds |
1061 | * the appropriate netlink attributes to an existing | |
1062 | * netlink message. | |
1063 | * | |
1064 | * @param routedesc: Human readable description of route type | |
1065 | * (direct/recursive, single-/multipath) | |
1066 | * @param bytelen: Length of addresses in bytes. | |
1067 | * @param nexthop: Nexthop information | |
1068 | * @param nlmsg: nlmsghdr structure to fill in. | |
1069 | * @param req_size: The size allocated for the message. | |
1070 | */ | |
d62a17ae | 1071 | static void _netlink_route_build_singlepath(const char *routedesc, int bytelen, |
81793ac1 | 1072 | const struct nexthop *nexthop, |
d62a17ae | 1073 | struct nlmsghdr *nlmsg, |
1074 | struct rtmsg *rtmsg, | |
1075 | size_t req_size, int cmd) | |
fa713d9e | 1076 | { |
8ecdb26e | 1077 | struct mpls_label_stack *nh_label; |
d62a17ae | 1078 | mpls_lse_t out_lse[MPLS_MAX_LABELS]; |
fa712963 | 1079 | int num_labels = 0; |
9a62e84b | 1080 | char label_buf[256]; |
d62a17ae | 1081 | |
1082 | /* | |
1083 | * label_buf is *only* currently used within debugging. | |
1084 | * As such when we assign it we are guarding it inside | |
1085 | * a debug test. If you want to change this make sure | |
1086 | * you fix this assumption | |
1087 | */ | |
1088 | label_buf[0] = '\0'; | |
d62a17ae | 1089 | |
fa712963 | 1090 | assert(nexthop); |
b43434ad | 1091 | char label_buf1[20]; |
d62a17ae | 1092 | |
b43434ad | 1093 | nh_label = nexthop->nh_label; |
fa712963 | 1094 | |
b43434ad SW |
1095 | for (int i = 0; nh_label && i < nh_label->num_labels; i++) { |
1096 | if (nh_label->label[i] == MPLS_LABEL_IMPLICIT_NULL) | |
1097 | continue; | |
fa712963 | 1098 | |
b43434ad SW |
1099 | if (IS_ZEBRA_DEBUG_KERNEL) { |
1100 | if (!num_labels) | |
1101 | sprintf(label_buf, "label %u", | |
1102 | nh_label->label[i]); | |
1103 | else { | |
1104 | sprintf(label_buf1, "/%u", nh_label->label[i]); | |
1105 | strlcat(label_buf, label_buf1, | |
1106 | sizeof(label_buf)); | |
d62a17ae | 1107 | } |
1108 | } | |
b43434ad SW |
1109 | |
1110 | out_lse[num_labels] = | |
1111 | mpls_lse_encode(nh_label->label[i], 0, 0, 0); | |
1112 | num_labels++; | |
fa712963 RW |
1113 | } |
1114 | ||
1115 | if (num_labels) { | |
1116 | /* Set the BoS bit */ | |
1117 | out_lse[num_labels - 1] |= htonl(1 << MPLS_LS_S_SHIFT); | |
1118 | ||
1119 | if (rtmsg->rtm_family == AF_MPLS) | |
1120 | addattr_l(nlmsg, req_size, RTA_NEWDST, &out_lse, | |
1121 | num_labels * sizeof(mpls_lse_t)); | |
1122 | else { | |
1123 | struct rtattr *nest; | |
d7c0a89a | 1124 | uint16_t encap = LWTUNNEL_ENCAP_MPLS; |
fa712963 RW |
1125 | |
1126 | addattr_l(nlmsg, req_size, RTA_ENCAP_TYPE, &encap, | |
d7c0a89a | 1127 | sizeof(uint16_t)); |
fa712963 RW |
1128 | nest = addattr_nest(nlmsg, req_size, RTA_ENCAP); |
1129 | addattr_l(nlmsg, req_size, MPLS_IPTUNNEL_DST, &out_lse, | |
1130 | num_labels * sizeof(mpls_lse_t)); | |
1131 | addattr_nest_end(nlmsg, nest); | |
66d42727 | 1132 | } |
0aabccc0 | 1133 | } |
fa713d9e | 1134 | |
d62a17ae | 1135 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ONLINK)) |
1136 | rtmsg->rtm_flags |= RTNH_F_ONLINK; | |
1137 | ||
1138 | if (rtmsg->rtm_family == AF_INET | |
1139 | && (nexthop->type == NEXTHOP_TYPE_IPV6 | |
1140 | || nexthop->type == NEXTHOP_TYPE_IPV6_IFINDEX)) { | |
1141 | rtmsg->rtm_flags |= RTNH_F_ONLINK; | |
1142 | addattr_l(nlmsg, req_size, RTA_GATEWAY, &ipv4_ll, 4); | |
1143 | addattr32(nlmsg, req_size, RTA_OIF, nexthop->ifindex); | |
1144 | ||
1145 | if (nexthop->rmap_src.ipv4.s_addr && (cmd == RTM_NEWROUTE)) | |
1146 | addattr_l(nlmsg, req_size, RTA_PREFSRC, | |
1147 | &nexthop->rmap_src.ipv4, bytelen); | |
1148 | else if (nexthop->src.ipv4.s_addr && (cmd == RTM_NEWROUTE)) | |
1149 | addattr_l(nlmsg, req_size, RTA_PREFSRC, | |
1150 | &nexthop->src.ipv4, bytelen); | |
1151 | ||
1152 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1153 | zlog_debug( | |
1154 | " 5549: _netlink_route_build_singlepath() (%s): " | |
7556c3fd | 1155 | "nexthop via %s %s if %u(%u)", |
d62a17ae | 1156 | routedesc, ipv4_ll_buf, label_buf, |
7556c3fd | 1157 | nexthop->ifindex, nexthop->vrf_id); |
d62a17ae | 1158 | return; |
0aabccc0 DD |
1159 | } |
1160 | ||
d62a17ae | 1161 | if (nexthop->type == NEXTHOP_TYPE_IPV4 |
1162 | || nexthop->type == NEXTHOP_TYPE_IPV4_IFINDEX) { | |
1163 | /* Send deletes to the kernel without specifying the next-hop */ | |
1164 | if (cmd != RTM_DELROUTE) | |
1165 | _netlink_route_nl_add_gateway_info( | |
1166 | rtmsg->rtm_family, AF_INET, nlmsg, req_size, | |
1167 | bytelen, nexthop); | |
1168 | ||
1169 | if (cmd == RTM_NEWROUTE) { | |
1170 | if (nexthop->rmap_src.ipv4.s_addr) | |
1171 | addattr_l(nlmsg, req_size, RTA_PREFSRC, | |
1172 | &nexthop->rmap_src.ipv4, bytelen); | |
1173 | else if (nexthop->src.ipv4.s_addr) | |
1174 | addattr_l(nlmsg, req_size, RTA_PREFSRC, | |
1175 | &nexthop->src.ipv4, bytelen); | |
1176 | } | |
1177 | ||
1178 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1179 | zlog_debug( | |
1180 | "netlink_route_multipath() (%s): " | |
7556c3fd | 1181 | "nexthop via %s %s if %u(%u)", |
d62a17ae | 1182 | routedesc, inet_ntoa(nexthop->gate.ipv4), |
7556c3fd | 1183 | label_buf, nexthop->ifindex, nexthop->vrf_id); |
0aabccc0 | 1184 | } |
fa713d9e | 1185 | |
d62a17ae | 1186 | if (nexthop->type == NEXTHOP_TYPE_IPV6 |
1187 | || nexthop->type == NEXTHOP_TYPE_IPV6_IFINDEX) { | |
1188 | _netlink_route_nl_add_gateway_info(rtmsg->rtm_family, AF_INET6, | |
1189 | nlmsg, req_size, bytelen, | |
1190 | nexthop); | |
1191 | ||
1192 | if (cmd == RTM_NEWROUTE) { | |
1193 | if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->rmap_src.ipv6)) | |
1194 | addattr_l(nlmsg, req_size, RTA_PREFSRC, | |
1195 | &nexthop->rmap_src.ipv6, bytelen); | |
1196 | else if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->src.ipv6)) | |
1197 | addattr_l(nlmsg, req_size, RTA_PREFSRC, | |
1198 | &nexthop->src.ipv6, bytelen); | |
1199 | } | |
fa713d9e | 1200 | |
d62a17ae | 1201 | if (IS_ZEBRA_DEBUG_KERNEL) |
1202 | zlog_debug( | |
1203 | "netlink_route_multipath() (%s): " | |
7556c3fd | 1204 | "nexthop via %s %s if %u(%u)", |
d62a17ae | 1205 | routedesc, inet6_ntoa(nexthop->gate.ipv6), |
7556c3fd | 1206 | label_buf, nexthop->ifindex, nexthop->vrf_id); |
d62a17ae | 1207 | } |
5e210522 DS |
1208 | |
1209 | /* | |
1210 | * We have the ifindex so we should always send it | |
1211 | * This is especially useful if we are doing route | |
1212 | * leaking. | |
1213 | */ | |
1214 | if (nexthop->type != NEXTHOP_TYPE_BLACKHOLE) | |
d62a17ae | 1215 | addattr32(nlmsg, req_size, RTA_OIF, nexthop->ifindex); |
1216 | ||
275565fb | 1217 | if (nexthop->type == NEXTHOP_TYPE_IFINDEX) { |
d62a17ae | 1218 | if (cmd == RTM_NEWROUTE) { |
1219 | if (nexthop->rmap_src.ipv4.s_addr) | |
1220 | addattr_l(nlmsg, req_size, RTA_PREFSRC, | |
1221 | &nexthop->rmap_src.ipv4, bytelen); | |
1222 | else if (nexthop->src.ipv4.s_addr) | |
1223 | addattr_l(nlmsg, req_size, RTA_PREFSRC, | |
1224 | &nexthop->src.ipv4, bytelen); | |
1225 | } | |
fa713d9e | 1226 | |
d62a17ae | 1227 | if (IS_ZEBRA_DEBUG_KERNEL) |
1228 | zlog_debug( | |
1229 | "netlink_route_multipath() (%s): " | |
7556c3fd DS |
1230 | "nexthop via if %u(%u)", |
1231 | routedesc, nexthop->ifindex, nexthop->vrf_id); | |
0aabccc0 | 1232 | } |
fa713d9e CF |
1233 | } |
1234 | ||
1235 | /* This function takes a nexthop as argument and | |
1236 | * appends to the given rtattr/rtnexthop pair the | |
1237 | * representation of the nexthop. If the nexthop | |
1238 | * defines a preferred source, the src parameter | |
1239 | * will be modified to point to that src, otherwise | |
1240 | * it will be kept unmodified. | |
1241 | * | |
1242 | * @param routedesc: Human readable description of route type | |
1243 | * (direct/recursive, single-/multipath) | |
1244 | * @param bytelen: Length of addresses in bytes. | |
1245 | * @param nexthop: Nexthop information | |
1246 | * @param rta: rtnetlink attribute structure | |
1247 | * @param rtnh: pointer to an rtnetlink nexthop structure | |
1248 | * @param src: pointer pointing to a location where | |
1249 | * the prefsrc should be stored. | |
1250 | */ | |
d62a17ae | 1251 | static void _netlink_route_build_multipath(const char *routedesc, int bytelen, |
81793ac1 | 1252 | const struct nexthop *nexthop, |
d62a17ae | 1253 | struct rtattr *rta, |
1254 | struct rtnexthop *rtnh, | |
1255 | struct rtmsg *rtmsg, | |
81793ac1 | 1256 | const union g_addr **src) |
fa713d9e | 1257 | { |
8ecdb26e | 1258 | struct mpls_label_stack *nh_label; |
d62a17ae | 1259 | mpls_lse_t out_lse[MPLS_MAX_LABELS]; |
fa712963 | 1260 | int num_labels = 0; |
9a62e84b | 1261 | char label_buf[256]; |
d62a17ae | 1262 | |
1263 | rtnh->rtnh_len = sizeof(*rtnh); | |
1264 | rtnh->rtnh_flags = 0; | |
1265 | rtnh->rtnh_hops = 0; | |
1266 | rta->rta_len += rtnh->rtnh_len; | |
1267 | ||
1268 | /* | |
1269 | * label_buf is *only* currently used within debugging. | |
1270 | * As such when we assign it we are guarding it inside | |
1271 | * a debug test. If you want to change this make sure | |
1272 | * you fix this assumption | |
1273 | */ | |
1274 | label_buf[0] = '\0'; | |
d62a17ae | 1275 | |
fa712963 | 1276 | assert(nexthop); |
b43434ad | 1277 | char label_buf1[20]; |
d62a17ae | 1278 | |
b43434ad | 1279 | nh_label = nexthop->nh_label; |
fa712963 | 1280 | |
b43434ad SW |
1281 | for (int i = 0; nh_label && i < nh_label->num_labels; i++) { |
1282 | if (nh_label->label[i] == MPLS_LABEL_IMPLICIT_NULL) | |
1283 | continue; | |
fa712963 | 1284 | |
b43434ad SW |
1285 | if (IS_ZEBRA_DEBUG_KERNEL) { |
1286 | if (!num_labels) | |
1287 | sprintf(label_buf, "label %u", | |
1288 | nh_label->label[i]); | |
1289 | else { | |
1290 | sprintf(label_buf1, "/%u", nh_label->label[i]); | |
1291 | strlcat(label_buf, label_buf1, | |
1292 | sizeof(label_buf)); | |
d62a17ae | 1293 | } |
1294 | } | |
b43434ad SW |
1295 | |
1296 | out_lse[num_labels] = | |
1297 | mpls_lse_encode(nh_label->label[i], 0, 0, 0); | |
1298 | num_labels++; | |
fa712963 RW |
1299 | } |
1300 | ||
1301 | if (num_labels) { | |
1302 | /* Set the BoS bit */ | |
1303 | out_lse[num_labels - 1] |= htonl(1 << MPLS_LS_S_SHIFT); | |
1304 | ||
1305 | if (rtmsg->rtm_family == AF_MPLS) { | |
1306 | rta_addattr_l(rta, NL_PKT_BUF_SIZE, RTA_NEWDST, | |
1307 | &out_lse, | |
1308 | num_labels * sizeof(mpls_lse_t)); | |
1309 | rtnh->rtnh_len += | |
1310 | RTA_LENGTH(num_labels * sizeof(mpls_lse_t)); | |
1311 | } else { | |
1312 | struct rtattr *nest; | |
d7c0a89a | 1313 | uint16_t encap = LWTUNNEL_ENCAP_MPLS; |
fa712963 RW |
1314 | int len = rta->rta_len; |
1315 | ||
1316 | rta_addattr_l(rta, NL_PKT_BUF_SIZE, RTA_ENCAP_TYPE, | |
d7c0a89a | 1317 | &encap, sizeof(uint16_t)); |
fa712963 RW |
1318 | nest = rta_nest(rta, NL_PKT_BUF_SIZE, RTA_ENCAP); |
1319 | rta_addattr_l(rta, NL_PKT_BUF_SIZE, MPLS_IPTUNNEL_DST, | |
1320 | &out_lse, | |
1321 | num_labels * sizeof(mpls_lse_t)); | |
1322 | rta_nest_end(rta, nest); | |
1323 | rtnh->rtnh_len += rta->rta_len - len; | |
66d42727 | 1324 | } |
d62a17ae | 1325 | } |
1326 | ||
1327 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ONLINK)) | |
1328 | rtnh->rtnh_flags |= RTNH_F_ONLINK; | |
1329 | ||
1330 | if (rtmsg->rtm_family == AF_INET | |
1331 | && (nexthop->type == NEXTHOP_TYPE_IPV6 | |
1332 | || nexthop->type == NEXTHOP_TYPE_IPV6_IFINDEX)) { | |
1333 | bytelen = 4; | |
1334 | rtnh->rtnh_flags |= RTNH_F_ONLINK; | |
1335 | rta_addattr_l(rta, NL_PKT_BUF_SIZE, RTA_GATEWAY, &ipv4_ll, | |
1336 | bytelen); | |
1337 | rtnh->rtnh_len += sizeof(struct rtattr) + bytelen; | |
1338 | rtnh->rtnh_ifindex = nexthop->ifindex; | |
1339 | ||
1340 | if (nexthop->rmap_src.ipv4.s_addr) | |
1341 | *src = &nexthop->rmap_src; | |
1342 | else if (nexthop->src.ipv4.s_addr) | |
1343 | *src = &nexthop->src; | |
1344 | ||
1345 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1346 | zlog_debug( | |
1347 | " 5549: netlink_route_build_multipath() (%s): " | |
1348 | "nexthop via %s %s if %u", | |
1349 | routedesc, ipv4_ll_buf, label_buf, | |
1350 | nexthop->ifindex); | |
1351 | return; | |
1352 | } | |
1353 | ||
1354 | if (nexthop->type == NEXTHOP_TYPE_IPV4 | |
1355 | || nexthop->type == NEXTHOP_TYPE_IPV4_IFINDEX) { | |
1356 | _netlink_route_rta_add_gateway_info(rtmsg->rtm_family, AF_INET, | |
1357 | rta, rtnh, NL_PKT_BUF_SIZE, | |
1358 | bytelen, nexthop); | |
