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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) |
d4d71f11 | 97 | || (proto == RTPROT_ZSTATIC) || (proto == RTPROT_ZEBRA) |
d62a17ae | 98 | || (proto == RTPROT_ISIS) || (proto == RTPROT_RIPNG) |
99 | || (proto == RTPROT_NHRP) || (proto == RTPROT_EIGRP) | |
915902cb | 100 | || (proto == RTPROT_LDP) || (proto == RTPROT_BABEL) |
0761368a DS |
101 | || (proto == RTPROT_RIP) || (proto == RTPROT_SHARP) |
102 | || (proto == RTPROT_PBR)) { | |
d62a17ae | 103 | return 1; |
104 | } | |
105 | ||
106 | return 0; | |
23b1f334 DD |
107 | } |
108 | ||
915902cb | 109 | static inline int zebra2proto(int proto) |
23b1f334 | 110 | { |
d62a17ae | 111 | switch (proto) { |
112 | case ZEBRA_ROUTE_BABEL: | |
113 | proto = RTPROT_BABEL; | |
114 | break; | |
115 | case ZEBRA_ROUTE_BGP: | |
116 | proto = RTPROT_BGP; | |
117 | break; | |
118 | case ZEBRA_ROUTE_OSPF: | |
119 | case ZEBRA_ROUTE_OSPF6: | |
120 | proto = RTPROT_OSPF; | |
121 | break; | |
122 | case ZEBRA_ROUTE_STATIC: | |
d4d71f11 | 123 | proto = RTPROT_ZSTATIC; |
d62a17ae | 124 | break; |
125 | case ZEBRA_ROUTE_ISIS: | |
126 | proto = RTPROT_ISIS; | |
127 | break; | |
128 | case ZEBRA_ROUTE_RIP: | |
129 | proto = RTPROT_RIP; | |
130 | break; | |
131 | case ZEBRA_ROUTE_RIPNG: | |
132 | proto = RTPROT_RIPNG; | |
133 | break; | |
134 | case ZEBRA_ROUTE_NHRP: | |
135 | proto = RTPROT_NHRP; | |
136 | break; | |
137 | case ZEBRA_ROUTE_EIGRP: | |
138 | proto = RTPROT_EIGRP; | |
139 | break; | |
140 | case ZEBRA_ROUTE_LDP: | |
141 | proto = RTPROT_LDP; | |
142 | break; | |
8a71d93d DS |
143 | case ZEBRA_ROUTE_SHARP: |
144 | proto = RTPROT_SHARP; | |
145 | break; | |
0761368a DS |
146 | case ZEBRA_ROUTE_PBR: |
147 | proto = RTPROT_PBR; | |
148 | break; | |
d62a17ae | 149 | default: |
0761368a DS |
150 | /* |
151 | * When a user adds a new protocol this will show up | |
152 | * to let them know to do something about it. This | |
153 | * is intentionally a warn because we should see | |
154 | * this as part of development of a new protocol | |
155 | */ | |
156 | zlog_warn("%s: Please add this protocol(%d) to proper rt_netlink.c handling", | |
157 | __PRETTY_FUNCTION__, proto); | |
d62a17ae | 158 | proto = RTPROT_ZEBRA; |
159 | break; | |
160 | } | |
161 | ||
162 | return proto; | |
23b1f334 DD |
163 | } |
164 | ||
915902cb DS |
165 | static inline int proto2zebra(int proto, int family) |
166 | { | |
167 | switch (proto) { | |
168 | case RTPROT_BABEL: | |
169 | proto = ZEBRA_ROUTE_BABEL; | |
170 | break; | |
171 | case RTPROT_BGP: | |
172 | proto = ZEBRA_ROUTE_BGP; | |
173 | break; | |
174 | case RTPROT_OSPF: | |
996c9314 LB |
175 | proto = (family == AFI_IP) ? ZEBRA_ROUTE_OSPF |
176 | : ZEBRA_ROUTE_OSPF6; | |
915902cb DS |
177 | break; |
178 | case RTPROT_ISIS: | |
179 | proto = ZEBRA_ROUTE_ISIS; | |
180 | break; | |
181 | case RTPROT_RIP: | |
182 | proto = ZEBRA_ROUTE_RIP; | |
183 | break; | |
184 | case RTPROT_RIPNG: | |
185 | proto = ZEBRA_ROUTE_RIPNG; | |
186 | break; | |
187 | case RTPROT_NHRP: | |
188 | proto = ZEBRA_ROUTE_NHRP; | |
189 | break; | |
190 | case RTPROT_EIGRP: | |
191 | proto = ZEBRA_ROUTE_EIGRP; | |
192 | break; | |
193 | case RTPROT_LDP: | |
194 | proto = ZEBRA_ROUTE_LDP; | |
195 | break; | |
196 | case RTPROT_STATIC: | |
d4d71f11 | 197 | case RTPROT_ZSTATIC: |
915902cb DS |
198 | proto = ZEBRA_ROUTE_STATIC; |
199 | break; | |
0761368a DS |
200 | case RTPROT_SHARP: |
201 | proto = ZEBRA_ROUTE_SHARP; | |
202 | break; | |
203 | case RTPROT_PBR: | |
204 | proto = ZEBRA_ROUTE_PBR; | |
205 | break; | |
915902cb | 206 | default: |
0761368a DS |
207 | /* |
208 | * When a user adds a new protocol this will show up | |
209 | * to let them know to do something about it. This | |
210 | * is intentionally a warn because we should see | |
211 | * this as part of development of a new protocol | |
212 | */ | |
213 | zlog_warn("%s: Please add this protocol(%d) to proper rt_netlink.c handling", | |
214 | __PRETTY_FUNCTION__, | |
215 | proto); | |
915902cb DS |
216 | proto = ZEBRA_ROUTE_KERNEL; |
217 | break; | |
218 | } | |
219 | return proto; | |
220 | } | |
221 | ||
12f6fb97 DS |
222 | /* |
223 | Pending: create an efficient table_id (in a tree/hash) based lookup) | |
224 | */ | |
d7c0a89a | 225 | static vrf_id_t vrf_lookup_by_table(uint32_t table_id, ns_id_t ns_id) |
12f6fb97 | 226 | { |
d62a17ae | 227 | struct vrf *vrf; |
228 | struct zebra_vrf *zvrf; | |
12f6fb97 | 229 | |
a2addae8 | 230 | RB_FOREACH (vrf, vrf_id_head, &vrfs_by_id) { |
78dd30b2 PG |
231 | zvrf = vrf->info; |
232 | if (zvrf == NULL) | |
d62a17ae | 233 | continue; |
78dd30b2 PG |
234 | /* case vrf with netns : match the netnsid */ |
235 | if (vrf_is_backend_netns()) { | |
236 | if (ns_id == zvrf_id(zvrf)) | |
237 | return zvrf_id(zvrf); | |
238 | } else { | |
239 | /* VRF is VRF_BACKEND_VRF_LITE */ | |
240 | if (zvrf->table_id != table_id) | |
241 | continue; | |
242 | return zvrf_id(zvrf); | |
243 | } | |
d62a17ae | 244 | } |
12f6fb97 | 245 | |
d62a17ae | 246 | return VRF_DEFAULT; |
12f6fb97 DS |
247 | } |
248 | ||
718e3744 | 249 | /* Looking up routing table by netlink interface. */ |
2414abd3 | 250 | static int netlink_route_change_read_unicast(struct nlmsghdr *h, ns_id_t ns_id, |
d62a17ae | 251 | int startup) |
718e3744 | 252 | { |
d62a17ae | 253 | int len; |
254 | struct rtmsg *rtm; | |
255 | struct rtattr *tb[RTA_MAX + 1]; | |
d7c0a89a | 256 | uint8_t flags = 0; |
d62a17ae | 257 | struct prefix p; |
792fa92e | 258 | struct prefix_ipv6 src_p = {}; |
78dd30b2 | 259 | vrf_id_t vrf_id; |
d62a17ae | 260 | |
261 | char anyaddr[16] = {0}; | |
262 | ||
915902cb | 263 | int proto = ZEBRA_ROUTE_KERNEL; |
d62a17ae | 264 | int index = 0; |
265 | int table; | |
266 | int metric = 0; | |
d7c0a89a | 267 | uint32_t mtu = 0; |
25715c7e | 268 | uint8_t distance = 0; |
4e40b6d6 | 269 | route_tag_t tag = 0; |
d62a17ae | 270 | |
271 | void *dest = NULL; | |
272 | void *gate = NULL; | |
273 | void *prefsrc = NULL; /* IPv4 preferred source host address */ | |
274 | void *src = NULL; /* IPv6 srcdest source prefix */ | |
e655a03c | 275 | enum blackhole_type bh_type = BLACKHOLE_UNSPEC; |
d62a17ae | 276 | |
277 | rtm = NLMSG_DATA(h); | |
278 | ||
279 | if (startup && h->nlmsg_type != RTM_NEWROUTE) | |
280 | return 0; | |
e655a03c DL |
281 | switch (rtm->rtm_type) { |
282 | case RTN_UNICAST: | |
283 | break; | |
284 | case RTN_BLACKHOLE: | |
285 | bh_type = BLACKHOLE_NULL; | |
286 | break; | |
287 | case RTN_UNREACHABLE: | |
288 | bh_type = BLACKHOLE_REJECT; | |
289 | break; | |
290 | case RTN_PROHIBIT: | |
291 | bh_type = BLACKHOLE_ADMINPROHIB; | |
292 | break; | |
293 | default: | |
d62a17ae | 294 | return 0; |
e655a03c | 295 | } |
d62a17ae | 296 | |
297 | len = h->nlmsg_len - NLMSG_LENGTH(sizeof(struct rtmsg)); | |
9bdf8618 DS |
298 | if (len < 0) { |
299 | zlog_err("%s: Message received from netlink is of a broken size %d %zu", | |
300 | __PRETTY_FUNCTION__, h->nlmsg_len, | |
301 | (size_t)NLMSG_LENGTH(sizeof(struct rtmsg))); | |
d62a17ae | 302 | return -1; |
9bdf8618 | 303 | } |
d62a17ae | 304 | |
305 | memset(tb, 0, sizeof tb); | |
306 | netlink_parse_rtattr(tb, RTA_MAX, RTM_RTA(rtm), len); | |
307 | ||
308 | if (rtm->rtm_flags & RTM_F_CLONED) | |
309 | return 0; | |
310 | if (rtm->rtm_protocol == RTPROT_REDIRECT) | |
311 | return 0; | |
312 | if (rtm->rtm_protocol == RTPROT_KERNEL) | |
313 | return 0; | |
314 | ||
315 | if (!startup && is_selfroute(rtm->rtm_protocol) | |
6ab5222f DS |
316 | && h->nlmsg_type == RTM_NEWROUTE) { |
317 | if (IS_ZEBRA_DEBUG_KERNEL) | |
318 | zlog_debug("Route type: %d Received that we think we have originated, ignoring", | |
319 | rtm->rtm_protocol); | |
d62a17ae | 320 | return 0; |
6ab5222f | 321 | } |
d62a17ae | 322 | |
323 | /* We don't care about change notifications for the MPLS table. */ | |
324 | /* TODO: Revisit this. */ | |
325 | if (rtm->rtm_family == AF_MPLS) | |
326 | return 0; | |
327 | ||
328 | /* Table corresponding to route. */ | |
329 | if (tb[RTA_TABLE]) | |
330 | table = *(int *)RTA_DATA(tb[RTA_TABLE]); | |
331 | else | |
332 | table = rtm->rtm_table; | |
333 | ||
334 | /* Map to VRF */ | |
78dd30b2 | 335 | vrf_id = vrf_lookup_by_table(table, ns_id); |
d62a17ae | 336 | if (vrf_id == VRF_DEFAULT) { |
337 | if (!is_zebra_valid_kernel_table(table) | |
338 | && !is_zebra_main_routing_table(table)) | |
339 | return 0; | |
340 | } | |
341 | ||
342 | /* Route which inserted by Zebra. */ | |
915902cb | 343 | if (is_selfroute(rtm->rtm_protocol)) { |
d62a17ae | 344 | flags |= ZEBRA_FLAG_SELFROUTE; |
915902cb DS |
345 | proto = proto2zebra(rtm->rtm_protocol, rtm->rtm_family); |
346 | } | |
d62a17ae | 347 | if (tb[RTA_OIF]) |
348 | index = *(int *)RTA_DATA(tb[RTA_OIF]); | |
349 | ||
350 | if (tb[RTA_DST]) | |
351 | dest = RTA_DATA(tb[RTA_DST]); | |
352 | else | |
353 | dest = anyaddr; | |
354 | ||
355 | if (tb[RTA_SRC]) | |
356 | src = RTA_DATA(tb[RTA_SRC]); | |
357 | else | |
358 | src = anyaddr; | |
359 | ||
360 | if (tb[RTA_PREFSRC]) | |
361 | prefsrc = RTA_DATA(tb[RTA_PREFSRC]); | |
362 | ||
363 | if (tb[RTA_GATEWAY]) | |
364 | gate = RTA_DATA(tb[RTA_GATEWAY]); | |
365 | ||
f19435a8 DS |
366 | if (tb[RTA_PRIORITY]) |
367 | metric = *(int *)RTA_DATA(tb[RTA_PRIORITY]); | |
d62a17ae | 368 | |
4e40b6d6 KK |
369 | #if defined(SUPPORT_REALMS) |
370 | if (tb[RTA_FLOW]) | |
371 | tag = *(uint32_t *)RTA_DATA(tb[RTA_FLOW]); | |
372 | #endif | |
373 | ||
f19435a8 DS |
374 | if (tb[RTA_METRICS]) { |
375 | struct rtattr *mxrta[RTAX_MAX + 1]; | |
d62a17ae | 376 | |
f19435a8 | 377 | memset(mxrta, 0, sizeof mxrta); |
996c9314 | 378 | netlink_parse_rtattr(mxrta, RTAX_MAX, RTA_DATA(tb[RTA_METRICS]), |
f19435a8 | 379 | RTA_PAYLOAD(tb[RTA_METRICS])); |
d62a17ae | 380 | |
f19435a8 | 381 | if (mxrta[RTAX_MTU]) |
d7c0a89a | 382 | mtu = *(uint32_t *)RTA_DATA(mxrta[RTAX_MTU]); |
d62a17ae | 383 | } |
384 | ||
385 | if (rtm->rtm_family == AF_INET) { | |
386 | p.family = AF_INET; | |
387 | memcpy(&p.u.prefix4, dest, 4); | |
388 | p.prefixlen = rtm->rtm_dst_len; | |
389 | ||
390 | src_p.prefixlen = | |
391 | 0; // Forces debug below to not display anything | |
392 | } else if (rtm->rtm_family == AF_INET6) { | |
393 | p.family = AF_INET6; | |
394 | memcpy(&p.u.prefix6, dest, 16); | |
395 | p.prefixlen = rtm->rtm_dst_len; | |
396 | ||
397 | src_p.family = AF_INET6; | |
398 | memcpy(&src_p.prefix, src, 16); | |
399 | src_p.prefixlen = rtm->rtm_src_len; | |
400 | } | |
401 | ||
402 | if (rtm->rtm_src_len != 0) { | |
403 | char buf[PREFIX_STRLEN]; | |
404 | zlog_warn( | |
405 | "unsupported IPv[4|6] sourcedest route (dest %s vrf %u)", | |
406 | prefix2str(&p, buf, sizeof(buf)), vrf_id); | |
407 | return 0; | |
408 | } | |
409 | ||
25715c7e DS |
410 | /* |
411 | * For ZEBRA_ROUTE_KERNEL types: | |
412 | * | |
413 | * The metric/priority of the route received from the kernel | |
414 | * is a 32 bit number. We are going to interpret the high | |
415 | * order byte as the Admin Distance and the low order 3 bytes | |
416 | * as the metric. | |
417 | * | |
418 | * This will allow us to do two things: | |
419 | * 1) Allow the creation of kernel routes that can be | |
420 | * overridden by zebra. | |
421 | * 2) Allow the old behavior for 'most' kernel route types | |
422 | * if a user enters 'ip route ...' v4 routes get a metric | |
423 | * of 0 and v6 routes get a metric of 1024. Both of these | |
424 | * values will end up with a admin distance of 0, which | |
425 | * will cause them to win for the purposes of zebra. | |
426 | */ | |
427 | if (proto == ZEBRA_ROUTE_KERNEL) { | |
428 | distance = (metric >> 24) & 0xFF; | |
996c9314 | 429 | metric = (metric & 0x00FFFFFF); |
25715c7e DS |
430 | } |
431 | ||
d62a17ae | 432 | if (IS_ZEBRA_DEBUG_KERNEL) { |
433 | char buf[PREFIX_STRLEN]; | |
434 | char buf2[PREFIX_STRLEN]; | |
