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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> | |
718e3744 | 30 | |
31 | /* Hack for GNU libc version 2. */ | |
32 | #ifndef MSG_TRUNC | |
33 | #define MSG_TRUNC 0x20 | |
34 | #endif /* MSG_TRUNC */ | |
35 | ||
36 | #include "linklist.h" | |
37 | #include "if.h" | |
38 | #include "log.h" | |
39 | #include "prefix.h" | |
40 | #include "connected.h" | |
41 | #include "table.h" | |
26e2ae36 | 42 | #include "memory.h" |
4a1ab8e4 | 43 | #include "zebra_memory.h" |
718e3744 | 44 | #include "rib.h" |
e04ab74d | 45 | #include "thread.h" |
edd7c245 | 46 | #include "privs.h" |
fb018d25 | 47 | #include "nexthop.h" |
78104b9b | 48 | #include "vrf.h" |
5e6a74d8 | 49 | #include "vty.h" |
40c7bdb0 | 50 | #include "mpls.h" |
13d60d35 | 51 | #include "vxlan.h" |
718e3744 | 52 | |
bf094f69 | 53 | #include "zebra/zapi_msg.h" |
fe18ee2d | 54 | #include "zebra/zebra_ns.h" |
7c551956 | 55 | #include "zebra/zebra_vrf.h" |
6621ca86 | 56 | #include "zebra/rt.h" |
718e3744 | 57 | #include "zebra/redistribute.h" |
58 | #include "zebra/interface.h" | |
59 | #include "zebra/debug.h" | |
12f6fb97 | 60 | #include "zebra/rtadv.h" |
567b877d | 61 | #include "zebra/zebra_ptm.h" |
40c7bdb0 | 62 | #include "zebra/zebra_mpls.h" |
1fdc9eae | 63 | #include "zebra/kernel_netlink.h" |
64 | #include "zebra/rt_netlink.h" | |
e3be0432 | 65 | #include "zebra/zebra_mroute.h" |
2232a77c | 66 | #include "zebra/zebra_vxlan.h" |
e3be0432 | 67 | |
40c7bdb0 | 68 | #ifndef AF_MPLS |
69 | #define AF_MPLS 28 | |
70 | #endif | |
71 | ||
2232a77c | 72 | static vlanid_t filter_vlan = 0; |
73 | ||
d62a17ae | 74 | struct gw_family_t { |
d7c0a89a QY |
75 | uint16_t filler; |
76 | uint16_t family; | |
d62a17ae | 77 | union g_addr gate; |
40c7bdb0 | 78 | }; |
79 | ||
8755598a DS |
80 | char ipv4_ll_buf[16] = "169.254.0.1"; |
81 | struct in_addr ipv4_ll; | |
82 | ||
83 | /* | |
84 | * The ipv4_ll data structure is used for all 5549 | |
85 | * additions to the kernel. Let's figure out the | |
86 | * correct value one time instead for every | |
87 | * install/remove of a 5549 type route | |
88 | */ | |
d62a17ae | 89 | void rt_netlink_init(void) |
8755598a | 90 | { |
d62a17ae | 91 | inet_pton(AF_INET, ipv4_ll_buf, &ipv4_ll); |
8755598a DS |
92 | } |
93 | ||
23b1f334 DD |
94 | static inline int is_selfroute(int proto) |
95 | { | |
d62a17ae | 96 | if ((proto == RTPROT_BGP) || (proto == RTPROT_OSPF) |
97 | || (proto == RTPROT_STATIC) || (proto == RTPROT_ZEBRA) | |
98 | || (proto == RTPROT_ISIS) || (proto == RTPROT_RIPNG) | |
99 | || (proto == RTPROT_NHRP) || (proto == RTPROT_EIGRP) | |
915902cb | 100 | || (proto == RTPROT_LDP) || (proto == RTPROT_BABEL) |
8a71d93d | 101 | || (proto == RTPROT_RIP) || (proto == RTPROT_SHARP)) { |
d62a17ae | 102 | return 1; |
103 | } | |
104 | ||
105 | return 0; | |
23b1f334 DD |
106 | } |
107 | ||
915902cb | 108 | static inline int zebra2proto(int proto) |
23b1f334 | 109 | { |
d62a17ae | 110 | switch (proto) { |
111 | case ZEBRA_ROUTE_BABEL: | |
112 | proto = RTPROT_BABEL; | |
113 | break; | |
114 | case ZEBRA_ROUTE_BGP: | |
115 | proto = RTPROT_BGP; | |
116 | break; | |
117 | case ZEBRA_ROUTE_OSPF: | |
118 | case ZEBRA_ROUTE_OSPF6: | |
119 | proto = RTPROT_OSPF; | |
120 | break; | |
121 | case ZEBRA_ROUTE_STATIC: | |
122 | proto = RTPROT_STATIC; | |
123 | break; | |
124 | case ZEBRA_ROUTE_ISIS: | |
125 | proto = RTPROT_ISIS; | |
126 | break; | |
127 | case ZEBRA_ROUTE_RIP: | |
128 | proto = RTPROT_RIP; | |
129 | break; | |
130 | case ZEBRA_ROUTE_RIPNG: | |
131 | proto = RTPROT_RIPNG; | |
132 | break; | |
133 | case ZEBRA_ROUTE_NHRP: | |
134 | proto = RTPROT_NHRP; | |
135 | break; | |
136 | case ZEBRA_ROUTE_EIGRP: | |
137 | proto = RTPROT_EIGRP; | |
138 | break; | |
139 | case ZEBRA_ROUTE_LDP: | |
140 | proto = RTPROT_LDP; | |
141 | break; | |
8a71d93d DS |
142 | case ZEBRA_ROUTE_SHARP: |
143 | proto = RTPROT_SHARP; | |
144 | break; | |
d62a17ae | 145 | default: |
146 | proto = RTPROT_ZEBRA; | |
147 | break; | |
148 | } | |
149 | ||
150 | return proto; | |
23b1f334 DD |
151 | } |
152 | ||
915902cb DS |
153 | static inline int proto2zebra(int proto, int family) |
154 | { | |
155 | switch (proto) { | |
156 | case RTPROT_BABEL: | |
157 | proto = ZEBRA_ROUTE_BABEL; | |
158 | break; | |
159 | case RTPROT_BGP: | |
160 | proto = ZEBRA_ROUTE_BGP; | |
161 | break; | |
162 | case RTPROT_OSPF: | |
996c9314 LB |
163 | proto = (family == AFI_IP) ? ZEBRA_ROUTE_OSPF |
164 | : ZEBRA_ROUTE_OSPF6; | |
915902cb DS |
165 | break; |
166 | case RTPROT_ISIS: | |
167 | proto = ZEBRA_ROUTE_ISIS; | |
168 | break; | |
169 | case RTPROT_RIP: | |
170 | proto = ZEBRA_ROUTE_RIP; | |
171 | break; | |
172 | case RTPROT_RIPNG: | |
173 | proto = ZEBRA_ROUTE_RIPNG; | |
174 | break; | |
175 | case RTPROT_NHRP: | |
176 | proto = ZEBRA_ROUTE_NHRP; | |
177 | break; | |
178 | case RTPROT_EIGRP: | |
179 | proto = ZEBRA_ROUTE_EIGRP; | |
180 | break; | |
181 | case RTPROT_LDP: | |
182 | proto = ZEBRA_ROUTE_LDP; | |
183 | break; | |
184 | case RTPROT_STATIC: | |
185 | proto = ZEBRA_ROUTE_STATIC; | |
186 | break; | |
187 | default: | |
188 | proto = ZEBRA_ROUTE_KERNEL; | |
189 | break; | |
190 | } | |
191 | return proto; | |
192 | } | |
193 | ||
12f6fb97 DS |
194 | /* |
195 | Pending: create an efficient table_id (in a tree/hash) based lookup) | |
196 | */ | |
d7c0a89a | 197 | static vrf_id_t vrf_lookup_by_table(uint32_t table_id, ns_id_t ns_id) |
12f6fb97 | 198 | { |
d62a17ae | 199 | struct vrf *vrf; |
200 | struct zebra_vrf *zvrf; | |
12f6fb97 | 201 | |
a2addae8 | 202 | RB_FOREACH (vrf, vrf_id_head, &vrfs_by_id) { |
78dd30b2 PG |
203 | zvrf = vrf->info; |
204 | if (zvrf == NULL) | |
d62a17ae | 205 | continue; |
78dd30b2 PG |
206 | /* case vrf with netns : match the netnsid */ |
207 | if (vrf_is_backend_netns()) { | |
208 | if (ns_id == zvrf_id(zvrf)) | |
209 | return zvrf_id(zvrf); | |
210 | } else { | |
211 | /* VRF is VRF_BACKEND_VRF_LITE */ | |
212 | if (zvrf->table_id != table_id) | |
213 | continue; | |
214 | return zvrf_id(zvrf); | |
215 | } | |
d62a17ae | 216 | } |
12f6fb97 | 217 | |
d62a17ae | 218 | return VRF_DEFAULT; |
12f6fb97 DS |
219 | } |
220 | ||
718e3744 | 221 | /* Looking up routing table by netlink interface. */ |
d62a17ae | 222 | static int netlink_route_change_read_unicast(struct sockaddr_nl *snl, |
223 | struct nlmsghdr *h, ns_id_t ns_id, | |
224 | int startup) | |
718e3744 | 225 | { |
d62a17ae | 226 | int len; |
227 | struct rtmsg *rtm; | |
228 | struct rtattr *tb[RTA_MAX + 1]; | |
d7c0a89a | 229 | uint8_t flags = 0; |
d62a17ae | 230 | struct prefix p; |
792fa92e | 231 | struct prefix_ipv6 src_p = {}; |
78dd30b2 | 232 | vrf_id_t vrf_id; |
d62a17ae | 233 | |
234 | char anyaddr[16] = {0}; | |
235 | ||
915902cb | 236 | int proto = ZEBRA_ROUTE_KERNEL; |
d62a17ae | 237 | int index = 0; |
238 | int table; | |
239 | int metric = 0; | |
d7c0a89a | 240 | uint32_t mtu = 0; |
25715c7e | 241 | uint8_t distance = 0; |
4e40b6d6 | 242 | route_tag_t tag = 0; |
d62a17ae | 243 | |
244 | void *dest = NULL; | |
245 | void *gate = NULL; | |
246 | void *prefsrc = NULL; /* IPv4 preferred source host address */ | |
247 | void *src = NULL; /* IPv6 srcdest source prefix */ | |
e655a03c | 248 | enum blackhole_type bh_type = BLACKHOLE_UNSPEC; |
d62a17ae | 249 | |
250 | rtm = NLMSG_DATA(h); | |
251 | ||
252 | if (startup && h->nlmsg_type != RTM_NEWROUTE) | |
253 | return 0; | |
e655a03c DL |
254 | switch (rtm->rtm_type) { |
255 | case RTN_UNICAST: | |
256 | break; | |
257 | case RTN_BLACKHOLE: | |
258 | bh_type = BLACKHOLE_NULL; | |
259 | break; | |
260 | case RTN_UNREACHABLE: | |
261 | bh_type = BLACKHOLE_REJECT; | |
262 | break; | |
263 | case RTN_PROHIBIT: | |
264 | bh_type = BLACKHOLE_ADMINPROHIB; | |
265 | break; | |
266 | default: | |
d62a17ae | 267 | return 0; |
e655a03c | 268 | } |
d62a17ae | 269 | |
270 | len = h->nlmsg_len - NLMSG_LENGTH(sizeof(struct rtmsg)); | |
271 | if (len < 0) | |
272 | return -1; | |
273 | ||
274 | memset(tb, 0, sizeof tb); | |
275 | netlink_parse_rtattr(tb, RTA_MAX, RTM_RTA(rtm), len); | |
276 | ||
277 | if (rtm->rtm_flags & RTM_F_CLONED) | |
278 | return 0; | |
279 | if (rtm->rtm_protocol == RTPROT_REDIRECT) | |
280 | return 0; | |
281 | if (rtm->rtm_protocol == RTPROT_KERNEL) | |
282 | return 0; | |
283 | ||
284 | if (!startup && is_selfroute(rtm->rtm_protocol) | |
285 | && h->nlmsg_type == RTM_NEWROUTE) | |
286 | return 0; | |
287 | ||
288 | /* We don't care about change notifications for the MPLS table. */ | |
289 | /* TODO: Revisit this. */ | |
290 | if (rtm->rtm_family == AF_MPLS) | |
291 | return 0; | |
292 | ||
293 | /* Table corresponding to route. */ | |
294 | if (tb[RTA_TABLE]) | |
295 | table = *(int *)RTA_DATA(tb[RTA_TABLE]); | |
296 | else | |
297 | table = rtm->rtm_table; | |
298 | ||
299 | /* Map to VRF */ | |
78dd30b2 | 300 | vrf_id = vrf_lookup_by_table(table, ns_id); |
d62a17ae | 301 | if (vrf_id == VRF_DEFAULT) { |
302 | if (!is_zebra_valid_kernel_table(table) | |
303 | && !is_zebra_main_routing_table(table)) | |
304 | return 0; | |
305 | } | |
306 | ||
307 | /* Route which inserted by Zebra. */ | |
915902cb | 308 | if (is_selfroute(rtm->rtm_protocol)) { |
d62a17ae | 309 | flags |= ZEBRA_FLAG_SELFROUTE; |
915902cb DS |
310 | proto = proto2zebra(rtm->rtm_protocol, rtm->rtm_family); |
311 | } | |
d62a17ae | 312 | if (tb[RTA_OIF]) |
313 | index = *(int *)RTA_DATA(tb[RTA_OIF]); | |
314 | ||
315 | if (tb[RTA_DST]) | |
316 | dest = RTA_DATA(tb[RTA_DST]); | |
317 | else | |
318 | dest = anyaddr; | |
319 | ||
320 | if (tb[RTA_SRC]) | |
321 | src = RTA_DATA(tb[RTA_SRC]); | |
322 | else | |
323 | src = anyaddr; | |
324 | ||
325 | if (tb[RTA_PREFSRC]) | |
326 | prefsrc = RTA_DATA(tb[RTA_PREFSRC]); | |
327 | ||
328 | if (tb[RTA_GATEWAY]) | |
329 | gate = RTA_DATA(tb[RTA_GATEWAY]); | |
330 | ||
f19435a8 DS |
331 | if (tb[RTA_PRIORITY]) |
332 | metric = *(int *)RTA_DATA(tb[RTA_PRIORITY]); | |
d62a17ae | 333 | |
4e40b6d6 KK |
334 | #if defined(SUPPORT_REALMS) |
335 | if (tb[RTA_FLOW]) | |
336 | tag = *(uint32_t *)RTA_DATA(tb[RTA_FLOW]); | |
337 | #endif | |
338 | ||
f19435a8 DS |
339 | if (tb[RTA_METRICS]) { |
340 | struct rtattr *mxrta[RTAX_MAX + 1]; | |
d62a17ae | 341 | |
f19435a8 | 342 | memset(mxrta, 0, sizeof mxrta); |
996c9314 | 343 | netlink_parse_rtattr(mxrta, RTAX_MAX, RTA_DATA(tb[RTA_METRICS]), |
f19435a8 | 344 | RTA_PAYLOAD(tb[RTA_METRICS])); |
d62a17ae | 345 | |
f19435a8 | 346 | if (mxrta[RTAX_MTU]) |
d7c0a89a | 347 | mtu = *(uint32_t *)RTA_DATA(mxrta[RTAX_MTU]); |
d62a17ae | 348 | } |
349 | ||
350 | if (rtm->rtm_family == AF_INET) { | |
351 | p.family = AF_INET; | |
352 | memcpy(&p.u.prefix4, dest, 4); | |
353 | p.prefixlen = rtm->rtm_dst_len; | |
354 | ||
355 | src_p.prefixlen = | |
356 | 0; // Forces debug below to not display anything | |
357 | } else if (rtm->rtm_family == AF_INET6) { | |
358 | p.family = AF_INET6; | |
359 | memcpy(&p.u.prefix6, dest, 16); | |
360 | p.prefixlen = rtm->rtm_dst_len; | |
361 | ||
362 | src_p.family = AF_INET6; | |
363 | memcpy(&src_p.prefix, src, 16); | |
364 | src_p.prefixlen = rtm->rtm_src_len; | |
365 | } | |
366 | ||
367 | if (rtm->rtm_src_len != 0) { | |
368 | char buf[PREFIX_STRLEN]; | |
369 | zlog_warn( | |
370 | "unsupported IPv[4|6] sourcedest route (dest %s vrf %u)", | |
371 | prefix2str(&p, buf, sizeof(buf)), vrf_id); | |
372 | return 0; | |
373 | } | |
374 | ||
25715c7e DS |
375 | /* |
376 | * For ZEBRA_ROUTE_KERNEL types: | |
377 | * | |
378 | * The metric/priority of the route received from the kernel | |
379 | * is a 32 bit number. We are going to interpret the high | |
380 | * order byte as the Admin Distance and the low order 3 bytes | |
381 | * as the metric. | |
382 | * | |
383 | * This will allow us to do two things: | |
384 | * 1) Allow the creation of kernel routes that can be | |
385 | * overridden by zebra. | |
386 | * 2) Allow the old behavior for 'most' kernel route types | |