1359 | if (nexthop->rmap_src.ipv4.s_addr) | |
1360 | *src = &nexthop->rmap_src; | |
1361 | else if (nexthop->src.ipv4.s_addr) | |
1362 | *src = &nexthop->src; | |
1363 | ||
1364 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1365 | zlog_debug( | |
1366 | "netlink_route_multipath() (%s): " | |
1367 | "nexthop via %s %s if %u", | |
1368 | routedesc, inet_ntoa(nexthop->gate.ipv4), | |
1369 | label_buf, nexthop->ifindex); | |
1370 | } | |
1371 | if (nexthop->type == NEXTHOP_TYPE_IPV6 | |
1372 | || nexthop->type == NEXTHOP_TYPE_IPV6_IFINDEX) { | |
1373 | _netlink_route_rta_add_gateway_info(rtmsg->rtm_family, AF_INET6, | |
1374 | rta, rtnh, NL_PKT_BUF_SIZE, | |
1375 | bytelen, nexthop); | |
1376 | ||
1377 | if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->rmap_src.ipv6)) | |
1378 | *src = &nexthop->rmap_src; | |
1379 | else if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->src.ipv6)) | |
1380 | *src = &nexthop->src; | |
1381 | ||
1382 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1383 | zlog_debug( | |
1384 | "netlink_route_multipath() (%s): " | |
1385 | "nexthop via %s %s if %u", | |
1386 | routedesc, inet6_ntoa(nexthop->gate.ipv6), | |
1387 | label_buf, nexthop->ifindex); | |
1388 | } | |
5e210522 DS |
1389 | |
1390 | /* | |
1391 | * We have figured out the ifindex so we should always send it | |
1392 | * This is especially useful if we are doing route | |
1393 | * leaking. | |
1394 | */ | |
1395 | if (nexthop->type != NEXTHOP_TYPE_BLACKHOLE) | |
1396 | rtnh->rtnh_ifindex = nexthop->ifindex; | |
1397 | ||
d62a17ae | 1398 | /* ifindex */ |
275565fb | 1399 | if (nexthop->type == NEXTHOP_TYPE_IFINDEX) { |
d62a17ae | 1400 | if (nexthop->rmap_src.ipv4.s_addr) |
1401 | *src = &nexthop->rmap_src; | |
1402 | else if (nexthop->src.ipv4.s_addr) | |
1403 | *src = &nexthop->src; | |
1404 | ||
1405 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1406 | zlog_debug( | |
1407 | "netlink_route_multipath() (%s): " | |
1408 | "nexthop via if %u", | |
1409 | routedesc, nexthop->ifindex); | |
d62a17ae | 1410 | } |
fa713d9e CF |
1411 | } |
1412 | ||
d62a17ae | 1413 | static inline void _netlink_mpls_build_singlepath(const char *routedesc, |
81793ac1 | 1414 | const zebra_nhlfe_t *nhlfe, |
d62a17ae | 1415 | struct nlmsghdr *nlmsg, |
1416 | struct rtmsg *rtmsg, | |
1417 | size_t req_size, int cmd) | |
40c7bdb0 | 1418 | { |
d62a17ae | 1419 | int bytelen; |
d7c0a89a | 1420 | uint8_t family; |
40c7bdb0 | 1421 | |
d62a17ae | 1422 | family = NHLFE_FAMILY(nhlfe); |
1423 | bytelen = (family == AF_INET ? 4 : 16); | |
1424 | _netlink_route_build_singlepath(routedesc, bytelen, nhlfe->nexthop, | |
1425 | nlmsg, rtmsg, req_size, cmd); | |
40c7bdb0 | 1426 | } |
1427 | ||
1428 | ||
1429 | static inline void | |
81793ac1 | 1430 | _netlink_mpls_build_multipath(const char *routedesc, const zebra_nhlfe_t *nhlfe, |
d62a17ae | 1431 | struct rtattr *rta, struct rtnexthop *rtnh, |
81793ac1 | 1432 | struct rtmsg *rtmsg, const union g_addr **src) |
40c7bdb0 | 1433 | { |
d62a17ae | 1434 | int bytelen; |
d7c0a89a | 1435 | uint8_t family; |
40c7bdb0 | 1436 | |
d62a17ae | 1437 | family = NHLFE_FAMILY(nhlfe); |
1438 | bytelen = (family == AF_INET ? 4 : 16); | |
1439 | _netlink_route_build_multipath(routedesc, bytelen, nhlfe->nexthop, rta, | |
1440 | rtnh, rtmsg, src); | |
40c7bdb0 | 1441 | } |
1442 | ||
1443 | ||
fa713d9e CF |
1444 | /* Log debug information for netlink_route_multipath |
1445 | * if debug logging is enabled. | |
1446 | * | |
1447 | * @param cmd: Netlink command which is to be processed | |
1448 | * @param p: Prefix for which the change is due | |
fa713d9e | 1449 | * @param family: Address family which the change concerns |
45df4e96 DS |
1450 | * @param zvrf: The vrf we are in |
1451 | * @param tableid: The table we are working on | |
fa713d9e | 1452 | */ |
86391e56 MS |
1453 | static void _netlink_route_debug(int cmd, const struct prefix *p, |
1454 | int family, vrf_id_t vrfid, | |
7556c3fd | 1455 | uint32_t tableid) |
fa713d9e | 1456 | { |
d62a17ae | 1457 | if (IS_ZEBRA_DEBUG_KERNEL) { |
1458 | char buf[PREFIX_STRLEN]; | |
1459 | zlog_debug( | |
45df4e96 DS |
1460 | "netlink_route_multipath(): %s %s vrf %u(%u)", |
1461 | nl_msg_type_to_str(cmd), | |
1462 | prefix2str(p, buf, sizeof(buf)), | |
86391e56 | 1463 | vrfid, tableid); |
d62a17ae | 1464 | } |
1465 | } | |
1466 | ||
e8968ccb SW |
1467 | static void _netlink_nexthop_debug(int cmd, uint32_t id) |
1468 | { | |
1469 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1470 | zlog_debug("netlink_nexthop(): %s, id=%u", | |
1471 | nl_msg_type_to_str(cmd), id); | |
1472 | } | |
1473 | ||
d7c0a89a | 1474 | static void _netlink_mpls_debug(int cmd, uint32_t label, const char *routedesc) |
40c7bdb0 | 1475 | { |
d62a17ae | 1476 | if (IS_ZEBRA_DEBUG_KERNEL) |
1477 | zlog_debug("netlink_mpls_multipath() (%s): %s %u/20", routedesc, | |
1478 | nl_msg_type_to_str(cmd), label); | |
fa713d9e CF |
1479 | } |
1480 | ||
d62a17ae | 1481 | static int netlink_neigh_update(int cmd, int ifindex, uint32_t addr, char *lla, |
5895d33f | 1482 | int llalen, ns_id_t ns_id) |
5c610faf | 1483 | { |
f3dbec60 | 1484 | uint8_t protocol = RTPROT_ZEBRA; |
d62a17ae | 1485 | struct { |
1486 | struct nlmsghdr n; | |
1487 | struct ndmsg ndm; | |
1488 | char buf[256]; | |
1489 | } req; | |
5c610faf | 1490 | |
5895d33f | 1491 | struct zebra_ns *zns = zebra_ns_lookup(ns_id); |
8f7d9fc0 | 1492 | |
5605ecfc | 1493 | memset(&req, 0, sizeof(req)); |
5c610faf | 1494 | |
d62a17ae | 1495 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)); |
1496 | req.n.nlmsg_flags = NLM_F_CREATE | NLM_F_REQUEST; | |
1497 | req.n.nlmsg_type = cmd; // RTM_NEWNEIGH or RTM_DELNEIGH | |
1498 | req.n.nlmsg_pid = zns->netlink_cmd.snl.nl_pid; | |
a55ba23f | 1499 | |
d62a17ae | 1500 | req.ndm.ndm_family = AF_INET; |
1501 | req.ndm.ndm_state = NUD_PERMANENT; | |
1502 | req.ndm.ndm_ifindex = ifindex; | |
1503 | req.ndm.ndm_type = RTN_UNICAST; | |
5c610faf | 1504 | |
f3dbec60 DS |
1505 | addattr_l(&req.n, sizeof(req), |
1506 | NDA_PROTOCOL, &protocol, sizeof(protocol)); | |
d62a17ae | 1507 | addattr_l(&req.n, sizeof(req), NDA_DST, &addr, 4); |
1508 | addattr_l(&req.n, sizeof(req), NDA_LLADDR, lla, llalen); | |
5c610faf | 1509 | |
d62a17ae | 1510 | return netlink_talk(netlink_talk_filter, &req.n, &zns->netlink_cmd, zns, |
1511 | 0); | |
5c610faf DS |
1512 | } |
1513 | ||
7cdb1a84 MS |
1514 | /* |
1515 | * Routing table change via netlink interface, using a dataplane context object | |
1516 | */ | |
25779064 | 1517 | static int netlink_route_multipath(int cmd, struct zebra_dplane_ctx *ctx) |
7cdb1a84 MS |
1518 | { |
1519 | int bytelen; | |
7cdb1a84 MS |
1520 | struct nexthop *nexthop = NULL; |
1521 | unsigned int nexthop_num; | |
1522 | int family; | |
1523 | const char *routedesc; | |
1524 | int setsrc = 0; | |
1525 | union g_addr src; | |
1526 | const struct prefix *p, *src_p; | |
1527 | uint32_t table_id; | |
1528 | ||
1529 | struct { | |
1530 | struct nlmsghdr n; | |
1531 | struct rtmsg r; | |
1532 | char buf[NL_PKT_BUF_SIZE]; | |
1533 | } req; | |
1534 | ||
1535 | p = dplane_ctx_get_dest(ctx); | |
1536 | src_p = dplane_ctx_get_src(ctx); | |
1537 | ||
1538 | family = PREFIX_FAMILY(p); | |
1539 | ||
5709131c | 1540 | memset(&req, 0, sizeof(req) - NL_PKT_BUF_SIZE); |
7cdb1a84 MS |
1541 | |
1542 | bytelen = (family == AF_INET ? 4 : 16); | |
1543 | ||
1544 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)); | |
1545 | req.n.nlmsg_flags = NLM_F_CREATE | NLM_F_REQUEST; | |
1546 | ||
334734a8 DS |
1547 | if ((cmd == RTM_NEWROUTE) && |
1548 | ((p->family == AF_INET) || v6_rr_semantics)) | |
1549 | req.n.nlmsg_flags |= NLM_F_REPLACE; | |
7cdb1a84 MS |
1550 | |
1551 | req.n.nlmsg_type = cmd; | |
1552 | ||
1553 | req.n.nlmsg_pid = dplane_ctx_get_ns(ctx)->nls.snl.nl_pid; | |
1554 | ||
1555 | req.r.rtm_family = family; | |
1556 | req.r.rtm_dst_len = p->prefixlen; | |
1557 | req.r.rtm_src_len = src_p ? src_p->prefixlen : 0; | |
1558 | req.r.rtm_scope = RT_SCOPE_UNIVERSE; | |
1559 | ||
5709131c | 1560 | if (cmd == RTM_DELROUTE) |
7cdb1a84 | 1561 | req.r.rtm_protocol = zebra2proto(dplane_ctx_get_old_type(ctx)); |
5709131c | 1562 | else |
7cdb1a84 | 1563 | req.r.rtm_protocol = zebra2proto(dplane_ctx_get_type(ctx)); |
7cdb1a84 MS |
1564 | |
1565 | /* | |
1566 | * blackhole routes are not RTN_UNICAST, they are | |
1567 | * RTN_ BLACKHOLE|UNREACHABLE|PROHIBIT | |
1568 | * so setting this value as a RTN_UNICAST would | |
1569 | * cause the route lookup of just the prefix | |
1570 | * to fail. So no need to specify this for | |
1571 | * the RTM_DELROUTE case | |
1572 | */ | |
1573 | if (cmd != RTM_DELROUTE) | |
1574 | req.r.rtm_type = RTN_UNICAST; | |
1575 | ||
5709131c | 1576 | addattr_l(&req.n, sizeof(req), RTA_DST, &p->u.prefix, bytelen); |
7cdb1a84 | 1577 | if (src_p) |
5709131c | 1578 | addattr_l(&req.n, sizeof(req), RTA_SRC, &src_p->u.prefix, |
7cdb1a84 MS |
1579 | bytelen); |
1580 | ||
1581 | /* Metric. */ | |
1582 | /* Hardcode the metric for all routes coming from zebra. Metric isn't | |
1583 | * used | |
1584 | * either by the kernel or by zebra. Its purely for calculating best | |
1585 | * path(s) | |
1586 | * by the routing protocol and for communicating with protocol peers. | |
1587 | */ | |
5709131c | 1588 | addattr32(&req.n, sizeof(req), RTA_PRIORITY, NL_DEFAULT_ROUTE_METRIC); |
7cdb1a84 MS |
1589 | |
1590 | #if defined(SUPPORT_REALMS) | |
1591 | { | |
1592 | route_tag_t tag; | |
1593 | ||
5709131c | 1594 | if (cmd == RTM_DELROUTE) |
7cdb1a84 | 1595 | tag = dplane_ctx_get_old_tag(ctx); |
5709131c | 1596 | else |
7cdb1a84 | 1597 | tag = dplane_ctx_get_tag(ctx); |
7cdb1a84 MS |
1598 | |
1599 | if (tag > 0 && tag <= 255) | |
5709131c | 1600 | addattr32(&req.n, sizeof(req), RTA_FLOW, tag); |
7cdb1a84 MS |
1601 | } |
1602 | #endif | |
1603 | /* Table corresponding to this route. */ | |
1604 | table_id = dplane_ctx_get_table(ctx); | |
1605 | if (table_id < 256) | |
1606 | req.r.rtm_table = table_id; | |
1607 | else { | |
1608 | req.r.rtm_table = RT_TABLE_UNSPEC; | |
5709131c | 1609 | addattr32(&req.n, sizeof(req), RTA_TABLE, table_id); |
7cdb1a84 MS |
1610 | } |
1611 | ||
1612 | _netlink_route_debug(cmd, p, family, dplane_ctx_get_vrf(ctx), table_id); | |
1613 | ||
1614 | /* | |
1615 | * If we are not updating the route and we have received | |
1616 | * a route delete, then all we need to fill in is the | |
1617 | * prefix information to tell the kernel to schwack | |
1618 | * it. | |
1619 | */ | |
1620 | if (cmd == RTM_DELROUTE) | |
1621 | goto skip; | |
1622 | ||
1623 | if (dplane_ctx_get_mtu(ctx) || dplane_ctx_get_nh_mtu(ctx)) { | |
1624 | char buf[NL_PKT_BUF_SIZE]; | |
1625 | struct rtattr *rta = (void *)buf; | |
1626 | uint32_t mtu = dplane_ctx_get_mtu(ctx); | |
1627 | uint32_t nexthop_mtu = dplane_ctx_get_nh_mtu(ctx); | |
5709131c | 1628 | |
7cdb1a84 MS |
1629 | if (!mtu || (nexthop_mtu && nexthop_mtu < mtu)) |
1630 | mtu = nexthop_mtu; | |
1631 | rta->rta_type = RTA_METRICS; | |
1632 | rta->rta_len = RTA_LENGTH(0); | |
5709131c MS |
1633 | rta_addattr_l(rta, NL_PKT_BUF_SIZE, |
1634 | RTAX_MTU, &mtu, sizeof(mtu)); | |
7cdb1a84 MS |
1635 | addattr_l(&req.n, NL_PKT_BUF_SIZE, RTA_METRICS, RTA_DATA(rta), |
1636 | RTA_PAYLOAD(rta)); | |
1637 | } | |
1638 | ||
1639 | /* Count overall nexthops so we can decide whether to use singlepath | |
5709131c MS |
1640 | * or multipath case. |
1641 | */ | |
7cdb1a84 MS |
1642 | nexthop_num = 0; |
1643 | for (ALL_NEXTHOPS_PTR(dplane_ctx_get_ng(ctx), nexthop)) { | |
1644 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_RECURSIVE)) | |
1645 | continue; | |
1646 | if (cmd == RTM_NEWROUTE && !NEXTHOP_IS_ACTIVE(nexthop->flags)) | |
1647 | continue; | |
1648 | ||
1649 | nexthop_num++; | |
1650 | } | |
1651 | ||
1652 | /* Singlepath case. */ | |
220f0f42 | 1653 | if (nexthop_num == 1) { |
7cdb1a84 MS |
1654 | nexthop_num = 0; |
1655 | for (ALL_NEXTHOPS_PTR(dplane_ctx_get_ng(ctx), nexthop)) { | |
1656 | /* | |
1657 | * So we want to cover 2 types of blackhole | |
1658 | * routes here: | |
1659 | * 1) A normal blackhole route( ala from a static | |
1660 | * install. | |
1661 | * 2) A recursively resolved blackhole route | |
1662 | */ | |
1663 | if (nexthop->type == NEXTHOP_TYPE_BLACKHOLE) { | |
1664 | switch (nexthop->bh_type) { | |
1665 | case BLACKHOLE_ADMINPROHIB: | |