45df4e96 | 435 | zlog_debug("%s %s%s%s vrf %u(%u) metric: %d Admin Distance: %d", |
996c9314 LB |
436 | nl_msg_type_to_str(h->nlmsg_type), |
437 | prefix2str(&p, buf, sizeof(buf)), | |
438 | src_p.prefixlen ? " from " : "", | |
439 | src_p.prefixlen | |
440 | ? prefix2str(&src_p, buf2, sizeof(buf2)) | |
441 | : "", | |
45df4e96 | 442 | vrf_id, table, metric, distance); |
d62a17ae | 443 | } |
444 | ||
445 | afi_t afi = AFI_IP; | |
446 | if (rtm->rtm_family == AF_INET6) | |
447 | afi = AFI_IP6; | |
448 | ||
449 | if (h->nlmsg_type == RTM_NEWROUTE) { | |
8795f904 DS |
450 | struct interface *ifp; |
451 | vrf_id_t nh_vrf_id = vrf_id; | |
452 | ||
fd36be7e DL |
453 | if (!tb[RTA_MULTIPATH]) { |
454 | struct nexthop nh; | |
455 | size_t sz = (afi == AFI_IP) ? 4 : 16; | |
456 | ||
457 | memset(&nh, 0, sizeof(nh)); | |
af760ec1 DS |
458 | |
459 | if (bh_type == BLACKHOLE_UNSPEC) { | |
460 | if (index && !gate) | |
461 | nh.type = NEXTHOP_TYPE_IFINDEX; | |
462 | else if (index && gate) | |
996c9314 LB |
463 | nh.type = |
464 | (afi == AFI_IP) | |
465 | ? NEXTHOP_TYPE_IPV4_IFINDEX | |
466 | : NEXTHOP_TYPE_IPV6_IFINDEX; | |
af760ec1 | 467 | else if (!index && gate) |
1dca2eaa RW |
468 | nh.type = (afi == AFI_IP) |
469 | ? NEXTHOP_TYPE_IPV4 | |
470 | : NEXTHOP_TYPE_IPV6; | |
af760ec1 DS |
471 | else { |
472 | nh.type = NEXTHOP_TYPE_BLACKHOLE; | |
473 | nh.bh_type = bh_type; | |
474 | } | |
475 | } else { | |
fd36be7e | 476 | nh.type = NEXTHOP_TYPE_BLACKHOLE; |
e655a03c DL |
477 | nh.bh_type = bh_type; |
478 | } | |
fd36be7e DL |
479 | nh.ifindex = index; |
480 | if (prefsrc) | |
481 | memcpy(&nh.src, prefsrc, sz); | |
482 | if (gate) | |
483 | memcpy(&nh.gate, gate, sz); | |
915902cb | 484 | |
8795f904 | 485 | if (index) { |
996c9314 | 486 | ifp = if_lookup_by_index(index, VRF_UNKNOWN); |
8795f904 DS |
487 | if (ifp) |
488 | nh_vrf_id = ifp->vrf_id; | |
489 | } | |
4a7371e9 | 490 | nh.vrf_id = nh_vrf_id; |
8795f904 | 491 | |
4a7371e9 DS |
492 | rib_add(afi, SAFI_UNICAST, vrf_id, proto, 0, flags, &p, |
493 | NULL, &nh, table, metric, mtu, distance, tag); | |
fd36be7e | 494 | } else { |
d62a17ae | 495 | /* This is a multipath route */ |
496 | ||
497 | struct route_entry *re; | |
498 | struct rtnexthop *rtnh = | |
499 | (struct rtnexthop *)RTA_DATA(tb[RTA_MULTIPATH]); | |
500 | ||
501 | len = RTA_PAYLOAD(tb[RTA_MULTIPATH]); | |
502 | ||
503 | re = XCALLOC(MTYPE_RE, sizeof(struct route_entry)); | |
915902cb | 504 | re->type = proto; |
25715c7e | 505 | re->distance = distance; |
d62a17ae | 506 | re->flags = flags; |
507 | re->metric = metric; | |
508 | re->mtu = mtu; | |
509 | re->vrf_id = vrf_id; | |
510 | re->table = table; | |
511 | re->nexthop_num = 0; | |
512 | re->uptime = time(NULL); | |
4e40b6d6 | 513 | re->tag = tag; |
d62a17ae | 514 | |
515 | for (;;) { | |
4a7371e9 | 516 | vrf_id_t nh_vrf_id; |
d62a17ae | 517 | if (len < (int)sizeof(*rtnh) |
518 | || rtnh->rtnh_len > len) | |
519 | break; | |
520 | ||
521 | index = rtnh->rtnh_ifindex; | |
8795f904 DS |
522 | if (index) { |
523 | /* | |
524 | * Yes we are looking this up | |
525 | * for every nexthop and just | |
526 | * using the last one looked | |
527 | * up right now | |
528 | */ | |
529 | ifp = if_lookup_by_index(index, | |
530 | VRF_UNKNOWN); | |
531 | if (ifp) | |
4a7371e9 DS |
532 | nh_vrf_id = ifp->vrf_id; |
533 | else { | |
534 | zlog_warn( | |
535 | "%s: Unknown interface %u specified, defaulting to VRF_DEFAULT", | |
536 | __PRETTY_FUNCTION__, | |
537 | index); | |
538 | nh_vrf_id = VRF_DEFAULT; | |
539 | } | |
540 | } else | |
541 | nh_vrf_id = vrf_id; | |
542 | ||
d62a17ae | 543 | gate = 0; |
544 | if (rtnh->rtnh_len > sizeof(*rtnh)) { | |
545 | memset(tb, 0, sizeof(tb)); | |
546 | netlink_parse_rtattr( | |
547 | tb, RTA_MAX, RTNH_DATA(rtnh), | |
548 | rtnh->rtnh_len - sizeof(*rtnh)); | |
549 | if (tb[RTA_GATEWAY]) | |
550 | gate = RTA_DATA( | |
551 | tb[RTA_GATEWAY]); | |
552 | } | |
553 | ||
554 | if (gate) { | |
555 | if (rtm->rtm_family == AF_INET) { | |
556 | if (index) | |
557 | route_entry_nexthop_ipv4_ifindex_add( | |
558 | re, gate, | |
4a7371e9 DS |
559 | prefsrc, index, |
560 | nh_vrf_id); | |
d62a17ae | 561 | else |
562 | route_entry_nexthop_ipv4_add( | |
563 | re, gate, | |
4a7371e9 DS |
564 | prefsrc, |
565 | nh_vrf_id); | |
d62a17ae | 566 | } else if (rtm->rtm_family |
567 | == AF_INET6) { | |
568 | if (index) | |
569 | route_entry_nexthop_ipv6_ifindex_add( | |
4a7371e9 DS |
570 | re, gate, index, |
571 | nh_vrf_id); | |
d62a17ae | 572 | else |
573 | route_entry_nexthop_ipv6_add( | |
4a7371e9 DS |
574 | re, gate, |
575 | nh_vrf_id); | |
d62a17ae | 576 | } |
577 | } else | |
4a7371e9 DS |
578 | route_entry_nexthop_ifindex_add( |
579 | re, index, nh_vrf_id); | |
d62a17ae | 580 | |
581 | len -= NLMSG_ALIGN(rtnh->rtnh_len); | |
582 | rtnh = RTNH_NEXT(rtnh); | |
583 | } | |
584 | ||
585 | zserv_nexthop_num_warn(__func__, | |
586 | (const struct prefix *)&p, | |
587 | re->nexthop_num); | |
588 | if (re->nexthop_num == 0) | |
589 | XFREE(MTYPE_RE, re); | |
590 | else | |
996c9314 LB |
591 | rib_add_multipath(afi, SAFI_UNICAST, &p, NULL, |
592 | re); | |
d62a17ae | 593 | } |
594 | } else { | |
fd36be7e DL |
595 | if (!tb[RTA_MULTIPATH]) { |
596 | struct nexthop nh; | |
597 | size_t sz = (afi == AFI_IP) ? 4 : 16; | |
598 | ||
599 | memset(&nh, 0, sizeof(nh)); | |
8ba5bd58 RW |
600 | if (bh_type == BLACKHOLE_UNSPEC) { |
601 | if (index && !gate) | |
602 | nh.type = NEXTHOP_TYPE_IFINDEX; | |
603 | else if (index && gate) | |
604 | nh.type = | |
605 | (afi == AFI_IP) | |
606 | ? NEXTHOP_TYPE_IPV4_IFINDEX | |
607 | : NEXTHOP_TYPE_IPV6_IFINDEX; | |
608 | else if (!index && gate) | |
609 | nh.type = (afi == AFI_IP) | |
610 | ? NEXTHOP_TYPE_IPV4 | |
60466a63 | 611 | : NEXTHOP_TYPE_IPV6; |
8ba5bd58 RW |
612 | else { |
613 | nh.type = NEXTHOP_TYPE_BLACKHOLE; | |
614 | nh.bh_type = BLACKHOLE_UNSPEC; | |
615 | } | |
616 | } else { | |
fd36be7e | 617 | nh.type = NEXTHOP_TYPE_BLACKHOLE; |
8ba5bd58 RW |
618 | nh.bh_type = bh_type; |
619 | } | |
fd36be7e DL |
620 | nh.ifindex = index; |
621 | if (gate) | |
622 | memcpy(&nh.gate, gate, sz); | |
996c9314 | 623 | rib_delete(afi, SAFI_UNICAST, vrf_id, proto, 0, flags, |
22e63104 | 624 | &p, NULL, &nh, table, metric, true); |
fd36be7e DL |
625 | } else { |
626 | /* XXX: need to compare the entire list of nexthops | |
627 | * here for NLM_F_APPEND stupidity */ | |
996c9314 | 628 | rib_delete(afi, SAFI_UNICAST, vrf_id, proto, 0, flags, |
22e63104 | 629 | &p, NULL, NULL, table, metric, true); |
d62a17ae | 630 | } |
631 | } | |
632 | ||
633 | return 0; | |
718e3744 | 634 | } |
635 | ||
e3be0432 DS |
636 | static struct mcast_route_data *mroute = NULL; |
637 | ||
2414abd3 | 638 | static int netlink_route_change_read_multicast(struct nlmsghdr *h, |
d62a17ae | 639 | ns_id_t ns_id, int startup) |
565fdc75 | 640 | { |
d62a17ae | 641 | int len; |
642 | struct rtmsg *rtm; | |
643 | struct rtattr *tb[RTA_MAX + 1]; | |
644 | struct mcast_route_data *m; | |
645 | struct mcast_route_data mr; | |
646 | int iif = 0; | |
647 | int count; | |
648 | int oif[256]; | |
649 | int oif_count = 0; | |
650 | char sbuf[40]; | |
651 | char gbuf[40]; | |
652 | char oif_list[256] = "\0"; | |
78dd30b2 | 653 | vrf_id_t vrf; |
43b5cc5e | 654 | int table; |
d62a17ae | 655 | |
656 | if (mroute) | |
657 | m = mroute; | |
658 | else { | |
659 | memset(&mr, 0, sizeof(mr)); | |
660 | m = &mr; | |
661 | } | |
662 | ||
663 | rtm = NLMSG_DATA(h); | |
664 | ||
665 | len = h->nlmsg_len - NLMSG_LENGTH(sizeof(struct rtmsg)); | |
666 | ||
667 | memset(tb, 0, sizeof tb); | |
668 | netlink_parse_rtattr(tb, RTA_MAX, RTM_RTA(rtm), len); | |
90d82769 | 669 | |
43b5cc5e DS |
670 | if (tb[RTA_TABLE]) |
671 | table = *(int *)RTA_DATA(tb[RTA_TABLE]); | |
672 | else | |
673 | table = rtm->rtm_table; | |
674 | ||
78dd30b2 | 675 | vrf = vrf_lookup_by_table(table, ns_id); |
43b5cc5e | 676 | |
d62a17ae | 677 | if (tb[RTA_IIF]) |
678 | iif = *(int *)RTA_DATA(tb[RTA_IIF]); | |
679 | ||
680 | if (tb[RTA_SRC]) | |
bd8b9272 | 681 | m->sg.src = *(struct in_addr *)RTA_DATA(tb[RTA_SRC]); |
d62a17ae | 682 | |
683 | if (tb[RTA_DST]) | |
bd8b9272 | 684 | m->sg.grp = *(struct in_addr *)RTA_DATA(tb[RTA_DST]); |
d62a17ae | 685 | |
686 | if ((RTA_EXPIRES <= RTA_MAX) && tb[RTA_EXPIRES]) | |
687 | m->lastused = *(unsigned long long *)RTA_DATA(tb[RTA_EXPIRES]); | |
688 | ||
689 | if (tb[RTA_MULTIPATH]) { | |
690 | struct rtnexthop *rtnh = | |
691 | (struct rtnexthop *)RTA_DATA(tb[RTA_MULTIPATH]); | |
692 | ||
693 | len = RTA_PAYLOAD(tb[RTA_MULTIPATH]); | |
694 | for (;;) { | |
695 | if (len < (int)sizeof(*rtnh) || rtnh->rtnh_len > len) | |
696 | break; | |
697 | ||
698 | oif[oif_count] = rtnh->rtnh_ifindex; | |
699 | oif_count++; | |
700 | ||
701 | len -= NLMSG_ALIGN(rtnh->rtnh_len); | |
702 | rtnh = RTNH_NEXT(rtnh); | |
703 | } | |
704 | } | |
705 | ||
706 | if (IS_ZEBRA_DEBUG_KERNEL) { | |
707 | struct interface *ifp; | |
0af35d90 RW |
708 | strlcpy(sbuf, inet_ntoa(m->sg.src), sizeof(sbuf)); |
709 | strlcpy(gbuf, inet_ntoa(m->sg.grp), sizeof(gbuf)); | |
d62a17ae | 710 | for (count = 0; count < oif_count; count++) { |
711 | ifp = if_lookup_by_index(oif[count], vrf); | |
712 | char temp[256]; | |
713 | ||
714 | sprintf(temp, "%s ", ifp->name); | |
715 | strcat(oif_list, temp); | |
716 | } | |
43b5cc5e | 717 | struct zebra_vrf *zvrf = zebra_vrf_lookup_by_id(vrf); |
d62a17ae | 718 | ifp = if_lookup_by_index(iif, vrf); |
43b5cc5e DS |
719 | zlog_debug( |
720 | "MCAST VRF: %s(%d) %s (%s,%s) IIF: %s OIF: %s jiffies: %lld", | |
721 | zvrf->vrf->name, vrf, nl_msg_type_to_str(h->nlmsg_type), | |
722 | sbuf, gbuf, ifp->name, oif_list, m->lastused); | |
90d82769 | 723 | } |
d62a17ae | 724 | return 0; |
565fdc75 DS |
725 | } |
726 | ||
2414abd3 | 727 | int netlink_route_change(struct nlmsghdr *h, ns_id_t ns_id, int startup) |
565fdc75 | 728 | { |
d62a17ae | 729 | int len; |
d62a17ae | 730 | struct rtmsg *rtm; |
731 | ||
732 | rtm = NLMSG_DATA(h); | |
733 | ||
734 | if (!(h->nlmsg_type == RTM_NEWROUTE || h->nlmsg_type == RTM_DELROUTE)) { | |
735 | /* If this is not route add/delete message print warning. */ | |
78dd30b2 | 736 | zlog_warn("Kernel message: %d NS %u\n", h->nlmsg_type, ns_id); |
d62a17ae | 737 | return 0; |
738 | } | |
739 | ||
740 | /* Connected route. */ | |
741 | if (IS_ZEBRA_DEBUG_KERNEL) | |
78dd30b2 | 742 | zlog_debug("%s %s %s proto %s NS %u", |
d62a17ae | 743 | nl_msg_type_to_str(h->nlmsg_type), |
744 | nl_family_to_str(rtm->rtm_family), | |
745 | nl_rttype_to_str(rtm->rtm_type), | |
78dd30b2 | 746 | nl_rtproto_to_str(rtm->rtm_protocol), ns_id); |
d62a17ae | 747 | |
748 | /* We don't care about change notifications for the MPLS table. */ | |
749 | /* TODO: Revisit this. */ | |
750 | if (rtm->rtm_family == AF_MPLS) | |
751 | return 0; | |
752 | ||
753 | len = h->nlmsg_len - NLMSG_LENGTH(sizeof(struct rtmsg)); | |
9bdf8618 DS |
754 | if (len < 0) { |
755 | zlog_err("%s: Message received from netlink is of a broken size: %d %zu", | |
756 | __PRETTY_FUNCTION__, | |
757 | h->nlmsg_len, | |
758 | (size_t)NLMSG_LENGTH(sizeof(struct rtmsg))); | |
d62a17ae | 759 | return -1; |
9bdf8618 | 760 | } |
d62a17ae | 761 | |
e655a03c | 762 | if (rtm->rtm_type == RTN_MULTICAST) |
2414abd3 | 763 | netlink_route_change_read_multicast(h, ns_id, startup); |
e655a03c | 764 | else |
2414abd3 | 765 | netlink_route_change_read_unicast(h, ns_id, startup); |
d62a17ae | 766 | return 0; |
565fdc75 DS |
767 | } |
768 | ||
289602d7 | 769 | /* Request for specific route information from the kernel */ |
d62a17ae | 770 | static int netlink_request_route(struct zebra_ns *zns, int family, int type) |
289602d7 | 771 | { |
d62a17ae | 772 | struct { |
773 | struct nlmsghdr n; | |
774 | struct rtmsg rtm; | |
775 | } req; | |
776 | ||
777 | /* Form the request, specifying filter (rtattr) if needed. */ | |