387 | * if a user enters 'ip route ...' v4 routes get a metric | |
388 | * of 0 and v6 routes get a metric of 1024. Both of these | |
389 | * values will end up with a admin distance of 0, which | |
390 | * will cause them to win for the purposes of zebra. | |
391 | */ | |
392 | if (proto == ZEBRA_ROUTE_KERNEL) { | |
393 | distance = (metric >> 24) & 0xFF; | |
996c9314 | 394 | metric = (metric & 0x00FFFFFF); |
25715c7e DS |
395 | } |
396 | ||
d62a17ae | 397 | if (IS_ZEBRA_DEBUG_KERNEL) { |
398 | char buf[PREFIX_STRLEN]; | |
399 | char buf2[PREFIX_STRLEN]; | |
45df4e96 | 400 | zlog_debug("%s %s%s%s vrf %u(%u) metric: %d Admin Distance: %d", |
996c9314 LB |
401 | nl_msg_type_to_str(h->nlmsg_type), |
402 | prefix2str(&p, buf, sizeof(buf)), | |
403 | src_p.prefixlen ? " from " : "", | |
404 | src_p.prefixlen | |
405 | ? prefix2str(&src_p, buf2, sizeof(buf2)) | |
406 | : "", | |
45df4e96 | 407 | vrf_id, table, metric, distance); |
d62a17ae | 408 | } |
409 | ||
410 | afi_t afi = AFI_IP; | |
411 | if (rtm->rtm_family == AF_INET6) | |
412 | afi = AFI_IP6; | |
413 | ||
414 | if (h->nlmsg_type == RTM_NEWROUTE) { | |
8795f904 DS |
415 | struct interface *ifp; |
416 | vrf_id_t nh_vrf_id = vrf_id; | |
417 | ||
fd36be7e DL |
418 | if (!tb[RTA_MULTIPATH]) { |
419 | struct nexthop nh; | |
420 | size_t sz = (afi == AFI_IP) ? 4 : 16; | |
421 | ||
422 | memset(&nh, 0, sizeof(nh)); | |
af760ec1 DS |
423 | |
424 | if (bh_type == BLACKHOLE_UNSPEC) { | |
425 | if (index && !gate) | |
426 | nh.type = NEXTHOP_TYPE_IFINDEX; | |
427 | else if (index && gate) | |
996c9314 LB |
428 | nh.type = |
429 | (afi == AFI_IP) | |
430 | ? NEXTHOP_TYPE_IPV4_IFINDEX | |
431 | : NEXTHOP_TYPE_IPV6_IFINDEX; | |
af760ec1 | 432 | else if (!index && gate) |
1dca2eaa RW |
433 | nh.type = (afi == AFI_IP) |
434 | ? NEXTHOP_TYPE_IPV4 | |
435 | : NEXTHOP_TYPE_IPV6; | |
af760ec1 DS |
436 | else { |
437 | nh.type = NEXTHOP_TYPE_BLACKHOLE; | |
438 | nh.bh_type = bh_type; | |
439 | } | |
440 | } else { | |
fd36be7e | 441 | nh.type = NEXTHOP_TYPE_BLACKHOLE; |
e655a03c DL |
442 | nh.bh_type = bh_type; |
443 | } | |
fd36be7e DL |
444 | nh.ifindex = index; |
445 | if (prefsrc) | |
446 | memcpy(&nh.src, prefsrc, sz); | |
447 | if (gate) | |
448 | memcpy(&nh.gate, gate, sz); | |
915902cb | 449 | |
8795f904 | 450 | if (index) { |
996c9314 | 451 | ifp = if_lookup_by_index(index, VRF_UNKNOWN); |
8795f904 DS |
452 | if (ifp) |
453 | nh_vrf_id = ifp->vrf_id; | |
454 | } | |
4a7371e9 | 455 | nh.vrf_id = nh_vrf_id; |
8795f904 | 456 | |
4a7371e9 DS |
457 | rib_add(afi, SAFI_UNICAST, vrf_id, proto, 0, flags, &p, |
458 | NULL, &nh, table, metric, mtu, distance, tag); | |
fd36be7e | 459 | } else { |
d62a17ae | 460 | /* This is a multipath route */ |
461 | ||
462 | struct route_entry *re; | |
463 | struct rtnexthop *rtnh = | |
464 | (struct rtnexthop *)RTA_DATA(tb[RTA_MULTIPATH]); | |
465 | ||
466 | len = RTA_PAYLOAD(tb[RTA_MULTIPATH]); | |
467 | ||
468 | re = XCALLOC(MTYPE_RE, sizeof(struct route_entry)); | |
915902cb | 469 | re->type = proto; |
25715c7e | 470 | re->distance = distance; |
d62a17ae | 471 | re->flags = flags; |
472 | re->metric = metric; | |
473 | re->mtu = mtu; | |
474 | re->vrf_id = vrf_id; | |
475 | re->table = table; | |
476 | re->nexthop_num = 0; | |
477 | re->uptime = time(NULL); | |
4e40b6d6 | 478 | re->tag = tag; |
d62a17ae | 479 | |
480 | for (;;) { | |
4a7371e9 | 481 | vrf_id_t nh_vrf_id; |
d62a17ae | 482 | if (len < (int)sizeof(*rtnh) |
483 | || rtnh->rtnh_len > len) | |
484 | break; | |
485 | ||
486 | index = rtnh->rtnh_ifindex; | |
8795f904 DS |
487 | if (index) { |
488 | /* | |
489 | * Yes we are looking this up | |
490 | * for every nexthop and just | |
491 | * using the last one looked | |
492 | * up right now | |
493 | */ | |
494 | ifp = if_lookup_by_index(index, | |
495 | VRF_UNKNOWN); | |
496 | if (ifp) | |
4a7371e9 DS |
497 | nh_vrf_id = ifp->vrf_id; |
498 | else { | |
499 | zlog_warn( | |
500 | "%s: Unknown interface %u specified, defaulting to VRF_DEFAULT", | |
501 | __PRETTY_FUNCTION__, | |
502 | index); | |
503 | nh_vrf_id = VRF_DEFAULT; | |
504 | } | |
505 | } else | |
506 | nh_vrf_id = vrf_id; | |
507 | ||
d62a17ae | 508 | gate = 0; |
509 | if (rtnh->rtnh_len > sizeof(*rtnh)) { | |
510 | memset(tb, 0, sizeof(tb)); | |
511 | netlink_parse_rtattr( | |
512 | tb, RTA_MAX, RTNH_DATA(rtnh), | |
513 | rtnh->rtnh_len - sizeof(*rtnh)); | |
514 | if (tb[RTA_GATEWAY]) | |
515 | gate = RTA_DATA( | |
516 | tb[RTA_GATEWAY]); | |
517 | } | |
518 | ||
519 | if (gate) { | |
520 | if (rtm->rtm_family == AF_INET) { | |
521 | if (index) | |
522 | route_entry_nexthop_ipv4_ifindex_add( | |
523 | re, gate, | |
4a7371e9 DS |
524 | prefsrc, index, |
525 | nh_vrf_id); | |
d62a17ae | 526 | else |
527 | route_entry_nexthop_ipv4_add( | |
528 | re, gate, | |
4a7371e9 DS |
529 | prefsrc, |
530 | nh_vrf_id); | |
d62a17ae | 531 | } else if (rtm->rtm_family |
532 | == AF_INET6) { | |
533 | if (index) | |
534 | route_entry_nexthop_ipv6_ifindex_add( | |
4a7371e9 DS |
535 | re, gate, index, |
536 | nh_vrf_id); | |
d62a17ae | 537 | else |
538 | route_entry_nexthop_ipv6_add( | |
4a7371e9 DS |
539 | re, gate, |
540 | nh_vrf_id); | |
d62a17ae | 541 | } |
542 | } else | |
4a7371e9 DS |
543 | route_entry_nexthop_ifindex_add( |
544 | re, index, nh_vrf_id); | |
d62a17ae | 545 | |
546 | len -= NLMSG_ALIGN(rtnh->rtnh_len); | |
547 | rtnh = RTNH_NEXT(rtnh); | |
548 | } | |
549 | ||
550 | zserv_nexthop_num_warn(__func__, | |
551 | (const struct prefix *)&p, | |
552 | re->nexthop_num); | |
553 | if (re->nexthop_num == 0) | |
554 | XFREE(MTYPE_RE, re); | |
555 | else | |
996c9314 LB |
556 | rib_add_multipath(afi, SAFI_UNICAST, &p, NULL, |
557 | re); | |
d62a17ae | 558 | } |
559 | } else { | |
fd36be7e DL |
560 | if (!tb[RTA_MULTIPATH]) { |
561 | struct nexthop nh; | |
562 | size_t sz = (afi == AFI_IP) ? 4 : 16; | |
563 | ||
564 | memset(&nh, 0, sizeof(nh)); | |
8ba5bd58 RW |
565 | if (bh_type == BLACKHOLE_UNSPEC) { |
566 | if (index && !gate) | |
567 | nh.type = NEXTHOP_TYPE_IFINDEX; | |
568 | else if (index && gate) | |
569 | nh.type = | |
570 | (afi == AFI_IP) | |
571 | ? NEXTHOP_TYPE_IPV4_IFINDEX | |
572 | : NEXTHOP_TYPE_IPV6_IFINDEX; | |
573 | else if (!index && gate) | |
574 | nh.type = (afi == AFI_IP) | |
575 | ? NEXTHOP_TYPE_IPV4 | |
60466a63 | 576 | : NEXTHOP_TYPE_IPV6; |
8ba5bd58 RW |
577 | else { |
578 | nh.type = NEXTHOP_TYPE_BLACKHOLE; | |
579 | nh.bh_type = BLACKHOLE_UNSPEC; | |
580 | } | |
581 | } else { | |
fd36be7e | 582 | nh.type = NEXTHOP_TYPE_BLACKHOLE; |
8ba5bd58 RW |
583 | nh.bh_type = bh_type; |
584 | } | |
fd36be7e DL |
585 | nh.ifindex = index; |
586 | if (gate) | |
587 | memcpy(&nh.gate, gate, sz); | |
996c9314 LB |
588 | rib_delete(afi, SAFI_UNICAST, vrf_id, proto, 0, flags, |
589 | &p, NULL, &nh, table, metric, true, NULL); | |
fd36be7e DL |
590 | } else { |
591 | /* XXX: need to compare the entire list of nexthops | |
592 | * here for NLM_F_APPEND stupidity */ | |
996c9314 LB |
593 | rib_delete(afi, SAFI_UNICAST, vrf_id, proto, 0, flags, |
594 | &p, NULL, NULL, table, metric, true, NULL); | |
d62a17ae | 595 | } |
596 | } | |
597 | ||
598 | return 0; | |
718e3744 | 599 | } |
600 | ||
e3be0432 DS |
601 | static struct mcast_route_data *mroute = NULL; |
602 | ||
d62a17ae | 603 | static int netlink_route_change_read_multicast(struct sockaddr_nl *snl, |
604 | struct nlmsghdr *h, | |
605 | ns_id_t ns_id, int startup) | |
565fdc75 | 606 | { |
d62a17ae | 607 | int len; |
608 | struct rtmsg *rtm; | |
609 | struct rtattr *tb[RTA_MAX + 1]; | |
610 | struct mcast_route_data *m; | |
611 | struct mcast_route_data mr; | |
612 | int iif = 0; | |
613 | int count; | |
614 | int oif[256]; | |
615 | int oif_count = 0; | |
616 | char sbuf[40]; | |
617 | char gbuf[40]; | |
618 | char oif_list[256] = "\0"; | |
78dd30b2 | 619 | vrf_id_t vrf; |
43b5cc5e | 620 | int table; |
d62a17ae | 621 | |
622 | if (mroute) | |
623 | m = mroute; | |
624 | else { | |
625 | memset(&mr, 0, sizeof(mr)); | |
626 | m = &mr; | |
627 | } | |
628 | ||
629 | rtm = NLMSG_DATA(h); | |
630 | ||
631 | len = h->nlmsg_len - NLMSG_LENGTH(sizeof(struct rtmsg)); | |
632 | ||
633 | memset(tb, 0, sizeof tb); | |
634 | netlink_parse_rtattr(tb, RTA_MAX, RTM_RTA(rtm), len); | |
90d82769 | 635 | |
43b5cc5e DS |
636 | if (tb[RTA_TABLE]) |
637 | table = *(int *)RTA_DATA(tb[RTA_TABLE]); | |
638 | else | |
639 | table = rtm->rtm_table; | |
640 | ||
78dd30b2 | 641 | vrf = vrf_lookup_by_table(table, ns_id); |
43b5cc5e | 642 | |
d62a17ae | 643 | if (tb[RTA_IIF]) |
644 | iif = *(int *)RTA_DATA(tb[RTA_IIF]); | |
645 | ||
646 | if (tb[RTA_SRC]) | |
bd8b9272 | 647 | m->sg.src = *(struct in_addr *)RTA_DATA(tb[RTA_SRC]); |
d62a17ae | 648 | |
649 | if (tb[RTA_DST]) | |
bd8b9272 | 650 | m->sg.grp = *(struct in_addr *)RTA_DATA(tb[RTA_DST]); |
d62a17ae | 651 | |
652 | if ((RTA_EXPIRES <= RTA_MAX) && tb[RTA_EXPIRES]) | |
653 | m->lastused = *(unsigned long long *)RTA_DATA(tb[RTA_EXPIRES]); | |
654 | ||
655 | if (tb[RTA_MULTIPATH]) { | |
656 | struct rtnexthop *rtnh = | |
657 | (struct rtnexthop *)RTA_DATA(tb[RTA_MULTIPATH]); | |
658 | ||
659 | len = RTA_PAYLOAD(tb[RTA_MULTIPATH]); | |
660 | for (;;) { | |
661 | if (len < (int)sizeof(*rtnh) || rtnh->rtnh_len > len) | |
662 | break; | |
663 | ||
664 | oif[oif_count] = rtnh->rtnh_ifindex; | |
665 | oif_count++; | |
666 | ||
667 | len -= NLMSG_ALIGN(rtnh->rtnh_len); | |
668 | rtnh = RTNH_NEXT(rtnh); | |
669 | } | |
670 | } | |
671 | ||
672 | if (IS_ZEBRA_DEBUG_KERNEL) { | |
673 | struct interface *ifp; | |
0af35d90 RW |
674 | strlcpy(sbuf, inet_ntoa(m->sg.src), sizeof(sbuf)); |
675 | strlcpy(gbuf, inet_ntoa(m->sg.grp), sizeof(gbuf)); | |
d62a17ae | 676 | for (count = 0; count < oif_count; count++) { |
677 | ifp = if_lookup_by_index(oif[count], vrf); | |
678 | char temp[256]; | |
679 | ||
680 | sprintf(temp, "%s ", ifp->name); | |
681 | strcat(oif_list, temp); | |
682 | } | |
43b5cc5e | 683 | struct zebra_vrf *zvrf = zebra_vrf_lookup_by_id(vrf); |
d62a17ae | 684 | ifp = if_lookup_by_index(iif, vrf); |
43b5cc5e DS |
685 | zlog_debug( |
686 | "MCAST VRF: %s(%d) %s (%s,%s) IIF: %s OIF: %s jiffies: %lld", | |
687 | zvrf->vrf->name, vrf, nl_msg_type_to_str(h->nlmsg_type), | |
688 | sbuf, gbuf, ifp->name, oif_list, m->lastused); | |
90d82769 | 689 | } |
d62a17ae | 690 | return 0; |
565fdc75 DS |
691 | } |
692 | ||
d62a17ae | 693 | int netlink_route_change(struct sockaddr_nl *snl, struct nlmsghdr *h, |
694 | ns_id_t ns_id, int startup) | |
565fdc75 | 695 | { |
d62a17ae | 696 | int len; |
d62a17ae | 697 | struct rtmsg *rtm; |
698 | ||
699 | rtm = NLMSG_DATA(h); | |
700 | ||
701 | if (!(h->nlmsg_type == RTM_NEWROUTE || h->nlmsg_type == RTM_DELROUTE)) { | |
702 | /* If this is not route add/delete message print warning. */ | |
78dd30b2 | 703 | zlog_warn("Kernel message: %d NS %u\n", h->nlmsg_type, ns_id); |
d62a17ae | 704 | return 0; |
705 | } | |
706 | ||
707 | /* Connected route. */ | |
708 | if (IS_ZEBRA_DEBUG_KERNEL) | |
78dd30b2 | 709 | zlog_debug("%s %s %s proto %s NS %u", |
d62a17ae | 710 | nl_msg_type_to_str(h->nlmsg_type), |
711 | nl_family_to_str(rtm->rtm_family), | |
712 | nl_rttype_to_str(rtm->rtm_type), | |
78dd30b2 | 713 | nl_rtproto_to_str(rtm->rtm_protocol), ns_id); |
d62a17ae | 714 | |
715 | /* We don't care about change notifications for the MPLS table. */ | |
716 | /* TODO: Revisit this. */ | |
717 | if (rtm->rtm_family == AF_MPLS) | |
718 | return 0; | |
719 | ||
720 | len = h->nlmsg_len - NLMSG_LENGTH(sizeof(struct rtmsg)); | |
721 | if (len < 0) | |
722 | return -1; | |
723 | ||
e655a03c | 724 | if (rtm->rtm_type == RTN_MULTICAST) |
d62a17ae | 725 | netlink_route_change_read_multicast(snl, h, ns_id, startup); |
e655a03c DL |
726 | else |
727 | netlink_route_change_read_unicast(snl, h, ns_id, startup); | |
d62a17ae | 728 | return 0; |
565fdc75 DS |
729 | } |
730 | ||
289602d7 | 731 | /* Request for specific route information from the kernel */ |