1666 | req.r.rtm_type = RTN_PROHIBIT; | |
1667 | break; | |
1668 | case BLACKHOLE_REJECT: | |
1669 | req.r.rtm_type = RTN_UNREACHABLE; | |
1670 | break; | |
1671 | default: | |
1672 | req.r.rtm_type = RTN_BLACKHOLE; | |
1673 | break; | |
1674 | } | |
1675 | goto skip; | |
1676 | } | |
1677 | if (CHECK_FLAG(nexthop->flags, | |
1678 | NEXTHOP_FLAG_RECURSIVE)) { | |
5709131c MS |
1679 | |
1680 | if (setsrc) | |
1681 | continue; | |
1682 | ||
1683 | if (family == AF_INET) { | |
1684 | if (nexthop->rmap_src.ipv4.s_addr | |
1685 | != 0) { | |
1686 | src.ipv4 = | |
1687 | nexthop->rmap_src.ipv4; | |
1688 | setsrc = 1; | |
1689 | } else if (nexthop->src.ipv4.s_addr | |
1690 | != 0) { | |
1691 | src.ipv4 = | |
1692 | nexthop->src.ipv4; | |
1693 | setsrc = 1; | |
1694 | } | |
1695 | } else if (family == AF_INET6) { | |
1696 | if (!IN6_IS_ADDR_UNSPECIFIED( | |
1697 | &nexthop->rmap_src.ipv6)) { | |
1698 | src.ipv6 = | |
1699 | nexthop->rmap_src.ipv6; | |
1700 | setsrc = 1; | |
1701 | } else if ( | |
1702 | !IN6_IS_ADDR_UNSPECIFIED( | |
1703 | &nexthop->src.ipv6)) { | |
1704 | src.ipv6 = | |
1705 | nexthop->src.ipv6; | |
1706 | setsrc = 1; | |
7cdb1a84 MS |
1707 | } |
1708 | } | |
f183e380 | 1709 | continue; |
7cdb1a84 MS |
1710 | } |
1711 | ||
1712 | if ((cmd == RTM_NEWROUTE | |
1713 | && NEXTHOP_IS_ACTIVE(nexthop->flags))) { | |
1714 | routedesc = nexthop->rparent | |
1715 | ? "recursive, single-path" | |
1716 | : "single-path"; | |
1717 | ||
1718 | _netlink_route_build_singlepath( | |
1719 | routedesc, bytelen, nexthop, &req.n, | |
5709131c | 1720 | &req.r, sizeof(req), cmd); |
7cdb1a84 MS |
1721 | nexthop_num++; |
1722 | break; | |
1723 | } | |
1724 | } | |
1725 | if (setsrc && (cmd == RTM_NEWROUTE)) { | |
1726 | if (family == AF_INET) | |
5709131c | 1727 | addattr_l(&req.n, sizeof(req), RTA_PREFSRC, |
7cdb1a84 MS |
1728 | &src.ipv4, bytelen); |
1729 | else if (family == AF_INET6) | |
5709131c | 1730 | addattr_l(&req.n, sizeof(req), RTA_PREFSRC, |
7cdb1a84 MS |
1731 | &src.ipv6, bytelen); |
1732 | } | |
1733 | } else { /* Multipath case */ | |
1734 | char buf[NL_PKT_BUF_SIZE]; | |
1735 | struct rtattr *rta = (void *)buf; | |
1736 | struct rtnexthop *rtnh; | |
81793ac1 | 1737 | const union g_addr *src1 = NULL; |
7cdb1a84 MS |
1738 | |
1739 | rta->rta_type = RTA_MULTIPATH; | |
1740 | rta->rta_len = RTA_LENGTH(0); | |
1741 | rtnh = RTA_DATA(rta); | |
1742 | ||
1743 | nexthop_num = 0; | |
1744 | for (ALL_NEXTHOPS_PTR(dplane_ctx_get_ng(ctx), nexthop)) { | |
7cdb1a84 MS |
1745 | if (CHECK_FLAG(nexthop->flags, |
1746 | NEXTHOP_FLAG_RECURSIVE)) { | |
1747 | /* This only works for IPv4 now */ | |
5709131c MS |
1748 | if (setsrc) |
1749 | continue; | |
1750 | ||
1751 | if (family == AF_INET) { | |
1752 | if (nexthop->rmap_src.ipv4.s_addr | |
1753 | != 0) { | |
1754 | src.ipv4 = | |
1755 | nexthop->rmap_src.ipv4; | |
1756 | setsrc = 1; | |
1757 | } else if (nexthop->src.ipv4.s_addr | |
1758 | != 0) { | |
1759 | src.ipv4 = | |
1760 | nexthop->src.ipv4; | |
1761 | setsrc = 1; | |
1762 | } | |
1763 | } else if (family == AF_INET6) { | |
1764 | if (!IN6_IS_ADDR_UNSPECIFIED( | |
1765 | &nexthop->rmap_src.ipv6)) { | |
1766 | src.ipv6 = | |
1767 | nexthop->rmap_src.ipv6; | |
1768 | setsrc = 1; | |
1769 | } else if ( | |
1770 | !IN6_IS_ADDR_UNSPECIFIED( | |
1771 | &nexthop->src.ipv6)) { | |
1772 | src.ipv6 = | |
1773 | nexthop->src.ipv6; | |
1774 | setsrc = 1; | |
7cdb1a84 MS |
1775 | } |
1776 | } | |
78e54ded MS |
1777 | |
1778 | continue; | |
7cdb1a84 MS |
1779 | } |
1780 | ||
1781 | if ((cmd == RTM_NEWROUTE | |
1782 | && NEXTHOP_IS_ACTIVE(nexthop->flags))) { | |
1783 | routedesc = nexthop->rparent | |
1784 | ? "recursive, multipath" | |
1785 | : "multipath"; | |
1786 | nexthop_num++; | |
1787 | ||
1788 | _netlink_route_build_multipath( | |
1789 | routedesc, bytelen, nexthop, rta, rtnh, | |
1790 | &req.r, &src1); | |
1791 | rtnh = RTNH_NEXT(rtnh); | |
1792 | ||
1793 | if (!setsrc && src1) { | |
1794 | if (family == AF_INET) | |
1795 | src.ipv4 = src1->ipv4; | |
1796 | else if (family == AF_INET6) | |
1797 | src.ipv6 = src1->ipv6; | |
1798 | ||
1799 | setsrc = 1; | |
1800 | } | |
1801 | } | |
1802 | } | |
1803 | if (setsrc && (cmd == RTM_NEWROUTE)) { | |
1804 | if (family == AF_INET) | |
5709131c | 1805 | addattr_l(&req.n, sizeof(req), RTA_PREFSRC, |
7cdb1a84 MS |
1806 | &src.ipv4, bytelen); |
1807 | else if (family == AF_INET6) | |
5709131c | 1808 | addattr_l(&req.n, sizeof(req), RTA_PREFSRC, |
7cdb1a84 MS |
1809 | &src.ipv6, bytelen); |
1810 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1811 | zlog_debug("Setting source"); | |
1812 | } | |
1813 | ||
1814 | if (rta->rta_len > RTA_LENGTH(0)) | |
1815 | addattr_l(&req.n, NL_PKT_BUF_SIZE, RTA_MULTIPATH, | |
1816 | RTA_DATA(rta), RTA_PAYLOAD(rta)); | |
1817 | } | |
1818 | ||
1819 | /* If there is no useful nexthop then return. */ | |
1820 | if (nexthop_num == 0) { | |
1821 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1822 | zlog_debug( | |
1823 | "netlink_route_multipath(): No useful nexthop."); | |
1824 | return 0; | |
1825 | } | |
1826 | ||
1827 | skip: | |
7cdb1a84 MS |
1828 | /* Talk to netlink socket. */ |
1829 | return netlink_talk_info(netlink_talk_filter, &req.n, | |
1830 | dplane_ctx_get_ns(ctx), 0); | |
1831 | } | |
1832 | ||
43b5cc5e | 1833 | int kernel_get_ipmr_sg_stats(struct zebra_vrf *zvrf, void *in) |
e3be0432 | 1834 | { |
5523c156 | 1835 | uint32_t actual_table; |
d62a17ae | 1836 | int suc = 0; |
1837 | struct mcast_route_data *mr = (struct mcast_route_data *)in; | |
bd8b9272 DS |
1838 | struct { |
1839 | struct nlmsghdr n; | |
1840 | struct ndmsg ndm; | |
1841 | char buf[256]; | |
1842 | } req; | |
e3be0432 | 1843 | |
d62a17ae | 1844 | mroute = mr; |
5895d33f | 1845 | struct zebra_ns *zns; |
bd8b9272 | 1846 | |
009f8ad5 | 1847 | zns = zvrf->zns; |
5605ecfc | 1848 | memset(&req, 0, sizeof(req)); |
bd8b9272 DS |
1849 | |
1850 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)); | |
1851 | req.n.nlmsg_flags = NLM_F_REQUEST; | |
1852 | req.n.nlmsg_pid = zns->netlink_cmd.snl.nl_pid; | |
1853 | ||
1854 | req.ndm.ndm_family = RTNL_FAMILY_IPMR; | |
1855 | req.n.nlmsg_type = RTM_GETROUTE; | |
1856 | ||
1857 | addattr_l(&req.n, sizeof(req), RTA_IIF, &mroute->ifindex, 4); | |
1858 | addattr_l(&req.n, sizeof(req), RTA_OIF, &mroute->ifindex, 4); | |
1859 | addattr_l(&req.n, sizeof(req), RTA_SRC, &mroute->sg.src.s_addr, 4); | |
1860 | addattr_l(&req.n, sizeof(req), RTA_DST, &mroute->sg.grp.s_addr, 4); | |
5523c156 DS |
1861 | /* |
1862 | * What? | |
1863 | * | |
1864 | * So during the namespace cleanup we started storing | |
1865 | * the zvrf table_id for the default table as RT_TABLE_MAIN | |
1866 | * which is what the normal routing table for ip routing is. | |
1867 | * This change caused this to break our lookups of sg data | |
1868 | * because prior to this change the zvrf->table_id was 0 | |
1869 | * and when the pim multicast kernel code saw a 0, | |
1870 | * it was auto-translated to RT_TABLE_DEFAULT. But since | |
1871 | * we are now passing in RT_TABLE_MAIN there is no auto-translation | |
1872 | * and the kernel goes screw you and the delicious cookies you | |
1873 | * are trying to give me. So now we have this little hack. | |
1874 | */ | |
1875 | actual_table = (zvrf->table_id == RT_TABLE_MAIN) ? RT_TABLE_DEFAULT : | |
1876 | zvrf->table_id; | |
1877 | addattr_l(&req.n, sizeof(req), RTA_TABLE, &actual_table, 4); | |
e3be0432 | 1878 | |
bd8b9272 DS |
1879 | suc = netlink_talk(netlink_route_change_read_multicast, &req.n, |
1880 | &zns->netlink_cmd, zns, 0); | |
e3be0432 | 1881 | |
bd8b9272 | 1882 | mroute = NULL; |
d62a17ae | 1883 | return suc; |
e3be0432 DS |
1884 | } |
1885 | ||
565ce0d3 SW |
1886 | /** |
1887 | * _netlink_nexthop_build_group() - Build a nexthop_grp struct for a nlmsg | |
1888 | * | |
1889 | * @n: Netlink message header struct | |
1890 | * @req_size: Size allocated for this message | |
1891 | * @nhg_depends: List of entry dependencies | |
1892 | */ | |
1893 | static void _netlink_nexthop_build_group(struct nlmsghdr *n, size_t req_size, | |
1894 | struct list *nhg_depends) | |
1895 | { | |
1896 | int count = listcount(nhg_depends); | |
1897 | int i = 0; | |
1898 | struct nexthop_grp grp[count]; | |
1899 | struct listnode *dp_node = NULL; | |
1900 | struct nhg_depend *n_dp = NULL; | |
1901 | ||
1902 | memset(grp, 0, sizeof(grp)); | |
1903 | ||
1904 | if (count) { | |
1905 | for (ALL_LIST_ELEMENTS_RO(nhg_depends, dp_node, n_dp)) { | |
1906 | grp[i++].id = n_dp->nhe->id; | |
1907 | } | |
1908 | } | |
1909 | ||
1910 | addattr_l(n, req_size, NHA_GROUP, grp, count * sizeof(*grp)); | |
1911 | } | |
1912 | ||
f820d025 SW |
1913 | /** |
1914 | * netlink_nexthop() - Nexthop change via the netlink interface | |
1915 | * | |
1916 | * @ctx: Dataplane ctx | |
1917 | * | |
1918 | * Return: Result status | |
1919 | */ | |
1920 | static int netlink_nexthop(int cmd, struct zebra_dplane_ctx *ctx) | |
1921 | { | |
f820d025 SW |
1922 | struct { |
1923 | struct nlmsghdr n; | |
1924 | struct nhmsg nhm; | |
1925 | char buf[NL_PKT_BUF_SIZE]; | |
1926 | } req; | |
1927 | ||
1928 | memset(&req, 0, sizeof(req)); | |
1929 | ||
1930 | const struct nhg_hash_entry *nhe = dplane_ctx_get_nhe(ctx); | |
1931 | ||
1932 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct nhmsg)); | |
1933 | req.n.nlmsg_flags = NLM_F_CREATE | NLM_F_REQUEST; | |
1934 | req.n.nlmsg_type = cmd; | |
4f096395 | 1935 | req.n.nlmsg_pid = dplane_ctx_get_ns(ctx)->nls.snl.nl_pid; |
f820d025 SW |
1936 | |
1937 | req.nhm.nh_family = AF_UNSPEC; | |
1938 | // TODO: Scope? | |
1939 | ||
1940 | if (!nhe->id) { | |
f820d025 SW |
1941 | flog_err( |
1942 | EC_ZEBRA_NHG_FIB_UPDATE, | |
1943 | "Failed trying to update a nexthop group in the kernel that does not have an ID"); | |
1944 | return -1; | |
1945 | } | |
1946 | ||
1947 | addattr32(&req.n, sizeof(req), NHA_ID, nhe->id); | |
1948 | ||
1949 | if (cmd == RTM_NEWNEXTHOP) { | |
565ce0d3 SW |
1950 | if (nhe->nhg_depends) { |
1951 | _netlink_nexthop_build_group(&req.n, sizeof(req), | |
1952 | nhe->nhg_depends); | |
1953 | } else { | |
1954 | const struct nexthop *nh = nhe->nhg->nexthop; | |
e8b0e420 | 1955 | |
565ce0d3 SW |
1956 | if (nhe->afi == AFI_IP) |
1957 | req.nhm.nh_family = AF_INET; | |
1958 | else if (nhe->afi == AFI_IP6) | |
1959 | req.nhm.nh_family = AF_INET6; | |
f820d025 | 1960 | |
565ce0d3 SW |
1961 | switch (nh->type) { |
1962 | case NEXTHOP_TYPE_IPV4_IFINDEX: | |
1963 | addattr_l(&req.n, sizeof(req), NHA_GATEWAY, | |
1964 | &nh->gate.ipv4, IPV4_MAX_BYTELEN); | |
1965 | break; | |
1966 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
1967 | addattr_l(&req.n, sizeof(req), NHA_GATEWAY, | |
1968 | &nh->gate.ipv6, IPV6_MAX_BYTELEN); | |
1969 | break; | |
1970 | case NEXTHOP_TYPE_BLACKHOLE: | |
1971 | // TODO: Handle this | |
1972 | addattr_l(&req.n, sizeof(req), NHA_BLACKHOLE, | |
1973 | NULL, 0); | |
1974 | break; | |
1975 | case NEXTHOP_TYPE_IFINDEX: | |
1976 | /* Don't need anymore info for this */ | |
1977 | break; | |
1978 | case NEXTHOP_TYPE_IPV4: | |
1979 | case NEXTHOP_TYPE_IPV6: | |
1980 | flog_err( | |
1981 | EC_ZEBRA_NHG_FIB_UPDATE, | |
1982 | "Context received for kernel nexthop update without an interface"); | |
1983 | return -1; | |
1984 | break; | |
1985 | } | |
1986 | ||
1987 | addattr32(&req.n, sizeof(req), NHA_OIF, nh->ifindex); | |
1988 | // TODO: Handle Encap | |
f820d025 SW |
1989 | } |
1990 | ||
f820d025 SW |
1991 | req.nhm.nh_protocol = zebra2proto(dplane_ctx_get_type(ctx)); |
1992 | ||
f820d025 SW |
1993 | } else if (cmd != RTM_DELNEXTHOP) { |
1994 | flog_err( | |
1995 | EC_ZEBRA_NHG_FIB_UPDATE, | |
1996 | "Nexthop group kernel update command (%d) does not exist", | |
1997 | cmd); | |
1998 | return -1; | |
1999 | } | |
2000 | ||
e1536fce | 2001 | _netlink_nexthop_debug(cmd, nhe->id); |
f820d025 SW |
2002 | |
2003 | return netlink_talk_info(netlink_talk_filter, &req.n, | |
2004 | dplane_ctx_get_ns(ctx), 0); | |
2005 | } | |
2006 | ||
2007 | /** | |
2008 | * kernel_nexthop_update() - Update/delete a nexthop from the kernel | |
2009 | * | |
2010 | * @ctx: Dataplane context | |
2011 | * | |
2012 | * Return: Dataplane result flag | |
2013 | */ | |
2014 | enum zebra_dplane_result kernel_nexthop_update(struct zebra_dplane_ctx *ctx) | |
2015 | { | |
2016 | int cmd, ret = 0; | |
2017 | ||