778 | memset(&req, 0, sizeof(req)); | |
779 | req.n.nlmsg_type = type; | |
780 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)); | |
781 | req.rtm.rtm_family = family; | |
782 | ||
783 | return netlink_request(&zns->netlink_cmd, &req.n); | |
289602d7 | 784 | } |
785 | ||
718e3744 | 786 | /* Routing table read function using netlink interface. Only called |
787 | bootstrap time. */ | |
d62a17ae | 788 | int netlink_route_read(struct zebra_ns *zns) |
718e3744 | 789 | { |
d62a17ae | 790 | int ret; |
791 | ||
792 | /* Get IPv4 routing table. */ | |
793 | ret = netlink_request_route(zns, AF_INET, RTM_GETROUTE); | |
794 | if (ret < 0) | |
795 | return ret; | |
796 | ret = netlink_parse_info(netlink_route_change_read_unicast, | |
797 | &zns->netlink_cmd, zns, 0, 1); | |
798 | if (ret < 0) | |
799 | return ret; | |
800 | ||
801 | /* Get IPv6 routing table. */ | |
802 | ret = netlink_request_route(zns, AF_INET6, RTM_GETROUTE); | |
803 | if (ret < 0) | |
804 | return ret; | |
805 | ret = netlink_parse_info(netlink_route_change_read_unicast, | |
806 | &zns->netlink_cmd, zns, 0, 1); | |
807 | if (ret < 0) | |
808 | return ret; | |
809 | ||
810 | return 0; | |
718e3744 | 811 | } |
812 | ||
d7c0a89a QY |
813 | static void _netlink_route_nl_add_gateway_info(uint8_t route_family, |
814 | uint8_t gw_family, | |
d62a17ae | 815 | struct nlmsghdr *nlmsg, |
816 | size_t req_size, int bytelen, | |
817 | struct nexthop *nexthop) | |
40c7bdb0 | 818 | { |
d62a17ae | 819 | if (route_family == AF_MPLS) { |
820 | struct gw_family_t gw_fam; | |
821 | ||
822 | gw_fam.family = gw_family; | |
823 | if (gw_family == AF_INET) | |
824 | memcpy(&gw_fam.gate.ipv4, &nexthop->gate.ipv4, bytelen); | |
825 | else | |
826 | memcpy(&gw_fam.gate.ipv6, &nexthop->gate.ipv6, bytelen); | |
827 | addattr_l(nlmsg, req_size, RTA_VIA, &gw_fam.family, | |
828 | bytelen + 2); | |
829 | } else { | |
830 | if (gw_family == AF_INET) | |
831 | addattr_l(nlmsg, req_size, RTA_GATEWAY, | |
832 | &nexthop->gate.ipv4, bytelen); | |
833 | else | |
834 | addattr_l(nlmsg, req_size, RTA_GATEWAY, | |
835 | &nexthop->gate.ipv6, bytelen); | |
836 | } | |
40c7bdb0 | 837 | } |
838 | ||
d7c0a89a QY |
839 | static void _netlink_route_rta_add_gateway_info(uint8_t route_family, |
840 | uint8_t gw_family, | |
d62a17ae | 841 | struct rtattr *rta, |
842 | struct rtnexthop *rtnh, | |
843 | size_t req_size, int bytelen, | |
844 | struct nexthop *nexthop) | |
40c7bdb0 | 845 | { |
d62a17ae | 846 | if (route_family == AF_MPLS) { |
847 | struct gw_family_t gw_fam; | |
848 | ||
849 | gw_fam.family = gw_family; | |
850 | if (gw_family == AF_INET) | |
851 | memcpy(&gw_fam.gate.ipv4, &nexthop->gate.ipv4, bytelen); | |
852 | else | |
853 | memcpy(&gw_fam.gate.ipv6, &nexthop->gate.ipv6, bytelen); | |
854 | rta_addattr_l(rta, req_size, RTA_VIA, &gw_fam.family, | |
855 | bytelen + 2); | |
856 | rtnh->rtnh_len += RTA_LENGTH(bytelen + 2); | |
857 | } else { | |
858 | if (gw_family == AF_INET) | |
859 | rta_addattr_l(rta, req_size, RTA_GATEWAY, | |
860 | &nexthop->gate.ipv4, bytelen); | |
861 | else | |
862 | rta_addattr_l(rta, req_size, RTA_GATEWAY, | |
863 | &nexthop->gate.ipv6, bytelen); | |
864 | rtnh->rtnh_len += sizeof(struct rtattr) + bytelen; | |
865 | } | |
40c7bdb0 | 866 | } |
867 | ||
fa713d9e CF |
868 | /* This function takes a nexthop as argument and adds |
869 | * the appropriate netlink attributes to an existing | |
870 | * netlink message. | |
871 | * | |
872 | * @param routedesc: Human readable description of route type | |
873 | * (direct/recursive, single-/multipath) | |
874 | * @param bytelen: Length of addresses in bytes. | |
875 | * @param nexthop: Nexthop information | |
876 | * @param nlmsg: nlmsghdr structure to fill in. | |
877 | * @param req_size: The size allocated for the message. | |
878 | */ | |
d62a17ae | 879 | static void _netlink_route_build_singlepath(const char *routedesc, int bytelen, |
880 | struct nexthop *nexthop, | |
881 | struct nlmsghdr *nlmsg, | |
882 | struct rtmsg *rtmsg, | |
883 | size_t req_size, int cmd) | |
fa713d9e | 884 | { |
8ecdb26e | 885 | struct mpls_label_stack *nh_label; |
d62a17ae | 886 | mpls_lse_t out_lse[MPLS_MAX_LABELS]; |
fa712963 | 887 | int num_labels = 0; |
9a62e84b | 888 | char label_buf[256]; |
d62a17ae | 889 | |
890 | /* | |
891 | * label_buf is *only* currently used within debugging. | |
892 | * As such when we assign it we are guarding it inside | |
893 | * a debug test. If you want to change this make sure | |
894 | * you fix this assumption | |
895 | */ | |
896 | label_buf[0] = '\0'; | |
d62a17ae | 897 | |
fa712963 RW |
898 | assert(nexthop); |
899 | for (struct nexthop *nh = nexthop; nh; nh = nh->rparent) { | |
d62a17ae | 900 | char label_buf1[20]; |
901 | ||
fa712963 RW |
902 | nh_label = nh->nh_label; |
903 | if (!nh_label || !nh_label->num_labels) | |
904 | continue; | |
905 | ||
906 | for (int i = 0; i < nh_label->num_labels; i++) { | |
907 | if (nh_label->label[i] == MPLS_LABEL_IMPLICIT_NULL) | |
908 | continue; | |
909 | ||
910 | if (IS_ZEBRA_DEBUG_KERNEL) { | |
911 | if (!num_labels) | |
912 | sprintf(label_buf, "label %u", | |
913 | nh_label->label[i]); | |
914 | else { | |
915 | sprintf(label_buf1, "/%u", | |
916 | nh_label->label[i]); | |
917 | strlcat(label_buf, label_buf1, | |
918 | sizeof(label_buf)); | |
d62a17ae | 919 | } |
d62a17ae | 920 | } |
fa712963 RW |
921 | |
922 | out_lse[num_labels] = | |
923 | mpls_lse_encode(nh_label->label[i], 0, 0, 0); | |
924 | num_labels++; | |
d62a17ae | 925 | } |
fa712963 RW |
926 | } |
927 | ||
928 | if (num_labels) { | |
929 | /* Set the BoS bit */ | |
930 | out_lse[num_labels - 1] |= htonl(1 << MPLS_LS_S_SHIFT); | |
931 | ||
932 | if (rtmsg->rtm_family == AF_MPLS) | |
933 | addattr_l(nlmsg, req_size, RTA_NEWDST, &out_lse, | |
934 | num_labels * sizeof(mpls_lse_t)); | |
935 | else { | |
936 | struct rtattr *nest; | |
d7c0a89a | 937 | uint16_t encap = LWTUNNEL_ENCAP_MPLS; |
fa712963 RW |
938 | |
939 | addattr_l(nlmsg, req_size, RTA_ENCAP_TYPE, &encap, | |
d7c0a89a | 940 | sizeof(uint16_t)); |
fa712963 RW |
941 | nest = addattr_nest(nlmsg, req_size, RTA_ENCAP); |
942 | addattr_l(nlmsg, req_size, MPLS_IPTUNNEL_DST, &out_lse, | |
943 | num_labels * sizeof(mpls_lse_t)); | |
944 | addattr_nest_end(nlmsg, nest); | |
66d42727 | 945 | } |
0aabccc0 | 946 | } |
fa713d9e | 947 | |
d62a17ae | 948 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ONLINK)) |
949 | rtmsg->rtm_flags |= RTNH_F_ONLINK; | |
950 | ||
951 | if (rtmsg->rtm_family == AF_INET | |
952 | && (nexthop->type == NEXTHOP_TYPE_IPV6 | |
953 | || nexthop->type == NEXTHOP_TYPE_IPV6_IFINDEX)) { | |
954 | rtmsg->rtm_flags |= RTNH_F_ONLINK; | |
955 | addattr_l(nlmsg, req_size, RTA_GATEWAY, &ipv4_ll, 4); | |
956 | addattr32(nlmsg, req_size, RTA_OIF, nexthop->ifindex); | |
957 | ||
958 | if (nexthop->rmap_src.ipv4.s_addr && (cmd == RTM_NEWROUTE)) | |
959 | addattr_l(nlmsg, req_size, RTA_PREFSRC, | |
960 | &nexthop->rmap_src.ipv4, bytelen); | |
961 | else if (nexthop->src.ipv4.s_addr && (cmd == RTM_NEWROUTE)) | |
962 | addattr_l(nlmsg, req_size, RTA_PREFSRC, | |
963 | &nexthop->src.ipv4, bytelen); | |
964 | ||
965 | if (IS_ZEBRA_DEBUG_KERNEL) | |
966 | zlog_debug( | |
967 | " 5549: _netlink_route_build_singlepath() (%s): " | |
7556c3fd | 968 | "nexthop via %s %s if %u(%u)", |
d62a17ae | 969 | routedesc, ipv4_ll_buf, label_buf, |
7556c3fd | 970 | nexthop->ifindex, nexthop->vrf_id); |
d62a17ae | 971 | return; |
0aabccc0 DD |
972 | } |
973 | ||
d62a17ae | 974 | if (nexthop->type == NEXTHOP_TYPE_IPV4 |
975 | || nexthop->type == NEXTHOP_TYPE_IPV4_IFINDEX) { | |
976 | /* Send deletes to the kernel without specifying the next-hop */ | |
977 | if (cmd != RTM_DELROUTE) | |
978 | _netlink_route_nl_add_gateway_info( | |
979 | rtmsg->rtm_family, AF_INET, nlmsg, req_size, | |
980 | bytelen, nexthop); | |
981 | ||
982 | if (cmd == RTM_NEWROUTE) { | |
983 | if (nexthop->rmap_src.ipv4.s_addr) | |
984 | addattr_l(nlmsg, req_size, RTA_PREFSRC, | |
985 | &nexthop->rmap_src.ipv4, bytelen); | |
986 | else if (nexthop->src.ipv4.s_addr) | |
987 | addattr_l(nlmsg, req_size, RTA_PREFSRC, | |
988 | &nexthop->src.ipv4, bytelen); | |
989 | } | |
990 | ||
991 | if (IS_ZEBRA_DEBUG_KERNEL) | |
992 | zlog_debug( | |
993 | "netlink_route_multipath() (%s): " | |
7556c3fd | 994 | "nexthop via %s %s if %u(%u)", |
d62a17ae | 995 | routedesc, inet_ntoa(nexthop->gate.ipv4), |
7556c3fd | 996 | label_buf, nexthop->ifindex, nexthop->vrf_id); |
0aabccc0 | 997 | } |
fa713d9e | 998 | |
d62a17ae | 999 | if (nexthop->type == NEXTHOP_TYPE_IPV6 |
1000 | || nexthop->type == NEXTHOP_TYPE_IPV6_IFINDEX) { | |
1001 | _netlink_route_nl_add_gateway_info(rtmsg->rtm_family, AF_INET6, | |
1002 | nlmsg, req_size, bytelen, | |
1003 | nexthop); | |
1004 | ||
1005 | if (cmd == RTM_NEWROUTE) { | |
1006 | if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->rmap_src.ipv6)) | |
1007 | addattr_l(nlmsg, req_size, RTA_PREFSRC, | |
1008 | &nexthop->rmap_src.ipv6, bytelen); | |
1009 | else if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->src.ipv6)) | |
1010 | addattr_l(nlmsg, req_size, RTA_PREFSRC, | |
1011 | &nexthop->src.ipv6, bytelen); | |
1012 | } | |
fa713d9e | 1013 | |
d62a17ae | 1014 | if (IS_ZEBRA_DEBUG_KERNEL) |
1015 | zlog_debug( | |
1016 | "netlink_route_multipath() (%s): " | |
7556c3fd | 1017 | "nexthop via %s %s if %u(%u)", |
d62a17ae | 1018 | routedesc, inet6_ntoa(nexthop->gate.ipv6), |
7556c3fd | 1019 | label_buf, nexthop->ifindex, nexthop->vrf_id); |
d62a17ae | 1020 | } |
5e210522 DS |
1021 | |
1022 | /* | |
1023 | * We have the ifindex so we should always send it | |
1024 | * This is especially useful if we are doing route | |
1025 | * leaking. | |
1026 | */ | |
1027 | if (nexthop->type != NEXTHOP_TYPE_BLACKHOLE) | |
d62a17ae | 1028 | addattr32(nlmsg, req_size, RTA_OIF, nexthop->ifindex); |
1029 | ||
5e210522 DS |
1030 | if (nexthop->type == NEXTHOP_TYPE_IFINDEX |
1031 | || nexthop->type == NEXTHOP_TYPE_IPV4_IFINDEX) { | |
d62a17ae | 1032 | if (cmd == RTM_NEWROUTE) { |
1033 | if (nexthop->rmap_src.ipv4.s_addr) | |
1034 | addattr_l(nlmsg, req_size, RTA_PREFSRC, | |
1035 | &nexthop->rmap_src.ipv4, bytelen); | |
1036 | else if (nexthop->src.ipv4.s_addr) | |
1037 | addattr_l(nlmsg, req_size, RTA_PREFSRC, | |
1038 | &nexthop->src.ipv4, bytelen); | |
1039 | } | |
fa713d9e | 1040 | |
d62a17ae | 1041 | if (IS_ZEBRA_DEBUG_KERNEL) |
1042 | zlog_debug( | |
1043 | "netlink_route_multipath() (%s): " | |
7556c3fd DS |
1044 | "nexthop via if %u(%u)", |
1045 | routedesc, nexthop->ifindex, nexthop->vrf_id); | |
0aabccc0 DD |
1046 | } |
1047 | ||
d62a17ae | 1048 | if (nexthop->type == NEXTHOP_TYPE_IPV6_IFINDEX) { |
d62a17ae | 1049 | if (cmd == RTM_NEWROUTE) { |
1050 | if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->rmap_src.ipv6)) | |
1051 | addattr_l(nlmsg, req_size, RTA_PREFSRC, | |
1052 | &nexthop->rmap_src.ipv6, bytelen); | |
1053 | else if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->src.ipv6)) | |
1054 | addattr_l(nlmsg, req_size, RTA_PREFSRC, | |
1055 | &nexthop->src.ipv6, bytelen); | |
1056 | } | |
1057 | ||
1058 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1059 | zlog_debug( | |
1060 | "netlink_route_multipath() (%s): " | |
7556c3fd DS |
1061 | "nexthop via if %u(%u)", |
1062 | routedesc, nexthop->ifindex, nexthop->vrf_id); | |
d62a17ae | 1063 | } |
fa713d9e CF |
1064 | } |
1065 | ||
1066 | /* This function takes a nexthop as argument and | |
1067 | * appends to the given rtattr/rtnexthop pair the | |
1068 | * representation of the nexthop. If the nexthop | |
1069 | * defines a preferred source, the src parameter | |
1070 | * will be modified to point to that src, otherwise | |
1071 | * it will be kept unmodified. | |
1072 | * | |
1073 | * @param routedesc: Human readable description of route type | |