d62a17ae | 732 | static int netlink_request_route(struct zebra_ns *zns, int family, int type) |
289602d7 | 733 | { |
d62a17ae | 734 | struct { |
735 | struct nlmsghdr n; | |
736 | struct rtmsg rtm; | |
737 | } req; | |
738 | ||
739 | /* Form the request, specifying filter (rtattr) if needed. */ | |
740 | memset(&req, 0, sizeof(req)); | |
741 | req.n.nlmsg_type = type; | |
742 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)); | |
743 | req.rtm.rtm_family = family; | |
744 | ||
745 | return netlink_request(&zns->netlink_cmd, &req.n); | |
289602d7 | 746 | } |
747 | ||
718e3744 | 748 | /* Routing table read function using netlink interface. Only called |
749 | bootstrap time. */ | |
d62a17ae | 750 | int netlink_route_read(struct zebra_ns *zns) |
718e3744 | 751 | { |
d62a17ae | 752 | int ret; |
753 | ||
754 | /* Get IPv4 routing table. */ | |
755 | ret = netlink_request_route(zns, AF_INET, RTM_GETROUTE); | |
756 | if (ret < 0) | |
757 | return ret; | |
758 | ret = netlink_parse_info(netlink_route_change_read_unicast, | |
759 | &zns->netlink_cmd, zns, 0, 1); | |
760 | if (ret < 0) | |
761 | return ret; | |
762 | ||
763 | /* Get IPv6 routing table. */ | |
764 | ret = netlink_request_route(zns, AF_INET6, RTM_GETROUTE); | |
765 | if (ret < 0) | |
766 | return ret; | |
767 | ret = netlink_parse_info(netlink_route_change_read_unicast, | |
768 | &zns->netlink_cmd, zns, 0, 1); | |
769 | if (ret < 0) | |
770 | return ret; | |
771 | ||
772 | return 0; | |
718e3744 | 773 | } |
774 | ||
d7c0a89a QY |
775 | static void _netlink_route_nl_add_gateway_info(uint8_t route_family, |
776 | uint8_t gw_family, | |
d62a17ae | 777 | struct nlmsghdr *nlmsg, |
778 | size_t req_size, int bytelen, | |
779 | struct nexthop *nexthop) | |
40c7bdb0 | 780 | { |
d62a17ae | 781 | if (route_family == AF_MPLS) { |
782 | struct gw_family_t gw_fam; | |
783 | ||
784 | gw_fam.family = gw_family; | |
785 | if (gw_family == AF_INET) | |
786 | memcpy(&gw_fam.gate.ipv4, &nexthop->gate.ipv4, bytelen); | |
787 | else | |
788 | memcpy(&gw_fam.gate.ipv6, &nexthop->gate.ipv6, bytelen); | |
789 | addattr_l(nlmsg, req_size, RTA_VIA, &gw_fam.family, | |
790 | bytelen + 2); | |
791 | } else { | |
792 | if (gw_family == AF_INET) | |
793 | addattr_l(nlmsg, req_size, RTA_GATEWAY, | |
794 | &nexthop->gate.ipv4, bytelen); | |
795 | else | |
796 | addattr_l(nlmsg, req_size, RTA_GATEWAY, | |
797 | &nexthop->gate.ipv6, bytelen); | |
798 | } | |
40c7bdb0 | 799 | } |
800 | ||
d7c0a89a QY |
801 | static void _netlink_route_rta_add_gateway_info(uint8_t route_family, |
802 | uint8_t gw_family, | |
d62a17ae | 803 | struct rtattr *rta, |
804 | struct rtnexthop *rtnh, | |
805 | size_t req_size, int bytelen, | |
806 | struct nexthop *nexthop) | |
40c7bdb0 | 807 | { |
d62a17ae | 808 | if (route_family == AF_MPLS) { |
809 | struct gw_family_t gw_fam; | |
810 | ||
811 | gw_fam.family = gw_family; | |
812 | if (gw_family == AF_INET) | |
813 | memcpy(&gw_fam.gate.ipv4, &nexthop->gate.ipv4, bytelen); | |
814 | else | |
815 | memcpy(&gw_fam.gate.ipv6, &nexthop->gate.ipv6, bytelen); | |
816 | rta_addattr_l(rta, req_size, RTA_VIA, &gw_fam.family, | |
817 | bytelen + 2); | |
818 | rtnh->rtnh_len += RTA_LENGTH(bytelen + 2); | |
819 | } else { | |
820 | if (gw_family == AF_INET) | |
821 | rta_addattr_l(rta, req_size, RTA_GATEWAY, | |
822 | &nexthop->gate.ipv4, bytelen); | |
823 | else | |
824 | rta_addattr_l(rta, req_size, RTA_GATEWAY, | |
825 | &nexthop->gate.ipv6, bytelen); | |
826 | rtnh->rtnh_len += sizeof(struct rtattr) + bytelen; | |
827 | } | |
40c7bdb0 | 828 | } |
829 | ||
fa713d9e CF |
830 | /* This function takes a nexthop as argument and adds |
831 | * the appropriate netlink attributes to an existing | |
832 | * netlink message. | |
833 | * | |
834 | * @param routedesc: Human readable description of route type | |
835 | * (direct/recursive, single-/multipath) | |
836 | * @param bytelen: Length of addresses in bytes. | |
837 | * @param nexthop: Nexthop information | |
838 | * @param nlmsg: nlmsghdr structure to fill in. | |
839 | * @param req_size: The size allocated for the message. | |
840 | */ | |
d62a17ae | 841 | static void _netlink_route_build_singlepath(const char *routedesc, int bytelen, |
842 | struct nexthop *nexthop, | |
843 | struct nlmsghdr *nlmsg, | |
844 | struct rtmsg *rtmsg, | |
845 | size_t req_size, int cmd) | |
fa713d9e | 846 | { |
8ecdb26e | 847 | struct mpls_label_stack *nh_label; |
d62a17ae | 848 | mpls_lse_t out_lse[MPLS_MAX_LABELS]; |
fa712963 | 849 | int num_labels = 0; |
9a62e84b | 850 | char label_buf[256]; |
d62a17ae | 851 | |
852 | /* | |
853 | * label_buf is *only* currently used within debugging. | |
854 | * As such when we assign it we are guarding it inside | |
855 | * a debug test. If you want to change this make sure | |
856 | * you fix this assumption | |
857 | */ | |
858 | label_buf[0] = '\0'; | |
d62a17ae | 859 | |
fa712963 RW |
860 | assert(nexthop); |
861 | for (struct nexthop *nh = nexthop; nh; nh = nh->rparent) { | |
d62a17ae | 862 | char label_buf1[20]; |
863 | ||
fa712963 RW |
864 | nh_label = nh->nh_label; |
865 | if (!nh_label || !nh_label->num_labels) | |
866 | continue; | |
867 | ||
868 | for (int i = 0; i < nh_label->num_labels; i++) { | |
869 | if (nh_label->label[i] == MPLS_LABEL_IMPLICIT_NULL) | |
870 | continue; | |
871 | ||
872 | if (IS_ZEBRA_DEBUG_KERNEL) { | |
873 | if (!num_labels) | |
874 | sprintf(label_buf, "label %u", | |
875 | nh_label->label[i]); | |
876 | else { | |
877 | sprintf(label_buf1, "/%u", | |
878 | nh_label->label[i]); | |
879 | strlcat(label_buf, label_buf1, | |
880 | sizeof(label_buf)); | |
d62a17ae | 881 | } |
d62a17ae | 882 | } |
fa712963 RW |
883 | |
884 | out_lse[num_labels] = | |
885 | mpls_lse_encode(nh_label->label[i], 0, 0, 0); | |
886 | num_labels++; | |
d62a17ae | 887 | } |
fa712963 RW |
888 | } |
889 | ||
890 | if (num_labels) { | |
891 | /* Set the BoS bit */ | |
892 | out_lse[num_labels - 1] |= htonl(1 << MPLS_LS_S_SHIFT); | |
893 | ||
894 | if (rtmsg->rtm_family == AF_MPLS) | |
895 | addattr_l(nlmsg, req_size, RTA_NEWDST, &out_lse, | |
896 | num_labels * sizeof(mpls_lse_t)); | |
897 | else { | |
898 | struct rtattr *nest; | |
d7c0a89a | 899 | uint16_t encap = LWTUNNEL_ENCAP_MPLS; |
fa712963 RW |
900 | |
901 | addattr_l(nlmsg, req_size, RTA_ENCAP_TYPE, &encap, | |
d7c0a89a | 902 | sizeof(uint16_t)); |
fa712963 RW |
903 | nest = addattr_nest(nlmsg, req_size, RTA_ENCAP); |
904 | addattr_l(nlmsg, req_size, MPLS_IPTUNNEL_DST, &out_lse, | |
905 | num_labels * sizeof(mpls_lse_t)); | |
906 | addattr_nest_end(nlmsg, nest); | |
66d42727 | 907 | } |
0aabccc0 | 908 | } |
fa713d9e | 909 | |
d62a17ae | 910 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ONLINK)) |
911 | rtmsg->rtm_flags |= RTNH_F_ONLINK; | |
912 | ||
913 | if (rtmsg->rtm_family == AF_INET | |
914 | && (nexthop->type == NEXTHOP_TYPE_IPV6 | |
915 | || nexthop->type == NEXTHOP_TYPE_IPV6_IFINDEX)) { | |
916 | rtmsg->rtm_flags |= RTNH_F_ONLINK; | |
917 | addattr_l(nlmsg, req_size, RTA_GATEWAY, &ipv4_ll, 4); | |
918 | addattr32(nlmsg, req_size, RTA_OIF, nexthop->ifindex); | |
919 | ||
920 | if (nexthop->rmap_src.ipv4.s_addr && (cmd == RTM_NEWROUTE)) | |
921 | addattr_l(nlmsg, req_size, RTA_PREFSRC, | |
922 | &nexthop->rmap_src.ipv4, bytelen); | |
923 | else if (nexthop->src.ipv4.s_addr && (cmd == RTM_NEWROUTE)) | |
924 | addattr_l(nlmsg, req_size, RTA_PREFSRC, | |
925 | &nexthop->src.ipv4, bytelen); | |
926 | ||
927 | if (IS_ZEBRA_DEBUG_KERNEL) | |
928 | zlog_debug( | |
929 | " 5549: _netlink_route_build_singlepath() (%s): " | |
7556c3fd | 930 | "nexthop via %s %s if %u(%u)", |
d62a17ae | 931 | routedesc, ipv4_ll_buf, label_buf, |
7556c3fd | 932 | nexthop->ifindex, nexthop->vrf_id); |
d62a17ae | 933 | return; |
0aabccc0 DD |
934 | } |
935 | ||
d62a17ae | 936 | if (nexthop->type == NEXTHOP_TYPE_IPV4 |
937 | || nexthop->type == NEXTHOP_TYPE_IPV4_IFINDEX) { | |
938 | /* Send deletes to the kernel without specifying the next-hop */ | |
939 | if (cmd != RTM_DELROUTE) | |
940 | _netlink_route_nl_add_gateway_info( | |
941 | rtmsg->rtm_family, AF_INET, nlmsg, req_size, | |
942 | bytelen, nexthop); | |
943 | ||
944 | if (cmd == RTM_NEWROUTE) { | |
945 | if (nexthop->rmap_src.ipv4.s_addr) | |
946 | addattr_l(nlmsg, req_size, RTA_PREFSRC, | |
947 | &nexthop->rmap_src.ipv4, bytelen); | |
948 | else if (nexthop->src.ipv4.s_addr) | |
949 | addattr_l(nlmsg, req_size, RTA_PREFSRC, | |
950 | &nexthop->src.ipv4, bytelen); | |
951 | } | |
952 | ||
953 | if (IS_ZEBRA_DEBUG_KERNEL) | |
954 | zlog_debug( | |
955 | "netlink_route_multipath() (%s): " | |
7556c3fd | 956 | "nexthop via %s %s if %u(%u)", |
d62a17ae | 957 | routedesc, inet_ntoa(nexthop->gate.ipv4), |
7556c3fd | 958 | label_buf, nexthop->ifindex, nexthop->vrf_id); |
0aabccc0 | 959 | } |
fa713d9e | 960 | |
d62a17ae | 961 | if (nexthop->type == NEXTHOP_TYPE_IPV6 |
962 | || nexthop->type == NEXTHOP_TYPE_IPV6_IFINDEX) { | |
963 | _netlink_route_nl_add_gateway_info(rtmsg->rtm_family, AF_INET6, | |
964 | nlmsg, req_size, bytelen, | |
965 | nexthop); | |
966 | ||
967 | if (cmd == RTM_NEWROUTE) { | |
968 | if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->rmap_src.ipv6)) | |
969 | addattr_l(nlmsg, req_size, RTA_PREFSRC, | |
970 | &nexthop->rmap_src.ipv6, bytelen); | |
971 | else if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->src.ipv6)) | |
972 | addattr_l(nlmsg, req_size, RTA_PREFSRC, | |
973 | &nexthop->src.ipv6, bytelen); | |
974 | } | |
fa713d9e | 975 | |
d62a17ae | 976 | if (IS_ZEBRA_DEBUG_KERNEL) |
977 | zlog_debug( | |
978 | "netlink_route_multipath() (%s): " | |
7556c3fd | 979 | "nexthop via %s %s if %u(%u)", |
d62a17ae | 980 | routedesc, inet6_ntoa(nexthop->gate.ipv6), |
7556c3fd | 981 | label_buf, nexthop->ifindex, nexthop->vrf_id); |
d62a17ae | 982 | } |
5e210522 DS |
983 | |
984 | /* | |
985 | * We have the ifindex so we should always send it | |
986 | * This is especially useful if we are doing route | |
987 | * leaking. | |
988 | */ | |
989 | if (nexthop->type != NEXTHOP_TYPE_BLACKHOLE) | |
d62a17ae | 990 | addattr32(nlmsg, req_size, RTA_OIF, nexthop->ifindex); |
991 | ||
5e210522 DS |
992 | if (nexthop->type == NEXTHOP_TYPE_IFINDEX |
993 | || nexthop->type == NEXTHOP_TYPE_IPV4_IFINDEX) { | |
d62a17ae | 994 | if (cmd == RTM_NEWROUTE) { |
995 | if (nexthop->rmap_src.ipv4.s_addr) | |
996 | addattr_l(nlmsg, req_size, RTA_PREFSRC, | |
997 | &nexthop->rmap_src.ipv4, bytelen); | |
998 | else if (nexthop->src.ipv4.s_addr) | |
999 | addattr_l(nlmsg, req_size, RTA_PREFSRC, | |
1000 | &nexthop->src.ipv4, bytelen); | |
1001 | } | |
fa713d9e | 1002 | |
d62a17ae | 1003 | if (IS_ZEBRA_DEBUG_KERNEL) |
1004 | zlog_debug( | |
1005 | "netlink_route_multipath() (%s): " | |
7556c3fd DS |
1006 | "nexthop via if %u(%u)", |
1007 | routedesc, nexthop->ifindex, nexthop->vrf_id); | |
0aabccc0 DD |
1008 | } |
1009 | ||
d62a17ae | 1010 | if (nexthop->type == NEXTHOP_TYPE_IPV6_IFINDEX) { |
d62a17ae | 1011 | if (cmd == RTM_NEWROUTE) { |
1012 | if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->rmap_src.ipv6)) | |
1013 | addattr_l(nlmsg, req_size, RTA_PREFSRC, | |
1014 | &nexthop->rmap_src.ipv6, bytelen); | |
1015 | else if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->src.ipv6)) | |
1016 | addattr_l(nlmsg, req_size, RTA_PREFSRC, | |
1017 | &nexthop->src.ipv6, bytelen); | |
1018 | } | |
1019 | ||
1020 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1021 | zlog_debug( | |
1022 | "netlink_route_multipath() (%s): " | |
7556c3fd DS |
1023 | "nexthop via if %u(%u)", |
1024 | routedesc, nexthop->ifindex, nexthop->vrf_id); | |
d62a17ae | 1025 | } |
fa713d9e CF |
1026 | } |
1027 | ||
1028 | /* This function takes a nexthop as argument and | |
1029 | * appends to the given rtattr/rtnexthop pair the | |
1030 | * representation of the nexthop. If the nexthop | |
1031 | * defines a preferred source, the src parameter | |
1032 | * will be modified to point to that src, otherwise | |