2018 | switch (dplane_ctx_get_op(ctx)) { | |
2019 | case DPLANE_OP_NH_DELETE: | |
2020 | cmd = RTM_DELNEXTHOP; | |
2021 | break; | |
2022 | case DPLANE_OP_NH_INSTALL: | |
2023 | case DPLANE_OP_NH_UPDATE: | |
2024 | cmd = RTM_NEWNEXTHOP; | |
2025 | break; | |
2026 | case DPLANE_OP_ROUTE_INSTALL: | |
2027 | case DPLANE_OP_ROUTE_UPDATE: | |
2028 | case DPLANE_OP_ROUTE_DELETE: | |
2029 | case DPLANE_OP_ROUTE_NOTIFY: | |
2030 | case DPLANE_OP_LSP_INSTALL: | |
2031 | case DPLANE_OP_LSP_UPDATE: | |
2032 | case DPLANE_OP_LSP_DELETE: | |
2033 | case DPLANE_OP_LSP_NOTIFY: | |
2034 | case DPLANE_OP_PW_INSTALL: | |
2035 | case DPLANE_OP_PW_UNINSTALL: | |
2036 | case DPLANE_OP_SYS_ROUTE_ADD: | |
2037 | case DPLANE_OP_SYS_ROUTE_DELETE: | |
2038 | case DPLANE_OP_ADDR_INSTALL: | |
2039 | case DPLANE_OP_ADDR_UNINSTALL: | |
2040 | case DPLANE_OP_MAC_INSTALL: | |
2041 | case DPLANE_OP_MAC_DELETE: | |
2042 | case DPLANE_OP_NONE: | |
2043 | flog_err( | |
2044 | EC_ZEBRA_NHG_FIB_UPDATE, | |
2045 | "Context received for kernel nexthop update with incorrect OP code (%u)", | |
2046 | dplane_ctx_get_op(ctx)); | |
2047 | return ZEBRA_DPLANE_REQUEST_FAILURE; | |
2048 | break; | |
2049 | } | |
2050 | ||
2051 | ret = netlink_nexthop(cmd, ctx); | |
2052 | ||
2053 | return (ret == 0 ? ZEBRA_DPLANE_REQUEST_SUCCESS | |
2054 | : ZEBRA_DPLANE_REQUEST_FAILURE); | |
2055 | } | |
2056 | ||
7cdb1a84 MS |
2057 | /* |
2058 | * Update or delete a prefix from the kernel, | |
2059 | * using info from a dataplane context. | |
2060 | */ | |
25779064 | 2061 | enum zebra_dplane_result kernel_route_update(struct zebra_dplane_ctx *ctx) |
7cdb1a84 MS |
2062 | { |
2063 | int cmd, ret; | |
2064 | const struct prefix *p = dplane_ctx_get_dest(ctx); | |
f183e380 | 2065 | struct nexthop *nexthop; |
7cdb1a84 MS |
2066 | |
2067 | if (dplane_ctx_get_op(ctx) == DPLANE_OP_ROUTE_DELETE) { | |
2068 | cmd = RTM_DELROUTE; | |
2069 | } else if (dplane_ctx_get_op(ctx) == DPLANE_OP_ROUTE_INSTALL) { | |
2070 | cmd = RTM_NEWROUTE; | |
2071 | } else if (dplane_ctx_get_op(ctx) == DPLANE_OP_ROUTE_UPDATE) { | |
2072 | ||
2073 | if (p->family == AF_INET || v6_rr_semantics) { | |
2074 | /* Single 'replace' operation */ | |
2075 | cmd = RTM_NEWROUTE; | |
fe5f21af DS |
2076 | |
2077 | /* | |
2078 | * With route replace semantics in place | |
2079 | * for v4 routes and the new route is a system | |
2080 | * route we do not install anything. | |
2081 | * The problem here is that the new system | |
2082 | * route should cause us to withdraw from | |
2083 | * the kernel the old non-system route | |
2084 | */ | |
2085 | if (RSYSTEM_ROUTE(dplane_ctx_get_type(ctx)) && | |
2086 | !RSYSTEM_ROUTE(dplane_ctx_get_old_type(ctx))) | |
2087 | (void)netlink_route_multipath(RTM_DELROUTE, | |
2088 | ctx); | |
7cdb1a84 MS |
2089 | } else { |
2090 | /* | |
2091 | * So v6 route replace semantics are not in | |
2092 | * the kernel at this point as I understand it. | |
2093 | * so let's do a delete then an add. | |
2094 | * In the future once v6 route replace semantics | |
2095 | * are in we can figure out what to do here to | |
2096 | * allow working with old and new kernels. | |
2097 | * | |
2098 | * I'm also intentionally ignoring the failure case | |
2099 | * of the route delete. If that happens yeah we're | |
2100 | * screwed. | |
2101 | */ | |
3cdba47a DS |
2102 | if (!RSYSTEM_ROUTE(dplane_ctx_get_old_type(ctx))) |
2103 | (void)netlink_route_multipath(RTM_DELROUTE, | |
2104 | ctx); | |
7cdb1a84 MS |
2105 | cmd = RTM_NEWROUTE; |
2106 | } | |
2107 | ||
2108 | } else { | |
2109 | return ZEBRA_DPLANE_REQUEST_FAILURE; | |
2110 | } | |
2111 | ||
3cdba47a DS |
2112 | if (!RSYSTEM_ROUTE(dplane_ctx_get_type(ctx))) |
2113 | ret = netlink_route_multipath(cmd, ctx); | |
2114 | else | |
2115 | ret = 0; | |
f183e380 MS |
2116 | if ((cmd == RTM_NEWROUTE) && (ret == 0)) { |
2117 | /* Update installed nexthops to signal which have been | |
2118 | * installed. | |
2119 | */ | |
2120 | for (ALL_NEXTHOPS_PTR(dplane_ctx_get_ng(ctx), nexthop)) { | |
2121 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_RECURSIVE)) | |
2122 | continue; | |
2123 | ||
2124 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE)) { | |
2125 | SET_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB); | |
f183e380 MS |
2126 | } |
2127 | } | |
2128 | } | |
7cdb1a84 MS |
2129 | |
2130 | return (ret == 0 ? | |
2131 | ZEBRA_DPLANE_REQUEST_SUCCESS : ZEBRA_DPLANE_REQUEST_FAILURE); | |
2132 | } | |
2133 | ||
d9f5b2f5 SW |
2134 | /** |
2135 | * netlink_nexthop_process_nh() - Parse the gatway/if info from a new nexthop | |
2136 | * | |
2137 | * @tb: Netlink RTA data | |
2138 | * @family: Address family in the nhmsg | |
8c0a24c1 | 2139 | * @ifp: Interface connected - this should be NULL, we fill it in |
d9f5b2f5 SW |
2140 | * @ns_id: Namspace id |
2141 | * | |
2142 | * Return: New nexthop | |
2143 | */ | |
8e401b25 SW |
2144 | static struct nexthop *netlink_nexthop_process_nh(struct rtattr **tb, |
2145 | unsigned char family, | |
2146 | struct interface **ifp, | |
2147 | ns_id_t ns_id) | |
d9f5b2f5 | 2148 | { |
8e401b25 | 2149 | struct nexthop *nh = NULL; |
d9f5b2f5 | 2150 | void *gate = NULL; |
8e401b25 | 2151 | enum nexthop_types_t type = 0; |
d9f5b2f5 SW |
2152 | int if_index; |
2153 | size_t sz; | |
2154 | ||
2155 | if_index = *(int *)RTA_DATA(tb[NHA_OIF]); | |
2156 | ||
8e401b25 | 2157 | |
d9f5b2f5 SW |
2158 | if (tb[NHA_GATEWAY]) { |
2159 | switch (family) { | |
2160 | case AF_INET: | |
8e401b25 | 2161 | type = NEXTHOP_TYPE_IPV4_IFINDEX; |
d9f5b2f5 SW |
2162 | sz = 4; |
2163 | break; | |
2164 | case AF_INET6: | |
8e401b25 | 2165 | type = NEXTHOP_TYPE_IPV6_IFINDEX; |
d9f5b2f5 SW |
2166 | sz = 16; |
2167 | break; | |
2168 | default: | |
2169 | flog_warn( | |
2170 | EC_ZEBRA_BAD_NHG_MESSAGE, | |
c4239c05 | 2171 | "Nexthop gateway with bad address family (%d) received from kernel", |
d9f5b2f5 | 2172 | family); |
8e401b25 | 2173 | return NULL; |
d9f5b2f5 SW |
2174 | } |
2175 | gate = RTA_DATA(tb[NHA_GATEWAY]); | |
d9f5b2f5 | 2176 | } else { |
8e401b25 | 2177 | type = NEXTHOP_TYPE_IFINDEX; |
d9f5b2f5 SW |
2178 | } |
2179 | ||
8e401b25 SW |
2180 | /* Allocate the new nexthop */ |
2181 | nh = nexthop_new(); | |
d9f5b2f5 | 2182 | |
8e401b25 SW |
2183 | if (type) |
2184 | nh->type = type; | |
2185 | ||
2186 | if (gate) | |
2187 | memcpy(&(nh->gate), gate, sz); | |
2188 | ||
2189 | if (if_index) | |
2190 | nh->ifindex = if_index; | |
2191 | ||
2192 | *ifp = if_lookup_by_index_per_ns(zebra_ns_lookup(ns_id), nh->ifindex); | |
d9f5b2f5 | 2193 | if (ifp) { |
8e401b25 | 2194 | nh->vrf_id = (*ifp)->vrf_id; |
d9f5b2f5 SW |
2195 | } else { |
2196 | flog_warn( | |
2197 | EC_ZEBRA_UNKNOWN_INTERFACE, | |
2198 | "%s: Unknown nexthop interface %u received, defaulting to VRF_DEFAULT", | |
8e401b25 | 2199 | __PRETTY_FUNCTION__, nh->ifindex); |
d9f5b2f5 | 2200 | |
8e401b25 | 2201 | nh->vrf_id = VRF_DEFAULT; |
d9f5b2f5 SW |
2202 | } |
2203 | ||
2204 | if (tb[NHA_ENCAP] && tb[NHA_ENCAP_TYPE]) { | |
2205 | uint16_t encap_type = *(uint16_t *)RTA_DATA(tb[NHA_ENCAP_TYPE]); | |
2206 | int num_labels = 0; | |
2207 | mpls_label_t labels[MPLS_MAX_LABELS] = {0}; | |
2208 | ||
2209 | if (encap_type == LWTUNNEL_ENCAP_MPLS) { | |
2210 | num_labels = parse_encap_mpls(tb[NHA_ENCAP], labels); | |
2211 | } | |
2212 | ||
2213 | if (num_labels) { | |
8e401b25 | 2214 | nexthop_add_labels(nh, ZEBRA_LSP_STATIC, num_labels, |
d9f5b2f5 SW |
2215 | labels); |
2216 | } | |
2217 | } | |
2218 | ||
2219 | return nh; | |
2220 | } | |
2221 | ||
2222 | /** | |
2223 | * netlink_nexthop_process_group() - Iterate over nhmsg nexthop group | |
2224 | * | |
85f5e761 SW |
2225 | * @tb: Netlink RTA data |
2226 | * @nhg_depends: List of nexthops in the group (depends) | |
2227 | * @nhg: Nexthop group struct | |
d9f5b2f5 | 2228 | * |
85f5e761 | 2229 | * Return: Count of nexthops in the group |
d9f5b2f5 | 2230 | */ |
85f5e761 SW |
2231 | static int netlink_nexthop_process_group(struct rtattr **tb, |
2232 | struct nexthop_group *nhg, | |
2233 | struct list **nhg_depends) | |
d9f5b2f5 | 2234 | { |
85f5e761 | 2235 | int count = 0; |
d9f5b2f5 | 2236 | struct nexthop_grp *n_grp = NULL; |
85f5e761 | 2237 | struct nhg_hash_entry *depend = NULL; |
d9f5b2f5 | 2238 | |
85f5e761 | 2239 | n_grp = (struct nexthop_grp *)RTA_DATA(tb[NHA_GROUP]); |
d9f5b2f5 SW |
2240 | count = (RTA_PAYLOAD(tb[NHA_GROUP]) / sizeof(*n_grp)); |
2241 | ||
2242 | if (!count || (count * sizeof(*n_grp)) != RTA_PAYLOAD(tb[NHA_GROUP])) { | |
2243 | flog_warn(EC_ZEBRA_BAD_NHG_MESSAGE, | |
2244 | "Invalid nexthop group received from the kernel"); | |
85f5e761 | 2245 | return count; |
d9f5b2f5 SW |
2246 | } |
2247 | ||
2248 | // TODO: Need type for something? | |
85f5e761 SW |
2249 | zlog_debug("Nexthop group type: %d", |
2250 | *((uint16_t *)RTA_DATA(tb[NHA_GROUP_TYPE]))); | |
d9f5b2f5 | 2251 | |
85f5e761 | 2252 | *nhg_depends = nhg_depend_new_list(); |
d9f5b2f5 SW |
2253 | |
2254 | for (int i = 0; i < count; i++) { | |
d9f5b2f5 SW |
2255 | /* We do not care about nexthop_grp.weight at |
2256 | * this time. But we should figure out | |
2257 | * how to adapt this to our code in | |
2258 | * the future. | |
2259 | */ | |
85f5e761 SW |
2260 | depend = zebra_nhg_lookup_id(n_grp[i].id); |
2261 | if (depend) { | |
2262 | nhg_depend_add(*nhg_depends, depend); | |
2263 | /* | |
2264 | * If this is a nexthop with its own group | |
2265 | * dependencies, add them as well. Not sure its | |
2266 | * even possible to have a group within a group | |
2267 | * in the kernel. | |
2268 | */ | |
d9f5b2f5 | 2269 | |
8e401b25 SW |
2270 | copy_nexthops(&nhg->nexthop, depend->nhg->nexthop, |
2271 | NULL); | |
85f5e761 SW |
2272 | } else { |
2273 | flog_err( | |
2274 | EC_ZEBRA_NHG_SYNC, | |
2275 | "Received Nexthop Group from the kernel with a dependent Nexthop ID (%u) which we do not have in our table", | |
2276 | n_grp[i].id); | |
2277 | } | |
2278 | } | |
d9f5b2f5 SW |
2279 | return count; |
2280 | } | |
2281 | ||
2282 | /** | |
2283 | * netlink_nexthop_change() - Read in change about nexthops from the kernel | |
2284 | * | |
2285 | * @h: Netlink message header | |
2286 | * @ns_id: Namspace id | |
2287 | * @startup: Are we reading under startup conditions? | |
2288 | * | |
2289 | * Return: Result status | |
2290 | */ | |
2291 | int netlink_nexthop_change(struct nlmsghdr *h, ns_id_t ns_id, int startup) | |
2292 | { | |
2293 | int len; | |
2294 | /* nexthop group id */ | |
2295 | uint32_t id; | |
2296 | unsigned char family; | |
e8b0e420 | 2297 | afi_t afi = AFI_UNSPEC; |
55eeb2ae | 2298 | vrf_id_t vrf_id = VRF_DEFAULT; |
8c0a24c1 | 2299 | struct interface *ifp = NULL; |
d9f5b2f5 SW |
2300 | struct nhmsg *nhm = NULL; |
2301 | /* struct for nexthop group abstraction */ | |
8e401b25 SW |
2302 | struct nexthop_group *nhg = NULL; |
2303 | struct nexthop *nh = NULL; | |
85f5e761 SW |
2304 | /* If its a group, array of nexthops */ |
2305 | struct list *nhg_depends = NULL; | |
2306 | /* Count of nexthops in group array */ | |
2307 | int dep_count = 0; | |
d9f5b2f5 SW |
2308 | /* struct that goes into our tables */ |
2309 | struct nhg_hash_entry *nhe = NULL; | |
2310 | struct rtattr *tb[NHA_MAX + 1]; | |
2311 | ||
2312 | ||
2313 | nhm = NLMSG_DATA(h); | |
2314 | ||
2315 | if (startup && h->nlmsg_type != RTM_NEWNEXTHOP) | |
2316 | return 0; | |
2317 | ||
2318 | len = h->nlmsg_len - NLMSG_LENGTH(sizeof(struct nhmsg)); | |
2319 | if (len < 0) { | |
2320 | zlog_warn( | |
2321 | "%s: Message received from netlink is of a broken size %d %zu", | |
2322 | __PRETTY_FUNCTION__, h->nlmsg_len, | |
2323 | (size_t)NLMSG_LENGTH(sizeof(struct nhmsg))); | |
2324 | return -1; | |
2325 | } | |
2326 | ||
2327 | memset(tb, 0, sizeof(tb)); | |
2328 | netlink_parse_rtattr(tb, NHA_MAX, RTM_NHA(nhm), len); | |
2329 | ||
2330 | ||
2331 | if (!tb[NHA_ID]) { | |
2332 | flog_warn( | |
2333 | EC_ZEBRA_BAD_NHG_MESSAGE, | |
2334 | "Nexthop group without an ID received from the kernel"); | |
2335 | return -1; | |
2336 | } | |
2337 | ||
2338 | /* We use the ID key'd nhg table for kernel updates */ | |
2339 | id = *((uint32_t *)RTA_DATA(tb[NHA_ID])); | |
d9f5b2f5 | 2340 | |
e8b0e420 SW |
2341 | family = nhm->nh_family; |
2342 | ||
2343 | afi = family2afi(family); | |
2344 | ||
fdee485a SW |
2345 | if (IS_ZEBRA_DEBUG_KERNEL) |
2346 | zlog_debug("%s ID (%u) %s NS %u", | |