1074 | * (direct/recursive, single-/multipath) | |
1075 | * @param bytelen: Length of addresses in bytes. | |
1076 | * @param nexthop: Nexthop information | |
1077 | * @param rta: rtnetlink attribute structure | |
1078 | * @param rtnh: pointer to an rtnetlink nexthop structure | |
1079 | * @param src: pointer pointing to a location where | |
1080 | * the prefsrc should be stored. | |
1081 | */ | |
d62a17ae | 1082 | static void _netlink_route_build_multipath(const char *routedesc, int bytelen, |
1083 | struct nexthop *nexthop, | |
1084 | struct rtattr *rta, | |
1085 | struct rtnexthop *rtnh, | |
1086 | struct rtmsg *rtmsg, | |
1087 | union g_addr **src) | |
fa713d9e | 1088 | { |
8ecdb26e | 1089 | struct mpls_label_stack *nh_label; |
d62a17ae | 1090 | mpls_lse_t out_lse[MPLS_MAX_LABELS]; |
fa712963 | 1091 | int num_labels = 0; |
9a62e84b | 1092 | char label_buf[256]; |
d62a17ae | 1093 | |
1094 | rtnh->rtnh_len = sizeof(*rtnh); | |
1095 | rtnh->rtnh_flags = 0; | |
1096 | rtnh->rtnh_hops = 0; | |
1097 | rta->rta_len += rtnh->rtnh_len; | |
1098 | ||
1099 | /* | |
1100 | * label_buf is *only* currently used within debugging. | |
1101 | * As such when we assign it we are guarding it inside | |
1102 | * a debug test. If you want to change this make sure | |
1103 | * you fix this assumption | |
1104 | */ | |
1105 | label_buf[0] = '\0'; | |
d62a17ae | 1106 | |
fa712963 RW |
1107 | assert(nexthop); |
1108 | for (struct nexthop *nh = nexthop; nh; nh = nh->rparent) { | |
d62a17ae | 1109 | char label_buf1[20]; |
1110 | ||
fa712963 RW |
1111 | nh_label = nh->nh_label; |
1112 | if (!nh_label || !nh_label->num_labels) | |
1113 | continue; | |
1114 | ||
1115 | for (int i = 0; i < nh_label->num_labels; i++) { | |
1116 | if (nh_label->label[i] == MPLS_LABEL_IMPLICIT_NULL) | |
1117 | continue; | |
1118 | ||
1119 | if (IS_ZEBRA_DEBUG_KERNEL) { | |
1120 | if (!num_labels) | |
1121 | sprintf(label_buf, "label %u", | |
1122 | nh_label->label[i]); | |
1123 | else { | |
1124 | sprintf(label_buf1, "/%u", | |
1125 | nh_label->label[i]); | |
1126 | strlcat(label_buf, label_buf1, | |
1127 | sizeof(label_buf)); | |
d62a17ae | 1128 | } |
d62a17ae | 1129 | } |
fa712963 RW |
1130 | |
1131 | out_lse[num_labels] = | |
1132 | mpls_lse_encode(nh_label->label[i], 0, 0, 0); | |
1133 | num_labels++; | |
d62a17ae | 1134 | } |
fa712963 RW |
1135 | } |
1136 | ||
1137 | if (num_labels) { | |
1138 | /* Set the BoS bit */ | |
1139 | out_lse[num_labels - 1] |= htonl(1 << MPLS_LS_S_SHIFT); | |
1140 | ||
1141 | if (rtmsg->rtm_family == AF_MPLS) { | |
1142 | rta_addattr_l(rta, NL_PKT_BUF_SIZE, RTA_NEWDST, | |
1143 | &out_lse, | |
1144 | num_labels * sizeof(mpls_lse_t)); | |
1145 | rtnh->rtnh_len += | |
1146 | RTA_LENGTH(num_labels * sizeof(mpls_lse_t)); | |
1147 | } else { | |
1148 | struct rtattr *nest; | |
d7c0a89a | 1149 | uint16_t encap = LWTUNNEL_ENCAP_MPLS; |
fa712963 RW |
1150 | int len = rta->rta_len; |
1151 | ||
1152 | rta_addattr_l(rta, NL_PKT_BUF_SIZE, RTA_ENCAP_TYPE, | |
d7c0a89a | 1153 | &encap, sizeof(uint16_t)); |
fa712963 RW |
1154 | nest = rta_nest(rta, NL_PKT_BUF_SIZE, RTA_ENCAP); |
1155 | rta_addattr_l(rta, NL_PKT_BUF_SIZE, MPLS_IPTUNNEL_DST, | |
1156 | &out_lse, | |
1157 | num_labels * sizeof(mpls_lse_t)); | |
1158 | rta_nest_end(rta, nest); | |
1159 | rtnh->rtnh_len += rta->rta_len - len; | |
66d42727 | 1160 | } |
d62a17ae | 1161 | } |
1162 | ||
1163 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ONLINK)) | |
1164 | rtnh->rtnh_flags |= RTNH_F_ONLINK; | |
1165 | ||
1166 | if (rtmsg->rtm_family == AF_INET | |
1167 | && (nexthop->type == NEXTHOP_TYPE_IPV6 | |
1168 | || nexthop->type == NEXTHOP_TYPE_IPV6_IFINDEX)) { | |
1169 | bytelen = 4; | |
1170 | rtnh->rtnh_flags |= RTNH_F_ONLINK; | |
1171 | rta_addattr_l(rta, NL_PKT_BUF_SIZE, RTA_GATEWAY, &ipv4_ll, | |
1172 | bytelen); | |
1173 | rtnh->rtnh_len += sizeof(struct rtattr) + bytelen; | |
1174 | rtnh->rtnh_ifindex = nexthop->ifindex; | |
1175 | ||
1176 | if (nexthop->rmap_src.ipv4.s_addr) | |
1177 | *src = &nexthop->rmap_src; | |
1178 | else if (nexthop->src.ipv4.s_addr) | |
1179 | *src = &nexthop->src; | |
1180 | ||
1181 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1182 | zlog_debug( | |
1183 | " 5549: netlink_route_build_multipath() (%s): " | |
1184 | "nexthop via %s %s if %u", | |
1185 | routedesc, ipv4_ll_buf, label_buf, | |
1186 | nexthop->ifindex); | |
1187 | return; | |
1188 | } | |
1189 | ||
1190 | if (nexthop->type == NEXTHOP_TYPE_IPV4 | |
1191 | || nexthop->type == NEXTHOP_TYPE_IPV4_IFINDEX) { | |
1192 | _netlink_route_rta_add_gateway_info(rtmsg->rtm_family, AF_INET, | |
1193 | rta, rtnh, NL_PKT_BUF_SIZE, | |
1194 | bytelen, nexthop); | |
1195 | if (nexthop->rmap_src.ipv4.s_addr) | |
1196 | *src = &nexthop->rmap_src; | |
1197 | else if (nexthop->src.ipv4.s_addr) | |
1198 | *src = &nexthop->src; | |
1199 | ||
1200 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1201 | zlog_debug( | |
1202 | "netlink_route_multipath() (%s): " | |
1203 | "nexthop via %s %s if %u", | |
1204 | routedesc, inet_ntoa(nexthop->gate.ipv4), | |
1205 | label_buf, nexthop->ifindex); | |
1206 | } | |
1207 | if (nexthop->type == NEXTHOP_TYPE_IPV6 | |
1208 | || nexthop->type == NEXTHOP_TYPE_IPV6_IFINDEX) { | |
1209 | _netlink_route_rta_add_gateway_info(rtmsg->rtm_family, AF_INET6, | |
1210 | rta, rtnh, NL_PKT_BUF_SIZE, | |
1211 | bytelen, nexthop); | |
1212 | ||
1213 | if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->rmap_src.ipv6)) | |
1214 | *src = &nexthop->rmap_src; | |
1215 | else if (!IN6_IS_ADDR_UNSPECIFIED(&nexthop->src.ipv6)) | |
1216 | *src = &nexthop->src; | |
1217 | ||
1218 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1219 | zlog_debug( | |
1220 | "netlink_route_multipath() (%s): " | |
1221 | "nexthop via %s %s if %u", | |
1222 | routedesc, inet6_ntoa(nexthop->gate.ipv6), | |
1223 | label_buf, nexthop->ifindex); | |
1224 | } | |
5e210522 DS |
1225 | |
1226 | /* | |
1227 | * We have figured out the ifindex so we should always send it | |
1228 | * This is especially useful if we are doing route | |
1229 | * leaking. | |
1230 | */ | |
1231 | if (nexthop->type != NEXTHOP_TYPE_BLACKHOLE) | |
1232 | rtnh->rtnh_ifindex = nexthop->ifindex; | |
1233 | ||
d62a17ae | 1234 | /* ifindex */ |
1235 | if (nexthop->type == NEXTHOP_TYPE_IPV4_IFINDEX | |
1236 | || nexthop->type == NEXTHOP_TYPE_IFINDEX) { | |
d62a17ae | 1237 | if (nexthop->rmap_src.ipv4.s_addr) |
1238 | *src = &nexthop->rmap_src; | |
1239 | else if (nexthop->src.ipv4.s_addr) | |
1240 | *src = &nexthop->src; | |
1241 | ||
1242 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1243 | zlog_debug( | |
1244 | "netlink_route_multipath() (%s): " | |
1245 | "nexthop via if %u", | |
1246 | routedesc, nexthop->ifindex); | |
d62a17ae | 1247 | } |
fa713d9e CF |
1248 | } |
1249 | ||
d62a17ae | 1250 | static inline void _netlink_mpls_build_singlepath(const char *routedesc, |
1251 | zebra_nhlfe_t *nhlfe, | |
1252 | struct nlmsghdr *nlmsg, | |
1253 | struct rtmsg *rtmsg, | |
1254 | size_t req_size, int cmd) | |
40c7bdb0 | 1255 | { |
d62a17ae | 1256 | int bytelen; |
d7c0a89a | 1257 | uint8_t family; |
40c7bdb0 | 1258 | |
d62a17ae | 1259 | family = NHLFE_FAMILY(nhlfe); |
1260 | bytelen = (family == AF_INET ? 4 : 16); | |
1261 | _netlink_route_build_singlepath(routedesc, bytelen, nhlfe->nexthop, | |
1262 | nlmsg, rtmsg, req_size, cmd); | |
40c7bdb0 | 1263 | } |
1264 | ||
1265 | ||
1266 | static inline void | |
d62a17ae | 1267 | _netlink_mpls_build_multipath(const char *routedesc, zebra_nhlfe_t *nhlfe, |
1268 | struct rtattr *rta, struct rtnexthop *rtnh, | |
1269 | struct rtmsg *rtmsg, union g_addr **src) | |
40c7bdb0 | 1270 | { |
d62a17ae | 1271 | int bytelen; |
d7c0a89a | 1272 | uint8_t family; |
40c7bdb0 | 1273 | |
d62a17ae | 1274 | family = NHLFE_FAMILY(nhlfe); |
1275 | bytelen = (family == AF_INET ? 4 : 16); | |
1276 | _netlink_route_build_multipath(routedesc, bytelen, nhlfe->nexthop, rta, | |
1277 | rtnh, rtmsg, src); | |
40c7bdb0 | 1278 | } |
1279 | ||
1280 | ||
fa713d9e CF |
1281 | /* Log debug information for netlink_route_multipath |
1282 | * if debug logging is enabled. | |
1283 | * | |
1284 | * @param cmd: Netlink command which is to be processed | |
1285 | * @param p: Prefix for which the change is due | |
fa713d9e | 1286 | * @param family: Address family which the change concerns |
45df4e96 DS |
1287 | * @param zvrf: The vrf we are in |
1288 | * @param tableid: The table we are working on | |
fa713d9e | 1289 | */ |
d62a17ae | 1290 | static void _netlink_route_debug(int cmd, struct prefix *p, |
7556c3fd DS |
1291 | int family, struct zebra_vrf *zvrf, |
1292 | uint32_t tableid) | |
fa713d9e | 1293 | { |
d62a17ae | 1294 | if (IS_ZEBRA_DEBUG_KERNEL) { |
1295 | char buf[PREFIX_STRLEN]; | |
1296 | zlog_debug( | |
45df4e96 DS |
1297 | "netlink_route_multipath(): %s %s vrf %u(%u)", |
1298 | nl_msg_type_to_str(cmd), | |
1299 | prefix2str(p, buf, sizeof(buf)), | |
1300 | zvrf_id(zvrf), tableid); | |
d62a17ae | 1301 | } |
1302 | } | |
1303 | ||
d7c0a89a | 1304 | static void _netlink_mpls_debug(int cmd, uint32_t label, const char *routedesc) |
40c7bdb0 | 1305 | { |
d62a17ae | 1306 | if (IS_ZEBRA_DEBUG_KERNEL) |
1307 | zlog_debug("netlink_mpls_multipath() (%s): %s %u/20", routedesc, | |
1308 | nl_msg_type_to_str(cmd), label); | |
fa713d9e CF |
1309 | } |
1310 | ||
d62a17ae | 1311 | static int netlink_neigh_update(int cmd, int ifindex, uint32_t addr, char *lla, |
5895d33f | 1312 | int llalen, ns_id_t ns_id) |
5c610faf | 1313 | { |
d62a17ae | 1314 | struct { |
1315 | struct nlmsghdr n; | |
1316 | struct ndmsg ndm; | |
1317 | char buf[256]; | |
1318 | } req; | |
5c610faf | 1319 | |
5895d33f | 1320 | struct zebra_ns *zns = zebra_ns_lookup(ns_id); |
8f7d9fc0 | 1321 | |
5605ecfc | 1322 | memset(&req, 0, sizeof(req)); |
5c610faf | 1323 | |
d62a17ae | 1324 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)); |
1325 | req.n.nlmsg_flags = NLM_F_CREATE | NLM_F_REQUEST; | |
1326 | req.n.nlmsg_type = cmd; // RTM_NEWNEIGH or RTM_DELNEIGH | |
1327 | req.n.nlmsg_pid = zns->netlink_cmd.snl.nl_pid; | |
a55ba23f | 1328 | |
d62a17ae | 1329 | req.ndm.ndm_family = AF_INET; |
1330 | req.ndm.ndm_state = NUD_PERMANENT; | |
1331 | req.ndm.ndm_ifindex = ifindex; | |
1332 | req.ndm.ndm_type = RTN_UNICAST; | |
5c610faf | 1333 | |
d62a17ae | 1334 | addattr_l(&req.n, sizeof(req), NDA_DST, &addr, 4); |
1335 | addattr_l(&req.n, sizeof(req), NDA_LLADDR, lla, llalen); | |
5c610faf | 1336 | |
d62a17ae | 1337 | return netlink_talk(netlink_talk_filter, &req.n, &zns->netlink_cmd, zns, |
1338 | 0); | |
5c610faf DS |
1339 | } |
1340 | ||
718e3744 | 1341 | /* Routing table change via netlink interface. */ |
6ae24471 | 1342 | /* Update flag indicates whether this is a "replace" or not. */ |
d62a17ae | 1343 | static int netlink_route_multipath(int cmd, struct prefix *p, |
1344 | struct prefix *src_p, struct route_entry *re, | |
1345 | int update) | |
718e3744 | 1346 | { |
d62a17ae | 1347 | int bytelen; |
1348 | struct sockaddr_nl snl; | |
1349 | struct nexthop *nexthop = NULL; | |
1350 | unsigned int nexthop_num; | |
d62a17ae | 1351 | int family = PREFIX_FAMILY(p); |
1352 | const char *routedesc; | |
1353 | int setsrc = 0; | |
1354 | union g_addr src; | |
1355 | ||
1356 | struct { | |
1357 | struct nlmsghdr n; | |
1358 | struct rtmsg r; | |
1359 | char buf[NL_PKT_BUF_SIZE]; | |
1360 | } req; | |
1361 | ||
9a76375f | 1362 | struct zebra_ns *zns; |
d62a17ae | 1363 | struct zebra_vrf *zvrf = vrf_info_lookup(re->vrf_id); |
1364 | ||
009f8ad5 | 1365 | zns = zvrf->zns; |
d62a17ae | 1366 | memset(&req, 0, sizeof req - NL_PKT_BUF_SIZE); |
1367 | ||
1368 | bytelen = (family == AF_INET ? 4 : 16); | |
1369 | ||
1370 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)); | |
1371 | req.n.nlmsg_flags = NLM_F_CREATE | NLM_F_REQUEST; | |