1033 | * it will be kept unmodified. | |
1034 | * | |
1035 | * @param routedesc: Human readable description of route type | |
1036 | * (direct/recursive, single-/multipath) | |
1037 | * @param bytelen: Length of addresses in bytes. | |
1038 | * @param nexthop: Nexthop information | |
1039 | * @param rta: rtnetlink attribute structure | |
1040 | * @param rtnh: pointer to an rtnetlink nexthop structure | |
1041 | * @param src: pointer pointing to a location where | |
1042 | * the prefsrc should be stored. | |
1043 | */ | |
d62a17ae | 1044 | static void _netlink_route_build_multipath(const char *routedesc, int bytelen, |
1045 | struct nexthop *nexthop, | |
1046 | struct rtattr *rta, | |
1047 | struct rtnexthop *rtnh, | |
1048 | struct rtmsg *rtmsg, | |
1049 | union g_addr **src) | |
fa713d9e | 1050 | { |
8ecdb26e | 1051 | struct mpls_label_stack *nh_label; |
d62a17ae | 1052 | mpls_lse_t out_lse[MPLS_MAX_LABELS]; |
fa712963 | 1053 | int num_labels = 0; |
9a62e84b | 1054 | char label_buf[256]; |
d62a17ae | 1055 | |
1056 | rtnh->rtnh_len = sizeof(*rtnh); | |
1057 | rtnh->rtnh_flags = 0; | |
1058 | rtnh->rtnh_hops = 0; | |
1059 | rta->rta_len += rtnh->rtnh_len; | |
1060 | ||
1061 | /* | |
1062 | * label_buf is *only* currently used within debugging. | |
1063 | * As such when we assign it we are guarding it inside | |
1064 | * a debug test. If you want to change this make sure | |
1065 | * you fix this assumption | |
1066 | */ | |
1067 | label_buf[0] = '\0'; | |
d62a17ae | 1068 | |
fa712963 RW |
1069 | assert(nexthop); |
1070 | for (struct nexthop *nh = nexthop; nh; nh = nh->rparent) { | |
d62a17ae | 1071 | char label_buf1[20]; |
1072 | ||
fa712963 RW |
1073 | nh_label = nh->nh_label; |
1074 | if (!nh_label || !nh_label->num_labels) | |
1075 | continue; | |
1076 | ||
1077 | for (int i = 0; i < nh_label->num_labels; i++) { | |
1078 | if (nh_label->label[i] == MPLS_LABEL_IMPLICIT_NULL) | |
1079 | continue; | |
1080 | ||
1081 | if (IS_ZEBRA_DEBUG_KERNEL) { | |
1082 | if (!num_labels) | |
1083 | sprintf(label_buf, "label %u", | |
1084 | nh_label->label[i]); | |
1085 | else { | |
1086 | sprintf(label_buf1, "/%u", | |
1087 | nh_label->label[i]); | |
1088 | strlcat(label_buf, label_buf1, | |
1089 | sizeof(label_buf)); | |
d62a17ae | 1090 | } |
d62a17ae | 1091 | } |
fa712963 RW |
1092 | |
1093 | out_lse[num_labels] = | |
1094 | mpls_lse_encode(nh_label->label[i], 0, 0, 0); | |
1095 | num_labels++; | |
d62a17ae | 1096 | } |
fa712963 RW |
1097 | } |
1098 | ||
1099 | if (num_labels) { | |
1100 | /* Set the BoS bit */ | |
1101 | out_lse[num_labels - 1] |= htonl(1 << MPLS_LS_S_SHIFT); | |
1102 | ||
1103 | if (rtmsg->rtm_family == AF_MPLS) { | |
1104 | rta_addattr_l(rta, NL_PKT_BUF_SIZE, RTA_NEWDST, | |
1105 | &out_lse, | |
1106 | num_labels * sizeof(mpls_lse_t)); | |
1107 | rtnh->rtnh_len += | |
1108 | RTA_LENGTH(num_labels * sizeof(mpls_lse_t)); | |
1109 | } else { | |
1110 | struct rtattr *nest; | |
d7c0a89a | 1111 | uint16_t encap = LWTUNNEL_ENCAP_MPLS; |
fa712963 RW |
1112 | int len = rta->rta_len; |
1113 | ||
1114 | rta_addattr_l(rta, NL_PKT_BUF_SIZE, RTA_ENCAP_TYPE, | |
d7c0a89a | 1115 | &encap, sizeof(uint16_t)); |
fa712963 RW |
1116 | nest = rta_nest(rta, NL_PKT_BUF_SIZE, RTA_ENCAP); |
1117 | rta_addattr_l(rta, NL_PKT_BUF_SIZE, MPLS_IPTUNNEL_DST, | |
1118 | &out_lse, | |
1119 | num_labels * sizeof(mpls_lse_t)); | |
1120 | rta_nest_end(rta, nest); | |
1121 | rtnh->rtnh_len += rta->rta_len - len; | |
66d42727 | 1122 | } |
d62a17ae | 1123 | } |
1124 | ||
1125 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ONLINK)) | |
1126 | rtnh->rtnh_flags |= RTNH_F_ONLINK; | |
1127 | ||
1128 | if (rtmsg->rtm_family == AF_INET | |
1129 | && (nexthop->type == NEXTHOP_TYPE_IPV6 | |
1130 | || nexthop->type == NEXTHOP_TYPE_IPV6_IFINDEX)) { | |
1131 | bytelen = 4; | |
1132 | rtnh->rtnh_flags |= RTNH_F_ONLINK; | |
1133 | rta_addattr_l(rta, NL_PKT_BUF_SIZE, RTA_GATEWAY, &ipv4_ll, | |
1134 | bytelen); | |
1135 | rtnh->rtnh_len += sizeof(struct rtattr) + bytelen; | |
1136 | rtnh->rtnh_ifindex = nexthop->ifindex; | |
1137 | ||
1138 | if (nexthop->rmap_src.ipv4.s_addr) | |
1139 | *src = &nexthop->rmap_src; | |
1140 | else if (nexthop->src.ipv4.s_addr) | |
1141 | *src = &nexthop->src; | |
1142 | ||
1143 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1144 | zlog_debug( | |
1145 | " 5549: netlink_route_build_multipath() (%s): " | |
1146 | "nexthop via %s %s if %u", | |
1147 | routedesc, ipv4_ll_buf, label_buf, | |
1148 | nexthop->ifindex); | |
1149 | return; | |
1150 | } | |
1151 | ||
1152 | if (nexthop->type == NEXTHOP_TYPE_IPV4 | |
1153 | || nexthop->type == NEXTHOP_TYPE_IPV4_IFINDEX) { | |
1154 | _netlink_route_rta_add_gateway_info(rtmsg->rtm_family, AF_INET, | |
1155 | rta, rtnh, NL_PKT_BUF_SIZE, | |
1156 | bytelen, nexthop); | |
1157 | if (nexthop->rmap_src.ipv4.s_addr) | |
1158 | *src = &nexthop->rmap_src; | |
1159 | else if (nexthop->src.ipv4.s_addr) | |
1160 | *src = &nexthop->src; | |
1161 | ||
1162 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1163 | zlog_debug( | |
1164 | "netlink_route_multipath() (%s): " | |
1165 | "nexthop via %s %s if %u", | |
1166 | routedesc, inet_ntoa(nexthop->gate.ipv4), | |
1167 | label_buf, nexthop->ifindex); | |
1168 | } | |
1169 | if (nexthop->type == NEXTHOP_TYPE_IPV6 | |
1170 | || nexthop->type == NEXTHOP_TYPE_IPV6_IFINDEX) { | |
1171 | _netlink_route_rta_add_gateway_info(rtmsg->rtm_family, AF_INET6, | |
1172 | rta, rtnh, NL_PKT_BUF_SIZE, | |
1173 | bytelen, nexthop); | |
1174 | ||
1175 | if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->rmap_src.ipv6)) | |
1176 | *src = &nexthop->rmap_src; | |
1177 | else if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->src.ipv6)) | |
1178 | *src = &nexthop->src; | |
1179 | ||
1180 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1181 | zlog_debug( | |
1182 | "netlink_route_multipath() (%s): " | |
1183 | "nexthop via %s %s if %u", | |
1184 | routedesc, inet6_ntoa(nexthop->gate.ipv6), | |
1185 | label_buf, nexthop->ifindex); | |
1186 | } | |
5e210522 DS |
1187 | |
1188 | /* | |
1189 | * We have figured out the ifindex so we should always send it | |
1190 | * This is especially useful if we are doing route | |
1191 | * leaking. | |
1192 | */ | |
1193 | if (nexthop->type != NEXTHOP_TYPE_BLACKHOLE) | |
1194 | rtnh->rtnh_ifindex = nexthop->ifindex; | |
1195 | ||
d62a17ae | 1196 | /* ifindex */ |
1197 | if (nexthop->type == NEXTHOP_TYPE_IPV4_IFINDEX | |
1198 | || nexthop->type == NEXTHOP_TYPE_IFINDEX) { | |
d62a17ae | 1199 | if (nexthop->rmap_src.ipv4.s_addr) |
1200 | *src = &nexthop->rmap_src; | |
1201 | else if (nexthop->src.ipv4.s_addr) | |
1202 | *src = &nexthop->src; | |
1203 | ||
1204 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1205 | zlog_debug( | |
1206 | "netlink_route_multipath() (%s): " | |
1207 | "nexthop via if %u", | |
1208 | routedesc, nexthop->ifindex); | |
1209 | } else if (nexthop->type == NEXTHOP_TYPE_IPV6_IFINDEX) { | |
d62a17ae | 1210 | if (IS_ZEBRA_DEBUG_KERNEL) |
1211 | zlog_debug( | |
1212 | "netlink_route_multipath() (%s): " | |
1213 | "nexthop via if %u", | |
1214 | routedesc, nexthop->ifindex); | |
1215 | } else { | |
1216 | rtnh->rtnh_ifindex = 0; | |
1217 | } | |
fa713d9e CF |
1218 | } |
1219 | ||
d62a17ae | 1220 | static inline void _netlink_mpls_build_singlepath(const char *routedesc, |
1221 | zebra_nhlfe_t *nhlfe, | |
1222 | struct nlmsghdr *nlmsg, | |
1223 | struct rtmsg *rtmsg, | |
1224 | size_t req_size, int cmd) | |
40c7bdb0 | 1225 | { |
d62a17ae | 1226 | int bytelen; |
d7c0a89a | 1227 | uint8_t family; |
40c7bdb0 | 1228 | |
d62a17ae | 1229 | family = NHLFE_FAMILY(nhlfe); |
1230 | bytelen = (family == AF_INET ? 4 : 16); | |
1231 | _netlink_route_build_singlepath(routedesc, bytelen, nhlfe->nexthop, | |
1232 | nlmsg, rtmsg, req_size, cmd); | |
40c7bdb0 | 1233 | } |
1234 | ||
1235 | ||
1236 | static inline void | |
d62a17ae | 1237 | _netlink_mpls_build_multipath(const char *routedesc, zebra_nhlfe_t *nhlfe, |
1238 | struct rtattr *rta, struct rtnexthop *rtnh, | |
1239 | struct rtmsg *rtmsg, union g_addr **src) | |
40c7bdb0 | 1240 | { |
d62a17ae | 1241 | int bytelen; |
d7c0a89a | 1242 | uint8_t family; |
40c7bdb0 | 1243 | |
d62a17ae | 1244 | family = NHLFE_FAMILY(nhlfe); |
1245 | bytelen = (family == AF_INET ? 4 : 16); | |
1246 | _netlink_route_build_multipath(routedesc, bytelen, nhlfe->nexthop, rta, | |
1247 | rtnh, rtmsg, src); | |
40c7bdb0 | 1248 | } |
1249 | ||
1250 | ||
fa713d9e CF |
1251 | /* Log debug information for netlink_route_multipath |
1252 | * if debug logging is enabled. | |
1253 | * | |
1254 | * @param cmd: Netlink command which is to be processed | |
1255 | * @param p: Prefix for which the change is due | |
fa713d9e | 1256 | * @param family: Address family which the change concerns |
45df4e96 DS |
1257 | * @param zvrf: The vrf we are in |
1258 | * @param tableid: The table we are working on | |
fa713d9e | 1259 | */ |
d62a17ae | 1260 | static void _netlink_route_debug(int cmd, struct prefix *p, |
7556c3fd DS |
1261 | int family, struct zebra_vrf *zvrf, |
1262 | uint32_t tableid) | |
fa713d9e | 1263 | { |
d62a17ae | 1264 | if (IS_ZEBRA_DEBUG_KERNEL) { |
1265 | char buf[PREFIX_STRLEN]; | |
1266 | zlog_debug( | |
45df4e96 DS |
1267 | "netlink_route_multipath(): %s %s vrf %u(%u)", |
1268 | nl_msg_type_to_str(cmd), | |
1269 | prefix2str(p, buf, sizeof(buf)), | |
1270 | zvrf_id(zvrf), tableid); | |
d62a17ae | 1271 | } |
1272 | } | |
1273 | ||
d7c0a89a | 1274 | static void _netlink_mpls_debug(int cmd, uint32_t label, const char *routedesc) |
40c7bdb0 | 1275 | { |
d62a17ae | 1276 | if (IS_ZEBRA_DEBUG_KERNEL) |
1277 | zlog_debug("netlink_mpls_multipath() (%s): %s %u/20", routedesc, | |
1278 | nl_msg_type_to_str(cmd), label); | |
fa713d9e CF |
1279 | } |
1280 | ||
d62a17ae | 1281 | static int netlink_neigh_update(int cmd, int ifindex, uint32_t addr, char *lla, |
5895d33f | 1282 | int llalen, ns_id_t ns_id) |
5c610faf | 1283 | { |
d62a17ae | 1284 | struct { |
1285 | struct nlmsghdr n; | |
1286 | struct ndmsg ndm; | |
1287 | char buf[256]; | |
1288 | } req; | |
5c610faf | 1289 | |
5895d33f | 1290 | struct zebra_ns *zns = zebra_ns_lookup(ns_id); |
8f7d9fc0 | 1291 | |
d62a17ae | 1292 | memset(&req.n, 0, sizeof(req.n)); |
1293 | memset(&req.ndm, 0, sizeof(req.ndm)); | |
5c610faf | 1294 | |
d62a17ae | 1295 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)); |
1296 | req.n.nlmsg_flags = NLM_F_CREATE | NLM_F_REQUEST; | |
1297 | req.n.nlmsg_type = cmd; // RTM_NEWNEIGH or RTM_DELNEIGH | |
1298 | req.n.nlmsg_pid = zns->netlink_cmd.snl.nl_pid; | |
a55ba23f | 1299 | |
d62a17ae | 1300 | req.ndm.ndm_family = AF_INET; |
1301 | req.ndm.ndm_state = NUD_PERMANENT; | |
1302 | req.ndm.ndm_ifindex = ifindex; | |
1303 | req.ndm.ndm_type = RTN_UNICAST; | |
5c610faf | 1304 | |
d62a17ae | 1305 | addattr_l(&req.n, sizeof(req), NDA_DST, &addr, 4); |
1306 | addattr_l(&req.n, sizeof(req), NDA_LLADDR, lla, llalen); | |
5c610faf | 1307 | |
d62a17ae | 1308 | return netlink_talk(netlink_talk_filter, &req.n, &zns->netlink_cmd, zns, |
1309 | 0); | |
5c610faf DS |
1310 | } |
1311 | ||
718e3744 | 1312 | /* Routing table change via netlink interface. */ |
6ae24471 | 1313 | /* Update flag indicates whether this is a "replace" or not. */ |
d62a17ae | 1314 | static int netlink_route_multipath(int cmd, struct prefix *p, |
1315 | struct prefix *src_p, struct route_entry *re, | |
1316 | int update) | |
718e3744 | 1317 | { |
d62a17ae | 1318 | int bytelen; |
1319 | struct sockaddr_nl snl; | |
1320 | struct nexthop *nexthop = NULL; | |
1321 | unsigned int nexthop_num; | |
d62a17ae | 1322 | int family = PREFIX_FAMILY(p); |
1323 | const char *routedesc; | |
1324 | int setsrc = 0; | |
1325 | union g_addr src; | |
1326 | ||
1327 | struct { | |
1328 | struct nlmsghdr n; | |
1329 | struct rtmsg r; | |
1330 | char buf[NL_PKT_BUF_SIZE]; | |
1331 | } req; | |
1332 | ||