2347 | nl_msg_type_to_str(h->nlmsg_type), id, | |
2348 | nl_family_to_str(family), ns_id); | |
2349 | ||
2350 | ||
d9f5b2f5 SW |
2351 | nhe = zebra_nhg_lookup_id(id); |
2352 | ||
2353 | if (h->nlmsg_type == RTM_NEWNEXTHOP) { | |
8e401b25 SW |
2354 | nhg = nexthop_group_new(); |
2355 | ||
d9f5b2f5 SW |
2356 | if (tb[NHA_GROUP]) { |
2357 | /** | |
2358 | * If this is a group message its only going to have | |
2359 | * an array of nexthop IDs associated with it | |
2360 | */ | |
8e401b25 | 2361 | dep_count = netlink_nexthop_process_group(tb, nhg, |
85f5e761 SW |
2362 | &nhg_depends); |
2363 | } else { | |
2364 | if (tb[NHA_BLACKHOLE]) { | |
2365 | /** | |
2366 | * This nexthop is just for blackhole-ing | |
2367 | * traffic, it should not have an OIF, GATEWAY, | |
2368 | * or ENCAP | |
2369 | */ | |
8e401b25 SW |
2370 | nh = nexthop_new(); |
2371 | nh->type = NEXTHOP_TYPE_BLACKHOLE; | |
2372 | nh->bh_type = BLACKHOLE_UNSPEC; | |
85f5e761 SW |
2373 | } else if (tb[NHA_OIF]) { |
2374 | /** | |
2375 | * This is a true new nexthop, so we need | |
2376 | * to parse the gateway and device info | |
2377 | */ | |
2378 | nh = netlink_nexthop_process_nh(tb, family, | |
2379 | &ifp, ns_id); | |
2380 | } | |
8e401b25 SW |
2381 | if (nh) { |
2382 | SET_FLAG(nh->flags, NEXTHOP_FLAG_ACTIVE); | |
2383 | if (nhm->nh_flags & RTNH_F_ONLINK) | |
2384 | SET_FLAG(nh->flags, | |
2385 | NEXTHOP_FLAG_ONLINK); | |
55eeb2ae | 2386 | vrf_id = nh->vrf_id; |
8e401b25 SW |
2387 | nexthop_group_add_sorted(nhg, nh); |
2388 | } else { | |
2389 | flog_warn( | |
2390 | EC_ZEBRA_BAD_NHG_MESSAGE, | |
2391 | "Invalid Nexthop message received from the kernel with ID (%u)", | |
2392 | id); | |
2393 | return -1; | |
2394 | } | |
d9f5b2f5 SW |
2395 | } |
2396 | ||
8e401b25 SW |
2397 | if (!nhg->nexthop) { |
2398 | /* Nothing to lookup */ | |
2399 | zebra_nhg_free_group_depends(nhg, nhg_depends); | |
a3267f8b | 2400 | return -1; |
8e401b25 | 2401 | } |
d9f5b2f5 SW |
2402 | |
2403 | if (nhe) { | |
85f5e761 SW |
2404 | /* This is a change to a group we already have |
2405 | */ | |
8e401b25 | 2406 | |
565ce0d3 | 2407 | // TODO: Fix this for routes referencing it |
8e401b25 SW |
2408 | /* Free what's already there */ |
2409 | zebra_nhg_free_members(nhe); | |
2410 | ||
2411 | /* Update with new info */ | |
2412 | nhe->nhg = nhg; | |
2413 | if (dep_count) | |
85f5e761 | 2414 | nhe->nhg_depends = nhg_depends; |
8e401b25 | 2415 | |
d9f5b2f5 SW |
2416 | } else { |
2417 | /* This is a new nexthop group */ | |
55eeb2ae | 2418 | nhe = zebra_nhg_find(nhg, vrf_id, afi, id, nhg_depends, |
20822f9d | 2419 | true); |
2d6cd1f0 SW |
2420 | zebra_nhg_free_group_depends(nhg, nhg_depends); |
2421 | ||
8e401b25 SW |
2422 | if (!nhe) { |
2423 | flog_err( | |
2424 | EC_ZEBRA_TABLE_LOOKUP_FAILED, | |
2425 | "Zebra failed to find or create a nexthop hash entry for ID (%u) from the kernel", | |
2426 | id); | |
d9f5b2f5 SW |
2427 | return -1; |
2428 | } | |
8e401b25 SW |
2429 | |
2430 | nhe->is_kernel_nh = true; | |
2431 | if (id != nhe->id) { | |
2432 | /* Duplicate but with different ID from | |
2433 | * the kernel */ | |
2434 | ||
2435 | /* The kernel allows duplicate nexthops | |
2436 | * as long as they have different IDs. | |
2437 | * We are ignoring those to prevent | |
2438 | * syncing problems with the kernel | |
2439 | * changes. | |
2440 | */ | |
2441 | flog_warn( | |
2442 | EC_ZEBRA_DUPLICATE_NHG_MESSAGE, | |
2443 | "Nexthop Group from kernel with ID (%d) is a duplicate, ignoring", | |
2444 | id); | |
2445 | } | |
d9f5b2f5 | 2446 | } |
2614bf87 SW |
2447 | if (ifp) { |
2448 | /* Add the nhe to the interface's list | |
2449 | * of connected nhe's | |
2450 | */ | |
2451 | // TODO: Don't add dupes | |
2452 | nhe_connected_add(ifp, nhe); | |
2453 | } | |
044e54d1 | 2454 | SET_FLAG(nhe->flags, NEXTHOP_GROUP_INSTALLED); |
f44088c3 | 2455 | SET_FLAG(nhe->flags, NEXTHOP_GROUP_VALID); |
044e54d1 | 2456 | |
d9f5b2f5 SW |
2457 | } else if (h->nlmsg_type == RTM_DELNEXTHOP) { |
2458 | if (!nhe) { | |
2459 | flog_warn( | |
2460 | EC_ZEBRA_BAD_NHG_MESSAGE, | |
2461 | "Kernel delete message received for nexthop group ID (%u) that we do not have in our ID table", | |
2462 | id); | |
2463 | return -1; | |
2464 | } | |
2465 | ||
044e54d1 SW |
2466 | UNSET_FLAG(nhe->flags, NEXTHOP_GROUP_INSTALLED); |
2467 | ||
d9f5b2f5 | 2468 | // TODO: Run some active check on all route_entry's? |
75f8505d SW |
2469 | if (nhe->refcnt) { |
2470 | flog_err( | |
2471 | EC_ZEBRA_NHG_SYNC, | |
2472 | "Kernel deleted a nexthop group with ID (%u) that we are still using for a route, sending it back down", | |
2473 | nhe->id); | |
2474 | zebra_nhg_install_kernel(nhe); | |
2475 | } else { | |
2476 | zebra_nhg_release(nhe); | |
2477 | } | |
d9f5b2f5 SW |
2478 | } |
2479 | ||
2480 | ||
2481 | return 0; | |
2482 | } | |
2483 | ||
2484 | /** | |
2485 | * netlink_request_nexthop() - Request nextop information from the kernel | |
2486 | * @zns: Zebra namespace | |
2487 | * @family: AF_* netlink family | |
2488 | * @type: RTM_* route type | |
2489 | * | |
2490 | * Return: Result status | |
2491 | */ | |
2492 | static int netlink_request_nexthop(struct zebra_ns *zns, int family, int type) | |
2493 | { | |
2494 | struct { | |
2495 | struct nlmsghdr n; | |
2496 | struct nhmsg nhm; | |
2497 | } req; | |
2498 | ||
2499 | /* Form the request, specifying filter (rtattr) if needed. */ | |
2500 | memset(&req, 0, sizeof(req)); | |
2501 | req.n.nlmsg_type = type; | |
2502 | req.n.nlmsg_flags = NLM_F_ROOT | NLM_F_MATCH | NLM_F_REQUEST; | |
2503 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct nhmsg)); | |
2504 | req.nhm.nh_family = family; | |
2505 | ||
2506 | return netlink_request(&zns->netlink_cmd, &req.n); | |
2507 | } | |
2508 | ||
2509 | /** | |
2510 | * netlink_nexthop_read() - Nexthop read function using netlink interface | |
2511 | * | |
2512 | * @zns: Zebra name space | |
2513 | * | |
2514 | * Return: Result status | |
2515 | * Only called at bootstrap time. | |
2516 | */ | |
2517 | int netlink_nexthop_read(struct zebra_ns *zns) | |
2518 | { | |
2519 | int ret; | |
2520 | struct zebra_dplane_info dp_info; | |
2521 | ||
2522 | zebra_dplane_info_from_zns(&dp_info, zns, true /*is_cmd*/); | |
2523 | ||
2524 | /* Get nexthop objects */ | |
2525 | ret = netlink_request_nexthop(zns, AF_UNSPEC, RTM_GETNEXTHOP); | |
2526 | if (ret < 0) | |
2527 | return ret; | |
2528 | ret = netlink_parse_info(netlink_nexthop_change, &zns->netlink_cmd, | |
2529 | &dp_info, 0, 1); | |
60e0eaee | 2530 | return ret; |
d9f5b2f5 SW |
2531 | } |
2532 | ||
2533 | ||
d62a17ae | 2534 | int kernel_neigh_update(int add, int ifindex, uint32_t addr, char *lla, |
5895d33f | 2535 | int llalen, ns_id_t ns_id) |
6b8a5694 | 2536 | { |
d62a17ae | 2537 | return netlink_neigh_update(add ? RTM_NEWNEIGH : RTM_DELNEIGH, ifindex, |
5895d33f | 2538 | addr, lla, llalen, ns_id); |
6b8a5694 | 2539 | } |
718e3744 | 2540 | |
13d60d35 | 2541 | /* |
2542 | * Add remote VTEP to the flood list for this VxLAN interface (VNI). This | |
2543 | * is done by adding an FDB entry with a MAC of 00:00:00:00:00:00. | |
2544 | */ | |
0bbd4ff4 MS |
2545 | static int netlink_vxlan_flood_update_ctx(const struct zebra_dplane_ctx *ctx, |
2546 | int cmd) | |
13d60d35 | 2547 | { |
f3dbec60 | 2548 | uint8_t protocol = RTPROT_ZEBRA; |
d62a17ae | 2549 | struct { |
2550 | struct nlmsghdr n; | |
2551 | struct ndmsg ndm; | |
2552 | char buf[256]; | |
2553 | } req; | |
d7c0a89a | 2554 | uint8_t dst_mac[6] = {0x0, 0x0, 0x0, 0x0, 0x0, 0x0}; |
0bbd4ff4 | 2555 | const struct ipaddr *addr; |
d62a17ae | 2556 | |
5605ecfc | 2557 | memset(&req, 0, sizeof(req)); |
d62a17ae | 2558 | |
2559 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)); | |
2560 | req.n.nlmsg_flags = NLM_F_REQUEST; | |
2561 | if (cmd == RTM_NEWNEIGH) | |
2562 | req.n.nlmsg_flags |= (NLM_F_CREATE | NLM_F_APPEND); | |
2563 | req.n.nlmsg_type = cmd; | |
2564 | req.ndm.ndm_family = PF_BRIDGE; | |
2565 | req.ndm.ndm_state = NUD_NOARP | NUD_PERMANENT; | |
2566 | req.ndm.ndm_flags |= NTF_SELF; // Handle by "self", not "master" | |
2567 | ||
2568 | ||
f3dbec60 DS |
2569 | addattr_l(&req.n, sizeof(req), |
2570 | NDA_PROTOCOL, &protocol, sizeof(protocol)); | |
d62a17ae | 2571 | addattr_l(&req.n, sizeof(req), NDA_LLADDR, &dst_mac, 6); |
0bbd4ff4 | 2572 | req.ndm.ndm_ifindex = dplane_ctx_get_ifindex(ctx); |
13d60d35 | 2573 | |
0bbd4ff4 | 2574 | addr = dplane_ctx_neigh_get_ipaddr(ctx); |
13d60d35 | 2575 | |
0bbd4ff4 | 2576 | addattr_l(&req.n, sizeof(req), NDA_DST, &(addr->ipaddr_v4), 4); |
13d60d35 | 2577 | |
0bbd4ff4 MS |
2578 | return netlink_talk_info(netlink_talk_filter, &req.n, |
2579 | dplane_ctx_get_ns(ctx), 0); | |
13d60d35 | 2580 | } |
2581 | ||
2232a77c | 2582 | #ifndef NDA_RTA |
d62a17ae | 2583 | #define NDA_RTA(r) \ |
2584 | ((struct rtattr *)(((char *)(r)) + NLMSG_ALIGN(sizeof(struct ndmsg)))) | |
2232a77c | 2585 | #endif |
2586 | ||
2414abd3 | 2587 | static int netlink_macfdb_change(struct nlmsghdr *h, int len, ns_id_t ns_id) |
2232a77c | 2588 | { |
d62a17ae | 2589 | struct ndmsg *ndm; |
2590 | struct interface *ifp; | |
2591 | struct zebra_if *zif; | |
d62a17ae | 2592 | struct rtattr *tb[NDA_MAX + 1]; |
2593 | struct interface *br_if; | |
2594 | struct ethaddr mac; | |
2595 | vlanid_t vid = 0; | |
2596 | struct prefix vtep_ip; | |
2597 | int vid_present = 0, dst_present = 0; | |
2598 | char buf[ETHER_ADDR_STRLEN]; | |
2599 | char vid_buf[20]; | |
2600 | char dst_buf[30]; | |
a37f4598 | 2601 | bool sticky; |
d62a17ae | 2602 | |
2603 | ndm = NLMSG_DATA(h); | |
2604 | ||
2853fed6 | 2605 | /* We only process macfdb notifications if EVPN is enabled */ |
2606 | if (!is_evpn_enabled()) | |
2607 | return 0; | |
2608 | ||
d62a17ae | 2609 | /* The interface should exist. */ |
5895d33f | 2610 | ifp = if_lookup_by_index_per_ns(zebra_ns_lookup(ns_id), |
d62a17ae | 2611 | ndm->ndm_ifindex); |
28bd0652 DS |
2612 | if (!ifp || !ifp->info) { |
2613 | if (IS_ZEBRA_DEBUG_KERNEL) | |
2614 | zlog_debug("\t%s without associated interface: %u", | |
2615 | __PRETTY_FUNCTION__, ndm->ndm_ifindex); | |
d62a17ae | 2616 | return 0; |
28bd0652 | 2617 | } |
d62a17ae | 2618 | |
2619 | /* The interface should be something we're interested in. */ | |
28bd0652 DS |
2620 | if (!IS_ZEBRA_IF_BRIDGE_SLAVE(ifp)) { |
2621 | if (IS_ZEBRA_DEBUG_KERNEL) | |
2622 | zlog_debug("\t%s Not interested in %s, not a slave", | |
2623 | __PRETTY_FUNCTION__, ifp->name); | |
d62a17ae | 2624 | return 0; |
28bd0652 | 2625 | } |
d62a17ae | 2626 | |
2627 | /* Drop "permanent" entries. */ | |
28bd0652 DS |
2628 | if (ndm->ndm_state & NUD_PERMANENT) { |
2629 | if (IS_ZEBRA_DEBUG_KERNEL) | |
2630 | zlog_debug("\t%s Entry is PERMANENT, dropping", | |
2631 | __PRETTY_FUNCTION__); | |
d62a17ae | 2632 | return 0; |
28bd0652 | 2633 | } |
d62a17ae | 2634 | |
2635 | zif = (struct zebra_if *)ifp->info; | |
2636 | if ((br_if = zif->brslave_info.br_if) == NULL) { | |
28bd0652 DS |
2637 | if (IS_ZEBRA_DEBUG_KERNEL) |
2638 | zlog_debug( | |
2639 | "%s family %s IF %s(%u) brIF %u - no bridge master", | |
2640 | nl_msg_type_to_str(h->nlmsg_type), | |
2641 | nl_family_to_str(ndm->ndm_family), ifp->name, | |
2642 | ndm->ndm_ifindex, | |
2643 | zif->brslave_info.bridge_ifindex); | |
d62a17ae | 2644 | return 0; |
2645 | } | |
2646 | ||
2647 | /* Parse attributes and extract fields of interest. */ | |
2648 | memset(tb, 0, sizeof tb); | |
2649 | netlink_parse_rtattr(tb, NDA_MAX, NDA_RTA(ndm), len); | |
2650 | ||
2651 | if (!tb[NDA_LLADDR]) { | |
28bd0652 DS |
2652 | if (IS_ZEBRA_DEBUG_KERNEL) |
2653 | zlog_debug("%s family %s IF %s(%u) brIF %u - no LLADDR", | |
2654 | nl_msg_type_to_str(h->nlmsg_type), | |
2655 | nl_family_to_str(ndm->ndm_family), ifp->name, | |
2656 | ndm->ndm_ifindex, | |
2657 | zif->brslave_info.bridge_ifindex); | |
d62a17ae | 2658 | return 0; |
2659 | } | |
2660 | ||
ff8b7eb8 | 2661 | if (RTA_PAYLOAD(tb[NDA_LLADDR]) != ETH_ALEN) { |
28bd0652 DS |
2662 | if (IS_ZEBRA_DEBUG_KERNEL) |
2663 | zlog_debug( | |
2664 | "%s family %s IF %s(%u) brIF %u - LLADDR is not MAC, len %lu", | |
2665 | nl_msg_type_to_str(h->nlmsg_type), | |
2666 | nl_family_to_str(ndm->ndm_family), ifp->name, | |
2667 | ndm->ndm_ifindex, | |
2668 | zif->brslave_info.bridge_ifindex, | |
2669 | (unsigned long)RTA_PAYLOAD(tb[NDA_LLADDR])); | |
d62a17ae | 2670 | return 0; |
2671 | } | |