1372 | if ((cmd == RTM_NEWROUTE) && update) | |
1373 | req.n.nlmsg_flags |= NLM_F_REPLACE; | |
1374 | req.n.nlmsg_type = cmd; | |
1375 | req.n.nlmsg_pid = zns->netlink_cmd.snl.nl_pid; | |
1376 | ||
1377 | req.r.rtm_family = family; | |
1378 | req.r.rtm_dst_len = p->prefixlen; | |
1379 | req.r.rtm_src_len = src_p ? src_p->prefixlen : 0; | |
915902cb | 1380 | req.r.rtm_protocol = zebra2proto(re->type); |
d62a17ae | 1381 | req.r.rtm_scope = RT_SCOPE_UNIVERSE; |
c766824c DS |
1382 | |
1383 | /* | |
1384 | * blackhole routes are not RTN_UNICAST, they are | |
1385 | * RTN_ BLACKHOLE|UNREACHABLE|PROHIBIT | |
1386 | * so setting this value as a RTN_UNICAST would | |
1387 | * cause the route lookup of just the prefix | |
1388 | * to fail. So no need to specify this for | |
1389 | * the RTM_DELROUTE case | |
1390 | */ | |
1391 | if (cmd != RTM_DELROUTE) | |
1392 | req.r.rtm_type = RTN_UNICAST; | |
d62a17ae | 1393 | |
d62a17ae | 1394 | addattr_l(&req.n, sizeof req, RTA_DST, &p->u.prefix, bytelen); |
1395 | if (src_p) | |
1396 | addattr_l(&req.n, sizeof req, RTA_SRC, &src_p->u.prefix, | |
1397 | bytelen); | |
1398 | ||
1399 | /* Metric. */ | |
1400 | /* Hardcode the metric for all routes coming from zebra. Metric isn't | |
1401 | * used | |
1402 | * either by the kernel or by zebra. Its purely for calculating best | |
1403 | * path(s) | |
1404 | * by the routing protocol and for communicating with protocol peers. | |
1405 | */ | |
1406 | addattr32(&req.n, sizeof req, RTA_PRIORITY, NL_DEFAULT_ROUTE_METRIC); | |
4e40b6d6 KK |
1407 | #if defined(SUPPORT_REALMS) |
1408 | if (re->tag > 0 && re->tag <= 255) | |
1409 | addattr32(&req.n, sizeof req, RTA_FLOW, re->tag); | |
1410 | #endif | |
d62a17ae | 1411 | /* Table corresponding to this route. */ |
1412 | if (re->table < 256) | |
1413 | req.r.rtm_table = re->table; | |
1414 | else { | |
1415 | req.r.rtm_table = RT_TABLE_UNSPEC; | |
1416 | addattr32(&req.n, sizeof req, RTA_TABLE, re->table); | |
0aabccc0 | 1417 | } |
718e3744 | 1418 | |
45df4e96 DS |
1419 | _netlink_route_debug(cmd, p, family, zvrf, re->table); |
1420 | ||
c1d63a93 DS |
1421 | /* |
1422 | * If we are not updating the route and we have received | |
1423 | * a route delete, then all we need to fill in is the | |
1424 | * prefix information to tell the kernel to schwack | |
1425 | * it. | |
1426 | */ | |
1427 | if (!update && cmd == RTM_DELROUTE) | |
a8309422 DL |
1428 | goto skip; |
1429 | ||
d62a17ae | 1430 | if (re->mtu || re->nexthop_mtu) { |
1431 | char buf[NL_PKT_BUF_SIZE]; | |
1432 | struct rtattr *rta = (void *)buf; | |
d7c0a89a | 1433 | uint32_t mtu = re->mtu; |
d62a17ae | 1434 | if (!mtu || (re->nexthop_mtu && re->nexthop_mtu < mtu)) |
1435 | mtu = re->nexthop_mtu; | |
1436 | rta->rta_type = RTA_METRICS; | |
1437 | rta->rta_len = RTA_LENGTH(0); | |
1438 | rta_addattr_l(rta, NL_PKT_BUF_SIZE, RTAX_MTU, &mtu, sizeof mtu); | |
1439 | addattr_l(&req.n, NL_PKT_BUF_SIZE, RTA_METRICS, RTA_DATA(rta), | |
1440 | RTA_PAYLOAD(rta)); | |
1441 | } | |
1442 | ||
d62a17ae | 1443 | /* Count overall nexthops so we can decide whether to use singlepath |
1444 | * or multipath case. */ | |
1445 | nexthop_num = 0; | |
7ee30f28 | 1446 | for (ALL_NEXTHOPS(re->ng, nexthop)) { |
d62a17ae | 1447 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_RECURSIVE)) |
1448 | continue; | |
996c9314 | 1449 | if (cmd == RTM_NEWROUTE && !NEXTHOP_IS_ACTIVE(nexthop->flags)) |
d62a17ae | 1450 | continue; |
1451 | if (cmd == RTM_DELROUTE | |
1452 | && !CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB)) | |
1453 | continue; | |
1454 | ||
1455 | nexthop_num++; | |
1456 | } | |
1457 | ||
1458 | /* Singlepath case. */ | |
1459 | if (nexthop_num == 1 || multipath_num == 1) { | |
1460 | nexthop_num = 0; | |
7ee30f28 | 1461 | for (ALL_NEXTHOPS(re->ng, nexthop)) { |
1f1d24a8 DS |
1462 | /* |
1463 | * So we want to cover 2 types of blackhole | |
1464 | * routes here: | |
1465 | * 1) A normal blackhole route( ala from a static | |
1466 | * install. | |
1467 | * 2) A recursively resolved blackhole route | |
1468 | */ | |
1469 | if (nexthop->type == NEXTHOP_TYPE_BLACKHOLE) { | |
1470 | switch (nexthop->bh_type) { | |
1471 | case BLACKHOLE_ADMINPROHIB: | |
1472 | req.r.rtm_type = RTN_PROHIBIT; | |
1473 | break; | |
1474 | case BLACKHOLE_REJECT: | |
1475 | req.r.rtm_type = RTN_UNREACHABLE; | |
1476 | break; | |
1477 | default: | |
1478 | req.r.rtm_type = RTN_BLACKHOLE; | |
1479 | break; | |
1480 | } | |
1481 | goto skip; | |
1482 | } | |
d62a17ae | 1483 | if (CHECK_FLAG(nexthop->flags, |
1484 | NEXTHOP_FLAG_RECURSIVE)) { | |
1485 | if (!setsrc) { | |
1486 | if (family == AF_INET) { | |
1487 | if (nexthop->rmap_src.ipv4 | |
1488 | .s_addr | |
1489 | != 0) { | |
1490 | src.ipv4 = | |
1491 | nexthop->rmap_src | |
1492 | .ipv4; | |
1493 | setsrc = 1; | |
1494 | } else if (nexthop->src.ipv4 | |
1495 | .s_addr | |
1496 | != 0) { | |
1497 | src.ipv4 = | |
1498 | nexthop->src | |
1499 | .ipv4; | |
1500 | setsrc = 1; | |
1501 | } | |
1502 | } else if (family == AF_INET6) { | |
1503 | if (!IN6_IS_ADDR_UNSPECIFIED( | |
1504 | &nexthop->rmap_src | |
1505 | .ipv6)) { | |
1506 | src.ipv6 = | |
1507 | nexthop->rmap_src | |
1508 | .ipv6; | |
1509 | setsrc = 1; | |
1510 | } else if ( | |
1511 | !IN6_IS_ADDR_UNSPECIFIED( | |
1512 | &nexthop->src | |
1513 | .ipv6)) { | |
1514 | src.ipv6 = | |
1515 | nexthop->src | |
1516 | .ipv6; | |
1517 | setsrc = 1; | |
1518 | } | |
1519 | } | |
1520 | } | |
1521 | continue; | |
1522 | } | |
1523 | ||
1524 | if ((cmd == RTM_NEWROUTE | |
25b9cb0c | 1525 | && NEXTHOP_IS_ACTIVE(nexthop->flags)) |
d62a17ae | 1526 | || (cmd == RTM_DELROUTE |
1527 | && CHECK_FLAG(nexthop->flags, | |
1528 | NEXTHOP_FLAG_FIB))) { | |
1529 | routedesc = nexthop->rparent | |
8b1450b9 RW |
1530 | ? "recursive, single-path" |
1531 | : "single-path"; | |
d62a17ae | 1532 | |
d62a17ae | 1533 | _netlink_route_build_singlepath( |
1534 | routedesc, bytelen, nexthop, &req.n, | |
1535 | &req.r, sizeof req, cmd); | |
1536 | nexthop_num++; | |
1537 | break; | |
1538 | } | |
1539 | } | |
1540 | if (setsrc && (cmd == RTM_NEWROUTE)) { | |
1541 | if (family == AF_INET) | |
1542 | addattr_l(&req.n, sizeof req, RTA_PREFSRC, | |
1543 | &src.ipv4, bytelen); | |
1544 | else if (family == AF_INET6) | |
1545 | addattr_l(&req.n, sizeof req, RTA_PREFSRC, | |
1546 | &src.ipv6, bytelen); | |
1547 | } | |
1548 | } else { | |
1549 | char buf[NL_PKT_BUF_SIZE]; | |
1550 | struct rtattr *rta = (void *)buf; | |
1551 | struct rtnexthop *rtnh; | |
1552 | union g_addr *src1 = NULL; | |
1553 | ||
1554 | rta->rta_type = RTA_MULTIPATH; | |
1555 | rta->rta_len = RTA_LENGTH(0); | |
1556 | rtnh = RTA_DATA(rta); | |
1557 | ||
1558 | nexthop_num = 0; | |
7ee30f28 | 1559 | for (ALL_NEXTHOPS(re->ng, nexthop)) { |
d62a17ae | 1560 | if (nexthop_num >= multipath_num) |
1561 | break; | |
1562 | ||
1563 | if (CHECK_FLAG(nexthop->flags, | |
1564 | NEXTHOP_FLAG_RECURSIVE)) { | |
1565 | /* This only works for IPv4 now */ | |
1566 | if (!setsrc) { | |
1567 | if (family == AF_INET) { | |
1568 | if (nexthop->rmap_src.ipv4 | |
1569 | .s_addr | |
1570 | != 0) { | |
1571 | src.ipv4 = | |
1572 | nexthop->rmap_src | |
1573 | .ipv4; | |
1574 | setsrc = 1; | |
1575 | } else if (nexthop->src.ipv4 | |
1576 | .s_addr | |
1577 | != 0) { | |
1578 | src.ipv4 = | |
1579 | nexthop->src | |
1580 | .ipv4; | |
1581 | setsrc = 1; | |
1582 | } | |
1583 | } else if (family == AF_INET6) { | |
1584 | if (!IN6_IS_ADDR_UNSPECIFIED( | |
1585 | &nexthop->rmap_src | |
1586 | .ipv6)) { | |
1587 | src.ipv6 = | |
1588 | nexthop->rmap_src | |
1589 | .ipv6; | |
1590 | setsrc = 1; | |
1591 | } else if ( | |
1592 | !IN6_IS_ADDR_UNSPECIFIED( | |
1593 | &nexthop->src | |
1594 | .ipv6)) { | |
1595 | src.ipv6 = | |
1596 | nexthop->src | |
1597 | .ipv6; | |
1598 | setsrc = 1; | |
1599 | } | |
1600 | } | |
1601 | } | |
1602 | continue; | |
1603 | } | |
1604 | ||
1605 | if ((cmd == RTM_NEWROUTE | |
25b9cb0c | 1606 | && NEXTHOP_IS_ACTIVE(nexthop->flags)) |
d62a17ae | 1607 | || (cmd == RTM_DELROUTE |
1608 | && CHECK_FLAG(nexthop->flags, | |
1609 | NEXTHOP_FLAG_FIB))) { | |
1610 | routedesc = nexthop->rparent | |
8b1450b9 RW |
1611 | ? "recursive, multipath" |
1612 | : "multipath"; | |
d62a17ae | 1613 | nexthop_num++; |
1614 | ||
d62a17ae | 1615 | _netlink_route_build_multipath( |
1616 | routedesc, bytelen, nexthop, rta, rtnh, | |
1617 | &req.r, &src1); | |
1618 | rtnh = RTNH_NEXT(rtnh); | |
1619 | ||
1620 | if (!setsrc && src1) { | |
1621 | if (family == AF_INET) | |
1622 | src.ipv4 = src1->ipv4; | |
1623 | else if (family == AF_INET6) | |
1624 | src.ipv6 = src1->ipv6; | |
1625 | ||
1626 | setsrc = 1; | |
1627 | } | |
1628 | } | |
1629 | } | |
1630 | if (setsrc && (cmd == RTM_NEWROUTE)) { | |
1631 | if (family == AF_INET) | |
1632 | addattr_l(&req.n, sizeof req, RTA_PREFSRC, | |
1633 | &src.ipv4, bytelen); | |
1634 | else if (family == AF_INET6) | |
1635 | addattr_l(&req.n, sizeof req, RTA_PREFSRC, | |
1636 | &src.ipv6, bytelen); | |
1637 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1638 | zlog_debug("Setting source"); | |
1639 | } | |
1640 | ||
1641 | if (rta->rta_len > RTA_LENGTH(0)) | |
1642 | addattr_l(&req.n, NL_PKT_BUF_SIZE, RTA_MULTIPATH, | |
1643 | RTA_DATA(rta), RTA_PAYLOAD(rta)); | |
1644 | } | |
718e3744 | 1645 | |
d62a17ae | 1646 | /* If there is no useful nexthop then return. */ |
1647 | if (nexthop_num == 0) { | |
1648 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1649 | zlog_debug( | |
1650 | "netlink_route_multipath(): No useful nexthop."); | |
1651 | return 0; | |
1652 | } | |
718e3744 | 1653 | |
7021c425 | 1654 | skip: |
718e3744 | 1655 | |
d62a17ae | 1656 | /* Destination netlink address. */ |
1657 | memset(&snl, 0, sizeof snl); | |
1658 | snl.nl_family = AF_NETLINK; | |
718e3744 | 1659 | |
d62a17ae | 1660 | /* Talk to netlink socket. */ |
1661 | return netlink_talk(netlink_talk_filter, &req.n, &zns->netlink_cmd, zns, | |
1662 | 0); | |
718e3744 | 1663 | } |
1664 | ||
43b5cc5e | 1665 | int kernel_get_ipmr_sg_stats(struct zebra_vrf *zvrf, void *in) |
e3be0432 | 1666 | { |
d62a17ae | 1667 | int suc = 0; |
1668 | struct mcast_route_data *mr = (struct mcast_route_data *)in; | |
bd8b9272 DS |
1669 | struct { |
1670 | struct nlmsghdr n; | |
1671 | struct ndmsg ndm; | |
1672 | char buf[256]; | |
1673 | } req; | |
e3be0432 | 1674 | |
d62a17ae | 1675 | mroute = mr; |
5895d33f | 1676 | struct zebra_ns *zns; |
bd8b9272 | 1677 | |
009f8ad5 | 1678 | zns = zvrf->zns; |
5605ecfc | 1679 | memset(&req, 0, sizeof(req)); |
bd8b9272 DS |
1680 | |
1681 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)); | |
1682 | req.n.nlmsg_flags = NLM_F_REQUEST; | |
1683 | req.n.nlmsg_pid = zns->netlink_cmd.snl.nl_pid; | |
1684 | ||
1685 | req.ndm.ndm_family = RTNL_FAMILY_IPMR; | |
1686 | req.n.nlmsg_type = RTM_GETROUTE; | |
1687 | ||
1688 | addattr_l(&req.n, sizeof(req), RTA_IIF, &mroute->ifindex, 4); | |
1689 | addattr_l(&req.n, sizeof(req), RTA_OIF, &mroute->ifindex, 4); | |
1690 | addattr_l(&req.n, sizeof(req), RTA_SRC, &mroute->sg.src.s_addr, 4); | |
1691 | addattr_l(&req.n, sizeof(req), RTA_DST, &mroute->sg.grp.s_addr, 4); | |
1692 | addattr_l(&req.n, sizeof(req), RTA_TABLE, &zvrf->table_id, 4); | |
e3be0432 | 1693 | |
bd8b9272 DS |
1694 | suc = netlink_talk(netlink_route_change_read_multicast, &req.n, |
1695 | &zns->netlink_cmd, zns, 0); | |
e3be0432 | 1696 | |
bd8b9272 | 1697 | mroute = NULL; |
d62a17ae | 1698 | return suc; |
e3be0432 DS |
1699 | } |
1700 | ||
1e885672 DS |
1701 | enum dp_req_result kernel_route_rib(struct route_node *rn, |
1702 | struct prefix *p, | |
1703 | struct prefix *src_p, | |
215181cb DS |
1704 | struct route_entry *old, |
1705 | struct route_entry *new) | |
718e3744 | 1706 | { |
0c555cc6 DS |
1707 | int ret = 0; |
1708 | ||
0af35d90 RW |
1709 | assert(old || new); |