9a76375f | 1333 | struct zebra_ns *zns; |
d62a17ae | 1334 | struct zebra_vrf *zvrf = vrf_info_lookup(re->vrf_id); |
1335 | ||
009f8ad5 | 1336 | zns = zvrf->zns; |
d62a17ae | 1337 | memset(&req, 0, sizeof req - NL_PKT_BUF_SIZE); |
1338 | ||
1339 | bytelen = (family == AF_INET ? 4 : 16); | |
1340 | ||
1341 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)); | |
1342 | req.n.nlmsg_flags = NLM_F_CREATE | NLM_F_REQUEST; | |
1343 | if ((cmd == RTM_NEWROUTE) && update) | |
1344 | req.n.nlmsg_flags |= NLM_F_REPLACE; | |
1345 | req.n.nlmsg_type = cmd; | |
1346 | req.n.nlmsg_pid = zns->netlink_cmd.snl.nl_pid; | |
1347 | ||
1348 | req.r.rtm_family = family; | |
1349 | req.r.rtm_dst_len = p->prefixlen; | |
1350 | req.r.rtm_src_len = src_p ? src_p->prefixlen : 0; | |
915902cb | 1351 | req.r.rtm_protocol = zebra2proto(re->type); |
d62a17ae | 1352 | req.r.rtm_scope = RT_SCOPE_UNIVERSE; |
c766824c DS |
1353 | |
1354 | /* | |
1355 | * blackhole routes are not RTN_UNICAST, they are | |
1356 | * RTN_ BLACKHOLE|UNREACHABLE|PROHIBIT | |
1357 | * so setting this value as a RTN_UNICAST would | |
1358 | * cause the route lookup of just the prefix | |
1359 | * to fail. So no need to specify this for | |
1360 | * the RTM_DELROUTE case | |
1361 | */ | |
1362 | if (cmd != RTM_DELROUTE) | |
1363 | req.r.rtm_type = RTN_UNICAST; | |
d62a17ae | 1364 | |
d62a17ae | 1365 | addattr_l(&req.n, sizeof req, RTA_DST, &p->u.prefix, bytelen); |
1366 | if (src_p) | |
1367 | addattr_l(&req.n, sizeof req, RTA_SRC, &src_p->u.prefix, | |
1368 | bytelen); | |
1369 | ||
1370 | /* Metric. */ | |
1371 | /* Hardcode the metric for all routes coming from zebra. Metric isn't | |
1372 | * used | |
1373 | * either by the kernel or by zebra. Its purely for calculating best | |
1374 | * path(s) | |
1375 | * by the routing protocol and for communicating with protocol peers. | |
1376 | */ | |
1377 | addattr32(&req.n, sizeof req, RTA_PRIORITY, NL_DEFAULT_ROUTE_METRIC); | |
4e40b6d6 KK |
1378 | #if defined(SUPPORT_REALMS) |
1379 | if (re->tag > 0 && re->tag <= 255) | |
1380 | addattr32(&req.n, sizeof req, RTA_FLOW, re->tag); | |
1381 | #endif | |
d62a17ae | 1382 | /* Table corresponding to this route. */ |
1383 | if (re->table < 256) | |
1384 | req.r.rtm_table = re->table; | |
1385 | else { | |
1386 | req.r.rtm_table = RT_TABLE_UNSPEC; | |
1387 | addattr32(&req.n, sizeof req, RTA_TABLE, re->table); | |
0aabccc0 | 1388 | } |
718e3744 | 1389 | |
45df4e96 DS |
1390 | _netlink_route_debug(cmd, p, family, zvrf, re->table); |
1391 | ||
c1d63a93 DS |
1392 | /* |
1393 | * If we are not updating the route and we have received | |
1394 | * a route delete, then all we need to fill in is the | |
1395 | * prefix information to tell the kernel to schwack | |
1396 | * it. | |
1397 | */ | |
1398 | if (!update && cmd == RTM_DELROUTE) | |
a8309422 DL |
1399 | goto skip; |
1400 | ||
d62a17ae | 1401 | if (re->mtu || re->nexthop_mtu) { |
1402 | char buf[NL_PKT_BUF_SIZE]; | |
1403 | struct rtattr *rta = (void *)buf; | |
d7c0a89a | 1404 | uint32_t mtu = re->mtu; |
d62a17ae | 1405 | if (!mtu || (re->nexthop_mtu && re->nexthop_mtu < mtu)) |
1406 | mtu = re->nexthop_mtu; | |
1407 | rta->rta_type = RTA_METRICS; | |
1408 | rta->rta_len = RTA_LENGTH(0); | |
1409 | rta_addattr_l(rta, NL_PKT_BUF_SIZE, RTAX_MTU, &mtu, sizeof mtu); | |
1410 | addattr_l(&req.n, NL_PKT_BUF_SIZE, RTA_METRICS, RTA_DATA(rta), | |
1411 | RTA_PAYLOAD(rta)); | |
1412 | } | |
1413 | ||
d62a17ae | 1414 | /* Count overall nexthops so we can decide whether to use singlepath |
1415 | * or multipath case. */ | |
1416 | nexthop_num = 0; | |
7ee30f28 | 1417 | for (ALL_NEXTHOPS(re->ng, nexthop)) { |
d62a17ae | 1418 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_RECURSIVE)) |
1419 | continue; | |
996c9314 | 1420 | if (cmd == RTM_NEWROUTE && !NEXTHOP_IS_ACTIVE(nexthop->flags)) |
d62a17ae | 1421 | continue; |
1422 | if (cmd == RTM_DELROUTE | |
1423 | && !CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB)) | |
1424 | continue; | |
1425 | ||
1426 | nexthop_num++; | |
1427 | } | |
1428 | ||
1429 | /* Singlepath case. */ | |
1430 | if (nexthop_num == 1 || multipath_num == 1) { | |
1431 | nexthop_num = 0; | |
7ee30f28 | 1432 | for (ALL_NEXTHOPS(re->ng, nexthop)) { |
1f1d24a8 DS |
1433 | /* |
1434 | * So we want to cover 2 types of blackhole | |
1435 | * routes here: | |
1436 | * 1) A normal blackhole route( ala from a static | |
1437 | * install. | |
1438 | * 2) A recursively resolved blackhole route | |
1439 | */ | |
1440 | if (nexthop->type == NEXTHOP_TYPE_BLACKHOLE) { | |
1441 | switch (nexthop->bh_type) { | |
1442 | case BLACKHOLE_ADMINPROHIB: | |
1443 | req.r.rtm_type = RTN_PROHIBIT; | |
1444 | break; | |
1445 | case BLACKHOLE_REJECT: | |
1446 | req.r.rtm_type = RTN_UNREACHABLE; | |
1447 | break; | |
1448 | default: | |
1449 | req.r.rtm_type = RTN_BLACKHOLE; | |
1450 | break; | |
1451 | } | |
1452 | goto skip; | |
1453 | } | |
d62a17ae | 1454 | if (CHECK_FLAG(nexthop->flags, |
1455 | NEXTHOP_FLAG_RECURSIVE)) { | |
1456 | if (!setsrc) { | |
1457 | if (family == AF_INET) { | |
1458 | if (nexthop->rmap_src.ipv4 | |
1459 | .s_addr | |
1460 | != 0) { | |
1461 | src.ipv4 = | |
1462 | nexthop->rmap_src | |
1463 | .ipv4; | |
1464 | setsrc = 1; | |
1465 | } else if (nexthop->src.ipv4 | |
1466 | .s_addr | |
1467 | != 0) { | |
1468 | src.ipv4 = | |
1469 | nexthop->src | |
1470 | .ipv4; | |
1471 | setsrc = 1; | |
1472 | } | |
1473 | } else if (family == AF_INET6) { | |
1474 | if (!IN6_IS_ADDR_UNSPECIFIED( | |
1475 | &nexthop->rmap_src | |
1476 | .ipv6)) { | |
1477 | src.ipv6 = | |
1478 | nexthop->rmap_src | |
1479 | .ipv6; | |
1480 | setsrc = 1; | |
1481 | } else if ( | |
1482 | !IN6_IS_ADDR_UNSPECIFIED( | |
1483 | &nexthop->src | |
1484 | .ipv6)) { | |
1485 | src.ipv6 = | |
1486 | nexthop->src | |
1487 | .ipv6; | |
1488 | setsrc = 1; | |
1489 | } | |
1490 | } | |
1491 | } | |
1492 | continue; | |
1493 | } | |
1494 | ||
1495 | if ((cmd == RTM_NEWROUTE | |
25b9cb0c | 1496 | && NEXTHOP_IS_ACTIVE(nexthop->flags)) |
d62a17ae | 1497 | || (cmd == RTM_DELROUTE |
1498 | && CHECK_FLAG(nexthop->flags, | |
1499 | NEXTHOP_FLAG_FIB))) { | |
1500 | routedesc = nexthop->rparent | |
8b1450b9 RW |
1501 | ? "recursive, single-path" |
1502 | : "single-path"; | |
d62a17ae | 1503 | |
d62a17ae | 1504 | _netlink_route_build_singlepath( |
1505 | routedesc, bytelen, nexthop, &req.n, | |
1506 | &req.r, sizeof req, cmd); | |
1507 | nexthop_num++; | |
1508 | break; | |
1509 | } | |
1510 | } | |
1511 | if (setsrc && (cmd == RTM_NEWROUTE)) { | |
1512 | if (family == AF_INET) | |
1513 | addattr_l(&req.n, sizeof req, RTA_PREFSRC, | |
1514 | &src.ipv4, bytelen); | |
1515 | else if (family == AF_INET6) | |
1516 | addattr_l(&req.n, sizeof req, RTA_PREFSRC, | |
1517 | &src.ipv6, bytelen); | |
1518 | } | |
1519 | } else { | |
1520 | char buf[NL_PKT_BUF_SIZE]; | |
1521 | struct rtattr *rta = (void *)buf; | |
1522 | struct rtnexthop *rtnh; | |
1523 | union g_addr *src1 = NULL; | |
1524 | ||
1525 | rta->rta_type = RTA_MULTIPATH; | |
1526 | rta->rta_len = RTA_LENGTH(0); | |
1527 | rtnh = RTA_DATA(rta); | |
1528 | ||
1529 | nexthop_num = 0; | |
7ee30f28 | 1530 | for (ALL_NEXTHOPS(re->ng, nexthop)) { |
d62a17ae | 1531 | if (nexthop_num >= multipath_num) |
1532 | break; | |
1533 | ||
1534 | if (CHECK_FLAG(nexthop->flags, | |
1535 | NEXTHOP_FLAG_RECURSIVE)) { | |
1536 | /* This only works for IPv4 now */ | |
1537 | if (!setsrc) { | |
1538 | if (family == AF_INET) { | |
1539 | if (nexthop->rmap_src.ipv4 | |
1540 | .s_addr | |
1541 | != 0) { | |
1542 | src.ipv4 = | |
1543 | nexthop->rmap_src | |
1544 | .ipv4; | |
1545 | setsrc = 1; | |
1546 | } else if (nexthop->src.ipv4 | |
1547 | .s_addr | |
1548 | != 0) { | |
1549 | src.ipv4 = | |
1550 | nexthop->src | |
1551 | .ipv4; | |
1552 | setsrc = 1; | |
1553 | } | |
1554 | } else if (family == AF_INET6) { | |
1555 | if (!IN6_IS_ADDR_UNSPECIFIED( | |
1556 | &nexthop->rmap_src | |
1557 | .ipv6)) { | |
1558 | src.ipv6 = | |
1559 | nexthop->rmap_src | |
1560 | .ipv6; | |
1561 | setsrc = 1; | |
1562 | } else if ( | |
1563 | !IN6_IS_ADDR_UNSPECIFIED( | |
1564 | &nexthop->src | |
1565 | .ipv6)) { | |
1566 | src.ipv6 = | |
1567 | nexthop->src | |
1568 | .ipv6; | |
1569 | setsrc = 1; | |
1570 | } | |
1571 | } | |
1572 | } | |
1573 | continue; | |
1574 | } | |
1575 | ||
1576 | if ((cmd == RTM_NEWROUTE | |
25b9cb0c | 1577 | && NEXTHOP_IS_ACTIVE(nexthop->flags)) |
d62a17ae | 1578 | || (cmd == RTM_DELROUTE |
1579 | && CHECK_FLAG(nexthop->flags, | |
1580 | NEXTHOP_FLAG_FIB))) { | |
1581 | routedesc = nexthop->rparent | |
8b1450b9 RW |
1582 | ? "recursive, multipath" |
1583 | : "multipath"; | |
d62a17ae | 1584 | nexthop_num++; |
1585 | ||
d62a17ae | 1586 | _netlink_route_build_multipath( |
1587 | routedesc, bytelen, nexthop, rta, rtnh, | |
1588 | &req.r, &src1); | |
1589 | rtnh = RTNH_NEXT(rtnh); | |
1590 | ||
1591 | if (!setsrc && src1) { | |
1592 | if (family == AF_INET) | |
1593 | src.ipv4 = src1->ipv4; | |
1594 | else if (family == AF_INET6) | |
1595 | src.ipv6 = src1->ipv6; | |
1596 | ||
1597 | setsrc = 1; | |
1598 | } | |
1599 | } | |
1600 | } | |
1601 | if (setsrc && (cmd == RTM_NEWROUTE)) { | |
1602 | if (family == AF_INET) | |
1603 | addattr_l(&req.n, sizeof req, RTA_PREFSRC, | |
1604 | &src.ipv4, bytelen); | |
1605 | else if (family == AF_INET6) | |
1606 | addattr_l(&req.n, sizeof req, RTA_PREFSRC, | |
1607 | &src.ipv6, bytelen); | |
1608 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1609 | zlog_debug("Setting source"); | |
1610 | } | |
1611 | ||
1612 | if (rta->rta_len > RTA_LENGTH(0)) | |
1613 | addattr_l(&req.n, NL_PKT_BUF_SIZE, RTA_MULTIPATH, | |
1614 | RTA_DATA(rta), RTA_PAYLOAD(rta)); | |
1615 | } | |
718e3744 | 1616 | |
d62a17ae | 1617 | /* If there is no useful nexthop then return. */ |
1618 | if (nexthop_num == 0) { | |
1619 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1620 | zlog_debug( | |
1621 | "netlink_route_multipath(): No useful nexthop."); | |
1622 | return 0; | |
1623 | } | |
718e3744 | 1624 | |
7021c425 | 1625 | skip: |
718e3744 | 1626 | |
d62a17ae | 1627 | /* Destination netlink address. */ |
1628 | memset(&snl, 0, sizeof snl); | |
1629 | snl.nl_family = AF_NETLINK; | |
718e3744 | 1630 | |
d62a17ae | 1631 | /* Talk to netlink socket. */ |
1632 | return netlink_talk(netlink_talk_filter, &req.n, &zns->netlink_cmd, zns, | |
1633 | 0); | |
718e3744 | 1634 | } |
1635 | ||
43b5cc5e | 1636 | int kernel_get_ipmr_sg_stats(struct zebra_vrf *zvrf, void *in) |
e3be0432 | 1637 | { |
d62a17ae | 1638 | int suc = 0; |
1639 | struct mcast_route_data *mr = (struct mcast_route_data *)in; | |
bd8b9272 DS |
1640 | struct { |
1641 | struct nlmsghdr n; | |
1642 | struct ndmsg ndm; | |
1643 | char buf[256]; | |
1644 | } req; | |
e3be0432 | 1645 | |
d62a17ae | 1646 | mroute = mr; |
5895d33f | 1647 | struct zebra_ns *zns; |
bd8b9272 | 1648 | |
009f8ad5 | 1649 | zns = zvrf->zns; |
bd8b9272 DS |
1650 | memset(&req.n, 0, sizeof(req.n)); |
1651 | memset(&req.ndm, 0, sizeof(req.ndm)); | |
1652 | ||
1653 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)); | |
1654 | req.n.nlmsg_flags = NLM_F_REQUEST; | |
1655 | req.n.nlmsg_pid = zns->netlink_cmd.snl.nl_pid; | |
1656 | ||
1657 | req.ndm.ndm_family = RTNL_FAMILY_IPMR; | |
1658 | req.n.nlmsg_type = RTM_GETROUTE; | |
1659 | ||
1660 | addattr_l(&req.n, sizeof(req), RTA_IIF, &mroute->ifindex, 4); | |
1661 | addattr_l(&req.n, sizeof(req), RTA_OIF, &mroute->ifindex, 4); | |
1662 | addattr_l(&req.n, sizeof(req), RTA_SRC, &mroute->sg.src.s_addr, 4); | |
1663 | addattr_l(&req.n, sizeof(req), RTA_DST, &mroute->sg.grp.s_addr, 4); | |
1664 | addattr_l(&req.n, sizeof(req), RTA_TABLE, &zvrf->table_id, 4); | |
e3be0432 | 1665 | |
bd8b9272 DS |
1666 | suc = netlink_talk(netlink_route_change_read_multicast, &req.n, |
1667 | &zns->netlink_cmd, zns, 0); | |
e3be0432 | 1668 | |
bd8b9272 | 1669 | mroute = NULL; |
d62a17ae | 1670 | return suc; |
e3be0432 DS |
1671 | } |
1672 | ||