2672 | ||
ff8b7eb8 | 2673 | memcpy(&mac, RTA_DATA(tb[NDA_LLADDR]), ETH_ALEN); |
d62a17ae | 2674 | |
2675 | if ((NDA_VLAN <= NDA_MAX) && tb[NDA_VLAN]) { | |
2676 | vid_present = 1; | |
d7c0a89a | 2677 | vid = *(uint16_t *)RTA_DATA(tb[NDA_VLAN]); |
d62a17ae | 2678 | sprintf(vid_buf, " VLAN %u", vid); |
2679 | } | |
2680 | ||
2681 | if (tb[NDA_DST]) { | |
2682 | /* TODO: Only IPv4 supported now. */ | |
2683 | dst_present = 1; | |
2684 | vtep_ip.family = AF_INET; | |
2685 | vtep_ip.prefixlen = IPV4_MAX_BITLEN; | |
2686 | memcpy(&(vtep_ip.u.prefix4.s_addr), RTA_DATA(tb[NDA_DST]), | |
2687 | IPV4_MAX_BYTELEN); | |
2688 | sprintf(dst_buf, " dst %s", inet_ntoa(vtep_ip.u.prefix4)); | |
2689 | } | |
2690 | ||
a37f4598 | 2691 | sticky = !!(ndm->ndm_state & NUD_NOARP); |
d62a17ae | 2692 | |
2693 | if (IS_ZEBRA_DEBUG_KERNEL) | |
2694 | zlog_debug("Rx %s family %s IF %s(%u)%s %sMAC %s%s", | |
2695 | nl_msg_type_to_str(h->nlmsg_type), | |
2696 | nl_family_to_str(ndm->ndm_family), ifp->name, | |
2697 | ndm->ndm_ifindex, vid_present ? vid_buf : "", | |
2698 | sticky ? "sticky " : "", | |
2699 | prefix_mac2str(&mac, buf, sizeof(buf)), | |
2700 | dst_present ? dst_buf : ""); | |
2701 | ||
28bd0652 DS |
2702 | if (filter_vlan && vid != filter_vlan) { |
2703 | if (IS_ZEBRA_DEBUG_KERNEL) | |
2704 | zlog_debug("\tFiltered due to filter vlan: %d", | |
2705 | filter_vlan); | |
d62a17ae | 2706 | return 0; |
28bd0652 | 2707 | } |
d62a17ae | 2708 | |
2709 | /* If add or update, do accordingly if learnt on a "local" interface; if | |
2710 | * the notification is over VxLAN, this has to be related to | |
2711 | * multi-homing, | |
2712 | * so perform an implicit delete of any local entry (if it exists). | |
2713 | */ | |
2714 | if (h->nlmsg_type == RTM_NEWNEIGH) { | |
d62a17ae | 2715 | if (IS_ZEBRA_IF_VXLAN(ifp)) |
2716 | return zebra_vxlan_check_del_local_mac(ifp, br_if, &mac, | |
2717 | vid); | |
2718 | ||
2719 | return zebra_vxlan_local_mac_add_update(ifp, br_if, &mac, vid, | |
2720 | sticky); | |
2721 | } | |
2722 | ||
2723 | /* This is a delete notification. | |
2724 | * 1. For a MAC over VxLan, check if it needs to be refreshed(readded) | |
2725 | * 2. For a MAC over "local" interface, delete the mac | |
2726 | * Note: We will get notifications from both bridge driver and VxLAN | |
2727 | * driver. | |
2728 | * Ignore the notification from VxLan driver as it is also generated | |
2729 | * when mac moves from remote to local. | |
2730 | */ | |
28bd0652 DS |
2731 | if (dst_present) { |
2732 | if (IS_ZEBRA_DEBUG_KERNEL) | |
2733 | zlog_debug("\tNo Destination Present"); | |
d62a17ae | 2734 | return 0; |
28bd0652 | 2735 | } |
d62a17ae | 2736 | |
2737 | if (IS_ZEBRA_IF_VXLAN(ifp)) | |
2738 | return zebra_vxlan_check_readd_remote_mac(ifp, br_if, &mac, | |
2739 | vid); | |
2740 | ||
2741 | return zebra_vxlan_local_mac_del(ifp, br_if, &mac, vid); | |
2232a77c | 2742 | } |
2743 | ||
2414abd3 | 2744 | static int netlink_macfdb_table(struct nlmsghdr *h, ns_id_t ns_id, int startup) |
2232a77c | 2745 | { |
d62a17ae | 2746 | int len; |
2747 | struct ndmsg *ndm; | |
2232a77c | 2748 | |
d62a17ae | 2749 | if (h->nlmsg_type != RTM_NEWNEIGH) |
2750 | return 0; | |
2232a77c | 2751 | |
d62a17ae | 2752 | /* Length validity. */ |
2753 | len = h->nlmsg_len - NLMSG_LENGTH(sizeof(struct ndmsg)); | |
2754 | if (len < 0) | |
2755 | return -1; | |
2232a77c | 2756 | |
d62a17ae | 2757 | /* We are interested only in AF_BRIDGE notifications. */ |
2758 | ndm = NLMSG_DATA(h); | |
2759 | if (ndm->ndm_family != AF_BRIDGE) | |
2760 | return 0; | |
2232a77c | 2761 | |
2414abd3 | 2762 | return netlink_macfdb_change(h, len, ns_id); |
2232a77c | 2763 | } |
2764 | ||
2765 | /* Request for MAC FDB information from the kernel */ | |
85a75f1e MS |
2766 | static int netlink_request_macs(struct nlsock *netlink_cmd, int family, |
2767 | int type, ifindex_t master_ifindex) | |
2232a77c | 2768 | { |
d62a17ae | 2769 | struct { |
2770 | struct nlmsghdr n; | |
2771 | struct ifinfomsg ifm; | |
2772 | char buf[256]; | |
2773 | } req; | |
2774 | ||
2775 | /* Form the request, specifying filter (rtattr) if needed. */ | |
2776 | memset(&req, 0, sizeof(req)); | |
2777 | req.n.nlmsg_type = type; | |
718f9b0f | 2778 | req.n.nlmsg_flags = NLM_F_ROOT | NLM_F_MATCH | NLM_F_REQUEST; |
d62a17ae | 2779 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg)); |
2780 | req.ifm.ifi_family = family; | |
2781 | if (master_ifindex) | |
2782 | addattr32(&req.n, sizeof(req), IFLA_MASTER, master_ifindex); | |
2783 | ||
85a75f1e | 2784 | return netlink_request(netlink_cmd, &req.n); |
2232a77c | 2785 | } |
2786 | ||
2787 | /* | |
2788 | * MAC forwarding database read using netlink interface. This is invoked | |
2789 | * at startup. | |
2790 | */ | |
d62a17ae | 2791 | int netlink_macfdb_read(struct zebra_ns *zns) |
2232a77c | 2792 | { |
d62a17ae | 2793 | int ret; |
85a75f1e MS |
2794 | struct zebra_dplane_info dp_info; |
2795 | ||
2796 | zebra_dplane_info_from_zns(&dp_info, zns, true /*is_cmd*/); | |
d62a17ae | 2797 | |
2798 | /* Get bridge FDB table. */ | |
85a75f1e MS |
2799 | ret = netlink_request_macs(&zns->netlink_cmd, AF_BRIDGE, RTM_GETNEIGH, |
2800 | 0); | |
d62a17ae | 2801 | if (ret < 0) |
2802 | return ret; | |
2803 | /* We are reading entire table. */ | |
2804 | filter_vlan = 0; | |
85a75f1e MS |
2805 | ret = netlink_parse_info(netlink_macfdb_table, &zns->netlink_cmd, |
2806 | &dp_info, 0, 1); | |
d62a17ae | 2807 | |
2808 | return ret; | |
2232a77c | 2809 | } |
2810 | ||
2811 | /* | |
2812 | * MAC forwarding database read using netlink interface. This is for a | |
2813 | * specific bridge and matching specific access VLAN (if VLAN-aware bridge). | |
2814 | */ | |
d62a17ae | 2815 | int netlink_macfdb_read_for_bridge(struct zebra_ns *zns, struct interface *ifp, |
2816 | struct interface *br_if) | |
2232a77c | 2817 | { |
d62a17ae | 2818 | struct zebra_if *br_zif; |
2819 | struct zebra_if *zif; | |
2820 | struct zebra_l2info_vxlan *vxl; | |
85a75f1e | 2821 | struct zebra_dplane_info dp_info; |
d62a17ae | 2822 | int ret = 0; |
2823 | ||
85a75f1e | 2824 | zebra_dplane_info_from_zns(&dp_info, zns, true /*is_cmd*/); |
d62a17ae | 2825 | |
2826 | /* Save VLAN we're filtering on, if needed. */ | |
2827 | br_zif = (struct zebra_if *)br_if->info; | |
2828 | zif = (struct zebra_if *)ifp->info; | |
2829 | vxl = &zif->l2info.vxl; | |
2830 | if (IS_ZEBRA_IF_BRIDGE_VLAN_AWARE(br_zif)) | |
2831 | filter_vlan = vxl->access_vlan; | |
2832 | ||
2833 | /* Get bridge FDB table for specific bridge - we do the VLAN filtering. | |
2834 | */ | |
85a75f1e | 2835 | ret = netlink_request_macs(&zns->netlink_cmd, AF_BRIDGE, RTM_GETNEIGH, |
d62a17ae | 2836 | br_if->ifindex); |
2837 | if (ret < 0) | |
2838 | return ret; | |
85a75f1e MS |
2839 | ret = netlink_parse_info(netlink_macfdb_table, &zns->netlink_cmd, |
2840 | &dp_info, 0, 0); | |
d62a17ae | 2841 | |
2842 | /* Reset VLAN filter. */ | |
2843 | filter_vlan = 0; | |
2844 | return ret; | |
2232a77c | 2845 | } |
2846 | ||
67fb9374 CS |
2847 | |
2848 | /* Request for MAC FDB for a specific MAC address in VLAN from the kernel */ | |
2849 | static int netlink_request_specific_mac_in_bridge(struct zebra_ns *zns, | |
2850 | int family, | |
2851 | int type, | |
2852 | struct interface *br_if, | |
2853 | struct ethaddr *mac, | |
2854 | vlanid_t vid) | |
2855 | { | |
2856 | struct { | |
2857 | struct nlmsghdr n; | |
2858 | struct ndmsg ndm; | |
2859 | char buf[256]; | |
2860 | } req; | |
2861 | struct zebra_if *br_zif; | |
2862 | char buf[ETHER_ADDR_STRLEN]; | |
2863 | ||
2864 | memset(&req, 0, sizeof(req)); | |
2865 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)); | |
2866 | req.n.nlmsg_type = type; /* RTM_GETNEIGH */ | |
2867 | req.n.nlmsg_flags = NLM_F_REQUEST; | |
2868 | req.ndm.ndm_family = family; /* AF_BRIDGE */ | |
2869 | /* req.ndm.ndm_state = NUD_REACHABLE; */ | |
2870 | ||
2871 | addattr_l(&req.n, sizeof(req), NDA_LLADDR, mac, 6); | |
2872 | ||
2873 | br_zif = (struct zebra_if *)br_if->info; | |
2874 | if (IS_ZEBRA_IF_BRIDGE_VLAN_AWARE(br_zif) && vid > 0) | |
2875 | addattr16(&req.n, sizeof(req), NDA_VLAN, vid); | |
2876 | ||
2877 | addattr32(&req.n, sizeof(req), NDA_MASTER, br_if->ifindex); | |
2878 | ||
2879 | if (IS_ZEBRA_DEBUG_KERNEL) | |
2880 | zlog_debug("%s: Tx family %s IF %s(%u) MAC %s vid %u", | |
2881 | __PRETTY_FUNCTION__, | |
2882 | nl_family_to_str(req.ndm.ndm_family), br_if->name, | |
2883 | br_if->ifindex, | |
2884 | prefix_mac2str(mac, buf, sizeof(buf)), vid); | |
2885 | ||
2886 | return netlink_request(&zns->netlink_cmd, &req.n); | |
2887 | } | |
2888 | ||
2889 | int netlink_macfdb_read_specific_mac(struct zebra_ns *zns, | |
2890 | struct interface *br_if, | |
2891 | struct ethaddr *mac, vlanid_t vid) | |
2892 | { | |
2893 | int ret = 0; | |
2894 | struct zebra_dplane_info dp_info; | |
2895 | ||
2896 | zebra_dplane_info_from_zns(&dp_info, zns, true /*is_cmd*/); | |
2897 | ||
2898 | /* Get bridge FDB table for specific bridge - we do the VLAN filtering. | |
2899 | */ | |
2900 | ret = netlink_request_specific_mac_in_bridge(zns, AF_BRIDGE, | |
2901 | RTM_GETNEIGH, | |
2902 | br_if, mac, vid); | |
2903 | if (ret < 0) | |
2904 | return ret; | |
2905 | ||
2906 | ret = netlink_parse_info(netlink_macfdb_table, &zns->netlink_cmd, | |
2907 | &dp_info, 1, 0); | |
2908 | ||
2909 | return ret; | |
2910 | } | |
036d93c0 MS |
2911 | |
2912 | /* | |
2913 | * Netlink-specific handler for MAC updates using dataplane context object. | |
2914 | */ | |
2915 | static enum zebra_dplane_result | |
2916 | netlink_macfdb_update_ctx(struct zebra_dplane_ctx *ctx) | |
2232a77c | 2917 | { |
f3dbec60 | 2918 | uint8_t protocol = RTPROT_ZEBRA; |
d62a17ae | 2919 | struct { |
2920 | struct nlmsghdr n; | |
2921 | struct ndmsg ndm; | |
2922 | char buf[256]; | |
2923 | } req; | |
036d93c0 | 2924 | int ret; |
d62a17ae | 2925 | int dst_alen; |
36590076 | 2926 | int vid_present = 0; |
036d93c0 MS |
2927 | int cmd; |
2928 | struct in_addr vtep_ip; | |
2929 | vlanid_t vid; | |
2930 | ||
2931 | if (dplane_ctx_get_op(ctx) == DPLANE_OP_MAC_INSTALL) | |
2932 | cmd = RTM_NEWNEIGH; | |
2933 | else | |
2934 | cmd = RTM_DELNEIGH; | |
2935 | ||
5605ecfc | 2936 | memset(&req, 0, sizeof(req)); |
d62a17ae | 2937 | |
2938 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)); | |
2939 | req.n.nlmsg_flags = NLM_F_REQUEST; | |
2940 | if (cmd == RTM_NEWNEIGH) | |
2941 | req.n.nlmsg_flags |= (NLM_F_CREATE | NLM_F_REPLACE); | |
2942 | req.n.nlmsg_type = cmd; | |
2943 | req.ndm.ndm_family = AF_BRIDGE; | |
2944 | req.ndm.ndm_flags |= NTF_SELF | NTF_MASTER; | |
2945 | req.ndm.ndm_state = NUD_REACHABLE; | |
2946 | ||
036d93c0 | 2947 | if (dplane_ctx_mac_is_sticky(ctx)) |
d62a17ae | 2948 | req.ndm.ndm_state |= NUD_NOARP; |
2949 | else | |
2950 | req.ndm.ndm_flags |= NTF_EXT_LEARNED; | |
2951 | ||
f3dbec60 DS |
2952 | addattr_l(&req.n, sizeof(req), |
2953 | NDA_PROTOCOL, &protocol, sizeof(protocol)); | |
036d93c0 MS |
2954 | addattr_l(&req.n, sizeof(req), NDA_LLADDR, |
2955 | dplane_ctx_mac_get_addr(ctx), 6); | |
478566d6 | 2956 | req.ndm.ndm_ifindex = dplane_ctx_get_ifindex(ctx); |
036d93c0 | 2957 | |
d63c1b18 | 2958 | dst_alen = 4; // TODO: hardcoded |
036d93c0 | 2959 | vtep_ip = *(dplane_ctx_mac_get_vtep_ip(ctx)); |
d63c1b18 | 2960 | addattr_l(&req.n, sizeof(req), NDA_DST, &vtep_ip, dst_alen); |
036d93c0 | 2961 | |
478566d6 MS |
2962 | vid = dplane_ctx_mac_get_vlan(ctx); |
2963 | ||
2964 | if (vid > 0) { | |
d62a17ae | 2965 | addattr16(&req.n, sizeof(req), NDA_VLAN, vid); |
2966 | vid_present = 1; | |
d62a17ae | 2967 | } |
478566d6 MS |
2968 | addattr32(&req.n, sizeof(req), NDA_MASTER, |
2969 | dplane_ctx_mac_get_br_ifindex(ctx)); | |
d62a17ae | 2970 | |
036d93c0 MS |
2971 | if (IS_ZEBRA_DEBUG_KERNEL) { |
2972 | char ipbuf[PREFIX_STRLEN]; | |
2973 | char buf[ETHER_ADDR_STRLEN]; | |
2974 | char dst_buf[PREFIX_STRLEN + 10]; | |
478566d6 MS |
2975 | char vid_buf[20]; |
2976 | ||
2977 | if (vid_present) | |
2978 | snprintf(vid_buf, sizeof(vid_buf), " VLAN %u", vid); | |
2979 | else | |
2980 | vid_buf[0] = '\0'; | |
036d93c0 MS |
2981 | |
2982 | inet_ntop(AF_INET, &vtep_ip, ipbuf, sizeof(ipbuf)); | |
2983 | snprintf(dst_buf, sizeof(dst_buf), " dst %s", ipbuf); | |
2984 | prefix_mac2str(dplane_ctx_mac_get_addr(ctx), buf, sizeof(buf)); | |
2985 | ||