1710 | ||
0c555cc6 | 1711 | if (new) { |
6b093863 | 1712 | if (p->family == AF_INET || v6_rr_semantics) |
0c555cc6 DS |
1713 | ret = netlink_route_multipath(RTM_NEWROUTE, p, src_p, |
1714 | new, (old) ? 1 : 0); | |
1715 | else { | |
1716 | /* | |
1717 | * So v6 route replace semantics are not in | |
1718 | * the kernel at this point as I understand it. | |
1719 | * So let's do a delete than an add. | |
1720 | * In the future once v6 route replace semantics | |
1721 | * are in we can figure out what to do here to | |
1722 | * allow working with old and new kernels. | |
1723 | * | |
1724 | * I'm also intentionally ignoring the failure case | |
1725 | * of the route delete. If that happens yeah we're | |
1726 | * screwed. | |
1727 | */ | |
1728 | if (old) | |
996c9314 LB |
1729 | netlink_route_multipath(RTM_DELROUTE, p, src_p, |
1730 | old, 0); | |
1731 | ret = netlink_route_multipath(RTM_NEWROUTE, p, src_p, | |
1732 | new, 0); | |
0c555cc6 | 1733 | } |
7d974ba3 | 1734 | kernel_route_rib_pass_fail(rn, p, new, |
215181cb DS |
1735 | (!ret) ? DP_INSTALL_SUCCESS |
1736 | : DP_INSTALL_FAILURE); | |
1e885672 | 1737 | return DP_REQUEST_SUCCESS; |
0c555cc6 | 1738 | } |
718e3744 | 1739 | |
0c555cc6 DS |
1740 | if (old) { |
1741 | ret = netlink_route_multipath(RTM_DELROUTE, p, src_p, old, 0); | |
e7fcb843 | 1742 | |
7d974ba3 | 1743 | kernel_route_rib_pass_fail(rn, p, old, |
215181cb DS |
1744 | (!ret) ? DP_DELETE_SUCCESS |
1745 | : DP_DELETE_FAILURE); | |
0c555cc6 | 1746 | } |
215181cb | 1747 | |
1e885672 | 1748 | return DP_REQUEST_SUCCESS; |
718e3744 | 1749 | } |
1750 | ||
d62a17ae | 1751 | int kernel_neigh_update(int add, int ifindex, uint32_t addr, char *lla, |
5895d33f | 1752 | int llalen, ns_id_t ns_id) |
6b8a5694 | 1753 | { |
d62a17ae | 1754 | return netlink_neigh_update(add ? RTM_NEWNEIGH : RTM_DELNEIGH, ifindex, |
5895d33f | 1755 | addr, lla, llalen, ns_id); |
6b8a5694 | 1756 | } |
718e3744 | 1757 | |
13d60d35 | 1758 | /* |
1759 | * Add remote VTEP to the flood list for this VxLAN interface (VNI). This | |
1760 | * is done by adding an FDB entry with a MAC of 00:00:00:00:00:00. | |
1761 | */ | |
d62a17ae | 1762 | static int netlink_vxlan_flood_list_update(struct interface *ifp, |
1763 | struct in_addr *vtep_ip, int cmd) | |
13d60d35 | 1764 | { |
5895d33f | 1765 | struct zebra_ns *zns; |
d62a17ae | 1766 | struct { |
1767 | struct nlmsghdr n; | |
1768 | struct ndmsg ndm; | |
1769 | char buf[256]; | |
1770 | } req; | |
d7c0a89a | 1771 | uint8_t dst_mac[6] = {0x0, 0x0, 0x0, 0x0, 0x0, 0x0}; |
009f8ad5 | 1772 | struct zebra_vrf *zvrf = zebra_vrf_lookup_by_id(ifp->vrf_id); |
d62a17ae | 1773 | |
009f8ad5 | 1774 | zns = zvrf->zns; |
5605ecfc | 1775 | memset(&req, 0, sizeof(req)); |
d62a17ae | 1776 | |
1777 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)); | |
1778 | req.n.nlmsg_flags = NLM_F_REQUEST; | |
1779 | if (cmd == RTM_NEWNEIGH) | |
1780 | req.n.nlmsg_flags |= (NLM_F_CREATE | NLM_F_APPEND); | |
1781 | req.n.nlmsg_type = cmd; | |
1782 | req.ndm.ndm_family = PF_BRIDGE; | |
1783 | req.ndm.ndm_state = NUD_NOARP | NUD_PERMANENT; | |
1784 | req.ndm.ndm_flags |= NTF_SELF; // Handle by "self", not "master" | |
1785 | ||
1786 | ||
1787 | addattr_l(&req.n, sizeof(req), NDA_LLADDR, &dst_mac, 6); | |
1788 | req.ndm.ndm_ifindex = ifp->ifindex; | |
1789 | addattr_l(&req.n, sizeof(req), NDA_DST, &vtep_ip->s_addr, 4); | |
1790 | ||
1791 | return netlink_talk(netlink_talk_filter, &req.n, &zns->netlink_cmd, zns, | |
1792 | 0); | |
13d60d35 | 1793 | } |
1794 | ||
1795 | /* | |
d62a17ae | 1796 | * Add remote VTEP for this VxLAN interface (VNI). In Linux, this involves |
1797 | * adding | |
13d60d35 | 1798 | * a "flood" MAC FDB entry. |
1799 | */ | |
d62a17ae | 1800 | int kernel_add_vtep(vni_t vni, struct interface *ifp, struct in_addr *vtep_ip) |
13d60d35 | 1801 | { |
d62a17ae | 1802 | if (IS_ZEBRA_DEBUG_VXLAN) |
1803 | zlog_debug("Install %s into flood list for VNI %u intf %s(%u)", | |
1804 | inet_ntoa(*vtep_ip), vni, ifp->name, ifp->ifindex); | |
13d60d35 | 1805 | |
d62a17ae | 1806 | return netlink_vxlan_flood_list_update(ifp, vtep_ip, RTM_NEWNEIGH); |
13d60d35 | 1807 | } |
1808 | ||
1809 | /* | |
1810 | * Remove remote VTEP for this VxLAN interface (VNI). In Linux, this involves | |
1811 | * deleting the "flood" MAC FDB entry. | |
1812 | */ | |
d62a17ae | 1813 | int kernel_del_vtep(vni_t vni, struct interface *ifp, struct in_addr *vtep_ip) |
13d60d35 | 1814 | { |
d62a17ae | 1815 | if (IS_ZEBRA_DEBUG_VXLAN) |
1816 | zlog_debug( | |
1817 | "Uninstall %s from flood list for VNI %u intf %s(%u)", | |
1818 | inet_ntoa(*vtep_ip), vni, ifp->name, ifp->ifindex); | |
13d60d35 | 1819 | |
d62a17ae | 1820 | return netlink_vxlan_flood_list_update(ifp, vtep_ip, RTM_DELNEIGH); |
13d60d35 | 1821 | } |
1822 | ||
2232a77c | 1823 | #ifndef NDA_RTA |
d62a17ae | 1824 | #define NDA_RTA(r) \ |
1825 | ((struct rtattr *)(((char *)(r)) + NLMSG_ALIGN(sizeof(struct ndmsg)))) | |
2232a77c | 1826 | #endif |
1827 | ||
2414abd3 | 1828 | static int netlink_macfdb_change(struct nlmsghdr *h, int len, ns_id_t ns_id) |
2232a77c | 1829 | { |
d62a17ae | 1830 | struct ndmsg *ndm; |
1831 | struct interface *ifp; | |
1832 | struct zebra_if *zif; | |
d62a17ae | 1833 | struct rtattr *tb[NDA_MAX + 1]; |
1834 | struct interface *br_if; | |
1835 | struct ethaddr mac; | |
1836 | vlanid_t vid = 0; | |
1837 | struct prefix vtep_ip; | |
1838 | int vid_present = 0, dst_present = 0; | |
1839 | char buf[ETHER_ADDR_STRLEN]; | |
1840 | char vid_buf[20]; | |
1841 | char dst_buf[30]; | |
d7c0a89a | 1842 | uint8_t sticky = 0; |
d62a17ae | 1843 | |
1844 | ndm = NLMSG_DATA(h); | |
1845 | ||
2853fed6 | 1846 | /* We only process macfdb notifications if EVPN is enabled */ |
1847 | if (!is_evpn_enabled()) | |
1848 | return 0; | |
1849 | ||
d62a17ae | 1850 | /* The interface should exist. */ |
5895d33f | 1851 | ifp = if_lookup_by_index_per_ns(zebra_ns_lookup(ns_id), |
d62a17ae | 1852 | ndm->ndm_ifindex); |
2853fed6 | 1853 | if (!ifp || !ifp->info) |
d62a17ae | 1854 | return 0; |
1855 | ||
1856 | /* The interface should be something we're interested in. */ | |
1857 | if (!IS_ZEBRA_IF_BRIDGE_SLAVE(ifp)) | |
1858 | return 0; | |
1859 | ||
1860 | /* Drop "permanent" entries. */ | |
1861 | if (ndm->ndm_state & NUD_PERMANENT) | |
1862 | return 0; | |
1863 | ||
1864 | zif = (struct zebra_if *)ifp->info; | |
1865 | if ((br_if = zif->brslave_info.br_if) == NULL) { | |
1866 | zlog_warn("%s family %s IF %s(%u) brIF %u - no bridge master", | |
1867 | nl_msg_type_to_str(h->nlmsg_type), | |
1868 | nl_family_to_str(ndm->ndm_family), ifp->name, | |
1869 | ndm->ndm_ifindex, zif->brslave_info.bridge_ifindex); | |
1870 | return 0; | |
1871 | } | |
1872 | ||
1873 | /* Parse attributes and extract fields of interest. */ | |
1874 | memset(tb, 0, sizeof tb); | |
1875 | netlink_parse_rtattr(tb, NDA_MAX, NDA_RTA(ndm), len); | |
1876 | ||
1877 | if (!tb[NDA_LLADDR]) { | |
1878 | zlog_warn("%s family %s IF %s(%u) brIF %u - no LLADDR", | |
1879 | nl_msg_type_to_str(h->nlmsg_type), | |
1880 | nl_family_to_str(ndm->ndm_family), ifp->name, | |
1881 | ndm->ndm_ifindex, zif->brslave_info.bridge_ifindex); | |
1882 | return 0; | |
1883 | } | |
1884 | ||
ff8b7eb8 | 1885 | if (RTA_PAYLOAD(tb[NDA_LLADDR]) != ETH_ALEN) { |
d62a17ae | 1886 | zlog_warn( |
df0b13cf | 1887 | "%s family %s IF %s(%u) brIF %u - LLADDR is not MAC, len %lu", |
d62a17ae | 1888 | nl_msg_type_to_str(h->nlmsg_type), |
1889 | nl_family_to_str(ndm->ndm_family), ifp->name, | |
1890 | ndm->ndm_ifindex, zif->brslave_info.bridge_ifindex, | |
df0b13cf | 1891 | (unsigned long)RTA_PAYLOAD(tb[NDA_LLADDR])); |
d62a17ae | 1892 | return 0; |
1893 | } | |
1894 | ||
ff8b7eb8 | 1895 | memcpy(&mac, RTA_DATA(tb[NDA_LLADDR]), ETH_ALEN); |
d62a17ae | 1896 | |
1897 | if ((NDA_VLAN <= NDA_MAX) && tb[NDA_VLAN]) { | |
1898 | vid_present = 1; | |
d7c0a89a | 1899 | vid = *(uint16_t *)RTA_DATA(tb[NDA_VLAN]); |
d62a17ae | 1900 | sprintf(vid_buf, " VLAN %u", vid); |
1901 | } | |
1902 | ||
1903 | if (tb[NDA_DST]) { | |
1904 | /* TODO: Only IPv4 supported now. */ | |
1905 | dst_present = 1; | |
1906 | vtep_ip.family = AF_INET; | |
1907 | vtep_ip.prefixlen = IPV4_MAX_BITLEN; | |
1908 | memcpy(&(vtep_ip.u.prefix4.s_addr), RTA_DATA(tb[NDA_DST]), | |
1909 | IPV4_MAX_BYTELEN); | |
1910 | sprintf(dst_buf, " dst %s", inet_ntoa(vtep_ip.u.prefix4)); | |
1911 | } | |
1912 | ||
1913 | sticky = (ndm->ndm_state & NUD_NOARP) ? 1 : 0; | |
1914 | ||
1915 | if (IS_ZEBRA_DEBUG_KERNEL) | |
1916 | zlog_debug("Rx %s family %s IF %s(%u)%s %sMAC %s%s", | |
1917 | nl_msg_type_to_str(h->nlmsg_type), | |
1918 | nl_family_to_str(ndm->ndm_family), ifp->name, | |
1919 | ndm->ndm_ifindex, vid_present ? vid_buf : "", | |
1920 | sticky ? "sticky " : "", | |
1921 | prefix_mac2str(&mac, buf, sizeof(buf)), | |
1922 | dst_present ? dst_buf : ""); | |
1923 | ||
1924 | if (filter_vlan && vid != filter_vlan) | |
1925 | return 0; | |
1926 | ||
1927 | /* If add or update, do accordingly if learnt on a "local" interface; if | |
1928 | * the notification is over VxLAN, this has to be related to | |
1929 | * multi-homing, | |
1930 | * so perform an implicit delete of any local entry (if it exists). | |
1931 | */ | |
1932 | if (h->nlmsg_type == RTM_NEWNEIGH) { | |
1933 | /* Drop "permanent" entries. */ | |
1934 | if (ndm->ndm_state & NUD_PERMANENT) | |
1935 | return 0; | |
1936 | ||
1937 | if (IS_ZEBRA_IF_VXLAN(ifp)) | |
1938 | return zebra_vxlan_check_del_local_mac(ifp, br_if, &mac, | |
1939 | vid); | |
1940 | ||
1941 | return zebra_vxlan_local_mac_add_update(ifp, br_if, &mac, vid, | |
1942 | sticky); | |
1943 | } | |
1944 | ||
1945 | /* This is a delete notification. | |
1946 | * 1. For a MAC over VxLan, check if it needs to be refreshed(readded) | |
1947 | * 2. For a MAC over "local" interface, delete the mac | |
1948 | * Note: We will get notifications from both bridge driver and VxLAN | |
1949 | * driver. | |
1950 | * Ignore the notification from VxLan driver as it is also generated | |
1951 | * when mac moves from remote to local. | |
1952 | */ | |
1953 | if (dst_present) | |
1954 | return 0; | |
1955 | ||
1956 | if (IS_ZEBRA_IF_VXLAN(ifp)) | |
1957 | return zebra_vxlan_check_readd_remote_mac(ifp, br_if, &mac, | |
1958 | vid); | |
1959 | ||
1960 | return zebra_vxlan_local_mac_del(ifp, br_if, &mac, vid); | |
2232a77c | 1961 | } |
1962 | ||
2414abd3 | 1963 | static int netlink_macfdb_table(struct nlmsghdr *h, ns_id_t ns_id, int startup) |
2232a77c | 1964 | { |
d62a17ae | 1965 | int len; |
1966 | struct ndmsg *ndm; | |
2232a77c | 1967 | |
d62a17ae | 1968 | if (h->nlmsg_type != RTM_NEWNEIGH) |
1969 | return 0; | |
2232a77c | 1970 | |
d62a17ae | 1971 | /* Length validity. */ |
1972 | len = h->nlmsg_len - NLMSG_LENGTH(sizeof(struct ndmsg)); | |
1973 | if (len < 0) | |
1974 | return -1; | |
2232a77c | 1975 | |
d62a17ae | 1976 | /* We are interested only in AF_BRIDGE notifications. */ |
1977 | ndm = NLMSG_DATA(h); | |
1978 | if (ndm->ndm_family != AF_BRIDGE) | |
1979 | return 0; | |
2232a77c | 1980 | |
2414abd3 | 1981 | return netlink_macfdb_change(h, len, ns_id); |
2232a77c | 1982 | } |
1983 | ||
1984 | /* Request for MAC FDB information from the kernel */ | |
d62a17ae | 1985 | static int netlink_request_macs(struct zebra_ns *zns, int family, int type, |
1986 | ifindex_t master_ifindex) | |
2232a77c | 1987 | { |
d62a17ae | 1988 | struct { |
1989 | struct nlmsghdr n; | |
1990 | struct ifinfomsg ifm; | |
1991 | char buf[256]; | |
1992 | } req; | |
1993 | ||
1994 | /* Form the request, specifying filter (rtattr) if needed. */ | |
1995 | memset(&req, 0, sizeof(req)); | |
1996 | req.n.nlmsg_type = type; | |
1997 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg)); | |
1998 | req.ifm.ifi_family = family; | |
1999 | if (master_ifindex) | |
2000 | addattr32(&req.n, sizeof(req), IFLA_MASTER, master_ifindex); | |