7d974ba3 DS |
1673 | void kernel_route_rib(struct route_node *rn, struct prefix *p, |
1674 | struct prefix *src_p, struct route_entry *old, | |
1675 | struct route_entry *new) | |
718e3744 | 1676 | { |
0c555cc6 DS |
1677 | int ret = 0; |
1678 | ||
0af35d90 RW |
1679 | assert(old || new); |
1680 | ||
0c555cc6 DS |
1681 | if (new) { |
1682 | if (p->family == AF_INET) | |
1683 | ret = netlink_route_multipath(RTM_NEWROUTE, p, src_p, | |
1684 | new, (old) ? 1 : 0); | |
1685 | else { | |
1686 | /* | |
1687 | * So v6 route replace semantics are not in | |
1688 | * the kernel at this point as I understand it. | |
1689 | * So let's do a delete than an add. | |
1690 | * In the future once v6 route replace semantics | |
1691 | * are in we can figure out what to do here to | |
1692 | * allow working with old and new kernels. | |
1693 | * | |
1694 | * I'm also intentionally ignoring the failure case | |
1695 | * of the route delete. If that happens yeah we're | |
1696 | * screwed. | |
1697 | */ | |
1698 | if (old) | |
996c9314 LB |
1699 | netlink_route_multipath(RTM_DELROUTE, p, src_p, |
1700 | old, 0); | |
1701 | ret = netlink_route_multipath(RTM_NEWROUTE, p, src_p, | |
1702 | new, 0); | |
0c555cc6 | 1703 | } |
7d974ba3 | 1704 | kernel_route_rib_pass_fail(rn, p, new, |
996c9314 LB |
1705 | (!ret) ? SOUTHBOUND_INSTALL_SUCCESS |
1706 | : SOUTHBOUND_INSTALL_FAILURE); | |
0c555cc6 DS |
1707 | return; |
1708 | } | |
718e3744 | 1709 | |
0c555cc6 DS |
1710 | if (old) { |
1711 | ret = netlink_route_multipath(RTM_DELROUTE, p, src_p, old, 0); | |
e7fcb843 | 1712 | |
7d974ba3 | 1713 | kernel_route_rib_pass_fail(rn, p, old, |
996c9314 LB |
1714 | (!ret) ? SOUTHBOUND_DELETE_SUCCESS |
1715 | : SOUTHBOUND_DELETE_FAILURE); | |
0c555cc6 | 1716 | } |
718e3744 | 1717 | } |
1718 | ||
d62a17ae | 1719 | int kernel_neigh_update(int add, int ifindex, uint32_t addr, char *lla, |
5895d33f | 1720 | int llalen, ns_id_t ns_id) |
6b8a5694 | 1721 | { |
d62a17ae | 1722 | return netlink_neigh_update(add ? RTM_NEWNEIGH : RTM_DELNEIGH, ifindex, |
5895d33f | 1723 | addr, lla, llalen, ns_id); |
6b8a5694 | 1724 | } |
718e3744 | 1725 | |
13d60d35 | 1726 | /* |
1727 | * Add remote VTEP to the flood list for this VxLAN interface (VNI). This | |
1728 | * is done by adding an FDB entry with a MAC of 00:00:00:00:00:00. | |
1729 | */ | |
d62a17ae | 1730 | static int netlink_vxlan_flood_list_update(struct interface *ifp, |
1731 | struct in_addr *vtep_ip, int cmd) | |
13d60d35 | 1732 | { |
5895d33f | 1733 | struct zebra_ns *zns; |
d62a17ae | 1734 | struct { |
1735 | struct nlmsghdr n; | |
1736 | struct ndmsg ndm; | |
1737 | char buf[256]; | |
1738 | } req; | |
d7c0a89a | 1739 | uint8_t dst_mac[6] = {0x0, 0x0, 0x0, 0x0, 0x0, 0x0}; |
009f8ad5 | 1740 | struct zebra_vrf *zvrf = zebra_vrf_lookup_by_id(ifp->vrf_id); |
d62a17ae | 1741 | |
009f8ad5 | 1742 | zns = zvrf->zns; |
d62a17ae | 1743 | memset(&req.n, 0, sizeof(req.n)); |
1744 | memset(&req.ndm, 0, sizeof(req.ndm)); | |
1745 | ||
1746 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)); | |
1747 | req.n.nlmsg_flags = NLM_F_REQUEST; | |
1748 | if (cmd == RTM_NEWNEIGH) | |
1749 | req.n.nlmsg_flags |= (NLM_F_CREATE | NLM_F_APPEND); | |
1750 | req.n.nlmsg_type = cmd; | |
1751 | req.ndm.ndm_family = PF_BRIDGE; | |
1752 | req.ndm.ndm_state = NUD_NOARP | NUD_PERMANENT; | |
1753 | req.ndm.ndm_flags |= NTF_SELF; // Handle by "self", not "master" | |
1754 | ||
1755 | ||
1756 | addattr_l(&req.n, sizeof(req), NDA_LLADDR, &dst_mac, 6); | |
1757 | req.ndm.ndm_ifindex = ifp->ifindex; | |
1758 | addattr_l(&req.n, sizeof(req), NDA_DST, &vtep_ip->s_addr, 4); | |
1759 | ||
1760 | return netlink_talk(netlink_talk_filter, &req.n, &zns->netlink_cmd, zns, | |
1761 | 0); | |
13d60d35 | 1762 | } |
1763 | ||
1764 | /* | |
d62a17ae | 1765 | * Add remote VTEP for this VxLAN interface (VNI). In Linux, this involves |
1766 | * adding | |
13d60d35 | 1767 | * a "flood" MAC FDB entry. |
1768 | */ | |
d62a17ae | 1769 | int kernel_add_vtep(vni_t vni, struct interface *ifp, struct in_addr *vtep_ip) |
13d60d35 | 1770 | { |
d62a17ae | 1771 | if (IS_ZEBRA_DEBUG_VXLAN) |
1772 | zlog_debug("Install %s into flood list for VNI %u intf %s(%u)", | |
1773 | inet_ntoa(*vtep_ip), vni, ifp->name, ifp->ifindex); | |
13d60d35 | 1774 | |
d62a17ae | 1775 | return netlink_vxlan_flood_list_update(ifp, vtep_ip, RTM_NEWNEIGH); |
13d60d35 | 1776 | } |
1777 | ||
1778 | /* | |
1779 | * Remove remote VTEP for this VxLAN interface (VNI). In Linux, this involves | |
1780 | * deleting the "flood" MAC FDB entry. | |
1781 | */ | |
d62a17ae | 1782 | int kernel_del_vtep(vni_t vni, struct interface *ifp, struct in_addr *vtep_ip) |
13d60d35 | 1783 | { |
d62a17ae | 1784 | if (IS_ZEBRA_DEBUG_VXLAN) |
1785 | zlog_debug( | |
1786 | "Uninstall %s from flood list for VNI %u intf %s(%u)", | |
1787 | inet_ntoa(*vtep_ip), vni, ifp->name, ifp->ifindex); | |
13d60d35 | 1788 | |
d62a17ae | 1789 | return netlink_vxlan_flood_list_update(ifp, vtep_ip, RTM_DELNEIGH); |
13d60d35 | 1790 | } |
1791 | ||
2232a77c | 1792 | #ifndef NDA_RTA |
d62a17ae | 1793 | #define NDA_RTA(r) \ |
1794 | ((struct rtattr *)(((char *)(r)) + NLMSG_ALIGN(sizeof(struct ndmsg)))) | |
2232a77c | 1795 | #endif |
1796 | ||
d62a17ae | 1797 | static int netlink_macfdb_change(struct sockaddr_nl *snl, struct nlmsghdr *h, |
5895d33f | 1798 | int len, ns_id_t ns_id) |
2232a77c | 1799 | { |
d62a17ae | 1800 | struct ndmsg *ndm; |
1801 | struct interface *ifp; | |
1802 | struct zebra_if *zif; | |
d62a17ae | 1803 | struct rtattr *tb[NDA_MAX + 1]; |
1804 | struct interface *br_if; | |
1805 | struct ethaddr mac; | |
1806 | vlanid_t vid = 0; | |
1807 | struct prefix vtep_ip; | |
1808 | int vid_present = 0, dst_present = 0; | |
1809 | char buf[ETHER_ADDR_STRLEN]; | |
1810 | char vid_buf[20]; | |
1811 | char dst_buf[30]; | |
d7c0a89a | 1812 | uint8_t sticky = 0; |
d62a17ae | 1813 | |
1814 | ndm = NLMSG_DATA(h); | |
1815 | ||
2853fed6 | 1816 | /* We only process macfdb notifications if EVPN is enabled */ |
1817 | if (!is_evpn_enabled()) | |
1818 | return 0; | |
1819 | ||
d62a17ae | 1820 | /* The interface should exist. */ |
5895d33f | 1821 | ifp = if_lookup_by_index_per_ns(zebra_ns_lookup(ns_id), |
d62a17ae | 1822 | ndm->ndm_ifindex); |
2853fed6 | 1823 | if (!ifp || !ifp->info) |
d62a17ae | 1824 | return 0; |
1825 | ||
1826 | /* The interface should be something we're interested in. */ | |
1827 | if (!IS_ZEBRA_IF_BRIDGE_SLAVE(ifp)) | |
1828 | return 0; | |
1829 | ||
1830 | /* Drop "permanent" entries. */ | |
1831 | if (ndm->ndm_state & NUD_PERMANENT) | |
1832 | return 0; | |
1833 | ||
1834 | zif = (struct zebra_if *)ifp->info; | |
1835 | if ((br_if = zif->brslave_info.br_if) == NULL) { | |
1836 | zlog_warn("%s family %s IF %s(%u) brIF %u - no bridge master", | |
1837 | nl_msg_type_to_str(h->nlmsg_type), | |
1838 | nl_family_to_str(ndm->ndm_family), ifp->name, | |
1839 | ndm->ndm_ifindex, zif->brslave_info.bridge_ifindex); | |
1840 | return 0; | |
1841 | } | |
1842 | ||
1843 | /* Parse attributes and extract fields of interest. */ | |
1844 | memset(tb, 0, sizeof tb); | |
1845 | netlink_parse_rtattr(tb, NDA_MAX, NDA_RTA(ndm), len); | |
1846 | ||
1847 | if (!tb[NDA_LLADDR]) { | |
1848 | zlog_warn("%s family %s IF %s(%u) brIF %u - no LLADDR", | |
1849 | nl_msg_type_to_str(h->nlmsg_type), | |
1850 | nl_family_to_str(ndm->ndm_family), ifp->name, | |
1851 | ndm->ndm_ifindex, zif->brslave_info.bridge_ifindex); | |
1852 | return 0; | |
1853 | } | |
1854 | ||
ff8b7eb8 | 1855 | if (RTA_PAYLOAD(tb[NDA_LLADDR]) != ETH_ALEN) { |
d62a17ae | 1856 | zlog_warn( |
df0b13cf | 1857 | "%s family %s IF %s(%u) brIF %u - LLADDR is not MAC, len %lu", |
d62a17ae | 1858 | nl_msg_type_to_str(h->nlmsg_type), |
1859 | nl_family_to_str(ndm->ndm_family), ifp->name, | |
1860 | ndm->ndm_ifindex, zif->brslave_info.bridge_ifindex, | |
df0b13cf | 1861 | (unsigned long)RTA_PAYLOAD(tb[NDA_LLADDR])); |
d62a17ae | 1862 | return 0; |
1863 | } | |
1864 | ||
ff8b7eb8 | 1865 | memcpy(&mac, RTA_DATA(tb[NDA_LLADDR]), ETH_ALEN); |
d62a17ae | 1866 | |
1867 | if ((NDA_VLAN <= NDA_MAX) && tb[NDA_VLAN]) { | |
1868 | vid_present = 1; | |
d7c0a89a | 1869 | vid = *(uint16_t *)RTA_DATA(tb[NDA_VLAN]); |
d62a17ae | 1870 | sprintf(vid_buf, " VLAN %u", vid); |
1871 | } | |
1872 | ||
1873 | if (tb[NDA_DST]) { | |
1874 | /* TODO: Only IPv4 supported now. */ | |
1875 | dst_present = 1; | |
1876 | vtep_ip.family = AF_INET; | |
1877 | vtep_ip.prefixlen = IPV4_MAX_BITLEN; | |
1878 | memcpy(&(vtep_ip.u.prefix4.s_addr), RTA_DATA(tb[NDA_DST]), | |
1879 | IPV4_MAX_BYTELEN); | |
1880 | sprintf(dst_buf, " dst %s", inet_ntoa(vtep_ip.u.prefix4)); | |
1881 | } | |
1882 | ||
1883 | sticky = (ndm->ndm_state & NUD_NOARP) ? 1 : 0; | |
1884 | ||
1885 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1886 | zlog_debug("Rx %s family %s IF %s(%u)%s %sMAC %s%s", | |
1887 | nl_msg_type_to_str(h->nlmsg_type), | |
1888 | nl_family_to_str(ndm->ndm_family), ifp->name, | |
1889 | ndm->ndm_ifindex, vid_present ? vid_buf : "", | |
1890 | sticky ? "sticky " : "", | |
1891 | prefix_mac2str(&mac, buf, sizeof(buf)), | |
1892 | dst_present ? dst_buf : ""); | |
1893 | ||
1894 | if (filter_vlan && vid != filter_vlan) | |
1895 | return 0; | |
1896 | ||
1897 | /* If add or update, do accordingly if learnt on a "local" interface; if | |
1898 | * the notification is over VxLAN, this has to be related to | |
1899 | * multi-homing, | |
1900 | * so perform an implicit delete of any local entry (if it exists). | |
1901 | */ | |
1902 | if (h->nlmsg_type == RTM_NEWNEIGH) { | |
1903 | /* Drop "permanent" entries. */ | |
1904 | if (ndm->ndm_state & NUD_PERMANENT) | |
1905 | return 0; | |
1906 | ||
1907 | if (IS_ZEBRA_IF_VXLAN(ifp)) | |
1908 | return zebra_vxlan_check_del_local_mac(ifp, br_if, &mac, | |
1909 | vid); | |
1910 | ||
1911 | return zebra_vxlan_local_mac_add_update(ifp, br_if, &mac, vid, | |
1912 | sticky); | |
1913 | } | |
1914 | ||
1915 | /* This is a delete notification. | |
1916 | * 1. For a MAC over VxLan, check if it needs to be refreshed(readded) | |
1917 | * 2. For a MAC over "local" interface, delete the mac | |
1918 | * Note: We will get notifications from both bridge driver and VxLAN | |
1919 | * driver. | |
1920 | * Ignore the notification from VxLan driver as it is also generated | |
1921 | * when mac moves from remote to local. | |
1922 | */ | |
1923 | if (dst_present) | |
1924 | return 0; | |
1925 | ||
1926 | if (IS_ZEBRA_IF_VXLAN(ifp)) | |
1927 | return zebra_vxlan_check_readd_remote_mac(ifp, br_if, &mac, | |
1928 | vid); | |
1929 | ||
1930 | return zebra_vxlan_local_mac_del(ifp, br_if, &mac, vid); | |
2232a77c | 1931 | } |
1932 | ||
d62a17ae | 1933 | static int netlink_macfdb_table(struct sockaddr_nl *snl, struct nlmsghdr *h, |
1934 | ns_id_t ns_id, int startup) | |
2232a77c | 1935 | { |
d62a17ae | 1936 | int len; |
1937 | struct ndmsg *ndm; | |
2232a77c | 1938 | |
d62a17ae | 1939 | if (h->nlmsg_type != RTM_NEWNEIGH) |
1940 | return 0; | |
2232a77c | 1941 | |
d62a17ae | 1942 | /* Length validity. */ |
1943 | len = h->nlmsg_len - NLMSG_LENGTH(sizeof(struct ndmsg)); | |
1944 | if (len < 0) | |
1945 | return -1; | |
2232a77c | 1946 | |
d62a17ae | 1947 | /* We are interested only in AF_BRIDGE notifications. */ |
1948 | ndm = NLMSG_DATA(h); | |
1949 | if (ndm->ndm_family != AF_BRIDGE) | |
1950 | return 0; | |
2232a77c | 1951 | |
5895d33f | 1952 | return netlink_macfdb_change(snl, h, len, ns_id); |
2232a77c | 1953 | } |
1954 | ||
1955 | /* Request for MAC FDB information from the kernel */ | |
d62a17ae | 1956 | static int netlink_request_macs(struct zebra_ns *zns, int family, int type, |
1957 | ifindex_t master_ifindex) | |
2232a77c | 1958 | { |
d62a17ae | 1959 | struct { |
1960 | struct nlmsghdr n; | |
1961 | struct ifinfomsg ifm; | |
1962 | char buf[256]; | |
1963 | } req; | |
1964 | ||
1965 | /* Form the request, specifying filter (rtattr) if needed. */ | |
1966 | memset(&req, 0, sizeof(req)); | |