d62a17ae | 2986 | zlog_debug("Tx %s family %s IF %s(%u)%s %sMAC %s%s", |
2987 | nl_msg_type_to_str(cmd), | |
478566d6 MS |
2988 | nl_family_to_str(req.ndm.ndm_family), |
2989 | dplane_ctx_get_ifname(ctx), | |
2990 | dplane_ctx_get_ifindex(ctx), vid_buf, | |
036d93c0 MS |
2991 | dplane_ctx_mac_is_sticky(ctx) ? "sticky " : "", |
2992 | buf, dst_buf); | |
2993 | } | |
d62a17ae | 2994 | |
036d93c0 MS |
2995 | ret = netlink_talk_info(netlink_talk_filter, &req.n, |
2996 | dplane_ctx_get_ns(ctx), 0); | |
2997 | if (ret == 0) | |
2998 | return ZEBRA_DPLANE_REQUEST_SUCCESS; | |
2999 | else | |
3000 | return ZEBRA_DPLANE_REQUEST_FAILURE; | |
2232a77c | 3001 | } |
3002 | ||
f17b99ed DS |
3003 | /* |
3004 | * In the event the kernel deletes ipv4 link-local neighbor entries created for | |
3005 | * 5549 support, re-install them. | |
3006 | */ | |
3007 | static void netlink_handle_5549(struct ndmsg *ndm, struct zebra_if *zif, | |
9b036974 DS |
3008 | struct interface *ifp, struct ipaddr *ip, |
3009 | bool handle_failed) | |
f17b99ed DS |
3010 | { |
3011 | if (ndm->ndm_family != AF_INET) | |
3012 | return; | |
3013 | ||
3014 | if (!zif->v6_2_v4_ll_neigh_entry) | |
3015 | return; | |
3016 | ||
3017 | if (ipv4_ll.s_addr != ip->ip._v4_addr.s_addr) | |
3018 | return; | |
3019 | ||
9b036974 DS |
3020 | if (handle_failed && ndm->ndm_state & NUD_FAILED) { |
3021 | zlog_info("Neighbor Entry for %s has entered a failed state, not reinstalling", | |
3022 | ifp->name); | |
3023 | return; | |
3024 | } | |
3025 | ||
f17b99ed DS |
3026 | if_nbr_ipv6ll_to_ipv4ll_neigh_update(ifp, &zif->v6_2_v4_ll_addr6, true); |
3027 | } | |
3028 | ||
d62a17ae | 3029 | #define NUD_VALID \ |
3030 | (NUD_PERMANENT | NUD_NOARP | NUD_REACHABLE | NUD_PROBE | NUD_STALE \ | |
3031 | | NUD_DELAY) | |
2232a77c | 3032 | |
2414abd3 | 3033 | static int netlink_ipneigh_change(struct nlmsghdr *h, int len, ns_id_t ns_id) |
2232a77c | 3034 | { |
d62a17ae | 3035 | struct ndmsg *ndm; |
3036 | struct interface *ifp; | |
3037 | struct zebra_if *zif; | |
d62a17ae | 3038 | struct rtattr *tb[NDA_MAX + 1]; |
3039 | struct interface *link_if; | |
3040 | struct ethaddr mac; | |
3041 | struct ipaddr ip; | |
3042 | char buf[ETHER_ADDR_STRLEN]; | |
3043 | char buf2[INET6_ADDRSTRLEN]; | |
3044 | int mac_present = 0; | |
a37f4598 | 3045 | bool is_ext; |
3046 | bool is_router; | |
d62a17ae | 3047 | |
3048 | ndm = NLMSG_DATA(h); | |
3049 | ||
3050 | /* The interface should exist. */ | |
5895d33f | 3051 | ifp = if_lookup_by_index_per_ns(zebra_ns_lookup(ns_id), |
d62a17ae | 3052 | ndm->ndm_ifindex); |
2853fed6 | 3053 | if (!ifp || !ifp->info) |
d62a17ae | 3054 | return 0; |
3055 | ||
20089ae2 DS |
3056 | zif = (struct zebra_if *)ifp->info; |
3057 | ||
3058 | /* Parse attributes and extract fields of interest. */ | |
3059 | memset(tb, 0, sizeof tb); | |
3060 | netlink_parse_rtattr(tb, NDA_MAX, NDA_RTA(ndm), len); | |
3061 | ||
3062 | if (!tb[NDA_DST]) { | |
9df414fe QY |
3063 | zlog_debug("%s family %s IF %s(%u) - no DST", |
3064 | nl_msg_type_to_str(h->nlmsg_type), | |
3065 | nl_family_to_str(ndm->ndm_family), ifp->name, | |
3066 | ndm->ndm_ifindex); | |
d62a17ae | 3067 | return 0; |
20089ae2 DS |
3068 | } |
3069 | ||
3070 | memset(&ip, 0, sizeof(struct ipaddr)); | |
3071 | ip.ipa_type = (ndm->ndm_family == AF_INET) ? IPADDR_V4 : IPADDR_V6; | |
3072 | memcpy(&ip.ip.addr, RTA_DATA(tb[NDA_DST]), RTA_PAYLOAD(tb[NDA_DST])); | |
3073 | ||
f17b99ed DS |
3074 | /* if kernel deletes our rfc5549 neighbor entry, re-install it */ |
3075 | if (h->nlmsg_type == RTM_DELNEIGH && (ndm->ndm_state & NUD_PERMANENT)) { | |
9b036974 | 3076 | netlink_handle_5549(ndm, zif, ifp, &ip, false); |
28bd0652 DS |
3077 | if (IS_ZEBRA_DEBUG_KERNEL) |
3078 | zlog_debug( | |
3079 | "\tNeighbor Entry Received is a 5549 entry, finished"); | |
20089ae2 DS |
3080 | return 0; |
3081 | } | |
d62a17ae | 3082 | |
f17b99ed | 3083 | /* if kernel marks our rfc5549 neighbor entry invalid, re-install it */ |
9b036974 DS |
3084 | if (h->nlmsg_type == RTM_NEWNEIGH && !(ndm->ndm_state & NUD_VALID)) |
3085 | netlink_handle_5549(ndm, zif, ifp, &ip, true); | |
f17b99ed | 3086 | |
d62a17ae | 3087 | /* The neighbor is present on an SVI. From this, we locate the |
3088 | * underlying | |
3089 | * bridge because we're only interested in neighbors on a VxLAN bridge. | |
3090 | * The bridge is located based on the nature of the SVI: | |
3091 | * (a) In the case of a VLAN-aware bridge, the SVI is a L3 VLAN | |
3092 | * interface | |
3093 | * and is linked to the bridge | |
3094 | * (b) In the case of a VLAN-unaware bridge, the SVI is the bridge | |
3095 | * inteface | |
3096 | * itself | |
3097 | */ | |
3098 | if (IS_ZEBRA_IF_VLAN(ifp)) { | |
5895d33f | 3099 | link_if = if_lookup_by_index_per_ns(zebra_ns_lookup(ns_id), |
71349e03 | 3100 | zif->link_ifindex); |
d62a17ae | 3101 | if (!link_if) |
3102 | return 0; | |
3103 | } else if (IS_ZEBRA_IF_BRIDGE(ifp)) | |
3104 | link_if = ifp; | |
28bd0652 DS |
3105 | else { |
3106 | if (IS_ZEBRA_DEBUG_KERNEL) | |
3107 | zlog_debug( | |
3108 | "\tNeighbor Entry received is not on a VLAN or a BRIDGE, ignoring"); | |
d62a17ae | 3109 | return 0; |
28bd0652 | 3110 | } |
d62a17ae | 3111 | |
d62a17ae | 3112 | memset(&mac, 0, sizeof(struct ethaddr)); |
d62a17ae | 3113 | if (h->nlmsg_type == RTM_NEWNEIGH) { |
3114 | if (tb[NDA_LLADDR]) { | |
ff8b7eb8 | 3115 | if (RTA_PAYLOAD(tb[NDA_LLADDR]) != ETH_ALEN) { |
28bd0652 DS |
3116 | if (IS_ZEBRA_DEBUG_KERNEL) |
3117 | zlog_debug( | |
3118 | "%s family %s IF %s(%u) - LLADDR is not MAC, len %lu", | |
3119 | nl_msg_type_to_str( | |
3120 | h->nlmsg_type), | |
3121 | nl_family_to_str( | |
3122 | ndm->ndm_family), | |
3123 | ifp->name, ndm->ndm_ifindex, | |
3124 | (unsigned long)RTA_PAYLOAD( | |
3125 | tb[NDA_LLADDR])); | |
d62a17ae | 3126 | return 0; |
3127 | } | |
3128 | ||
3129 | mac_present = 1; | |
ff8b7eb8 | 3130 | memcpy(&mac, RTA_DATA(tb[NDA_LLADDR]), ETH_ALEN); |
d62a17ae | 3131 | } |
3132 | ||
a37f4598 | 3133 | is_ext = !!(ndm->ndm_flags & NTF_EXT_LEARNED); |
3134 | is_router = !!(ndm->ndm_flags & NTF_ROUTER); | |
d62a17ae | 3135 | |
3136 | if (IS_ZEBRA_DEBUG_KERNEL) | |
3137 | zlog_debug( | |
3138 | "Rx %s family %s IF %s(%u) IP %s MAC %s state 0x%x flags 0x%x", | |
3139 | nl_msg_type_to_str(h->nlmsg_type), | |
3140 | nl_family_to_str(ndm->ndm_family), ifp->name, | |
3141 | ndm->ndm_ifindex, | |
3142 | ipaddr2str(&ip, buf2, sizeof(buf2)), | |
3143 | mac_present | |
3144 | ? prefix_mac2str(&mac, buf, sizeof(buf)) | |
3145 | : "", | |
3146 | ndm->ndm_state, ndm->ndm_flags); | |
3147 | ||
3148 | /* If the neighbor state is valid for use, process as an add or | |
3149 | * update | |
3150 | * else process as a delete. Note that the delete handling may | |
3151 | * result | |
3152 | * in re-adding the neighbor if it is a valid "remote" neighbor. | |
3153 | */ | |
3154 | if (ndm->ndm_state & NUD_VALID) | |
ee69da27 | 3155 | return zebra_vxlan_handle_kernel_neigh_update( |
d62a17ae | 3156 | ifp, link_if, &ip, &mac, ndm->ndm_state, |
a37f4598 | 3157 | is_ext, is_router); |
d62a17ae | 3158 | |
ee69da27 | 3159 | return zebra_vxlan_handle_kernel_neigh_del(ifp, link_if, &ip); |
d62a17ae | 3160 | } |
3161 | ||
3162 | if (IS_ZEBRA_DEBUG_KERNEL) | |
3163 | zlog_debug("Rx %s family %s IF %s(%u) IP %s", | |
3164 | nl_msg_type_to_str(h->nlmsg_type), | |
3165 | nl_family_to_str(ndm->ndm_family), ifp->name, | |
3166 | ndm->ndm_ifindex, | |
3167 | ipaddr2str(&ip, buf2, sizeof(buf2))); | |
3168 | ||
3169 | /* Process the delete - it may result in re-adding the neighbor if it is | |
3170 | * a valid "remote" neighbor. | |
3171 | */ | |
ee69da27 | 3172 | return zebra_vxlan_handle_kernel_neigh_del(ifp, link_if, &ip); |
2232a77c | 3173 | } |
3174 | ||
2414abd3 | 3175 | static int netlink_neigh_table(struct nlmsghdr *h, ns_id_t ns_id, int startup) |
2232a77c | 3176 | { |
d62a17ae | 3177 | int len; |
3178 | struct ndmsg *ndm; | |
2232a77c | 3179 | |
d62a17ae | 3180 | if (h->nlmsg_type != RTM_NEWNEIGH) |
3181 | return 0; | |
2232a77c | 3182 | |
d62a17ae | 3183 | /* Length validity. */ |
3184 | len = h->nlmsg_len - NLMSG_LENGTH(sizeof(struct ndmsg)); | |
3185 | if (len < 0) | |
3186 | return -1; | |
2232a77c | 3187 | |
d62a17ae | 3188 | /* We are interested only in AF_INET or AF_INET6 notifications. */ |
3189 | ndm = NLMSG_DATA(h); | |
3190 | if (ndm->ndm_family != AF_INET && ndm->ndm_family != AF_INET6) | |
3191 | return 0; | |
2232a77c | 3192 | |
2414abd3 | 3193 | return netlink_neigh_change(h, len); |
2232a77c | 3194 | } |
3195 | ||
3196 | /* Request for IP neighbor information from the kernel */ | |
85a75f1e MS |
3197 | static int netlink_request_neigh(struct nlsock *netlink_cmd, int family, |
3198 | int type, ifindex_t ifindex) | |
2232a77c | 3199 | { |
d62a17ae | 3200 | struct { |
3201 | struct nlmsghdr n; | |
3202 | struct ndmsg ndm; | |
3203 | char buf[256]; | |
3204 | } req; | |
3205 | ||
3206 | /* Form the request, specifying filter (rtattr) if needed. */ | |
3207 | memset(&req, 0, sizeof(req)); | |
3208 | req.n.nlmsg_type = type; | |
718f9b0f | 3209 | req.n.nlmsg_flags = NLM_F_ROOT | NLM_F_MATCH | NLM_F_REQUEST; |
d62a17ae | 3210 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)); |
3211 | req.ndm.ndm_family = family; | |
3212 | if (ifindex) | |
3213 | addattr32(&req.n, sizeof(req), NDA_IFINDEX, ifindex); | |
3214 | ||
85a75f1e | 3215 | return netlink_request(netlink_cmd, &req.n); |
2232a77c | 3216 | } |
3217 | ||
3218 | /* | |
3219 | * IP Neighbor table read using netlink interface. This is invoked | |
3220 | * at startup. | |
3221 | */ | |
d62a17ae | 3222 | int netlink_neigh_read(struct zebra_ns *zns) |
2232a77c | 3223 | { |
d62a17ae | 3224 | int ret; |
85a75f1e MS |
3225 | struct zebra_dplane_info dp_info; |
3226 | ||
3227 | zebra_dplane_info_from_zns(&dp_info, zns, true /*is_cmd*/); | |
2232a77c | 3228 | |
d62a17ae | 3229 | /* Get IP neighbor table. */ |
85a75f1e MS |
3230 | ret = netlink_request_neigh(&zns->netlink_cmd, AF_UNSPEC, RTM_GETNEIGH, |
3231 | 0); | |
d62a17ae | 3232 | if (ret < 0) |
3233 | return ret; | |
85a75f1e MS |
3234 | ret = netlink_parse_info(netlink_neigh_table, &zns->netlink_cmd, |
3235 | &dp_info, 0, 1); | |
2232a77c | 3236 | |
d62a17ae | 3237 | return ret; |
2232a77c | 3238 | } |
3239 | ||
3240 | /* | |
3241 | * IP Neighbor table read using netlink interface. This is for a specific | |
3242 | * VLAN device. | |
3243 | */ | |
d62a17ae | 3244 | int netlink_neigh_read_for_vlan(struct zebra_ns *zns, struct interface *vlan_if) |
2232a77c | 3245 | { |
d62a17ae | 3246 | int ret = 0; |
85a75f1e MS |
3247 | struct zebra_dplane_info dp_info; |
3248 | ||
3249 | zebra_dplane_info_from_zns(&dp_info, zns, true /*is_cmd*/); | |
2232a77c | 3250 | |
85a75f1e | 3251 | ret = netlink_request_neigh(&zns->netlink_cmd, AF_UNSPEC, RTM_GETNEIGH, |
d62a17ae | 3252 | vlan_if->ifindex); |
3253 | if (ret < 0) | |
3254 | return ret; | |
85a75f1e MS |
3255 | ret = netlink_parse_info(netlink_neigh_table, &zns->netlink_cmd, |
3256 | &dp_info, 0, 0); | |
2232a77c | 3257 | |
d62a17ae | 3258 | return ret; |
2232a77c | 3259 | } |
3260 | ||
67fb9374 CS |
3261 | /* |
3262 | * Request for a specific IP in VLAN (SVI) device from IP Neighbor table, | |
3263 | * read using netlink interface. | |
3264 | */ | |
3265 | static int netlink_request_specific_neigh_in_vlan(struct zebra_ns *zns, | |
3266 | int type, struct ipaddr *ip, | |
3267 | ifindex_t ifindex) | |
3268 | { | |
3269 | struct { | |
3270 | struct nlmsghdr n; | |
3271 | struct ndmsg ndm; | |
3272 | char buf[256]; | |
3273 | } req; | |
3274 | int ipa_len; | |
3275 | ||
3276 | /* Form the request, specifying filter (rtattr) if needed. */ | |
3277 | memset(&req, 0, sizeof(req)); | |
3278 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)); | |
3279 | req.n.nlmsg_flags = NLM_F_REQUEST; | |
3280 | req.n.nlmsg_type = type; /* RTM_GETNEIGH */ | |
3281 | req.ndm.ndm_ifindex = ifindex; | |
3282 | ||
3283 | if (IS_IPADDR_V4(ip)) { | |
3284 | ipa_len = IPV4_MAX_BYTELEN; | |
3285 | req.ndm.ndm_family = AF_INET; | |
3286 | ||
3287 | } else { | |
3288 | ipa_len = IPV6_MAX_BYTELEN; | |
3289 | req.ndm.ndm_family = AF_INET6; | |
3290 | } | |
3291 | ||
3292 | addattr_l(&req.n, sizeof(req), NDA_DST, &ip->ip.addr, ipa_len); | |
3293 | ||
3294 | return netlink_request(&zns->netlink_cmd, &req.n); | |
3295 | } | |
3296 | ||