2001 | ||
2002 | return netlink_request(&zns->netlink_cmd, &req.n); | |
2232a77c | 2003 | } |
2004 | ||
2005 | /* | |
2006 | * MAC forwarding database read using netlink interface. This is invoked | |
2007 | * at startup. | |
2008 | */ | |
d62a17ae | 2009 | int netlink_macfdb_read(struct zebra_ns *zns) |
2232a77c | 2010 | { |
d62a17ae | 2011 | int ret; |
2012 | ||
2013 | /* Get bridge FDB table. */ | |
2014 | ret = netlink_request_macs(zns, AF_BRIDGE, RTM_GETNEIGH, 0); | |
2015 | if (ret < 0) | |
2016 | return ret; | |
2017 | /* We are reading entire table. */ | |
2018 | filter_vlan = 0; | |
2019 | ret = netlink_parse_info(netlink_macfdb_table, &zns->netlink_cmd, zns, | |
2020 | 0, 1); | |
2021 | ||
2022 | return ret; | |
2232a77c | 2023 | } |
2024 | ||
2025 | /* | |
2026 | * MAC forwarding database read using netlink interface. This is for a | |
2027 | * specific bridge and matching specific access VLAN (if VLAN-aware bridge). | |
2028 | */ | |
d62a17ae | 2029 | int netlink_macfdb_read_for_bridge(struct zebra_ns *zns, struct interface *ifp, |
2030 | struct interface *br_if) | |
2232a77c | 2031 | { |
d62a17ae | 2032 | struct zebra_if *br_zif; |
2033 | struct zebra_if *zif; | |
2034 | struct zebra_l2info_vxlan *vxl; | |
2035 | int ret = 0; | |
2036 | ||
2037 | ||
2038 | /* Save VLAN we're filtering on, if needed. */ | |
2039 | br_zif = (struct zebra_if *)br_if->info; | |
2040 | zif = (struct zebra_if *)ifp->info; | |
2041 | vxl = &zif->l2info.vxl; | |
2042 | if (IS_ZEBRA_IF_BRIDGE_VLAN_AWARE(br_zif)) | |
2043 | filter_vlan = vxl->access_vlan; | |
2044 | ||
2045 | /* Get bridge FDB table for specific bridge - we do the VLAN filtering. | |
2046 | */ | |
2047 | ret = netlink_request_macs(zns, AF_BRIDGE, RTM_GETNEIGH, | |
2048 | br_if->ifindex); | |
2049 | if (ret < 0) | |
2050 | return ret; | |
2051 | ret = netlink_parse_info(netlink_macfdb_table, &zns->netlink_cmd, zns, | |
2052 | 0, 0); | |
2053 | ||
2054 | /* Reset VLAN filter. */ | |
2055 | filter_vlan = 0; | |
2056 | return ret; | |
2232a77c | 2057 | } |
2058 | ||
d62a17ae | 2059 | static int netlink_macfdb_update(struct interface *ifp, vlanid_t vid, |
2060 | struct ethaddr *mac, struct in_addr vtep_ip, | |
d7c0a89a | 2061 | int local, int cmd, uint8_t sticky) |
2232a77c | 2062 | { |
5895d33f | 2063 | struct zebra_ns *zns; |
d62a17ae | 2064 | struct { |
2065 | struct nlmsghdr n; | |
2066 | struct ndmsg ndm; | |
2067 | char buf[256]; | |
2068 | } req; | |
2069 | int dst_alen; | |
2070 | struct zebra_if *zif; | |
2071 | struct interface *br_if; | |
2072 | struct zebra_if *br_zif; | |
2073 | char buf[ETHER_ADDR_STRLEN]; | |
2074 | int vid_present = 0, dst_present = 0; | |
2075 | char vid_buf[20]; | |
2076 | char dst_buf[30]; | |
009f8ad5 | 2077 | struct zebra_vrf *zvrf = zebra_vrf_lookup_by_id(ifp->vrf_id); |
d62a17ae | 2078 | |
009f8ad5 | 2079 | zns = zvrf->zns; |
d62a17ae | 2080 | zif = ifp->info; |
2081 | if ((br_if = zif->brslave_info.br_if) == NULL) { | |
2082 | zlog_warn("MAC %s on IF %s(%u) - no mapping to bridge", | |
2083 | (cmd == RTM_NEWNEIGH) ? "add" : "del", ifp->name, | |
2084 | ifp->ifindex); | |
2085 | return -1; | |
2086 | } | |
2087 | ||
5605ecfc | 2088 | memset(&req, 0, sizeof(req)); |
d62a17ae | 2089 | |
2090 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)); | |
2091 | req.n.nlmsg_flags = NLM_F_REQUEST; | |
2092 | if (cmd == RTM_NEWNEIGH) | |
2093 | req.n.nlmsg_flags |= (NLM_F_CREATE | NLM_F_REPLACE); | |
2094 | req.n.nlmsg_type = cmd; | |
2095 | req.ndm.ndm_family = AF_BRIDGE; | |
2096 | req.ndm.ndm_flags |= NTF_SELF | NTF_MASTER; | |
2097 | req.ndm.ndm_state = NUD_REACHABLE; | |
2098 | ||
2099 | if (sticky) | |
2100 | req.ndm.ndm_state |= NUD_NOARP; | |
2101 | else | |
2102 | req.ndm.ndm_flags |= NTF_EXT_LEARNED; | |
2103 | ||
2104 | addattr_l(&req.n, sizeof(req), NDA_LLADDR, mac, 6); | |
2105 | req.ndm.ndm_ifindex = ifp->ifindex; | |
2106 | if (!local) { | |
2107 | dst_alen = 4; // TODO: hardcoded | |
2108 | addattr_l(&req.n, sizeof(req), NDA_DST, &vtep_ip, dst_alen); | |
2109 | dst_present = 1; | |
2110 | sprintf(dst_buf, " dst %s", inet_ntoa(vtep_ip)); | |
2111 | } | |
2112 | br_zif = (struct zebra_if *)br_if->info; | |
2113 | if (IS_ZEBRA_IF_BRIDGE_VLAN_AWARE(br_zif) && vid > 0) { | |
2114 | addattr16(&req.n, sizeof(req), NDA_VLAN, vid); | |
2115 | vid_present = 1; | |
2116 | sprintf(vid_buf, " VLAN %u", vid); | |
2117 | } | |
2118 | addattr32(&req.n, sizeof(req), NDA_MASTER, br_if->ifindex); | |
2119 | ||
2120 | if (IS_ZEBRA_DEBUG_KERNEL) | |
2121 | zlog_debug("Tx %s family %s IF %s(%u)%s %sMAC %s%s", | |
2122 | nl_msg_type_to_str(cmd), | |
2123 | nl_family_to_str(req.ndm.ndm_family), ifp->name, | |
2124 | ifp->ifindex, vid_present ? vid_buf : "", | |
2125 | sticky ? "sticky " : "", | |
2126 | prefix_mac2str(mac, buf, sizeof(buf)), | |
2127 | dst_present ? dst_buf : ""); | |
2128 | ||
2129 | return netlink_talk(netlink_talk_filter, &req.n, &zns->netlink_cmd, zns, | |
2130 | 0); | |
2232a77c | 2131 | } |
2132 | ||
d62a17ae | 2133 | #define NUD_VALID \ |
2134 | (NUD_PERMANENT | NUD_NOARP | NUD_REACHABLE | NUD_PROBE | NUD_STALE \ | |
2135 | | NUD_DELAY) | |
2232a77c | 2136 | |
2414abd3 | 2137 | static int netlink_ipneigh_change(struct nlmsghdr *h, int len, ns_id_t ns_id) |
2232a77c | 2138 | { |
d62a17ae | 2139 | struct ndmsg *ndm; |
2140 | struct interface *ifp; | |
2141 | struct zebra_if *zif; | |
d62a17ae | 2142 | struct rtattr *tb[NDA_MAX + 1]; |
2143 | struct interface *link_if; | |
2144 | struct ethaddr mac; | |
2145 | struct ipaddr ip; | |
2146 | char buf[ETHER_ADDR_STRLEN]; | |
2147 | char buf2[INET6_ADDRSTRLEN]; | |
2148 | int mac_present = 0; | |
d7c0a89a | 2149 | uint8_t ext_learned; |
d62a17ae | 2150 | |
2151 | ndm = NLMSG_DATA(h); | |
2152 | ||
2153 | /* The interface should exist. */ | |
5895d33f | 2154 | ifp = if_lookup_by_index_per_ns(zebra_ns_lookup(ns_id), |
d62a17ae | 2155 | ndm->ndm_ifindex); |
2853fed6 | 2156 | if (!ifp || !ifp->info) |
d62a17ae | 2157 | return 0; |
2158 | ||
20089ae2 DS |
2159 | zif = (struct zebra_if *)ifp->info; |
2160 | ||
2161 | /* Parse attributes and extract fields of interest. */ | |
2162 | memset(tb, 0, sizeof tb); | |
2163 | netlink_parse_rtattr(tb, NDA_MAX, NDA_RTA(ndm), len); | |
2164 | ||
2165 | if (!tb[NDA_DST]) { | |
2166 | zlog_warn("%s family %s IF %s(%u) - no DST", | |
2167 | nl_msg_type_to_str(h->nlmsg_type), | |
2168 | nl_family_to_str(ndm->ndm_family), ifp->name, | |
2169 | ndm->ndm_ifindex); | |
d62a17ae | 2170 | return 0; |
20089ae2 DS |
2171 | } |
2172 | ||
2173 | memset(&ip, 0, sizeof(struct ipaddr)); | |
2174 | ip.ipa_type = (ndm->ndm_family == AF_INET) ? IPADDR_V4 : IPADDR_V6; | |
2175 | memcpy(&ip.ip.addr, RTA_DATA(tb[NDA_DST]), RTA_PAYLOAD(tb[NDA_DST])); | |
2176 | ||
2177 | /* Drop some "permanent" entries. */ | |
2178 | if (ndm->ndm_state & NUD_PERMANENT) { | |
2179 | char buf[16] = "169.254.0.1"; | |
2180 | struct in_addr ipv4_ll; | |
2181 | ||
2182 | if (ndm->ndm_family != AF_INET) | |
2183 | return 0; | |
2184 | ||
2185 | if (!zif->v6_2_v4_ll_neigh_entry) | |
2186 | return 0; | |
2187 | ||
2188 | if (h->nlmsg_type != RTM_DELNEIGH) | |
2189 | return 0; | |
2190 | ||
2191 | inet_pton(AF_INET, buf, &ipv4_ll); | |
2192 | if (ipv4_ll.s_addr != ip.ip._v4_addr.s_addr) | |
2193 | return 0; | |
2194 | ||
2195 | if_nbr_ipv6ll_to_ipv4ll_neigh_update( | |
2196 | ifp, &zif->v6_2_v4_ll_addr6, true); | |
2197 | return 0; | |
2198 | } | |
d62a17ae | 2199 | |
d62a17ae | 2200 | /* The neighbor is present on an SVI. From this, we locate the |
2201 | * underlying | |
2202 | * bridge because we're only interested in neighbors on a VxLAN bridge. | |
2203 | * The bridge is located based on the nature of the SVI: | |
2204 | * (a) In the case of a VLAN-aware bridge, the SVI is a L3 VLAN | |
2205 | * interface | |
2206 | * and is linked to the bridge | |
2207 | * (b) In the case of a VLAN-unaware bridge, the SVI is the bridge | |
2208 | * inteface | |
2209 | * itself | |
2210 | */ | |
2211 | if (IS_ZEBRA_IF_VLAN(ifp)) { | |
5895d33f | 2212 | link_if = if_lookup_by_index_per_ns(zebra_ns_lookup(ns_id), |
71349e03 | 2213 | zif->link_ifindex); |
d62a17ae | 2214 | if (!link_if) |
2215 | return 0; | |
2216 | } else if (IS_ZEBRA_IF_BRIDGE(ifp)) | |
2217 | link_if = ifp; | |
2218 | else | |
2219 | return 0; | |
2220 | ||
d62a17ae | 2221 | memset(&mac, 0, sizeof(struct ethaddr)); |
d62a17ae | 2222 | if (h->nlmsg_type == RTM_NEWNEIGH) { |
2223 | if (tb[NDA_LLADDR]) { | |
ff8b7eb8 | 2224 | if (RTA_PAYLOAD(tb[NDA_LLADDR]) != ETH_ALEN) { |
d62a17ae | 2225 | zlog_warn( |
df0b13cf | 2226 | "%s family %s IF %s(%u) - LLADDR is not MAC, len %lu", |
d62a17ae | 2227 | nl_msg_type_to_str(h->nlmsg_type), |
2228 | nl_family_to_str(ndm->ndm_family), | |
2229 | ifp->name, ndm->ndm_ifindex, | |
996c9314 LB |
2230 | (unsigned long)RTA_PAYLOAD( |
2231 | tb[NDA_LLADDR])); | |
d62a17ae | 2232 | return 0; |
2233 | } | |
2234 | ||
2235 | mac_present = 1; | |
ff8b7eb8 | 2236 | memcpy(&mac, RTA_DATA(tb[NDA_LLADDR]), ETH_ALEN); |
d62a17ae | 2237 | } |
2238 | ||
2239 | ext_learned = (ndm->ndm_flags & NTF_EXT_LEARNED) ? 1 : 0; | |
2240 | ||
2241 | if (IS_ZEBRA_DEBUG_KERNEL) | |
2242 | zlog_debug( | |
2243 | "Rx %s family %s IF %s(%u) IP %s MAC %s state 0x%x flags 0x%x", | |
2244 | nl_msg_type_to_str(h->nlmsg_type), | |
2245 | nl_family_to_str(ndm->ndm_family), ifp->name, | |
2246 | ndm->ndm_ifindex, | |
2247 | ipaddr2str(&ip, buf2, sizeof(buf2)), | |
2248 | mac_present | |
2249 | ? prefix_mac2str(&mac, buf, sizeof(buf)) | |
2250 | : "", | |
2251 | ndm->ndm_state, ndm->ndm_flags); | |
2252 | ||
2253 | /* If the neighbor state is valid for use, process as an add or | |
2254 | * update | |
2255 | * else process as a delete. Note that the delete handling may | |
2256 | * result | |
2257 | * in re-adding the neighbor if it is a valid "remote" neighbor. | |
2258 | */ | |
2259 | if (ndm->ndm_state & NUD_VALID) | |
ee69da27 | 2260 | return zebra_vxlan_handle_kernel_neigh_update( |
d62a17ae | 2261 | ifp, link_if, &ip, &mac, ndm->ndm_state, |
2262 | ext_learned); | |
2263 | ||
ee69da27 | 2264 | return zebra_vxlan_handle_kernel_neigh_del(ifp, link_if, &ip); |
d62a17ae | 2265 | } |
2266 | ||
2267 | if (IS_ZEBRA_DEBUG_KERNEL) | |
2268 | zlog_debug("Rx %s family %s IF %s(%u) IP %s", | |
2269 | nl_msg_type_to_str(h->nlmsg_type), | |
2270 | nl_family_to_str(ndm->ndm_family), ifp->name, | |
2271 | ndm->ndm_ifindex, | |
2272 | ipaddr2str(&ip, buf2, sizeof(buf2))); | |
2273 | ||
2274 | /* Process the delete - it may result in re-adding the neighbor if it is | |
2275 | * a valid "remote" neighbor. | |
2276 | */ | |
ee69da27 | 2277 | return zebra_vxlan_handle_kernel_neigh_del(ifp, link_if, &ip); |
2232a77c | 2278 | } |
2279 | ||
2414abd3 | 2280 | static int netlink_neigh_table(struct nlmsghdr *h, ns_id_t ns_id, int startup) |
2232a77c | 2281 | { |
d62a17ae | 2282 | int len; |
2283 | struct ndmsg *ndm; | |
2232a77c | 2284 | |
d62a17ae | 2285 | if (h->nlmsg_type != RTM_NEWNEIGH) |
2286 | return 0; | |
2232a77c | 2287 | |
d62a17ae | 2288 | /* Length validity. */ |
2289 | len = h->nlmsg_len - NLMSG_LENGTH(sizeof(struct ndmsg)); | |
2290 | if (len < 0) | |
2291 | return -1; | |
2232a77c | 2292 | |
d62a17ae | 2293 | /* We are interested only in AF_INET or AF_INET6 notifications. */ |
2294 | ndm = NLMSG_DATA(h); | |
2295 | if (ndm->ndm_family != AF_INET && ndm->ndm_family != AF_INET6) | |
2296 | return 0; | |
2232a77c | 2297 | |
2414abd3 | 2298 | return netlink_neigh_change(h, len); |
2232a77c | 2299 | } |
2300 | ||
2301 | /* Request for IP neighbor information from the kernel */ | |
d62a17ae | 2302 | static int netlink_request_neigh(struct zebra_ns *zns, int family, int type, |
2303 | ifindex_t ifindex) | |
2232a77c | 2304 | { |
d62a17ae | 2305 | struct { |
2306 | struct nlmsghdr n; | |