1967 | req.n.nlmsg_type = type; | |
1968 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg)); | |
1969 | req.ifm.ifi_family = family; | |
1970 | if (master_ifindex) | |
1971 | addattr32(&req.n, sizeof(req), IFLA_MASTER, master_ifindex); | |
1972 | ||
1973 | return netlink_request(&zns->netlink_cmd, &req.n); | |
2232a77c | 1974 | } |
1975 | ||
1976 | /* | |
1977 | * MAC forwarding database read using netlink interface. This is invoked | |
1978 | * at startup. | |
1979 | */ | |
d62a17ae | 1980 | int netlink_macfdb_read(struct zebra_ns *zns) |
2232a77c | 1981 | { |
d62a17ae | 1982 | int ret; |
1983 | ||
1984 | /* Get bridge FDB table. */ | |
1985 | ret = netlink_request_macs(zns, AF_BRIDGE, RTM_GETNEIGH, 0); | |
1986 | if (ret < 0) | |
1987 | return ret; | |
1988 | /* We are reading entire table. */ | |
1989 | filter_vlan = 0; | |
1990 | ret = netlink_parse_info(netlink_macfdb_table, &zns->netlink_cmd, zns, | |
1991 | 0, 1); | |
1992 | ||
1993 | return ret; | |
2232a77c | 1994 | } |
1995 | ||
1996 | /* | |
1997 | * MAC forwarding database read using netlink interface. This is for a | |
1998 | * specific bridge and matching specific access VLAN (if VLAN-aware bridge). | |
1999 | */ | |
d62a17ae | 2000 | int netlink_macfdb_read_for_bridge(struct zebra_ns *zns, struct interface *ifp, |
2001 | struct interface *br_if) | |
2232a77c | 2002 | { |
d62a17ae | 2003 | struct zebra_if *br_zif; |
2004 | struct zebra_if *zif; | |
2005 | struct zebra_l2info_vxlan *vxl; | |
2006 | int ret = 0; | |
2007 | ||
2008 | ||
2009 | /* Save VLAN we're filtering on, if needed. */ | |
2010 | br_zif = (struct zebra_if *)br_if->info; | |
2011 | zif = (struct zebra_if *)ifp->info; | |
2012 | vxl = &zif->l2info.vxl; | |
2013 | if (IS_ZEBRA_IF_BRIDGE_VLAN_AWARE(br_zif)) | |
2014 | filter_vlan = vxl->access_vlan; | |
2015 | ||
2016 | /* Get bridge FDB table for specific bridge - we do the VLAN filtering. | |
2017 | */ | |
2018 | ret = netlink_request_macs(zns, AF_BRIDGE, RTM_GETNEIGH, | |
2019 | br_if->ifindex); | |
2020 | if (ret < 0) | |
2021 | return ret; | |
2022 | ret = netlink_parse_info(netlink_macfdb_table, &zns->netlink_cmd, zns, | |
2023 | 0, 0); | |
2024 | ||
2025 | /* Reset VLAN filter. */ | |
2026 | filter_vlan = 0; | |
2027 | return ret; | |
2232a77c | 2028 | } |
2029 | ||
d62a17ae | 2030 | static int netlink_macfdb_update(struct interface *ifp, vlanid_t vid, |
2031 | struct ethaddr *mac, struct in_addr vtep_ip, | |
d7c0a89a | 2032 | int local, int cmd, uint8_t sticky) |
2232a77c | 2033 | { |
5895d33f | 2034 | struct zebra_ns *zns; |
d62a17ae | 2035 | struct { |
2036 | struct nlmsghdr n; | |
2037 | struct ndmsg ndm; | |
2038 | char buf[256]; | |
2039 | } req; | |
2040 | int dst_alen; | |
2041 | struct zebra_if *zif; | |
2042 | struct interface *br_if; | |
2043 | struct zebra_if *br_zif; | |
2044 | char buf[ETHER_ADDR_STRLEN]; | |
2045 | int vid_present = 0, dst_present = 0; | |
2046 | char vid_buf[20]; | |
2047 | char dst_buf[30]; | |
009f8ad5 | 2048 | struct zebra_vrf *zvrf = zebra_vrf_lookup_by_id(ifp->vrf_id); |
d62a17ae | 2049 | |
009f8ad5 | 2050 | zns = zvrf->zns; |
d62a17ae | 2051 | zif = ifp->info; |
2052 | if ((br_if = zif->brslave_info.br_if) == NULL) { | |
2053 | zlog_warn("MAC %s on IF %s(%u) - no mapping to bridge", | |
2054 | (cmd == RTM_NEWNEIGH) ? "add" : "del", ifp->name, | |
2055 | ifp->ifindex); | |
2056 | return -1; | |
2057 | } | |
2058 | ||
2059 | memset(&req.n, 0, sizeof(req.n)); | |
2060 | memset(&req.ndm, 0, sizeof(req.ndm)); | |
2061 | ||
2062 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)); | |
2063 | req.n.nlmsg_flags = NLM_F_REQUEST; | |
2064 | if (cmd == RTM_NEWNEIGH) | |
2065 | req.n.nlmsg_flags |= (NLM_F_CREATE | NLM_F_REPLACE); | |
2066 | req.n.nlmsg_type = cmd; | |
2067 | req.ndm.ndm_family = AF_BRIDGE; | |
2068 | req.ndm.ndm_flags |= NTF_SELF | NTF_MASTER; | |
2069 | req.ndm.ndm_state = NUD_REACHABLE; | |
2070 | ||
2071 | if (sticky) | |
2072 | req.ndm.ndm_state |= NUD_NOARP; | |
2073 | else | |
2074 | req.ndm.ndm_flags |= NTF_EXT_LEARNED; | |
2075 | ||
2076 | addattr_l(&req.n, sizeof(req), NDA_LLADDR, mac, 6); | |
2077 | req.ndm.ndm_ifindex = ifp->ifindex; | |
2078 | if (!local) { | |
2079 | dst_alen = 4; // TODO: hardcoded | |
2080 | addattr_l(&req.n, sizeof(req), NDA_DST, &vtep_ip, dst_alen); | |
2081 | dst_present = 1; | |
2082 | sprintf(dst_buf, " dst %s", inet_ntoa(vtep_ip)); | |
2083 | } | |
2084 | br_zif = (struct zebra_if *)br_if->info; | |
2085 | if (IS_ZEBRA_IF_BRIDGE_VLAN_AWARE(br_zif) && vid > 0) { | |
2086 | addattr16(&req.n, sizeof(req), NDA_VLAN, vid); | |
2087 | vid_present = 1; | |
2088 | sprintf(vid_buf, " VLAN %u", vid); | |
2089 | } | |
2090 | addattr32(&req.n, sizeof(req), NDA_MASTER, br_if->ifindex); | |
2091 | ||
2092 | if (IS_ZEBRA_DEBUG_KERNEL) | |
2093 | zlog_debug("Tx %s family %s IF %s(%u)%s %sMAC %s%s", | |
2094 | nl_msg_type_to_str(cmd), | |
2095 | nl_family_to_str(req.ndm.ndm_family), ifp->name, | |
2096 | ifp->ifindex, vid_present ? vid_buf : "", | |
2097 | sticky ? "sticky " : "", | |
2098 | prefix_mac2str(mac, buf, sizeof(buf)), | |
2099 | dst_present ? dst_buf : ""); | |
2100 | ||
2101 | return netlink_talk(netlink_talk_filter, &req.n, &zns->netlink_cmd, zns, | |
2102 | 0); | |
2232a77c | 2103 | } |
2104 | ||
d62a17ae | 2105 | #define NUD_VALID \ |
2106 | (NUD_PERMANENT | NUD_NOARP | NUD_REACHABLE | NUD_PROBE | NUD_STALE \ | |
2107 | | NUD_DELAY) | |
2232a77c | 2108 | |
d62a17ae | 2109 | static int netlink_ipneigh_change(struct sockaddr_nl *snl, struct nlmsghdr *h, |
5895d33f | 2110 | int len, ns_id_t ns_id) |
2232a77c | 2111 | { |
d62a17ae | 2112 | struct ndmsg *ndm; |
2113 | struct interface *ifp; | |
2114 | struct zebra_if *zif; | |
d62a17ae | 2115 | struct rtattr *tb[NDA_MAX + 1]; |
2116 | struct interface *link_if; | |
2117 | struct ethaddr mac; | |
2118 | struct ipaddr ip; | |
2119 | char buf[ETHER_ADDR_STRLEN]; | |
2120 | char buf2[INET6_ADDRSTRLEN]; | |
2121 | int mac_present = 0; | |
d7c0a89a | 2122 | uint8_t ext_learned; |
d62a17ae | 2123 | |
2124 | ndm = NLMSG_DATA(h); | |
2125 | ||
2126 | /* The interface should exist. */ | |
5895d33f | 2127 | ifp = if_lookup_by_index_per_ns(zebra_ns_lookup(ns_id), |
d62a17ae | 2128 | ndm->ndm_ifindex); |
2853fed6 | 2129 | if (!ifp || !ifp->info) |
d62a17ae | 2130 | return 0; |
2131 | ||
20089ae2 DS |
2132 | zif = (struct zebra_if *)ifp->info; |
2133 | ||
2134 | /* Parse attributes and extract fields of interest. */ | |
2135 | memset(tb, 0, sizeof tb); | |
2136 | netlink_parse_rtattr(tb, NDA_MAX, NDA_RTA(ndm), len); | |
2137 | ||
2138 | if (!tb[NDA_DST]) { | |
2139 | zlog_warn("%s family %s IF %s(%u) - no DST", | |
2140 | nl_msg_type_to_str(h->nlmsg_type), | |
2141 | nl_family_to_str(ndm->ndm_family), ifp->name, | |
2142 | ndm->ndm_ifindex); | |
d62a17ae | 2143 | return 0; |
20089ae2 DS |
2144 | } |
2145 | ||
2146 | memset(&ip, 0, sizeof(struct ipaddr)); | |
2147 | ip.ipa_type = (ndm->ndm_family == AF_INET) ? IPADDR_V4 : IPADDR_V6; | |
2148 | memcpy(&ip.ip.addr, RTA_DATA(tb[NDA_DST]), RTA_PAYLOAD(tb[NDA_DST])); | |
2149 | ||
2150 | /* Drop some "permanent" entries. */ | |
2151 | if (ndm->ndm_state & NUD_PERMANENT) { | |
2152 | char buf[16] = "169.254.0.1"; | |
2153 | struct in_addr ipv4_ll; | |
2154 | ||
2155 | if (ndm->ndm_family != AF_INET) | |
2156 | return 0; | |
2157 | ||
2158 | if (!zif->v6_2_v4_ll_neigh_entry) | |
2159 | return 0; | |
2160 | ||
2161 | if (h->nlmsg_type != RTM_DELNEIGH) | |
2162 | return 0; | |
2163 | ||
2164 | inet_pton(AF_INET, buf, &ipv4_ll); | |
2165 | if (ipv4_ll.s_addr != ip.ip._v4_addr.s_addr) | |
2166 | return 0; | |
2167 | ||
2168 | if_nbr_ipv6ll_to_ipv4ll_neigh_update( | |
2169 | ifp, &zif->v6_2_v4_ll_addr6, true); | |
2170 | return 0; | |
2171 | } | |
d62a17ae | 2172 | |
d62a17ae | 2173 | /* The neighbor is present on an SVI. From this, we locate the |
2174 | * underlying | |
2175 | * bridge because we're only interested in neighbors on a VxLAN bridge. | |
2176 | * The bridge is located based on the nature of the SVI: | |
2177 | * (a) In the case of a VLAN-aware bridge, the SVI is a L3 VLAN | |
2178 | * interface | |
2179 | * and is linked to the bridge | |
2180 | * (b) In the case of a VLAN-unaware bridge, the SVI is the bridge | |
2181 | * inteface | |
2182 | * itself | |
2183 | */ | |
2184 | if (IS_ZEBRA_IF_VLAN(ifp)) { | |
5895d33f | 2185 | link_if = if_lookup_by_index_per_ns(zebra_ns_lookup(ns_id), |
71349e03 | 2186 | zif->link_ifindex); |
d62a17ae | 2187 | if (!link_if) |
2188 | return 0; | |
2189 | } else if (IS_ZEBRA_IF_BRIDGE(ifp)) | |
2190 | link_if = ifp; | |
2191 | else | |
2192 | return 0; | |
2193 | ||
d62a17ae | 2194 | memset(&mac, 0, sizeof(struct ethaddr)); |
d62a17ae | 2195 | if (h->nlmsg_type == RTM_NEWNEIGH) { |
2196 | if (tb[NDA_LLADDR]) { | |
ff8b7eb8 | 2197 | if (RTA_PAYLOAD(tb[NDA_LLADDR]) != ETH_ALEN) { |
d62a17ae | 2198 | zlog_warn( |
df0b13cf | 2199 | "%s family %s IF %s(%u) - LLADDR is not MAC, len %lu", |
d62a17ae | 2200 | nl_msg_type_to_str(h->nlmsg_type), |
2201 | nl_family_to_str(ndm->ndm_family), | |
2202 | ifp->name, ndm->ndm_ifindex, | |
996c9314 LB |
2203 | (unsigned long)RTA_PAYLOAD( |
2204 | tb[NDA_LLADDR])); | |
d62a17ae | 2205 | return 0; |
2206 | } | |
2207 | ||
2208 | mac_present = 1; | |
ff8b7eb8 | 2209 | memcpy(&mac, RTA_DATA(tb[NDA_LLADDR]), ETH_ALEN); |
d62a17ae | 2210 | } |
2211 | ||
2212 | ext_learned = (ndm->ndm_flags & NTF_EXT_LEARNED) ? 1 : 0; | |
2213 | ||
2214 | if (IS_ZEBRA_DEBUG_KERNEL) | |
2215 | zlog_debug( | |
2216 | "Rx %s family %s IF %s(%u) IP %s MAC %s state 0x%x flags 0x%x", | |
2217 | nl_msg_type_to_str(h->nlmsg_type), | |
2218 | nl_family_to_str(ndm->ndm_family), ifp->name, | |
2219 | ndm->ndm_ifindex, | |
2220 | ipaddr2str(&ip, buf2, sizeof(buf2)), | |
2221 | mac_present | |
2222 | ? prefix_mac2str(&mac, buf, sizeof(buf)) | |
2223 | : "", | |
2224 | ndm->ndm_state, ndm->ndm_flags); | |
2225 | ||
2226 | /* If the neighbor state is valid for use, process as an add or | |
2227 | * update | |
2228 | * else process as a delete. Note that the delete handling may | |
2229 | * result | |
2230 | * in re-adding the neighbor if it is a valid "remote" neighbor. | |
2231 | */ | |
2232 | if (ndm->ndm_state & NUD_VALID) | |
ee69da27 | 2233 | return zebra_vxlan_handle_kernel_neigh_update( |
d62a17ae | 2234 | ifp, link_if, &ip, &mac, ndm->ndm_state, |
2235 | ext_learned); | |
2236 | ||
ee69da27 | 2237 | return zebra_vxlan_handle_kernel_neigh_del(ifp, link_if, &ip); |
d62a17ae | 2238 | } |
2239 | ||
2240 | if (IS_ZEBRA_DEBUG_KERNEL) | |
2241 | zlog_debug("Rx %s family %s IF %s(%u) IP %s", | |
2242 | nl_msg_type_to_str(h->nlmsg_type), | |
2243 | nl_family_to_str(ndm->ndm_family), ifp->name, | |
2244 | ndm->ndm_ifindex, | |
2245 | ipaddr2str(&ip, buf2, sizeof(buf2))); | |
2246 | ||
2247 | /* Process the delete - it may result in re-adding the neighbor if it is | |
2248 | * a valid "remote" neighbor. | |
2249 | */ | |
ee69da27 | 2250 | return zebra_vxlan_handle_kernel_neigh_del(ifp, link_if, &ip); |
2232a77c | 2251 | } |
2252 | ||
d62a17ae | 2253 | static int netlink_neigh_table(struct sockaddr_nl *snl, struct nlmsghdr *h, |
2254 | ns_id_t ns_id, int startup) | |
2232a77c | 2255 | { |
d62a17ae | 2256 | int len; |
2257 | struct ndmsg *ndm; | |
2232a77c | 2258 | |
d62a17ae | 2259 | if (h->nlmsg_type != RTM_NEWNEIGH) |
2260 | return 0; | |
2232a77c | 2261 | |
d62a17ae | 2262 | /* Length validity. */ |
2263 | len = h->nlmsg_len - NLMSG_LENGTH(sizeof(struct ndmsg)); | |
2264 | if (len < 0) | |
2265 | return -1; | |
2232a77c | 2266 | |
d62a17ae | 2267 | /* We are interested only in AF_INET or AF_INET6 notifications. */ |
2268 | ndm = NLMSG_DATA(h); | |
2269 | if (ndm->ndm_family != AF_INET && ndm->ndm_family != AF_INET6) | |
2270 | return 0; | |
2232a77c | 2271 | |
d62a17ae | 2272 | return netlink_neigh_change(snl, h, len); |
2232a77c | 2273 | } |
2274 | ||