3297 | int netlink_neigh_read_specific_ip(struct ipaddr *ip, | |
3298 | struct interface *vlan_if) | |
3299 | { | |
3300 | int ret = 0; | |
3301 | struct zebra_ns *zns; | |
3302 | struct zebra_vrf *zvrf = zebra_vrf_lookup_by_id(vlan_if->vrf_id); | |
3303 | char buf[INET6_ADDRSTRLEN]; | |
3304 | struct zebra_dplane_info dp_info; | |
3305 | ||
3306 | zns = zvrf->zns; | |
3307 | ||
3308 | zebra_dplane_info_from_zns(&dp_info, zns, true /*is_cmd*/); | |
3309 | ||
3310 | if (IS_ZEBRA_DEBUG_KERNEL) | |
3311 | zlog_debug("%s: neigh request IF %s(%u) IP %s vrf_id %u", | |
3312 | __PRETTY_FUNCTION__, vlan_if->name, | |
3313 | vlan_if->ifindex, | |
3314 | ipaddr2str(ip, buf, sizeof(buf)), | |
3315 | vlan_if->vrf_id); | |
3316 | ||
3317 | ret = netlink_request_specific_neigh_in_vlan(zns, RTM_GETNEIGH, ip, | |
3318 | vlan_if->ifindex); | |
3319 | if (ret < 0) | |
3320 | return ret; | |
3321 | ||
3322 | ret = netlink_parse_info(netlink_neigh_table, &zns->netlink_cmd, | |
3323 | &dp_info, 1, 0); | |
3324 | ||
3325 | return ret; | |
3326 | } | |
3327 | ||
2414abd3 | 3328 | int netlink_neigh_change(struct nlmsghdr *h, ns_id_t ns_id) |
2232a77c | 3329 | { |
d62a17ae | 3330 | int len; |
3331 | struct ndmsg *ndm; | |
2232a77c | 3332 | |
d62a17ae | 3333 | if (!(h->nlmsg_type == RTM_NEWNEIGH || h->nlmsg_type == RTM_DELNEIGH)) |
3334 | return 0; | |
2232a77c | 3335 | |
d62a17ae | 3336 | /* Length validity. */ |
3337 | len = h->nlmsg_len - NLMSG_LENGTH(sizeof(struct ndmsg)); | |
9bdf8618 DS |
3338 | if (len < 0) { |
3339 | zlog_err("%s: Message received from netlink is of a broken size %d %zu", | |
3340 | __PRETTY_FUNCTION__, h->nlmsg_len, | |
3341 | (size_t)NLMSG_LENGTH(sizeof(struct ndmsg))); | |
d62a17ae | 3342 | return -1; |
9bdf8618 | 3343 | } |
2232a77c | 3344 | |
d62a17ae | 3345 | /* Is this a notification for the MAC FDB or IP neighbor table? */ |
3346 | ndm = NLMSG_DATA(h); | |
3347 | if (ndm->ndm_family == AF_BRIDGE) | |
2414abd3 | 3348 | return netlink_macfdb_change(h, len, ns_id); |
2232a77c | 3349 | |
d62a17ae | 3350 | if (ndm->ndm_type != RTN_UNICAST) |
3351 | return 0; | |
2232a77c | 3352 | |
d62a17ae | 3353 | if (ndm->ndm_family == AF_INET || ndm->ndm_family == AF_INET6) |
2414abd3 | 3354 | return netlink_ipneigh_change(h, len, ns_id); |
8a1b681c | 3355 | else { |
9df414fe | 3356 | flog_warn( |
e914ccbe | 3357 | EC_ZEBRA_UNKNOWN_FAMILY, |
87b5d1b0 DS |
3358 | "Invalid address family: %u received from kernel neighbor change: %s", |
3359 | ndm->ndm_family, nl_msg_type_to_str(h->nlmsg_type)); | |
8a1b681c SW |
3360 | return 0; |
3361 | } | |
2232a77c | 3362 | |
d62a17ae | 3363 | return 0; |
2232a77c | 3364 | } |
3365 | ||
931fa60c MS |
3366 | /* |
3367 | * Utility neighbor-update function, using info from dplane context. | |
3368 | */ | |
3369 | static int netlink_neigh_update_ctx(const struct zebra_dplane_ctx *ctx, | |
3370 | int cmd) | |
2232a77c | 3371 | { |
f3dbec60 | 3372 | uint8_t protocol = RTPROT_ZEBRA; |
d62a17ae | 3373 | struct { |
3374 | struct nlmsghdr n; | |
3375 | struct ndmsg ndm; | |
3376 | char buf[256]; | |
3377 | } req; | |
3378 | int ipa_len; | |
d62a17ae | 3379 | char buf[INET6_ADDRSTRLEN]; |
3380 | char buf2[ETHER_ADDR_STRLEN]; | |
931fa60c MS |
3381 | const struct ipaddr *ip; |
3382 | const struct ethaddr *mac; | |
3383 | uint8_t flags; | |
3384 | uint16_t state; | |
d62a17ae | 3385 | |
5605ecfc | 3386 | memset(&req, 0, sizeof(req)); |
d62a17ae | 3387 | |
931fa60c MS |
3388 | ip = dplane_ctx_neigh_get_ipaddr(ctx); |
3389 | mac = dplane_ctx_neigh_get_mac(ctx); | |
3390 | if (is_zero_mac(mac)) | |
3391 | mac = NULL; | |
3392 | ||
3393 | flags = neigh_flags_to_netlink(dplane_ctx_neigh_get_flags(ctx)); | |
3394 | state = neigh_state_to_netlink(dplane_ctx_neigh_get_state(ctx)); | |
3395 | ||
d62a17ae | 3396 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)); |
3397 | req.n.nlmsg_flags = NLM_F_REQUEST; | |
3398 | if (cmd == RTM_NEWNEIGH) | |
3399 | req.n.nlmsg_flags |= (NLM_F_CREATE | NLM_F_REPLACE); | |
3400 | req.n.nlmsg_type = cmd; // RTM_NEWNEIGH or RTM_DELNEIGH | |
3401 | req.ndm.ndm_family = IS_IPADDR_V4(ip) ? AF_INET : AF_INET6; | |
68e33151 | 3402 | req.ndm.ndm_state = state; |
931fa60c | 3403 | req.ndm.ndm_ifindex = dplane_ctx_get_ifindex(ctx); |
d62a17ae | 3404 | req.ndm.ndm_type = RTN_UNICAST; |
68e33151 | 3405 | req.ndm.ndm_flags = flags; |
d62a17ae | 3406 | |
f3dbec60 DS |
3407 | addattr_l(&req.n, sizeof(req), |
3408 | NDA_PROTOCOL, &protocol, sizeof(protocol)); | |
d62a17ae | 3409 | ipa_len = IS_IPADDR_V4(ip) ? IPV4_MAX_BYTELEN : IPV6_MAX_BYTELEN; |
3410 | addattr_l(&req.n, sizeof(req), NDA_DST, &ip->ip.addr, ipa_len); | |
3411 | if (mac) | |
3412 | addattr_l(&req.n, sizeof(req), NDA_LLADDR, mac, 6); | |
3413 | ||
3414 | if (IS_ZEBRA_DEBUG_KERNEL) | |
6fe2b0e6 | 3415 | zlog_debug("Tx %s family %s IF %s(%u) Neigh %s MAC %s flags 0x%x state 0x%x", |
d62a17ae | 3416 | nl_msg_type_to_str(cmd), |
931fa60c MS |
3417 | nl_family_to_str(req.ndm.ndm_family), |
3418 | dplane_ctx_get_ifname(ctx), | |
3419 | dplane_ctx_get_ifindex(ctx), | |
3420 | ipaddr2str(ip, buf, sizeof(buf)), | |
d62a17ae | 3421 | mac ? prefix_mac2str(mac, buf2, sizeof(buf2)) |
931fa60c MS |
3422 | : "null", |
3423 | flags, state); | |
d62a17ae | 3424 | |
931fa60c MS |
3425 | return netlink_talk_info(netlink_talk_filter, &req.n, |
3426 | dplane_ctx_get_ns(ctx), 0); | |
2232a77c | 3427 | } |
3428 | ||
036d93c0 MS |
3429 | /* |
3430 | * Update MAC, using dataplane context object. | |
3431 | */ | |
3432 | enum zebra_dplane_result kernel_mac_update_ctx(struct zebra_dplane_ctx *ctx) | |
2232a77c | 3433 | { |
036d93c0 | 3434 | return netlink_macfdb_update_ctx(ctx); |
2232a77c | 3435 | } |
3436 | ||
931fa60c | 3437 | enum zebra_dplane_result kernel_neigh_update_ctx(struct zebra_dplane_ctx *ctx) |
2232a77c | 3438 | { |
931fa60c | 3439 | int ret = -1; |
2232a77c | 3440 | |
931fa60c MS |
3441 | switch (dplane_ctx_get_op(ctx)) { |
3442 | case DPLANE_OP_NEIGH_INSTALL: | |
3443 | case DPLANE_OP_NEIGH_UPDATE: | |
3444 | ret = netlink_neigh_update_ctx(ctx, RTM_NEWNEIGH); | |
3445 | break; | |
3446 | case DPLANE_OP_NEIGH_DELETE: | |
3447 | ret = netlink_neigh_update_ctx(ctx, RTM_DELNEIGH); | |
3448 | break; | |
0bbd4ff4 MS |
3449 | case DPLANE_OP_VTEP_ADD: |
3450 | ret = netlink_vxlan_flood_update_ctx(ctx, RTM_NEWNEIGH); | |
3451 | break; | |
3452 | case DPLANE_OP_VTEP_DELETE: | |
3453 | ret = netlink_vxlan_flood_update_ctx(ctx, RTM_DELNEIGH); | |
3454 | break; | |
931fa60c MS |
3455 | default: |
3456 | break; | |
3457 | } | |
2232a77c | 3458 | |
931fa60c MS |
3459 | return (ret == 0 ? |
3460 | ZEBRA_DPLANE_REQUEST_SUCCESS : ZEBRA_DPLANE_REQUEST_FAILURE); | |
6fe2b0e6 CS |
3461 | } |
3462 | ||
16c628de MS |
3463 | /* |
3464 | * MPLS label forwarding table change via netlink interface, using dataplane | |
3465 | * context information. | |
3466 | */ | |
fc608372 | 3467 | int netlink_mpls_multipath(int cmd, struct zebra_dplane_ctx *ctx) |
16c628de MS |
3468 | { |
3469 | mpls_lse_t lse; | |
81793ac1 | 3470 | const zebra_nhlfe_t *nhlfe; |
16c628de MS |
3471 | struct nexthop *nexthop = NULL; |
3472 | unsigned int nexthop_num; | |
3473 | const char *routedesc; | |
3474 | int route_type; | |
3475 | ||
3476 | struct { | |
3477 | struct nlmsghdr n; | |
3478 | struct rtmsg r; | |
3479 | char buf[NL_PKT_BUF_SIZE]; | |
3480 | } req; | |
3481 | ||
3482 | memset(&req, 0, sizeof(req) - NL_PKT_BUF_SIZE); | |
3483 | ||
3484 | /* | |
3485 | * Count # nexthops so we can decide whether to use singlepath | |
3486 | * or multipath case. | |
3487 | */ | |
3488 | nexthop_num = 0; | |
3489 | for (nhlfe = dplane_ctx_get_nhlfe(ctx); nhlfe; nhlfe = nhlfe->next) { | |
3490 | nexthop = nhlfe->nexthop; | |
3491 | if (!nexthop) | |
3492 | continue; | |
3493 | if (cmd == RTM_NEWROUTE) { | |
3494 | /* Count all selected NHLFEs */ | |
3495 | if (CHECK_FLAG(nhlfe->flags, NHLFE_FLAG_SELECTED) | |
3496 | && CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE)) | |
3497 | nexthop_num++; | |
3498 | } else { /* DEL */ | |
3499 | /* Count all installed NHLFEs */ | |
3500 | if (CHECK_FLAG(nhlfe->flags, NHLFE_FLAG_INSTALLED) | |
3501 | && CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB)) | |
3502 | nexthop_num++; | |
3503 | } | |
3504 | } | |
3505 | ||
3506 | if ((nexthop_num == 0) || | |
3507 | (!dplane_ctx_get_best_nhlfe(ctx) && (cmd != RTM_DELROUTE))) | |
3508 | return 0; | |
3509 | ||
3510 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)); | |
3511 | req.n.nlmsg_flags = NLM_F_CREATE | NLM_F_REQUEST; | |
3512 | req.n.nlmsg_type = cmd; | |
3513 | req.n.nlmsg_pid = dplane_ctx_get_ns(ctx)->nls.snl.nl_pid; | |
3514 | ||
3515 | req.r.rtm_family = AF_MPLS; | |
3516 | req.r.rtm_table = RT_TABLE_MAIN; | |
3517 | req.r.rtm_dst_len = MPLS_LABEL_LEN_BITS; | |
3518 | req.r.rtm_scope = RT_SCOPE_UNIVERSE; | |
3519 | req.r.rtm_type = RTN_UNICAST; | |
3520 | ||
3521 | if (cmd == RTM_NEWROUTE) { | |
3522 | /* We do a replace to handle update. */ | |
3523 | req.n.nlmsg_flags |= NLM_F_REPLACE; | |
3524 | ||
3525 | /* set the protocol value if installing */ | |
3526 | route_type = re_type_from_lsp_type( | |
3527 | dplane_ctx_get_best_nhlfe(ctx)->type); | |
3528 | req.r.rtm_protocol = zebra2proto(route_type); | |
3529 | } | |
3530 | ||
3531 | /* Fill destination */ | |
3532 | lse = mpls_lse_encode(dplane_ctx_get_in_label(ctx), 0, 0, 1); | |
3533 | addattr_l(&req.n, sizeof(req), RTA_DST, &lse, sizeof(mpls_lse_t)); | |
3534 | ||
3535 | /* Fill nexthops (paths) based on single-path or multipath. The paths | |
3536 | * chosen depend on the operation. | |
3537 | */ | |
fc608372 | 3538 | if (nexthop_num == 1) { |
16c628de MS |
3539 | routedesc = "single-path"; |
3540 | _netlink_mpls_debug(cmd, dplane_ctx_get_in_label(ctx), | |
3541 | routedesc); | |
3542 | ||
3543 | nexthop_num = 0; | |
3544 | for (nhlfe = dplane_ctx_get_nhlfe(ctx); | |
3545 | nhlfe; nhlfe = nhlfe->next) { | |
3546 | nexthop = nhlfe->nexthop; | |
3547 | if (!nexthop) | |
3548 | continue; | |
3549 | ||
3550 | if ((cmd == RTM_NEWROUTE | |
3551 | && (CHECK_FLAG(nhlfe->flags, NHLFE_FLAG_SELECTED) | |
3552 | && CHECK_FLAG(nexthop->flags, | |
3553 | NEXTHOP_FLAG_ACTIVE))) | |
3554 | || (cmd == RTM_DELROUTE | |
3555 | && (CHECK_FLAG(nhlfe->flags, | |
3556 | NHLFE_FLAG_INSTALLED) | |
3557 | && CHECK_FLAG(nexthop->flags, | |
3558 | NEXTHOP_FLAG_FIB)))) { | |
3559 | /* Add the gateway */ | |
3560 | _netlink_mpls_build_singlepath( | |
3561 | routedesc, nhlfe, | |
3562 | &req.n, &req.r, | |
3563 | sizeof(req), cmd); | |
3564 | ||
3565 | nexthop_num++; | |
3566 | break; | |
3567 | } | |
3568 | } | |
3569 | } else { /* Multipath case */ | |
3570 | char buf[NL_PKT_BUF_SIZE]; | |
3571 | struct rtattr *rta = (void *)buf; | |
3572 | struct rtnexthop *rtnh; | |
81793ac1 | 3573 | const union g_addr *src1 = NULL; |
16c628de MS |
3574 | |
3575 | rta->rta_type = RTA_MULTIPATH; | |
3576 | rta->rta_len = RTA_LENGTH(0); | |
3577 | rtnh = RTA_DATA(rta); | |
3578 | ||
3579 | routedesc = "multipath"; | |
3580 | _netlink_mpls_debug(cmd, dplane_ctx_get_in_label(ctx), | |
3581 | routedesc); | |
3582 | ||
3583 | nexthop_num = 0; | |
3584 | for (nhlfe = dplane_ctx_get_nhlfe(ctx); | |
3585 | nhlfe; nhlfe = nhlfe->next) { | |
3586 | nexthop = nhlfe->nexthop; | |
3587 | if (!nexthop) | |
3588 | continue; | |
3589 | ||
16c628de MS |
3590 | if ((cmd == RTM_NEWROUTE |
3591 | && (CHECK_FLAG(nhlfe->flags, NHLFE_FLAG_SELECTED) | |
3592 | && CHECK_FLAG(nexthop->flags, | |
3593 | NEXTHOP_FLAG_ACTIVE))) | |
3594 | || (cmd == RTM_DELROUTE | |
3595 | && (CHECK_FLAG(nhlfe->flags, | |
3596 | NHLFE_FLAG_INSTALLED) | |
3597 | && CHECK_FLAG(nexthop->flags, | |
3598 | NEXTHOP_FLAG_FIB)))) { | |
3599 | nexthop_num++; | |
3600 | ||
3601 | /* Build the multipath */ | |
3602 | _netlink_mpls_build_multipath(routedesc, nhlfe, | |
3603 | rta, rtnh, &req.r, | |
3604 | &src1); | |
3605 | rtnh = RTNH_NEXT(rtnh); | |
3606 | } | |
3607 | } | |
3608 | ||
3609 | /* Add the multipath */ | |
3610 | if (rta->rta_len > RTA_LENGTH(0)) | |
3611 | addattr_l(&req.n, NL_PKT_BUF_SIZE, RTA_MULTIPATH, | |
3612 | RTA_DATA(rta), RTA_PAYLOAD(rta)); | |
3613 | } | |
3614 | ||
3615 | /* Talk to netlink socket. */ | |
3616 | return netlink_talk_info(netlink_talk_filter, &req.n, | |
3617 | dplane_ctx_get_ns(ctx), 0); | |
3618 | } | |
ddfeb486 | 3619 | #endif /* HAVE_NETLINK */ |