2307 | struct ndmsg ndm; | |
2308 | char buf[256]; | |
2309 | } req; | |
2310 | ||
2311 | /* Form the request, specifying filter (rtattr) if needed. */ | |
2312 | memset(&req, 0, sizeof(req)); | |
2313 | req.n.nlmsg_type = type; | |
2314 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)); | |
2315 | req.ndm.ndm_family = family; | |
2316 | if (ifindex) | |
2317 | addattr32(&req.n, sizeof(req), NDA_IFINDEX, ifindex); | |
2318 | ||
2319 | return netlink_request(&zns->netlink_cmd, &req.n); | |
2232a77c | 2320 | } |
2321 | ||
2322 | /* | |
2323 | * IP Neighbor table read using netlink interface. This is invoked | |
2324 | * at startup. | |
2325 | */ | |
d62a17ae | 2326 | int netlink_neigh_read(struct zebra_ns *zns) |
2232a77c | 2327 | { |
d62a17ae | 2328 | int ret; |
2232a77c | 2329 | |
d62a17ae | 2330 | /* Get IP neighbor table. */ |
2331 | ret = netlink_request_neigh(zns, AF_UNSPEC, RTM_GETNEIGH, 0); | |
2332 | if (ret < 0) | |
2333 | return ret; | |
2334 | ret = netlink_parse_info(netlink_neigh_table, &zns->netlink_cmd, zns, 0, | |
2335 | 1); | |
2232a77c | 2336 | |
d62a17ae | 2337 | return ret; |
2232a77c | 2338 | } |
2339 | ||
2340 | /* | |
2341 | * IP Neighbor table read using netlink interface. This is for a specific | |
2342 | * VLAN device. | |
2343 | */ | |
d62a17ae | 2344 | int netlink_neigh_read_for_vlan(struct zebra_ns *zns, struct interface *vlan_if) |
2232a77c | 2345 | { |
d62a17ae | 2346 | int ret = 0; |
2232a77c | 2347 | |
d62a17ae | 2348 | ret = netlink_request_neigh(zns, AF_UNSPEC, RTM_GETNEIGH, |
2349 | vlan_if->ifindex); | |
2350 | if (ret < 0) | |
2351 | return ret; | |
2352 | ret = netlink_parse_info(netlink_neigh_table, &zns->netlink_cmd, zns, 0, | |
2353 | 0); | |
2232a77c | 2354 | |
d62a17ae | 2355 | return ret; |
2232a77c | 2356 | } |
2357 | ||
2414abd3 | 2358 | int netlink_neigh_change(struct nlmsghdr *h, ns_id_t ns_id) |
2232a77c | 2359 | { |
d62a17ae | 2360 | int len; |
2361 | struct ndmsg *ndm; | |
2232a77c | 2362 | |
d62a17ae | 2363 | if (!(h->nlmsg_type == RTM_NEWNEIGH || h->nlmsg_type == RTM_DELNEIGH)) |
2364 | return 0; | |
2232a77c | 2365 | |
d62a17ae | 2366 | /* Length validity. */ |
2367 | len = h->nlmsg_len - NLMSG_LENGTH(sizeof(struct ndmsg)); | |
9bdf8618 DS |
2368 | if (len < 0) { |
2369 | zlog_err("%s: Message received from netlink is of a broken size %d %zu", | |
2370 | __PRETTY_FUNCTION__, h->nlmsg_len, | |
2371 | (size_t)NLMSG_LENGTH(sizeof(struct ndmsg))); | |
d62a17ae | 2372 | return -1; |
9bdf8618 | 2373 | } |
2232a77c | 2374 | |
d62a17ae | 2375 | /* Is this a notification for the MAC FDB or IP neighbor table? */ |
2376 | ndm = NLMSG_DATA(h); | |
2377 | if (ndm->ndm_family == AF_BRIDGE) | |
2414abd3 | 2378 | return netlink_macfdb_change(h, len, ns_id); |
2232a77c | 2379 | |
d62a17ae | 2380 | if (ndm->ndm_type != RTN_UNICAST) |
2381 | return 0; | |
2232a77c | 2382 | |
d62a17ae | 2383 | if (ndm->ndm_family == AF_INET || ndm->ndm_family == AF_INET6) |
2414abd3 | 2384 | return netlink_ipneigh_change(h, len, ns_id); |
2232a77c | 2385 | |
d62a17ae | 2386 | return 0; |
2232a77c | 2387 | } |
2388 | ||
d62a17ae | 2389 | static int netlink_neigh_update2(struct interface *ifp, struct ipaddr *ip, |
d7c0a89a | 2390 | struct ethaddr *mac, uint32_t flags, int cmd) |
2232a77c | 2391 | { |
d62a17ae | 2392 | struct { |
2393 | struct nlmsghdr n; | |
2394 | struct ndmsg ndm; | |
2395 | char buf[256]; | |
2396 | } req; | |
2397 | int ipa_len; | |
2398 | ||
5895d33f | 2399 | struct zebra_ns *zns; |
d62a17ae | 2400 | char buf[INET6_ADDRSTRLEN]; |
2401 | char buf2[ETHER_ADDR_STRLEN]; | |
009f8ad5 | 2402 | struct zebra_vrf *zvrf = zebra_vrf_lookup_by_id(ifp->vrf_id); |
d62a17ae | 2403 | |
009f8ad5 | 2404 | zns = zvrf->zns; |
5605ecfc | 2405 | memset(&req, 0, sizeof(req)); |
d62a17ae | 2406 | |
2407 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg)); | |
2408 | req.n.nlmsg_flags = NLM_F_REQUEST; | |
2409 | if (cmd == RTM_NEWNEIGH) | |
2410 | req.n.nlmsg_flags |= (NLM_F_CREATE | NLM_F_REPLACE); | |
2411 | req.n.nlmsg_type = cmd; // RTM_NEWNEIGH or RTM_DELNEIGH | |
2412 | req.ndm.ndm_family = IS_IPADDR_V4(ip) ? AF_INET : AF_INET6; | |
2413 | req.ndm.ndm_state = flags; | |
2414 | req.ndm.ndm_ifindex = ifp->ifindex; | |
2415 | req.ndm.ndm_type = RTN_UNICAST; | |
2416 | req.ndm.ndm_flags = NTF_EXT_LEARNED; | |
2417 | ||
2418 | ||
2419 | ipa_len = IS_IPADDR_V4(ip) ? IPV4_MAX_BYTELEN : IPV6_MAX_BYTELEN; | |
2420 | addattr_l(&req.n, sizeof(req), NDA_DST, &ip->ip.addr, ipa_len); | |
2421 | if (mac) | |
2422 | addattr_l(&req.n, sizeof(req), NDA_LLADDR, mac, 6); | |
2423 | ||
2424 | if (IS_ZEBRA_DEBUG_KERNEL) | |
2425 | zlog_debug("Tx %s family %s IF %s(%u) Neigh %s MAC %s", | |
2426 | nl_msg_type_to_str(cmd), | |
2427 | nl_family_to_str(req.ndm.ndm_family), ifp->name, | |
2428 | ifp->ifindex, ipaddr2str(ip, buf, sizeof(buf)), | |
2429 | mac ? prefix_mac2str(mac, buf2, sizeof(buf2)) | |
2430 | : "null"); | |
2431 | ||
2432 | return netlink_talk(netlink_talk_filter, &req.n, &zns->netlink_cmd, zns, | |
2433 | 0); | |
2232a77c | 2434 | } |
2435 | ||
d62a17ae | 2436 | int kernel_add_mac(struct interface *ifp, vlanid_t vid, struct ethaddr *mac, |
d7c0a89a | 2437 | struct in_addr vtep_ip, uint8_t sticky) |
2232a77c | 2438 | { |
d62a17ae | 2439 | return netlink_macfdb_update(ifp, vid, mac, vtep_ip, 0, RTM_NEWNEIGH, |
2440 | sticky); | |
2232a77c | 2441 | } |
2442 | ||
d62a17ae | 2443 | int kernel_del_mac(struct interface *ifp, vlanid_t vid, struct ethaddr *mac, |
2444 | struct in_addr vtep_ip, int local) | |
2232a77c | 2445 | { |
d62a17ae | 2446 | return netlink_macfdb_update(ifp, vid, mac, vtep_ip, local, |
2447 | RTM_DELNEIGH, 0); | |
2232a77c | 2448 | } |
2449 | ||
d62a17ae | 2450 | int kernel_add_neigh(struct interface *ifp, struct ipaddr *ip, |
2451 | struct ethaddr *mac) | |
2232a77c | 2452 | { |
e9d2cbde | 2453 | return netlink_neigh_update2(ifp, ip, mac, NUD_NOARP, RTM_NEWNEIGH); |
2232a77c | 2454 | } |
2455 | ||
d62a17ae | 2456 | int kernel_del_neigh(struct interface *ifp, struct ipaddr *ip) |
2232a77c | 2457 | { |
d62a17ae | 2458 | return netlink_neigh_update2(ifp, ip, NULL, 0, RTM_DELNEIGH); |
2232a77c | 2459 | } |
2460 | ||
40c7bdb0 | 2461 | /* |
2462 | * MPLS label forwarding table change via netlink interface. | |
2463 | */ | |
d62a17ae | 2464 | int netlink_mpls_multipath(int cmd, zebra_lsp_t *lsp) |
40c7bdb0 | 2465 | { |
d62a17ae | 2466 | mpls_lse_t lse; |
2467 | zebra_nhlfe_t *nhlfe; | |
2468 | struct nexthop *nexthop = NULL; | |
2469 | unsigned int nexthop_num; | |
2470 | const char *routedesc; | |
2471 | struct zebra_ns *zns = zebra_ns_lookup(NS_DEFAULT); | |
805444ce | 2472 | int route_type; |
d62a17ae | 2473 | |
2474 | struct { | |
2475 | struct nlmsghdr n; | |
2476 | struct rtmsg r; | |
2477 | char buf[NL_PKT_BUF_SIZE]; | |
2478 | } req; | |
2479 | ||
2480 | memset(&req, 0, sizeof req - NL_PKT_BUF_SIZE); | |
2481 | ||
d62a17ae | 2482 | /* |
2483 | * Count # nexthops so we can decide whether to use singlepath | |
2484 | * or multipath case. | |
2485 | */ | |
2486 | nexthop_num = 0; | |
2487 | for (nhlfe = lsp->nhlfe_list; nhlfe; nhlfe = nhlfe->next) { | |
2488 | nexthop = nhlfe->nexthop; | |
2489 | if (!nexthop) | |
2490 | continue; | |
2491 | if (cmd == RTM_NEWROUTE) { | |
2492 | /* Count all selected NHLFEs */ | |
2493 | if (CHECK_FLAG(nhlfe->flags, NHLFE_FLAG_SELECTED) | |
2494 | && CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE)) | |
2495 | nexthop_num++; | |
2496 | } else /* DEL */ | |
2497 | { | |
2498 | /* Count all installed NHLFEs */ | |
2499 | if (CHECK_FLAG(nhlfe->flags, NHLFE_FLAG_INSTALLED) | |
2500 | && CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB)) | |
2501 | nexthop_num++; | |
2502 | } | |
2503 | } | |
2504 | ||
8dc8a4b6 | 2505 | if ((nexthop_num == 0) || (!lsp->best_nhlfe && (cmd != RTM_DELROUTE))) |
d62a17ae | 2506 | return 0; |
2507 | ||
2508 | req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)); | |
2509 | req.n.nlmsg_flags = NLM_F_CREATE | NLM_F_REQUEST; | |
2510 | req.n.nlmsg_type = cmd; | |
2511 | req.n.nlmsg_pid = zns->netlink_cmd.snl.nl_pid; | |
2512 | ||
2513 | req.r.rtm_family = AF_MPLS; | |
2514 | req.r.rtm_table = RT_TABLE_MAIN; | |
2515 | req.r.rtm_dst_len = MPLS_LABEL_LEN_BITS; | |
d62a17ae | 2516 | req.r.rtm_scope = RT_SCOPE_UNIVERSE; |
2517 | req.r.rtm_type = RTN_UNICAST; | |
2518 | ||
8dc8a4b6 | 2519 | if (cmd == RTM_NEWROUTE) { |
d62a17ae | 2520 | /* We do a replace to handle update. */ |
2521 | req.n.nlmsg_flags |= NLM_F_REPLACE; | |
2522 | ||
8dc8a4b6 DS |
2523 | /* set the protocol value if installing */ |
2524 | route_type = re_type_from_lsp_type(lsp->best_nhlfe->type); | |
2525 | req.r.rtm_protocol = zebra2proto(route_type); | |
2526 | } | |
2527 | ||
d62a17ae | 2528 | /* Fill destination */ |
2529 | lse = mpls_lse_encode(lsp->ile.in_label, 0, 0, 1); | |
2530 | addattr_l(&req.n, sizeof req, RTA_DST, &lse, sizeof(mpls_lse_t)); | |
2531 | ||
2532 | /* Fill nexthops (paths) based on single-path or multipath. The paths | |
2533 | * chosen depend on the operation. | |
2534 | */ | |
2535 | if (nexthop_num == 1 || multipath_num == 1) { | |
8b1450b9 | 2536 | routedesc = "single-path"; |
d62a17ae | 2537 | _netlink_mpls_debug(cmd, lsp->ile.in_label, routedesc); |
2538 | ||
2539 | nexthop_num = 0; | |
2540 | for (nhlfe = lsp->nhlfe_list; nhlfe; nhlfe = nhlfe->next) { | |
2541 | nexthop = nhlfe->nexthop; | |
2542 | if (!nexthop) | |
2543 | continue; | |
2544 | ||
2545 | if ((cmd == RTM_NEWROUTE | |
2546 | && (CHECK_FLAG(nhlfe->flags, NHLFE_FLAG_SELECTED) | |
2547 | && CHECK_FLAG(nexthop->flags, | |
2548 | NEXTHOP_FLAG_ACTIVE))) | |
2549 | || (cmd == RTM_DELROUTE | |
2550 | && (CHECK_FLAG(nhlfe->flags, | |
2551 | NHLFE_FLAG_INSTALLED) | |
2552 | && CHECK_FLAG(nexthop->flags, | |
2553 | NEXTHOP_FLAG_FIB)))) { | |
2554 | /* Add the gateway */ | |
2555 | _netlink_mpls_build_singlepath(routedesc, nhlfe, | |
2556 | &req.n, &req.r, | |
2557 | sizeof req, cmd); | |
d62a17ae | 2558 | nexthop_num++; |
2559 | break; | |
2560 | } | |
2561 | } | |
2562 | } else /* Multipath case */ | |
2563 | { | |
2564 | char buf[NL_PKT_BUF_SIZE]; | |
2565 | struct rtattr *rta = (void *)buf; | |
2566 | struct rtnexthop *rtnh; | |
2567 | union g_addr *src1 = NULL; | |
2568 | ||
2569 | rta->rta_type = RTA_MULTIPATH; | |
2570 | rta->rta_len = RTA_LENGTH(0); | |
2571 | rtnh = RTA_DATA(rta); | |
2572 | ||
8b1450b9 | 2573 | routedesc = "multipath"; |
d62a17ae | 2574 | _netlink_mpls_debug(cmd, lsp->ile.in_label, routedesc); |
2575 | ||
2576 | nexthop_num = 0; | |
2577 | for (nhlfe = lsp->nhlfe_list; nhlfe; nhlfe = nhlfe->next) { | |
2578 | nexthop = nhlfe->nexthop; | |
2579 | if (!nexthop) | |
2580 | continue; | |
2581 | ||
2582 | if (nexthop_num >= multipath_num) | |
2583 | break; | |
2584 | ||
2585 | if ((cmd == RTM_NEWROUTE | |
2586 | && (CHECK_FLAG(nhlfe->flags, NHLFE_FLAG_SELECTED) | |
2587 | && CHECK_FLAG(nexthop->flags, | |
2588 | NEXTHOP_FLAG_ACTIVE))) | |
2589 | || (cmd == RTM_DELROUTE | |
2590 | && (CHECK_FLAG(nhlfe->flags, | |
2591 | NHLFE_FLAG_INSTALLED) | |
2592 | && CHECK_FLAG(nexthop->flags, | |
2593 | NEXTHOP_FLAG_FIB)))) { | |
2594 | nexthop_num++; | |
2595 | ||
2596 | /* Build the multipath */ | |
2597 | _netlink_mpls_build_multipath(routedesc, nhlfe, | |
2598 | rta, rtnh, &req.r, | |
2599 | &src1); | |
2600 | rtnh = RTNH_NEXT(rtnh); | |
d62a17ae | 2601 | } |
2602 | } | |
2603 | ||
2604 | /* Add the multipath */ | |
2605 | if (rta->rta_len > RTA_LENGTH(0)) | |
2606 | addattr_l(&req.n, NL_PKT_BUF_SIZE, RTA_MULTIPATH, | |
2607 | RTA_DATA(rta), RTA_PAYLOAD(rta)); | |
2608 | } | |
2609 | ||
2610 | /* Talk to netlink socket. */ | |
2611 | return netlink_talk(netlink_talk_filter, &req.n, &zns->netlink_cmd, zns, | |
2612 | 0); | |
40c7bdb0 | 2613 | } |
ddfeb486 | 2614 | #endif /* HAVE_NETLINK */ |