2275 | /* Request for IP neighbor information from the kernel */ | |
d62a17ae | 2276 | static int netlink_request_neigh(struct zebra_ns *zns, int family, int type, |
2277 | ifindex_t ifindex) | |
2232a77c | 2278 | { |
d62a17ae | 2279 | struct { |
2280 | struct nlmsghdr n; | |
2281 | struct ndmsg ndm; | |
2282 | char buf[256]; | |
2283 | } req; | |
2284 | ||
2285 | /* Form the request, specifying filter (rtattr) if needed. */ | |
2286 | memset(&req, 0, sizeof(req)); | |
2287 | req.n.nlmsg_type = type; | |
2288 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)); | |
2289 | req.ndm.ndm_family = family; | |
2290 | if (ifindex) | |
2291 | addattr32(&req.n, sizeof(req), NDA_IFINDEX, ifindex); | |
2292 | ||
2293 | return netlink_request(&zns->netlink_cmd, &req.n); | |
2232a77c | 2294 | } |
2295 | ||
2296 | /* | |
2297 | * IP Neighbor table read using netlink interface. This is invoked | |
2298 | * at startup. | |
2299 | */ | |
d62a17ae | 2300 | int netlink_neigh_read(struct zebra_ns *zns) |
2232a77c | 2301 | { |
d62a17ae | 2302 | int ret; |
2232a77c | 2303 | |
d62a17ae | 2304 | /* Get IP neighbor table. */ |
2305 | ret = netlink_request_neigh(zns, AF_UNSPEC, RTM_GETNEIGH, 0); | |
2306 | if (ret < 0) | |
2307 | return ret; | |
2308 | ret = netlink_parse_info(netlink_neigh_table, &zns->netlink_cmd, zns, 0, | |
2309 | 1); | |
2232a77c | 2310 | |
d62a17ae | 2311 | return ret; |
2232a77c | 2312 | } |
2313 | ||
2314 | /* | |
2315 | * IP Neighbor table read using netlink interface. This is for a specific | |
2316 | * VLAN device. | |
2317 | */ | |
d62a17ae | 2318 | int netlink_neigh_read_for_vlan(struct zebra_ns *zns, struct interface *vlan_if) |
2232a77c | 2319 | { |
d62a17ae | 2320 | int ret = 0; |
2232a77c | 2321 | |
d62a17ae | 2322 | ret = netlink_request_neigh(zns, AF_UNSPEC, RTM_GETNEIGH, |
2323 | vlan_if->ifindex); | |
2324 | if (ret < 0) | |
2325 | return ret; | |
2326 | ret = netlink_parse_info(netlink_neigh_table, &zns->netlink_cmd, zns, 0, | |
2327 | 0); | |
2232a77c | 2328 | |
d62a17ae | 2329 | return ret; |
2232a77c | 2330 | } |
2331 | ||
d62a17ae | 2332 | int netlink_neigh_change(struct sockaddr_nl *snl, struct nlmsghdr *h, |
2333 | ns_id_t ns_id) | |
2232a77c | 2334 | { |
d62a17ae | 2335 | int len; |
2336 | struct ndmsg *ndm; | |
2232a77c | 2337 | |
d62a17ae | 2338 | if (!(h->nlmsg_type == RTM_NEWNEIGH || h->nlmsg_type == RTM_DELNEIGH)) |
2339 | return 0; | |
2232a77c | 2340 | |
d62a17ae | 2341 | /* Length validity. */ |
2342 | len = h->nlmsg_len - NLMSG_LENGTH(sizeof(struct ndmsg)); | |
2343 | if (len < 0) | |
2344 | return -1; | |
2232a77c | 2345 | |
d62a17ae | 2346 | /* Is this a notification for the MAC FDB or IP neighbor table? */ |
2347 | ndm = NLMSG_DATA(h); | |
2348 | if (ndm->ndm_family == AF_BRIDGE) | |
5895d33f | 2349 | return netlink_macfdb_change(snl, h, len, ns_id); |
2232a77c | 2350 | |
d62a17ae | 2351 | if (ndm->ndm_type != RTN_UNICAST) |
2352 | return 0; | |
2232a77c | 2353 | |
d62a17ae | 2354 | if (ndm->ndm_family == AF_INET || ndm->ndm_family == AF_INET6) |
5895d33f | 2355 | return netlink_ipneigh_change(snl, h, len, ns_id); |
2232a77c | 2356 | |
d62a17ae | 2357 | return 0; |
2232a77c | 2358 | } |
2359 | ||
d62a17ae | 2360 | static int netlink_neigh_update2(struct interface *ifp, struct ipaddr *ip, |
d7c0a89a | 2361 | struct ethaddr *mac, uint32_t flags, int cmd) |
2232a77c | 2362 | { |
d62a17ae | 2363 | struct { |
2364 | struct nlmsghdr n; | |
2365 | struct ndmsg ndm; | |
2366 | char buf[256]; | |
2367 | } req; | |
2368 | int ipa_len; | |
2369 | ||
5895d33f | 2370 | struct zebra_ns *zns; |
d62a17ae | 2371 | char buf[INET6_ADDRSTRLEN]; |
2372 | char buf2[ETHER_ADDR_STRLEN]; | |
009f8ad5 | 2373 | struct zebra_vrf *zvrf = zebra_vrf_lookup_by_id(ifp->vrf_id); |
d62a17ae | 2374 | |
009f8ad5 | 2375 | zns = zvrf->zns; |
d62a17ae | 2376 | memset(&req.n, 0, sizeof(req.n)); |
2377 | memset(&req.ndm, 0, sizeof(req.ndm)); | |
2378 | ||
2379 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)); | |
2380 | req.n.nlmsg_flags = NLM_F_REQUEST; | |
2381 | if (cmd == RTM_NEWNEIGH) | |
2382 | req.n.nlmsg_flags |= (NLM_F_CREATE | NLM_F_REPLACE); | |
2383 | req.n.nlmsg_type = cmd; // RTM_NEWNEIGH or RTM_DELNEIGH | |
2384 | req.ndm.ndm_family = IS_IPADDR_V4(ip) ? AF_INET : AF_INET6; | |
2385 | req.ndm.ndm_state = flags; | |
2386 | req.ndm.ndm_ifindex = ifp->ifindex; | |
2387 | req.ndm.ndm_type = RTN_UNICAST; | |
2388 | req.ndm.ndm_flags = NTF_EXT_LEARNED; | |
2389 | ||
2390 | ||
2391 | ipa_len = IS_IPADDR_V4(ip) ? IPV4_MAX_BYTELEN : IPV6_MAX_BYTELEN; | |
2392 | addattr_l(&req.n, sizeof(req), NDA_DST, &ip->ip.addr, ipa_len); | |
2393 | if (mac) | |
2394 | addattr_l(&req.n, sizeof(req), NDA_LLADDR, mac, 6); | |
2395 | ||
2396 | if (IS_ZEBRA_DEBUG_KERNEL) | |
2397 | zlog_debug("Tx %s family %s IF %s(%u) Neigh %s MAC %s", | |
2398 | nl_msg_type_to_str(cmd), | |
2399 | nl_family_to_str(req.ndm.ndm_family), ifp->name, | |
2400 | ifp->ifindex, ipaddr2str(ip, buf, sizeof(buf)), | |
2401 | mac ? prefix_mac2str(mac, buf2, sizeof(buf2)) | |
2402 | : "null"); | |
2403 | ||
2404 | return netlink_talk(netlink_talk_filter, &req.n, &zns->netlink_cmd, zns, | |
2405 | 0); | |
2232a77c | 2406 | } |
2407 | ||
d62a17ae | 2408 | int kernel_add_mac(struct interface *ifp, vlanid_t vid, struct ethaddr *mac, |
d7c0a89a | 2409 | struct in_addr vtep_ip, uint8_t sticky) |
2232a77c | 2410 | { |
d62a17ae | 2411 | return netlink_macfdb_update(ifp, vid, mac, vtep_ip, 0, RTM_NEWNEIGH, |
2412 | sticky); | |
2232a77c | 2413 | } |
2414 | ||
d62a17ae | 2415 | int kernel_del_mac(struct interface *ifp, vlanid_t vid, struct ethaddr *mac, |
2416 | struct in_addr vtep_ip, int local) | |
2232a77c | 2417 | { |
d62a17ae | 2418 | return netlink_macfdb_update(ifp, vid, mac, vtep_ip, local, |
2419 | RTM_DELNEIGH, 0); | |
2232a77c | 2420 | } |
2421 | ||
d62a17ae | 2422 | int kernel_add_neigh(struct interface *ifp, struct ipaddr *ip, |
2423 | struct ethaddr *mac) | |
2232a77c | 2424 | { |
e9d2cbde | 2425 | return netlink_neigh_update2(ifp, ip, mac, NUD_NOARP, RTM_NEWNEIGH); |
2232a77c | 2426 | } |
2427 | ||
d62a17ae | 2428 | int kernel_del_neigh(struct interface *ifp, struct ipaddr *ip) |
2232a77c | 2429 | { |
d62a17ae | 2430 | return netlink_neigh_update2(ifp, ip, NULL, 0, RTM_DELNEIGH); |
2232a77c | 2431 | } |
2432 | ||
40c7bdb0 | 2433 | /* |
2434 | * MPLS label forwarding table change via netlink interface. | |
2435 | */ | |
d62a17ae | 2436 | int netlink_mpls_multipath(int cmd, zebra_lsp_t *lsp) |
40c7bdb0 | 2437 | { |
d62a17ae | 2438 | mpls_lse_t lse; |
2439 | zebra_nhlfe_t *nhlfe; | |
2440 | struct nexthop *nexthop = NULL; | |
2441 | unsigned int nexthop_num; | |
2442 | const char *routedesc; | |
2443 | struct zebra_ns *zns = zebra_ns_lookup(NS_DEFAULT); | |
805444ce | 2444 | int route_type; |
d62a17ae | 2445 | |
2446 | struct { | |
2447 | struct nlmsghdr n; | |
2448 | struct rtmsg r; | |
2449 | char buf[NL_PKT_BUF_SIZE]; | |
2450 | } req; | |
2451 | ||
2452 | memset(&req, 0, sizeof req - NL_PKT_BUF_SIZE); | |
2453 | ||
d62a17ae | 2454 | /* |
2455 | * Count # nexthops so we can decide whether to use singlepath | |
2456 | * or multipath case. | |
2457 | */ | |
2458 | nexthop_num = 0; | |
2459 | for (nhlfe = lsp->nhlfe_list; nhlfe; nhlfe = nhlfe->next) { | |
2460 | nexthop = nhlfe->nexthop; | |
2461 | if (!nexthop) | |
2462 | continue; | |
2463 | if (cmd == RTM_NEWROUTE) { | |
2464 | /* Count all selected NHLFEs */ | |
2465 | if (CHECK_FLAG(nhlfe->flags, NHLFE_FLAG_SELECTED) | |
2466 | && CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE)) | |
2467 | nexthop_num++; | |
2468 | } else /* DEL */ | |
2469 | { | |
2470 | /* Count all installed NHLFEs */ | |
2471 | if (CHECK_FLAG(nhlfe->flags, NHLFE_FLAG_INSTALLED) | |
2472 | && CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB)) | |
2473 | nexthop_num++; | |
2474 | } | |
2475 | } | |
2476 | ||
8dc8a4b6 | 2477 | if ((nexthop_num == 0) || (!lsp->best_nhlfe && (cmd != RTM_DELROUTE))) |
d62a17ae | 2478 | return 0; |
2479 | ||
2480 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)); | |
2481 | req.n.nlmsg_flags = NLM_F_CREATE | NLM_F_REQUEST; | |
2482 | req.n.nlmsg_type = cmd; | |
2483 | req.n.nlmsg_pid = zns->netlink_cmd.snl.nl_pid; | |
2484 | ||
2485 | req.r.rtm_family = AF_MPLS; | |
2486 | req.r.rtm_table = RT_TABLE_MAIN; | |
2487 | req.r.rtm_dst_len = MPLS_LABEL_LEN_BITS; | |
d62a17ae | 2488 | req.r.rtm_scope = RT_SCOPE_UNIVERSE; |
2489 | req.r.rtm_type = RTN_UNICAST; | |
2490 | ||
8dc8a4b6 | 2491 | if (cmd == RTM_NEWROUTE) { |
d62a17ae | 2492 | /* We do a replace to handle update. */ |
2493 | req.n.nlmsg_flags |= NLM_F_REPLACE; | |
2494 | ||
8dc8a4b6 DS |
2495 | /* set the protocol value if installing */ |
2496 | route_type = re_type_from_lsp_type(lsp->best_nhlfe->type); | |
2497 | req.r.rtm_protocol = zebra2proto(route_type); | |
2498 | } | |
2499 | ||
d62a17ae | 2500 | /* Fill destination */ |
2501 | lse = mpls_lse_encode(lsp->ile.in_label, 0, 0, 1); | |
2502 | addattr_l(&req.n, sizeof req, RTA_DST, &lse, sizeof(mpls_lse_t)); | |
2503 | ||
2504 | /* Fill nexthops (paths) based on single-path or multipath. The paths | |
2505 | * chosen depend on the operation. | |
2506 | */ | |
2507 | if (nexthop_num == 1 || multipath_num == 1) { | |
8b1450b9 | 2508 | routedesc = "single-path"; |
d62a17ae | 2509 | _netlink_mpls_debug(cmd, lsp->ile.in_label, routedesc); |
2510 | ||
2511 | nexthop_num = 0; | |
2512 | for (nhlfe = lsp->nhlfe_list; nhlfe; nhlfe = nhlfe->next) { | |
2513 | nexthop = nhlfe->nexthop; | |
2514 | if (!nexthop) | |
2515 | continue; | |
2516 | ||
2517 | if ((cmd == RTM_NEWROUTE | |
2518 | && (CHECK_FLAG(nhlfe->flags, NHLFE_FLAG_SELECTED) | |
2519 | && CHECK_FLAG(nexthop->flags, | |
2520 | NEXTHOP_FLAG_ACTIVE))) | |
2521 | || (cmd == RTM_DELROUTE | |
2522 | && (CHECK_FLAG(nhlfe->flags, | |
2523 | NHLFE_FLAG_INSTALLED) | |
2524 | && CHECK_FLAG(nexthop->flags, | |
2525 | NEXTHOP_FLAG_FIB)))) { | |
2526 | /* Add the gateway */ | |
2527 | _netlink_mpls_build_singlepath(routedesc, nhlfe, | |
2528 | &req.n, &req.r, | |
2529 | sizeof req, cmd); | |
d62a17ae | 2530 | nexthop_num++; |
2531 | break; | |
2532 | } | |
2533 | } | |
2534 | } else /* Multipath case */ | |
2535 | { | |
2536 | char buf[NL_PKT_BUF_SIZE]; | |
2537 | struct rtattr *rta = (void *)buf; | |
2538 | struct rtnexthop *rtnh; | |
2539 | union g_addr *src1 = NULL; | |
2540 | ||
2541 | rta->rta_type = RTA_MULTIPATH; | |
2542 | rta->rta_len = RTA_LENGTH(0); | |
2543 | rtnh = RTA_DATA(rta); | |
2544 | ||
8b1450b9 | 2545 | routedesc = "multipath"; |
d62a17ae | 2546 | _netlink_mpls_debug(cmd, lsp->ile.in_label, routedesc); |
2547 | ||
2548 | nexthop_num = 0; | |
2549 | for (nhlfe = lsp->nhlfe_list; nhlfe; nhlfe = nhlfe->next) { | |
2550 | nexthop = nhlfe->nexthop; | |
2551 | if (!nexthop) | |
2552 | continue; | |
2553 | ||
2554 | if (nexthop_num >= multipath_num) | |
2555 | break; | |
2556 | ||
2557 | if ((cmd == RTM_NEWROUTE | |
2558 | && (CHECK_FLAG(nhlfe->flags, NHLFE_FLAG_SELECTED) | |
2559 | && CHECK_FLAG(nexthop->flags, | |
2560 | NEXTHOP_FLAG_ACTIVE))) | |
2561 | || (cmd == RTM_DELROUTE | |
2562 | && (CHECK_FLAG(nhlfe->flags, | |
2563 | NHLFE_FLAG_INSTALLED) | |
2564 | && CHECK_FLAG(nexthop->flags, | |
2565 | NEXTHOP_FLAG_FIB)))) { | |
2566 | nexthop_num++; | |
2567 | ||
2568 | /* Build the multipath */ | |
2569 | _netlink_mpls_build_multipath(routedesc, nhlfe, | |
2570 | rta, rtnh, &req.r, | |
2571 | &src1); | |
2572 | rtnh = RTNH_NEXT(rtnh); | |
d62a17ae | 2573 | } |
2574 | } | |
2575 | ||
2576 | /* Add the multipath */ | |
2577 | if (rta->rta_len > RTA_LENGTH(0)) | |
2578 | addattr_l(&req.n, NL_PKT_BUF_SIZE, RTA_MULTIPATH, | |
2579 | RTA_DATA(rta), RTA_PAYLOAD(rta)); | |
2580 | } | |
2581 | ||
2582 | /* Talk to netlink socket. */ | |
2583 | return netlink_talk(netlink_talk_filter, &req.n, &zns->netlink_cmd, zns, | |
2584 | 0); | |
40c7bdb0 | 2585 | } |
ddfeb486 | 2586 | #endif /* HAVE_NETLINK */ |